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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/libwebrtc/audio
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/audio')
-rw-r--r--third_party/libwebrtc/audio/BUILD.gn338
-rw-r--r--third_party/libwebrtc/audio/DEPS27
-rw-r--r--third_party/libwebrtc/audio/OWNERS5
-rw-r--r--third_party/libwebrtc/audio/audio_gn/moz.build245
-rw-r--r--third_party/libwebrtc/audio/audio_level.cc98
-rw-r--r--third_party/libwebrtc/audio/audio_level.h75
-rw-r--r--third_party/libwebrtc/audio/audio_receive_stream.cc497
-rw-r--r--third_party/libwebrtc/audio/audio_receive_stream.h174
-rw-r--r--third_party/libwebrtc/audio/audio_receive_stream_unittest.cc439
-rw-r--r--third_party/libwebrtc/audio/audio_send_stream.cc941
-rw-r--r--third_party/libwebrtc/audio/audio_send_stream.h241
-rw-r--r--third_party/libwebrtc/audio/audio_send_stream_tests.cc248
-rw-r--r--third_party/libwebrtc/audio/audio_send_stream_unittest.cc949
-rw-r--r--third_party/libwebrtc/audio/audio_state.cc213
-rw-r--r--third_party/libwebrtc/audio/audio_state.h92
-rw-r--r--third_party/libwebrtc/audio/audio_state_unittest.cc366
-rw-r--r--third_party/libwebrtc/audio/audio_transport_impl.cc285
-rw-r--r--third_party/libwebrtc/audio/audio_transport_impl.h117
-rw-r--r--third_party/libwebrtc/audio/channel_receive.cc1137
-rw-r--r--third_party/libwebrtc/audio/channel_receive.h196
-rw-r--r--third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.cc103
-rw-r--r--third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h74
-rw-r--r--third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate_unittest.cc118
-rw-r--r--third_party/libwebrtc/audio/channel_receive_unittest.cc50
-rw-r--r--third_party/libwebrtc/audio/channel_send.cc983
-rw-r--r--third_party/libwebrtc/audio/channel_send.h148
-rw-r--r--third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.cc130
-rw-r--r--third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.h81
-rw-r--r--third_party/libwebrtc/audio/channel_send_frame_transformer_delegate_unittest.cc127
-rw-r--r--third_party/libwebrtc/audio/channel_send_unittest.cc113
-rw-r--r--third_party/libwebrtc/audio/conversion.h30
-rw-r--r--third_party/libwebrtc/audio/mock_voe_channel_proxy.h186
-rw-r--r--third_party/libwebrtc/audio/remix_resample.cc91
-rw-r--r--third_party/libwebrtc/audio/remix_resample.h44
-rw-r--r--third_party/libwebrtc/audio/remix_resample_unittest.cc276
-rw-r--r--third_party/libwebrtc/audio/test/OWNERS3
-rw-r--r--third_party/libwebrtc/audio/test/audio_end_to_end_test.cc91
-rw-r--r--third_party/libwebrtc/audio/test/audio_end_to_end_test.h64
-rw-r--r--third_party/libwebrtc/audio/test/audio_stats_test.cc115
-rw-r--r--third_party/libwebrtc/audio/test/low_bandwidth_audio_test.cc109
-rwxr-xr-xthird_party/libwebrtc/audio/test/low_bandwidth_audio_test.py365
-rw-r--r--third_party/libwebrtc/audio/test/low_bandwidth_audio_test_flags.cc28
-rw-r--r--third_party/libwebrtc/audio/test/nack_test.cc59
-rw-r--r--third_party/libwebrtc/audio/test/non_sender_rtt_test.cc58
-rw-r--r--third_party/libwebrtc/audio/test/pc_low_bandwidth_audio_test.cc176
-rwxr-xr-xthird_party/libwebrtc/audio/test/unittests/low_bandwidth_audio_test_test.py239
-rw-r--r--third_party/libwebrtc/audio/utility/BUILD.gn56
-rw-r--r--third_party/libwebrtc/audio/utility/audio_frame_operations.cc294
-rw-r--r--third_party/libwebrtc/audio/utility/audio_frame_operations.h107
-rw-r--r--third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build234
-rw-r--r--third_party/libwebrtc/audio/utility/audio_frame_operations_unittest.cc622
-rw-r--r--third_party/libwebrtc/audio/utility/channel_mixer.cc99
-rw-r--r--third_party/libwebrtc/audio/utility/channel_mixer.h86
-rw-r--r--third_party/libwebrtc/audio/utility/channel_mixer_unittest.cc393
-rw-r--r--third_party/libwebrtc/audio/utility/channel_mixing_matrix.cc333
-rw-r--r--third_party/libwebrtc/audio/utility/channel_mixing_matrix.h76
-rw-r--r--third_party/libwebrtc/audio/utility/channel_mixing_matrix_unittest.cc476
-rw-r--r--third_party/libwebrtc/audio/voip/BUILD.gn103
-rw-r--r--third_party/libwebrtc/audio/voip/audio_channel.cc173
-rw-r--r--third_party/libwebrtc/audio/voip/audio_channel.h131
-rw-r--r--third_party/libwebrtc/audio/voip/audio_egress.cc182
-rw-r--r--third_party/libwebrtc/audio/voip/audio_egress.h158
-rw-r--r--third_party/libwebrtc/audio/voip/audio_ingress.cc296
-rw-r--r--third_party/libwebrtc/audio/voip/audio_ingress.h145
-rw-r--r--third_party/libwebrtc/audio/voip/test/BUILD.gn101
-rw-r--r--third_party/libwebrtc/audio/voip/test/audio_channel_unittest.cc357
-rw-r--r--third_party/libwebrtc/audio/voip/test/audio_egress_unittest.cc327
-rw-r--r--third_party/libwebrtc/audio/voip/test/audio_ingress_unittest.cc238
-rw-r--r--third_party/libwebrtc/audio/voip/test/mock_task_queue.h55
-rw-r--r--third_party/libwebrtc/audio/voip/test/voip_core_unittest.cc193
-rw-r--r--third_party/libwebrtc/audio/voip/voip_core.cc500
-rw-r--r--third_party/libwebrtc/audio/voip/voip_core.h174
72 files changed, 16453 insertions, 0 deletions
diff --git a/third_party/libwebrtc/audio/BUILD.gn b/third_party/libwebrtc/audio/BUILD.gn
new file mode 100644
index 0000000000..6ca47d4d1e
--- /dev/null
+++ b/third_party/libwebrtc/audio/BUILD.gn
@@ -0,0 +1,338 @@
+# Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS. All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+import("../webrtc.gni")
+if (is_android) {
+ import("//build/config/android/config.gni")
+ import("//build/config/android/rules.gni")
+}
+
+rtc_library("audio") {
+ sources = [
+ "audio_level.cc",
+ "audio_level.h",
+ "audio_receive_stream.cc",
+ "audio_receive_stream.h",
+ "audio_send_stream.cc",
+ "audio_send_stream.h",
+ "audio_state.cc",
+ "audio_state.h",
+ "audio_transport_impl.cc",
+ "audio_transport_impl.h",
+ "channel_receive.cc",
+ "channel_receive.h",
+ "channel_receive_frame_transformer_delegate.cc",
+ "channel_receive_frame_transformer_delegate.h",
+ "channel_send.cc",
+ "channel_send.h",
+ "channel_send_frame_transformer_delegate.cc",
+ "channel_send_frame_transformer_delegate.h",
+ "conversion.h",
+ "remix_resample.cc",
+ "remix_resample.h",
+ ]
+
+ deps = [
+ "../api:array_view",
+ "../api:call_api",
+ "../api:field_trials_view",
+ "../api:frame_transformer_interface",
+ "../api:function_view",
+ "../api:rtp_headers",
+ "../api:rtp_parameters",
+ "../api:scoped_refptr",
+ "../api:sequence_checker",
+ "../api:transport_api",
+ "../api/audio:aec3_factory",
+ "../api/audio:audio_frame_api",
+ "../api/audio:audio_frame_processor",
+ "../api/audio:audio_mixer_api",
+ "../api/audio_codecs:audio_codecs_api",
+ "../api/crypto:frame_decryptor_interface",
+ "../api/crypto:frame_encryptor_interface",
+ "../api/crypto:options",
+ "../api/neteq:neteq_api",
+ "../api/rtc_event_log",
+ "../api/task_queue",
+ "../api/task_queue:pending_task_safety_flag",
+ "../api/transport/rtp:rtp_source",
+ "../api/units:time_delta",
+ "../call:audio_sender_interface",
+ "../call:bitrate_allocator",
+ "../call:call_interfaces",
+ "../call:rtp_interfaces",
+ "../common_audio",
+ "../common_audio:common_audio_c",
+ "../logging:rtc_event_audio",
+ "../logging:rtc_stream_config",
+ "../media:media_channel",
+ "../media:rtc_media_base",
+ "../modules/async_audio_processing",
+ "../modules/audio_coding",
+ "../modules/audio_coding:audio_coding_module_typedefs",
+ "../modules/audio_coding:audio_encoder_cng",
+ "../modules/audio_coding:audio_network_adaptor_config",
+ "../modules/audio_coding:red",
+ "../modules/audio_device",
+ "../modules/audio_processing",
+ "../modules/audio_processing:api",
+ "../modules/audio_processing:audio_frame_proxies",
+ "../modules/audio_processing:rms_level",
+ "../modules/pacing",
+ "../modules/rtp_rtcp",
+ "../modules/rtp_rtcp:rtp_rtcp_format",
+ "../modules/utility:utility",
+ "../rtc_base:audio_format_to_string",
+ "../rtc_base:buffer",
+ "../rtc_base:checks",
+ "../rtc_base:event_tracer",
+ "../rtc_base:logging",
+ "../rtc_base:macromagic",
+ "../rtc_base:race_checker",
+ "../rtc_base:rate_limiter",
+ "../rtc_base:refcount",
+ "../rtc_base:rtc_event",
+ "../rtc_base:rtc_numerics",
+ "../rtc_base:rtc_task_queue",
+ "../rtc_base:safe_conversions",
+ "../rtc_base:safe_minmax",
+ "../rtc_base:stringutils",
+ "../rtc_base:threading",
+ "../rtc_base:timeutils",
+ "../rtc_base/containers:flat_set",
+ "../rtc_base/experiments:field_trial_parser",
+ "../rtc_base/synchronization:mutex",
+ "../rtc_base/system:no_unique_address",
+ "../rtc_base/task_utils:repeating_task",
+ "../system_wrappers",
+ "../system_wrappers:field_trial",
+ "../system_wrappers:metrics",
+ "utility:audio_frame_operations",
+ ]
+ absl_deps = [
+ "//third_party/abseil-cpp/absl/functional:any_invocable",
+ "//third_party/abseil-cpp/absl/memory",
+ "//third_party/abseil-cpp/absl/strings",
+ "//third_party/abseil-cpp/absl/types:optional",
+ ]
+}
+if (rtc_include_tests) {
+ rtc_library("audio_end_to_end_test") {
+ testonly = true
+
+ sources = [
+ "test/audio_end_to_end_test.cc",
+ "test/audio_end_to_end_test.h",
+ ]
+ deps = [
+ ":audio",
+ "../api:simulated_network_api",
+ "../api/task_queue",
+ "../call:fake_network",
+ "../call:simulated_network",
+ "../system_wrappers",
+ "../test:test_common",
+ "../test:test_support",
+ ]
+ }
+
+ rtc_library("audio_tests") {
+ testonly = true
+
+ sources = [
+ "audio_receive_stream_unittest.cc",
+ "audio_send_stream_tests.cc",
+ "audio_send_stream_unittest.cc",
+ "audio_state_unittest.cc",
+ "channel_receive_frame_transformer_delegate_unittest.cc",
+ "channel_send_frame_transformer_delegate_unittest.cc",
+ "channel_send_unittest.cc",
+ "mock_voe_channel_proxy.h",
+ "remix_resample_unittest.cc",
+ "test/audio_stats_test.cc",
+ "test/nack_test.cc",
+ "test/non_sender_rtt_test.cc",
+ ]
+ deps = [
+ ":audio",
+ ":audio_end_to_end_test",
+ ":channel_receive_unittest",
+ "../api:libjingle_peerconnection_api",
+ "../api:mock_audio_mixer",
+ "../api:mock_frame_decryptor",
+ "../api:mock_frame_encryptor",
+ "../api:scoped_refptr",
+ "../api/audio:audio_frame_api",
+ "../api/audio_codecs:audio_codecs_api",
+ "../api/audio_codecs:builtin_audio_encoder_factory",
+ "../api/audio_codecs/opus:audio_decoder_opus",
+ "../api/audio_codecs/opus:audio_encoder_opus",
+ "../api/crypto:frame_decryptor_interface",
+ "../api/rtc_event_log",
+ "../api/task_queue:default_task_queue_factory",
+ "../api/task_queue/test:mock_task_queue_base",
+ "../api/units:time_delta",
+ "../api/units:timestamp",
+ "../call:mock_bitrate_allocator",
+ "../call:mock_call_interfaces",
+ "../call:mock_rtp_interfaces",
+ "../call:rtp_interfaces",
+ "../call:rtp_receiver",
+ "../call:rtp_sender",
+ "../common_audio",
+ "../logging:mocks",
+ "../modules/audio_device:audio_device_api",
+ "../modules/audio_device:audio_device_impl", # For TestAudioDeviceModule
+ "../modules/audio_device:mock_audio_device",
+ "../modules/audio_mixer:audio_mixer_impl",
+ "../modules/audio_mixer:audio_mixer_test_utils",
+ "../modules/audio_processing:audio_processing_statistics",
+ "../modules/audio_processing:mocks",
+ "../modules/pacing",
+ "../modules/rtp_rtcp:mock_rtp_rtcp",
+ "../modules/rtp_rtcp:rtp_rtcp_format",
+ "../modules/utility:utility",
+ "../rtc_base:checks",
+ "../rtc_base:macromagic",
+ "../rtc_base:refcount",
+ "../rtc_base:rtc_base_tests_utils",
+ "../rtc_base:safe_compare",
+ "../rtc_base:task_queue_for_test",
+ "../rtc_base:threading",
+ "../rtc_base:timeutils",
+ "../system_wrappers",
+ "../test:audio_codec_mocks",
+ "../test:field_trial",
+ "../test:mock_frame_transformer",
+ "../test:mock_transformable_frame",
+ "../test:mock_transport",
+ "../test:rtp_test_utils",
+ "../test:scoped_key_value_config",
+ "../test:test_common",
+ "../test:test_support",
+ "../test/time_controller:time_controller",
+ "utility:utility_tests",
+ "//testing/gtest",
+ ]
+ }
+
+ rtc_library("channel_receive_unittest") {
+ testonly = true
+ sources = [ "channel_receive_unittest.cc" ]
+ deps = [
+ ":audio",
+ "../api/crypto:frame_decryptor_interface",
+ "../api/task_queue:default_task_queue_factory",
+ "../modules/audio_device:audio_device_api",
+ "../modules/audio_device:mock_audio_device",
+ "../rtc_base:threading",
+ "../test:mock_transport",
+ "../test:test_support",
+ "../test/time_controller",
+ ]
+ }
+
+ if (rtc_enable_protobuf && !build_with_chromium) {
+ rtc_test("low_bandwidth_audio_test") {
+ testonly = true
+
+ sources = [
+ "test/low_bandwidth_audio_test.cc",
+ "test/low_bandwidth_audio_test_flags.cc",
+ "test/pc_low_bandwidth_audio_test.cc",
+ ]
+
+ deps = [
+ ":audio_end_to_end_test",
+ "../api:create_network_emulation_manager",
+ "../api:create_peerconnection_quality_test_fixture",
+ "../api:network_emulation_manager_api",
+ "../api:peer_connection_quality_test_fixture_api",
+ "../api:simulated_network_api",
+ "../api:time_controller",
+ "../api/test/metrics:chrome_perf_dashboard_metrics_exporter",
+ "../api/test/metrics:global_metrics_logger_and_exporter",
+ "../api/test/metrics:metrics_exporter",
+ "../api/test/metrics:stdout_metrics_exporter",
+ "../api/test/pclf:media_configuration",
+ "../api/test/pclf:media_quality_test_params",
+ "../api/test/pclf:peer_configurer",
+ "../call:simulated_network",
+ "../common_audio",
+ "../system_wrappers",
+ "../test:fileutils",
+ "../test:test_common",
+ "../test:test_main",
+ "../test:test_support",
+ "../test/pc/e2e:network_quality_metrics_reporter",
+ "//testing/gtest",
+ ]
+ absl_deps = [
+ "//third_party/abseil-cpp/absl/flags:flag",
+ "//third_party/abseil-cpp/absl/strings",
+ ]
+ if (is_android) {
+ use_default_launcher = false
+ deps += [
+ "//build/android/gtest_apk:native_test_instrumentation_test_runner_java",
+ "//testing/android/native_test:native_test_java",
+ "//testing/android/native_test:native_test_support",
+ ]
+ }
+ data = [
+ "../resources/voice_engine/audio_tiny16.wav",
+ "../resources/voice_engine/audio_tiny48.wav",
+ ]
+ }
+
+ group("low_bandwidth_audio_perf_test") {
+ testonly = true
+
+ deps = [
+ ":low_bandwidth_audio_test",
+ "//third_party/catapult/tracing/tracing/proto:histogram_proto",
+ "//third_party/protobuf:py_proto_runtime",
+ ]
+
+ data = [
+ "test/low_bandwidth_audio_test.py",
+ "../resources/voice_engine/audio_tiny16.wav",
+ "../resources/voice_engine/audio_tiny48.wav",
+ "${root_out_dir}/pyproto/tracing/tracing/proto/histogram_pb2.py",
+ ]
+
+ # TODO(http://crbug.com/1029452): Create a cleaner target with just the
+ # tracing python code. We don't need Polymer for instance.
+ data_deps = [ "//third_party/catapult/tracing:convert_chart_json" ]
+
+ if (is_win) {
+ data += [ "${root_out_dir}/low_bandwidth_audio_test.exe" ]
+ } else {
+ data += [ "${root_out_dir}/low_bandwidth_audio_test" ]
+ }
+
+ if (is_linux || is_chromeos || is_android || is_fuchsia) {
+ data += [
+ "../tools_webrtc/audio_quality/linux/PolqaOem64",
+ "../tools_webrtc/audio_quality/linux/pesq",
+ ]
+ }
+ if (is_win) {
+ data += [
+ "../tools_webrtc/audio_quality/win/PolqaOem64.dll",
+ "../tools_webrtc/audio_quality/win/PolqaOem64.exe",
+ "../tools_webrtc/audio_quality/win/pesq.exe",
+ "../tools_webrtc/audio_quality/win/vcomp120.dll",
+ ]
+ }
+ if (is_mac) {
+ data += [ "../tools_webrtc/audio_quality/mac/pesq" ]
+ }
+ }
+ }
+}
diff --git a/third_party/libwebrtc/audio/DEPS b/third_party/libwebrtc/audio/DEPS
new file mode 100644
index 0000000000..7a0c7e7ce6
--- /dev/null
+++ b/third_party/libwebrtc/audio/DEPS
@@ -0,0 +1,27 @@
+include_rules = [
+ "+call",
+ "+common_audio",
+ "+logging/rtc_event_log",
+ "+media/base",
+ "+modules/async_audio_processing",
+ "+modules/audio_coding",
+ "+modules/audio_device",
+ "+modules/audio_mixer",
+ "+modules/audio_processing",
+ "+modules/audio_processing/include",
+ "+modules/bitrate_controller",
+ "+modules/congestion_controller",
+ "+modules/pacing",
+ "+modules/rtp_rtcp",
+ "+modules/utility",
+ "+system_wrappers",
+]
+
+specific_include_rules = {
+ "audio_send_stream.cc": [
+ "+modules/audio_coding/codecs/cng/audio_encoder_cng.h",
+ ],
+ "audio_transport_impl.h": [
+ "+modules/audio_processing/typing_detection.h",
+ ]
+}
diff --git a/third_party/libwebrtc/audio/OWNERS b/third_party/libwebrtc/audio/OWNERS
new file mode 100644
index 0000000000..e629bc1815
--- /dev/null
+++ b/third_party/libwebrtc/audio/OWNERS
@@ -0,0 +1,5 @@
+alessiob@webrtc.org
+gustaf@webrtc.org
+henrik.lundin@webrtc.org
+jakobi@webrtc.org
+peah@webrtc.org
diff --git a/third_party/libwebrtc/audio/audio_gn/moz.build b/third_party/libwebrtc/audio/audio_gn/moz.build
new file mode 100644
index 0000000000..8a35de2e88
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_gn/moz.build
@@ -0,0 +1,245 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+ ### This moz.build was AUTOMATICALLY GENERATED from a GN config, ###
+ ### DO NOT edit it by hand. ###
+
+COMPILE_FLAGS["OS_INCLUDES"] = []
+AllowCompilerWarnings()
+
+DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
+DEFINES["RTC_DAV1D_IN_INTERNAL_DECODER_FACTORY"] = True
+DEFINES["RTC_ENABLE_VP9"] = True
+DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
+DEFINES["WEBRTC_LIBRARY_IMPL"] = True
+DEFINES["WEBRTC_MOZILLA_BUILD"] = True
+DEFINES["WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS"] = "0"
+DEFINES["WEBRTC_STRICT_FIELD_TRIALS"] = "0"
+
+FINAL_LIBRARY = "webrtc"
+
+
+LOCAL_INCLUDES += [
+ "!/ipc/ipdl/_ipdlheaders",
+ "!/third_party/libwebrtc/gen",
+ "/ipc/chromium/src",
+ "/third_party/libwebrtc/",
+ "/third_party/libwebrtc/third_party/abseil-cpp/",
+ "/tools/profiler/public"
+]
+
+SOURCES += [
+ "/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.cc"
+]
+
+UNIFIED_SOURCES += [
+ "/third_party/libwebrtc/audio/audio_level.cc",
+ "/third_party/libwebrtc/audio/audio_receive_stream.cc",
+ "/third_party/libwebrtc/audio/audio_send_stream.cc",
+ "/third_party/libwebrtc/audio/audio_state.cc",
+ "/third_party/libwebrtc/audio/audio_transport_impl.cc",
+ "/third_party/libwebrtc/audio/channel_receive.cc",
+ "/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.cc",
+ "/third_party/libwebrtc/audio/channel_send.cc",
+ "/third_party/libwebrtc/audio/remix_resample.cc"
+]
+
+if not CONFIG["MOZ_DEBUG"]:
+
+ DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "0"
+ DEFINES["NDEBUG"] = True
+ DEFINES["NVALGRIND"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1":
+
+ DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
+
+if CONFIG["OS_TARGET"] == "Android":
+
+ DEFINES["ANDROID"] = True
+ DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r22_1"
+ DEFINES["HAVE_SYS_UIO_H"] = True
+ DEFINES["WEBRTC_ANDROID"] = True
+ DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+ DEFINES["WEBRTC_LINUX"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_GNU_SOURCE"] = True
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+ OS_LIBS += [
+ "GLESv2",
+ "log"
+ ]
+
+if CONFIG["OS_TARGET"] == "Darwin":
+
+ DEFINES["WEBRTC_MAC"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_LIBCPP_HAS_NO_ALIGNED_ALLOCATION"] = True
+ DEFINES["__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES"] = "0"
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["USE_AURA"] = "1"
+ DEFINES["USE_GLIB"] = "1"
+ DEFINES["USE_NSS_CERTS"] = "1"
+ DEFINES["USE_OZONE"] = "1"
+ DEFINES["USE_UDEV"] = True
+ DEFINES["WEBRTC_LINUX"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_FILE_OFFSET_BITS"] = "64"
+ DEFINES["_LARGEFILE64_SOURCE"] = True
+ DEFINES["_LARGEFILE_SOURCE"] = True
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+ OS_LIBS += [
+ "rt"
+ ]
+
+if CONFIG["OS_TARGET"] == "OpenBSD":
+
+ DEFINES["USE_GLIB"] = "1"
+ DEFINES["USE_OZONE"] = "1"
+ DEFINES["USE_X11"] = "1"
+ DEFINES["WEBRTC_BSD"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_FILE_OFFSET_BITS"] = "64"
+ DEFINES["_LARGEFILE64_SOURCE"] = True
+ DEFINES["_LARGEFILE_SOURCE"] = True
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "WINNT":
+
+ DEFINES["CERT_CHAIN_PARA_HAS_EXTRA_FIELDS"] = True
+ DEFINES["NOMINMAX"] = True
+ DEFINES["NTDDI_VERSION"] = "0x0A000000"
+ DEFINES["PSAPI_VERSION"] = "2"
+ DEFINES["UNICODE"] = True
+ DEFINES["USE_AURA"] = "1"
+ DEFINES["WEBRTC_WIN"] = True
+ DEFINES["WIN32"] = True
+ DEFINES["WIN32_LEAN_AND_MEAN"] = True
+ DEFINES["WINAPI_FAMILY"] = "WINAPI_FAMILY_DESKTOP_APP"
+ DEFINES["WINVER"] = "0x0A00"
+ DEFINES["_ATL_NO_OPENGL"] = True
+ DEFINES["_CRT_RAND_S"] = True
+ DEFINES["_CRT_SECURE_NO_DEPRECATE"] = True
+ DEFINES["_ENABLE_EXTENDED_ALIGNED_STORAGE"] = True
+ DEFINES["_HAS_EXCEPTIONS"] = "0"
+ DEFINES["_HAS_NODISCARD"] = True
+ DEFINES["_SCL_SECURE_NO_DEPRECATE"] = True
+ DEFINES["_SECURE_ATL"] = True
+ DEFINES["_UNICODE"] = True
+ DEFINES["_WIN32_WINNT"] = "0x0A00"
+ DEFINES["_WINDOWS"] = True
+ DEFINES["__STD_C"] = True
+
+ OS_LIBS += [
+ "crypt32",
+ "iphlpapi",
+ "secur32",
+ "winmm"
+ ]
+
+if CONFIG["CPU_ARCH"] == "aarch64":
+
+ DEFINES["WEBRTC_ARCH_ARM64"] = True
+ DEFINES["WEBRTC_HAS_NEON"] = True
+
+if CONFIG["CPU_ARCH"] == "arm":
+
+ CXXFLAGS += [
+ "-mfpu=neon"
+ ]
+
+ DEFINES["WEBRTC_ARCH_ARM"] = True
+ DEFINES["WEBRTC_ARCH_ARM_V7"] = True
+ DEFINES["WEBRTC_HAS_NEON"] = True
+
+if CONFIG["CPU_ARCH"] == "mips32":
+
+ DEFINES["MIPS32_LE"] = True
+ DEFINES["MIPS_FPU_LE"] = True
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "mips64":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86":
+
+ DEFINES["WEBRTC_ENABLE_AVX2"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64":
+
+ DEFINES["WEBRTC_ENABLE_AVX2"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "OpenBSD":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
+
+ DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["USE_X11"] = "1"
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+ OS_LIBS += [
+ "android_support",
+ "unwind"
+ ]
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
+
+ CXXFLAGS += [
+ "-msse2"
+ ]
+
+ OS_LIBS += [
+ "android_support"
+ ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+ CXXFLAGS += [
+ "-msse2"
+ ]
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+Library("audio_gn")
diff --git a/third_party/libwebrtc/audio/audio_level.cc b/third_party/libwebrtc/audio/audio_level.cc
new file mode 100644
index 0000000000..7874b73f1c
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_level.cc
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_level.h"
+
+#include "api/audio/audio_frame.h"
+#include "common_audio/signal_processing/include/signal_processing_library.h"
+
+namespace webrtc {
+namespace voe {
+
+AudioLevel::AudioLevel()
+ : abs_max_(0), count_(0), current_level_full_range_(0) {}
+
+AudioLevel::~AudioLevel() {}
+
+void AudioLevel::Reset() {
+ MutexLock lock(&mutex_);
+ abs_max_ = 0;
+ count_ = 0;
+ current_level_full_range_ = 0;
+ total_energy_ = 0.0;
+ total_duration_ = 0.0;
+}
+
+int16_t AudioLevel::LevelFullRange() const {
+ MutexLock lock(&mutex_);
+ return current_level_full_range_;
+}
+
+void AudioLevel::ResetLevelFullRange() {
+ MutexLock lock(&mutex_);
+ abs_max_ = 0;
+ count_ = 0;
+ current_level_full_range_ = 0;
+}
+
+double AudioLevel::TotalEnergy() const {
+ MutexLock lock(&mutex_);
+ return total_energy_;
+}
+
+double AudioLevel::TotalDuration() const {
+ MutexLock lock(&mutex_);
+ return total_duration_;
+}
+
+void AudioLevel::ComputeLevel(const AudioFrame& audioFrame, double duration) {
+ // Check speech level (works for 2 channels as well)
+ int16_t abs_value =
+ audioFrame.muted()
+ ? 0
+ : WebRtcSpl_MaxAbsValueW16(
+ audioFrame.data(),
+ audioFrame.samples_per_channel_ * audioFrame.num_channels_);
+
+ // Protect member access using a lock since this method is called on a
+ // dedicated audio thread in the RecordedDataIsAvailable() callback.
+ MutexLock lock(&mutex_);
+
+ if (abs_value > abs_max_)
+ abs_max_ = abs_value;
+
+ // Update level approximately 9 times per second, assuming audio frame
+ // duration is approximately 10 ms. (The update frequency is every
+ // 11th (= |kUpdateFrequency+1|) call: 1000/(11*10)=9.09..., we should
+ // probably change this behavior, see https://crbug.com/webrtc/10784).
+ if (count_++ == kUpdateFrequency) {
+ current_level_full_range_ = abs_max_;
+
+ count_ = 0;
+
+ // Decay the absolute maximum (divide by 4)
+ abs_max_ >>= 2;
+ }
+
+ // See the description for "totalAudioEnergy" in the WebRTC stats spec
+ // (https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamtrackstats-totalaudioenergy)
+ // for an explanation of these formulas. In short, we need a value that can
+ // be used to compute RMS audio levels over different time intervals, by
+ // taking the difference between the results from two getStats calls. To do
+ // this, the value needs to be of units "squared sample value * time".
+ double additional_energy =
+ static_cast<double>(current_level_full_range_) / INT16_MAX;
+ additional_energy *= additional_energy;
+ total_energy_ += additional_energy * duration;
+ total_duration_ += duration;
+}
+
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_level.h b/third_party/libwebrtc/audio/audio_level.h
new file mode 100644
index 0000000000..acd1231fe2
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_level.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_AUDIO_LEVEL_H_
+#define AUDIO_AUDIO_LEVEL_H_
+
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace webrtc {
+
+class AudioFrame;
+namespace voe {
+
+// This class is thread-safe. However, TotalEnergy() and TotalDuration() are
+// related, so if you call ComputeLevel() on a different thread than you read
+// these values, you still need to use lock to read them as a pair.
+class AudioLevel {
+ public:
+ AudioLevel();
+ ~AudioLevel();
+ void Reset();
+
+ // Returns the current audio level linearly [0,32767], which gets updated
+ // every "kUpdateFrequency+1" call to ComputeLevel() based on the maximum
+ // audio level of any audio frame, decaying by a factor of 1/4 each time
+ // LevelFullRange() gets updated.
+ // Called on "API thread(s)" from APIs like VoEBase::CreateChannel(),
+ // VoEBase::StopSend().
+ int16_t LevelFullRange() const;
+ void ResetLevelFullRange();
+ // See the description for "totalAudioEnergy" in the WebRTC stats spec
+ // (https://w3c.github.io/webrtc-stats/#dom-rtcaudiohandlerstats-totalaudioenergy)
+ // In our implementation, the total audio energy increases by the
+ // energy-equivalent of LevelFullRange() at the time of ComputeLevel(), rather
+ // than the energy of the samples in that specific audio frame. As a result,
+ // we may report a higher audio energy and audio level than the spec mandates.
+ // TODO(https://crbug.com/webrtc/10784): We should either do what the spec
+ // says or update the spec to match our implementation. If we want to have a
+ // decaying audio level we should probably update both the spec and the
+ // implementation to reduce the complexity of the definition. If we want to
+ // continue to have decaying audio we should have unittests covering the
+ // behavior of the decay.
+ double TotalEnergy() const;
+ double TotalDuration() const;
+
+ // Called on a native capture audio thread (platform dependent) from the
+ // AudioTransport::RecordedDataIsAvailable() callback.
+ // In Chrome, this method is called on the AudioInputDevice thread.
+ void ComputeLevel(const AudioFrame& audioFrame, double duration);
+
+ private:
+ enum { kUpdateFrequency = 10 };
+
+ mutable Mutex mutex_;
+
+ int16_t abs_max_ RTC_GUARDED_BY(mutex_);
+ int16_t count_ RTC_GUARDED_BY(mutex_);
+ int16_t current_level_full_range_ RTC_GUARDED_BY(mutex_);
+
+ double total_energy_ RTC_GUARDED_BY(mutex_) = 0.0;
+ double total_duration_ RTC_GUARDED_BY(mutex_) = 0.0;
+};
+
+} // namespace voe
+} // namespace webrtc
+
+#endif // AUDIO_AUDIO_LEVEL_H_
diff --git a/third_party/libwebrtc/audio/audio_receive_stream.cc b/third_party/libwebrtc/audio/audio_receive_stream.cc
new file mode 100644
index 0000000000..20133e6dfe
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_receive_stream.cc
@@ -0,0 +1,497 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_receive_stream.h"
+
+#include <string>
+#include <utility>
+
+#include "absl/memory/memory.h"
+#include "api/array_view.h"
+#include "api/audio_codecs/audio_format.h"
+#include "api/call/audio_sink.h"
+#include "api/rtp_parameters.h"
+#include "api/sequence_checker.h"
+#include "audio/audio_send_stream.h"
+#include "audio/audio_state.h"
+#include "audio/channel_receive.h"
+#include "audio/conversion.h"
+#include "call/rtp_config.h"
+#include "call/rtp_stream_receiver_controller_interface.h"
+#include "modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/strings/string_builder.h"
+#include "rtc_base/time_utils.h"
+
+namespace webrtc {
+
+std::string AudioReceiveStreamInterface::Config::Rtp::ToString() const {
+ char ss_buf[1024];
+ rtc::SimpleStringBuilder ss(ss_buf);
+ ss << "{remote_ssrc: " << remote_ssrc;
+ ss << ", local_ssrc: " << local_ssrc;
+ ss << ", nack: " << nack.ToString();
+ ss << ", extensions: [";
+ for (size_t i = 0; i < extensions.size(); ++i) {
+ ss << extensions[i].ToString();
+ if (i != extensions.size() - 1) {
+ ss << ", ";
+ }
+ }
+ ss << ']';
+ ss << ", rtcp_event_observer: "
+ << (rtcp_event_observer ? "(rtcp_event_observer)" : "nullptr");
+ ss << '}';
+ return ss.str();
+}
+
+std::string AudioReceiveStreamInterface::Config::ToString() const {
+ char ss_buf[1024];
+ rtc::SimpleStringBuilder ss(ss_buf);
+ ss << "{rtp: " << rtp.ToString();
+ ss << ", rtcp_send_transport: "
+ << (rtcp_send_transport ? "(Transport)" : "null");
+ if (!sync_group.empty()) {
+ ss << ", sync_group: " << sync_group;
+ }
+ ss << '}';
+ return ss.str();
+}
+
+namespace {
+std::unique_ptr<voe::ChannelReceiveInterface> CreateChannelReceive(
+ Clock* clock,
+ webrtc::AudioState* audio_state,
+ NetEqFactory* neteq_factory,
+ const webrtc::AudioReceiveStreamInterface::Config& config,
+ RtcEventLog* event_log) {
+ RTC_DCHECK(audio_state);
+ internal::AudioState* internal_audio_state =
+ static_cast<internal::AudioState*>(audio_state);
+ return voe::CreateChannelReceive(
+ clock, neteq_factory, internal_audio_state->audio_device_module(),
+ config.rtcp_send_transport, event_log, config.rtp.local_ssrc,
+ config.rtp.remote_ssrc, config.jitter_buffer_max_packets,
+ config.jitter_buffer_fast_accelerate, config.jitter_buffer_min_delay_ms,
+ config.enable_non_sender_rtt, config.decoder_factory,
+ config.codec_pair_id, std::move(config.frame_decryptor),
+ config.crypto_options, std::move(config.frame_transformer),
+ config.rtp.rtcp_event_observer);
+}
+} // namespace
+
+AudioReceiveStreamImpl::AudioReceiveStreamImpl(
+ Clock* clock,
+ PacketRouter* packet_router,
+ NetEqFactory* neteq_factory,
+ const webrtc::AudioReceiveStreamInterface::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ webrtc::RtcEventLog* event_log)
+ : AudioReceiveStreamImpl(clock,
+ packet_router,
+ config,
+ audio_state,
+ event_log,
+ CreateChannelReceive(clock,
+ audio_state.get(),
+ neteq_factory,
+ config,
+ event_log)) {}
+
+AudioReceiveStreamImpl::AudioReceiveStreamImpl(
+ Clock* clock,
+ PacketRouter* packet_router,
+ const webrtc::AudioReceiveStreamInterface::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ webrtc::RtcEventLog* event_log,
+ std::unique_ptr<voe::ChannelReceiveInterface> channel_receive)
+ : config_(config),
+ audio_state_(audio_state),
+ source_tracker_(clock),
+ channel_receive_(std::move(channel_receive)) {
+ RTC_LOG(LS_INFO) << "AudioReceiveStreamImpl: " << config.rtp.remote_ssrc;
+ RTC_DCHECK(config.decoder_factory);
+ RTC_DCHECK(config.rtcp_send_transport);
+ RTC_DCHECK(audio_state_);
+ RTC_DCHECK(channel_receive_);
+
+ packet_sequence_checker_.Detach();
+
+ RTC_DCHECK(packet_router);
+ // Configure bandwidth estimation.
+ channel_receive_->RegisterReceiverCongestionControlObjects(packet_router);
+
+ // When output is muted, ChannelReceive will directly notify the source
+ // tracker of "delivered" frames, so RtpReceiver information will continue to
+ // be updated.
+ channel_receive_->SetSourceTracker(&source_tracker_);
+
+ // Complete configuration.
+ // TODO(solenberg): Config NACK history window (which is a packet count),
+ // using the actual packet size for the configured codec.
+ channel_receive_->SetNACKStatus(config.rtp.nack.rtp_history_ms != 0,
+ config.rtp.nack.rtp_history_ms / 20);
+ channel_receive_->SetReceiveCodecs(config.decoder_map);
+ // `frame_transformer` and `frame_decryptor` have been given to
+ // `channel_receive_` already.
+}
+
+AudioReceiveStreamImpl::~AudioReceiveStreamImpl() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_LOG(LS_INFO) << "~AudioReceiveStreamImpl: " << remote_ssrc();
+ Stop();
+ channel_receive_->SetAssociatedSendChannel(nullptr);
+ channel_receive_->ResetReceiverCongestionControlObjects();
+}
+
+void AudioReceiveStreamImpl::RegisterWithTransport(
+ RtpStreamReceiverControllerInterface* receiver_controller) {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ RTC_DCHECK(!rtp_stream_receiver_);
+ rtp_stream_receiver_ = receiver_controller->CreateReceiver(
+ remote_ssrc(), channel_receive_.get());
+}
+
+void AudioReceiveStreamImpl::UnregisterFromTransport() {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ rtp_stream_receiver_.reset();
+}
+
+void AudioReceiveStreamImpl::ReconfigureForTesting(
+ const webrtc::AudioReceiveStreamInterface::Config& config) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+
+ // SSRC can't be changed mid-stream.
+ RTC_DCHECK_EQ(remote_ssrc(), config.rtp.remote_ssrc);
+ RTC_DCHECK_EQ(local_ssrc(), config.rtp.local_ssrc);
+
+ // Configuration parameters which cannot be changed.
+ RTC_DCHECK_EQ(config_.rtcp_send_transport, config.rtcp_send_transport);
+ // Decoder factory cannot be changed because it is configured at
+ // voe::Channel construction time.
+ RTC_DCHECK_EQ(config_.decoder_factory, config.decoder_factory);
+
+ // TODO(solenberg): Config NACK history window (which is a packet count),
+ // using the actual packet size for the configured codec.
+ RTC_DCHECK_EQ(config_.rtp.nack.rtp_history_ms, config.rtp.nack.rtp_history_ms)
+ << "Use SetUseTransportCcAndNackHistory";
+
+ RTC_DCHECK(config_.decoder_map == config.decoder_map) << "Use SetDecoderMap";
+ RTC_DCHECK_EQ(config_.frame_transformer, config.frame_transformer)
+ << "Use SetDepacketizerToDecoderFrameTransformer";
+
+ config_ = config;
+}
+
+void AudioReceiveStreamImpl::Start() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (playing_) {
+ return;
+ }
+ channel_receive_->StartPlayout();
+ playing_ = true;
+ audio_state()->AddReceivingStream(this);
+}
+
+void AudioReceiveStreamImpl::Stop() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!playing_) {
+ return;
+ }
+ channel_receive_->StopPlayout();
+ playing_ = false;
+ audio_state()->RemoveReceivingStream(this);
+}
+
+bool AudioReceiveStreamImpl::IsRunning() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return playing_;
+}
+
+void AudioReceiveStreamImpl::SetDepacketizerToDecoderFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_receive_->SetDepacketizerToDecoderFrameTransformer(
+ std::move(frame_transformer));
+}
+
+void AudioReceiveStreamImpl::SetDecoderMap(
+ std::map<int, SdpAudioFormat> decoder_map) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ config_.decoder_map = std::move(decoder_map);
+ channel_receive_->SetReceiveCodecs(config_.decoder_map);
+}
+
+void AudioReceiveStreamImpl::SetNackHistory(int history_ms) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK_GE(history_ms, 0);
+
+ if (config_.rtp.nack.rtp_history_ms == history_ms)
+ return;
+
+ config_.rtp.nack.rtp_history_ms = history_ms;
+ // TODO(solenberg): Config NACK history window (which is a packet count),
+ // using the actual packet size for the configured codec.
+ channel_receive_->SetNACKStatus(history_ms != 0, history_ms / 20);
+}
+
+void AudioReceiveStreamImpl::SetNonSenderRttMeasurement(bool enabled) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ config_.enable_non_sender_rtt = enabled;
+ channel_receive_->SetNonSenderRttMeasurement(enabled);
+}
+
+void AudioReceiveStreamImpl::SetFrameDecryptor(
+ rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) {
+ // TODO(bugs.webrtc.org/11993): This is called via WebRtcAudioReceiveStream,
+ // expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_receive_->SetFrameDecryptor(std::move(frame_decryptor));
+}
+
+void AudioReceiveStreamImpl::SetRtpExtensions(
+ std::vector<RtpExtension> extensions) {
+ // TODO(bugs.webrtc.org/11993): This is called via WebRtcAudioReceiveStream,
+ // expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ config_.rtp.extensions = std::move(extensions);
+}
+
+RtpHeaderExtensionMap AudioReceiveStreamImpl::GetRtpExtensionMap() const {
+ return RtpHeaderExtensionMap(config_.rtp.extensions);
+}
+
+webrtc::AudioReceiveStreamInterface::Stats AudioReceiveStreamImpl::GetStats(
+ bool get_and_clear_legacy_stats) const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ webrtc::AudioReceiveStreamInterface::Stats stats;
+ stats.remote_ssrc = remote_ssrc();
+
+ webrtc::CallReceiveStatistics call_stats =
+ channel_receive_->GetRTCPStatistics();
+ // TODO(solenberg): Don't return here if we can't get the codec - return the
+ // stats we *can* get.
+ auto receive_codec = channel_receive_->GetReceiveCodec();
+ if (!receive_codec) {
+ return stats;
+ }
+
+ stats.payload_bytes_rcvd = call_stats.payload_bytes_rcvd;
+ stats.header_and_padding_bytes_rcvd =
+ call_stats.header_and_padding_bytes_rcvd;
+ stats.packets_rcvd = call_stats.packetsReceived;
+ stats.packets_lost = call_stats.cumulativeLost;
+ stats.nacks_sent = call_stats.nacks_sent;
+ stats.capture_start_ntp_time_ms = call_stats.capture_start_ntp_time_ms_;
+ stats.last_packet_received_timestamp_ms =
+ call_stats.last_packet_received_timestamp_ms;
+ stats.codec_name = receive_codec->second.name;
+ stats.codec_payload_type = receive_codec->first;
+ int clockrate_khz = receive_codec->second.clockrate_hz / 1000;
+ if (clockrate_khz > 0) {
+ stats.jitter_ms = call_stats.jitterSamples / clockrate_khz;
+ }
+ stats.delay_estimate_ms = channel_receive_->GetDelayEstimate();
+ stats.audio_level = channel_receive_->GetSpeechOutputLevelFullRange();
+ stats.total_output_energy = channel_receive_->GetTotalOutputEnergy();
+ stats.total_output_duration = channel_receive_->GetTotalOutputDuration();
+ stats.estimated_playout_ntp_timestamp_ms =
+ channel_receive_->GetCurrentEstimatedPlayoutNtpTimestampMs(
+ rtc::TimeMillis());
+
+ // Get jitter buffer and total delay (alg + jitter + playout) stats.
+ auto ns = channel_receive_->GetNetworkStatistics(get_and_clear_legacy_stats);
+ stats.packets_discarded = ns.packetsDiscarded;
+ stats.fec_packets_received = ns.fecPacketsReceived;
+ stats.fec_packets_discarded = ns.fecPacketsDiscarded;
+ stats.jitter_buffer_ms = ns.currentBufferSize;
+ stats.jitter_buffer_preferred_ms = ns.preferredBufferSize;
+ stats.total_samples_received = ns.totalSamplesReceived;
+ stats.concealed_samples = ns.concealedSamples;
+ stats.silent_concealed_samples = ns.silentConcealedSamples;
+ stats.concealment_events = ns.concealmentEvents;
+ stats.jitter_buffer_delay_seconds =
+ static_cast<double>(ns.jitterBufferDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec);
+ stats.jitter_buffer_emitted_count = ns.jitterBufferEmittedCount;
+ stats.jitter_buffer_target_delay_seconds =
+ static_cast<double>(ns.jitterBufferTargetDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec);
+ stats.jitter_buffer_minimum_delay_seconds =
+ static_cast<double>(ns.jitterBufferMinimumDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec);
+ stats.inserted_samples_for_deceleration = ns.insertedSamplesForDeceleration;
+ stats.removed_samples_for_acceleration = ns.removedSamplesForAcceleration;
+ stats.expand_rate = Q14ToFloat(ns.currentExpandRate);
+ stats.speech_expand_rate = Q14ToFloat(ns.currentSpeechExpandRate);
+ stats.secondary_decoded_rate = Q14ToFloat(ns.currentSecondaryDecodedRate);
+ stats.secondary_discarded_rate = Q14ToFloat(ns.currentSecondaryDiscardedRate);
+ stats.accelerate_rate = Q14ToFloat(ns.currentAccelerateRate);
+ stats.preemptive_expand_rate = Q14ToFloat(ns.currentPreemptiveRate);
+ stats.jitter_buffer_flushes = ns.packetBufferFlushes;
+ stats.delayed_packet_outage_samples = ns.delayedPacketOutageSamples;
+ stats.relative_packet_arrival_delay_seconds =
+ static_cast<double>(ns.relativePacketArrivalDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec);
+ stats.interruption_count = ns.interruptionCount;
+ stats.total_interruption_duration_ms = ns.totalInterruptionDurationMs;
+
+ auto ds = channel_receive_->GetDecodingCallStatistics();
+ stats.decoding_calls_to_silence_generator = ds.calls_to_silence_generator;
+ stats.decoding_calls_to_neteq = ds.calls_to_neteq;
+ stats.decoding_normal = ds.decoded_normal;
+ stats.decoding_plc = ds.decoded_neteq_plc;
+ stats.decoding_codec_plc = ds.decoded_codec_plc;
+ stats.decoding_cng = ds.decoded_cng;
+ stats.decoding_plc_cng = ds.decoded_plc_cng;
+ stats.decoding_muted_output = ds.decoded_muted_output;
+
+ stats.last_sender_report_timestamp_ms =
+ call_stats.last_sender_report_timestamp_ms;
+ stats.last_sender_report_remote_timestamp_ms =
+ call_stats.last_sender_report_remote_timestamp_ms;
+ stats.sender_reports_packets_sent = call_stats.sender_reports_packets_sent;
+ stats.sender_reports_bytes_sent = call_stats.sender_reports_bytes_sent;
+ stats.sender_reports_reports_count = call_stats.sender_reports_reports_count;
+ stats.round_trip_time = call_stats.round_trip_time;
+ stats.round_trip_time_measurements = call_stats.round_trip_time_measurements;
+ stats.total_round_trip_time = call_stats.total_round_trip_time;
+
+ return stats;
+}
+
+void AudioReceiveStreamImpl::SetSink(AudioSinkInterface* sink) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_receive_->SetSink(sink);
+}
+
+void AudioReceiveStreamImpl::SetGain(float gain) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_receive_->SetChannelOutputVolumeScaling(gain);
+}
+
+bool AudioReceiveStreamImpl::SetBaseMinimumPlayoutDelayMs(int delay_ms) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return channel_receive_->SetBaseMinimumPlayoutDelayMs(delay_ms);
+}
+
+int AudioReceiveStreamImpl::GetBaseMinimumPlayoutDelayMs() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return channel_receive_->GetBaseMinimumPlayoutDelayMs();
+}
+
+std::vector<RtpSource> AudioReceiveStreamImpl::GetSources() const {
+ return source_tracker_.GetSources();
+}
+
+AudioMixer::Source::AudioFrameInfo
+AudioReceiveStreamImpl::GetAudioFrameWithInfo(int sample_rate_hz,
+ AudioFrame* audio_frame) {
+ AudioMixer::Source::AudioFrameInfo audio_frame_info =
+ channel_receive_->GetAudioFrameWithInfo(sample_rate_hz, audio_frame);
+ if (audio_frame_info != AudioMixer::Source::AudioFrameInfo::kError) {
+ source_tracker_.OnFrameDelivered(audio_frame->packet_infos_);
+ }
+ return audio_frame_info;
+}
+
+int AudioReceiveStreamImpl::Ssrc() const {
+ return remote_ssrc();
+}
+
+int AudioReceiveStreamImpl::PreferredSampleRate() const {
+ return channel_receive_->PreferredSampleRate();
+}
+
+uint32_t AudioReceiveStreamImpl::id() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return remote_ssrc();
+}
+
+absl::optional<Syncable::Info> AudioReceiveStreamImpl::GetInfo() const {
+ // TODO(bugs.webrtc.org/11993): This is called via RtpStreamsSynchronizer,
+ // expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return channel_receive_->GetSyncInfo();
+}
+
+bool AudioReceiveStreamImpl::GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
+ int64_t* time_ms) const {
+ // Called on video capture thread.
+ return channel_receive_->GetPlayoutRtpTimestamp(rtp_timestamp, time_ms);
+}
+
+void AudioReceiveStreamImpl::SetEstimatedPlayoutNtpTimestampMs(
+ int64_t ntp_timestamp_ms,
+ int64_t time_ms) {
+ // Called on video capture thread.
+ channel_receive_->SetEstimatedPlayoutNtpTimestampMs(ntp_timestamp_ms,
+ time_ms);
+}
+
+bool AudioReceiveStreamImpl::SetMinimumPlayoutDelay(int delay_ms) {
+ // TODO(bugs.webrtc.org/11993): This is called via RtpStreamsSynchronizer,
+ // expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return channel_receive_->SetMinimumPlayoutDelay(delay_ms);
+}
+
+void AudioReceiveStreamImpl::AssociateSendStream(
+ internal::AudioSendStream* send_stream) {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ channel_receive_->SetAssociatedSendChannel(
+ send_stream ? send_stream->GetChannel() : nullptr);
+ associated_send_stream_ = send_stream;
+}
+
+void AudioReceiveStreamImpl::DeliverRtcp(const uint8_t* packet, size_t length) {
+ // TODO(solenberg): Tests call this function on a network thread, libjingle
+ // calls on the worker thread. We should move towards always using a network
+ // thread. Then this check can be enabled.
+ // RTC_DCHECK(!thread_checker_.IsCurrent());
+ channel_receive_->ReceivedRTCPPacket(packet, length);
+}
+
+void AudioReceiveStreamImpl::SetSyncGroup(absl::string_view sync_group) {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ config_.sync_group = std::string(sync_group);
+}
+
+void AudioReceiveStreamImpl::SetLocalSsrc(uint32_t local_ssrc) {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ // TODO(tommi): Consider storing local_ssrc in one place.
+ config_.rtp.local_ssrc = local_ssrc;
+ channel_receive_->OnLocalSsrcChange(local_ssrc);
+}
+
+uint32_t AudioReceiveStreamImpl::local_ssrc() const {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ RTC_DCHECK_EQ(config_.rtp.local_ssrc, channel_receive_->GetLocalSsrc());
+ return config_.rtp.local_ssrc;
+}
+
+const std::string& AudioReceiveStreamImpl::sync_group() const {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ return config_.sync_group;
+}
+
+const AudioSendStream*
+AudioReceiveStreamImpl::GetAssociatedSendStreamForTesting() const {
+ RTC_DCHECK_RUN_ON(&packet_sequence_checker_);
+ return associated_send_stream_;
+}
+
+internal::AudioState* AudioReceiveStreamImpl::audio_state() const {
+ auto* audio_state = static_cast<internal::AudioState*>(audio_state_.get());
+ RTC_DCHECK(audio_state);
+ return audio_state;
+}
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_receive_stream.h b/third_party/libwebrtc/audio/audio_receive_stream.h
new file mode 100644
index 0000000000..51514fb6ce
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_receive_stream.h
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_AUDIO_RECEIVE_STREAM_H_
+#define AUDIO_AUDIO_RECEIVE_STREAM_H_
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "api/audio/audio_mixer.h"
+#include "api/neteq/neteq_factory.h"
+#include "api/rtp_headers.h"
+#include "api/sequence_checker.h"
+#include "audio/audio_state.h"
+#include "call/audio_receive_stream.h"
+#include "call/syncable.h"
+#include "modules/rtp_rtcp/source/source_tracker.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "system_wrappers/include/clock.h"
+
+namespace webrtc {
+class PacketRouter;
+class RtcEventLog;
+class RtpStreamReceiverControllerInterface;
+class RtpStreamReceiverInterface;
+
+namespace voe {
+class ChannelReceiveInterface;
+} // namespace voe
+
+namespace internal {
+class AudioSendStream;
+} // namespace internal
+
+class AudioReceiveStreamImpl final : public webrtc::AudioReceiveStreamInterface,
+ public AudioMixer::Source,
+ public Syncable {
+ public:
+ AudioReceiveStreamImpl(
+ Clock* clock,
+ PacketRouter* packet_router,
+ NetEqFactory* neteq_factory,
+ const webrtc::AudioReceiveStreamInterface::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ webrtc::RtcEventLog* event_log);
+ // For unit tests, which need to supply a mock channel receive.
+ AudioReceiveStreamImpl(
+ Clock* clock,
+ PacketRouter* packet_router,
+ const webrtc::AudioReceiveStreamInterface::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ webrtc::RtcEventLog* event_log,
+ std::unique_ptr<voe::ChannelReceiveInterface> channel_receive);
+
+ AudioReceiveStreamImpl() = delete;
+ AudioReceiveStreamImpl(const AudioReceiveStreamImpl&) = delete;
+ AudioReceiveStreamImpl& operator=(const AudioReceiveStreamImpl&) = delete;
+
+ // Destruction happens on the worker thread. Prior to destruction the caller
+ // must ensure that a registration with the transport has been cleared. See
+ // `RegisterWithTransport` for details.
+ // TODO(tommi): As a further improvement to this, performing the full
+ // destruction on the network thread could be made the default.
+ ~AudioReceiveStreamImpl() override;
+
+ // Called on the network thread to register/unregister with the network
+ // transport.
+ void RegisterWithTransport(
+ RtpStreamReceiverControllerInterface* receiver_controller);
+ // If registration has previously been done (via `RegisterWithTransport`) then
+ // `UnregisterFromTransport` must be called prior to destruction, on the
+ // network thread.
+ void UnregisterFromTransport();
+
+ // webrtc::AudioReceiveStreamInterface implementation.
+ void Start() override;
+ void Stop() override;
+ bool IsRunning() const override;
+ void SetDepacketizerToDecoderFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer)
+ override;
+ void SetDecoderMap(std::map<int, SdpAudioFormat> decoder_map) override;
+ void SetNackHistory(int history_ms) override;
+ void SetNonSenderRttMeasurement(bool enabled) override;
+ void SetFrameDecryptor(rtc::scoped_refptr<webrtc::FrameDecryptorInterface>
+ frame_decryptor) override;
+ void SetRtpExtensions(std::vector<RtpExtension> extensions) override;
+ RtpHeaderExtensionMap GetRtpExtensionMap() const override;
+
+ webrtc::AudioReceiveStreamInterface::Stats GetStats(
+ bool get_and_clear_legacy_stats) const override;
+ void SetSink(AudioSinkInterface* sink) override;
+ void SetGain(float gain) override;
+ bool SetBaseMinimumPlayoutDelayMs(int delay_ms) override;
+ int GetBaseMinimumPlayoutDelayMs() const override;
+ std::vector<webrtc::RtpSource> GetSources() const override;
+
+ // AudioMixer::Source
+ AudioFrameInfo GetAudioFrameWithInfo(int sample_rate_hz,
+ AudioFrame* audio_frame) override;
+ int Ssrc() const override;
+ int PreferredSampleRate() const override;
+
+ // Syncable
+ uint32_t id() const override;
+ absl::optional<Syncable::Info> GetInfo() const override;
+ bool GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
+ int64_t* time_ms) const override;
+ void SetEstimatedPlayoutNtpTimestampMs(int64_t ntp_timestamp_ms,
+ int64_t time_ms) override;
+ bool SetMinimumPlayoutDelay(int delay_ms) override;
+
+ void AssociateSendStream(internal::AudioSendStream* send_stream);
+ void DeliverRtcp(const uint8_t* packet, size_t length);
+
+ void SetSyncGroup(absl::string_view sync_group);
+
+ void SetLocalSsrc(uint32_t local_ssrc);
+
+ uint32_t local_ssrc() const;
+
+ uint32_t remote_ssrc() const override {
+ // The remote_ssrc member variable of config_ will never change and can be
+ // considered const.
+ return config_.rtp.remote_ssrc;
+ }
+
+ // Returns a reference to the currently set sync group of the stream.
+ // Must be called on the packet delivery thread.
+ const std::string& sync_group() const;
+
+ const AudioSendStream* GetAssociatedSendStreamForTesting() const;
+
+ // TODO(tommi): Remove this method.
+ void ReconfigureForTesting(
+ const webrtc::AudioReceiveStreamInterface::Config& config);
+
+ private:
+ internal::AudioState* audio_state() const;
+
+ RTC_NO_UNIQUE_ADDRESS SequenceChecker worker_thread_checker_;
+ // TODO(bugs.webrtc.org/11993): This checker conceptually represents
+ // operations that belong to the network thread. The Call class is currently
+ // moving towards handling network packets on the network thread and while
+ // that work is ongoing, this checker may in practice represent the worker
+ // thread, but still serves as a mechanism of grouping together concepts
+ // that belong to the network thread. Once the packets are fully delivered
+ // on the network thread, this comment will be deleted.
+ RTC_NO_UNIQUE_ADDRESS SequenceChecker packet_sequence_checker_;
+ webrtc::AudioReceiveStreamInterface::Config config_;
+ rtc::scoped_refptr<webrtc::AudioState> audio_state_;
+ SourceTracker source_tracker_;
+ const std::unique_ptr<voe::ChannelReceiveInterface> channel_receive_;
+ AudioSendStream* associated_send_stream_
+ RTC_GUARDED_BY(packet_sequence_checker_) = nullptr;
+
+ bool playing_ RTC_GUARDED_BY(worker_thread_checker_) = false;
+
+ std::unique_ptr<RtpStreamReceiverInterface> rtp_stream_receiver_
+ RTC_GUARDED_BY(packet_sequence_checker_);
+};
+} // namespace webrtc
+
+#endif // AUDIO_AUDIO_RECEIVE_STREAM_H_
diff --git a/third_party/libwebrtc/audio/audio_receive_stream_unittest.cc b/third_party/libwebrtc/audio/audio_receive_stream_unittest.cc
new file mode 100644
index 0000000000..2cee6a4bae
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_receive_stream_unittest.cc
@@ -0,0 +1,439 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_receive_stream.h"
+
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/test/mock_audio_mixer.h"
+#include "api/test/mock_frame_decryptor.h"
+#include "audio/conversion.h"
+#include "audio/mock_voe_channel_proxy.h"
+#include "call/rtp_stream_receiver_controller.h"
+#include "logging/rtc_event_log/mock/mock_rtc_event_log.h"
+#include "modules/audio_device/include/mock_audio_device.h"
+#include "modules/audio_processing/include/mock_audio_processing.h"
+#include "modules/pacing/packet_router.h"
+#include "modules/rtp_rtcp/source/byte_io.h"
+#include "rtc_base/time_utils.h"
+#include "test/gtest.h"
+#include "test/mock_audio_decoder_factory.h"
+#include "test/mock_transport.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+using ::testing::_;
+using ::testing::FloatEq;
+using ::testing::NiceMock;
+using ::testing::Return;
+
+AudioDecodingCallStats MakeAudioDecodeStatsForTest() {
+ AudioDecodingCallStats audio_decode_stats;
+ audio_decode_stats.calls_to_silence_generator = 234;
+ audio_decode_stats.calls_to_neteq = 567;
+ audio_decode_stats.decoded_normal = 890;
+ audio_decode_stats.decoded_neteq_plc = 123;
+ audio_decode_stats.decoded_codec_plc = 124;
+ audio_decode_stats.decoded_cng = 456;
+ audio_decode_stats.decoded_plc_cng = 789;
+ audio_decode_stats.decoded_muted_output = 987;
+ return audio_decode_stats;
+}
+
+const uint32_t kRemoteSsrc = 1234;
+const uint32_t kLocalSsrc = 5678;
+const int kAudioLevelId = 3;
+const int kTransportSequenceNumberId = 4;
+const int kJitterBufferDelay = -7;
+const int kPlayoutBufferDelay = 302;
+const unsigned int kSpeechOutputLevel = 99;
+const double kTotalOutputEnergy = 0.25;
+const double kTotalOutputDuration = 0.5;
+const int64_t kPlayoutNtpTimestampMs = 5678;
+
+const CallReceiveStatistics kCallStats = {678, 234, -12, 567, 78, 890, 123};
+const std::pair<int, SdpAudioFormat> kReceiveCodec = {
+ 123,
+ {"codec_name_recv", 96000, 0}};
+const NetworkStatistics kNetworkStats = {
+ /*currentBufferSize=*/123,
+ /*preferredBufferSize=*/456,
+ /*jitterPeaksFound=*/false,
+ /*totalSamplesReceived=*/789012,
+ /*concealedSamples=*/3456,
+ /*silentConcealedSamples=*/123,
+ /*concealmentEvents=*/456,
+ /*jitterBufferDelayMs=*/789,
+ /*jitterBufferEmittedCount=*/543,
+ /*jitterBufferTargetDelayMs=*/123,
+ /*jitterBufferMinimumDelayMs=*/222,
+ /*insertedSamplesForDeceleration=*/432,
+ /*removedSamplesForAcceleration=*/321,
+ /*fecPacketsReceived=*/123,
+ /*fecPacketsDiscarded=*/101,
+ /*packetsDiscarded=*/989,
+ /*currentExpandRate=*/789,
+ /*currentSpeechExpandRate=*/12,
+ /*currentPreemptiveRate=*/345,
+ /*currentAccelerateRate =*/678,
+ /*currentSecondaryDecodedRate=*/901,
+ /*currentSecondaryDiscardedRate=*/0,
+ /*meanWaitingTimeMs=*/-1,
+ /*maxWaitingTimeMs=*/-1,
+ /*packetBufferFlushes=*/0,
+ /*delayedPacketOutageSamples=*/0,
+ /*relativePacketArrivalDelayMs=*/135,
+ /*interruptionCount=*/-1,
+ /*totalInterruptionDurationMs=*/-1};
+const AudioDecodingCallStats kAudioDecodeStats = MakeAudioDecodeStatsForTest();
+
+struct ConfigHelper {
+ explicit ConfigHelper(bool use_null_audio_processing)
+ : ConfigHelper(rtc::make_ref_counted<MockAudioMixer>(),
+ use_null_audio_processing) {}
+
+ ConfigHelper(rtc::scoped_refptr<MockAudioMixer> audio_mixer,
+ bool use_null_audio_processing)
+ : audio_mixer_(audio_mixer) {
+ using ::testing::Invoke;
+
+ AudioState::Config config;
+ config.audio_mixer = audio_mixer_;
+ config.audio_processing =
+ use_null_audio_processing
+ ? nullptr
+ : rtc::make_ref_counted<NiceMock<MockAudioProcessing>>();
+ config.audio_device_module =
+ rtc::make_ref_counted<testing::NiceMock<MockAudioDeviceModule>>();
+ audio_state_ = AudioState::Create(config);
+
+ channel_receive_ = new ::testing::StrictMock<MockChannelReceive>();
+ EXPECT_CALL(*channel_receive_, SetNACKStatus(true, 15)).Times(1);
+ EXPECT_CALL(*channel_receive_,
+ RegisterReceiverCongestionControlObjects(&packet_router_))
+ .Times(1);
+ EXPECT_CALL(*channel_receive_, ResetReceiverCongestionControlObjects())
+ .Times(1);
+ EXPECT_CALL(*channel_receive_, SetAssociatedSendChannel(nullptr)).Times(1);
+ EXPECT_CALL(*channel_receive_, SetReceiveCodecs(_))
+ .WillRepeatedly(Invoke([](const std::map<int, SdpAudioFormat>& codecs) {
+ EXPECT_THAT(codecs, ::testing::IsEmpty());
+ }));
+ EXPECT_CALL(*channel_receive_, SetSourceTracker(_));
+ EXPECT_CALL(*channel_receive_, GetLocalSsrc())
+ .WillRepeatedly(Return(kLocalSsrc));
+
+ stream_config_.rtp.local_ssrc = kLocalSsrc;
+ stream_config_.rtp.remote_ssrc = kRemoteSsrc;
+ stream_config_.rtp.nack.rtp_history_ms = 300;
+ stream_config_.rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelId));
+ stream_config_.rtp.extensions.push_back(RtpExtension(
+ RtpExtension::kTransportSequenceNumberUri, kTransportSequenceNumberId));
+ stream_config_.rtcp_send_transport = &rtcp_send_transport_;
+ stream_config_.decoder_factory =
+ rtc::make_ref_counted<MockAudioDecoderFactory>();
+ }
+
+ std::unique_ptr<AudioReceiveStreamImpl> CreateAudioReceiveStream() {
+ auto ret = std::make_unique<AudioReceiveStreamImpl>(
+ Clock::GetRealTimeClock(), &packet_router_, stream_config_,
+ audio_state_, &event_log_,
+ std::unique_ptr<voe::ChannelReceiveInterface>(channel_receive_));
+ ret->RegisterWithTransport(&rtp_stream_receiver_controller_);
+ return ret;
+ }
+
+ AudioReceiveStreamInterface::Config& config() { return stream_config_; }
+ rtc::scoped_refptr<MockAudioMixer> audio_mixer() { return audio_mixer_; }
+ MockChannelReceive* channel_receive() { return channel_receive_; }
+
+ void SetupMockForGetStats() {
+ using ::testing::DoAll;
+ using ::testing::SetArgPointee;
+
+ ASSERT_TRUE(channel_receive_);
+ EXPECT_CALL(*channel_receive_, GetRTCPStatistics())
+ .WillOnce(Return(kCallStats));
+ EXPECT_CALL(*channel_receive_, GetDelayEstimate())
+ .WillOnce(Return(kJitterBufferDelay + kPlayoutBufferDelay));
+ EXPECT_CALL(*channel_receive_, GetSpeechOutputLevelFullRange())
+ .WillOnce(Return(kSpeechOutputLevel));
+ EXPECT_CALL(*channel_receive_, GetTotalOutputEnergy())
+ .WillOnce(Return(kTotalOutputEnergy));
+ EXPECT_CALL(*channel_receive_, GetTotalOutputDuration())
+ .WillOnce(Return(kTotalOutputDuration));
+ EXPECT_CALL(*channel_receive_, GetNetworkStatistics(_))
+ .WillOnce(Return(kNetworkStats));
+ EXPECT_CALL(*channel_receive_, GetDecodingCallStatistics())
+ .WillOnce(Return(kAudioDecodeStats));
+ EXPECT_CALL(*channel_receive_, GetReceiveCodec())
+ .WillOnce(Return(kReceiveCodec));
+ EXPECT_CALL(*channel_receive_, GetCurrentEstimatedPlayoutNtpTimestampMs(_))
+ .WillOnce(Return(kPlayoutNtpTimestampMs));
+ }
+
+ private:
+ PacketRouter packet_router_;
+ MockRtcEventLog event_log_;
+ rtc::scoped_refptr<AudioState> audio_state_;
+ rtc::scoped_refptr<MockAudioMixer> audio_mixer_;
+ AudioReceiveStreamInterface::Config stream_config_;
+ ::testing::StrictMock<MockChannelReceive>* channel_receive_ = nullptr;
+ RtpStreamReceiverController rtp_stream_receiver_controller_;
+ MockTransport rtcp_send_transport_;
+};
+
+const std::vector<uint8_t> CreateRtcpSenderReport() {
+ std::vector<uint8_t> packet;
+ const size_t kRtcpSrLength = 28; // In bytes.
+ packet.resize(kRtcpSrLength);
+ packet[0] = 0x80; // Version 2.
+ packet[1] = 0xc8; // PT = 200, SR.
+ // Length in number of 32-bit words - 1.
+ ByteWriter<uint16_t>::WriteBigEndian(&packet[2], 6);
+ ByteWriter<uint32_t>::WriteBigEndian(&packet[4], kLocalSsrc);
+ return packet;
+}
+} // namespace
+
+TEST(AudioReceiveStreamTest, ConfigToString) {
+ AudioReceiveStreamInterface::Config config;
+ config.rtp.remote_ssrc = kRemoteSsrc;
+ config.rtp.local_ssrc = kLocalSsrc;
+ config.rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelId));
+ EXPECT_EQ(
+ "{rtp: {remote_ssrc: 1234, local_ssrc: 5678, nack: "
+ "{rtp_history_ms: 0}, extensions: [{uri: "
+ "urn:ietf:params:rtp-hdrext:ssrc-audio-level, id: 3}]}, "
+ "rtcp_send_transport: null}",
+ config.ToString());
+}
+
+TEST(AudioReceiveStreamTest, ConstructDestruct) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(use_null_audio_processing);
+ auto recv_stream = helper.CreateAudioReceiveStream();
+ recv_stream->UnregisterFromTransport();
+ }
+}
+
+TEST(AudioReceiveStreamTest, ReceiveRtcpPacket) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(use_null_audio_processing);
+ auto recv_stream = helper.CreateAudioReceiveStream();
+ std::vector<uint8_t> rtcp_packet = CreateRtcpSenderReport();
+ EXPECT_CALL(*helper.channel_receive(),
+ ReceivedRTCPPacket(&rtcp_packet[0], rtcp_packet.size()))
+ .WillOnce(Return());
+ recv_stream->DeliverRtcp(&rtcp_packet[0], rtcp_packet.size());
+ recv_stream->UnregisterFromTransport();
+ }
+}
+
+TEST(AudioReceiveStreamTest, GetStats) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(use_null_audio_processing);
+ auto recv_stream = helper.CreateAudioReceiveStream();
+ helper.SetupMockForGetStats();
+ AudioReceiveStreamInterface::Stats stats =
+ recv_stream->GetStats(/*get_and_clear_legacy_stats=*/true);
+ EXPECT_EQ(kRemoteSsrc, stats.remote_ssrc);
+ EXPECT_EQ(kCallStats.payload_bytes_rcvd, stats.payload_bytes_rcvd);
+ EXPECT_EQ(kCallStats.header_and_padding_bytes_rcvd,
+ stats.header_and_padding_bytes_rcvd);
+ EXPECT_EQ(static_cast<uint32_t>(kCallStats.packetsReceived),
+ stats.packets_rcvd);
+ EXPECT_EQ(kCallStats.cumulativeLost, stats.packets_lost);
+ EXPECT_EQ(kReceiveCodec.second.name, stats.codec_name);
+ EXPECT_EQ(
+ kCallStats.jitterSamples / (kReceiveCodec.second.clockrate_hz / 1000),
+ stats.jitter_ms);
+ EXPECT_EQ(kNetworkStats.currentBufferSize, stats.jitter_buffer_ms);
+ EXPECT_EQ(kNetworkStats.preferredBufferSize,
+ stats.jitter_buffer_preferred_ms);
+ EXPECT_EQ(static_cast<uint32_t>(kJitterBufferDelay + kPlayoutBufferDelay),
+ stats.delay_estimate_ms);
+ EXPECT_EQ(static_cast<int32_t>(kSpeechOutputLevel), stats.audio_level);
+ EXPECT_EQ(kTotalOutputEnergy, stats.total_output_energy);
+ EXPECT_EQ(kNetworkStats.totalSamplesReceived, stats.total_samples_received);
+ EXPECT_EQ(kTotalOutputDuration, stats.total_output_duration);
+ EXPECT_EQ(kNetworkStats.concealedSamples, stats.concealed_samples);
+ EXPECT_EQ(kNetworkStats.concealmentEvents, stats.concealment_events);
+ EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec),
+ stats.jitter_buffer_delay_seconds);
+ EXPECT_EQ(kNetworkStats.jitterBufferEmittedCount,
+ stats.jitter_buffer_emitted_count);
+ EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferTargetDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec),
+ stats.jitter_buffer_target_delay_seconds);
+ EXPECT_EQ(static_cast<double>(kNetworkStats.jitterBufferMinimumDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec),
+ stats.jitter_buffer_minimum_delay_seconds);
+ EXPECT_EQ(kNetworkStats.insertedSamplesForDeceleration,
+ stats.inserted_samples_for_deceleration);
+ EXPECT_EQ(kNetworkStats.removedSamplesForAcceleration,
+ stats.removed_samples_for_acceleration);
+ EXPECT_EQ(kNetworkStats.fecPacketsReceived, stats.fec_packets_received);
+ EXPECT_EQ(kNetworkStats.fecPacketsDiscarded, stats.fec_packets_discarded);
+ EXPECT_EQ(kNetworkStats.packetsDiscarded, stats.packets_discarded);
+ EXPECT_EQ(Q14ToFloat(kNetworkStats.currentExpandRate), stats.expand_rate);
+ EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSpeechExpandRate),
+ stats.speech_expand_rate);
+ EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSecondaryDecodedRate),
+ stats.secondary_decoded_rate);
+ EXPECT_EQ(Q14ToFloat(kNetworkStats.currentSecondaryDiscardedRate),
+ stats.secondary_discarded_rate);
+ EXPECT_EQ(Q14ToFloat(kNetworkStats.currentAccelerateRate),
+ stats.accelerate_rate);
+ EXPECT_EQ(Q14ToFloat(kNetworkStats.currentPreemptiveRate),
+ stats.preemptive_expand_rate);
+ EXPECT_EQ(kNetworkStats.packetBufferFlushes, stats.jitter_buffer_flushes);
+ EXPECT_EQ(kNetworkStats.delayedPacketOutageSamples,
+ stats.delayed_packet_outage_samples);
+ EXPECT_EQ(static_cast<double>(kNetworkStats.relativePacketArrivalDelayMs) /
+ static_cast<double>(rtc::kNumMillisecsPerSec),
+ stats.relative_packet_arrival_delay_seconds);
+ EXPECT_EQ(kNetworkStats.interruptionCount, stats.interruption_count);
+ EXPECT_EQ(kNetworkStats.totalInterruptionDurationMs,
+ stats.total_interruption_duration_ms);
+
+ EXPECT_EQ(kAudioDecodeStats.calls_to_silence_generator,
+ stats.decoding_calls_to_silence_generator);
+ EXPECT_EQ(kAudioDecodeStats.calls_to_neteq, stats.decoding_calls_to_neteq);
+ EXPECT_EQ(kAudioDecodeStats.decoded_normal, stats.decoding_normal);
+ EXPECT_EQ(kAudioDecodeStats.decoded_neteq_plc, stats.decoding_plc);
+ EXPECT_EQ(kAudioDecodeStats.decoded_codec_plc, stats.decoding_codec_plc);
+ EXPECT_EQ(kAudioDecodeStats.decoded_cng, stats.decoding_cng);
+ EXPECT_EQ(kAudioDecodeStats.decoded_plc_cng, stats.decoding_plc_cng);
+ EXPECT_EQ(kAudioDecodeStats.decoded_muted_output,
+ stats.decoding_muted_output);
+ EXPECT_EQ(kCallStats.capture_start_ntp_time_ms_,
+ stats.capture_start_ntp_time_ms);
+ EXPECT_EQ(kPlayoutNtpTimestampMs, stats.estimated_playout_ntp_timestamp_ms);
+ recv_stream->UnregisterFromTransport();
+ }
+}
+
+TEST(AudioReceiveStreamTest, SetGain) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(use_null_audio_processing);
+ auto recv_stream = helper.CreateAudioReceiveStream();
+ EXPECT_CALL(*helper.channel_receive(),
+ SetChannelOutputVolumeScaling(FloatEq(0.765f)));
+ recv_stream->SetGain(0.765f);
+ recv_stream->UnregisterFromTransport();
+ }
+}
+
+TEST(AudioReceiveStreamTest, StreamsShouldBeAddedToMixerOnceOnStart) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper1(use_null_audio_processing);
+ ConfigHelper helper2(helper1.audio_mixer(), use_null_audio_processing);
+ auto recv_stream1 = helper1.CreateAudioReceiveStream();
+ auto recv_stream2 = helper2.CreateAudioReceiveStream();
+
+ EXPECT_CALL(*helper1.channel_receive(), StartPlayout()).Times(1);
+ EXPECT_CALL(*helper2.channel_receive(), StartPlayout()).Times(1);
+ EXPECT_CALL(*helper1.channel_receive(), StopPlayout()).Times(1);
+ EXPECT_CALL(*helper2.channel_receive(), StopPlayout()).Times(1);
+ EXPECT_CALL(*helper1.audio_mixer(), AddSource(recv_stream1.get()))
+ .WillOnce(Return(true));
+ EXPECT_CALL(*helper1.audio_mixer(), AddSource(recv_stream2.get()))
+ .WillOnce(Return(true));
+ EXPECT_CALL(*helper1.audio_mixer(), RemoveSource(recv_stream1.get()))
+ .Times(1);
+ EXPECT_CALL(*helper1.audio_mixer(), RemoveSource(recv_stream2.get()))
+ .Times(1);
+
+ recv_stream1->Start();
+ recv_stream2->Start();
+
+ // One more should not result in any more mixer sources added.
+ recv_stream1->Start();
+
+ // Stop stream before it is being destructed.
+ recv_stream2->Stop();
+
+ recv_stream1->UnregisterFromTransport();
+ recv_stream2->UnregisterFromTransport();
+ }
+}
+
+TEST(AudioReceiveStreamTest, ReconfigureWithUpdatedConfig) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(use_null_audio_processing);
+ auto recv_stream = helper.CreateAudioReceiveStream();
+
+ auto new_config = helper.config();
+
+ new_config.rtp.extensions.clear();
+ new_config.rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelId + 1));
+ new_config.rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kTransportSequenceNumberUri,
+ kTransportSequenceNumberId + 1));
+
+ MockChannelReceive& channel_receive = *helper.channel_receive();
+
+ // TODO(tommi, nisse): This applies new extensions to the internal config,
+ // but there's nothing that actually verifies that the changes take effect.
+ // In fact Call manages the extensions separately in Call::ReceiveRtpConfig
+ // and changing this config value (there seem to be a few copies), doesn't
+ // affect that logic.
+ recv_stream->ReconfigureForTesting(new_config);
+
+ new_config.decoder_map.emplace(1, SdpAudioFormat("foo", 8000, 1));
+ EXPECT_CALL(channel_receive, SetReceiveCodecs(new_config.decoder_map));
+ recv_stream->SetDecoderMap(new_config.decoder_map);
+
+ EXPECT_CALL(channel_receive, SetNACKStatus(true, 15 + 1)).Times(1);
+ recv_stream->SetNackHistory(300 + 20);
+
+ recv_stream->UnregisterFromTransport();
+ }
+}
+
+TEST(AudioReceiveStreamTest, ReconfigureWithFrameDecryptor) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(use_null_audio_processing);
+ auto recv_stream = helper.CreateAudioReceiveStream();
+
+ auto new_config_0 = helper.config();
+ rtc::scoped_refptr<FrameDecryptorInterface> mock_frame_decryptor_0(
+ rtc::make_ref_counted<MockFrameDecryptor>());
+ new_config_0.frame_decryptor = mock_frame_decryptor_0;
+
+ // TODO(tommi): While this changes the internal config value, it doesn't
+ // actually change what frame_decryptor is used. WebRtcAudioReceiveStream
+ // recreates the whole instance in order to change this value.
+ // So, it's not clear if changing this post initialization needs to be
+ // supported.
+ recv_stream->ReconfigureForTesting(new_config_0);
+
+ auto new_config_1 = helper.config();
+ rtc::scoped_refptr<FrameDecryptorInterface> mock_frame_decryptor_1(
+ rtc::make_ref_counted<MockFrameDecryptor>());
+ new_config_1.frame_decryptor = mock_frame_decryptor_1;
+ new_config_1.crypto_options.sframe.require_frame_encryption = true;
+ recv_stream->ReconfigureForTesting(new_config_1);
+ recv_stream->UnregisterFromTransport();
+ }
+}
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_send_stream.cc b/third_party/libwebrtc/audio/audio_send_stream.cc
new file mode 100644
index 0000000000..20af3f7722
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_send_stream.cc
@@ -0,0 +1,941 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_send_stream.h"
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/audio_codecs/audio_encoder.h"
+#include "api/audio_codecs/audio_encoder_factory.h"
+#include "api/audio_codecs/audio_format.h"
+#include "api/call/transport.h"
+#include "api/crypto/frame_encryptor_interface.h"
+#include "api/function_view.h"
+#include "api/rtc_event_log/rtc_event_log.h"
+#include "api/task_queue/task_queue_base.h"
+#include "audio/audio_state.h"
+#include "audio/channel_send.h"
+#include "audio/conversion.h"
+#include "call/rtp_config.h"
+#include "call/rtp_transport_controller_send_interface.h"
+#include "common_audio/vad/include/vad.h"
+#include "logging/rtc_event_log/events/rtc_event_audio_send_stream_config.h"
+#include "logging/rtc_event_log/rtc_stream_config.h"
+#include "media/base/media_channel.h"
+#include "modules/audio_coding/codecs/cng/audio_encoder_cng.h"
+#include "modules/audio_coding/codecs/red/audio_encoder_copy_red.h"
+#include "modules/audio_processing/include/audio_processing.h"
+#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/strings/audio_format_to_string.h"
+#include "rtc_base/trace_event.h"
+
+namespace webrtc {
+namespace {
+
+void UpdateEventLogStreamConfig(RtcEventLog* event_log,
+ const AudioSendStream::Config& config,
+ const AudioSendStream::Config* old_config) {
+ using SendCodecSpec = AudioSendStream::Config::SendCodecSpec;
+ // Only update if any of the things we log have changed.
+ auto payload_types_equal = [](const absl::optional<SendCodecSpec>& a,
+ const absl::optional<SendCodecSpec>& b) {
+ if (a.has_value() && b.has_value()) {
+ return a->format.name == b->format.name &&
+ a->payload_type == b->payload_type;
+ }
+ return !a.has_value() && !b.has_value();
+ };
+
+ if (old_config && config.rtp.ssrc == old_config->rtp.ssrc &&
+ config.rtp.extensions == old_config->rtp.extensions &&
+ payload_types_equal(config.send_codec_spec,
+ old_config->send_codec_spec)) {
+ return;
+ }
+
+ auto rtclog_config = std::make_unique<rtclog::StreamConfig>();
+ rtclog_config->local_ssrc = config.rtp.ssrc;
+ rtclog_config->rtp_extensions = config.rtp.extensions;
+ if (config.send_codec_spec) {
+ rtclog_config->codecs.emplace_back(config.send_codec_spec->format.name,
+ config.send_codec_spec->payload_type, 0);
+ }
+ event_log->Log(std::make_unique<RtcEventAudioSendStreamConfig>(
+ std::move(rtclog_config)));
+}
+
+} // namespace
+
+constexpr char AudioAllocationConfig::kKey[];
+
+std::unique_ptr<StructParametersParser> AudioAllocationConfig::Parser() {
+ return StructParametersParser::Create( //
+ "min", &min_bitrate, //
+ "max", &max_bitrate, //
+ "prio_rate", &priority_bitrate, //
+ "prio_rate_raw", &priority_bitrate_raw, //
+ "rate_prio", &bitrate_priority);
+}
+
+AudioAllocationConfig::AudioAllocationConfig(
+ const FieldTrialsView& field_trials) {
+ Parser()->Parse(field_trials.Lookup(kKey));
+ if (priority_bitrate_raw && !priority_bitrate.IsZero()) {
+ RTC_LOG(LS_WARNING) << "'priority_bitrate' and '_raw' are mutually "
+ "exclusive but both were configured.";
+ }
+}
+
+namespace internal {
+AudioSendStream::AudioSendStream(
+ Clock* clock,
+ const webrtc::AudioSendStream::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ TaskQueueFactory* task_queue_factory,
+ RtpTransportControllerSendInterface* rtp_transport,
+ BitrateAllocatorInterface* bitrate_allocator,
+ RtcEventLog* event_log,
+ RtcpRttStats* rtcp_rtt_stats,
+ const absl::optional<RtpState>& suspended_rtp_state,
+ const FieldTrialsView& field_trials)
+ : AudioSendStream(
+ clock,
+ config,
+ audio_state,
+ task_queue_factory,
+ rtp_transport,
+ bitrate_allocator,
+ event_log,
+ suspended_rtp_state,
+ voe::CreateChannelSend(clock,
+ task_queue_factory,
+ config.send_transport,
+ rtcp_rtt_stats,
+ event_log,
+ config.frame_encryptor.get(),
+ config.crypto_options,
+ config.rtp.extmap_allow_mixed,
+ config.rtcp_report_interval_ms,
+ config.rtp.ssrc,
+ config.frame_transformer,
+ rtp_transport->transport_feedback_observer(),
+ field_trials),
+ field_trials) {}
+
+AudioSendStream::AudioSendStream(
+ Clock* clock,
+ const webrtc::AudioSendStream::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ TaskQueueFactory* task_queue_factory,
+ RtpTransportControllerSendInterface* rtp_transport,
+ BitrateAllocatorInterface* bitrate_allocator,
+ RtcEventLog* event_log,
+ const absl::optional<RtpState>& suspended_rtp_state,
+ std::unique_ptr<voe::ChannelSendInterface> channel_send,
+ const FieldTrialsView& field_trials)
+ : clock_(clock),
+ field_trials_(field_trials),
+ rtp_transport_queue_(rtp_transport->GetWorkerQueue()),
+ allocate_audio_without_feedback_(
+ field_trials_.IsEnabled("WebRTC-Audio-ABWENoTWCC")),
+ enable_audio_alr_probing_(
+ !field_trials_.IsDisabled("WebRTC-Audio-AlrProbing")),
+ allocation_settings_(field_trials_),
+ config_(Config(/*send_transport=*/nullptr)),
+ audio_state_(audio_state),
+ channel_send_(std::move(channel_send)),
+ event_log_(event_log),
+ use_legacy_overhead_calculation_(
+ field_trials_.IsEnabled("WebRTC-Audio-LegacyOverhead")),
+ bitrate_allocator_(bitrate_allocator),
+ rtp_transport_(rtp_transport),
+ rtp_rtcp_module_(channel_send_->GetRtpRtcp()),
+ suspended_rtp_state_(suspended_rtp_state) {
+ RTC_LOG(LS_INFO) << "AudioSendStream: " << config.rtp.ssrc;
+ RTC_DCHECK(rtp_transport_queue_);
+ RTC_DCHECK(audio_state_);
+ RTC_DCHECK(channel_send_);
+ RTC_DCHECK(bitrate_allocator_);
+ RTC_DCHECK(rtp_transport);
+
+ RTC_DCHECK(rtp_rtcp_module_);
+
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ ConfigureStream(config, true, nullptr);
+ UpdateCachedTargetAudioBitrateConstraints();
+}
+
+AudioSendStream::~AudioSendStream() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_LOG(LS_INFO) << "~AudioSendStream: " << config_.rtp.ssrc;
+ RTC_DCHECK(!sending_);
+ channel_send_->ResetSenderCongestionControlObjects();
+
+ // Blocking call to synchronize state with worker queue to ensure that there
+ // are no pending tasks left that keeps references to audio.
+ rtp_transport_queue_->RunSynchronous([] {});
+}
+
+const webrtc::AudioSendStream::Config& AudioSendStream::GetConfig() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return config_;
+}
+
+void AudioSendStream::Reconfigure(
+ const webrtc::AudioSendStream::Config& new_config,
+ SetParametersCallback callback) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ ConfigureStream(new_config, false, std::move(callback));
+}
+
+AudioSendStream::ExtensionIds AudioSendStream::FindExtensionIds(
+ const std::vector<RtpExtension>& extensions) {
+ ExtensionIds ids;
+ for (const auto& extension : extensions) {
+ if (extension.uri == RtpExtension::kAudioLevelUri) {
+ ids.audio_level = extension.id;
+ } else if (extension.uri == RtpExtension::kAbsSendTimeUri) {
+ ids.abs_send_time = extension.id;
+ } else if (extension.uri == RtpExtension::kTransportSequenceNumberUri) {
+ ids.transport_sequence_number = extension.id;
+ } else if (extension.uri == RtpExtension::kMidUri) {
+ ids.mid = extension.id;
+ } else if (extension.uri == RtpExtension::kRidUri) {
+ ids.rid = extension.id;
+ } else if (extension.uri == RtpExtension::kRepairedRidUri) {
+ ids.repaired_rid = extension.id;
+ } else if (extension.uri == RtpExtension::kAbsoluteCaptureTimeUri) {
+ ids.abs_capture_time = extension.id;
+ }
+ }
+ return ids;
+}
+
+int AudioSendStream::TransportSeqNumId(const AudioSendStream::Config& config) {
+ return FindExtensionIds(config.rtp.extensions).transport_sequence_number;
+}
+
+void AudioSendStream::ConfigureStream(
+ const webrtc::AudioSendStream::Config& new_config,
+ bool first_time,
+ SetParametersCallback callback) {
+ RTC_LOG(LS_INFO) << "AudioSendStream::ConfigureStream: "
+ << new_config.ToString();
+ UpdateEventLogStreamConfig(event_log_, new_config,
+ first_time ? nullptr : &config_);
+
+ const auto& old_config = config_;
+
+ // Configuration parameters which cannot be changed.
+ RTC_DCHECK(first_time ||
+ old_config.send_transport == new_config.send_transport);
+ RTC_DCHECK(first_time || old_config.rtp.ssrc == new_config.rtp.ssrc);
+ if (suspended_rtp_state_ && first_time) {
+ rtp_rtcp_module_->SetRtpState(*suspended_rtp_state_);
+ }
+ if (first_time || old_config.rtp.c_name != new_config.rtp.c_name) {
+ channel_send_->SetRTCP_CNAME(new_config.rtp.c_name);
+ }
+
+ // Enable the frame encryptor if a new frame encryptor has been provided.
+ if (first_time || new_config.frame_encryptor != old_config.frame_encryptor) {
+ channel_send_->SetFrameEncryptor(new_config.frame_encryptor);
+ }
+
+ if (first_time ||
+ new_config.frame_transformer != old_config.frame_transformer) {
+ channel_send_->SetEncoderToPacketizerFrameTransformer(
+ new_config.frame_transformer);
+ }
+
+ if (first_time ||
+ new_config.rtp.extmap_allow_mixed != old_config.rtp.extmap_allow_mixed) {
+ rtp_rtcp_module_->SetExtmapAllowMixed(new_config.rtp.extmap_allow_mixed);
+ }
+
+ const ExtensionIds old_ids = FindExtensionIds(old_config.rtp.extensions);
+ const ExtensionIds new_ids = FindExtensionIds(new_config.rtp.extensions);
+
+ // Audio level indication
+ if (first_time || new_ids.audio_level != old_ids.audio_level) {
+ channel_send_->SetSendAudioLevelIndicationStatus(new_ids.audio_level != 0,
+ new_ids.audio_level);
+ }
+
+ if (first_time || new_ids.abs_send_time != old_ids.abs_send_time) {
+ absl::string_view uri = AbsoluteSendTime::Uri();
+ rtp_rtcp_module_->DeregisterSendRtpHeaderExtension(uri);
+ if (new_ids.abs_send_time) {
+ rtp_rtcp_module_->RegisterRtpHeaderExtension(uri, new_ids.abs_send_time);
+ }
+ }
+
+ bool transport_seq_num_id_changed =
+ new_ids.transport_sequence_number != old_ids.transport_sequence_number;
+ if (first_time ||
+ (transport_seq_num_id_changed && !allocate_audio_without_feedback_)) {
+ if (!first_time) {
+ channel_send_->ResetSenderCongestionControlObjects();
+ }
+
+ RtcpBandwidthObserver* bandwidth_observer = nullptr;
+
+ if (!allocate_audio_without_feedback_ &&
+ new_ids.transport_sequence_number != 0) {
+ rtp_rtcp_module_->RegisterRtpHeaderExtension(
+ TransportSequenceNumber::Uri(), new_ids.transport_sequence_number);
+ // Probing in application limited region is only used in combination with
+ // send side congestion control, wich depends on feedback packets which
+ // requires transport sequence numbers to be enabled.
+ // Optionally request ALR probing but do not override any existing
+ // request from other streams.
+ if (enable_audio_alr_probing_) {
+ rtp_transport_->EnablePeriodicAlrProbing(true);
+ }
+ bandwidth_observer = rtp_transport_->GetBandwidthObserver();
+ }
+ channel_send_->RegisterSenderCongestionControlObjects(rtp_transport_,
+ bandwidth_observer);
+ }
+ // MID RTP header extension.
+ if ((first_time || new_ids.mid != old_ids.mid ||
+ new_config.rtp.mid != old_config.rtp.mid) &&
+ new_ids.mid != 0 && !new_config.rtp.mid.empty()) {
+ rtp_rtcp_module_->RegisterRtpHeaderExtension(RtpMid::Uri(), new_ids.mid);
+ rtp_rtcp_module_->SetMid(new_config.rtp.mid);
+ }
+
+ if (first_time || new_ids.abs_capture_time != old_ids.abs_capture_time) {
+ absl::string_view uri = AbsoluteCaptureTimeExtension::Uri();
+ rtp_rtcp_module_->DeregisterSendRtpHeaderExtension(uri);
+ if (new_ids.abs_capture_time) {
+ rtp_rtcp_module_->RegisterRtpHeaderExtension(uri,
+ new_ids.abs_capture_time);
+ }
+ }
+
+ if (!ReconfigureSendCodec(new_config)) {
+ RTC_LOG(LS_ERROR) << "Failed to set up send codec state.";
+
+ webrtc::InvokeSetParametersCallback(
+ callback, webrtc::RTCError(webrtc::RTCErrorType::INTERNAL_ERROR,
+ "Failed to set up send codec state."));
+ }
+
+ // Set currently known overhead (used in ANA, opus only).
+ {
+ MutexLock lock(&overhead_per_packet_lock_);
+ UpdateOverheadForEncoder();
+ }
+
+ channel_send_->CallEncoder([this](AudioEncoder* encoder) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!encoder) {
+ return;
+ }
+ frame_length_range_ = encoder->GetFrameLengthRange();
+ UpdateCachedTargetAudioBitrateConstraints();
+ });
+
+ if (sending_) {
+ ReconfigureBitrateObserver(new_config);
+ }
+
+ config_ = new_config;
+ if (!first_time) {
+ UpdateCachedTargetAudioBitrateConstraints();
+ }
+
+ webrtc::InvokeSetParametersCallback(callback, webrtc::RTCError::OK());
+}
+
+void AudioSendStream::Start() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (sending_) {
+ return;
+ }
+ if (!config_.has_dscp && config_.min_bitrate_bps != -1 &&
+ config_.max_bitrate_bps != -1 &&
+ (allocate_audio_without_feedback_ || TransportSeqNumId(config_) != 0)) {
+ rtp_transport_->AccountForAudioPacketsInPacedSender(true);
+ rtp_transport_->IncludeOverheadInPacedSender();
+ rtp_rtcp_module_->SetAsPartOfAllocation(true);
+ ConfigureBitrateObserver();
+ } else {
+ rtp_rtcp_module_->SetAsPartOfAllocation(false);
+ }
+ channel_send_->StartSend();
+ sending_ = true;
+ audio_state()->AddSendingStream(this, encoder_sample_rate_hz_,
+ encoder_num_channels_);
+}
+
+void AudioSendStream::Stop() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!sending_) {
+ return;
+ }
+
+ RemoveBitrateObserver();
+ channel_send_->StopSend();
+ sending_ = false;
+ audio_state()->RemoveSendingStream(this);
+}
+
+void AudioSendStream::SendAudioData(std::unique_ptr<AudioFrame> audio_frame) {
+ RTC_CHECK_RUNS_SERIALIZED(&audio_capture_race_checker_);
+ RTC_DCHECK_GT(audio_frame->sample_rate_hz_, 0);
+ TRACE_EVENT0("webrtc", "AudioSendStream::SendAudioData");
+ double duration = static_cast<double>(audio_frame->samples_per_channel_) /
+ audio_frame->sample_rate_hz_;
+ {
+ // Note: SendAudioData() passes the frame further down the pipeline and it
+ // may eventually get sent. But this method is invoked even if we are not
+ // connected, as long as we have an AudioSendStream (created as a result of
+ // an O/A exchange). This means that we are calculating audio levels whether
+ // or not we are sending samples.
+ // TODO(https://crbug.com/webrtc/10771): All "media-source" related stats
+ // should move from send-streams to the local audio sources or tracks; a
+ // send-stream should not be required to read the microphone audio levels.
+ MutexLock lock(&audio_level_lock_);
+ audio_level_.ComputeLevel(*audio_frame, duration);
+ }
+ channel_send_->ProcessAndEncodeAudio(std::move(audio_frame));
+}
+
+bool AudioSendStream::SendTelephoneEvent(int payload_type,
+ int payload_frequency,
+ int event,
+ int duration_ms) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_send_->SetSendTelephoneEventPayloadType(payload_type,
+ payload_frequency);
+ return channel_send_->SendTelephoneEventOutband(event, duration_ms);
+}
+
+void AudioSendStream::SetMuted(bool muted) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_send_->SetInputMute(muted);
+}
+
+webrtc::AudioSendStream::Stats AudioSendStream::GetStats() const {
+ return GetStats(true);
+}
+
+webrtc::AudioSendStream::Stats AudioSendStream::GetStats(
+ bool has_remote_tracks) const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ webrtc::AudioSendStream::Stats stats;
+ stats.local_ssrc = config_.rtp.ssrc;
+ stats.target_bitrate_bps = channel_send_->GetTargetBitrate();
+
+ webrtc::CallSendStatistics call_stats = channel_send_->GetRTCPStatistics();
+ stats.rtcp_packet_type_counts = call_stats.rtcp_packet_type_counts;
+ stats.payload_bytes_sent = call_stats.payload_bytes_sent;
+ stats.header_and_padding_bytes_sent =
+ call_stats.header_and_padding_bytes_sent;
+ stats.retransmitted_bytes_sent = call_stats.retransmitted_bytes_sent;
+ stats.packets_sent = call_stats.packetsSent;
+ stats.total_packet_send_delay = call_stats.total_packet_send_delay;
+ stats.retransmitted_packets_sent = call_stats.retransmitted_packets_sent;
+ // RTT isn't known until a RTCP report is received. Until then, VoiceEngine
+ // returns 0 to indicate an error value.
+ if (call_stats.rttMs > 0) {
+ stats.rtt_ms = call_stats.rttMs;
+ }
+ if (config_.send_codec_spec) {
+ const auto& spec = *config_.send_codec_spec;
+ stats.codec_name = spec.format.name;
+ stats.codec_payload_type = spec.payload_type;
+
+ // Get data from the last remote RTCP report.
+ for (const auto& block : channel_send_->GetRemoteRTCPReportBlocks()) {
+ // Lookup report for send ssrc only.
+ if (block.source_SSRC == stats.local_ssrc) {
+ stats.packets_lost = block.cumulative_num_packets_lost;
+ stats.fraction_lost = Q8ToFloat(block.fraction_lost);
+ // Convert timestamps to milliseconds.
+ if (spec.format.clockrate_hz / 1000 > 0) {
+ stats.jitter_ms =
+ block.interarrival_jitter / (spec.format.clockrate_hz / 1000);
+ }
+ break;
+ }
+ }
+ }
+
+ {
+ MutexLock lock(&audio_level_lock_);
+ stats.audio_level = audio_level_.LevelFullRange();
+ stats.total_input_energy = audio_level_.TotalEnergy();
+ stats.total_input_duration = audio_level_.TotalDuration();
+ }
+
+ stats.ana_statistics = channel_send_->GetANAStatistics();
+
+ AudioProcessing* ap = audio_state_->audio_processing();
+ if (ap) {
+ stats.apm_statistics = ap->GetStatistics(has_remote_tracks);
+ }
+
+ stats.report_block_datas = std::move(call_stats.report_block_datas);
+
+ stats.nacks_rcvd = call_stats.nacks_rcvd;
+
+ return stats;
+}
+
+void AudioSendStream::DeliverRtcp(const uint8_t* packet, size_t length) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ channel_send_->ReceivedRTCPPacket(packet, length);
+
+ {
+ // Poll if overhead has changed, which it can do if ack triggers us to stop
+ // sending mid/rid.
+ MutexLock lock(&overhead_per_packet_lock_);
+ UpdateOverheadForEncoder();
+ }
+ UpdateCachedTargetAudioBitrateConstraints();
+}
+
+uint32_t AudioSendStream::OnBitrateUpdated(BitrateAllocationUpdate update) {
+ RTC_DCHECK_RUN_ON(rtp_transport_queue_);
+
+ // Pick a target bitrate between the constraints. Overrules the allocator if
+ // it 1) allocated a bitrate of zero to disable the stream or 2) allocated a
+ // higher than max to allow for e.g. extra FEC.
+ RTC_DCHECK(cached_constraints_.has_value());
+ update.target_bitrate.Clamp(cached_constraints_->min,
+ cached_constraints_->max);
+ update.stable_target_bitrate.Clamp(cached_constraints_->min,
+ cached_constraints_->max);
+
+ channel_send_->OnBitrateAllocation(update);
+
+ // The amount of audio protection is not exposed by the encoder, hence
+ // always returning 0.
+ return 0;
+}
+
+void AudioSendStream::SetTransportOverhead(
+ int transport_overhead_per_packet_bytes) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ {
+ MutexLock lock(&overhead_per_packet_lock_);
+ transport_overhead_per_packet_bytes_ = transport_overhead_per_packet_bytes;
+ UpdateOverheadForEncoder();
+ }
+ UpdateCachedTargetAudioBitrateConstraints();
+}
+
+void AudioSendStream::UpdateOverheadForEncoder() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ size_t overhead_per_packet_bytes = GetPerPacketOverheadBytes();
+ if (overhead_per_packet_ == overhead_per_packet_bytes) {
+ return;
+ }
+ overhead_per_packet_ = overhead_per_packet_bytes;
+
+ channel_send_->CallEncoder([&](AudioEncoder* encoder) {
+ encoder->OnReceivedOverhead(overhead_per_packet_bytes);
+ });
+ if (total_packet_overhead_bytes_ != overhead_per_packet_bytes) {
+ total_packet_overhead_bytes_ = overhead_per_packet_bytes;
+ if (registered_with_allocator_) {
+ ConfigureBitrateObserver();
+ }
+ }
+}
+
+size_t AudioSendStream::TestOnlyGetPerPacketOverheadBytes() const {
+ MutexLock lock(&overhead_per_packet_lock_);
+ return GetPerPacketOverheadBytes();
+}
+
+size_t AudioSendStream::GetPerPacketOverheadBytes() const {
+ return transport_overhead_per_packet_bytes_ +
+ rtp_rtcp_module_->ExpectedPerPacketOverhead();
+}
+
+RtpState AudioSendStream::GetRtpState() const {
+ return rtp_rtcp_module_->GetRtpState();
+}
+
+const voe::ChannelSendInterface* AudioSendStream::GetChannel() const {
+ return channel_send_.get();
+}
+
+internal::AudioState* AudioSendStream::audio_state() {
+ internal::AudioState* audio_state =
+ static_cast<internal::AudioState*>(audio_state_.get());
+ RTC_DCHECK(audio_state);
+ return audio_state;
+}
+
+const internal::AudioState* AudioSendStream::audio_state() const {
+ internal::AudioState* audio_state =
+ static_cast<internal::AudioState*>(audio_state_.get());
+ RTC_DCHECK(audio_state);
+ return audio_state;
+}
+
+void AudioSendStream::StoreEncoderProperties(int sample_rate_hz,
+ size_t num_channels) {
+ encoder_sample_rate_hz_ = sample_rate_hz;
+ encoder_num_channels_ = num_channels;
+ if (sending_) {
+ // Update AudioState's information about the stream.
+ audio_state()->AddSendingStream(this, sample_rate_hz, num_channels);
+ }
+}
+
+// Apply current codec settings to a single voe::Channel used for sending.
+bool AudioSendStream::SetupSendCodec(const Config& new_config) {
+ RTC_DCHECK(new_config.send_codec_spec);
+ const auto& spec = *new_config.send_codec_spec;
+
+ RTC_DCHECK(new_config.encoder_factory);
+ std::unique_ptr<AudioEncoder> encoder =
+ new_config.encoder_factory->MakeAudioEncoder(
+ spec.payload_type, spec.format, new_config.codec_pair_id);
+
+ if (!encoder) {
+ RTC_DLOG(LS_ERROR) << "Unable to create encoder for "
+ << rtc::ToString(spec.format);
+ return false;
+ }
+
+ // If a bitrate has been specified for the codec, use it over the
+ // codec's default.
+ if (spec.target_bitrate_bps) {
+ encoder->OnReceivedTargetAudioBitrate(*spec.target_bitrate_bps);
+ }
+
+ // Enable ANA if configured (currently only used by Opus).
+ if (new_config.audio_network_adaptor_config) {
+ if (encoder->EnableAudioNetworkAdaptor(
+ *new_config.audio_network_adaptor_config, event_log_)) {
+ RTC_LOG(LS_INFO) << "Audio network adaptor enabled on SSRC "
+ << new_config.rtp.ssrc;
+ } else {
+ RTC_LOG(LS_INFO) << "Failed to enable Audio network adaptor on SSRC "
+ << new_config.rtp.ssrc;
+ }
+ }
+
+ // Wrap the encoder in an AudioEncoderCNG, if VAD is enabled.
+ if (spec.cng_payload_type) {
+ AudioEncoderCngConfig cng_config;
+ cng_config.num_channels = encoder->NumChannels();
+ cng_config.payload_type = *spec.cng_payload_type;
+ cng_config.speech_encoder = std::move(encoder);
+ cng_config.vad_mode = Vad::kVadNormal;
+ encoder = CreateComfortNoiseEncoder(std::move(cng_config));
+
+ RegisterCngPayloadType(*spec.cng_payload_type,
+ new_config.send_codec_spec->format.clockrate_hz);
+ }
+
+ // Wrap the encoder in a RED encoder, if RED is enabled.
+ if (spec.red_payload_type) {
+ AudioEncoderCopyRed::Config red_config;
+ red_config.payload_type = *spec.red_payload_type;
+ red_config.speech_encoder = std::move(encoder);
+ encoder = std::make_unique<AudioEncoderCopyRed>(std::move(red_config),
+ field_trials_);
+ }
+
+ // Set currently known overhead (used in ANA, opus only).
+ // If overhead changes later, it will be updated in UpdateOverheadForEncoder.
+ {
+ MutexLock lock(&overhead_per_packet_lock_);
+ size_t overhead = GetPerPacketOverheadBytes();
+ if (overhead > 0) {
+ encoder->OnReceivedOverhead(overhead);
+ }
+ }
+
+ StoreEncoderProperties(encoder->SampleRateHz(), encoder->NumChannels());
+ channel_send_->SetEncoder(new_config.send_codec_spec->payload_type,
+ std::move(encoder));
+
+ return true;
+}
+
+bool AudioSendStream::ReconfigureSendCodec(const Config& new_config) {
+ const auto& old_config = config_;
+
+ if (!new_config.send_codec_spec) {
+ // We cannot de-configure a send codec. So we will do nothing.
+ // By design, the send codec should have not been configured.
+ RTC_DCHECK(!old_config.send_codec_spec);
+ return true;
+ }
+
+ if (new_config.send_codec_spec == old_config.send_codec_spec &&
+ new_config.audio_network_adaptor_config ==
+ old_config.audio_network_adaptor_config) {
+ return true;
+ }
+
+ // If we have no encoder, or the format or payload type's changed, create a
+ // new encoder.
+ if (!old_config.send_codec_spec ||
+ new_config.send_codec_spec->format !=
+ old_config.send_codec_spec->format ||
+ new_config.send_codec_spec->payload_type !=
+ old_config.send_codec_spec->payload_type ||
+ new_config.send_codec_spec->red_payload_type !=
+ old_config.send_codec_spec->red_payload_type) {
+ return SetupSendCodec(new_config);
+ }
+
+ const absl::optional<int>& new_target_bitrate_bps =
+ new_config.send_codec_spec->target_bitrate_bps;
+ // If a bitrate has been specified for the codec, use it over the
+ // codec's default.
+ if (new_target_bitrate_bps &&
+ new_target_bitrate_bps !=
+ old_config.send_codec_spec->target_bitrate_bps) {
+ channel_send_->CallEncoder([&](AudioEncoder* encoder) {
+ encoder->OnReceivedTargetAudioBitrate(*new_target_bitrate_bps);
+ });
+ }
+
+ ReconfigureANA(new_config);
+ ReconfigureCNG(new_config);
+
+ return true;
+}
+
+void AudioSendStream::ReconfigureANA(const Config& new_config) {
+ if (new_config.audio_network_adaptor_config ==
+ config_.audio_network_adaptor_config) {
+ return;
+ }
+ if (new_config.audio_network_adaptor_config) {
+ // This lock needs to be acquired before CallEncoder, since it aquires
+ // another lock and we need to maintain the same order at all call sites to
+ // avoid deadlock.
+ MutexLock lock(&overhead_per_packet_lock_);
+ size_t overhead = GetPerPacketOverheadBytes();
+ channel_send_->CallEncoder([&](AudioEncoder* encoder) {
+ if (encoder->EnableAudioNetworkAdaptor(
+ *new_config.audio_network_adaptor_config, event_log_)) {
+ RTC_LOG(LS_INFO) << "Audio network adaptor enabled on SSRC "
+ << new_config.rtp.ssrc;
+ if (overhead > 0) {
+ encoder->OnReceivedOverhead(overhead);
+ }
+ } else {
+ RTC_LOG(LS_INFO) << "Failed to enable Audio network adaptor on SSRC "
+ << new_config.rtp.ssrc;
+ }
+ });
+ } else {
+ channel_send_->CallEncoder(
+ [&](AudioEncoder* encoder) { encoder->DisableAudioNetworkAdaptor(); });
+ RTC_LOG(LS_INFO) << "Audio network adaptor disabled on SSRC "
+ << new_config.rtp.ssrc;
+ }
+}
+
+void AudioSendStream::ReconfigureCNG(const Config& new_config) {
+ if (new_config.send_codec_spec->cng_payload_type ==
+ config_.send_codec_spec->cng_payload_type) {
+ return;
+ }
+
+ // Register the CNG payload type if it's been added, don't do anything if CNG
+ // is removed. Payload types must not be redefined.
+ if (new_config.send_codec_spec->cng_payload_type) {
+ RegisterCngPayloadType(*new_config.send_codec_spec->cng_payload_type,
+ new_config.send_codec_spec->format.clockrate_hz);
+ }
+
+ // Wrap or unwrap the encoder in an AudioEncoderCNG.
+ channel_send_->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* encoder_ptr) {
+ std::unique_ptr<AudioEncoder> old_encoder(std::move(*encoder_ptr));
+ auto sub_encoders = old_encoder->ReclaimContainedEncoders();
+ if (!sub_encoders.empty()) {
+ // Replace enc with its sub encoder. We need to put the sub
+ // encoder in a temporary first, since otherwise the old value
+ // of enc would be destroyed before the new value got assigned,
+ // which would be bad since the new value is a part of the old
+ // value.
+ auto tmp = std::move(sub_encoders[0]);
+ old_encoder = std::move(tmp);
+ }
+ if (new_config.send_codec_spec->cng_payload_type) {
+ AudioEncoderCngConfig config;
+ config.speech_encoder = std::move(old_encoder);
+ config.num_channels = config.speech_encoder->NumChannels();
+ config.payload_type = *new_config.send_codec_spec->cng_payload_type;
+ config.vad_mode = Vad::kVadNormal;
+ *encoder_ptr = CreateComfortNoiseEncoder(std::move(config));
+ } else {
+ *encoder_ptr = std::move(old_encoder);
+ }
+ });
+}
+
+void AudioSendStream::ReconfigureBitrateObserver(
+ const webrtc::AudioSendStream::Config& new_config) {
+ // Since the Config's default is for both of these to be -1, this test will
+ // allow us to configure the bitrate observer if the new config has bitrate
+ // limits set, but would only have us call RemoveBitrateObserver if we were
+ // previously configured with bitrate limits.
+ if (config_.min_bitrate_bps == new_config.min_bitrate_bps &&
+ config_.max_bitrate_bps == new_config.max_bitrate_bps &&
+ config_.bitrate_priority == new_config.bitrate_priority &&
+ TransportSeqNumId(config_) == TransportSeqNumId(new_config) &&
+ config_.audio_network_adaptor_config ==
+ new_config.audio_network_adaptor_config) {
+ return;
+ }
+
+ if (!new_config.has_dscp && new_config.min_bitrate_bps != -1 &&
+ new_config.max_bitrate_bps != -1 && TransportSeqNumId(new_config) != 0) {
+ rtp_transport_->AccountForAudioPacketsInPacedSender(true);
+ rtp_transport_->IncludeOverheadInPacedSender();
+ // We may get a callback immediately as the observer is registered, so
+ // make sure the bitrate limits in config_ are up-to-date.
+ config_.min_bitrate_bps = new_config.min_bitrate_bps;
+ config_.max_bitrate_bps = new_config.max_bitrate_bps;
+
+ config_.bitrate_priority = new_config.bitrate_priority;
+ ConfigureBitrateObserver();
+ rtp_rtcp_module_->SetAsPartOfAllocation(true);
+ } else {
+ rtp_transport_->AccountForAudioPacketsInPacedSender(false);
+ RemoveBitrateObserver();
+ rtp_rtcp_module_->SetAsPartOfAllocation(false);
+ }
+}
+
+void AudioSendStream::ConfigureBitrateObserver() {
+ // This either updates the current observer or adds a new observer.
+ // TODO(srte): Add overhead compensation here.
+ auto constraints = GetMinMaxBitrateConstraints();
+ RTC_DCHECK(constraints.has_value());
+
+ DataRate priority_bitrate = allocation_settings_.priority_bitrate;
+ if (use_legacy_overhead_calculation_) {
+ // OverheadPerPacket = Ipv4(20B) + UDP(8B) + SRTP(10B) + RTP(12)
+ constexpr int kOverheadPerPacket = 20 + 8 + 10 + 12;
+ const TimeDelta kMinPacketDuration = TimeDelta::Millis(20);
+ DataRate max_overhead =
+ DataSize::Bytes(kOverheadPerPacket) / kMinPacketDuration;
+ priority_bitrate += max_overhead;
+ } else {
+ RTC_DCHECK(frame_length_range_);
+ const DataSize overhead_per_packet =
+ DataSize::Bytes(total_packet_overhead_bytes_);
+ DataRate min_overhead = overhead_per_packet / frame_length_range_->second;
+ priority_bitrate += min_overhead;
+ }
+
+ if (allocation_settings_.priority_bitrate_raw)
+ priority_bitrate = *allocation_settings_.priority_bitrate_raw;
+
+ rtp_transport_queue_->RunOrPost([this, constraints, priority_bitrate,
+ config_bitrate_priority =
+ config_.bitrate_priority] {
+ RTC_DCHECK_RUN_ON(rtp_transport_queue_);
+ bitrate_allocator_->AddObserver(
+ this,
+ MediaStreamAllocationConfig{
+ constraints->min.bps<uint32_t>(), constraints->max.bps<uint32_t>(),
+ 0, priority_bitrate.bps(), true,
+ allocation_settings_.bitrate_priority.value_or(
+ config_bitrate_priority)});
+ });
+ registered_with_allocator_ = true;
+}
+
+void AudioSendStream::RemoveBitrateObserver() {
+ registered_with_allocator_ = false;
+ rtp_transport_queue_->RunSynchronous([this] {
+ RTC_DCHECK_RUN_ON(rtp_transport_queue_);
+ bitrate_allocator_->RemoveObserver(this);
+ });
+}
+
+absl::optional<AudioSendStream::TargetAudioBitrateConstraints>
+AudioSendStream::GetMinMaxBitrateConstraints() const {
+ if (config_.min_bitrate_bps < 0 || config_.max_bitrate_bps < 0) {
+ RTC_LOG(LS_WARNING) << "Config is invalid: min_bitrate_bps="
+ << config_.min_bitrate_bps
+ << "; max_bitrate_bps=" << config_.max_bitrate_bps
+ << "; both expected greater or equal to 0";
+ return absl::nullopt;
+ }
+ TargetAudioBitrateConstraints constraints{
+ DataRate::BitsPerSec(config_.min_bitrate_bps),
+ DataRate::BitsPerSec(config_.max_bitrate_bps)};
+
+ // If bitrates were explicitly overriden via field trial, use those values.
+ if (allocation_settings_.min_bitrate)
+ constraints.min = *allocation_settings_.min_bitrate;
+ if (allocation_settings_.max_bitrate)
+ constraints.max = *allocation_settings_.max_bitrate;
+
+ RTC_DCHECK_GE(constraints.min, DataRate::Zero());
+ RTC_DCHECK_GE(constraints.max, DataRate::Zero());
+ if (constraints.max < constraints.min) {
+ RTC_LOG(LS_WARNING) << "TargetAudioBitrateConstraints::max is less than "
+ << "TargetAudioBitrateConstraints::min";
+ return absl::nullopt;
+ }
+ if (use_legacy_overhead_calculation_) {
+ // OverheadPerPacket = Ipv4(20B) + UDP(8B) + SRTP(10B) + RTP(12)
+ const DataSize kOverheadPerPacket = DataSize::Bytes(20 + 8 + 10 + 12);
+ const TimeDelta kMaxFrameLength =
+ TimeDelta::Millis(60); // Based on Opus spec
+ const DataRate kMinOverhead = kOverheadPerPacket / kMaxFrameLength;
+ constraints.min += kMinOverhead;
+ constraints.max += kMinOverhead;
+ } else {
+ if (!frame_length_range_.has_value()) {
+ RTC_LOG(LS_WARNING) << "frame_length_range_ is not set";
+ return absl::nullopt;
+ }
+ const DataSize kOverheadPerPacket =
+ DataSize::Bytes(total_packet_overhead_bytes_);
+ constraints.min += kOverheadPerPacket / frame_length_range_->second;
+ constraints.max += kOverheadPerPacket / frame_length_range_->first;
+ }
+ return constraints;
+}
+
+void AudioSendStream::RegisterCngPayloadType(int payload_type,
+ int clockrate_hz) {
+ channel_send_->RegisterCngPayloadType(payload_type, clockrate_hz);
+}
+
+void AudioSendStream::UpdateCachedTargetAudioBitrateConstraints() {
+ absl::optional<AudioSendStream::TargetAudioBitrateConstraints>
+ new_constraints = GetMinMaxBitrateConstraints();
+ if (!new_constraints.has_value()) {
+ return;
+ }
+ rtp_transport_queue_->RunOrPost([this, new_constraints]() {
+ RTC_DCHECK_RUN_ON(rtp_transport_queue_);
+ cached_constraints_ = new_constraints;
+ });
+}
+
+} // namespace internal
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_send_stream.h b/third_party/libwebrtc/audio/audio_send_stream.h
new file mode 100644
index 0000000000..42be43afb9
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_send_stream.h
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_AUDIO_SEND_STREAM_H_
+#define AUDIO_AUDIO_SEND_STREAM_H_
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "absl/functional/any_invocable.h"
+#include "api/field_trials_view.h"
+#include "api/sequence_checker.h"
+#include "api/task_queue/task_queue_base.h"
+#include "audio/audio_level.h"
+#include "audio/channel_send.h"
+#include "call/audio_send_stream.h"
+#include "call/audio_state.h"
+#include "call/bitrate_allocator.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_interface.h"
+#include "modules/utility/maybe_worker_thread.h"
+#include "rtc_base/experiments/struct_parameters_parser.h"
+#include "rtc_base/race_checker.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/task_queue.h"
+
+namespace webrtc {
+class RtcEventLog;
+class RtcpBandwidthObserver;
+class RtcpRttStats;
+class RtpTransportControllerSendInterface;
+
+struct AudioAllocationConfig {
+ static constexpr char kKey[] = "WebRTC-Audio-Allocation";
+ // Field Trial configured bitrates to use as overrides over default/user
+ // configured bitrate range when audio bitrate allocation is enabled.
+ absl::optional<DataRate> min_bitrate;
+ absl::optional<DataRate> max_bitrate;
+ DataRate priority_bitrate = DataRate::Zero();
+ // By default the priority_bitrate is compensated for packet overhead.
+ // Use this flag to configure a raw value instead.
+ absl::optional<DataRate> priority_bitrate_raw;
+ absl::optional<double> bitrate_priority;
+
+ std::unique_ptr<StructParametersParser> Parser();
+ explicit AudioAllocationConfig(const FieldTrialsView& field_trials);
+};
+namespace internal {
+class AudioState;
+
+class AudioSendStream final : public webrtc::AudioSendStream,
+ public webrtc::BitrateAllocatorObserver {
+ public:
+ AudioSendStream(Clock* clock,
+ const webrtc::AudioSendStream::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ TaskQueueFactory* task_queue_factory,
+ RtpTransportControllerSendInterface* rtp_transport,
+ BitrateAllocatorInterface* bitrate_allocator,
+ RtcEventLog* event_log,
+ RtcpRttStats* rtcp_rtt_stats,
+ const absl::optional<RtpState>& suspended_rtp_state,
+ const FieldTrialsView& field_trials);
+ // For unit tests, which need to supply a mock ChannelSend.
+ AudioSendStream(Clock* clock,
+ const webrtc::AudioSendStream::Config& config,
+ const rtc::scoped_refptr<webrtc::AudioState>& audio_state,
+ TaskQueueFactory* task_queue_factory,
+ RtpTransportControllerSendInterface* rtp_transport,
+ BitrateAllocatorInterface* bitrate_allocator,
+ RtcEventLog* event_log,
+ const absl::optional<RtpState>& suspended_rtp_state,
+ std::unique_ptr<voe::ChannelSendInterface> channel_send,
+ const FieldTrialsView& field_trials);
+
+ AudioSendStream() = delete;
+ AudioSendStream(const AudioSendStream&) = delete;
+ AudioSendStream& operator=(const AudioSendStream&) = delete;
+
+ ~AudioSendStream() override;
+
+ // webrtc::AudioSendStream implementation.
+ const webrtc::AudioSendStream::Config& GetConfig() const override;
+ void Reconfigure(const webrtc::AudioSendStream::Config& config,
+ SetParametersCallback callback) override;
+ void Start() override;
+ void Stop() override;
+ void SendAudioData(std::unique_ptr<AudioFrame> audio_frame) override;
+ bool SendTelephoneEvent(int payload_type,
+ int payload_frequency,
+ int event,
+ int duration_ms) override;
+ void SetMuted(bool muted) override;
+ webrtc::AudioSendStream::Stats GetStats() const override;
+ webrtc::AudioSendStream::Stats GetStats(
+ bool has_remote_tracks) const override;
+
+ void DeliverRtcp(const uint8_t* packet, size_t length);
+
+ // Implements BitrateAllocatorObserver.
+ uint32_t OnBitrateUpdated(BitrateAllocationUpdate update) override;
+
+ void SetTransportOverhead(int transport_overhead_per_packet_bytes);
+
+ RtpState GetRtpState() const;
+ const voe::ChannelSendInterface* GetChannel() const;
+
+ // Returns combined per-packet overhead.
+ size_t TestOnlyGetPerPacketOverheadBytes() const
+ RTC_LOCKS_EXCLUDED(overhead_per_packet_lock_);
+
+ private:
+ class TimedTransport;
+ // Constraints including overhead.
+ struct TargetAudioBitrateConstraints {
+ DataRate min;
+ DataRate max;
+ };
+
+ internal::AudioState* audio_state();
+ const internal::AudioState* audio_state() const;
+
+ void StoreEncoderProperties(int sample_rate_hz, size_t num_channels)
+ RTC_RUN_ON(worker_thread_checker_);
+
+ void ConfigureStream(const Config& new_config,
+ bool first_time,
+ SetParametersCallback callback)
+ RTC_RUN_ON(worker_thread_checker_);
+ bool SetupSendCodec(const Config& new_config)
+ RTC_RUN_ON(worker_thread_checker_);
+ bool ReconfigureSendCodec(const Config& new_config)
+ RTC_RUN_ON(worker_thread_checker_);
+ void ReconfigureANA(const Config& new_config)
+ RTC_RUN_ON(worker_thread_checker_);
+ void ReconfigureCNG(const Config& new_config)
+ RTC_RUN_ON(worker_thread_checker_);
+ void ReconfigureBitrateObserver(const Config& new_config)
+ RTC_RUN_ON(worker_thread_checker_);
+
+ void ConfigureBitrateObserver() RTC_RUN_ON(worker_thread_checker_);
+ void RemoveBitrateObserver() RTC_RUN_ON(worker_thread_checker_);
+
+ // Returns bitrate constraints, maybe including overhead when enabled by
+ // field trial.
+ absl::optional<TargetAudioBitrateConstraints> GetMinMaxBitrateConstraints()
+ const RTC_RUN_ON(worker_thread_checker_);
+
+ // Sets per-packet overhead on encoded (for ANA) based on current known values
+ // of transport and packetization overheads.
+ void UpdateOverheadForEncoder()
+ RTC_EXCLUSIVE_LOCKS_REQUIRED(overhead_per_packet_lock_);
+
+ // Returns combined per-packet overhead.
+ size_t GetPerPacketOverheadBytes() const
+ RTC_EXCLUSIVE_LOCKS_REQUIRED(overhead_per_packet_lock_);
+
+ void RegisterCngPayloadType(int payload_type, int clockrate_hz)
+ RTC_RUN_ON(worker_thread_checker_);
+
+ void UpdateCachedTargetAudioBitrateConstraints()
+ RTC_RUN_ON(worker_thread_checker_);
+
+ Clock* clock_;
+ const FieldTrialsView& field_trials_;
+
+ SequenceChecker worker_thread_checker_;
+ rtc::RaceChecker audio_capture_race_checker_;
+ MaybeWorkerThread* rtp_transport_queue_;
+
+ const bool allocate_audio_without_feedback_;
+ const bool force_no_audio_feedback_ = allocate_audio_without_feedback_;
+ const bool enable_audio_alr_probing_;
+ const AudioAllocationConfig allocation_settings_;
+
+ webrtc::AudioSendStream::Config config_
+ RTC_GUARDED_BY(worker_thread_checker_);
+ rtc::scoped_refptr<webrtc::AudioState> audio_state_;
+ const std::unique_ptr<voe::ChannelSendInterface> channel_send_;
+ RtcEventLog* const event_log_;
+ const bool use_legacy_overhead_calculation_;
+
+ int encoder_sample_rate_hz_ RTC_GUARDED_BY(worker_thread_checker_) = 0;
+ size_t encoder_num_channels_ RTC_GUARDED_BY(worker_thread_checker_) = 0;
+ bool sending_ RTC_GUARDED_BY(worker_thread_checker_) = false;
+ mutable Mutex audio_level_lock_;
+ // Keeps track of audio level, total audio energy and total samples duration.
+ // https://w3c.github.io/webrtc-stats/#dom-rtcaudiohandlerstats-totalaudioenergy
+ webrtc::voe::AudioLevel audio_level_ RTC_GUARDED_BY(audio_level_lock_);
+
+ BitrateAllocatorInterface* const bitrate_allocator_
+ RTC_GUARDED_BY(rtp_transport_queue_);
+ // Constrains cached to be accessed from `rtp_transport_queue_`.
+ absl::optional<AudioSendStream::TargetAudioBitrateConstraints>
+ cached_constraints_ RTC_GUARDED_BY(rtp_transport_queue_) = absl::nullopt;
+ RtpTransportControllerSendInterface* const rtp_transport_;
+
+ RtpRtcpInterface* const rtp_rtcp_module_;
+ absl::optional<RtpState> const suspended_rtp_state_;
+
+ // RFC 5285: Each distinct extension MUST have a unique ID. The value 0 is
+ // reserved for padding and MUST NOT be used as a local identifier.
+ // So it should be safe to use 0 here to indicate "not configured".
+ struct ExtensionIds {
+ int audio_level = 0;
+ int abs_send_time = 0;
+ int abs_capture_time = 0;
+ int transport_sequence_number = 0;
+ int mid = 0;
+ int rid = 0;
+ int repaired_rid = 0;
+ };
+ static ExtensionIds FindExtensionIds(
+ const std::vector<RtpExtension>& extensions);
+ static int TransportSeqNumId(const Config& config);
+
+ mutable Mutex overhead_per_packet_lock_;
+ size_t overhead_per_packet_ RTC_GUARDED_BY(overhead_per_packet_lock_) = 0;
+
+ // Current transport overhead (ICE, TURN, etc.)
+ size_t transport_overhead_per_packet_bytes_
+ RTC_GUARDED_BY(overhead_per_packet_lock_) = 0;
+
+ bool registered_with_allocator_ RTC_GUARDED_BY(worker_thread_checker_) =
+ false;
+ size_t total_packet_overhead_bytes_ RTC_GUARDED_BY(worker_thread_checker_) =
+ 0;
+ absl::optional<std::pair<TimeDelta, TimeDelta>> frame_length_range_
+ RTC_GUARDED_BY(worker_thread_checker_);
+};
+} // namespace internal
+} // namespace webrtc
+
+#endif // AUDIO_AUDIO_SEND_STREAM_H_
diff --git a/third_party/libwebrtc/audio/audio_send_stream_tests.cc b/third_party/libwebrtc/audio/audio_send_stream_tests.cc
new file mode 100644
index 0000000000..2ec7229bfb
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_send_stream_tests.cc
@@ -0,0 +1,248 @@
+/*
+ * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "modules/rtp_rtcp/include/rtp_header_extension_map.h"
+#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
+#include "modules/rtp_rtcp/source/rtp_packet.h"
+#include "test/call_test.h"
+#include "test/field_trial.h"
+#include "test/gtest.h"
+#include "test/rtcp_packet_parser.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+enum : int { // The first valid value is 1.
+ kAudioLevelExtensionId = 1,
+ kTransportSequenceNumberExtensionId,
+};
+
+class AudioSendTest : public SendTest {
+ public:
+ AudioSendTest() : SendTest(CallTest::kDefaultTimeout) {}
+
+ size_t GetNumVideoStreams() const override { return 0; }
+ size_t GetNumAudioStreams() const override { return 1; }
+ size_t GetNumFlexfecStreams() const override { return 0; }
+};
+} // namespace
+
+using AudioSendStreamCallTest = CallTest;
+
+TEST_F(AudioSendStreamCallTest, SupportsCName) {
+ static std::string kCName = "PjqatC14dGfbVwGPUOA9IH7RlsFDbWl4AhXEiDsBizo=";
+ class CNameObserver : public AudioSendTest {
+ public:
+ CNameObserver() = default;
+
+ private:
+ Action OnSendRtcp(const uint8_t* packet, size_t length) override {
+ RtcpPacketParser parser;
+ EXPECT_TRUE(parser.Parse(packet, length));
+ if (parser.sdes()->num_packets() > 0) {
+ EXPECT_EQ(1u, parser.sdes()->chunks().size());
+ EXPECT_EQ(kCName, parser.sdes()->chunks()[0].cname);
+
+ observation_complete_.Set();
+ }
+
+ return SEND_PACKET;
+ }
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ send_config->rtp.c_name = kCName;
+ }
+
+ void PerformTest() override {
+ EXPECT_TRUE(Wait()) << "Timed out while waiting for RTCP with CNAME.";
+ }
+ } test;
+
+ RunBaseTest(&test);
+}
+
+TEST_F(AudioSendStreamCallTest, NoExtensionsByDefault) {
+ class NoExtensionsObserver : public AudioSendTest {
+ public:
+ NoExtensionsObserver() = default;
+
+ private:
+ Action OnSendRtp(const uint8_t* packet, size_t length) override {
+ RtpPacket rtp_packet;
+ EXPECT_TRUE(rtp_packet.Parse(packet, length)); // rtp packet is valid.
+ EXPECT_EQ(packet[0] & 0b0001'0000, 0); // extension bit not set.
+
+ observation_complete_.Set();
+ return SEND_PACKET;
+ }
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ send_config->rtp.extensions.clear();
+ }
+
+ void PerformTest() override {
+ EXPECT_TRUE(Wait()) << "Timed out while waiting for a single RTP packet.";
+ }
+ } test;
+
+ RunBaseTest(&test);
+}
+
+TEST_F(AudioSendStreamCallTest, SupportsAudioLevel) {
+ class AudioLevelObserver : public AudioSendTest {
+ public:
+ AudioLevelObserver() : AudioSendTest() {
+ extensions_.Register<AudioLevel>(kAudioLevelExtensionId);
+ }
+
+ Action OnSendRtp(const uint8_t* packet, size_t length) override {
+ RtpPacket rtp_packet(&extensions_);
+ EXPECT_TRUE(rtp_packet.Parse(packet, length));
+
+ uint8_t audio_level = 0;
+ bool voice = false;
+ EXPECT_TRUE(rtp_packet.GetExtension<AudioLevel>(&voice, &audio_level));
+ if (audio_level != 0) {
+ // Wait for at least one packet with a non-zero level.
+ observation_complete_.Set();
+ } else {
+ RTC_LOG(LS_WARNING) << "Got a packet with zero audioLevel - waiting"
+ " for another packet...";
+ }
+
+ return SEND_PACKET;
+ }
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ send_config->rtp.extensions.clear();
+ send_config->rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelExtensionId));
+ }
+
+ void PerformTest() override {
+ EXPECT_TRUE(Wait()) << "Timed out while waiting for single RTP packet.";
+ }
+
+ private:
+ RtpHeaderExtensionMap extensions_;
+ } test;
+
+ RunBaseTest(&test);
+}
+
+class TransportWideSequenceNumberObserver : public AudioSendTest {
+ public:
+ explicit TransportWideSequenceNumberObserver(bool expect_sequence_number)
+ : AudioSendTest(), expect_sequence_number_(expect_sequence_number) {
+ extensions_.Register<TransportSequenceNumber>(
+ kTransportSequenceNumberExtensionId);
+ }
+
+ private:
+ Action OnSendRtp(const uint8_t* packet, size_t length) override {
+ RtpPacket rtp_packet(&extensions_);
+ EXPECT_TRUE(rtp_packet.Parse(packet, length));
+
+ EXPECT_EQ(rtp_packet.HasExtension<TransportSequenceNumber>(),
+ expect_sequence_number_);
+ EXPECT_FALSE(rtp_packet.HasExtension<TransmissionOffset>());
+ EXPECT_FALSE(rtp_packet.HasExtension<AbsoluteSendTime>());
+
+ observation_complete_.Set();
+
+ return SEND_PACKET;
+ }
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ send_config->rtp.extensions.clear();
+ send_config->rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kTransportSequenceNumberUri,
+ kTransportSequenceNumberExtensionId));
+ }
+
+ void PerformTest() override {
+ EXPECT_TRUE(Wait()) << "Timed out while waiting for a single RTP packet.";
+ }
+ const bool expect_sequence_number_;
+ RtpHeaderExtensionMap extensions_;
+};
+
+TEST_F(AudioSendStreamCallTest, SendsTransportWideSequenceNumbersInFieldTrial) {
+ TransportWideSequenceNumberObserver test(/*expect_sequence_number=*/true);
+ RunBaseTest(&test);
+}
+
+TEST_F(AudioSendStreamCallTest, SendDtmf) {
+ static const uint8_t kDtmfPayloadType = 120;
+ static const int kDtmfPayloadFrequency = 8000;
+ static const int kDtmfEventFirst = 12;
+ static const int kDtmfEventLast = 31;
+ static const int kDtmfDuration = 50;
+ class DtmfObserver : public AudioSendTest {
+ public:
+ DtmfObserver() = default;
+
+ private:
+ Action OnSendRtp(const uint8_t* packet, size_t length) override {
+ RtpPacket rtp_packet;
+ EXPECT_TRUE(rtp_packet.Parse(packet, length));
+
+ if (rtp_packet.PayloadType() == kDtmfPayloadType) {
+ EXPECT_EQ(rtp_packet.headers_size(), 12u);
+ EXPECT_EQ(rtp_packet.size(), 16u);
+ const int event = rtp_packet.payload()[0];
+ if (event != expected_dtmf_event_) {
+ ++expected_dtmf_event_;
+ EXPECT_EQ(event, expected_dtmf_event_);
+ if (expected_dtmf_event_ == kDtmfEventLast) {
+ observation_complete_.Set();
+ }
+ }
+ }
+
+ return SEND_PACKET;
+ }
+
+ void OnAudioStreamsCreated(AudioSendStream* send_stream,
+ const std::vector<AudioReceiveStreamInterface*>&
+ receive_streams) override {
+ // Need to start stream here, else DTMF events are dropped.
+ send_stream->Start();
+ for (int event = kDtmfEventFirst; event <= kDtmfEventLast; ++event) {
+ send_stream->SendTelephoneEvent(kDtmfPayloadType, kDtmfPayloadFrequency,
+ event, kDtmfDuration);
+ }
+ }
+
+ void PerformTest() override {
+ EXPECT_TRUE(Wait()) << "Timed out while waiting for DTMF stream.";
+ }
+
+ int expected_dtmf_event_ = kDtmfEventFirst;
+ } test;
+
+ RunBaseTest(&test);
+}
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_send_stream_unittest.cc b/third_party/libwebrtc/audio/audio_send_stream_unittest.cc
new file mode 100644
index 0000000000..a81b40cbe7
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_send_stream_unittest.cc
@@ -0,0 +1,949 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_send_stream.h"
+
+#include <memory>
+#include <string>
+#include <thread>
+#include <utility>
+#include <vector>
+
+#include "api/task_queue/default_task_queue_factory.h"
+#include "api/test/mock_frame_encryptor.h"
+#include "audio/audio_state.h"
+#include "audio/conversion.h"
+#include "audio/mock_voe_channel_proxy.h"
+#include "call/test/mock_rtp_transport_controller_send.h"
+#include "logging/rtc_event_log/mock/mock_rtc_event_log.h"
+#include "modules/audio_device/include/mock_audio_device.h"
+#include "modules/audio_mixer/audio_mixer_impl.h"
+#include "modules/audio_mixer/sine_wave_generator.h"
+#include "modules/audio_processing/include/audio_processing_statistics.h"
+#include "modules/audio_processing/include/mock_audio_processing.h"
+#include "modules/rtp_rtcp/mocks/mock_rtcp_bandwidth_observer.h"
+#include "modules/rtp_rtcp/mocks/mock_rtp_rtcp.h"
+#include "modules/utility/maybe_worker_thread.h"
+#include "system_wrappers/include/clock.h"
+#include "test/gtest.h"
+#include "test/mock_audio_encoder.h"
+#include "test/mock_audio_encoder_factory.h"
+#include "test/scoped_key_value_config.h"
+#include "test/time_controller/real_time_controller.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+using ::testing::_;
+using ::testing::AnyNumber;
+using ::testing::Eq;
+using ::testing::Field;
+using ::testing::InSequence;
+using ::testing::Invoke;
+using ::testing::Ne;
+using ::testing::NiceMock;
+using ::testing::Return;
+using ::testing::StrEq;
+
+static const float kTolerance = 0.0001f;
+
+const uint32_t kSsrc = 1234;
+const char* kCName = "foo_name";
+const int kAudioLevelId = 2;
+const int kTransportSequenceNumberId = 4;
+const int32_t kEchoDelayMedian = 254;
+const int32_t kEchoDelayStdDev = -3;
+const double kDivergentFilterFraction = 0.2f;
+const double kEchoReturnLoss = -65;
+const double kEchoReturnLossEnhancement = 101;
+const double kResidualEchoLikelihood = -1.0f;
+const double kResidualEchoLikelihoodMax = 23.0f;
+const CallSendStatistics kCallStats = {112, 12, 13456, 17890};
+const ReportBlock kReportBlock = {456, 780, 123, 567, 890, 132, 143, 13354};
+const int kTelephoneEventPayloadType = 123;
+const int kTelephoneEventPayloadFrequency = 65432;
+const int kTelephoneEventCode = 45;
+const int kTelephoneEventDuration = 6789;
+constexpr int kIsacPayloadType = 103;
+const SdpAudioFormat kIsacFormat = {"isac", 16000, 1};
+const SdpAudioFormat kOpusFormat = {"opus", 48000, 2};
+const SdpAudioFormat kG722Format = {"g722", 8000, 1};
+const AudioCodecSpec kCodecSpecs[] = {
+ {kIsacFormat, {16000, 1, 32000, 10000, 32000}},
+ {kOpusFormat, {48000, 1, 32000, 6000, 510000}},
+ {kG722Format, {16000, 1, 64000}}};
+
+// TODO(dklee): This mirrors calculation in audio_send_stream.cc, which
+// should be made more precise in the future. This can be changed when that
+// logic is more accurate.
+const DataSize kOverheadPerPacket = DataSize::Bytes(20 + 8 + 10 + 12);
+const TimeDelta kMinFrameLength = TimeDelta::Millis(20);
+const TimeDelta kMaxFrameLength = TimeDelta::Millis(120);
+const DataRate kMinOverheadRate = kOverheadPerPacket / kMaxFrameLength;
+const DataRate kMaxOverheadRate = kOverheadPerPacket / kMinFrameLength;
+
+class MockLimitObserver : public BitrateAllocator::LimitObserver {
+ public:
+ MOCK_METHOD(void,
+ OnAllocationLimitsChanged,
+ (BitrateAllocationLimits),
+ (override));
+};
+
+std::unique_ptr<MockAudioEncoder> SetupAudioEncoderMock(
+ int payload_type,
+ const SdpAudioFormat& format) {
+ for (const auto& spec : kCodecSpecs) {
+ if (format == spec.format) {
+ std::unique_ptr<MockAudioEncoder> encoder(
+ new ::testing::NiceMock<MockAudioEncoder>());
+ ON_CALL(*encoder.get(), SampleRateHz())
+ .WillByDefault(Return(spec.info.sample_rate_hz));
+ ON_CALL(*encoder.get(), NumChannels())
+ .WillByDefault(Return(spec.info.num_channels));
+ ON_CALL(*encoder.get(), RtpTimestampRateHz())
+ .WillByDefault(Return(spec.format.clockrate_hz));
+ ON_CALL(*encoder.get(), GetFrameLengthRange())
+ .WillByDefault(Return(absl::optional<std::pair<TimeDelta, TimeDelta>>{
+ {TimeDelta::Millis(20), TimeDelta::Millis(120)}}));
+ return encoder;
+ }
+ }
+ return nullptr;
+}
+
+rtc::scoped_refptr<MockAudioEncoderFactory> SetupEncoderFactoryMock() {
+ rtc::scoped_refptr<MockAudioEncoderFactory> factory =
+ rtc::make_ref_counted<MockAudioEncoderFactory>();
+ ON_CALL(*factory.get(), GetSupportedEncoders())
+ .WillByDefault(Return(std::vector<AudioCodecSpec>(
+ std::begin(kCodecSpecs), std::end(kCodecSpecs))));
+ ON_CALL(*factory.get(), QueryAudioEncoder(_))
+ .WillByDefault(Invoke(
+ [](const SdpAudioFormat& format) -> absl::optional<AudioCodecInfo> {
+ for (const auto& spec : kCodecSpecs) {
+ if (format == spec.format) {
+ return spec.info;
+ }
+ }
+ return absl::nullopt;
+ }));
+ ON_CALL(*factory.get(), MakeAudioEncoderMock(_, _, _, _))
+ .WillByDefault(Invoke([](int payload_type, const SdpAudioFormat& format,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ std::unique_ptr<AudioEncoder>* return_value) {
+ *return_value = SetupAudioEncoderMock(payload_type, format);
+ }));
+ return factory;
+}
+
+struct ConfigHelper {
+ ConfigHelper(bool audio_bwe_enabled,
+ bool expect_set_encoder_call,
+ bool use_null_audio_processing)
+ : stream_config_(/*send_transport=*/nullptr),
+ audio_processing_(
+ use_null_audio_processing
+ ? nullptr
+ : rtc::make_ref_counted<NiceMock<MockAudioProcessing>>()),
+ bitrate_allocator_(&limit_observer_),
+ worker_queue_(field_trials,
+ "ConfigHelper_worker_queue",
+ time_controller_.GetTaskQueueFactory()),
+ audio_encoder_(nullptr) {
+ using ::testing::Invoke;
+
+ AudioState::Config config;
+ config.audio_mixer = AudioMixerImpl::Create();
+ config.audio_processing = audio_processing_;
+ config.audio_device_module = rtc::make_ref_counted<MockAudioDeviceModule>();
+ audio_state_ = AudioState::Create(config);
+
+ SetupDefaultChannelSend(audio_bwe_enabled);
+ SetupMockForSetupSendCodec(expect_set_encoder_call);
+ SetupMockForCallEncoder();
+
+ // Use ISAC as default codec so as to prevent unnecessary `channel_proxy_`
+ // calls from the default ctor behavior.
+ stream_config_.send_codec_spec =
+ AudioSendStream::Config::SendCodecSpec(kIsacPayloadType, kIsacFormat);
+ stream_config_.rtp.ssrc = kSsrc;
+ stream_config_.rtp.c_name = kCName;
+ stream_config_.rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelId));
+ if (audio_bwe_enabled) {
+ AddBweToConfig(&stream_config_);
+ }
+ stream_config_.encoder_factory = SetupEncoderFactoryMock();
+ stream_config_.min_bitrate_bps = 10000;
+ stream_config_.max_bitrate_bps = 65000;
+ }
+
+ std::unique_ptr<internal::AudioSendStream> CreateAudioSendStream() {
+ EXPECT_CALL(rtp_transport_, GetWorkerQueue())
+ .WillRepeatedly(Return(&worker_queue_));
+ return std::unique_ptr<internal::AudioSendStream>(
+ new internal::AudioSendStream(
+ time_controller_.GetClock(), stream_config_, audio_state_,
+ time_controller_.GetTaskQueueFactory(), &rtp_transport_,
+ &bitrate_allocator_, &event_log_, absl::nullopt,
+ std::unique_ptr<voe::ChannelSendInterface>(channel_send_),
+ field_trials));
+ }
+
+ AudioSendStream::Config& config() { return stream_config_; }
+ MockAudioEncoderFactory& mock_encoder_factory() {
+ return *static_cast<MockAudioEncoderFactory*>(
+ stream_config_.encoder_factory.get());
+ }
+ MockRtpRtcpInterface* rtp_rtcp() { return &rtp_rtcp_; }
+ MockChannelSend* channel_send() { return channel_send_; }
+ RtpTransportControllerSendInterface* transport() { return &rtp_transport_; }
+
+ static void AddBweToConfig(AudioSendStream::Config* config) {
+ config->rtp.extensions.push_back(RtpExtension(
+ RtpExtension::kTransportSequenceNumberUri, kTransportSequenceNumberId));
+ config->send_codec_spec->transport_cc_enabled = true;
+ }
+
+ void SetupDefaultChannelSend(bool audio_bwe_enabled) {
+ EXPECT_TRUE(channel_send_ == nullptr);
+ channel_send_ = new ::testing::StrictMock<MockChannelSend>();
+ EXPECT_CALL(*channel_send_, GetRtpRtcp()).WillRepeatedly(Invoke([this]() {
+ return &this->rtp_rtcp_;
+ }));
+ EXPECT_CALL(rtp_rtcp_, SSRC).WillRepeatedly(Return(kSsrc));
+ EXPECT_CALL(*channel_send_, SetRTCP_CNAME(StrEq(kCName))).Times(1);
+ EXPECT_CALL(*channel_send_, SetFrameEncryptor(_)).Times(1);
+ EXPECT_CALL(*channel_send_, SetEncoderToPacketizerFrameTransformer(_))
+ .Times(1);
+ EXPECT_CALL(rtp_rtcp_, SetExtmapAllowMixed(false)).Times(1);
+ EXPECT_CALL(*channel_send_,
+ SetSendAudioLevelIndicationStatus(true, kAudioLevelId))
+ .Times(1);
+ EXPECT_CALL(rtp_transport_, GetBandwidthObserver())
+ .WillRepeatedly(Return(&bandwidth_observer_));
+ if (audio_bwe_enabled) {
+ EXPECT_CALL(rtp_rtcp_,
+ RegisterRtpHeaderExtension(TransportSequenceNumber::Uri(),
+ kTransportSequenceNumberId))
+ .Times(1);
+ EXPECT_CALL(*channel_send_,
+ RegisterSenderCongestionControlObjects(
+ &rtp_transport_, Eq(&bandwidth_observer_)))
+ .Times(1);
+ } else {
+ EXPECT_CALL(*channel_send_, RegisterSenderCongestionControlObjects(
+ &rtp_transport_, Eq(nullptr)))
+ .Times(1);
+ }
+ EXPECT_CALL(*channel_send_, ResetSenderCongestionControlObjects()).Times(1);
+ }
+
+ void SetupMockForSetupSendCodec(bool expect_set_encoder_call) {
+ if (expect_set_encoder_call) {
+ EXPECT_CALL(*channel_send_, SetEncoder)
+ .WillOnce(
+ [this](int payload_type, std::unique_ptr<AudioEncoder> encoder) {
+ this->audio_encoder_ = std::move(encoder);
+ return true;
+ });
+ }
+ }
+
+ void SetupMockForCallEncoder() {
+ // Let ModifyEncoder to invoke mock audio encoder.
+ EXPECT_CALL(*channel_send_, CallEncoder(_))
+ .WillRepeatedly(
+ [this](rtc::FunctionView<void(AudioEncoder*)> modifier) {
+ if (this->audio_encoder_)
+ modifier(this->audio_encoder_.get());
+ });
+ }
+
+ void SetupMockForSendTelephoneEvent() {
+ EXPECT_TRUE(channel_send_);
+ EXPECT_CALL(*channel_send_, SetSendTelephoneEventPayloadType(
+ kTelephoneEventPayloadType,
+ kTelephoneEventPayloadFrequency));
+ EXPECT_CALL(
+ *channel_send_,
+ SendTelephoneEventOutband(kTelephoneEventCode, kTelephoneEventDuration))
+ .WillOnce(Return(true));
+ }
+
+ void SetupMockForGetStats(bool use_null_audio_processing) {
+ using ::testing::DoAll;
+ using ::testing::SetArgPointee;
+ using ::testing::SetArgReferee;
+
+ std::vector<ReportBlock> report_blocks;
+ webrtc::ReportBlock block = kReportBlock;
+ report_blocks.push_back(block); // Has wrong SSRC.
+ block.source_SSRC = kSsrc;
+ report_blocks.push_back(block); // Correct block.
+ block.fraction_lost = 0;
+ report_blocks.push_back(block); // Duplicate SSRC, bad fraction_lost.
+
+ EXPECT_TRUE(channel_send_);
+ EXPECT_CALL(*channel_send_, GetRTCPStatistics())
+ .WillRepeatedly(Return(kCallStats));
+ EXPECT_CALL(*channel_send_, GetRemoteRTCPReportBlocks())
+ .WillRepeatedly(Return(report_blocks));
+ EXPECT_CALL(*channel_send_, GetANAStatistics())
+ .WillRepeatedly(Return(ANAStats()));
+ EXPECT_CALL(*channel_send_, GetTargetBitrate()).WillRepeatedly(Return(0));
+
+ audio_processing_stats_.echo_return_loss = kEchoReturnLoss;
+ audio_processing_stats_.echo_return_loss_enhancement =
+ kEchoReturnLossEnhancement;
+ audio_processing_stats_.delay_median_ms = kEchoDelayMedian;
+ audio_processing_stats_.delay_standard_deviation_ms = kEchoDelayStdDev;
+ audio_processing_stats_.divergent_filter_fraction =
+ kDivergentFilterFraction;
+ audio_processing_stats_.residual_echo_likelihood = kResidualEchoLikelihood;
+ audio_processing_stats_.residual_echo_likelihood_recent_max =
+ kResidualEchoLikelihoodMax;
+ if (!use_null_audio_processing) {
+ ASSERT_TRUE(audio_processing_);
+ EXPECT_CALL(*audio_processing_, GetStatistics(true))
+ .WillRepeatedly(Return(audio_processing_stats_));
+ }
+ }
+
+ MaybeWorkerThread* worker() { return &worker_queue_; }
+
+ test::ScopedKeyValueConfig field_trials;
+
+ private:
+ RealTimeController time_controller_;
+ rtc::scoped_refptr<AudioState> audio_state_;
+ AudioSendStream::Config stream_config_;
+ ::testing::StrictMock<MockChannelSend>* channel_send_ = nullptr;
+ rtc::scoped_refptr<MockAudioProcessing> audio_processing_;
+ AudioProcessingStats audio_processing_stats_;
+ ::testing::StrictMock<MockRtcpBandwidthObserver> bandwidth_observer_;
+ ::testing::NiceMock<MockRtcEventLog> event_log_;
+ ::testing::NiceMock<MockRtpTransportControllerSend> rtp_transport_;
+ ::testing::NiceMock<MockRtpRtcpInterface> rtp_rtcp_;
+ ::testing::NiceMock<MockLimitObserver> limit_observer_;
+ BitrateAllocator bitrate_allocator_;
+ // `worker_queue` is defined last to ensure all pending tasks are cancelled
+ // and deleted before any other members.
+ MaybeWorkerThread worker_queue_;
+ std::unique_ptr<AudioEncoder> audio_encoder_;
+};
+
+// The audio level ranges linearly [0,32767].
+std::unique_ptr<AudioFrame> CreateAudioFrame1kHzSineWave(int16_t audio_level,
+ int duration_ms,
+ int sample_rate_hz,
+ size_t num_channels) {
+ size_t samples_per_channel = sample_rate_hz / (1000 / duration_ms);
+ std::vector<int16_t> audio_data(samples_per_channel * num_channels, 0);
+ std::unique_ptr<AudioFrame> audio_frame = std::make_unique<AudioFrame>();
+ audio_frame->UpdateFrame(0 /* RTP timestamp */, &audio_data[0],
+ samples_per_channel, sample_rate_hz,
+ AudioFrame::SpeechType::kNormalSpeech,
+ AudioFrame::VADActivity::kVadUnknown, num_channels);
+ SineWaveGenerator wave_generator(1000.0, audio_level);
+ wave_generator.GenerateNextFrame(audio_frame.get());
+ return audio_frame;
+}
+
+} // namespace
+
+TEST(AudioSendStreamTest, ConfigToString) {
+ AudioSendStream::Config config(/*send_transport=*/nullptr);
+ config.rtp.ssrc = kSsrc;
+ config.rtp.c_name = kCName;
+ config.min_bitrate_bps = 12000;
+ config.max_bitrate_bps = 34000;
+ config.has_dscp = true;
+ config.send_codec_spec =
+ AudioSendStream::Config::SendCodecSpec(kIsacPayloadType, kIsacFormat);
+ config.send_codec_spec->nack_enabled = true;
+ config.send_codec_spec->transport_cc_enabled = false;
+ config.send_codec_spec->cng_payload_type = 42;
+ config.send_codec_spec->red_payload_type = 43;
+ config.encoder_factory = MockAudioEncoderFactory::CreateUnusedFactory();
+ config.rtp.extmap_allow_mixed = true;
+ config.rtp.extensions.push_back(
+ RtpExtension(RtpExtension::kAudioLevelUri, kAudioLevelId));
+ config.rtcp_report_interval_ms = 2500;
+ EXPECT_EQ(
+ "{rtp: {ssrc: 1234, extmap-allow-mixed: true, extensions: [{uri: "
+ "urn:ietf:params:rtp-hdrext:ssrc-audio-level, id: 2}], "
+ "c_name: foo_name}, rtcp_report_interval_ms: 2500, "
+ "send_transport: null, "
+ "min_bitrate_bps: 12000, max_bitrate_bps: 34000, has "
+ "audio_network_adaptor_config: false, has_dscp: true, "
+ "send_codec_spec: {nack_enabled: true, transport_cc_enabled: false, "
+ "enable_non_sender_rtt: false, cng_payload_type: 42, "
+ "red_payload_type: 43, payload_type: 103, "
+ "format: {name: isac, clockrate_hz: 16000, num_channels: 1, "
+ "parameters: {}}}}",
+ config.ToString());
+}
+
+TEST(AudioSendStreamTest, ConstructDestruct) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ }
+}
+
+TEST(AudioSendStreamTest, SendTelephoneEvent) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ helper.SetupMockForSendTelephoneEvent();
+ EXPECT_TRUE(send_stream->SendTelephoneEvent(
+ kTelephoneEventPayloadType, kTelephoneEventPayloadFrequency,
+ kTelephoneEventCode, kTelephoneEventDuration));
+ }
+}
+
+TEST(AudioSendStreamTest, SetMuted) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ EXPECT_CALL(*helper.channel_send(), SetInputMute(true));
+ send_stream->SetMuted(true);
+ }
+}
+
+TEST(AudioSendStreamTest, AudioBweCorrectObjectsOnChannelProxy) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ }
+}
+
+TEST(AudioSendStreamTest, NoAudioBweCorrectObjectsOnChannelProxy) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ }
+}
+
+TEST(AudioSendStreamTest, GetStats) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ helper.SetupMockForGetStats(use_null_audio_processing);
+ AudioSendStream::Stats stats = send_stream->GetStats(true);
+ EXPECT_EQ(kSsrc, stats.local_ssrc);
+ EXPECT_EQ(kCallStats.payload_bytes_sent, stats.payload_bytes_sent);
+ EXPECT_EQ(kCallStats.header_and_padding_bytes_sent,
+ stats.header_and_padding_bytes_sent);
+ EXPECT_EQ(kCallStats.packetsSent, stats.packets_sent);
+ EXPECT_EQ(kReportBlock.cumulative_num_packets_lost, stats.packets_lost);
+ EXPECT_EQ(Q8ToFloat(kReportBlock.fraction_lost), stats.fraction_lost);
+ EXPECT_EQ(kIsacFormat.name, stats.codec_name);
+ EXPECT_EQ(static_cast<int32_t>(kReportBlock.interarrival_jitter /
+ (kIsacFormat.clockrate_hz / 1000)),
+ stats.jitter_ms);
+ EXPECT_EQ(kCallStats.rttMs, stats.rtt_ms);
+ EXPECT_EQ(0, stats.audio_level);
+ EXPECT_EQ(0, stats.total_input_energy);
+ EXPECT_EQ(0, stats.total_input_duration);
+
+ if (!use_null_audio_processing) {
+ EXPECT_EQ(kEchoDelayMedian, stats.apm_statistics.delay_median_ms);
+ EXPECT_EQ(kEchoDelayStdDev,
+ stats.apm_statistics.delay_standard_deviation_ms);
+ EXPECT_EQ(kEchoReturnLoss, stats.apm_statistics.echo_return_loss);
+ EXPECT_EQ(kEchoReturnLossEnhancement,
+ stats.apm_statistics.echo_return_loss_enhancement);
+ EXPECT_EQ(kDivergentFilterFraction,
+ stats.apm_statistics.divergent_filter_fraction);
+ EXPECT_EQ(kResidualEchoLikelihood,
+ stats.apm_statistics.residual_echo_likelihood);
+ EXPECT_EQ(kResidualEchoLikelihoodMax,
+ stats.apm_statistics.residual_echo_likelihood_recent_max);
+ }
+ }
+}
+
+TEST(AudioSendStreamTest, GetStatsAudioLevel) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ helper.SetupMockForGetStats(use_null_audio_processing);
+ EXPECT_CALL(*helper.channel_send(), ProcessAndEncodeAudio)
+ .Times(AnyNumber());
+
+ constexpr int kSampleRateHz = 48000;
+ constexpr size_t kNumChannels = 1;
+
+ constexpr int16_t kSilentAudioLevel = 0;
+ constexpr int16_t kMaxAudioLevel = 32767; // Audio level is [0,32767].
+ constexpr int kAudioFrameDurationMs = 10;
+
+ // Process 10 audio frames (100 ms) of silence. After this, on the next
+ // (11-th) frame, the audio level will be updated with the maximum audio
+ // level of the first 11 frames. See AudioLevel.
+ for (size_t i = 0; i < 10; ++i) {
+ send_stream->SendAudioData(
+ CreateAudioFrame1kHzSineWave(kSilentAudioLevel, kAudioFrameDurationMs,
+ kSampleRateHz, kNumChannels));
+ }
+ AudioSendStream::Stats stats = send_stream->GetStats();
+ EXPECT_EQ(kSilentAudioLevel, stats.audio_level);
+ EXPECT_NEAR(0.0f, stats.total_input_energy, kTolerance);
+ EXPECT_NEAR(0.1f, stats.total_input_duration,
+ kTolerance); // 100 ms = 0.1 s
+
+ // Process 10 audio frames (100 ms) of maximum audio level.
+ // Note that AudioLevel updates the audio level every 11th frame, processing
+ // 10 frames above was needed to see a non-zero audio level here.
+ for (size_t i = 0; i < 10; ++i) {
+ send_stream->SendAudioData(CreateAudioFrame1kHzSineWave(
+ kMaxAudioLevel, kAudioFrameDurationMs, kSampleRateHz, kNumChannels));
+ }
+ stats = send_stream->GetStats();
+ EXPECT_EQ(kMaxAudioLevel, stats.audio_level);
+ // Energy increases by energy*duration, where energy is audio level in
+ // [0,1].
+ EXPECT_NEAR(0.1f, stats.total_input_energy, kTolerance); // 0.1 s of max
+ EXPECT_NEAR(0.2f, stats.total_input_duration,
+ kTolerance); // 200 ms = 0.2 s
+ }
+}
+
+TEST(AudioSendStreamTest, SendCodecAppliesAudioNetworkAdaptor) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ helper.config().send_codec_spec =
+ AudioSendStream::Config::SendCodecSpec(0, kOpusFormat);
+ const std::string kAnaConfigString = "abcde";
+ const std::string kAnaReconfigString = "12345";
+
+ helper.config().audio_network_adaptor_config = kAnaConfigString;
+
+ EXPECT_CALL(helper.mock_encoder_factory(), MakeAudioEncoderMock(_, _, _, _))
+ .WillOnce(Invoke([&kAnaConfigString, &kAnaReconfigString](
+ int payload_type, const SdpAudioFormat& format,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ std::unique_ptr<AudioEncoder>* return_value) {
+ auto mock_encoder = SetupAudioEncoderMock(payload_type, format);
+ EXPECT_CALL(*mock_encoder,
+ EnableAudioNetworkAdaptor(StrEq(kAnaConfigString), _))
+ .WillOnce(Return(true));
+ EXPECT_CALL(*mock_encoder,
+ EnableAudioNetworkAdaptor(StrEq(kAnaReconfigString), _))
+ .WillOnce(Return(true));
+ *return_value = std::move(mock_encoder);
+ }));
+
+ auto send_stream = helper.CreateAudioSendStream();
+
+ auto stream_config = helper.config();
+ stream_config.audio_network_adaptor_config = kAnaReconfigString;
+
+ send_stream->Reconfigure(stream_config, nullptr);
+ }
+}
+
+TEST(AudioSendStreamTest, AudioNetworkAdaptorReceivesOverhead) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ helper.config().send_codec_spec =
+ AudioSendStream::Config::SendCodecSpec(0, kOpusFormat);
+ const std::string kAnaConfigString = "abcde";
+
+ EXPECT_CALL(helper.mock_encoder_factory(), MakeAudioEncoderMock(_, _, _, _))
+ .WillOnce(Invoke(
+ [&kAnaConfigString](int payload_type, const SdpAudioFormat& format,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ std::unique_ptr<AudioEncoder>* return_value) {
+ auto mock_encoder = SetupAudioEncoderMock(payload_type, format);
+ InSequence s;
+ EXPECT_CALL(
+ *mock_encoder,
+ OnReceivedOverhead(Eq(kOverheadPerPacket.bytes<size_t>())))
+ .Times(2);
+ EXPECT_CALL(*mock_encoder,
+ EnableAudioNetworkAdaptor(StrEq(kAnaConfigString), _))
+ .WillOnce(Return(true));
+ // Note: Overhead is received AFTER ANA has been enabled.
+ EXPECT_CALL(
+ *mock_encoder,
+ OnReceivedOverhead(Eq(kOverheadPerPacket.bytes<size_t>())))
+ .WillOnce(Return());
+ *return_value = std::move(mock_encoder);
+ }));
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(kOverheadPerPacket.bytes<size_t>()));
+
+ auto send_stream = helper.CreateAudioSendStream();
+
+ auto stream_config = helper.config();
+ stream_config.audio_network_adaptor_config = kAnaConfigString;
+
+ send_stream->Reconfigure(stream_config, nullptr);
+ }
+}
+
+// VAD is applied when codec is mono and the CNG frequency matches the codec
+// clock rate.
+TEST(AudioSendStreamTest, SendCodecCanApplyVad) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, false, use_null_audio_processing);
+ helper.config().send_codec_spec =
+ AudioSendStream::Config::SendCodecSpec(9, kG722Format);
+ helper.config().send_codec_spec->cng_payload_type = 105;
+ std::unique_ptr<AudioEncoder> stolen_encoder;
+ EXPECT_CALL(*helper.channel_send(), SetEncoder)
+ .WillOnce([&stolen_encoder](int payload_type,
+ std::unique_ptr<AudioEncoder> encoder) {
+ stolen_encoder = std::move(encoder);
+ return true;
+ });
+ EXPECT_CALL(*helper.channel_send(), RegisterCngPayloadType(105, 8000));
+
+ auto send_stream = helper.CreateAudioSendStream();
+
+ // We cannot truly determine if the encoder created is an AudioEncoderCng.
+ // It is the only reasonable implementation that will return something from
+ // ReclaimContainedEncoders, though.
+ ASSERT_TRUE(stolen_encoder);
+ EXPECT_FALSE(stolen_encoder->ReclaimContainedEncoders().empty());
+ }
+}
+
+TEST(AudioSendStreamTest, DoesNotPassHigherBitrateThanMaxBitrate) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ EXPECT_CALL(
+ *helper.channel_send(),
+ OnBitrateAllocation(
+ Field(&BitrateAllocationUpdate::target_bitrate,
+ Eq(DataRate::BitsPerSec(helper.config().max_bitrate_bps)))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate =
+ DataRate::BitsPerSec(helper.config().max_bitrate_bps + 5000);
+ update.packet_loss_ratio = 0;
+ update.round_trip_time = TimeDelta::Millis(50);
+ update.bwe_period = TimeDelta::Millis(6000);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, SSBweTargetInRangeRespected) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ EXPECT_CALL(
+ *helper.channel_send(),
+ OnBitrateAllocation(Field(
+ &BitrateAllocationUpdate::target_bitrate,
+ Eq(DataRate::BitsPerSec(helper.config().max_bitrate_bps - 5000)))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate =
+ DataRate::BitsPerSec(helper.config().max_bitrate_bps - 5000);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, SSBweFieldTrialMinRespected) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ ScopedKeyValueConfig field_trials(
+ helper.field_trials, "WebRTC-Audio-Allocation/min:6kbps,max:64kbps/");
+ auto send_stream = helper.CreateAudioSendStream();
+ EXPECT_CALL(
+ *helper.channel_send(),
+ OnBitrateAllocation(Field(&BitrateAllocationUpdate::target_bitrate,
+ Eq(DataRate::KilobitsPerSec(6)))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate = DataRate::KilobitsPerSec(1);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, SSBweFieldTrialMaxRespected) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ ScopedKeyValueConfig field_trials(
+ helper.field_trials, "WebRTC-Audio-Allocation/min:6kbps,max:64kbps/");
+ auto send_stream = helper.CreateAudioSendStream();
+ EXPECT_CALL(
+ *helper.channel_send(),
+ OnBitrateAllocation(Field(&BitrateAllocationUpdate::target_bitrate,
+ Eq(DataRate::KilobitsPerSec(64)))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate = DataRate::KilobitsPerSec(128);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, SSBweWithOverhead) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ ScopedKeyValueConfig field_trials(helper.field_trials,
+ "WebRTC-Audio-LegacyOverhead/Disabled/");
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(kOverheadPerPacket.bytes<size_t>()));
+ auto send_stream = helper.CreateAudioSendStream();
+ const DataRate bitrate =
+ DataRate::BitsPerSec(helper.config().max_bitrate_bps) +
+ kMaxOverheadRate;
+ EXPECT_CALL(*helper.channel_send(),
+ OnBitrateAllocation(Field(
+ &BitrateAllocationUpdate::target_bitrate, Eq(bitrate))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate = bitrate;
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, SSBweWithOverheadMinRespected) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ ScopedKeyValueConfig field_trials(
+ helper.field_trials,
+ "WebRTC-Audio-LegacyOverhead/Disabled/"
+ "WebRTC-Audio-Allocation/min:6kbps,max:64kbps/");
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(kOverheadPerPacket.bytes<size_t>()));
+ auto send_stream = helper.CreateAudioSendStream();
+ const DataRate bitrate = DataRate::KilobitsPerSec(6) + kMinOverheadRate;
+ EXPECT_CALL(*helper.channel_send(),
+ OnBitrateAllocation(Field(
+ &BitrateAllocationUpdate::target_bitrate, Eq(bitrate))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate = DataRate::KilobitsPerSec(1);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, SSBweWithOverheadMaxRespected) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(true, true, use_null_audio_processing);
+ ScopedKeyValueConfig field_trials(
+ helper.field_trials,
+ "WebRTC-Audio-LegacyOverhead/Disabled/"
+ "WebRTC-Audio-Allocation/min:6kbps,max:64kbps/");
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(kOverheadPerPacket.bytes<size_t>()));
+ auto send_stream = helper.CreateAudioSendStream();
+ const DataRate bitrate = DataRate::KilobitsPerSec(64) + kMaxOverheadRate;
+ EXPECT_CALL(*helper.channel_send(),
+ OnBitrateAllocation(Field(
+ &BitrateAllocationUpdate::target_bitrate, Eq(bitrate))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate = DataRate::KilobitsPerSec(128);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+TEST(AudioSendStreamTest, ProbingIntervalOnBitrateUpdated) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+
+ EXPECT_CALL(*helper.channel_send(),
+ OnBitrateAllocation(Field(&BitrateAllocationUpdate::bwe_period,
+ Eq(TimeDelta::Millis(5000)))));
+ BitrateAllocationUpdate update;
+ update.target_bitrate =
+ DataRate::BitsPerSec(helper.config().max_bitrate_bps + 5000);
+ update.packet_loss_ratio = 0;
+ update.round_trip_time = TimeDelta::Millis(50);
+ update.bwe_period = TimeDelta::Millis(5000);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+ }
+}
+
+// Test that AudioSendStream doesn't recreate the encoder unnecessarily.
+TEST(AudioSendStreamTest, DontRecreateEncoder) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, false, use_null_audio_processing);
+ // WillOnce is (currently) the default used by ConfigHelper if asked to set
+ // an expectation for SetEncoder. Since this behavior is essential for this
+ // test to be correct, it's instead set-up manually here. Otherwise a simple
+ // change to ConfigHelper (say to WillRepeatedly) would silently make this
+ // test useless.
+ EXPECT_CALL(*helper.channel_send(), SetEncoder).WillOnce(Return());
+
+ EXPECT_CALL(*helper.channel_send(), RegisterCngPayloadType(105, 8000));
+
+ helper.config().send_codec_spec =
+ AudioSendStream::Config::SendCodecSpec(9, kG722Format);
+ helper.config().send_codec_spec->cng_payload_type = 105;
+ auto send_stream = helper.CreateAudioSendStream();
+ send_stream->Reconfigure(helper.config(), nullptr);
+ }
+}
+
+TEST(AudioSendStreamTest, ReconfigureTransportCcResetsFirst) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+ ConfigHelper::AddBweToConfig(&new_config);
+
+ EXPECT_CALL(*helper.rtp_rtcp(),
+ RegisterRtpHeaderExtension(TransportSequenceNumber::Uri(),
+ kTransportSequenceNumberId))
+ .Times(1);
+ {
+ ::testing::InSequence seq;
+ EXPECT_CALL(*helper.channel_send(), ResetSenderCongestionControlObjects())
+ .Times(1);
+ EXPECT_CALL(*helper.channel_send(),
+ RegisterSenderCongestionControlObjects(helper.transport(),
+ Ne(nullptr)))
+ .Times(1);
+ }
+
+ send_stream->Reconfigure(new_config, nullptr);
+ }
+}
+
+TEST(AudioSendStreamTest, OnTransportOverheadChanged) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+
+ // CallEncoder will be called on overhead change.
+ EXPECT_CALL(*helper.channel_send(), CallEncoder);
+
+ const size_t transport_overhead_per_packet_bytes = 333;
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
+
+ EXPECT_EQ(transport_overhead_per_packet_bytes,
+ send_stream->TestOnlyGetPerPacketOverheadBytes());
+ }
+}
+
+TEST(AudioSendStreamTest, DoesntCallEncoderWhenOverheadUnchanged) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+
+ // CallEncoder will be called on overhead change.
+ EXPECT_CALL(*helper.channel_send(), CallEncoder);
+ const size_t transport_overhead_per_packet_bytes = 333;
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
+
+ // Set the same overhead again, CallEncoder should not be called again.
+ EXPECT_CALL(*helper.channel_send(), CallEncoder).Times(0);
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
+
+ // New overhead, call CallEncoder again
+ EXPECT_CALL(*helper.channel_send(), CallEncoder);
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes + 1);
+ }
+}
+
+TEST(AudioSendStreamTest, AudioOverheadChanged) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ const size_t audio_overhead_per_packet_bytes = 555;
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(audio_overhead_per_packet_bytes));
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+
+ BitrateAllocationUpdate update;
+ update.target_bitrate =
+ DataRate::BitsPerSec(helper.config().max_bitrate_bps) +
+ kMaxOverheadRate;
+ EXPECT_CALL(*helper.channel_send(), OnBitrateAllocation);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+
+ EXPECT_EQ(audio_overhead_per_packet_bytes,
+ send_stream->TestOnlyGetPerPacketOverheadBytes());
+
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(audio_overhead_per_packet_bytes + 20));
+ EXPECT_CALL(*helper.channel_send(), OnBitrateAllocation);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+
+ EXPECT_EQ(audio_overhead_per_packet_bytes + 20,
+ send_stream->TestOnlyGetPerPacketOverheadBytes());
+ }
+}
+
+TEST(AudioSendStreamTest, OnAudioAndTransportOverheadChanged) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ const size_t audio_overhead_per_packet_bytes = 555;
+ EXPECT_CALL(*helper.rtp_rtcp(), ExpectedPerPacketOverhead)
+ .WillRepeatedly(Return(audio_overhead_per_packet_bytes));
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+
+ const size_t transport_overhead_per_packet_bytes = 333;
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
+
+ BitrateAllocationUpdate update;
+ update.target_bitrate =
+ DataRate::BitsPerSec(helper.config().max_bitrate_bps) +
+ kMaxOverheadRate;
+ EXPECT_CALL(*helper.channel_send(), OnBitrateAllocation);
+ helper.worker()->RunSynchronous(
+ [&] { send_stream->OnBitrateUpdated(update); });
+
+ EXPECT_EQ(
+ transport_overhead_per_packet_bytes + audio_overhead_per_packet_bytes,
+ send_stream->TestOnlyGetPerPacketOverheadBytes());
+ }
+}
+
+// Validates that reconfiguring the AudioSendStream with a Frame encryptor
+// correctly reconfigures on the object without crashing.
+TEST(AudioSendStreamTest, ReconfigureWithFrameEncryptor) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+
+ rtc::scoped_refptr<FrameEncryptorInterface> mock_frame_encryptor_0(
+ rtc::make_ref_counted<MockFrameEncryptor>());
+ new_config.frame_encryptor = mock_frame_encryptor_0;
+ EXPECT_CALL(*helper.channel_send(), SetFrameEncryptor(Ne(nullptr)))
+ .Times(1);
+ send_stream->Reconfigure(new_config, nullptr);
+
+ // Not updating the frame encryptor shouldn't force it to reconfigure.
+ EXPECT_CALL(*helper.channel_send(), SetFrameEncryptor(_)).Times(0);
+ send_stream->Reconfigure(new_config, nullptr);
+
+ // Updating frame encryptor to a new object should force a call to the
+ // proxy.
+ rtc::scoped_refptr<FrameEncryptorInterface> mock_frame_encryptor_1(
+ rtc::make_ref_counted<MockFrameEncryptor>());
+ new_config.frame_encryptor = mock_frame_encryptor_1;
+ new_config.crypto_options.sframe.require_frame_encryption = true;
+ EXPECT_CALL(*helper.channel_send(), SetFrameEncryptor(Ne(nullptr)))
+ .Times(1);
+ send_stream->Reconfigure(new_config, nullptr);
+ }
+}
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_state.cc b/third_party/libwebrtc/audio/audio_state.cc
new file mode 100644
index 0000000000..76ff152eea
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_state.cc
@@ -0,0 +1,213 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_state.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "api/sequence_checker.h"
+#include "api/task_queue/task_queue_base.h"
+#include "api/units/time_delta.h"
+#include "audio/audio_receive_stream.h"
+#include "audio/audio_send_stream.h"
+#include "modules/audio_device/include/audio_device.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+namespace internal {
+
+AudioState::AudioState(const AudioState::Config& config)
+ : config_(config),
+ audio_transport_(config_.audio_mixer.get(),
+ config_.audio_processing.get(),
+ config_.async_audio_processing_factory.get()) {
+ process_thread_checker_.Detach();
+ RTC_DCHECK(config_.audio_mixer);
+ RTC_DCHECK(config_.audio_device_module);
+}
+
+AudioState::~AudioState() {
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ RTC_DCHECK(receiving_streams_.empty());
+ RTC_DCHECK(sending_streams_.empty());
+ RTC_DCHECK(!null_audio_poller_.Running());
+}
+
+AudioProcessing* AudioState::audio_processing() {
+ return config_.audio_processing.get();
+}
+
+AudioTransport* AudioState::audio_transport() {
+ return &audio_transport_;
+}
+
+void AudioState::AddReceivingStream(
+ webrtc::AudioReceiveStreamInterface* stream) {
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ RTC_DCHECK_EQ(0, receiving_streams_.count(stream));
+ receiving_streams_.insert(stream);
+ if (!config_.audio_mixer->AddSource(
+ static_cast<AudioReceiveStreamImpl*>(stream))) {
+ RTC_DLOG(LS_ERROR) << "Failed to add source to mixer.";
+ }
+
+ // Make sure playback is initialized; start playing if enabled.
+ UpdateNullAudioPollerState();
+ auto* adm = config_.audio_device_module.get();
+ if (!adm->Playing()) {
+ if (adm->InitPlayout() == 0) {
+ if (playout_enabled_) {
+ adm->StartPlayout();
+ }
+ } else {
+ RTC_DLOG_F(LS_ERROR) << "Failed to initialize playout.";
+ }
+ }
+}
+
+void AudioState::RemoveReceivingStream(
+ webrtc::AudioReceiveStreamInterface* stream) {
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ auto count = receiving_streams_.erase(stream);
+ RTC_DCHECK_EQ(1, count);
+ config_.audio_mixer->RemoveSource(
+ static_cast<AudioReceiveStreamImpl*>(stream));
+ UpdateNullAudioPollerState();
+ if (receiving_streams_.empty()) {
+ config_.audio_device_module->StopPlayout();
+ }
+}
+
+void AudioState::AddSendingStream(webrtc::AudioSendStream* stream,
+ int sample_rate_hz,
+ size_t num_channels) {
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ auto& properties = sending_streams_[stream];
+ properties.sample_rate_hz = sample_rate_hz;
+ properties.num_channels = num_channels;
+ UpdateAudioTransportWithSendingStreams();
+
+ // Make sure recording is initialized; start recording if enabled.
+ auto* adm = config_.audio_device_module.get();
+ if (!adm->Recording()) {
+ if (adm->InitRecording() == 0) {
+ if (recording_enabled_) {
+ adm->StartRecording();
+ }
+ } else {
+ RTC_DLOG_F(LS_ERROR) << "Failed to initialize recording.";
+ }
+ }
+}
+
+void AudioState::RemoveSendingStream(webrtc::AudioSendStream* stream) {
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ auto count = sending_streams_.erase(stream);
+ RTC_DCHECK_EQ(1, count);
+ UpdateAudioTransportWithSendingStreams();
+ if (sending_streams_.empty()) {
+ config_.audio_device_module->StopRecording();
+ }
+}
+
+void AudioState::SetPlayout(bool enabled) {
+ RTC_LOG(LS_INFO) << "SetPlayout(" << enabled << ")";
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ if (playout_enabled_ != enabled) {
+ playout_enabled_ = enabled;
+ if (enabled) {
+ UpdateNullAudioPollerState();
+ if (!receiving_streams_.empty()) {
+ config_.audio_device_module->StartPlayout();
+ }
+ } else {
+ config_.audio_device_module->StopPlayout();
+ UpdateNullAudioPollerState();
+ }
+ }
+}
+
+void AudioState::SetRecording(bool enabled) {
+ RTC_LOG(LS_INFO) << "SetRecording(" << enabled << ")";
+ RTC_DCHECK_RUN_ON(&thread_checker_);
+ if (recording_enabled_ != enabled) {
+ recording_enabled_ = enabled;
+ if (enabled) {
+ if (!sending_streams_.empty()) {
+ config_.audio_device_module->StartRecording();
+ }
+ } else {
+ config_.audio_device_module->StopRecording();
+ }
+ }
+}
+
+void AudioState::SetStereoChannelSwapping(bool enable) {
+ RTC_DCHECK(thread_checker_.IsCurrent());
+ audio_transport_.SetStereoChannelSwapping(enable);
+}
+
+void AudioState::UpdateAudioTransportWithSendingStreams() {
+ RTC_DCHECK(thread_checker_.IsCurrent());
+ std::vector<AudioSender*> audio_senders;
+ int max_sample_rate_hz = 8000;
+ size_t max_num_channels = 1;
+ for (const auto& kv : sending_streams_) {
+ audio_senders.push_back(kv.first);
+ max_sample_rate_hz = std::max(max_sample_rate_hz, kv.second.sample_rate_hz);
+ max_num_channels = std::max(max_num_channels, kv.second.num_channels);
+ }
+ audio_transport_.UpdateAudioSenders(std::move(audio_senders),
+ max_sample_rate_hz, max_num_channels);
+}
+
+void AudioState::UpdateNullAudioPollerState() {
+ // Run NullAudioPoller when there are receiving streams and playout is
+ // disabled.
+ if (!receiving_streams_.empty() && !playout_enabled_) {
+ if (!null_audio_poller_.Running()) {
+ AudioTransport* audio_transport = &audio_transport_;
+ null_audio_poller_ = RepeatingTaskHandle::Start(
+ TaskQueueBase::Current(), [audio_transport] {
+ static constexpr size_t kNumChannels = 1;
+ static constexpr uint32_t kSamplesPerSecond = 48'000;
+ // 10ms of samples
+ static constexpr size_t kNumSamples = kSamplesPerSecond / 100;
+
+ // Buffer to hold the audio samples.
+ int16_t buffer[kNumSamples * kNumChannels];
+
+ // Output variables from `NeedMorePlayData`.
+ size_t n_samples;
+ int64_t elapsed_time_ms;
+ int64_t ntp_time_ms;
+ audio_transport->NeedMorePlayData(
+ kNumSamples, sizeof(int16_t), kNumChannels, kSamplesPerSecond,
+ buffer, n_samples, &elapsed_time_ms, &ntp_time_ms);
+
+ // Reschedule the next poll iteration.
+ return TimeDelta::Millis(10);
+ });
+ }
+ } else {
+ null_audio_poller_.Stop();
+ }
+}
+} // namespace internal
+
+rtc::scoped_refptr<AudioState> AudioState::Create(
+ const AudioState::Config& config) {
+ return rtc::make_ref_counted<internal::AudioState>(config);
+}
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_state.h b/third_party/libwebrtc/audio/audio_state.h
new file mode 100644
index 0000000000..6c2b7aa453
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_state.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_AUDIO_STATE_H_
+#define AUDIO_AUDIO_STATE_H_
+
+#include <map>
+#include <memory>
+
+#include "api/sequence_checker.h"
+#include "audio/audio_transport_impl.h"
+#include "call/audio_state.h"
+#include "rtc_base/containers/flat_set.h"
+#include "rtc_base/ref_count.h"
+#include "rtc_base/task_utils/repeating_task.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace webrtc {
+
+class AudioSendStream;
+class AudioReceiveStreamInterface;
+
+namespace internal {
+
+class AudioState : public webrtc::AudioState {
+ public:
+ explicit AudioState(const AudioState::Config& config);
+
+ AudioState() = delete;
+ AudioState(const AudioState&) = delete;
+ AudioState& operator=(const AudioState&) = delete;
+
+ ~AudioState() override;
+
+ AudioProcessing* audio_processing() override;
+ AudioTransport* audio_transport() override;
+
+ void SetPlayout(bool enabled) override;
+ void SetRecording(bool enabled) override;
+
+ void SetStereoChannelSwapping(bool enable) override;
+
+ AudioDeviceModule* audio_device_module() {
+ RTC_DCHECK(config_.audio_device_module);
+ return config_.audio_device_module.get();
+ }
+
+ void AddReceivingStream(webrtc::AudioReceiveStreamInterface* stream);
+ void RemoveReceivingStream(webrtc::AudioReceiveStreamInterface* stream);
+
+ void AddSendingStream(webrtc::AudioSendStream* stream,
+ int sample_rate_hz,
+ size_t num_channels);
+ void RemoveSendingStream(webrtc::AudioSendStream* stream);
+
+ private:
+ void UpdateAudioTransportWithSendingStreams();
+ void UpdateNullAudioPollerState() RTC_RUN_ON(&thread_checker_);
+
+ SequenceChecker thread_checker_;
+ SequenceChecker process_thread_checker_;
+ const webrtc::AudioState::Config config_;
+ bool recording_enabled_ = true;
+ bool playout_enabled_ = true;
+
+ // Transports mixed audio from the mixer to the audio device and
+ // recorded audio to the sending streams.
+ AudioTransportImpl audio_transport_;
+
+ // Null audio poller is used to continue polling the audio streams if audio
+ // playout is disabled so that audio processing still happens and the audio
+ // stats are still updated.
+ RepeatingTaskHandle null_audio_poller_ RTC_GUARDED_BY(&thread_checker_);
+
+ webrtc::flat_set<webrtc::AudioReceiveStreamInterface*> receiving_streams_;
+ struct StreamProperties {
+ int sample_rate_hz = 0;
+ size_t num_channels = 0;
+ };
+ std::map<webrtc::AudioSendStream*, StreamProperties> sending_streams_;
+};
+} // namespace internal
+} // namespace webrtc
+
+#endif // AUDIO_AUDIO_STATE_H_
diff --git a/third_party/libwebrtc/audio/audio_state_unittest.cc b/third_party/libwebrtc/audio/audio_state_unittest.cc
new file mode 100644
index 0000000000..4426a782d7
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_state_unittest.cc
@@ -0,0 +1,366 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_state.h"
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "api/task_queue/test/mock_task_queue_base.h"
+#include "call/test/mock_audio_send_stream.h"
+#include "modules/audio_device/include/mock_audio_device.h"
+#include "modules/audio_mixer/audio_mixer_impl.h"
+#include "modules/audio_processing/include/mock_audio_processing.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+using ::testing::_;
+using ::testing::Matcher;
+using ::testing::NiceMock;
+using ::testing::StrictMock;
+using ::testing::Values;
+
+constexpr int kSampleRate = 16000;
+constexpr int kNumberOfChannels = 1;
+
+struct FakeAsyncAudioProcessingHelper {
+ class FakeTaskQueue : public StrictMock<MockTaskQueueBase> {
+ public:
+ FakeTaskQueue() = default;
+
+ void Delete() override { delete this; }
+ void PostTask(absl::AnyInvocable<void() &&> task) override {
+ std::move(task)();
+ }
+ };
+
+ class FakeTaskQueueFactory : public TaskQueueFactory {
+ public:
+ FakeTaskQueueFactory() = default;
+ ~FakeTaskQueueFactory() override = default;
+ std::unique_ptr<TaskQueueBase, TaskQueueDeleter> CreateTaskQueue(
+ absl::string_view name,
+ Priority priority) const override {
+ return std::unique_ptr<webrtc::TaskQueueBase, webrtc::TaskQueueDeleter>(
+ new FakeTaskQueue());
+ }
+ };
+
+ class MockAudioFrameProcessor : public AudioFrameProcessor {
+ public:
+ ~MockAudioFrameProcessor() override = default;
+
+ MOCK_METHOD(void, ProcessCalled, ());
+ MOCK_METHOD(void, SinkSet, ());
+ MOCK_METHOD(void, SinkCleared, ());
+
+ void Process(std::unique_ptr<AudioFrame> frame) override {
+ ProcessCalled();
+ sink_callback_(std::move(frame));
+ }
+
+ void SetSink(OnAudioFrameCallback sink_callback) override {
+ sink_callback_ = std::move(sink_callback);
+ if (sink_callback_ == nullptr)
+ SinkCleared();
+ else
+ SinkSet();
+ }
+
+ private:
+ OnAudioFrameCallback sink_callback_;
+ };
+
+ NiceMock<MockAudioFrameProcessor> audio_frame_processor_;
+ FakeTaskQueueFactory task_queue_factory_;
+
+ rtc::scoped_refptr<AsyncAudioProcessing::Factory> CreateFactory() {
+ return rtc::make_ref_counted<AsyncAudioProcessing::Factory>(
+ audio_frame_processor_, task_queue_factory_);
+ }
+};
+
+struct ConfigHelper {
+ struct Params {
+ bool use_null_audio_processing;
+ bool use_async_audio_processing;
+ };
+
+ explicit ConfigHelper(const Params& params)
+ : audio_mixer(AudioMixerImpl::Create()) {
+ audio_state_config.audio_mixer = audio_mixer;
+ audio_state_config.audio_processing =
+ params.use_null_audio_processing
+ ? nullptr
+ : rtc::make_ref_counted<testing::NiceMock<MockAudioProcessing>>();
+ audio_state_config.audio_device_module =
+ rtc::make_ref_counted<NiceMock<MockAudioDeviceModule>>();
+ if (params.use_async_audio_processing) {
+ audio_state_config.async_audio_processing_factory =
+ async_audio_processing_helper_.CreateFactory();
+ }
+ }
+ AudioState::Config& config() { return audio_state_config; }
+ rtc::scoped_refptr<AudioMixer> mixer() { return audio_mixer; }
+ NiceMock<FakeAsyncAudioProcessingHelper::MockAudioFrameProcessor>&
+ mock_audio_frame_processor() {
+ return async_audio_processing_helper_.audio_frame_processor_;
+ }
+
+ private:
+ AudioState::Config audio_state_config;
+ rtc::scoped_refptr<AudioMixer> audio_mixer;
+ FakeAsyncAudioProcessingHelper async_audio_processing_helper_;
+};
+
+class FakeAudioSource : public AudioMixer::Source {
+ public:
+ // TODO(aleloi): Valid overrides commented out, because the gmock
+ // methods don't use any override declarations, and we want to avoid
+ // warnings from -Winconsistent-missing-override. See
+ // http://crbug.com/428099.
+ int Ssrc() const /*override*/ { return 0; }
+
+ int PreferredSampleRate() const /*override*/ { return kSampleRate; }
+
+ MOCK_METHOD(AudioFrameInfo,
+ GetAudioFrameWithInfo,
+ (int sample_rate_hz, AudioFrame*),
+ (override));
+};
+
+std::vector<int16_t> Create10msTestData(int sample_rate_hz,
+ size_t num_channels) {
+ const int samples_per_channel = sample_rate_hz / 100;
+ std::vector<int16_t> audio_data(samples_per_channel * num_channels, 0);
+ // Fill the first channel with a 1kHz sine wave.
+ const float inc = (2 * 3.14159265f * 1000) / sample_rate_hz;
+ float w = 0.f;
+ for (int i = 0; i < samples_per_channel; ++i) {
+ audio_data[i * num_channels] = static_cast<int16_t>(32767.f * std::sin(w));
+ w += inc;
+ }
+ return audio_data;
+}
+
+std::vector<uint32_t> ComputeChannelLevels(AudioFrame* audio_frame) {
+ const size_t num_channels = audio_frame->num_channels_;
+ const size_t samples_per_channel = audio_frame->samples_per_channel_;
+ std::vector<uint32_t> levels(num_channels, 0);
+ for (size_t i = 0; i < samples_per_channel; ++i) {
+ for (size_t j = 0; j < num_channels; ++j) {
+ levels[j] += std::abs(audio_frame->data()[i * num_channels + j]);
+ }
+ }
+ return levels;
+}
+} // namespace
+
+class AudioStateTest : public ::testing::TestWithParam<ConfigHelper::Params> {};
+
+TEST_P(AudioStateTest, Create) {
+ ConfigHelper helper(GetParam());
+ auto audio_state = AudioState::Create(helper.config());
+ EXPECT_TRUE(audio_state.get());
+}
+
+TEST_P(AudioStateTest, ConstructDestruct) {
+ ConfigHelper helper(GetParam());
+ rtc::scoped_refptr<internal::AudioState> audio_state(
+ rtc::make_ref_counted<internal::AudioState>(helper.config()));
+}
+
+TEST_P(AudioStateTest, RecordedAudioArrivesAtSingleStream) {
+ ConfigHelper helper(GetParam());
+
+ if (GetParam().use_async_audio_processing) {
+ EXPECT_CALL(helper.mock_audio_frame_processor(), SinkSet);
+ EXPECT_CALL(helper.mock_audio_frame_processor(), ProcessCalled);
+ EXPECT_CALL(helper.mock_audio_frame_processor(), SinkCleared);
+ }
+
+ rtc::scoped_refptr<internal::AudioState> audio_state(
+ rtc::make_ref_counted<internal::AudioState>(helper.config()));
+
+ MockAudioSendStream stream;
+ audio_state->AddSendingStream(&stream, 8000, 2);
+
+ EXPECT_CALL(
+ stream,
+ SendAudioDataForMock(::testing::AllOf(
+ ::testing::Field(&AudioFrame::sample_rate_hz_, ::testing::Eq(8000)),
+ ::testing::Field(&AudioFrame::num_channels_, ::testing::Eq(2u)))))
+ .WillOnce(
+ // Verify that channels are not swapped by default.
+ ::testing::Invoke([](AudioFrame* audio_frame) {
+ auto levels = ComputeChannelLevels(audio_frame);
+ EXPECT_LT(0u, levels[0]);
+ EXPECT_EQ(0u, levels[1]);
+ }));
+ MockAudioProcessing* ap =
+ GetParam().use_null_audio_processing
+ ? nullptr
+ : static_cast<MockAudioProcessing*>(audio_state->audio_processing());
+ if (ap) {
+ EXPECT_CALL(*ap, set_stream_delay_ms(0));
+ EXPECT_CALL(*ap, set_stream_key_pressed(false));
+ EXPECT_CALL(*ap, ProcessStream(_, _, _, Matcher<int16_t*>(_)));
+ }
+
+ constexpr int kSampleRate = 16000;
+ constexpr size_t kNumChannels = 2;
+ auto audio_data = Create10msTestData(kSampleRate, kNumChannels);
+ uint32_t new_mic_level = 667;
+ audio_state->audio_transport()->RecordedDataIsAvailable(
+ &audio_data[0], kSampleRate / 100, kNumChannels * 2, kNumChannels,
+ kSampleRate, 0, 0, 0, false, new_mic_level);
+ EXPECT_EQ(667u, new_mic_level);
+
+ audio_state->RemoveSendingStream(&stream);
+}
+
+TEST_P(AudioStateTest, RecordedAudioArrivesAtMultipleStreams) {
+ ConfigHelper helper(GetParam());
+
+ if (GetParam().use_async_audio_processing) {
+ EXPECT_CALL(helper.mock_audio_frame_processor(), SinkSet);
+ EXPECT_CALL(helper.mock_audio_frame_processor(), ProcessCalled);
+ EXPECT_CALL(helper.mock_audio_frame_processor(), SinkCleared);
+ }
+
+ rtc::scoped_refptr<internal::AudioState> audio_state(
+ rtc::make_ref_counted<internal::AudioState>(helper.config()));
+
+ MockAudioSendStream stream_1;
+ MockAudioSendStream stream_2;
+ audio_state->AddSendingStream(&stream_1, 8001, 2);
+ audio_state->AddSendingStream(&stream_2, 32000, 1);
+
+ EXPECT_CALL(
+ stream_1,
+ SendAudioDataForMock(::testing::AllOf(
+ ::testing::Field(&AudioFrame::sample_rate_hz_, ::testing::Eq(16000)),
+ ::testing::Field(&AudioFrame::num_channels_, ::testing::Eq(1u)))))
+ .WillOnce(
+ // Verify that there is output signal.
+ ::testing::Invoke([](AudioFrame* audio_frame) {
+ auto levels = ComputeChannelLevels(audio_frame);
+ EXPECT_LT(0u, levels[0]);
+ }));
+ EXPECT_CALL(
+ stream_2,
+ SendAudioDataForMock(::testing::AllOf(
+ ::testing::Field(&AudioFrame::sample_rate_hz_, ::testing::Eq(16000)),
+ ::testing::Field(&AudioFrame::num_channels_, ::testing::Eq(1u)))))
+ .WillOnce(
+ // Verify that there is output signal.
+ ::testing::Invoke([](AudioFrame* audio_frame) {
+ auto levels = ComputeChannelLevels(audio_frame);
+ EXPECT_LT(0u, levels[0]);
+ }));
+ MockAudioProcessing* ap =
+ static_cast<MockAudioProcessing*>(audio_state->audio_processing());
+ if (ap) {
+ EXPECT_CALL(*ap, set_stream_delay_ms(5));
+ EXPECT_CALL(*ap, set_stream_key_pressed(true));
+ EXPECT_CALL(*ap, ProcessStream(_, _, _, Matcher<int16_t*>(_)));
+ }
+
+ constexpr int kSampleRate = 16000;
+ constexpr size_t kNumChannels = 1;
+ auto audio_data = Create10msTestData(kSampleRate, kNumChannels);
+ uint32_t new_mic_level = 667;
+ audio_state->audio_transport()->RecordedDataIsAvailable(
+ &audio_data[0], kSampleRate / 100, kNumChannels * 2, kNumChannels,
+ kSampleRate, 5, 0, 0, true, new_mic_level);
+ EXPECT_EQ(667u, new_mic_level);
+
+ audio_state->RemoveSendingStream(&stream_1);
+ audio_state->RemoveSendingStream(&stream_2);
+}
+
+TEST_P(AudioStateTest, EnableChannelSwap) {
+ constexpr int kSampleRate = 16000;
+ constexpr size_t kNumChannels = 2;
+
+ ConfigHelper helper(GetParam());
+
+ if (GetParam().use_async_audio_processing) {
+ EXPECT_CALL(helper.mock_audio_frame_processor(), SinkSet);
+ EXPECT_CALL(helper.mock_audio_frame_processor(), ProcessCalled);
+ EXPECT_CALL(helper.mock_audio_frame_processor(), SinkCleared);
+ }
+
+ rtc::scoped_refptr<internal::AudioState> audio_state(
+ rtc::make_ref_counted<internal::AudioState>(helper.config()));
+
+ audio_state->SetStereoChannelSwapping(true);
+
+ MockAudioSendStream stream;
+ audio_state->AddSendingStream(&stream, kSampleRate, kNumChannels);
+
+ EXPECT_CALL(stream, SendAudioDataForMock(_))
+ .WillOnce(
+ // Verify that channels are swapped.
+ ::testing::Invoke([](AudioFrame* audio_frame) {
+ auto levels = ComputeChannelLevels(audio_frame);
+ EXPECT_EQ(0u, levels[0]);
+ EXPECT_LT(0u, levels[1]);
+ }));
+
+ auto audio_data = Create10msTestData(kSampleRate, kNumChannels);
+ uint32_t new_mic_level = 667;
+ audio_state->audio_transport()->RecordedDataIsAvailable(
+ &audio_data[0], kSampleRate / 100, kNumChannels * 2, kNumChannels,
+ kSampleRate, 0, 0, 0, false, new_mic_level);
+ EXPECT_EQ(667u, new_mic_level);
+
+ audio_state->RemoveSendingStream(&stream);
+}
+
+TEST_P(AudioStateTest,
+ QueryingTransportForAudioShouldResultInGetAudioCallOnMixerSource) {
+ ConfigHelper helper(GetParam());
+ auto audio_state = AudioState::Create(helper.config());
+
+ FakeAudioSource fake_source;
+ helper.mixer()->AddSource(&fake_source);
+
+ EXPECT_CALL(fake_source, GetAudioFrameWithInfo(_, _))
+ .WillOnce(
+ ::testing::Invoke([](int sample_rate_hz, AudioFrame* audio_frame) {
+ audio_frame->sample_rate_hz_ = sample_rate_hz;
+ audio_frame->samples_per_channel_ = sample_rate_hz / 100;
+ audio_frame->num_channels_ = kNumberOfChannels;
+ return AudioMixer::Source::AudioFrameInfo::kNormal;
+ }));
+
+ int16_t audio_buffer[kSampleRate / 100 * kNumberOfChannels];
+ size_t n_samples_out;
+ int64_t elapsed_time_ms;
+ int64_t ntp_time_ms;
+ audio_state->audio_transport()->NeedMorePlayData(
+ kSampleRate / 100, kNumberOfChannels * 2, kNumberOfChannels, kSampleRate,
+ audio_buffer, n_samples_out, &elapsed_time_ms, &ntp_time_ms);
+}
+
+INSTANTIATE_TEST_SUITE_P(AudioStateTest,
+ AudioStateTest,
+ Values(ConfigHelper::Params({false, false}),
+ ConfigHelper::Params({true, false}),
+ ConfigHelper::Params({false, true}),
+ ConfigHelper::Params({true, true})));
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_transport_impl.cc b/third_party/libwebrtc/audio/audio_transport_impl.cc
new file mode 100644
index 0000000000..42a81d5b4a
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_transport_impl.cc
@@ -0,0 +1,285 @@
+/*
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/audio_transport_impl.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+
+#include "audio/remix_resample.h"
+#include "audio/utility/audio_frame_operations.h"
+#include "call/audio_sender.h"
+#include "modules/async_audio_processing/async_audio_processing.h"
+#include "modules/audio_processing/include/audio_frame_proxies.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/trace_event.h"
+
+namespace webrtc {
+
+namespace {
+
+// We want to process at the lowest sample rate and channel count possible
+// without losing information. Choose the lowest native rate at least equal to
+// the minimum of input and codec rates, choose lowest channel count, and
+// configure the audio frame.
+void InitializeCaptureFrame(int input_sample_rate,
+ int send_sample_rate_hz,
+ size_t input_num_channels,
+ size_t send_num_channels,
+ AudioFrame* audio_frame) {
+ RTC_DCHECK(audio_frame);
+ int min_processing_rate_hz = std::min(input_sample_rate, send_sample_rate_hz);
+ for (int native_rate_hz : AudioProcessing::kNativeSampleRatesHz) {
+ audio_frame->sample_rate_hz_ = native_rate_hz;
+ if (audio_frame->sample_rate_hz_ >= min_processing_rate_hz) {
+ break;
+ }
+ }
+ audio_frame->num_channels_ = std::min(input_num_channels, send_num_channels);
+}
+
+void ProcessCaptureFrame(uint32_t delay_ms,
+ bool key_pressed,
+ bool swap_stereo_channels,
+ AudioProcessing* audio_processing,
+ AudioFrame* audio_frame) {
+ RTC_DCHECK(audio_frame);
+ if (audio_processing) {
+ audio_processing->set_stream_delay_ms(delay_ms);
+ audio_processing->set_stream_key_pressed(key_pressed);
+ int error = ProcessAudioFrame(audio_processing, audio_frame);
+
+ RTC_DCHECK_EQ(0, error) << "ProcessStream() error: " << error;
+ }
+
+ if (swap_stereo_channels) {
+ AudioFrameOperations::SwapStereoChannels(audio_frame);
+ }
+}
+
+// Resample audio in `frame` to given sample rate preserving the
+// channel count and place the result in `destination`.
+int Resample(const AudioFrame& frame,
+ const int destination_sample_rate,
+ PushResampler<int16_t>* resampler,
+ int16_t* destination) {
+ TRACE_EVENT2("webrtc", "Resample", "frame sample rate", frame.sample_rate_hz_,
+ "destination_sample_rate", destination_sample_rate);
+ const int number_of_channels = static_cast<int>(frame.num_channels_);
+ const int target_number_of_samples_per_channel =
+ destination_sample_rate / 100;
+ resampler->InitializeIfNeeded(frame.sample_rate_hz_, destination_sample_rate,
+ number_of_channels);
+
+ // TODO(yujo): make resampler take an AudioFrame, and add special case
+ // handling of muted frames.
+ return resampler->Resample(
+ frame.data(), frame.samples_per_channel_ * number_of_channels,
+ destination, number_of_channels * target_number_of_samples_per_channel);
+}
+} // namespace
+
+AudioTransportImpl::AudioTransportImpl(
+ AudioMixer* mixer,
+ AudioProcessing* audio_processing,
+ AsyncAudioProcessing::Factory* async_audio_processing_factory)
+ : audio_processing_(audio_processing),
+ async_audio_processing_(
+ async_audio_processing_factory
+ ? async_audio_processing_factory->CreateAsyncAudioProcessing(
+ [this](std::unique_ptr<AudioFrame> frame) {
+ this->SendProcessedData(std::move(frame));
+ })
+ : nullptr),
+ mixer_(mixer) {
+ RTC_DCHECK(mixer);
+}
+
+AudioTransportImpl::~AudioTransportImpl() {}
+
+int32_t AudioTransportImpl::RecordedDataIsAvailable(
+ const void* audio_data,
+ size_t number_of_frames,
+ size_t bytes_per_sample,
+ size_t number_of_channels,
+ uint32_t sample_rate,
+ uint32_t audio_delay_milliseconds,
+ int32_t clock_drift,
+ uint32_t volume,
+ bool key_pressed,
+ uint32_t& new_mic_volume) { // NOLINT: to avoid changing APIs
+ return RecordedDataIsAvailable(
+ audio_data, number_of_frames, bytes_per_sample, number_of_channels,
+ sample_rate, audio_delay_milliseconds, clock_drift, volume, key_pressed,
+ new_mic_volume, /*estimated_capture_time_ns=*/absl::nullopt);
+}
+
+// Not used in Chromium. Process captured audio and distribute to all sending
+// streams, and try to do this at the lowest possible sample rate.
+int32_t AudioTransportImpl::RecordedDataIsAvailable(
+ const void* audio_data,
+ size_t number_of_frames,
+ size_t bytes_per_sample,
+ size_t number_of_channels,
+ uint32_t sample_rate,
+ uint32_t audio_delay_milliseconds,
+ int32_t /*clock_drift*/,
+ uint32_t /*volume*/,
+ bool key_pressed,
+ uint32_t& /*new_mic_volume*/,
+ absl::optional<int64_t>
+ estimated_capture_time_ns) { // NOLINT: to avoid changing APIs
+ RTC_DCHECK(audio_data);
+ RTC_DCHECK_GE(number_of_channels, 1);
+ RTC_DCHECK_LE(number_of_channels, 2);
+ RTC_DCHECK_EQ(2 * number_of_channels, bytes_per_sample);
+ RTC_DCHECK_GE(sample_rate, AudioProcessing::NativeRate::kSampleRate8kHz);
+ // 100 = 1 second / data duration (10 ms).
+ RTC_DCHECK_EQ(number_of_frames * 100, sample_rate);
+ RTC_DCHECK_LE(bytes_per_sample * number_of_frames * number_of_channels,
+ AudioFrame::kMaxDataSizeBytes);
+
+ int send_sample_rate_hz = 0;
+ size_t send_num_channels = 0;
+ bool swap_stereo_channels = false;
+ {
+ MutexLock lock(&capture_lock_);
+ send_sample_rate_hz = send_sample_rate_hz_;
+ send_num_channels = send_num_channels_;
+ swap_stereo_channels = swap_stereo_channels_;
+ }
+
+ std::unique_ptr<AudioFrame> audio_frame(new AudioFrame());
+ InitializeCaptureFrame(sample_rate, send_sample_rate_hz, number_of_channels,
+ send_num_channels, audio_frame.get());
+ voe::RemixAndResample(static_cast<const int16_t*>(audio_data),
+ number_of_frames, number_of_channels, sample_rate,
+ &capture_resampler_, audio_frame.get());
+ ProcessCaptureFrame(audio_delay_milliseconds, key_pressed,
+ swap_stereo_channels, audio_processing_,
+ audio_frame.get());
+
+ if (estimated_capture_time_ns) {
+ audio_frame->set_absolute_capture_timestamp_ms(*estimated_capture_time_ns /
+ 1000000);
+ }
+
+ RTC_DCHECK_GT(audio_frame->samples_per_channel_, 0);
+ if (async_audio_processing_)
+ async_audio_processing_->Process(std::move(audio_frame));
+ else
+ SendProcessedData(std::move(audio_frame));
+
+ return 0;
+}
+
+void AudioTransportImpl::SendProcessedData(
+ std::unique_ptr<AudioFrame> audio_frame) {
+ TRACE_EVENT0("webrtc", "AudioTransportImpl::SendProcessedData");
+ RTC_DCHECK_GT(audio_frame->samples_per_channel_, 0);
+ MutexLock lock(&capture_lock_);
+ if (audio_senders_.empty())
+ return;
+
+ auto it = audio_senders_.begin();
+ while (++it != audio_senders_.end()) {
+ auto audio_frame_copy = std::make_unique<AudioFrame>();
+ audio_frame_copy->CopyFrom(*audio_frame);
+ (*it)->SendAudioData(std::move(audio_frame_copy));
+ }
+ // Send the original frame to the first stream w/o copying.
+ (*audio_senders_.begin())->SendAudioData(std::move(audio_frame));
+}
+
+// Mix all received streams, feed the result to the AudioProcessing module, then
+// resample the result to the requested output rate.
+int32_t AudioTransportImpl::NeedMorePlayData(const size_t nSamples,
+ const size_t nBytesPerSample,
+ const size_t nChannels,
+ const uint32_t samplesPerSec,
+ void* audioSamples,
+ size_t& nSamplesOut,
+ int64_t* elapsed_time_ms,
+ int64_t* ntp_time_ms) {
+ TRACE_EVENT0("webrtc", "AudioTransportImpl::SendProcessedData");
+ RTC_DCHECK_EQ(sizeof(int16_t) * nChannels, nBytesPerSample);
+ RTC_DCHECK_GE(nChannels, 1);
+ RTC_DCHECK_LE(nChannels, 2);
+ RTC_DCHECK_GE(
+ samplesPerSec,
+ static_cast<uint32_t>(AudioProcessing::NativeRate::kSampleRate8kHz));
+
+ // 100 = 1 second / data duration (10 ms).
+ RTC_DCHECK_EQ(nSamples * 100, samplesPerSec);
+ RTC_DCHECK_LE(nBytesPerSample * nSamples * nChannels,
+ AudioFrame::kMaxDataSizeBytes);
+
+ mixer_->Mix(nChannels, &mixed_frame_);
+ *elapsed_time_ms = mixed_frame_.elapsed_time_ms_;
+ *ntp_time_ms = mixed_frame_.ntp_time_ms_;
+
+ if (audio_processing_) {
+ const auto error =
+ ProcessReverseAudioFrame(audio_processing_, &mixed_frame_);
+ RTC_DCHECK_EQ(error, AudioProcessing::kNoError);
+ }
+
+ nSamplesOut = Resample(mixed_frame_, samplesPerSec, &render_resampler_,
+ static_cast<int16_t*>(audioSamples));
+ RTC_DCHECK_EQ(nSamplesOut, nChannels * nSamples);
+ return 0;
+}
+
+// Used by Chromium - same as NeedMorePlayData() but because Chrome has its
+// own APM instance, does not call audio_processing_->ProcessReverseStream().
+void AudioTransportImpl::PullRenderData(int bits_per_sample,
+ int sample_rate,
+ size_t number_of_channels,
+ size_t number_of_frames,
+ void* audio_data,
+ int64_t* elapsed_time_ms,
+ int64_t* ntp_time_ms) {
+ TRACE_EVENT2("webrtc", "AudioTransportImpl::PullRenderData", "sample_rate",
+ sample_rate, "number_of_frames", number_of_frames);
+ RTC_DCHECK_EQ(bits_per_sample, 16);
+ RTC_DCHECK_GE(number_of_channels, 1);
+ RTC_DCHECK_GE(sample_rate, AudioProcessing::NativeRate::kSampleRate8kHz);
+
+ // 100 = 1 second / data duration (10 ms).
+ RTC_DCHECK_EQ(number_of_frames * 100, sample_rate);
+
+ // 8 = bits per byte.
+ RTC_DCHECK_LE(bits_per_sample / 8 * number_of_frames * number_of_channels,
+ AudioFrame::kMaxDataSizeBytes);
+ mixer_->Mix(number_of_channels, &mixed_frame_);
+ *elapsed_time_ms = mixed_frame_.elapsed_time_ms_;
+ *ntp_time_ms = mixed_frame_.ntp_time_ms_;
+
+ auto output_samples = Resample(mixed_frame_, sample_rate, &render_resampler_,
+ static_cast<int16_t*>(audio_data));
+ RTC_DCHECK_EQ(output_samples, number_of_channels * number_of_frames);
+}
+
+void AudioTransportImpl::UpdateAudioSenders(std::vector<AudioSender*> senders,
+ int send_sample_rate_hz,
+ size_t send_num_channels) {
+ MutexLock lock(&capture_lock_);
+ audio_senders_ = std::move(senders);
+ send_sample_rate_hz_ = send_sample_rate_hz;
+ send_num_channels_ = send_num_channels;
+}
+
+void AudioTransportImpl::SetStereoChannelSwapping(bool enable) {
+ MutexLock lock(&capture_lock_);
+ swap_stereo_channels_ = enable;
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/audio_transport_impl.h b/third_party/libwebrtc/audio/audio_transport_impl.h
new file mode 100644
index 0000000000..24b09d2140
--- /dev/null
+++ b/third_party/libwebrtc/audio/audio_transport_impl.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_AUDIO_TRANSPORT_IMPL_H_
+#define AUDIO_AUDIO_TRANSPORT_IMPL_H_
+
+#include <memory>
+#include <vector>
+
+#include "api/audio/audio_mixer.h"
+#include "api/scoped_refptr.h"
+#include "common_audio/resampler/include/push_resampler.h"
+#include "modules/async_audio_processing/async_audio_processing.h"
+#include "modules/audio_device/include/audio_device.h"
+#include "modules/audio_processing/include/audio_processing.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace webrtc {
+
+class AudioSender;
+
+class AudioTransportImpl : public AudioTransport {
+ public:
+ AudioTransportImpl(
+ AudioMixer* mixer,
+ AudioProcessing* audio_processing,
+ AsyncAudioProcessing::Factory* async_audio_processing_factory);
+
+ AudioTransportImpl() = delete;
+ AudioTransportImpl(const AudioTransportImpl&) = delete;
+ AudioTransportImpl& operator=(const AudioTransportImpl&) = delete;
+
+ ~AudioTransportImpl() override;
+
+ // TODO(bugs.webrtc.org/13620) Deprecate this function
+ int32_t RecordedDataIsAvailable(const void* audioSamples,
+ size_t nSamples,
+ size_t nBytesPerSample,
+ size_t nChannels,
+ uint32_t samplesPerSec,
+ uint32_t totalDelayMS,
+ int32_t clockDrift,
+ uint32_t currentMicLevel,
+ bool keyPressed,
+ uint32_t& newMicLevel) override;
+
+ int32_t RecordedDataIsAvailable(
+ const void* audioSamples,
+ size_t nSamples,
+ size_t nBytesPerSample,
+ size_t nChannels,
+ uint32_t samplesPerSec,
+ uint32_t totalDelayMS,
+ int32_t clockDrift,
+ uint32_t currentMicLevel,
+ bool keyPressed,
+ uint32_t& newMicLevel,
+ absl::optional<int64_t> estimated_capture_time_ns) override;
+
+ int32_t NeedMorePlayData(size_t nSamples,
+ size_t nBytesPerSample,
+ size_t nChannels,
+ uint32_t samplesPerSec,
+ void* audioSamples,
+ size_t& nSamplesOut,
+ int64_t* elapsed_time_ms,
+ int64_t* ntp_time_ms) override;
+
+ void PullRenderData(int bits_per_sample,
+ int sample_rate,
+ size_t number_of_channels,
+ size_t number_of_frames,
+ void* audio_data,
+ int64_t* elapsed_time_ms,
+ int64_t* ntp_time_ms) override;
+
+ void UpdateAudioSenders(std::vector<AudioSender*> senders,
+ int send_sample_rate_hz,
+ size_t send_num_channels);
+ void SetStereoChannelSwapping(bool enable);
+
+ private:
+ void SendProcessedData(std::unique_ptr<AudioFrame> audio_frame);
+
+ // Shared.
+ AudioProcessing* audio_processing_ = nullptr;
+
+ // Capture side.
+
+ // Thread-safe.
+ const std::unique_ptr<AsyncAudioProcessing> async_audio_processing_;
+
+ mutable Mutex capture_lock_;
+ std::vector<AudioSender*> audio_senders_ RTC_GUARDED_BY(capture_lock_);
+ int send_sample_rate_hz_ RTC_GUARDED_BY(capture_lock_) = 8000;
+ size_t send_num_channels_ RTC_GUARDED_BY(capture_lock_) = 1;
+ bool swap_stereo_channels_ RTC_GUARDED_BY(capture_lock_) = false;
+ PushResampler<int16_t> capture_resampler_;
+
+ // Render side.
+
+ rtc::scoped_refptr<AudioMixer> mixer_;
+ AudioFrame mixed_frame_;
+ // Converts mixed audio to the audio device output rate.
+ PushResampler<int16_t> render_resampler_;
+};
+} // namespace webrtc
+
+#endif // AUDIO_AUDIO_TRANSPORT_IMPL_H_
diff --git a/third_party/libwebrtc/audio/channel_receive.cc b/third_party/libwebrtc/audio/channel_receive.cc
new file mode 100644
index 0000000000..50bc94fe1f
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive.cc
@@ -0,0 +1,1137 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_receive.h"
+
+#include <algorithm>
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/crypto/frame_decryptor_interface.h"
+#include "api/frame_transformer_interface.h"
+#include "api/rtc_event_log/rtc_event_log.h"
+#include "api/sequence_checker.h"
+#include "api/task_queue/pending_task_safety_flag.h"
+#include "api/task_queue/task_queue_base.h"
+#include "api/units/time_delta.h"
+#include "audio/audio_level.h"
+#include "audio/channel_receive_frame_transformer_delegate.h"
+#include "audio/channel_send.h"
+#include "audio/utility/audio_frame_operations.h"
+#include "logging/rtc_event_log/events/rtc_event_audio_playout.h"
+#include "logging/rtc_event_log/events/rtc_event_neteq_set_minimum_delay.h"
+#include "modules/audio_coding/acm2/acm_receiver.h"
+#include "modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor_config.h"
+#include "modules/audio_device/include/audio_device.h"
+#include "modules/pacing/packet_router.h"
+#include "modules/rtp_rtcp/include/receive_statistics.h"
+#include "modules/rtp_rtcp/include/remote_ntp_time_estimator.h"
+#include "modules/rtp_rtcp/source/absolute_capture_time_interpolator.h"
+#include "modules/rtp_rtcp/source/capture_clock_offset_updater.h"
+#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
+#include "modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_config.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_impl2.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/numerics/safe_minmax.h"
+#include "rtc_base/numerics/sequence_number_unwrapper.h"
+#include "rtc_base/race_checker.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "rtc_base/time_utils.h"
+#include "rtc_base/trace_event.h"
+#include "system_wrappers/include/metrics.h"
+#include "system_wrappers/include/ntp_time.h"
+
+namespace webrtc {
+namespace voe {
+
+namespace {
+
+constexpr double kAudioSampleDurationSeconds = 0.01;
+
+// Video Sync.
+constexpr int kVoiceEngineMinMinPlayoutDelayMs = 0;
+constexpr int kVoiceEngineMaxMinPlayoutDelayMs = 10000;
+
+AudioCodingModule::Config AcmConfig(
+ NetEqFactory* neteq_factory,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ size_t jitter_buffer_max_packets,
+ bool jitter_buffer_fast_playout) {
+ AudioCodingModule::Config acm_config;
+ acm_config.neteq_factory = neteq_factory;
+ acm_config.decoder_factory = decoder_factory;
+ acm_config.neteq_config.codec_pair_id = codec_pair_id;
+ acm_config.neteq_config.max_packets_in_buffer = jitter_buffer_max_packets;
+ acm_config.neteq_config.enable_fast_accelerate = jitter_buffer_fast_playout;
+ acm_config.neteq_config.enable_muted_state = true;
+
+ return acm_config;
+}
+
+class ChannelReceive : public ChannelReceiveInterface,
+ public RtcpPacketTypeCounterObserver {
+ public:
+ // Used for receive streams.
+ ChannelReceive(
+ Clock* clock,
+ NetEqFactory* neteq_factory,
+ AudioDeviceModule* audio_device_module,
+ Transport* rtcp_send_transport,
+ RtcEventLog* rtc_event_log,
+ uint32_t local_ssrc,
+ uint32_t remote_ssrc,
+ size_t jitter_buffer_max_packets,
+ bool jitter_buffer_fast_playout,
+ int jitter_buffer_min_delay_ms,
+ bool enable_non_sender_rtt,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ RtcpEventObserver* rtcp_event_observer);
+ ~ChannelReceive() override;
+
+ void SetSink(AudioSinkInterface* sink) override;
+
+ void SetReceiveCodecs(const std::map<int, SdpAudioFormat>& codecs) override;
+
+ // API methods
+
+ void StartPlayout() override;
+ void StopPlayout() override;
+
+ // Codecs
+ absl::optional<std::pair<int, SdpAudioFormat>> GetReceiveCodec()
+ const override;
+
+ void ReceivedRTCPPacket(const uint8_t* data, size_t length) override;
+
+ // RtpPacketSinkInterface.
+ void OnRtpPacket(const RtpPacketReceived& packet) override;
+
+ // Muting, Volume and Level.
+ void SetChannelOutputVolumeScaling(float scaling) override;
+ int GetSpeechOutputLevelFullRange() const override;
+ // See description of "totalAudioEnergy" in the WebRTC stats spec:
+ // https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamtrackstats-totalaudioenergy
+ double GetTotalOutputEnergy() const override;
+ double GetTotalOutputDuration() const override;
+
+ // Stats.
+ NetworkStatistics GetNetworkStatistics(
+ bool get_and_clear_legacy_stats) const override;
+ AudioDecodingCallStats GetDecodingCallStatistics() const override;
+
+ // Audio+Video Sync.
+ uint32_t GetDelayEstimate() const override;
+ bool SetMinimumPlayoutDelay(int delayMs) override;
+ bool GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
+ int64_t* time_ms) const override;
+ void SetEstimatedPlayoutNtpTimestampMs(int64_t ntp_timestamp_ms,
+ int64_t time_ms) override;
+ absl::optional<int64_t> GetCurrentEstimatedPlayoutNtpTimestampMs(
+ int64_t now_ms) const override;
+
+ // Audio quality.
+ bool SetBaseMinimumPlayoutDelayMs(int delay_ms) override;
+ int GetBaseMinimumPlayoutDelayMs() const override;
+
+ // Produces the transport-related timestamps; current_delay_ms is left unset.
+ absl::optional<Syncable::Info> GetSyncInfo() const override;
+
+ void RegisterReceiverCongestionControlObjects(
+ PacketRouter* packet_router) override;
+ void ResetReceiverCongestionControlObjects() override;
+
+ CallReceiveStatistics GetRTCPStatistics() const override;
+ void SetNACKStatus(bool enable, int maxNumberOfPackets) override;
+ void SetNonSenderRttMeasurement(bool enabled) override;
+
+ AudioMixer::Source::AudioFrameInfo GetAudioFrameWithInfo(
+ int sample_rate_hz,
+ AudioFrame* audio_frame) override;
+
+ int PreferredSampleRate() const override;
+
+ void SetSourceTracker(SourceTracker* source_tracker) override;
+
+ // Associate to a send channel.
+ // Used for obtaining RTT for a receive-only channel.
+ void SetAssociatedSendChannel(const ChannelSendInterface* channel) override;
+
+ // Sets a frame transformer between the depacketizer and the decoder, to
+ // transform the received frames before decoding them.
+ void SetDepacketizerToDecoderFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer)
+ override;
+
+ void SetFrameDecryptor(rtc::scoped_refptr<webrtc::FrameDecryptorInterface>
+ frame_decryptor) override;
+
+ void OnLocalSsrcChange(uint32_t local_ssrc) override;
+ uint32_t GetLocalSsrc() const override;
+
+ void RtcpPacketTypesCounterUpdated(
+ uint32_t ssrc,
+ const RtcpPacketTypeCounter& packet_counter) override;
+
+ private:
+ void ReceivePacket(const uint8_t* packet,
+ size_t packet_length,
+ const RTPHeader& header)
+ RTC_RUN_ON(worker_thread_checker_);
+ int ResendPackets(const uint16_t* sequence_numbers, int length);
+ void UpdatePlayoutTimestamp(bool rtcp, int64_t now_ms)
+ RTC_RUN_ON(worker_thread_checker_);
+
+ int GetRtpTimestampRateHz() const;
+
+ void OnReceivedPayloadData(rtc::ArrayView<const uint8_t> payload,
+ const RTPHeader& rtpHeader)
+ RTC_RUN_ON(worker_thread_checker_);
+
+ void InitFrameTransformerDelegate(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer)
+ RTC_RUN_ON(worker_thread_checker_);
+
+ // Thread checkers document and lock usage of some methods to specific threads
+ // we know about. The goal is to eventually split up voe::ChannelReceive into
+ // parts with single-threaded semantics, and thereby reduce the need for
+ // locks.
+ RTC_NO_UNIQUE_ADDRESS SequenceChecker worker_thread_checker_;
+ RTC_NO_UNIQUE_ADDRESS SequenceChecker network_thread_checker_;
+
+ TaskQueueBase* const worker_thread_;
+ ScopedTaskSafety worker_safety_;
+
+ // Methods accessed from audio and video threads are checked for sequential-
+ // only access. We don't necessarily own and control these threads, so thread
+ // checkers cannot be used. E.g. Chromium may transfer "ownership" from one
+ // audio thread to another, but access is still sequential.
+ rtc::RaceChecker audio_thread_race_checker_;
+ Mutex callback_mutex_;
+ Mutex volume_settings_mutex_;
+
+ bool playing_ RTC_GUARDED_BY(worker_thread_checker_) = false;
+
+ RtcEventLog* const event_log_;
+
+ // Indexed by payload type.
+ std::map<uint8_t, int> payload_type_frequencies_;
+
+ std::unique_ptr<ReceiveStatistics> rtp_receive_statistics_;
+ std::unique_ptr<ModuleRtpRtcpImpl2> rtp_rtcp_;
+ const uint32_t remote_ssrc_;
+ SourceTracker* source_tracker_ = nullptr;
+
+ // Info for GetSyncInfo is updated on network or worker thread, and queried on
+ // the worker thread.
+ absl::optional<uint32_t> last_received_rtp_timestamp_
+ RTC_GUARDED_BY(&worker_thread_checker_);
+ absl::optional<int64_t> last_received_rtp_system_time_ms_
+ RTC_GUARDED_BY(&worker_thread_checker_);
+
+ // The AcmReceiver is thread safe, using its own lock.
+ acm2::AcmReceiver acm_receiver_;
+ AudioSinkInterface* audio_sink_ = nullptr;
+ AudioLevel _outputAudioLevel;
+
+ Clock* const clock_;
+ RemoteNtpTimeEstimator ntp_estimator_ RTC_GUARDED_BY(ts_stats_lock_);
+
+ // Timestamp of the audio pulled from NetEq.
+ absl::optional<uint32_t> jitter_buffer_playout_timestamp_;
+
+ uint32_t playout_timestamp_rtp_ RTC_GUARDED_BY(worker_thread_checker_);
+ absl::optional<int64_t> playout_timestamp_rtp_time_ms_
+ RTC_GUARDED_BY(worker_thread_checker_);
+ uint32_t playout_delay_ms_ RTC_GUARDED_BY(worker_thread_checker_);
+ absl::optional<int64_t> playout_timestamp_ntp_
+ RTC_GUARDED_BY(worker_thread_checker_);
+ absl::optional<int64_t> playout_timestamp_ntp_time_ms_
+ RTC_GUARDED_BY(worker_thread_checker_);
+
+ mutable Mutex ts_stats_lock_;
+
+ webrtc::RtpTimestampUnwrapper rtp_ts_wraparound_handler_;
+ // The rtp timestamp of the first played out audio frame.
+ int64_t capture_start_rtp_time_stamp_;
+ // The capture ntp time (in local timebase) of the first played out audio
+ // frame.
+ int64_t capture_start_ntp_time_ms_ RTC_GUARDED_BY(ts_stats_lock_);
+
+ AudioDeviceModule* _audioDeviceModulePtr;
+ float _outputGain RTC_GUARDED_BY(volume_settings_mutex_);
+
+ const ChannelSendInterface* associated_send_channel_
+ RTC_GUARDED_BY(network_thread_checker_);
+
+ PacketRouter* packet_router_ = nullptr;
+
+ SequenceChecker construction_thread_;
+
+ // E2EE Audio Frame Decryption
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor_
+ RTC_GUARDED_BY(worker_thread_checker_);
+ webrtc::CryptoOptions crypto_options_;
+
+ webrtc::AbsoluteCaptureTimeInterpolator absolute_capture_time_interpolator_
+ RTC_GUARDED_BY(worker_thread_checker_);
+
+ webrtc::CaptureClockOffsetUpdater capture_clock_offset_updater_;
+
+ rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate>
+ frame_transformer_delegate_;
+
+ // Counter that's used to control the frequency of reporting histograms
+ // from the `GetAudioFrameWithInfo` callback.
+ int audio_frame_interval_count_ RTC_GUARDED_BY(audio_thread_race_checker_) =
+ 0;
+ // Controls how many callbacks we let pass by before reporting callback stats.
+ // A value of 100 means 100 callbacks, each one of which represents 10ms worth
+ // of data, so the stats reporting frequency will be 1Hz (modulo failures).
+ constexpr static int kHistogramReportingInterval = 100;
+
+ mutable Mutex rtcp_counter_mutex_;
+ RtcpPacketTypeCounter rtcp_packet_type_counter_
+ RTC_GUARDED_BY(rtcp_counter_mutex_);
+};
+
+void ChannelReceive::OnReceivedPayloadData(
+ rtc::ArrayView<const uint8_t> payload,
+ const RTPHeader& rtpHeader) {
+ if (!playing_) {
+ // Avoid inserting into NetEQ when we are not playing. Count the
+ // packet as discarded.
+
+ // If we have a source_tracker_, tell it that the frame has been
+ // "delivered". Normally, this happens in AudioReceiveStreamInterface when
+ // audio frames are pulled out, but when playout is muted, nothing is
+ // pulling frames. The downside of this approach is that frames delivered
+ // this way won't be delayed for playout, and therefore will be
+ // unsynchronized with (a) audio delay when playing and (b) any audio/video
+ // synchronization. But the alternative is that muting playout also stops
+ // the SourceTracker from updating RtpSource information.
+ if (source_tracker_) {
+ RtpPacketInfos::vector_type packet_vector = {
+ RtpPacketInfo(rtpHeader, clock_->CurrentTime())};
+ source_tracker_->OnFrameDelivered(RtpPacketInfos(packet_vector));
+ }
+
+ return;
+ }
+
+ // Push the incoming payload (parsed and ready for decoding) into the ACM
+ if (acm_receiver_.InsertPacket(rtpHeader, payload) != 0) {
+ RTC_DLOG(LS_ERROR) << "ChannelReceive::OnReceivedPayloadData() unable to "
+ "push data to the ACM";
+ return;
+ }
+
+ int64_t round_trip_time = 0;
+ rtp_rtcp_->RTT(remote_ssrc_, &round_trip_time, /*avg_rtt=*/nullptr,
+ /*min_rtt=*/nullptr, /*max_rtt=*/nullptr);
+
+ std::vector<uint16_t> nack_list = acm_receiver_.GetNackList(round_trip_time);
+ if (!nack_list.empty()) {
+ // Can't use nack_list.data() since it's not supported by all
+ // compilers.
+ ResendPackets(&(nack_list[0]), static_cast<int>(nack_list.size()));
+ }
+}
+
+void ChannelReceive::InitFrameTransformerDelegate(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
+ RTC_DCHECK(frame_transformer);
+ RTC_DCHECK(!frame_transformer_delegate_);
+ RTC_DCHECK(worker_thread_->IsCurrent());
+
+ // Pass a callback to ChannelReceive::OnReceivedPayloadData, to be called by
+ // the delegate to receive transformed audio.
+ ChannelReceiveFrameTransformerDelegate::ReceiveFrameCallback
+ receive_audio_callback = [this](rtc::ArrayView<const uint8_t> packet,
+ const RTPHeader& header) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ OnReceivedPayloadData(packet, header);
+ };
+ frame_transformer_delegate_ =
+ rtc::make_ref_counted<ChannelReceiveFrameTransformerDelegate>(
+ std::move(receive_audio_callback), std::move(frame_transformer),
+ worker_thread_);
+ frame_transformer_delegate_->Init();
+}
+
+AudioMixer::Source::AudioFrameInfo ChannelReceive::GetAudioFrameWithInfo(
+ int sample_rate_hz,
+ AudioFrame* audio_frame) {
+ TRACE_EVENT_BEGIN1("webrtc", "ChannelReceive::GetAudioFrameWithInfo",
+ "sample_rate_hz", sample_rate_hz);
+ RTC_DCHECK_RUNS_SERIALIZED(&audio_thread_race_checker_);
+ audio_frame->sample_rate_hz_ = sample_rate_hz;
+
+ event_log_->Log(std::make_unique<RtcEventAudioPlayout>(remote_ssrc_));
+
+ // Get 10ms raw PCM data from the ACM (mixer limits output frequency)
+ bool muted;
+ if (acm_receiver_.GetAudio(audio_frame->sample_rate_hz_, audio_frame,
+ &muted) == -1) {
+ RTC_DLOG(LS_ERROR)
+ << "ChannelReceive::GetAudioFrame() PlayoutData10Ms() failed!";
+ // In all likelihood, the audio in this frame is garbage. We return an
+ // error so that the audio mixer module doesn't add it to the mix. As
+ // a result, it won't be played out and the actions skipped here are
+ // irrelevant.
+
+ TRACE_EVENT_END1("webrtc", "ChannelReceive::GetAudioFrameWithInfo", "error",
+ 1);
+ return AudioMixer::Source::AudioFrameInfo::kError;
+ }
+
+ if (muted) {
+ // TODO(henrik.lundin): We should be able to do better than this. But we
+ // will have to go through all the cases below where the audio samples may
+ // be used, and handle the muted case in some way.
+ AudioFrameOperations::Mute(audio_frame);
+ }
+
+ {
+ // Pass the audio buffers to an optional sink callback, before applying
+ // scaling/panning, as that applies to the mix operation.
+ // External recipients of the audio (e.g. via AudioTrack), will do their
+ // own mixing/dynamic processing.
+ MutexLock lock(&callback_mutex_);
+ if (audio_sink_) {
+ AudioSinkInterface::Data data(
+ audio_frame->data(), audio_frame->samples_per_channel_,
+ audio_frame->sample_rate_hz_, audio_frame->num_channels_,
+ audio_frame->timestamp_);
+ audio_sink_->OnData(data);
+ }
+ }
+
+ float output_gain = 1.0f;
+ {
+ MutexLock lock(&volume_settings_mutex_);
+ output_gain = _outputGain;
+ }
+
+ // Output volume scaling
+ if (output_gain < 0.99f || output_gain > 1.01f) {
+ // TODO(solenberg): Combine with mute state - this can cause clicks!
+ AudioFrameOperations::ScaleWithSat(output_gain, audio_frame);
+ }
+
+ // Measure audio level (0-9)
+ // TODO(henrik.lundin) Use the `muted` information here too.
+ // TODO(deadbeef): Use RmsLevel for `_outputAudioLevel` (see
+ // https://crbug.com/webrtc/7517).
+ _outputAudioLevel.ComputeLevel(*audio_frame, kAudioSampleDurationSeconds);
+
+ if (capture_start_rtp_time_stamp_ < 0 && audio_frame->timestamp_ != 0) {
+ // The first frame with a valid rtp timestamp.
+ capture_start_rtp_time_stamp_ = audio_frame->timestamp_;
+ }
+
+ if (capture_start_rtp_time_stamp_ >= 0) {
+ // audio_frame.timestamp_ should be valid from now on.
+ // Compute elapsed time.
+ int64_t unwrap_timestamp =
+ rtp_ts_wraparound_handler_.Unwrap(audio_frame->timestamp_);
+ audio_frame->elapsed_time_ms_ =
+ (unwrap_timestamp - capture_start_rtp_time_stamp_) /
+ (GetRtpTimestampRateHz() / 1000);
+
+ {
+ MutexLock lock(&ts_stats_lock_);
+ // Compute ntp time.
+ audio_frame->ntp_time_ms_ =
+ ntp_estimator_.Estimate(audio_frame->timestamp_);
+ // `ntp_time_ms_` won't be valid until at least 2 RTCP SRs are received.
+ if (audio_frame->ntp_time_ms_ > 0) {
+ // Compute `capture_start_ntp_time_ms_` so that
+ // `capture_start_ntp_time_ms_` + `elapsed_time_ms_` == `ntp_time_ms_`
+ capture_start_ntp_time_ms_ =
+ audio_frame->ntp_time_ms_ - audio_frame->elapsed_time_ms_;
+ }
+ }
+ }
+
+ // Fill in local capture clock offset in `audio_frame->packet_infos_`.
+ RtpPacketInfos::vector_type packet_infos;
+ for (auto& packet_info : audio_frame->packet_infos_) {
+ absl::optional<int64_t> local_capture_clock_offset_q32x32;
+ if (packet_info.absolute_capture_time().has_value()) {
+ local_capture_clock_offset_q32x32 =
+ capture_clock_offset_updater_.AdjustEstimatedCaptureClockOffset(
+ packet_info.absolute_capture_time()
+ ->estimated_capture_clock_offset);
+ }
+ RtpPacketInfo new_packet_info(packet_info);
+ absl::optional<TimeDelta> local_capture_clock_offset;
+ if (local_capture_clock_offset_q32x32.has_value()) {
+ local_capture_clock_offset = TimeDelta::Millis(
+ UQ32x32ToInt64Ms(*local_capture_clock_offset_q32x32));
+ }
+ new_packet_info.set_local_capture_clock_offset(local_capture_clock_offset);
+ packet_infos.push_back(std::move(new_packet_info));
+ }
+ audio_frame->packet_infos_ = RtpPacketInfos(packet_infos);
+
+ ++audio_frame_interval_count_;
+ if (audio_frame_interval_count_ >= kHistogramReportingInterval) {
+ audio_frame_interval_count_ = 0;
+ worker_thread_->PostTask(SafeTask(worker_safety_.flag(), [this]() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_HISTOGRAM_COUNTS_1000("WebRTC.Audio.TargetJitterBufferDelayMs",
+ acm_receiver_.TargetDelayMs());
+ const int jitter_buffer_delay = acm_receiver_.FilteredCurrentDelayMs();
+ RTC_HISTOGRAM_COUNTS_1000("WebRTC.Audio.ReceiverDelayEstimateMs",
+ jitter_buffer_delay + playout_delay_ms_);
+ RTC_HISTOGRAM_COUNTS_1000("WebRTC.Audio.ReceiverJitterBufferDelayMs",
+ jitter_buffer_delay);
+ RTC_HISTOGRAM_COUNTS_1000("WebRTC.Audio.ReceiverDeviceDelayMs",
+ playout_delay_ms_);
+ }));
+ }
+
+ TRACE_EVENT_END2("webrtc", "ChannelReceive::GetAudioFrameWithInfo", "gain",
+ output_gain, "muted", muted);
+ return muted ? AudioMixer::Source::AudioFrameInfo::kMuted
+ : AudioMixer::Source::AudioFrameInfo::kNormal;
+}
+
+int ChannelReceive::PreferredSampleRate() const {
+ RTC_DCHECK_RUNS_SERIALIZED(&audio_thread_race_checker_);
+ // Return the bigger of playout and receive frequency in the ACM.
+ return std::max(acm_receiver_.last_packet_sample_rate_hz().value_or(0),
+ acm_receiver_.last_output_sample_rate_hz());
+}
+
+void ChannelReceive::SetSourceTracker(SourceTracker* source_tracker) {
+ source_tracker_ = source_tracker;
+}
+
+ChannelReceive::ChannelReceive(
+ Clock* clock,
+ NetEqFactory* neteq_factory,
+ AudioDeviceModule* audio_device_module,
+ Transport* rtcp_send_transport,
+ RtcEventLog* rtc_event_log,
+ uint32_t local_ssrc,
+ uint32_t remote_ssrc,
+ size_t jitter_buffer_max_packets,
+ bool jitter_buffer_fast_playout,
+ int jitter_buffer_min_delay_ms,
+ bool enable_non_sender_rtt,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ RtcpEventObserver* rtcp_event_observer)
+ : worker_thread_(TaskQueueBase::Current()),
+ event_log_(rtc_event_log),
+ rtp_receive_statistics_(ReceiveStatistics::Create(clock)),
+ remote_ssrc_(remote_ssrc),
+ acm_receiver_(AcmConfig(neteq_factory,
+ decoder_factory,
+ codec_pair_id,
+ jitter_buffer_max_packets,
+ jitter_buffer_fast_playout)),
+ _outputAudioLevel(),
+ clock_(clock),
+ ntp_estimator_(clock),
+ playout_timestamp_rtp_(0),
+ playout_delay_ms_(0),
+ capture_start_rtp_time_stamp_(-1),
+ capture_start_ntp_time_ms_(-1),
+ _audioDeviceModulePtr(audio_device_module),
+ _outputGain(1.0f),
+ associated_send_channel_(nullptr),
+ frame_decryptor_(frame_decryptor),
+ crypto_options_(crypto_options),
+ absolute_capture_time_interpolator_(clock) {
+ RTC_DCHECK(audio_device_module);
+
+ network_thread_checker_.Detach();
+
+ acm_receiver_.ResetInitialDelay();
+ acm_receiver_.SetMinimumDelay(0);
+ acm_receiver_.SetMaximumDelay(0);
+ acm_receiver_.FlushBuffers();
+
+ _outputAudioLevel.ResetLevelFullRange();
+
+ rtp_receive_statistics_->EnableRetransmitDetection(remote_ssrc_, true);
+ RtpRtcpInterface::Configuration configuration;
+ configuration.clock = clock;
+ configuration.audio = true;
+ configuration.receiver_only = true;
+ configuration.outgoing_transport = rtcp_send_transport;
+ configuration.receive_statistics = rtp_receive_statistics_.get();
+ configuration.event_log = event_log_;
+ configuration.local_media_ssrc = local_ssrc;
+ configuration.rtcp_packet_type_counter_observer = this;
+ configuration.non_sender_rtt_measurement = enable_non_sender_rtt;
+ configuration.rtcp_event_observer = rtcp_event_observer;
+
+ if (frame_transformer)
+ InitFrameTransformerDelegate(std::move(frame_transformer));
+
+ rtp_rtcp_ = ModuleRtpRtcpImpl2::Create(configuration);
+ rtp_rtcp_->SetRemoteSSRC(remote_ssrc_);
+
+ // Ensure that RTCP is enabled for the created channel.
+ rtp_rtcp_->SetRTCPStatus(RtcpMode::kCompound);
+}
+
+ChannelReceive::~ChannelReceive() {
+ RTC_DCHECK_RUN_ON(&construction_thread_);
+
+ // Resets the delegate's callback to ChannelReceive::OnReceivedPayloadData.
+ if (frame_transformer_delegate_)
+ frame_transformer_delegate_->Reset();
+
+ StopPlayout();
+}
+
+void ChannelReceive::SetSink(AudioSinkInterface* sink) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ MutexLock lock(&callback_mutex_);
+ audio_sink_ = sink;
+}
+
+void ChannelReceive::StartPlayout() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ playing_ = true;
+}
+
+void ChannelReceive::StopPlayout() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ playing_ = false;
+ _outputAudioLevel.ResetLevelFullRange();
+ acm_receiver_.FlushBuffers();
+}
+
+absl::optional<std::pair<int, SdpAudioFormat>> ChannelReceive::GetReceiveCodec()
+ const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return acm_receiver_.LastDecoder();
+}
+
+void ChannelReceive::SetReceiveCodecs(
+ const std::map<int, SdpAudioFormat>& codecs) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ for (const auto& kv : codecs) {
+ RTC_DCHECK_GE(kv.second.clockrate_hz, 1000);
+ payload_type_frequencies_[kv.first] = kv.second.clockrate_hz;
+ }
+ acm_receiver_.SetCodecs(codecs);
+}
+
+void ChannelReceive::OnRtpPacket(const RtpPacketReceived& packet) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // TODO(bugs.webrtc.org/11993): Expect to be called exclusively on the
+ // network thread. Once that's done, the same applies to
+ // UpdatePlayoutTimestamp and
+ int64_t now_ms = rtc::TimeMillis();
+
+ last_received_rtp_timestamp_ = packet.Timestamp();
+ last_received_rtp_system_time_ms_ = now_ms;
+
+ // Store playout timestamp for the received RTP packet
+ UpdatePlayoutTimestamp(false, now_ms);
+
+ const auto& it = payload_type_frequencies_.find(packet.PayloadType());
+ if (it == payload_type_frequencies_.end())
+ return;
+ // TODO(bugs.webrtc.org/7135): Set payload_type_frequency earlier, when packet
+ // is parsed.
+ RtpPacketReceived packet_copy(packet);
+ packet_copy.set_payload_type_frequency(it->second);
+
+ rtp_receive_statistics_->OnRtpPacket(packet_copy);
+
+ RTPHeader header;
+ packet_copy.GetHeader(&header);
+
+ // Interpolates absolute capture timestamp RTP header extension.
+ header.extension.absolute_capture_time =
+ absolute_capture_time_interpolator_.OnReceivePacket(
+ AbsoluteCaptureTimeInterpolator::GetSource(header.ssrc,
+ header.arrOfCSRCs),
+ header.timestamp,
+ rtc::saturated_cast<uint32_t>(packet_copy.payload_type_frequency()),
+ header.extension.absolute_capture_time);
+
+ ReceivePacket(packet_copy.data(), packet_copy.size(), header);
+}
+
+void ChannelReceive::ReceivePacket(const uint8_t* packet,
+ size_t packet_length,
+ const RTPHeader& header) {
+ const uint8_t* payload = packet + header.headerLength;
+ RTC_DCHECK_GE(packet_length, header.headerLength);
+ size_t payload_length = packet_length - header.headerLength;
+
+ size_t payload_data_length = payload_length - header.paddingLength;
+
+ // E2EE Custom Audio Frame Decryption (This is optional).
+ // Keep this buffer around for the lifetime of the OnReceivedPayloadData call.
+ rtc::Buffer decrypted_audio_payload;
+ if (frame_decryptor_ != nullptr) {
+ const size_t max_plaintext_size = frame_decryptor_->GetMaxPlaintextByteSize(
+ cricket::MEDIA_TYPE_AUDIO, payload_length);
+ decrypted_audio_payload.SetSize(max_plaintext_size);
+
+ const std::vector<uint32_t> csrcs(header.arrOfCSRCs,
+ header.arrOfCSRCs + header.numCSRCs);
+ const FrameDecryptorInterface::Result decrypt_result =
+ frame_decryptor_->Decrypt(
+ cricket::MEDIA_TYPE_AUDIO, csrcs,
+ /*additional_data=*/nullptr,
+ rtc::ArrayView<const uint8_t>(payload, payload_data_length),
+ decrypted_audio_payload);
+
+ if (decrypt_result.IsOk()) {
+ decrypted_audio_payload.SetSize(decrypt_result.bytes_written);
+ } else {
+ // Interpret failures as a silent frame.
+ decrypted_audio_payload.SetSize(0);
+ }
+
+ payload = decrypted_audio_payload.data();
+ payload_data_length = decrypted_audio_payload.size();
+ } else if (crypto_options_.sframe.require_frame_encryption) {
+ RTC_DLOG(LS_ERROR)
+ << "FrameDecryptor required but not set, dropping packet";
+ payload_data_length = 0;
+ }
+
+ rtc::ArrayView<const uint8_t> payload_data(payload, payload_data_length);
+ if (frame_transformer_delegate_) {
+ // Asynchronously transform the received payload. After the payload is
+ // transformed, the delegate will call OnReceivedPayloadData to handle it.
+ frame_transformer_delegate_->Transform(payload_data, header, remote_ssrc_);
+ } else {
+ OnReceivedPayloadData(payload_data, header);
+ }
+}
+
+void ChannelReceive::ReceivedRTCPPacket(const uint8_t* data, size_t length) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // TODO(bugs.webrtc.org/11993): Expect to be called exclusively on the
+ // network thread.
+
+ // Store playout timestamp for the received RTCP packet
+ UpdatePlayoutTimestamp(true, rtc::TimeMillis());
+
+ // Deliver RTCP packet to RTP/RTCP module for parsing
+ rtp_rtcp_->IncomingRtcpPacket(data, length);
+
+ int64_t rtt = 0;
+ rtp_rtcp_->RTT(remote_ssrc_, &rtt, /*avg_rtt=*/nullptr, /*min_rtt=*/nullptr,
+ /*max_rtt=*/nullptr);
+ if (rtt == 0) {
+ // Waiting for valid RTT.
+ return;
+ }
+
+ uint32_t ntp_secs = 0;
+ uint32_t ntp_frac = 0;
+ uint32_t rtp_timestamp = 0;
+ if (rtp_rtcp_->RemoteNTP(&ntp_secs, &ntp_frac,
+ /*rtcp_arrival_time_secs=*/nullptr,
+ /*rtcp_arrival_time_frac=*/nullptr,
+ &rtp_timestamp) != 0) {
+ // Waiting for RTCP.
+ return;
+ }
+
+ {
+ MutexLock lock(&ts_stats_lock_);
+ ntp_estimator_.UpdateRtcpTimestamp(
+ TimeDelta::Millis(rtt), NtpTime(ntp_secs, ntp_frac), rtp_timestamp);
+ absl::optional<int64_t> remote_to_local_clock_offset =
+ ntp_estimator_.EstimateRemoteToLocalClockOffset();
+ if (remote_to_local_clock_offset.has_value()) {
+ capture_clock_offset_updater_.SetRemoteToLocalClockOffset(
+ *remote_to_local_clock_offset);
+ }
+ }
+}
+
+int ChannelReceive::GetSpeechOutputLevelFullRange() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return _outputAudioLevel.LevelFullRange();
+}
+
+double ChannelReceive::GetTotalOutputEnergy() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return _outputAudioLevel.TotalEnergy();
+}
+
+double ChannelReceive::GetTotalOutputDuration() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return _outputAudioLevel.TotalDuration();
+}
+
+void ChannelReceive::SetChannelOutputVolumeScaling(float scaling) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ MutexLock lock(&volume_settings_mutex_);
+ _outputGain = scaling;
+}
+
+void ChannelReceive::RegisterReceiverCongestionControlObjects(
+ PacketRouter* packet_router) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK(packet_router);
+ RTC_DCHECK(!packet_router_);
+ constexpr bool remb_candidate = false;
+ packet_router->AddReceiveRtpModule(rtp_rtcp_.get(), remb_candidate);
+ packet_router_ = packet_router;
+}
+
+void ChannelReceive::ResetReceiverCongestionControlObjects() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK(packet_router_);
+ packet_router_->RemoveReceiveRtpModule(rtp_rtcp_.get());
+ packet_router_ = nullptr;
+}
+
+CallReceiveStatistics ChannelReceive::GetRTCPStatistics() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ CallReceiveStatistics stats;
+
+ // The jitter statistics is updated for each received RTP packet and is based
+ // on received packets.
+ RtpReceiveStats rtp_stats;
+ StreamStatistician* statistician =
+ rtp_receive_statistics_->GetStatistician(remote_ssrc_);
+ if (statistician) {
+ rtp_stats = statistician->GetStats();
+ }
+
+ stats.cumulativeLost = rtp_stats.packets_lost;
+ stats.jitterSamples = rtp_stats.jitter;
+
+ // Data counters.
+ if (statistician) {
+ stats.payload_bytes_rcvd = rtp_stats.packet_counter.payload_bytes;
+
+ stats.header_and_padding_bytes_rcvd =
+ rtp_stats.packet_counter.header_bytes +
+ rtp_stats.packet_counter.padding_bytes;
+ stats.packetsReceived = rtp_stats.packet_counter.packets;
+ stats.last_packet_received_timestamp_ms =
+ rtp_stats.last_packet_received_timestamp_ms;
+ } else {
+ stats.payload_bytes_rcvd = 0;
+ stats.header_and_padding_bytes_rcvd = 0;
+ stats.packetsReceived = 0;
+ stats.last_packet_received_timestamp_ms = absl::nullopt;
+ }
+
+ {
+ MutexLock lock(&rtcp_counter_mutex_);
+ stats.nacks_sent = rtcp_packet_type_counter_.nack_packets;
+ }
+
+ // Timestamps.
+ {
+ MutexLock lock(&ts_stats_lock_);
+ stats.capture_start_ntp_time_ms_ = capture_start_ntp_time_ms_;
+ }
+
+ absl::optional<RtpRtcpInterface::SenderReportStats> rtcp_sr_stats =
+ rtp_rtcp_->GetSenderReportStats();
+ if (rtcp_sr_stats.has_value()) {
+ stats.last_sender_report_timestamp_ms =
+ rtcp_sr_stats->last_arrival_timestamp.ToMs() -
+ rtc::kNtpJan1970Millisecs;
+ stats.last_sender_report_remote_timestamp_ms =
+ rtcp_sr_stats->last_remote_timestamp.ToMs() - rtc::kNtpJan1970Millisecs;
+ stats.sender_reports_packets_sent = rtcp_sr_stats->packets_sent;
+ stats.sender_reports_bytes_sent = rtcp_sr_stats->bytes_sent;
+ stats.sender_reports_reports_count = rtcp_sr_stats->reports_count;
+ }
+
+ absl::optional<RtpRtcpInterface::NonSenderRttStats> non_sender_rtt_stats =
+ rtp_rtcp_->GetNonSenderRttStats();
+ if (non_sender_rtt_stats.has_value()) {
+ stats.round_trip_time = non_sender_rtt_stats->round_trip_time;
+ stats.round_trip_time_measurements =
+ non_sender_rtt_stats->round_trip_time_measurements;
+ stats.total_round_trip_time = non_sender_rtt_stats->total_round_trip_time;
+ }
+
+ return stats;
+}
+
+void ChannelReceive::SetNACKStatus(bool enable, int max_packets) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // None of these functions can fail.
+ if (enable) {
+ rtp_receive_statistics_->SetMaxReorderingThreshold(max_packets);
+ acm_receiver_.EnableNack(max_packets);
+ } else {
+ rtp_receive_statistics_->SetMaxReorderingThreshold(
+ kDefaultMaxReorderingThreshold);
+ acm_receiver_.DisableNack();
+ }
+}
+
+void ChannelReceive::SetNonSenderRttMeasurement(bool enabled) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ rtp_rtcp_->SetNonSenderRttMeasurement(enabled);
+}
+
+// Called when we are missing one or more packets.
+int ChannelReceive::ResendPackets(const uint16_t* sequence_numbers,
+ int length) {
+ return rtp_rtcp_->SendNACK(sequence_numbers, length);
+}
+
+void ChannelReceive::RtcpPacketTypesCounterUpdated(
+ uint32_t ssrc,
+ const RtcpPacketTypeCounter& packet_counter) {
+ if (ssrc != remote_ssrc_) {
+ return;
+ }
+ MutexLock lock(&rtcp_counter_mutex_);
+ rtcp_packet_type_counter_ = packet_counter;
+}
+
+void ChannelReceive::SetAssociatedSendChannel(
+ const ChannelSendInterface* channel) {
+ RTC_DCHECK_RUN_ON(&network_thread_checker_);
+ associated_send_channel_ = channel;
+}
+
+void ChannelReceive::SetDepacketizerToDecoderFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // Depending on when the channel is created, the transformer might be set
+ // twice. Don't replace the delegate if it was already initialized.
+ if (!frame_transformer || frame_transformer_delegate_) {
+ RTC_DCHECK_NOTREACHED() << "Not setting the transformer?";
+ return;
+ }
+
+ InitFrameTransformerDelegate(std::move(frame_transformer));
+}
+
+void ChannelReceive::SetFrameDecryptor(
+ rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) {
+ // TODO(bugs.webrtc.org/11993): Expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ frame_decryptor_ = std::move(frame_decryptor);
+}
+
+void ChannelReceive::OnLocalSsrcChange(uint32_t local_ssrc) {
+ // TODO(bugs.webrtc.org/11993): Expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ rtp_rtcp_->SetLocalSsrc(local_ssrc);
+}
+
+uint32_t ChannelReceive::GetLocalSsrc() const {
+ // TODO(bugs.webrtc.org/11993): Expect to be called on the network thread.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return rtp_rtcp_->local_media_ssrc();
+}
+
+NetworkStatistics ChannelReceive::GetNetworkStatistics(
+ bool get_and_clear_legacy_stats) const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ NetworkStatistics stats;
+ acm_receiver_.GetNetworkStatistics(&stats, get_and_clear_legacy_stats);
+ return stats;
+}
+
+AudioDecodingCallStats ChannelReceive::GetDecodingCallStatistics() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ AudioDecodingCallStats stats;
+ acm_receiver_.GetDecodingCallStatistics(&stats);
+ return stats;
+}
+
+uint32_t ChannelReceive::GetDelayEstimate() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // Return the current jitter buffer delay + playout delay.
+ return acm_receiver_.FilteredCurrentDelayMs() + playout_delay_ms_;
+}
+
+bool ChannelReceive::SetMinimumPlayoutDelay(int delay_ms) {
+ // TODO(bugs.webrtc.org/11993): This should run on the network thread.
+ // We get here via RtpStreamsSynchronizer. Once that's done, many (all?) of
+ // these locks aren't needed.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // Limit to range accepted by both VoE and ACM, so we're at least getting as
+ // close as possible, instead of failing.
+ delay_ms = rtc::SafeClamp(delay_ms, kVoiceEngineMinMinPlayoutDelayMs,
+ kVoiceEngineMaxMinPlayoutDelayMs);
+ if (acm_receiver_.SetMinimumDelay(delay_ms) != 0) {
+ RTC_DLOG(LS_ERROR)
+ << "SetMinimumPlayoutDelay() failed to set min playout delay";
+ return false;
+ }
+ return true;
+}
+
+bool ChannelReceive::GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
+ int64_t* time_ms) const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!playout_timestamp_rtp_time_ms_)
+ return false;
+ *rtp_timestamp = playout_timestamp_rtp_;
+ *time_ms = playout_timestamp_rtp_time_ms_.value();
+ return true;
+}
+
+void ChannelReceive::SetEstimatedPlayoutNtpTimestampMs(int64_t ntp_timestamp_ms,
+ int64_t time_ms) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ playout_timestamp_ntp_ = ntp_timestamp_ms;
+ playout_timestamp_ntp_time_ms_ = time_ms;
+}
+
+absl::optional<int64_t>
+ChannelReceive::GetCurrentEstimatedPlayoutNtpTimestampMs(int64_t now_ms) const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!playout_timestamp_ntp_ || !playout_timestamp_ntp_time_ms_)
+ return absl::nullopt;
+
+ int64_t elapsed_ms = now_ms - *playout_timestamp_ntp_time_ms_;
+ return *playout_timestamp_ntp_ + elapsed_ms;
+}
+
+bool ChannelReceive::SetBaseMinimumPlayoutDelayMs(int delay_ms) {
+ event_log_->Log(
+ std::make_unique<RtcEventNetEqSetMinimumDelay>(remote_ssrc_, delay_ms));
+ return acm_receiver_.SetBaseMinimumDelayMs(delay_ms);
+}
+
+int ChannelReceive::GetBaseMinimumPlayoutDelayMs() const {
+ return acm_receiver_.GetBaseMinimumDelayMs();
+}
+
+absl::optional<Syncable::Info> ChannelReceive::GetSyncInfo() const {
+ // TODO(bugs.webrtc.org/11993): This should run on the network thread.
+ // We get here via RtpStreamsSynchronizer. Once that's done, many of
+ // these locks aren't needed.
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ Syncable::Info info;
+ if (rtp_rtcp_->RemoteNTP(&info.capture_time_ntp_secs,
+ &info.capture_time_ntp_frac,
+ /*rtcp_arrival_time_secs=*/nullptr,
+ /*rtcp_arrival_time_frac=*/nullptr,
+ &info.capture_time_source_clock) != 0) {
+ return absl::nullopt;
+ }
+
+ if (!last_received_rtp_timestamp_ || !last_received_rtp_system_time_ms_) {
+ return absl::nullopt;
+ }
+ info.latest_received_capture_timestamp = *last_received_rtp_timestamp_;
+ info.latest_receive_time_ms = *last_received_rtp_system_time_ms_;
+
+ int jitter_buffer_delay = acm_receiver_.FilteredCurrentDelayMs();
+ info.current_delay_ms = jitter_buffer_delay + playout_delay_ms_;
+
+ return info;
+}
+
+void ChannelReceive::UpdatePlayoutTimestamp(bool rtcp, int64_t now_ms) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // TODO(bugs.webrtc.org/11993): Expect to be called exclusively on the
+ // network thread. Once that's done, we won't need video_sync_lock_.
+
+ jitter_buffer_playout_timestamp_ = acm_receiver_.GetPlayoutTimestamp();
+
+ if (!jitter_buffer_playout_timestamp_) {
+ // This can happen if this channel has not received any RTP packets. In
+ // this case, NetEq is not capable of computing a playout timestamp.
+ return;
+ }
+
+ uint16_t delay_ms = 0;
+ if (_audioDeviceModulePtr->PlayoutDelay(&delay_ms) == -1) {
+ RTC_DLOG(LS_WARNING)
+ << "ChannelReceive::UpdatePlayoutTimestamp() failed to read"
+ " playout delay from the ADM";
+ return;
+ }
+
+ RTC_DCHECK(jitter_buffer_playout_timestamp_);
+ uint32_t playout_timestamp = *jitter_buffer_playout_timestamp_;
+
+ // Remove the playout delay.
+ playout_timestamp -= (delay_ms * (GetRtpTimestampRateHz() / 1000));
+
+ if (!rtcp && playout_timestamp != playout_timestamp_rtp_) {
+ playout_timestamp_rtp_ = playout_timestamp;
+ playout_timestamp_rtp_time_ms_ = now_ms;
+ }
+ playout_delay_ms_ = delay_ms;
+}
+
+int ChannelReceive::GetRtpTimestampRateHz() const {
+ const auto decoder = acm_receiver_.LastDecoder();
+ // Default to the playout frequency if we've not gotten any packets yet.
+ // TODO(ossu): Zero clockrate can only happen if we've added an external
+ // decoder for a format we don't support internally. Remove once that way of
+ // adding decoders is gone!
+ // TODO(kwiberg): `decoder->second.clockrate_hz` is an RTP clockrate as it
+ // should, but `acm_receiver_.last_output_sample_rate_hz()` is a codec sample
+ // rate, which is not always the same thing.
+ return (decoder && decoder->second.clockrate_hz != 0)
+ ? decoder->second.clockrate_hz
+ : acm_receiver_.last_output_sample_rate_hz();
+}
+
+} // namespace
+
+std::unique_ptr<ChannelReceiveInterface> CreateChannelReceive(
+ Clock* clock,
+ NetEqFactory* neteq_factory,
+ AudioDeviceModule* audio_device_module,
+ Transport* rtcp_send_transport,
+ RtcEventLog* rtc_event_log,
+ uint32_t local_ssrc,
+ uint32_t remote_ssrc,
+ size_t jitter_buffer_max_packets,
+ bool jitter_buffer_fast_playout,
+ int jitter_buffer_min_delay_ms,
+ bool enable_non_sender_rtt,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ RtcpEventObserver* rtcp_event_observer) {
+ return std::make_unique<ChannelReceive>(
+ clock, neteq_factory, audio_device_module, rtcp_send_transport,
+ rtc_event_log, local_ssrc, remote_ssrc, jitter_buffer_max_packets,
+ jitter_buffer_fast_playout, jitter_buffer_min_delay_ms,
+ enable_non_sender_rtt, decoder_factory, codec_pair_id,
+ std::move(frame_decryptor), crypto_options, std::move(frame_transformer),
+ rtcp_event_observer);
+}
+
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_receive.h b/third_party/libwebrtc/audio/channel_receive.h
new file mode 100644
index 0000000000..1ad3be781b
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive.h
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_CHANNEL_RECEIVE_H_
+#define AUDIO_CHANNEL_RECEIVE_H_
+
+#include <map>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/audio/audio_mixer.h"
+#include "api/audio_codecs/audio_decoder_factory.h"
+#include "api/call/audio_sink.h"
+#include "api/call/transport.h"
+#include "api/crypto/crypto_options.h"
+#include "api/frame_transformer_interface.h"
+#include "api/neteq/neteq_factory.h"
+#include "api/transport/rtp/rtp_source.h"
+#include "call/rtp_packet_sink_interface.h"
+#include "call/syncable.h"
+#include "modules/audio_coding/include/audio_coding_module_typedefs.h"
+#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
+#include "modules/rtp_rtcp/source/source_tracker.h"
+#include "system_wrappers/include/clock.h"
+
+// TODO(solenberg, nisse): This file contains a few NOLINT marks, to silence
+// warnings about use of unsigned short.
+// These need cleanup, in a separate cl.
+
+namespace rtc {
+class TimestampWrapAroundHandler;
+}
+
+namespace webrtc {
+
+class AudioDeviceModule;
+class FrameDecryptorInterface;
+class PacketRouter;
+class RateLimiter;
+class ReceiveStatistics;
+class RtcEventLog;
+class RtpPacketReceived;
+class RtpRtcp;
+
+struct CallReceiveStatistics {
+ int cumulativeLost;
+ unsigned int jitterSamples;
+ int64_t payload_bytes_rcvd = 0;
+ int64_t header_and_padding_bytes_rcvd = 0;
+ int packetsReceived;
+ uint32_t nacks_sent = 0;
+ // The capture NTP time (in local timebase) of the first played out audio
+ // frame.
+ int64_t capture_start_ntp_time_ms_;
+ // The timestamp at which the last packet was received, i.e. the time of the
+ // local clock when it was received - not the RTP timestamp of that packet.
+ // https://w3c.github.io/webrtc-stats/#dom-rtcinboundrtpstreamstats-lastpacketreceivedtimestamp
+ absl::optional<int64_t> last_packet_received_timestamp_ms;
+ // Remote outbound stats derived by the received RTCP sender reports.
+ // Note that the timestamps below correspond to the time elapsed since the
+ // Unix epoch.
+ // https://w3c.github.io/webrtc-stats/#remoteoutboundrtpstats-dict*
+ absl::optional<int64_t> last_sender_report_timestamp_ms;
+ absl::optional<int64_t> last_sender_report_remote_timestamp_ms;
+ uint32_t sender_reports_packets_sent = 0;
+ uint64_t sender_reports_bytes_sent = 0;
+ uint64_t sender_reports_reports_count = 0;
+ absl::optional<TimeDelta> round_trip_time;
+ TimeDelta total_round_trip_time = TimeDelta::Zero();
+ int round_trip_time_measurements;
+};
+
+namespace voe {
+
+class ChannelSendInterface;
+
+// Interface class needed for AudioReceiveStreamInterface tests that use a
+// MockChannelReceive.
+
+class ChannelReceiveInterface : public RtpPacketSinkInterface {
+ public:
+ virtual ~ChannelReceiveInterface() = default;
+
+ virtual void SetSink(AudioSinkInterface* sink) = 0;
+
+ virtual void SetReceiveCodecs(
+ const std::map<int, SdpAudioFormat>& codecs) = 0;
+
+ virtual void StartPlayout() = 0;
+ virtual void StopPlayout() = 0;
+
+ // Payload type and format of last received RTP packet, if any.
+ virtual absl::optional<std::pair<int, SdpAudioFormat>> GetReceiveCodec()
+ const = 0;
+
+ virtual void ReceivedRTCPPacket(const uint8_t* data, size_t length) = 0;
+
+ virtual void SetChannelOutputVolumeScaling(float scaling) = 0;
+ virtual int GetSpeechOutputLevelFullRange() const = 0;
+ // See description of "totalAudioEnergy" in the WebRTC stats spec:
+ // https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamtrackstats-totalaudioenergy
+ virtual double GetTotalOutputEnergy() const = 0;
+ virtual double GetTotalOutputDuration() const = 0;
+
+ // Stats.
+ virtual NetworkStatistics GetNetworkStatistics(
+ bool get_and_clear_legacy_stats) const = 0;
+ virtual AudioDecodingCallStats GetDecodingCallStatistics() const = 0;
+
+ // Audio+Video Sync.
+ virtual uint32_t GetDelayEstimate() const = 0;
+ virtual bool SetMinimumPlayoutDelay(int delay_ms) = 0;
+ virtual bool GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
+ int64_t* time_ms) const = 0;
+ virtual void SetEstimatedPlayoutNtpTimestampMs(int64_t ntp_timestamp_ms,
+ int64_t time_ms) = 0;
+ virtual absl::optional<int64_t> GetCurrentEstimatedPlayoutNtpTimestampMs(
+ int64_t now_ms) const = 0;
+
+ // Audio quality.
+ // Base minimum delay sets lower bound on minimum delay value which
+ // determines minimum delay until audio playout.
+ virtual bool SetBaseMinimumPlayoutDelayMs(int delay_ms) = 0;
+ virtual int GetBaseMinimumPlayoutDelayMs() const = 0;
+
+ // Produces the transport-related timestamps; current_delay_ms is left unset.
+ virtual absl::optional<Syncable::Info> GetSyncInfo() const = 0;
+
+ virtual void RegisterReceiverCongestionControlObjects(
+ PacketRouter* packet_router) = 0;
+ virtual void ResetReceiverCongestionControlObjects() = 0;
+
+ virtual CallReceiveStatistics GetRTCPStatistics() const = 0;
+ virtual void SetNACKStatus(bool enable, int max_packets) = 0;
+ virtual void SetNonSenderRttMeasurement(bool enabled) = 0;
+
+ virtual AudioMixer::Source::AudioFrameInfo GetAudioFrameWithInfo(
+ int sample_rate_hz,
+ AudioFrame* audio_frame) = 0;
+
+ virtual int PreferredSampleRate() const = 0;
+
+ // Sets the source tracker to notify about "delivered" packets when output is
+ // muted.
+ virtual void SetSourceTracker(SourceTracker* source_tracker) = 0;
+
+ // Associate to a send channel.
+ // Used for obtaining RTT for a receive-only channel.
+ virtual void SetAssociatedSendChannel(
+ const ChannelSendInterface* channel) = 0;
+
+ // Sets a frame transformer between the depacketizer and the decoder, to
+ // transform the received frames before decoding them.
+ virtual void SetDepacketizerToDecoderFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface>
+ frame_transformer) = 0;
+
+ virtual void SetFrameDecryptor(
+ rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) = 0;
+
+ virtual void OnLocalSsrcChange(uint32_t local_ssrc) = 0;
+ virtual uint32_t GetLocalSsrc() const = 0;
+};
+
+std::unique_ptr<ChannelReceiveInterface> CreateChannelReceive(
+ Clock* clock,
+ NetEqFactory* neteq_factory,
+ AudioDeviceModule* audio_device_module,
+ Transport* rtcp_send_transport,
+ RtcEventLog* rtc_event_log,
+ uint32_t local_ssrc,
+ uint32_t remote_ssrc,
+ size_t jitter_buffer_max_packets,
+ bool jitter_buffer_fast_playout,
+ int jitter_buffer_min_delay_ms,
+ bool enable_non_sender_rtt,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ absl::optional<AudioCodecPairId> codec_pair_id,
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ RtcpEventObserver* rtcp_event_observer);
+
+} // namespace voe
+} // namespace webrtc
+
+#endif // AUDIO_CHANNEL_RECEIVE_H_
diff --git a/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.cc b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.cc
new file mode 100644
index 0000000000..e8ba6ded47
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.cc
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_receive_frame_transformer_delegate.h"
+
+#include <utility>
+
+#include "rtc_base/buffer.h"
+
+namespace webrtc {
+namespace {
+
+class TransformableIncomingAudioFrame
+ : public TransformableAudioFrameInterface {
+ public:
+ TransformableIncomingAudioFrame(rtc::ArrayView<const uint8_t> payload,
+ const RTPHeader& header,
+ uint32_t ssrc)
+ : payload_(payload.data(), payload.size()),
+ header_(header),
+ ssrc_(ssrc) {}
+ ~TransformableIncomingAudioFrame() override = default;
+ rtc::ArrayView<const uint8_t> GetData() const override { return payload_; }
+
+ void SetData(rtc::ArrayView<const uint8_t> data) override {
+ payload_.SetData(data.data(), data.size());
+ }
+
+ uint8_t GetPayloadType() const override { return header_.payloadType; }
+ uint32_t GetSsrc() const override { return ssrc_; }
+ uint32_t GetTimestamp() const override { return header_.timestamp; }
+ const RTPHeader& GetHeader() const override { return header_; }
+ rtc::ArrayView<const uint32_t> GetContributingSources() const override {
+ return rtc::ArrayView<const uint32_t>(header_.arrOfCSRCs, header_.numCSRCs);
+ }
+ Direction GetDirection() const override { return Direction::kReceiver; }
+
+ private:
+ rtc::Buffer payload_;
+ RTPHeader header_;
+ uint32_t ssrc_;
+};
+} // namespace
+
+ChannelReceiveFrameTransformerDelegate::ChannelReceiveFrameTransformerDelegate(
+ ReceiveFrameCallback receive_frame_callback,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ TaskQueueBase* channel_receive_thread)
+ : receive_frame_callback_(receive_frame_callback),
+ frame_transformer_(std::move(frame_transformer)),
+ channel_receive_thread_(channel_receive_thread) {}
+
+void ChannelReceiveFrameTransformerDelegate::Init() {
+ RTC_DCHECK_RUN_ON(&sequence_checker_);
+ frame_transformer_->RegisterTransformedFrameCallback(
+ rtc::scoped_refptr<TransformedFrameCallback>(this));
+}
+
+void ChannelReceiveFrameTransformerDelegate::Reset() {
+ RTC_DCHECK_RUN_ON(&sequence_checker_);
+ frame_transformer_->UnregisterTransformedFrameCallback();
+ frame_transformer_ = nullptr;
+ receive_frame_callback_ = ReceiveFrameCallback();
+}
+
+void ChannelReceiveFrameTransformerDelegate::Transform(
+ rtc::ArrayView<const uint8_t> packet,
+ const RTPHeader& header,
+ uint32_t ssrc) {
+ RTC_DCHECK_RUN_ON(&sequence_checker_);
+ frame_transformer_->Transform(
+ std::make_unique<TransformableIncomingAudioFrame>(packet, header, ssrc));
+}
+
+void ChannelReceiveFrameTransformerDelegate::OnTransformedFrame(
+ std::unique_ptr<TransformableFrameInterface> frame) {
+ rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate(this);
+ channel_receive_thread_->PostTask(
+ [delegate = std::move(delegate), frame = std::move(frame)]() mutable {
+ delegate->ReceiveFrame(std::move(frame));
+ });
+}
+
+void ChannelReceiveFrameTransformerDelegate::ReceiveFrame(
+ std::unique_ptr<TransformableFrameInterface> frame) const {
+ RTC_DCHECK_RUN_ON(&sequence_checker_);
+ if (!receive_frame_callback_)
+ return;
+ RTC_CHECK_EQ(frame->GetDirection(),
+ TransformableFrameInterface::Direction::kReceiver);
+ auto* transformed_frame =
+ static_cast<TransformableIncomingAudioFrame*>(frame.get());
+ receive_frame_callback_(transformed_frame->GetData(),
+ transformed_frame->GetHeader());
+}
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h
new file mode 100644
index 0000000000..04ad7c4695
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
+#define AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
+
+#include <memory>
+
+#include "api/frame_transformer_interface.h"
+#include "api/sequence_checker.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "rtc_base/task_queue.h"
+#include "rtc_base/thread.h"
+
+namespace webrtc {
+
+// Delegates calls to FrameTransformerInterface to transform frames, and to
+// ChannelReceive to receive the transformed frames using the
+// `receive_frame_callback_` on the `channel_receive_thread_`.
+class ChannelReceiveFrameTransformerDelegate : public TransformedFrameCallback {
+ public:
+ using ReceiveFrameCallback =
+ std::function<void(rtc::ArrayView<const uint8_t> packet,
+ const RTPHeader& header)>;
+ ChannelReceiveFrameTransformerDelegate(
+ ReceiveFrameCallback receive_frame_callback,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ TaskQueueBase* channel_receive_thread);
+
+ // Registers `this` as callback for `frame_transformer_`, to get the
+ // transformed frames.
+ void Init();
+
+ // Unregisters and releases the `frame_transformer_` reference, and resets
+ // `receive_frame_callback_` on `channel_receive_thread_`. Called from
+ // ChannelReceive destructor to prevent running the callback on a dangling
+ // channel.
+ void Reset();
+
+ // Delegates the call to FrameTransformerInterface::Transform, to transform
+ // the frame asynchronously.
+ void Transform(rtc::ArrayView<const uint8_t> packet,
+ const RTPHeader& header,
+ uint32_t ssrc);
+
+ // Implements TransformedFrameCallback. Can be called on any thread.
+ void OnTransformedFrame(
+ std::unique_ptr<TransformableFrameInterface> frame) override;
+
+ // Delegates the call to ChannelReceive::OnReceivedPayloadData on the
+ // `channel_receive_thread_`, by calling `receive_frame_callback_`.
+ void ReceiveFrame(std::unique_ptr<TransformableFrameInterface> frame) const;
+
+ protected:
+ ~ChannelReceiveFrameTransformerDelegate() override = default;
+
+ private:
+ RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
+ ReceiveFrameCallback receive_frame_callback_
+ RTC_GUARDED_BY(sequence_checker_);
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
+ RTC_GUARDED_BY(sequence_checker_);
+ TaskQueueBase* const channel_receive_thread_;
+};
+
+} // namespace webrtc
+#endif // AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
diff --git a/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate_unittest.cc b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate_unittest.cc
new file mode 100644
index 0000000000..e31dd9f876
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate_unittest.cc
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_receive_frame_transformer_delegate.h"
+
+#include <memory>
+#include <utility>
+
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/mock_frame_transformer.h"
+#include "test/mock_transformable_frame.h"
+
+namespace webrtc {
+namespace {
+
+using ::testing::NiceMock;
+using ::testing::SaveArg;
+
+class MockChannelReceive {
+ public:
+ MOCK_METHOD(void,
+ ReceiveFrame,
+ (rtc::ArrayView<const uint8_t> packet, const RTPHeader& header));
+
+ ChannelReceiveFrameTransformerDelegate::ReceiveFrameCallback callback() {
+ return [this](rtc::ArrayView<const uint8_t> packet,
+ const RTPHeader& header) { ReceiveFrame(packet, header); };
+ }
+};
+
+// Test that the delegate registers itself with the frame transformer on Init().
+TEST(ChannelReceiveFrameTransformerDelegateTest,
+ RegisterTransformedFrameCallbackOnInit) {
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<MockFrameTransformer>();
+ rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelReceiveFrameTransformerDelegate>(
+ ChannelReceiveFrameTransformerDelegate::ReceiveFrameCallback(),
+ mock_frame_transformer, nullptr);
+ EXPECT_CALL(*mock_frame_transformer, RegisterTransformedFrameCallback);
+ delegate->Init();
+}
+
+// Test that the delegate unregisters itself from the frame transformer on
+// Reset().
+TEST(ChannelReceiveFrameTransformerDelegateTest,
+ UnregisterTransformedFrameCallbackOnReset) {
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<MockFrameTransformer>();
+ rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelReceiveFrameTransformerDelegate>(
+ ChannelReceiveFrameTransformerDelegate::ReceiveFrameCallback(),
+ mock_frame_transformer, nullptr);
+ EXPECT_CALL(*mock_frame_transformer, UnregisterTransformedFrameCallback);
+ delegate->Reset();
+}
+
+// Test that when the delegate receives a transformed frame from the frame
+// transformer, it passes it to the channel using the ReceiveFrameCallback.
+TEST(ChannelReceiveFrameTransformerDelegateTest,
+ TransformRunsChannelReceiveCallback) {
+ rtc::AutoThread main_thread;
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<NiceMock<MockFrameTransformer>>();
+ MockChannelReceive mock_channel;
+ rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelReceiveFrameTransformerDelegate>(
+ mock_channel.callback(), mock_frame_transformer,
+ rtc::Thread::Current());
+ rtc::scoped_refptr<TransformedFrameCallback> callback;
+ EXPECT_CALL(*mock_frame_transformer, RegisterTransformedFrameCallback)
+ .WillOnce(SaveArg<0>(&callback));
+ delegate->Init();
+ ASSERT_TRUE(callback);
+
+ const uint8_t data[] = {1, 2, 3, 4};
+ rtc::ArrayView<const uint8_t> packet(data, sizeof(data));
+ RTPHeader header;
+ EXPECT_CALL(mock_channel, ReceiveFrame);
+ ON_CALL(*mock_frame_transformer, Transform)
+ .WillByDefault(
+ [&callback](std::unique_ptr<TransformableFrameInterface> frame) {
+ callback->OnTransformedFrame(std::move(frame));
+ });
+ delegate->Transform(packet, header, 1111 /*ssrc*/);
+ rtc::ThreadManager::ProcessAllMessageQueuesForTesting();
+}
+
+// Test that if the delegate receives a transformed frame after it has been
+// reset, it does not run the ReceiveFrameCallback, as the channel is destroyed
+// after resetting the delegate.
+TEST(ChannelReceiveFrameTransformerDelegateTest,
+ OnTransformedDoesNotRunChannelReceiveCallbackAfterReset) {
+ rtc::AutoThread main_thread;
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<testing::NiceMock<MockFrameTransformer>>();
+ MockChannelReceive mock_channel;
+ rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelReceiveFrameTransformerDelegate>(
+ mock_channel.callback(), mock_frame_transformer,
+ rtc::Thread::Current());
+
+ delegate->Reset();
+ EXPECT_CALL(mock_channel, ReceiveFrame).Times(0);
+ delegate->OnTransformedFrame(std::make_unique<MockTransformableFrame>());
+ rtc::ThreadManager::ProcessAllMessageQueuesForTesting();
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_receive_unittest.cc b/third_party/libwebrtc/audio/channel_receive_unittest.cc
new file mode 100644
index 0000000000..3d9baebe89
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_receive_unittest.cc
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2023 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_receive.h"
+
+#include "api/crypto/frame_decryptor_interface.h"
+#include "api/task_queue/default_task_queue_factory.h"
+#include "modules/audio_device/include/audio_device.h"
+#include "modules/audio_device/include/mock_audio_device.h"
+#include "rtc_base/thread.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/mock_transport.h"
+#include "test/time_controller/simulated_time_controller.h"
+
+namespace webrtc {
+namespace voe {
+
+TEST(ChannelReceiveTest, CreateAndDestroy) {
+ GlobalSimulatedTimeController time_controller(Timestamp::Seconds(5555));
+ uint32_t local_ssrc = 1111;
+ uint32_t remote_ssrc = 2222;
+ webrtc::CryptoOptions crypto_options;
+ rtc::scoped_refptr<test::MockAudioDeviceModule> audio_device_module =
+ test::MockAudioDeviceModule::CreateNice();
+ MockTransport transport;
+ auto channel = CreateChannelReceive(
+ time_controller.GetClock(),
+ /* neteq_factory= */ nullptr, audio_device_module.get(), &transport,
+ /* rtc_event_log= */ nullptr, local_ssrc, remote_ssrc,
+ /* jitter_buffer_max_packets= */ 0,
+ /* jitter_buffer_fast_playout= */ false,
+ /* jitter_buffer_min_delay_ms= */ 0,
+ /* enable_non_sender_rtt= */ false,
+ /* decoder_factory= */ nullptr,
+ /* codec_pair_id= */ absl::nullopt,
+ /* frame_decryptor_interface= */ nullptr, crypto_options,
+ /* frame_transformer= */ nullptr);
+ EXPECT_TRUE(!!channel);
+}
+
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_send.cc b/third_party/libwebrtc/audio/channel_send.cc
new file mode 100644
index 0000000000..9609ac8a31
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_send.cc
@@ -0,0 +1,983 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_send.h"
+
+#include <algorithm>
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/array_view.h"
+#include "api/call/transport.h"
+#include "api/crypto/frame_encryptor_interface.h"
+#include "api/rtc_event_log/rtc_event_log.h"
+#include "api/sequence_checker.h"
+#include "audio/channel_send_frame_transformer_delegate.h"
+#include "audio/utility/audio_frame_operations.h"
+#include "call/rtp_transport_controller_send_interface.h"
+#include "logging/rtc_event_log/events/rtc_event_audio_playout.h"
+#include "modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor_config.h"
+#include "modules/audio_coding/include/audio_coding_module.h"
+#include "modules/audio_processing/rms_level.h"
+#include "modules/pacing/packet_router.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_impl2.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/event.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/numerics/safe_conversions.h"
+#include "rtc_base/race_checker.h"
+#include "rtc_base/rate_limiter.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/task_queue.h"
+#include "rtc_base/time_utils.h"
+#include "rtc_base/trace_event.h"
+#include "system_wrappers/include/clock.h"
+#include "system_wrappers/include/metrics.h"
+
+namespace webrtc {
+namespace voe {
+
+namespace {
+
+constexpr int64_t kMaxRetransmissionWindowMs = 1000;
+constexpr int64_t kMinRetransmissionWindowMs = 30;
+
+class RtpPacketSenderProxy;
+class TransportSequenceNumberProxy;
+class VoERtcpObserver;
+
+class RtcpCounterObserver : public RtcpPacketTypeCounterObserver {
+ public:
+ explicit RtcpCounterObserver(uint32_t ssrc) : ssrc_(ssrc) {}
+
+ void RtcpPacketTypesCounterUpdated(
+ uint32_t ssrc, const RtcpPacketTypeCounter& packet_counter) override {
+ if (ssrc_ != ssrc) {
+ return;
+ }
+
+ MutexLock lock(&mutex_);
+ packet_counter_ = packet_counter;
+ }
+
+ RtcpPacketTypeCounter GetCounts() {
+ MutexLock lock(&mutex_);
+ return packet_counter_;
+ }
+
+ private:
+ Mutex mutex_;
+ const uint32_t ssrc_;
+ RtcpPacketTypeCounter packet_counter_;
+};
+
+class ChannelSend : public ChannelSendInterface,
+ public AudioPacketizationCallback, // receive encoded
+ // packets from the ACM
+ public RtcpPacketTypeCounterObserver {
+ public:
+ ChannelSend(Clock* clock,
+ TaskQueueFactory* task_queue_factory,
+ Transport* rtp_transport,
+ RtcpRttStats* rtcp_rtt_stats,
+ RtcEventLog* rtc_event_log,
+ FrameEncryptorInterface* frame_encryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ bool extmap_allow_mixed,
+ int rtcp_report_interval_ms,
+ uint32_t ssrc,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ TransportFeedbackObserver* feedback_observer,
+ const FieldTrialsView& field_trials);
+
+ ~ChannelSend() override;
+
+ // Send using this encoder, with this payload type.
+ void SetEncoder(int payload_type,
+ std::unique_ptr<AudioEncoder> encoder) override;
+ void ModifyEncoder(rtc::FunctionView<void(std::unique_ptr<AudioEncoder>*)>
+ modifier) override;
+ void CallEncoder(rtc::FunctionView<void(AudioEncoder*)> modifier) override;
+
+ // API methods
+ void StartSend() override;
+ void StopSend() override;
+
+ // Codecs
+ void OnBitrateAllocation(BitrateAllocationUpdate update) override;
+ int GetTargetBitrate() const override;
+
+ // Network
+ void ReceivedRTCPPacket(const uint8_t* data, size_t length) override;
+
+ // Muting, Volume and Level.
+ void SetInputMute(bool enable) override;
+
+ // Stats.
+ ANAStats GetANAStatistics() const override;
+
+ // Used by AudioSendStream.
+ RtpRtcpInterface* GetRtpRtcp() const override;
+
+ void RegisterCngPayloadType(int payload_type, int payload_frequency) override;
+
+ // DTMF.
+ bool SendTelephoneEventOutband(int event, int duration_ms) override;
+ void SetSendTelephoneEventPayloadType(int payload_type,
+ int payload_frequency) override;
+
+ // RTP+RTCP
+ void SetSendAudioLevelIndicationStatus(bool enable, int id) override;
+
+ void RegisterSenderCongestionControlObjects(
+ RtpTransportControllerSendInterface* transport,
+ RtcpBandwidthObserver* bandwidth_observer) override;
+ void ResetSenderCongestionControlObjects() override;
+ void SetRTCP_CNAME(absl::string_view c_name) override;
+ std::vector<ReportBlock> GetRemoteRTCPReportBlocks() const override;
+ CallSendStatistics GetRTCPStatistics() const override;
+
+ // ProcessAndEncodeAudio() posts a task on the shared encoder task queue,
+ // which in turn calls (on the queue) ProcessAndEncodeAudioOnTaskQueue() where
+ // the actual processing of the audio takes place. The processing mainly
+ // consists of encoding and preparing the result for sending by adding it to a
+ // send queue.
+ // The main reason for using a task queue here is to release the native,
+ // OS-specific, audio capture thread as soon as possible to ensure that it
+ // can go back to sleep and be prepared to deliver an new captured audio
+ // packet.
+ void ProcessAndEncodeAudio(std::unique_ptr<AudioFrame> audio_frame) override;
+
+ int64_t GetRTT() const override;
+
+ // E2EE Custom Audio Frame Encryption
+ void SetFrameEncryptor(
+ rtc::scoped_refptr<FrameEncryptorInterface> frame_encryptor) override;
+
+ // Sets a frame transformer between encoder and packetizer, to transform
+ // encoded frames before sending them out the network.
+ void SetEncoderToPacketizerFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer)
+ override;
+
+ // RtcpPacketTypeCounterObserver.
+ void RtcpPacketTypesCounterUpdated(
+ uint32_t ssrc,
+ const RtcpPacketTypeCounter& packet_counter) override;
+
+ void OnUplinkPacketLossRate(float packet_loss_rate);
+
+ private:
+ // From AudioPacketizationCallback in the ACM
+ int32_t SendData(AudioFrameType frameType,
+ uint8_t payloadType,
+ uint32_t rtp_timestamp,
+ const uint8_t* payloadData,
+ size_t payloadSize,
+ int64_t absolute_capture_timestamp_ms) override;
+
+ bool InputMute() const;
+
+ int32_t SendRtpAudio(AudioFrameType frameType,
+ uint8_t payloadType,
+ uint32_t rtp_timestamp,
+ rtc::ArrayView<const uint8_t> payload,
+ int64_t absolute_capture_timestamp_ms)
+ RTC_RUN_ON(encoder_queue_);
+
+ void OnReceivedRtt(int64_t rtt_ms);
+
+ void InitFrameTransformerDelegate(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer);
+
+ // Thread checkers document and lock usage of some methods on voe::Channel to
+ // specific threads we know about. The goal is to eventually split up
+ // voe::Channel into parts with single-threaded semantics, and thereby reduce
+ // the need for locks.
+ SequenceChecker worker_thread_checker_;
+ // Methods accessed from audio and video threads are checked for sequential-
+ // only access. We don't necessarily own and control these threads, so thread
+ // checkers cannot be used. E.g. Chromium may transfer "ownership" from one
+ // audio thread to another, but access is still sequential.
+ rtc::RaceChecker audio_thread_race_checker_;
+
+ mutable Mutex volume_settings_mutex_;
+
+ const uint32_t ssrc_;
+ bool sending_ RTC_GUARDED_BY(&worker_thread_checker_) = false;
+
+ RtcEventLog* const event_log_;
+
+ std::unique_ptr<ModuleRtpRtcpImpl2> rtp_rtcp_;
+ std::unique_ptr<RTPSenderAudio> rtp_sender_audio_;
+
+ std::unique_ptr<AudioCodingModule> audio_coding_;
+
+ // This is just an offset, RTP module will add its own random offset.
+ uint32_t timestamp_ RTC_GUARDED_BY(audio_thread_race_checker_) = 0;
+
+ RmsLevel rms_level_ RTC_GUARDED_BY(encoder_queue_);
+ bool input_mute_ RTC_GUARDED_BY(volume_settings_mutex_) = false;
+ bool previous_frame_muted_ RTC_GUARDED_BY(encoder_queue_) = false;
+
+ // RtcpBandwidthObserver
+ const std::unique_ptr<VoERtcpObserver> rtcp_observer_;
+
+ const std::unique_ptr<RtcpCounterObserver> rtcp_counter_observer_;
+
+ PacketRouter* packet_router_ RTC_GUARDED_BY(&worker_thread_checker_) =
+ nullptr;
+ TransportFeedbackObserver* const feedback_observer_;
+ const std::unique_ptr<RtpPacketSenderProxy> rtp_packet_pacer_proxy_;
+ const std::unique_ptr<RateLimiter> retransmission_rate_limiter_;
+
+ SequenceChecker construction_thread_;
+
+ std::atomic<bool> include_audio_level_indication_ = false;
+ std::atomic<bool> encoder_queue_is_active_ = false;
+
+ // E2EE Audio Frame Encryption
+ rtc::scoped_refptr<FrameEncryptorInterface> frame_encryptor_
+ RTC_GUARDED_BY(encoder_queue_);
+ // E2EE Frame Encryption Options
+ const webrtc::CryptoOptions crypto_options_;
+
+ // Delegates calls to a frame transformer to transform audio, and
+ // receives callbacks with the transformed frames; delegates calls to
+ // ChannelSend::SendRtpAudio to send the transformed audio.
+ rtc::scoped_refptr<ChannelSendFrameTransformerDelegate>
+ frame_transformer_delegate_ RTC_GUARDED_BY(encoder_queue_);
+
+ mutable Mutex rtcp_counter_mutex_;
+ RtcpPacketTypeCounter rtcp_packet_type_counter_
+ RTC_GUARDED_BY(rtcp_counter_mutex_);
+
+ // Defined last to ensure that there are no running tasks when the other
+ // members are destroyed.
+ rtc::TaskQueue encoder_queue_;
+};
+
+const int kTelephoneEventAttenuationdB = 10;
+
+class RtpPacketSenderProxy : public RtpPacketSender {
+ public:
+ RtpPacketSenderProxy() : rtp_packet_pacer_(nullptr) {}
+
+ void SetPacketPacer(RtpPacketSender* rtp_packet_pacer) {
+ RTC_DCHECK(thread_checker_.IsCurrent());
+ MutexLock lock(&mutex_);
+ rtp_packet_pacer_ = rtp_packet_pacer;
+ }
+
+ void EnqueuePackets(
+ std::vector<std::unique_ptr<RtpPacketToSend>> packets) override {
+ MutexLock lock(&mutex_);
+ rtp_packet_pacer_->EnqueuePackets(std::move(packets));
+ }
+
+ void RemovePacketsForSsrc(uint32_t ssrc) override {
+ MutexLock lock(&mutex_);
+ rtp_packet_pacer_->RemovePacketsForSsrc(ssrc);
+ }
+
+ private:
+ SequenceChecker thread_checker_;
+ Mutex mutex_;
+ RtpPacketSender* rtp_packet_pacer_ RTC_GUARDED_BY(&mutex_);
+};
+
+class VoERtcpObserver : public RtcpBandwidthObserver {
+ public:
+ explicit VoERtcpObserver(ChannelSend* owner)
+ : owner_(owner), bandwidth_observer_(nullptr) {}
+ ~VoERtcpObserver() override {}
+
+ void SetBandwidthObserver(RtcpBandwidthObserver* bandwidth_observer) {
+ MutexLock lock(&mutex_);
+ bandwidth_observer_ = bandwidth_observer;
+ }
+
+ void OnReceivedEstimatedBitrate(uint32_t bitrate) override {
+ MutexLock lock(&mutex_);
+ if (bandwidth_observer_) {
+ bandwidth_observer_->OnReceivedEstimatedBitrate(bitrate);
+ }
+ }
+
+ void OnReceivedRtcpReceiverReport(const ReportBlockList& report_blocks,
+ int64_t rtt,
+ int64_t now_ms) override {
+ {
+ MutexLock lock(&mutex_);
+ if (bandwidth_observer_) {
+ bandwidth_observer_->OnReceivedRtcpReceiverReport(report_blocks, rtt,
+ now_ms);
+ }
+ }
+ // TODO(mflodman): Do we need to aggregate reports here or can we jut send
+ // what we get? I.e. do we ever get multiple reports bundled into one RTCP
+ // report for VoiceEngine?
+ if (report_blocks.empty())
+ return;
+
+ int fraction_lost_aggregate = 0;
+ int total_number_of_packets = 0;
+
+ // If receiving multiple report blocks, calculate the weighted average based
+ // on the number of packets a report refers to.
+ for (ReportBlockList::const_iterator block_it = report_blocks.begin();
+ block_it != report_blocks.end(); ++block_it) {
+ // Find the previous extended high sequence number for this remote SSRC,
+ // to calculate the number of RTP packets this report refers to. Ignore if
+ // we haven't seen this SSRC before.
+ std::map<uint32_t, uint32_t>::iterator seq_num_it =
+ extended_max_sequence_number_.find(block_it->source_ssrc);
+ int number_of_packets = 0;
+ if (seq_num_it != extended_max_sequence_number_.end()) {
+ number_of_packets =
+ block_it->extended_highest_sequence_number - seq_num_it->second;
+ }
+ fraction_lost_aggregate += number_of_packets * block_it->fraction_lost;
+ total_number_of_packets += number_of_packets;
+
+ extended_max_sequence_number_[block_it->source_ssrc] =
+ block_it->extended_highest_sequence_number;
+ }
+ int weighted_fraction_lost = 0;
+ if (total_number_of_packets > 0) {
+ weighted_fraction_lost =
+ (fraction_lost_aggregate + total_number_of_packets / 2) /
+ total_number_of_packets;
+ }
+ owner_->OnUplinkPacketLossRate(weighted_fraction_lost / 255.0f);
+ }
+
+ private:
+ ChannelSend* owner_;
+ // Maps remote side ssrc to extended highest sequence number received.
+ std::map<uint32_t, uint32_t> extended_max_sequence_number_;
+ Mutex mutex_;
+ RtcpBandwidthObserver* bandwidth_observer_ RTC_GUARDED_BY(mutex_);
+};
+
+int32_t ChannelSend::SendData(AudioFrameType frameType,
+ uint8_t payloadType,
+ uint32_t rtp_timestamp,
+ const uint8_t* payloadData,
+ size_t payloadSize,
+ int64_t absolute_capture_timestamp_ms) {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ rtc::ArrayView<const uint8_t> payload(payloadData, payloadSize);
+ if (frame_transformer_delegate_) {
+ // Asynchronously transform the payload before sending it. After the payload
+ // is transformed, the delegate will call SendRtpAudio to send it.
+ frame_transformer_delegate_->Transform(
+ frameType, payloadType, rtp_timestamp, rtp_rtcp_->StartTimestamp(),
+ payloadData, payloadSize, absolute_capture_timestamp_ms,
+ rtp_rtcp_->SSRC());
+ return 0;
+ }
+ return SendRtpAudio(frameType, payloadType, rtp_timestamp, payload,
+ absolute_capture_timestamp_ms);
+}
+
+int32_t ChannelSend::SendRtpAudio(AudioFrameType frameType,
+ uint8_t payloadType,
+ uint32_t rtp_timestamp,
+ rtc::ArrayView<const uint8_t> payload,
+ int64_t absolute_capture_timestamp_ms) {
+ if (include_audio_level_indication_.load()) {
+ // Store current audio level in the RTP sender.
+ // The level will be used in combination with voice-activity state
+ // (frameType) to add an RTP header extension
+ rtp_sender_audio_->SetAudioLevel(rms_level_.Average());
+ }
+
+ // E2EE Custom Audio Frame Encryption (This is optional).
+ // Keep this buffer around for the lifetime of the send call.
+ rtc::Buffer encrypted_audio_payload;
+ // We don't invoke encryptor if payload is empty, which means we are to send
+ // DTMF, or the encoder entered DTX.
+ // TODO(minyue): see whether DTMF packets should be encrypted or not. In
+ // current implementation, they are not.
+ if (!payload.empty()) {
+ if (frame_encryptor_ != nullptr) {
+ // TODO(benwright@webrtc.org) - Allocate enough to always encrypt inline.
+ // Allocate a buffer to hold the maximum possible encrypted payload.
+ size_t max_ciphertext_size = frame_encryptor_->GetMaxCiphertextByteSize(
+ cricket::MEDIA_TYPE_AUDIO, payload.size());
+ encrypted_audio_payload.SetSize(max_ciphertext_size);
+
+ // Encrypt the audio payload into the buffer.
+ size_t bytes_written = 0;
+ int encrypt_status = frame_encryptor_->Encrypt(
+ cricket::MEDIA_TYPE_AUDIO, rtp_rtcp_->SSRC(),
+ /*additional_data=*/nullptr, payload, encrypted_audio_payload,
+ &bytes_written);
+ if (encrypt_status != 0) {
+ RTC_DLOG(LS_ERROR)
+ << "Channel::SendData() failed encrypt audio payload: "
+ << encrypt_status;
+ return -1;
+ }
+ // Resize the buffer to the exact number of bytes actually used.
+ encrypted_audio_payload.SetSize(bytes_written);
+ // Rewrite the payloadData and size to the new encrypted payload.
+ payload = encrypted_audio_payload;
+ } else if (crypto_options_.sframe.require_frame_encryption) {
+ RTC_DLOG(LS_ERROR) << "Channel::SendData() failed sending audio payload: "
+ "A frame encryptor is required but one is not set.";
+ return -1;
+ }
+ }
+
+ // Push data from ACM to RTP/RTCP-module to deliver audio frame for
+ // packetization.
+ if (!rtp_rtcp_->OnSendingRtpFrame(rtp_timestamp,
+ // Leaving the time when this frame was
+ // received from the capture device as
+ // undefined for voice for now.
+ -1, payloadType,
+ /*force_sender_report=*/false)) {
+ return -1;
+ }
+
+ // RTCPSender has it's own copy of the timestamp offset, added in
+ // RTCPSender::BuildSR, hence we must not add the in the offset for the above
+ // call.
+ // TODO(nisse): Delete RTCPSender:timestamp_offset_, and see if we can confine
+ // knowledge of the offset to a single place.
+
+ // This call will trigger Transport::SendPacket() from the RTP/RTCP module.
+ if (!rtp_sender_audio_->SendAudio(
+ frameType, payloadType, rtp_timestamp + rtp_rtcp_->StartTimestamp(),
+ payload.data(), payload.size(), absolute_capture_timestamp_ms)) {
+ RTC_DLOG(LS_ERROR)
+ << "ChannelSend::SendData() failed to send data to RTP/RTCP module";
+ return -1;
+ }
+
+ return 0;
+}
+
+ChannelSend::ChannelSend(
+ Clock* clock,
+ TaskQueueFactory* task_queue_factory,
+ Transport* rtp_transport,
+ RtcpRttStats* rtcp_rtt_stats,
+ RtcEventLog* rtc_event_log,
+ FrameEncryptorInterface* frame_encryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ bool extmap_allow_mixed,
+ int rtcp_report_interval_ms,
+ uint32_t ssrc,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ TransportFeedbackObserver* feedback_observer,
+ const FieldTrialsView& field_trials)
+ : ssrc_(ssrc),
+ event_log_(rtc_event_log),
+ rtcp_observer_(new VoERtcpObserver(this)),
+ rtcp_counter_observer_(new RtcpCounterObserver(ssrc)),
+ feedback_observer_(feedback_observer),
+ rtp_packet_pacer_proxy_(new RtpPacketSenderProxy()),
+ retransmission_rate_limiter_(
+ new RateLimiter(clock, kMaxRetransmissionWindowMs)),
+ frame_encryptor_(frame_encryptor),
+ crypto_options_(crypto_options),
+ encoder_queue_(task_queue_factory->CreateTaskQueue(
+ "AudioEncoder",
+ TaskQueueFactory::Priority::NORMAL)) {
+ audio_coding_.reset(AudioCodingModule::Create(AudioCodingModule::Config()));
+
+ RtpRtcpInterface::Configuration configuration;
+ configuration.bandwidth_callback = rtcp_observer_.get();
+ configuration.transport_feedback_callback = feedback_observer_;
+ configuration.clock = clock;
+ configuration.audio = true;
+ configuration.outgoing_transport = rtp_transport;
+
+ configuration.paced_sender = rtp_packet_pacer_proxy_.get();
+
+ configuration.event_log = event_log_;
+ configuration.rtt_stats = rtcp_rtt_stats;
+ configuration.rtcp_packet_type_counter_observer =
+ rtcp_counter_observer_.get();
+ configuration.retransmission_rate_limiter =
+ retransmission_rate_limiter_.get();
+ configuration.extmap_allow_mixed = extmap_allow_mixed;
+ configuration.rtcp_report_interval_ms = rtcp_report_interval_ms;
+ configuration.rtcp_packet_type_counter_observer = this;
+
+ configuration.local_media_ssrc = ssrc;
+
+ rtp_rtcp_ = ModuleRtpRtcpImpl2::Create(configuration);
+ rtp_rtcp_->SetSendingMediaStatus(false);
+
+ rtp_sender_audio_ = std::make_unique<RTPSenderAudio>(configuration.clock,
+ rtp_rtcp_->RtpSender());
+
+ // Ensure that RTCP is enabled by default for the created channel.
+ rtp_rtcp_->SetRTCPStatus(RtcpMode::kCompound);
+
+ int error = audio_coding_->RegisterTransportCallback(this);
+ RTC_DCHECK_EQ(0, error);
+ if (frame_transformer)
+ InitFrameTransformerDelegate(std::move(frame_transformer));
+}
+
+ChannelSend::~ChannelSend() {
+ RTC_DCHECK(construction_thread_.IsCurrent());
+
+ // Resets the delegate's callback to ChannelSend::SendRtpAudio.
+ if (frame_transformer_delegate_)
+ frame_transformer_delegate_->Reset();
+
+ StopSend();
+ int error = audio_coding_->RegisterTransportCallback(NULL);
+ RTC_DCHECK_EQ(0, error);
+}
+
+void ChannelSend::StartSend() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK(!sending_);
+ sending_ = true;
+
+ RTC_DCHECK(packet_router_);
+ packet_router_->AddSendRtpModule(rtp_rtcp_.get(), /*remb_candidate=*/false);
+ rtp_rtcp_->SetSendingMediaStatus(true);
+ int ret = rtp_rtcp_->SetSendingStatus(true);
+ RTC_DCHECK_EQ(0, ret);
+
+ // It is now OK to start processing on the encoder task queue.
+ encoder_queue_is_active_.store(true);
+}
+
+void ChannelSend::StopSend() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!sending_) {
+ return;
+ }
+ sending_ = false;
+ encoder_queue_is_active_.store(false);
+
+ // Wait until all pending encode tasks are executed and clear any remaining
+ // buffers in the encoder.
+ rtc::Event flush;
+ encoder_queue_.PostTask([this, &flush]() {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ CallEncoder([](AudioEncoder* encoder) { encoder->Reset(); });
+ flush.Set();
+ });
+ flush.Wait(rtc::Event::kForever);
+
+ // Reset sending SSRC and sequence number and triggers direct transmission
+ // of RTCP BYE
+ if (rtp_rtcp_->SetSendingStatus(false) == -1) {
+ RTC_DLOG(LS_ERROR) << "StartSend() RTP/RTCP failed to stop sending";
+ }
+ rtp_rtcp_->SetSendingMediaStatus(false);
+
+ RTC_DCHECK(packet_router_);
+ packet_router_->RemoveSendRtpModule(rtp_rtcp_.get());
+ rtp_packet_pacer_proxy_->RemovePacketsForSsrc(rtp_rtcp_->SSRC());
+}
+
+void ChannelSend::SetEncoder(int payload_type,
+ std::unique_ptr<AudioEncoder> encoder) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK_GE(payload_type, 0);
+ RTC_DCHECK_LE(payload_type, 127);
+
+ // The RTP/RTCP module needs to know the RTP timestamp rate (i.e. clockrate)
+ // as well as some other things, so we collect this info and send it along.
+ rtp_rtcp_->RegisterSendPayloadFrequency(payload_type,
+ encoder->RtpTimestampRateHz());
+ rtp_sender_audio_->RegisterAudioPayload("audio", payload_type,
+ encoder->RtpTimestampRateHz(),
+ encoder->NumChannels(), 0);
+
+ audio_coding_->SetEncoder(std::move(encoder));
+}
+
+void ChannelSend::ModifyEncoder(
+ rtc::FunctionView<void(std::unique_ptr<AudioEncoder>*)> modifier) {
+ // This method can be called on the worker thread, module process thread
+ // or network thread. Audio coding is thread safe, so we do not need to
+ // enforce the calling thread.
+ audio_coding_->ModifyEncoder(modifier);
+}
+
+void ChannelSend::CallEncoder(rtc::FunctionView<void(AudioEncoder*)> modifier) {
+ ModifyEncoder([modifier](std::unique_ptr<AudioEncoder>* encoder_ptr) {
+ if (*encoder_ptr) {
+ modifier(encoder_ptr->get());
+ } else {
+ RTC_DLOG(LS_WARNING) << "Trying to call unset encoder.";
+ }
+ });
+}
+
+void ChannelSend::OnBitrateAllocation(BitrateAllocationUpdate update) {
+ // This method can be called on the worker thread, module process thread
+ // or on a TaskQueue via VideoSendStreamImpl::OnEncoderConfigurationChanged.
+ // TODO(solenberg): Figure out a good way to check this or enforce calling
+ // rules.
+ // RTC_DCHECK(worker_thread_checker_.IsCurrent() ||
+ // module_process_thread_checker_.IsCurrent());
+ CallEncoder([&](AudioEncoder* encoder) {
+ encoder->OnReceivedUplinkAllocation(update);
+ });
+ retransmission_rate_limiter_->SetMaxRate(update.target_bitrate.bps());
+}
+
+int ChannelSend::GetTargetBitrate() const {
+ return audio_coding_->GetTargetBitrate();
+}
+
+void ChannelSend::OnUplinkPacketLossRate(float packet_loss_rate) {
+ CallEncoder([&](AudioEncoder* encoder) {
+ encoder->OnReceivedUplinkPacketLossFraction(packet_loss_rate);
+ });
+}
+
+void ChannelSend::ReceivedRTCPPacket(const uint8_t* data, size_t length) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+
+ // Deliver RTCP packet to RTP/RTCP module for parsing
+ rtp_rtcp_->IncomingRtcpPacket(data, length);
+
+ int64_t rtt = GetRTT();
+ if (rtt == 0) {
+ // Waiting for valid RTT.
+ return;
+ }
+
+ int64_t nack_window_ms = rtt;
+ if (nack_window_ms < kMinRetransmissionWindowMs) {
+ nack_window_ms = kMinRetransmissionWindowMs;
+ } else if (nack_window_ms > kMaxRetransmissionWindowMs) {
+ nack_window_ms = kMaxRetransmissionWindowMs;
+ }
+ retransmission_rate_limiter_->SetWindowSize(nack_window_ms);
+
+ OnReceivedRtt(rtt);
+}
+
+void ChannelSend::SetInputMute(bool enable) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ MutexLock lock(&volume_settings_mutex_);
+ input_mute_ = enable;
+}
+
+bool ChannelSend::InputMute() const {
+ MutexLock lock(&volume_settings_mutex_);
+ return input_mute_;
+}
+
+bool ChannelSend::SendTelephoneEventOutband(int event, int duration_ms) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK_LE(0, event);
+ RTC_DCHECK_GE(255, event);
+ RTC_DCHECK_LE(0, duration_ms);
+ RTC_DCHECK_GE(65535, duration_ms);
+ if (!sending_) {
+ return false;
+ }
+ if (rtp_sender_audio_->SendTelephoneEvent(
+ event, duration_ms, kTelephoneEventAttenuationdB) != 0) {
+ RTC_DLOG(LS_ERROR) << "SendTelephoneEvent() failed to send event";
+ return false;
+ }
+ return true;
+}
+
+void ChannelSend::RegisterCngPayloadType(int payload_type,
+ int payload_frequency) {
+ rtp_rtcp_->RegisterSendPayloadFrequency(payload_type, payload_frequency);
+ rtp_sender_audio_->RegisterAudioPayload("CN", payload_type, payload_frequency,
+ 1, 0);
+}
+
+void ChannelSend::SetSendTelephoneEventPayloadType(int payload_type,
+ int payload_frequency) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK_LE(0, payload_type);
+ RTC_DCHECK_GE(127, payload_type);
+ rtp_rtcp_->RegisterSendPayloadFrequency(payload_type, payload_frequency);
+ rtp_sender_audio_->RegisterAudioPayload("telephone-event", payload_type,
+ payload_frequency, 0, 0);
+}
+
+void ChannelSend::SetSendAudioLevelIndicationStatus(bool enable, int id) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ include_audio_level_indication_.store(enable);
+ if (enable) {
+ rtp_rtcp_->RegisterRtpHeaderExtension(webrtc::AudioLevel::Uri(), id);
+ } else {
+ rtp_rtcp_->DeregisterSendRtpHeaderExtension(webrtc::AudioLevel::Uri());
+ }
+}
+
+void ChannelSend::RegisterSenderCongestionControlObjects(
+ RtpTransportControllerSendInterface* transport,
+ RtcpBandwidthObserver* bandwidth_observer) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RtpPacketSender* rtp_packet_pacer = transport->packet_sender();
+ PacketRouter* packet_router = transport->packet_router();
+
+ RTC_DCHECK(rtp_packet_pacer);
+ RTC_DCHECK(packet_router);
+ RTC_DCHECK(!packet_router_);
+ rtcp_observer_->SetBandwidthObserver(bandwidth_observer);
+ rtp_packet_pacer_proxy_->SetPacketPacer(rtp_packet_pacer);
+ rtp_rtcp_->SetStorePacketsStatus(true, 600);
+ packet_router_ = packet_router;
+}
+
+void ChannelSend::ResetSenderCongestionControlObjects() {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ RTC_DCHECK(packet_router_);
+ rtp_rtcp_->SetStorePacketsStatus(false, 600);
+ rtcp_observer_->SetBandwidthObserver(nullptr);
+ packet_router_ = nullptr;
+ rtp_packet_pacer_proxy_->SetPacketPacer(nullptr);
+}
+
+void ChannelSend::SetRTCP_CNAME(absl::string_view c_name) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // Note: SetCNAME() accepts a c string of length at most 255.
+ const std::string c_name_limited(c_name.substr(0, 255));
+ int ret = rtp_rtcp_->SetCNAME(c_name_limited.c_str()) != 0;
+ RTC_DCHECK_EQ(0, ret) << "SetRTCP_CNAME() failed to set RTCP CNAME";
+}
+
+std::vector<ReportBlock> ChannelSend::GetRemoteRTCPReportBlocks() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ // Get the report blocks from the latest received RTCP Sender or Receiver
+ // Report. Each element in the vector contains the sender's SSRC and a
+ // report block according to RFC 3550.
+ std::vector<ReportBlock> report_blocks;
+ for (const ReportBlockData& data : rtp_rtcp_->GetLatestReportBlockData()) {
+ ReportBlock report_block;
+ report_block.sender_SSRC = data.report_block().sender_ssrc;
+ report_block.source_SSRC = data.report_block().source_ssrc;
+ report_block.fraction_lost = data.report_block().fraction_lost;
+ report_block.cumulative_num_packets_lost = data.report_block().packets_lost;
+ report_block.extended_highest_sequence_number =
+ data.report_block().extended_highest_sequence_number;
+ report_block.interarrival_jitter = data.report_block().jitter;
+ report_block.last_SR_timestamp =
+ data.report_block().last_sender_report_timestamp;
+ report_block.delay_since_last_SR =
+ data.report_block().delay_since_last_sender_report;
+ report_blocks.push_back(report_block);
+ }
+ return report_blocks;
+}
+
+CallSendStatistics ChannelSend::GetRTCPStatistics() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ CallSendStatistics stats = {0};
+ stats.rttMs = GetRTT();
+ stats.rtcp_packet_type_counts = rtcp_counter_observer_->GetCounts();
+
+ StreamDataCounters rtp_stats;
+ StreamDataCounters rtx_stats;
+ rtp_rtcp_->GetSendStreamDataCounters(&rtp_stats, &rtx_stats);
+ stats.payload_bytes_sent =
+ rtp_stats.transmitted.payload_bytes + rtx_stats.transmitted.payload_bytes;
+ stats.header_and_padding_bytes_sent =
+ rtp_stats.transmitted.padding_bytes + rtp_stats.transmitted.header_bytes +
+ rtx_stats.transmitted.padding_bytes + rtx_stats.transmitted.header_bytes;
+
+ // TODO(https://crbug.com/webrtc/10555): RTX retransmissions should show up in
+ // separate outbound-rtp stream objects.
+ stats.retransmitted_bytes_sent = rtp_stats.retransmitted.payload_bytes;
+ stats.packetsSent =
+ rtp_stats.transmitted.packets + rtx_stats.transmitted.packets;
+ stats.total_packet_send_delay = rtp_stats.transmitted.total_packet_delay;
+ stats.retransmitted_packets_sent = rtp_stats.retransmitted.packets;
+ stats.report_block_datas = rtp_rtcp_->GetLatestReportBlockData();
+
+ {
+ MutexLock lock(&rtcp_counter_mutex_);
+ stats.nacks_rcvd = rtcp_packet_type_counter_.nack_packets;
+ }
+
+ return stats;
+}
+
+void ChannelSend::RtcpPacketTypesCounterUpdated(
+ uint32_t ssrc,
+ const RtcpPacketTypeCounter& packet_counter) {
+ if (ssrc != ssrc_) {
+ return;
+ }
+ MutexLock lock(&rtcp_counter_mutex_);
+ rtcp_packet_type_counter_ = packet_counter;
+}
+
+void ChannelSend::ProcessAndEncodeAudio(
+ std::unique_ptr<AudioFrame> audio_frame) {
+ TRACE_EVENT0("webrtc", "ChannelSend::ProcessAndEncodeAudio");
+
+ RTC_DCHECK_RUNS_SERIALIZED(&audio_thread_race_checker_);
+ RTC_DCHECK_GT(audio_frame->samples_per_channel_, 0);
+ RTC_DCHECK_LE(audio_frame->num_channels_, 8);
+
+ audio_frame->timestamp_ = timestamp_;
+ timestamp_ += audio_frame->samples_per_channel_;
+ if (!encoder_queue_is_active_.load()) {
+ return;
+ }
+
+ // Profile time between when the audio frame is added to the task queue and
+ // when the task is actually executed.
+ audio_frame->UpdateProfileTimeStamp();
+ encoder_queue_.PostTask(
+ [this, audio_frame = std::move(audio_frame)]() mutable {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ if (!encoder_queue_is_active_.load()) {
+ return;
+ }
+ // Measure time between when the audio frame is added to the task queue
+ // and when the task is actually executed. Goal is to keep track of
+ // unwanted extra latency added by the task queue.
+ RTC_HISTOGRAM_COUNTS_10000("WebRTC.Audio.EncodingTaskQueueLatencyMs",
+ audio_frame->ElapsedProfileTimeMs());
+
+ bool is_muted = InputMute();
+ AudioFrameOperations::Mute(audio_frame.get(), previous_frame_muted_,
+ is_muted);
+
+ if (include_audio_level_indication_.load()) {
+ size_t length =
+ audio_frame->samples_per_channel_ * audio_frame->num_channels_;
+ RTC_CHECK_LE(length, AudioFrame::kMaxDataSizeBytes);
+ if (is_muted && previous_frame_muted_) {
+ rms_level_.AnalyzeMuted(length);
+ } else {
+ rms_level_.Analyze(
+ rtc::ArrayView<const int16_t>(audio_frame->data(), length));
+ }
+ }
+ previous_frame_muted_ = is_muted;
+
+ // This call will trigger AudioPacketizationCallback::SendData if
+ // encoding is done and payload is ready for packetization and
+ // transmission. Otherwise, it will return without invoking the
+ // callback.
+ if (audio_coding_->Add10MsData(*audio_frame) < 0) {
+ RTC_DLOG(LS_ERROR) << "ACM::Add10MsData() failed.";
+ return;
+ }
+ });
+}
+
+ANAStats ChannelSend::GetANAStatistics() const {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ return audio_coding_->GetANAStats();
+}
+
+RtpRtcpInterface* ChannelSend::GetRtpRtcp() const {
+ return rtp_rtcp_.get();
+}
+
+int64_t ChannelSend::GetRTT() const {
+ std::vector<ReportBlockData> report_blocks =
+ rtp_rtcp_->GetLatestReportBlockData();
+ if (report_blocks.empty()) {
+ return 0;
+ }
+
+ // We don't know in advance the remote ssrc used by the other end's receiver
+ // reports, so use the first report block for the RTT.
+ return report_blocks.front().last_rtt_ms();
+}
+
+void ChannelSend::SetFrameEncryptor(
+ rtc::scoped_refptr<FrameEncryptorInterface> frame_encryptor) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ encoder_queue_.PostTask([this, frame_encryptor]() mutable {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ frame_encryptor_ = std::move(frame_encryptor);
+ });
+}
+
+void ChannelSend::SetEncoderToPacketizerFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
+ RTC_DCHECK_RUN_ON(&worker_thread_checker_);
+ if (!frame_transformer)
+ return;
+
+ encoder_queue_.PostTask(
+ [this, frame_transformer = std::move(frame_transformer)]() mutable {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ InitFrameTransformerDelegate(std::move(frame_transformer));
+ });
+}
+
+void ChannelSend::OnReceivedRtt(int64_t rtt_ms) {
+ // Invoke audio encoders OnReceivedRtt().
+ CallEncoder(
+ [rtt_ms](AudioEncoder* encoder) { encoder->OnReceivedRtt(rtt_ms); });
+}
+
+void ChannelSend::InitFrameTransformerDelegate(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer) {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ RTC_DCHECK(frame_transformer);
+ RTC_DCHECK(!frame_transformer_delegate_);
+
+ // Pass a callback to ChannelSend::SendRtpAudio, to be called by the delegate
+ // to send the transformed audio.
+ ChannelSendFrameTransformerDelegate::SendFrameCallback send_audio_callback =
+ [this](AudioFrameType frameType, uint8_t payloadType,
+ uint32_t rtp_timestamp, rtc::ArrayView<const uint8_t> payload,
+ int64_t absolute_capture_timestamp_ms) {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ return SendRtpAudio(frameType, payloadType, rtp_timestamp, payload,
+ absolute_capture_timestamp_ms);
+ };
+ frame_transformer_delegate_ =
+ rtc::make_ref_counted<ChannelSendFrameTransformerDelegate>(
+ std::move(send_audio_callback), std::move(frame_transformer),
+ &encoder_queue_);
+ frame_transformer_delegate_->Init();
+}
+
+} // namespace
+
+std::unique_ptr<ChannelSendInterface> CreateChannelSend(
+ Clock* clock,
+ TaskQueueFactory* task_queue_factory,
+ Transport* rtp_transport,
+ RtcpRttStats* rtcp_rtt_stats,
+ RtcEventLog* rtc_event_log,
+ FrameEncryptorInterface* frame_encryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ bool extmap_allow_mixed,
+ int rtcp_report_interval_ms,
+ uint32_t ssrc,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ TransportFeedbackObserver* feedback_observer,
+ const FieldTrialsView& field_trials) {
+ return std::make_unique<ChannelSend>(
+ clock, task_queue_factory, rtp_transport, rtcp_rtt_stats, rtc_event_log,
+ frame_encryptor, crypto_options, extmap_allow_mixed,
+ rtcp_report_interval_ms, ssrc, std::move(frame_transformer),
+ feedback_observer, field_trials);
+}
+
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_send.h b/third_party/libwebrtc/audio/channel_send.h
new file mode 100644
index 0000000000..9b3969161c
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_send.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_CHANNEL_SEND_H_
+#define AUDIO_CHANNEL_SEND_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "api/audio/audio_frame.h"
+#include "api/audio_codecs/audio_encoder.h"
+#include "api/crypto/crypto_options.h"
+#include "api/field_trials_view.h"
+#include "api/frame_transformer_interface.h"
+#include "api/function_view.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "modules/rtp_rtcp/include/report_block_data.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_interface.h"
+#include "modules/rtp_rtcp/source/rtp_sender_audio.h"
+
+namespace webrtc {
+
+class FrameEncryptorInterface;
+class RtcEventLog;
+class RtpTransportControllerSendInterface;
+
+struct CallSendStatistics {
+ int64_t rttMs;
+ int64_t payload_bytes_sent;
+ int64_t header_and_padding_bytes_sent;
+ // https://w3c.github.io/webrtc-stats/#dom-rtcoutboundrtpstreamstats-retransmittedbytessent
+ uint64_t retransmitted_bytes_sent;
+ int packetsSent;
+ // https://w3c.github.io/webrtc-stats/#dom-rtcoutboundrtpstreamstats-totalpacketsenddelay
+ TimeDelta total_packet_send_delay = TimeDelta::Zero();
+ // https://w3c.github.io/webrtc-stats/#dom-rtcoutboundrtpstreamstats-retransmittedpacketssent
+ uint64_t retransmitted_packets_sent;
+ RtcpPacketTypeCounter rtcp_packet_type_counts;
+ // A snapshot of Report Blocks with additional data of interest to statistics.
+ // Within this list, the sender-source SSRC pair is unique and per-pair the
+ // ReportBlockData represents the latest Report Block that was received for
+ // that pair.
+ std::vector<ReportBlockData> report_block_datas;
+ uint32_t nacks_rcvd;
+};
+
+// See section 6.4.2 in http://www.ietf.org/rfc/rfc3550.txt for details.
+struct ReportBlock {
+ uint32_t sender_SSRC; // SSRC of sender
+ uint32_t source_SSRC;
+ uint8_t fraction_lost;
+ int32_t cumulative_num_packets_lost;
+ uint32_t extended_highest_sequence_number;
+ uint32_t interarrival_jitter;
+ uint32_t last_SR_timestamp;
+ uint32_t delay_since_last_SR;
+};
+
+namespace voe {
+
+class ChannelSendInterface {
+ public:
+ virtual ~ChannelSendInterface() = default;
+
+ virtual void ReceivedRTCPPacket(const uint8_t* packet, size_t length) = 0;
+
+ virtual CallSendStatistics GetRTCPStatistics() const = 0;
+
+ virtual void SetEncoder(int payload_type,
+ std::unique_ptr<AudioEncoder> encoder) = 0;
+ virtual void ModifyEncoder(
+ rtc::FunctionView<void(std::unique_ptr<AudioEncoder>*)> modifier) = 0;
+ virtual void CallEncoder(rtc::FunctionView<void(AudioEncoder*)> modifier) = 0;
+
+ // Use 0 to indicate that the extension should not be registered.
+ virtual void SetRTCP_CNAME(absl::string_view c_name) = 0;
+ virtual void SetSendAudioLevelIndicationStatus(bool enable, int id) = 0;
+ virtual void RegisterSenderCongestionControlObjects(
+ RtpTransportControllerSendInterface* transport,
+ RtcpBandwidthObserver* bandwidth_observer) = 0;
+ virtual void ResetSenderCongestionControlObjects() = 0;
+ virtual std::vector<ReportBlock> GetRemoteRTCPReportBlocks() const = 0;
+ virtual ANAStats GetANAStatistics() const = 0;
+ virtual void RegisterCngPayloadType(int payload_type,
+ int payload_frequency) = 0;
+ virtual void SetSendTelephoneEventPayloadType(int payload_type,
+ int payload_frequency) = 0;
+ virtual bool SendTelephoneEventOutband(int event, int duration_ms) = 0;
+ virtual void OnBitrateAllocation(BitrateAllocationUpdate update) = 0;
+ virtual int GetTargetBitrate() const = 0;
+ virtual void SetInputMute(bool muted) = 0;
+
+ virtual void ProcessAndEncodeAudio(
+ std::unique_ptr<AudioFrame> audio_frame) = 0;
+ virtual RtpRtcpInterface* GetRtpRtcp() const = 0;
+
+ // In RTP we currently rely on RTCP packets (`ReceivedRTCPPacket`) to inform
+ // about RTT.
+ // In media transport we rely on the TargetTransferRateObserver instead.
+ // In other words, if you are using RTP, you should expect
+ // `ReceivedRTCPPacket` to be called, if you are using media transport,
+ // `OnTargetTransferRate` will be called.
+ //
+ // In future, RTP media will move to the media transport implementation and
+ // these conditions will be removed.
+ // Returns the RTT in milliseconds.
+ virtual int64_t GetRTT() const = 0;
+ virtual void StartSend() = 0;
+ virtual void StopSend() = 0;
+
+ // E2EE Custom Audio Frame Encryption (Optional)
+ virtual void SetFrameEncryptor(
+ rtc::scoped_refptr<FrameEncryptorInterface> frame_encryptor) = 0;
+
+ // Sets a frame transformer between encoder and packetizer, to transform
+ // encoded frames before sending them out the network.
+ virtual void SetEncoderToPacketizerFrameTransformer(
+ rtc::scoped_refptr<webrtc::FrameTransformerInterface>
+ frame_transformer) = 0;
+};
+
+std::unique_ptr<ChannelSendInterface> CreateChannelSend(
+ Clock* clock,
+ TaskQueueFactory* task_queue_factory,
+ Transport* rtp_transport,
+ RtcpRttStats* rtcp_rtt_stats,
+ RtcEventLog* rtc_event_log,
+ FrameEncryptorInterface* frame_encryptor,
+ const webrtc::CryptoOptions& crypto_options,
+ bool extmap_allow_mixed,
+ int rtcp_report_interval_ms,
+ uint32_t ssrc,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ TransportFeedbackObserver* feedback_observer,
+ const FieldTrialsView& field_trials);
+
+} // namespace voe
+} // namespace webrtc
+
+#endif // AUDIO_CHANNEL_SEND_H_
diff --git a/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.cc b/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.cc
new file mode 100644
index 0000000000..29bb0b81d8
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.cc
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_send_frame_transformer_delegate.h"
+
+#include <utility>
+
+namespace webrtc {
+namespace {
+
+class TransformableOutgoingAudioFrame : public TransformableFrameInterface {
+ public:
+ TransformableOutgoingAudioFrame(AudioFrameType frame_type,
+ uint8_t payload_type,
+ uint32_t rtp_timestamp,
+ uint32_t rtp_start_timestamp,
+ const uint8_t* payload_data,
+ size_t payload_size,
+ int64_t absolute_capture_timestamp_ms,
+ uint32_t ssrc)
+ : frame_type_(frame_type),
+ payload_type_(payload_type),
+ rtp_timestamp_(rtp_timestamp),
+ rtp_start_timestamp_(rtp_start_timestamp),
+ payload_(payload_data, payload_size),
+ absolute_capture_timestamp_ms_(absolute_capture_timestamp_ms),
+ ssrc_(ssrc) {}
+ ~TransformableOutgoingAudioFrame() override = default;
+ rtc::ArrayView<const uint8_t> GetData() const override { return payload_; }
+ void SetData(rtc::ArrayView<const uint8_t> data) override {
+ payload_.SetData(data.data(), data.size());
+ }
+ uint32_t GetTimestamp() const override {
+ return rtp_timestamp_ + rtp_start_timestamp_;
+ }
+ uint32_t GetStartTimestamp() const { return rtp_start_timestamp_; }
+ uint32_t GetSsrc() const override { return ssrc_; }
+
+ AudioFrameType GetFrameType() const { return frame_type_; }
+ uint8_t GetPayloadType() const override { return payload_type_; }
+ int64_t GetAbsoluteCaptureTimestampMs() const {
+ return absolute_capture_timestamp_ms_;
+ }
+ Direction GetDirection() const override { return Direction::kSender; }
+
+ private:
+ AudioFrameType frame_type_;
+ uint8_t payload_type_;
+ uint32_t rtp_timestamp_;
+ uint32_t rtp_start_timestamp_;
+ rtc::Buffer payload_;
+ int64_t absolute_capture_timestamp_ms_;
+ uint32_t ssrc_;
+};
+} // namespace
+
+ChannelSendFrameTransformerDelegate::ChannelSendFrameTransformerDelegate(
+ SendFrameCallback send_frame_callback,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ rtc::TaskQueue* encoder_queue)
+ : send_frame_callback_(send_frame_callback),
+ frame_transformer_(std::move(frame_transformer)),
+ encoder_queue_(encoder_queue) {}
+
+void ChannelSendFrameTransformerDelegate::Init() {
+ frame_transformer_->RegisterTransformedFrameCallback(
+ rtc::scoped_refptr<TransformedFrameCallback>(this));
+}
+
+void ChannelSendFrameTransformerDelegate::Reset() {
+ frame_transformer_->UnregisterTransformedFrameCallback();
+ frame_transformer_ = nullptr;
+
+ MutexLock lock(&send_lock_);
+ send_frame_callback_ = SendFrameCallback();
+}
+
+void ChannelSendFrameTransformerDelegate::Transform(
+ AudioFrameType frame_type,
+ uint8_t payload_type,
+ uint32_t rtp_timestamp,
+ uint32_t rtp_start_timestamp,
+ const uint8_t* payload_data,
+ size_t payload_size,
+ int64_t absolute_capture_timestamp_ms,
+ uint32_t ssrc) {
+ frame_transformer_->Transform(
+ std::make_unique<TransformableOutgoingAudioFrame>(
+ frame_type, payload_type, rtp_timestamp, rtp_start_timestamp,
+ payload_data, payload_size, absolute_capture_timestamp_ms, ssrc));
+}
+
+void ChannelSendFrameTransformerDelegate::OnTransformedFrame(
+ std::unique_ptr<TransformableFrameInterface> frame) {
+ MutexLock lock(&send_lock_);
+ if (!send_frame_callback_)
+ return;
+ rtc::scoped_refptr<ChannelSendFrameTransformerDelegate> delegate(this);
+ encoder_queue_->PostTask(
+ [delegate = std::move(delegate), frame = std::move(frame)]() mutable {
+ delegate->SendFrame(std::move(frame));
+ });
+}
+
+void ChannelSendFrameTransformerDelegate::SendFrame(
+ std::unique_ptr<TransformableFrameInterface> frame) const {
+ MutexLock lock(&send_lock_);
+ RTC_DCHECK_RUN_ON(encoder_queue_);
+ RTC_CHECK_EQ(frame->GetDirection(),
+ TransformableFrameInterface::Direction::kSender);
+ if (!send_frame_callback_)
+ return;
+ auto* transformed_frame =
+ static_cast<TransformableOutgoingAudioFrame*>(frame.get());
+ send_frame_callback_(transformed_frame->GetFrameType(),
+ transformed_frame->GetPayloadType(),
+ transformed_frame->GetTimestamp() -
+ transformed_frame->GetStartTimestamp(),
+ transformed_frame->GetData(),
+ transformed_frame->GetAbsoluteCaptureTimestampMs());
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.h b/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.h
new file mode 100644
index 0000000000..6d9f0a8613
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_CHANNEL_SEND_FRAME_TRANSFORMER_DELEGATE_H_
+#define AUDIO_CHANNEL_SEND_FRAME_TRANSFORMER_DELEGATE_H_
+
+#include <memory>
+
+#include "api/frame_transformer_interface.h"
+#include "api/sequence_checker.h"
+#include "modules/audio_coding/include/audio_coding_module_typedefs.h"
+#include "rtc_base/buffer.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/task_queue.h"
+
+namespace webrtc {
+
+// Delegates calls to FrameTransformerInterface to transform frames, and to
+// ChannelSend to send the transformed frames using `send_frame_callback_` on
+// the `encoder_queue_`.
+// OnTransformedFrame() can be called from any thread, the delegate ensures
+// thread-safe access to the ChannelSend callback.
+class ChannelSendFrameTransformerDelegate : public TransformedFrameCallback {
+ public:
+ using SendFrameCallback =
+ std::function<int32_t(AudioFrameType frameType,
+ uint8_t payloadType,
+ uint32_t rtp_timestamp,
+ rtc::ArrayView<const uint8_t> payload,
+ int64_t absolute_capture_timestamp_ms)>;
+ ChannelSendFrameTransformerDelegate(
+ SendFrameCallback send_frame_callback,
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
+ rtc::TaskQueue* encoder_queue);
+
+ // Registers `this` as callback for `frame_transformer_`, to get the
+ // transformed frames.
+ void Init();
+
+ // Unregisters and releases the `frame_transformer_` reference, and resets
+ // `send_frame_callback_` under lock. Called from ChannelSend destructor to
+ // prevent running the callback on a dangling channel.
+ void Reset();
+
+ // Delegates the call to FrameTransformerInterface::TransformFrame, to
+ // transform the frame asynchronously.
+ void Transform(AudioFrameType frame_type,
+ uint8_t payload_type,
+ uint32_t rtp_timestamp,
+ uint32_t rtp_start_timestamp,
+ const uint8_t* payload_data,
+ size_t payload_size,
+ int64_t absolute_capture_timestamp_ms,
+ uint32_t ssrc);
+
+ // Implements TransformedFrameCallback. Can be called on any thread.
+ void OnTransformedFrame(
+ std::unique_ptr<TransformableFrameInterface> frame) override;
+
+ // Delegates the call to ChannelSend::SendRtpAudio on the `encoder_queue_`,
+ // by calling `send_audio_callback_`.
+ void SendFrame(std::unique_ptr<TransformableFrameInterface> frame) const;
+
+ protected:
+ ~ChannelSendFrameTransformerDelegate() override = default;
+
+ private:
+ mutable Mutex send_lock_;
+ SendFrameCallback send_frame_callback_ RTC_GUARDED_BY(send_lock_);
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_;
+ rtc::TaskQueue* encoder_queue_ RTC_GUARDED_BY(send_lock_);
+};
+} // namespace webrtc
+#endif // AUDIO_CHANNEL_SEND_FRAME_TRANSFORMER_DELEGATE_H_
diff --git a/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate_unittest.cc b/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate_unittest.cc
new file mode 100644
index 0000000000..9196bcb41f
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_send_frame_transformer_delegate_unittest.cc
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_send_frame_transformer_delegate.h"
+
+#include <memory>
+#include <utility>
+
+#include "rtc_base/task_queue_for_test.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/mock_frame_transformer.h"
+#include "test/mock_transformable_frame.h"
+
+namespace webrtc {
+namespace {
+
+using ::testing::NiceMock;
+using ::testing::SaveArg;
+
+class MockChannelSend {
+ public:
+ MockChannelSend() = default;
+ ~MockChannelSend() = default;
+
+ MOCK_METHOD(int32_t,
+ SendFrame,
+ (AudioFrameType frameType,
+ uint8_t payloadType,
+ uint32_t rtp_timestamp,
+ rtc::ArrayView<const uint8_t> payload,
+ int64_t absolute_capture_timestamp_ms));
+
+ ChannelSendFrameTransformerDelegate::SendFrameCallback callback() {
+ return [this](AudioFrameType frameType, uint8_t payloadType,
+ uint32_t rtp_timestamp, rtc::ArrayView<const uint8_t> payload,
+ int64_t absolute_capture_timestamp_ms) {
+ return SendFrame(frameType, payloadType, rtp_timestamp, payload,
+ absolute_capture_timestamp_ms);
+ };
+ }
+};
+
+// Test that the delegate registers itself with the frame transformer on Init().
+TEST(ChannelSendFrameTransformerDelegateTest,
+ RegisterTransformedFrameCallbackOnInit) {
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<MockFrameTransformer>();
+ rtc::scoped_refptr<ChannelSendFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelSendFrameTransformerDelegate>(
+ ChannelSendFrameTransformerDelegate::SendFrameCallback(),
+ mock_frame_transformer, nullptr);
+ EXPECT_CALL(*mock_frame_transformer, RegisterTransformedFrameCallback);
+ delegate->Init();
+}
+
+// Test that the delegate unregisters itself from the frame transformer on
+// Reset().
+TEST(ChannelSendFrameTransformerDelegateTest,
+ UnregisterTransformedFrameCallbackOnReset) {
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<MockFrameTransformer>();
+ rtc::scoped_refptr<ChannelSendFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelSendFrameTransformerDelegate>(
+ ChannelSendFrameTransformerDelegate::SendFrameCallback(),
+ mock_frame_transformer, nullptr);
+ EXPECT_CALL(*mock_frame_transformer, UnregisterTransformedFrameCallback);
+ delegate->Reset();
+}
+
+// Test that when the delegate receives a transformed frame from the frame
+// transformer, it passes it to the channel using the SendFrameCallback.
+TEST(ChannelSendFrameTransformerDelegateTest,
+ TransformRunsChannelSendCallback) {
+ TaskQueueForTest channel_queue("channel_queue");
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<NiceMock<MockFrameTransformer>>();
+ MockChannelSend mock_channel;
+ rtc::scoped_refptr<ChannelSendFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelSendFrameTransformerDelegate>(
+ mock_channel.callback(), mock_frame_transformer, &channel_queue);
+ rtc::scoped_refptr<TransformedFrameCallback> callback;
+ EXPECT_CALL(*mock_frame_transformer, RegisterTransformedFrameCallback)
+ .WillOnce(SaveArg<0>(&callback));
+ delegate->Init();
+ ASSERT_TRUE(callback);
+
+ const uint8_t data[] = {1, 2, 3, 4};
+ EXPECT_CALL(mock_channel, SendFrame);
+ ON_CALL(*mock_frame_transformer, Transform)
+ .WillByDefault(
+ [&callback](std::unique_ptr<TransformableFrameInterface> frame) {
+ callback->OnTransformedFrame(std::move(frame));
+ });
+ delegate->Transform(AudioFrameType::kEmptyFrame, 0, 0, 0, data, sizeof(data),
+ 0, 0);
+ channel_queue.WaitForPreviouslyPostedTasks();
+}
+
+// Test that if the delegate receives a transformed frame after it has been
+// reset, it does not run the SendFrameCallback, as the channel is destroyed
+// after resetting the delegate.
+TEST(ChannelSendFrameTransformerDelegateTest,
+ OnTransformedDoesNotRunChannelSendCallbackAfterReset) {
+ TaskQueueForTest channel_queue("channel_queue");
+ rtc::scoped_refptr<MockFrameTransformer> mock_frame_transformer =
+ rtc::make_ref_counted<testing::NiceMock<MockFrameTransformer>>();
+ MockChannelSend mock_channel;
+ rtc::scoped_refptr<ChannelSendFrameTransformerDelegate> delegate =
+ rtc::make_ref_counted<ChannelSendFrameTransformerDelegate>(
+ mock_channel.callback(), mock_frame_transformer, &channel_queue);
+
+ delegate->Reset();
+ EXPECT_CALL(mock_channel, SendFrame).Times(0);
+ delegate->OnTransformedFrame(std::make_unique<MockTransformableFrame>());
+ channel_queue.WaitForPreviouslyPostedTasks();
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/channel_send_unittest.cc b/third_party/libwebrtc/audio/channel_send_unittest.cc
new file mode 100644
index 0000000000..50d8368d4a
--- /dev/null
+++ b/third_party/libwebrtc/audio/channel_send_unittest.cc
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2023 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/channel_send.h"
+
+#include <utility>
+
+#include "api/audio/audio_frame.h"
+#include "api/audio_codecs/builtin_audio_encoder_factory.h"
+#include "api/rtc_event_log/rtc_event_log.h"
+#include "api/scoped_refptr.h"
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+#include "call/rtp_transport_controller_send.h"
+#include "test/gtest.h"
+#include "test/mock_transport.h"
+#include "test/scoped_key_value_config.h"
+#include "test/time_controller/simulated_time_controller.h"
+
+namespace webrtc {
+namespace voe {
+namespace {
+
+constexpr int kRtcpIntervalMs = 1000;
+constexpr int kSsrc = 333;
+constexpr int kPayloadType = 1;
+
+BitrateConstraints GetBitrateConfig() {
+ BitrateConstraints bitrate_config;
+ bitrate_config.min_bitrate_bps = 10000;
+ bitrate_config.start_bitrate_bps = 100000;
+ bitrate_config.max_bitrate_bps = 1000000;
+ return bitrate_config;
+}
+
+std::unique_ptr<AudioFrame> CreateAudioFrame() {
+ auto frame = std::make_unique<AudioFrame>();
+ frame->samples_per_channel_ = 480;
+ frame->sample_rate_hz_ = 48000;
+ frame->num_channels_ = 1;
+ return frame;
+}
+
+class ChannelSendTest : public ::testing::Test {
+ protected:
+ ChannelSendTest()
+ : time_controller_(Timestamp::Seconds(1)),
+ transport_controller_(
+ time_controller_.GetClock(),
+ RtpTransportConfig{
+ .bitrate_config = GetBitrateConfig(),
+ .event_log = &event_log_,
+ .task_queue_factory = time_controller_.GetTaskQueueFactory(),
+ .trials = &field_trials_,
+ }) {
+ transport_controller_.EnsureStarted();
+ }
+
+ std::unique_ptr<ChannelSendInterface> CreateChannelSend() {
+ return voe::CreateChannelSend(
+ time_controller_.GetClock(), time_controller_.GetTaskQueueFactory(),
+ &transport_, nullptr, &event_log_, nullptr, crypto_options_, false,
+ kRtcpIntervalMs, kSsrc, nullptr, nullptr, field_trials_);
+ }
+
+ GlobalSimulatedTimeController time_controller_;
+ webrtc::test::ScopedKeyValueConfig field_trials_;
+ RtcEventLogNull event_log_;
+ MockTransport transport_;
+ RtpTransportControllerSend transport_controller_;
+ CryptoOptions crypto_options_;
+};
+
+TEST_F(ChannelSendTest, StopSendShouldResetEncoder) {
+ std::unique_ptr<ChannelSendInterface> channel = CreateChannelSend();
+ rtc::scoped_refptr<AudioEncoderFactory> encoder_factory =
+ CreateBuiltinAudioEncoderFactory();
+ std::unique_ptr<AudioEncoder> encoder = encoder_factory->MakeAudioEncoder(
+ kPayloadType, SdpAudioFormat("opus", 48000, 2), {});
+ channel->SetEncoder(kPayloadType, std::move(encoder));
+ channel->RegisterSenderCongestionControlObjects(&transport_controller_,
+ nullptr);
+ channel->StartSend();
+
+ // Insert two frames which should trigger a new packet.
+ EXPECT_CALL(transport_, SendRtp).Times(1);
+ channel->ProcessAndEncodeAudio(CreateAudioFrame());
+ time_controller_.AdvanceTime(webrtc::TimeDelta::Zero());
+ channel->ProcessAndEncodeAudio(CreateAudioFrame());
+ time_controller_.AdvanceTime(webrtc::TimeDelta::Zero());
+
+ EXPECT_CALL(transport_, SendRtp).Times(0);
+ channel->ProcessAndEncodeAudio(CreateAudioFrame());
+ time_controller_.AdvanceTime(webrtc::TimeDelta::Zero());
+ // StopSend should clear the previous audio frame stored in the encoder.
+ channel->StopSend();
+ channel->StartSend();
+ // The following frame should not trigger a new packet since the encoder
+ // needs 20 ms audio.
+ channel->ProcessAndEncodeAudio(CreateAudioFrame());
+ time_controller_.AdvanceTime(webrtc::TimeDelta::Zero());
+}
+
+} // namespace
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/conversion.h b/third_party/libwebrtc/audio/conversion.h
new file mode 100644
index 0000000000..dd71942f6a
--- /dev/null
+++ b/third_party/libwebrtc/audio/conversion.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_CONVERSION_H_
+#define AUDIO_CONVERSION_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+namespace webrtc {
+
+// Convert fixed point number with 8 bit fractional part, to floating point.
+inline float Q8ToFloat(uint32_t v) {
+ return static_cast<float>(v) / (1 << 8);
+}
+
+// Convert fixed point number with 14 bit fractional part, to floating point.
+inline float Q14ToFloat(uint32_t v) {
+ return static_cast<float>(v) / (1 << 14);
+}
+} // namespace webrtc
+
+#endif // AUDIO_CONVERSION_H_
diff --git a/third_party/libwebrtc/audio/mock_voe_channel_proxy.h b/third_party/libwebrtc/audio/mock_voe_channel_proxy.h
new file mode 100644
index 0000000000..a02bee38ad
--- /dev/null
+++ b/third_party/libwebrtc/audio/mock_voe_channel_proxy.h
@@ -0,0 +1,186 @@
+/*
+ * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_MOCK_VOE_CHANNEL_PROXY_H_
+#define AUDIO_MOCK_VOE_CHANNEL_PROXY_H_
+
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/crypto/frame_decryptor_interface.h"
+#include "api/test/mock_frame_encryptor.h"
+#include "audio/channel_receive.h"
+#include "audio/channel_send.h"
+#include "modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "test/gmock.h"
+
+namespace webrtc {
+namespace test {
+
+class MockChannelReceive : public voe::ChannelReceiveInterface {
+ public:
+ MOCK_METHOD(void, SetNACKStatus, (bool enable, int max_packets), (override));
+ MOCK_METHOD(void, SetNonSenderRttMeasurement, (bool enabled), (override));
+ MOCK_METHOD(void,
+ RegisterReceiverCongestionControlObjects,
+ (PacketRouter*),
+ (override));
+ MOCK_METHOD(void, ResetReceiverCongestionControlObjects, (), (override));
+ MOCK_METHOD(CallReceiveStatistics, GetRTCPStatistics, (), (const, override));
+ MOCK_METHOD(NetworkStatistics,
+ GetNetworkStatistics,
+ (bool),
+ (const, override));
+ MOCK_METHOD(AudioDecodingCallStats,
+ GetDecodingCallStatistics,
+ (),
+ (const, override));
+ MOCK_METHOD(int, GetSpeechOutputLevelFullRange, (), (const, override));
+ MOCK_METHOD(double, GetTotalOutputEnergy, (), (const, override));
+ MOCK_METHOD(double, GetTotalOutputDuration, (), (const, override));
+ MOCK_METHOD(uint32_t, GetDelayEstimate, (), (const, override));
+ MOCK_METHOD(void, SetSink, (AudioSinkInterface*), (override));
+ MOCK_METHOD(void, OnRtpPacket, (const RtpPacketReceived& packet), (override));
+ MOCK_METHOD(void,
+ ReceivedRTCPPacket,
+ (const uint8_t*, size_t length),
+ (override));
+ MOCK_METHOD(void, SetChannelOutputVolumeScaling, (float scaling), (override));
+ MOCK_METHOD(AudioMixer::Source::AudioFrameInfo,
+ GetAudioFrameWithInfo,
+ (int sample_rate_hz, AudioFrame*),
+ (override));
+ MOCK_METHOD(int, PreferredSampleRate, (), (const, override));
+ MOCK_METHOD(void, SetSourceTracker, (SourceTracker*), (override));
+ MOCK_METHOD(void,
+ SetAssociatedSendChannel,
+ (const voe::ChannelSendInterface*),
+ (override));
+ MOCK_METHOD(bool,
+ GetPlayoutRtpTimestamp,
+ (uint32_t*, int64_t*),
+ (const, override));
+ MOCK_METHOD(void,
+ SetEstimatedPlayoutNtpTimestampMs,
+ (int64_t ntp_timestamp_ms, int64_t time_ms),
+ (override));
+ MOCK_METHOD(absl::optional<int64_t>,
+ GetCurrentEstimatedPlayoutNtpTimestampMs,
+ (int64_t now_ms),
+ (const, override));
+ MOCK_METHOD(absl::optional<Syncable::Info>,
+ GetSyncInfo,
+ (),
+ (const, override));
+ MOCK_METHOD(bool, SetMinimumPlayoutDelay, (int delay_ms), (override));
+ MOCK_METHOD(bool, SetBaseMinimumPlayoutDelayMs, (int delay_ms), (override));
+ MOCK_METHOD(int, GetBaseMinimumPlayoutDelayMs, (), (const, override));
+ MOCK_METHOD((absl::optional<std::pair<int, SdpAudioFormat>>),
+ GetReceiveCodec,
+ (),
+ (const, override));
+ MOCK_METHOD(void,
+ SetReceiveCodecs,
+ ((const std::map<int, SdpAudioFormat>& codecs)),
+ (override));
+ MOCK_METHOD(void, StartPlayout, (), (override));
+ MOCK_METHOD(void, StopPlayout, (), (override));
+ MOCK_METHOD(
+ void,
+ SetDepacketizerToDecoderFrameTransformer,
+ (rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer),
+ (override));
+ MOCK_METHOD(
+ void,
+ SetFrameDecryptor,
+ (rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor),
+ (override));
+ MOCK_METHOD(void, OnLocalSsrcChange, (uint32_t local_ssrc), (override));
+ MOCK_METHOD(uint32_t, GetLocalSsrc, (), (const, override));
+};
+
+class MockChannelSend : public voe::ChannelSendInterface {
+ public:
+ MOCK_METHOD(void,
+ SetEncoder,
+ (int payload_type, std::unique_ptr<AudioEncoder> encoder),
+ (override));
+ MOCK_METHOD(
+ void,
+ ModifyEncoder,
+ (rtc::FunctionView<void(std::unique_ptr<AudioEncoder>*)> modifier),
+ (override));
+ MOCK_METHOD(void,
+ CallEncoder,
+ (rtc::FunctionView<void(AudioEncoder*)> modifier),
+ (override));
+ MOCK_METHOD(void, SetRTCP_CNAME, (absl::string_view c_name), (override));
+ MOCK_METHOD(void,
+ SetSendAudioLevelIndicationStatus,
+ (bool enable, int id),
+ (override));
+ MOCK_METHOD(void,
+ RegisterSenderCongestionControlObjects,
+ (RtpTransportControllerSendInterface*, RtcpBandwidthObserver*),
+ (override));
+ MOCK_METHOD(void, ResetSenderCongestionControlObjects, (), (override));
+ MOCK_METHOD(CallSendStatistics, GetRTCPStatistics, (), (const, override));
+ MOCK_METHOD(std::vector<ReportBlock>,
+ GetRemoteRTCPReportBlocks,
+ (),
+ (const, override));
+ MOCK_METHOD(ANAStats, GetANAStatistics, (), (const, override));
+ MOCK_METHOD(void,
+ RegisterCngPayloadType,
+ (int payload_type, int payload_frequency),
+ (override));
+ MOCK_METHOD(void,
+ SetSendTelephoneEventPayloadType,
+ (int payload_type, int payload_frequency),
+ (override));
+ MOCK_METHOD(bool,
+ SendTelephoneEventOutband,
+ (int event, int duration_ms),
+ (override));
+ MOCK_METHOD(void,
+ OnBitrateAllocation,
+ (BitrateAllocationUpdate update),
+ (override));
+ MOCK_METHOD(void, SetInputMute, (bool muted), (override));
+ MOCK_METHOD(void,
+ ReceivedRTCPPacket,
+ (const uint8_t*, size_t length),
+ (override));
+ MOCK_METHOD(void,
+ ProcessAndEncodeAudio,
+ (std::unique_ptr<AudioFrame>),
+ (override));
+ MOCK_METHOD(RtpRtcpInterface*, GetRtpRtcp, (), (const, override));
+ MOCK_METHOD(int, GetTargetBitrate, (), (const, override));
+ MOCK_METHOD(int64_t, GetRTT, (), (const, override));
+ MOCK_METHOD(void, StartSend, (), (override));
+ MOCK_METHOD(void, StopSend, (), (override));
+ MOCK_METHOD(void,
+ SetFrameEncryptor,
+ (rtc::scoped_refptr<FrameEncryptorInterface> frame_encryptor),
+ (override));
+ MOCK_METHOD(
+ void,
+ SetEncoderToPacketizerFrameTransformer,
+ (rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer),
+ (override));
+};
+} // namespace test
+} // namespace webrtc
+
+#endif // AUDIO_MOCK_VOE_CHANNEL_PROXY_H_
diff --git a/third_party/libwebrtc/audio/remix_resample.cc b/third_party/libwebrtc/audio/remix_resample.cc
new file mode 100644
index 0000000000..178af622a1
--- /dev/null
+++ b/third_party/libwebrtc/audio/remix_resample.cc
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/remix_resample.h"
+
+#include "api/audio/audio_frame.h"
+#include "audio/utility/audio_frame_operations.h"
+#include "common_audio/resampler/include/push_resampler.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+namespace voe {
+
+void RemixAndResample(const AudioFrame& src_frame,
+ PushResampler<int16_t>* resampler,
+ AudioFrame* dst_frame) {
+ RemixAndResample(src_frame.data(), src_frame.samples_per_channel_,
+ src_frame.num_channels_, src_frame.sample_rate_hz_,
+ resampler, dst_frame);
+ dst_frame->timestamp_ = src_frame.timestamp_;
+ dst_frame->elapsed_time_ms_ = src_frame.elapsed_time_ms_;
+ dst_frame->ntp_time_ms_ = src_frame.ntp_time_ms_;
+ dst_frame->packet_infos_ = src_frame.packet_infos_;
+}
+
+void RemixAndResample(const int16_t* src_data,
+ size_t samples_per_channel,
+ size_t num_channels,
+ int sample_rate_hz,
+ PushResampler<int16_t>* resampler,
+ AudioFrame* dst_frame) {
+ const int16_t* audio_ptr = src_data;
+ size_t audio_ptr_num_channels = num_channels;
+ int16_t downmixed_audio[AudioFrame::kMaxDataSizeSamples];
+
+ // Downmix before resampling.
+ if (num_channels > dst_frame->num_channels_) {
+ RTC_DCHECK(num_channels == 2 || num_channels == 4)
+ << "num_channels: " << num_channels;
+ RTC_DCHECK(dst_frame->num_channels_ == 1 || dst_frame->num_channels_ == 2)
+ << "dst_frame->num_channels_: " << dst_frame->num_channels_;
+
+ AudioFrameOperations::DownmixChannels(
+ src_data, num_channels, samples_per_channel, dst_frame->num_channels_,
+ downmixed_audio);
+ audio_ptr = downmixed_audio;
+ audio_ptr_num_channels = dst_frame->num_channels_;
+ }
+
+ if (resampler->InitializeIfNeeded(sample_rate_hz, dst_frame->sample_rate_hz_,
+ audio_ptr_num_channels) == -1) {
+ RTC_FATAL() << "InitializeIfNeeded failed: sample_rate_hz = "
+ << sample_rate_hz << ", dst_frame->sample_rate_hz_ = "
+ << dst_frame->sample_rate_hz_
+ << ", audio_ptr_num_channels = " << audio_ptr_num_channels;
+ }
+
+ // TODO(yujo): for muted input frames, don't resample. Either 1) allow
+ // resampler to return output length without doing the resample, so we know
+ // how much to zero here; or 2) make resampler accept a hint that the input is
+ // zeroed.
+ const size_t src_length = samples_per_channel * audio_ptr_num_channels;
+ int out_length =
+ resampler->Resample(audio_ptr, src_length, dst_frame->mutable_data(),
+ AudioFrame::kMaxDataSizeSamples);
+ if (out_length == -1) {
+ RTC_FATAL() << "Resample failed: audio_ptr = " << audio_ptr
+ << ", src_length = " << src_length
+ << ", dst_frame->mutable_data() = "
+ << dst_frame->mutable_data();
+ }
+ dst_frame->samples_per_channel_ = out_length / audio_ptr_num_channels;
+
+ // Upmix after resampling.
+ if (num_channels == 1 && dst_frame->num_channels_ == 2) {
+ // The audio in dst_frame really is mono at this point; MonoToStereo will
+ // set this back to stereo.
+ dst_frame->num_channels_ = 1;
+ AudioFrameOperations::UpmixChannels(2, dst_frame);
+ }
+}
+
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/remix_resample.h b/third_party/libwebrtc/audio/remix_resample.h
new file mode 100644
index 0000000000..bd8da76c6a
--- /dev/null
+++ b/third_party/libwebrtc/audio/remix_resample.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_REMIX_RESAMPLE_H_
+#define AUDIO_REMIX_RESAMPLE_H_
+
+#include "api/audio/audio_frame.h"
+#include "common_audio/resampler/include/push_resampler.h"
+
+namespace webrtc {
+namespace voe {
+
+// Upmix or downmix and resample the audio to `dst_frame`. Expects `dst_frame`
+// to have its sample rate and channels members set to the desired values.
+// Updates the `samples_per_channel_` member accordingly.
+//
+// This version has an AudioFrame `src_frame` as input and sets the output
+// `timestamp_`, `elapsed_time_ms_` and `ntp_time_ms_` members equals to the
+// input ones.
+void RemixAndResample(const AudioFrame& src_frame,
+ PushResampler<int16_t>* resampler,
+ AudioFrame* dst_frame);
+
+// This version has a pointer to the samples `src_data` as input and receives
+// `samples_per_channel`, `num_channels` and `sample_rate_hz` of the data as
+// parameters.
+void RemixAndResample(const int16_t* src_data,
+ size_t samples_per_channel,
+ size_t num_channels,
+ int sample_rate_hz,
+ PushResampler<int16_t>* resampler,
+ AudioFrame* dst_frame);
+
+} // namespace voe
+} // namespace webrtc
+
+#endif // AUDIO_REMIX_RESAMPLE_H_
diff --git a/third_party/libwebrtc/audio/remix_resample_unittest.cc b/third_party/libwebrtc/audio/remix_resample_unittest.cc
new file mode 100644
index 0000000000..31dcfac1fe
--- /dev/null
+++ b/third_party/libwebrtc/audio/remix_resample_unittest.cc
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/remix_resample.h"
+
+#include <cmath>
+
+#include "common_audio/resampler/include/push_resampler.h"
+#include "rtc_base/arraysize.h"
+#include "rtc_base/checks.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace voe {
+namespace {
+
+int GetFrameSize(int sample_rate_hz) {
+ return sample_rate_hz / 100;
+}
+
+class UtilityTest : public ::testing::Test {
+ protected:
+ UtilityTest() {
+ src_frame_.sample_rate_hz_ = 16000;
+ src_frame_.samples_per_channel_ = src_frame_.sample_rate_hz_ / 100;
+ src_frame_.num_channels_ = 1;
+ dst_frame_.CopyFrom(src_frame_);
+ golden_frame_.CopyFrom(src_frame_);
+ }
+
+ void RunResampleTest(int src_channels,
+ int src_sample_rate_hz,
+ int dst_channels,
+ int dst_sample_rate_hz);
+
+ PushResampler<int16_t> resampler_;
+ AudioFrame src_frame_;
+ AudioFrame dst_frame_;
+ AudioFrame golden_frame_;
+};
+
+// Sets the signal value to increase by `data` with every sample. Floats are
+// used so non-integer values result in rounding error, but not an accumulating
+// error.
+void SetMonoFrame(float data, int sample_rate_hz, AudioFrame* frame) {
+ frame->Mute();
+ frame->num_channels_ = 1;
+ frame->sample_rate_hz_ = sample_rate_hz;
+ frame->samples_per_channel_ = GetFrameSize(sample_rate_hz);
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_; i++) {
+ frame_data[i] = static_cast<int16_t>(data * i);
+ }
+}
+
+// Keep the existing sample rate.
+void SetMonoFrame(float data, AudioFrame* frame) {
+ SetMonoFrame(data, frame->sample_rate_hz_, frame);
+}
+
+// Sets the signal value to increase by `left` and `right` with every sample in
+// each channel respectively.
+void SetStereoFrame(float left,
+ float right,
+ int sample_rate_hz,
+ AudioFrame* frame) {
+ frame->Mute();
+ frame->num_channels_ = 2;
+ frame->sample_rate_hz_ = sample_rate_hz;
+ frame->samples_per_channel_ = GetFrameSize(sample_rate_hz);
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_; i++) {
+ frame_data[i * 2] = static_cast<int16_t>(left * i);
+ frame_data[i * 2 + 1] = static_cast<int16_t>(right * i);
+ }
+}
+
+// Keep the existing sample rate.
+void SetStereoFrame(float left, float right, AudioFrame* frame) {
+ SetStereoFrame(left, right, frame->sample_rate_hz_, frame);
+}
+
+// Sets the signal value to increase by `ch1`, `ch2`, `ch3`, `ch4` with every
+// sample in each channel respectively.
+void SetQuadFrame(float ch1,
+ float ch2,
+ float ch3,
+ float ch4,
+ int sample_rate_hz,
+ AudioFrame* frame) {
+ frame->Mute();
+ frame->num_channels_ = 4;
+ frame->sample_rate_hz_ = sample_rate_hz;
+ frame->samples_per_channel_ = GetFrameSize(sample_rate_hz);
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_; i++) {
+ frame_data[i * 4] = static_cast<int16_t>(ch1 * i);
+ frame_data[i * 4 + 1] = static_cast<int16_t>(ch2 * i);
+ frame_data[i * 4 + 2] = static_cast<int16_t>(ch3 * i);
+ frame_data[i * 4 + 3] = static_cast<int16_t>(ch4 * i);
+ }
+}
+
+void VerifyParams(const AudioFrame& ref_frame, const AudioFrame& test_frame) {
+ EXPECT_EQ(ref_frame.num_channels_, test_frame.num_channels_);
+ EXPECT_EQ(ref_frame.samples_per_channel_, test_frame.samples_per_channel_);
+ EXPECT_EQ(ref_frame.sample_rate_hz_, test_frame.sample_rate_hz_);
+}
+
+// Computes the best SNR based on the error between `ref_frame` and
+// `test_frame`. It allows for up to a `max_delay` in samples between the
+// signals to compensate for the resampling delay.
+float ComputeSNR(const AudioFrame& ref_frame,
+ const AudioFrame& test_frame,
+ size_t max_delay) {
+ VerifyParams(ref_frame, test_frame);
+ float best_snr = 0;
+ size_t best_delay = 0;
+ for (size_t delay = 0; delay <= max_delay; delay++) {
+ float mse = 0;
+ float variance = 0;
+ const int16_t* ref_frame_data = ref_frame.data();
+ const int16_t* test_frame_data = test_frame.data();
+ for (size_t i = 0;
+ i < ref_frame.samples_per_channel_ * ref_frame.num_channels_ - delay;
+ i++) {
+ int error = ref_frame_data[i] - test_frame_data[i + delay];
+ mse += error * error;
+ variance += ref_frame_data[i] * ref_frame_data[i];
+ }
+ float snr = 100; // We assign 100 dB to the zero-error case.
+ if (mse > 0)
+ snr = 10 * std::log10(variance / mse);
+ if (snr > best_snr) {
+ best_snr = snr;
+ best_delay = delay;
+ }
+ }
+ printf("SNR=%.1f dB at delay=%zu\n", best_snr, best_delay);
+ return best_snr;
+}
+
+void VerifyFramesAreEqual(const AudioFrame& ref_frame,
+ const AudioFrame& test_frame) {
+ VerifyParams(ref_frame, test_frame);
+ const int16_t* ref_frame_data = ref_frame.data();
+ const int16_t* test_frame_data = test_frame.data();
+ for (size_t i = 0;
+ i < ref_frame.samples_per_channel_ * ref_frame.num_channels_; i++) {
+ EXPECT_EQ(ref_frame_data[i], test_frame_data[i]);
+ }
+}
+
+void UtilityTest::RunResampleTest(int src_channels,
+ int src_sample_rate_hz,
+ int dst_channels,
+ int dst_sample_rate_hz) {
+ PushResampler<int16_t> resampler; // Create a new one with every test.
+ const int16_t kSrcCh1 = 30; // Shouldn't overflow for any used sample rate.
+ const int16_t kSrcCh2 = 15;
+ const int16_t kSrcCh3 = 22;
+ const int16_t kSrcCh4 = 8;
+ const float resampling_factor =
+ (1.0 * src_sample_rate_hz) / dst_sample_rate_hz;
+ const float dst_ch1 = resampling_factor * kSrcCh1;
+ const float dst_ch2 = resampling_factor * kSrcCh2;
+ const float dst_ch3 = resampling_factor * kSrcCh3;
+ const float dst_ch4 = resampling_factor * kSrcCh4;
+ const float dst_stereo_to_mono = (dst_ch1 + dst_ch2) / 2;
+ const float dst_quad_to_mono = (dst_ch1 + dst_ch2 + dst_ch3 + dst_ch4) / 4;
+ const float dst_quad_to_stereo_ch1 = (dst_ch1 + dst_ch2) / 2;
+ const float dst_quad_to_stereo_ch2 = (dst_ch3 + dst_ch4) / 2;
+ if (src_channels == 1)
+ SetMonoFrame(kSrcCh1, src_sample_rate_hz, &src_frame_);
+ else if (src_channels == 2)
+ SetStereoFrame(kSrcCh1, kSrcCh2, src_sample_rate_hz, &src_frame_);
+ else
+ SetQuadFrame(kSrcCh1, kSrcCh2, kSrcCh3, kSrcCh4, src_sample_rate_hz,
+ &src_frame_);
+
+ if (dst_channels == 1) {
+ SetMonoFrame(0, dst_sample_rate_hz, &dst_frame_);
+ if (src_channels == 1)
+ SetMonoFrame(dst_ch1, dst_sample_rate_hz, &golden_frame_);
+ else if (src_channels == 2)
+ SetMonoFrame(dst_stereo_to_mono, dst_sample_rate_hz, &golden_frame_);
+ else
+ SetMonoFrame(dst_quad_to_mono, dst_sample_rate_hz, &golden_frame_);
+ } else {
+ SetStereoFrame(0, 0, dst_sample_rate_hz, &dst_frame_);
+ if (src_channels == 1)
+ SetStereoFrame(dst_ch1, dst_ch1, dst_sample_rate_hz, &golden_frame_);
+ else if (src_channels == 2)
+ SetStereoFrame(dst_ch1, dst_ch2, dst_sample_rate_hz, &golden_frame_);
+ else
+ SetStereoFrame(dst_quad_to_stereo_ch1, dst_quad_to_stereo_ch2,
+ dst_sample_rate_hz, &golden_frame_);
+ }
+
+ // The sinc resampler has a known delay, which we compute here. Multiplying by
+ // two gives us a crude maximum for any resampling, as the old resampler
+ // typically (but not always) has lower delay.
+ static const size_t kInputKernelDelaySamples = 16;
+ const size_t max_delay = static_cast<size_t>(
+ static_cast<double>(dst_sample_rate_hz) / src_sample_rate_hz *
+ kInputKernelDelaySamples * dst_channels * 2);
+ printf("(%d, %d Hz) -> (%d, %d Hz) ", // SNR reported on the same line later.
+ src_channels, src_sample_rate_hz, dst_channels, dst_sample_rate_hz);
+ RemixAndResample(src_frame_, &resampler, &dst_frame_);
+
+ if (src_sample_rate_hz == 96000 && dst_sample_rate_hz <= 11025) {
+ // The sinc resampler gives poor SNR at this extreme conversion, but we
+ // expect to see this rarely in practice.
+ EXPECT_GT(ComputeSNR(golden_frame_, dst_frame_, max_delay), 14.0f);
+ } else {
+ EXPECT_GT(ComputeSNR(golden_frame_, dst_frame_, max_delay), 46.0f);
+ }
+}
+
+TEST_F(UtilityTest, RemixAndResampleCopyFrameSucceeds) {
+ // Stereo -> stereo.
+ SetStereoFrame(10, 10, &src_frame_);
+ SetStereoFrame(0, 0, &dst_frame_);
+ RemixAndResample(src_frame_, &resampler_, &dst_frame_);
+ VerifyFramesAreEqual(src_frame_, dst_frame_);
+
+ // Mono -> mono.
+ SetMonoFrame(20, &src_frame_);
+ SetMonoFrame(0, &dst_frame_);
+ RemixAndResample(src_frame_, &resampler_, &dst_frame_);
+ VerifyFramesAreEqual(src_frame_, dst_frame_);
+}
+
+TEST_F(UtilityTest, RemixAndResampleMixingOnlySucceeds) {
+ // Stereo -> mono.
+ SetStereoFrame(0, 0, &dst_frame_);
+ SetMonoFrame(10, &src_frame_);
+ SetStereoFrame(10, 10, &golden_frame_);
+ RemixAndResample(src_frame_, &resampler_, &dst_frame_);
+ VerifyFramesAreEqual(dst_frame_, golden_frame_);
+
+ // Mono -> stereo.
+ SetMonoFrame(0, &dst_frame_);
+ SetStereoFrame(10, 20, &src_frame_);
+ SetMonoFrame(15, &golden_frame_);
+ RemixAndResample(src_frame_, &resampler_, &dst_frame_);
+ VerifyFramesAreEqual(golden_frame_, dst_frame_);
+}
+
+TEST_F(UtilityTest, RemixAndResampleSucceeds) {
+ const int kSampleRates[] = {8000, 11025, 16000, 22050,
+ 32000, 44100, 48000, 96000};
+ const int kSrcChannels[] = {1, 2, 4};
+ const int kDstChannels[] = {1, 2};
+
+ for (int src_rate : kSampleRates) {
+ for (int dst_rate : kSampleRates) {
+ for (size_t src_channels : kSrcChannels) {
+ for (size_t dst_channels : kDstChannels) {
+ RunResampleTest(src_channels, src_rate, dst_channels, dst_rate);
+ }
+ }
+ }
+ }
+}
+
+} // namespace
+} // namespace voe
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/OWNERS b/third_party/libwebrtc/audio/test/OWNERS
new file mode 100644
index 0000000000..3754d4823a
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/OWNERS
@@ -0,0 +1,3 @@
+# Script to launch low_bandwidth_audio_test.
+per-file low_bandwidth_audio_test.py=mbonadei@webrtc.org
+per-file low_bandwidth_audio_test.py=jleconte@webrtc.org
diff --git a/third_party/libwebrtc/audio/test/audio_end_to_end_test.cc b/third_party/libwebrtc/audio/test/audio_end_to_end_test.cc
new file mode 100644
index 0000000000..b7dfdb89f6
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/audio_end_to_end_test.cc
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/test/audio_end_to_end_test.h"
+
+#include <algorithm>
+#include <memory>
+
+#include "api/task_queue/task_queue_base.h"
+#include "call/fake_network_pipe.h"
+#include "call/simulated_network.h"
+#include "system_wrappers/include/sleep.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+// Wait half a second between stopping sending and stopping receiving audio.
+constexpr int kExtraRecordTimeMs = 500;
+
+constexpr int kSampleRate = 48000;
+} // namespace
+
+AudioEndToEndTest::AudioEndToEndTest()
+ : EndToEndTest(CallTest::kDefaultTimeout) {}
+
+size_t AudioEndToEndTest::GetNumVideoStreams() const {
+ return 0;
+}
+
+size_t AudioEndToEndTest::GetNumAudioStreams() const {
+ return 1;
+}
+
+size_t AudioEndToEndTest::GetNumFlexfecStreams() const {
+ return 0;
+}
+
+std::unique_ptr<TestAudioDeviceModule::Capturer>
+AudioEndToEndTest::CreateCapturer() {
+ return TestAudioDeviceModule::CreatePulsedNoiseCapturer(32000, kSampleRate);
+}
+
+std::unique_ptr<TestAudioDeviceModule::Renderer>
+AudioEndToEndTest::CreateRenderer() {
+ return TestAudioDeviceModule::CreateDiscardRenderer(kSampleRate);
+}
+
+void AudioEndToEndTest::OnFakeAudioDevicesCreated(
+ TestAudioDeviceModule* send_audio_device,
+ TestAudioDeviceModule* recv_audio_device) {
+ send_audio_device_ = send_audio_device;
+}
+
+void AudioEndToEndTest::ModifyAudioConfigs(
+ AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>* receive_configs) {
+ // Large bitrate by default.
+ const webrtc::SdpAudioFormat kDefaultFormat("opus", 48000, 2,
+ {{"stereo", "1"}});
+ send_config->send_codec_spec = AudioSendStream::Config::SendCodecSpec(
+ test::CallTest::kAudioSendPayloadType, kDefaultFormat);
+ send_config->min_bitrate_bps = 32000;
+ send_config->max_bitrate_bps = 32000;
+}
+
+void AudioEndToEndTest::OnAudioStreamsCreated(
+ AudioSendStream* send_stream,
+ const std::vector<AudioReceiveStreamInterface*>& receive_streams) {
+ ASSERT_NE(nullptr, send_stream);
+ ASSERT_EQ(1u, receive_streams.size());
+ ASSERT_NE(nullptr, receive_streams[0]);
+ send_stream_ = send_stream;
+ receive_stream_ = receive_streams[0];
+}
+
+void AudioEndToEndTest::PerformTest() {
+ // Wait until the input audio file is done...
+ send_audio_device_->WaitForRecordingEnd();
+ // and some extra time to account for network delay.
+ SleepMs(GetSendTransportConfig().queue_delay_ms + kExtraRecordTimeMs);
+}
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/audio_end_to_end_test.h b/third_party/libwebrtc/audio/test/audio_end_to_end_test.h
new file mode 100644
index 0000000000..607fe692be
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/audio_end_to_end_test.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef AUDIO_TEST_AUDIO_END_TO_END_TEST_H_
+#define AUDIO_TEST_AUDIO_END_TO_END_TEST_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "api/task_queue/task_queue_base.h"
+#include "api/test/simulated_network.h"
+#include "test/call_test.h"
+
+namespace webrtc {
+namespace test {
+
+class AudioEndToEndTest : public test::EndToEndTest {
+ public:
+ AudioEndToEndTest();
+
+ protected:
+ TestAudioDeviceModule* send_audio_device() { return send_audio_device_; }
+ const AudioSendStream* send_stream() const { return send_stream_; }
+ const AudioReceiveStreamInterface* receive_stream() const {
+ return receive_stream_;
+ }
+
+ size_t GetNumVideoStreams() const override;
+ size_t GetNumAudioStreams() const override;
+ size_t GetNumFlexfecStreams() const override;
+
+ std::unique_ptr<TestAudioDeviceModule::Capturer> CreateCapturer() override;
+ std::unique_ptr<TestAudioDeviceModule::Renderer> CreateRenderer() override;
+
+ void OnFakeAudioDevicesCreated(
+ TestAudioDeviceModule* send_audio_device,
+ TestAudioDeviceModule* recv_audio_device) override;
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override;
+ void OnAudioStreamsCreated(AudioSendStream* send_stream,
+ const std::vector<AudioReceiveStreamInterface*>&
+ receive_streams) override;
+
+ void PerformTest() override;
+
+ private:
+ TestAudioDeviceModule* send_audio_device_ = nullptr;
+ AudioSendStream* send_stream_ = nullptr;
+ AudioReceiveStreamInterface* receive_stream_ = nullptr;
+};
+
+} // namespace test
+} // namespace webrtc
+
+#endif // AUDIO_TEST_AUDIO_END_TO_END_TEST_H_
diff --git a/third_party/libwebrtc/audio/test/audio_stats_test.cc b/third_party/libwebrtc/audio/test/audio_stats_test.cc
new file mode 100644
index 0000000000..1c81432574
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/audio_stats_test.cc
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/test/audio_end_to_end_test.h"
+#include "rtc_base/numerics/safe_compare.h"
+#include "system_wrappers/include/sleep.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+bool IsNear(int reference, int v) {
+ // Margin is 10%.
+ const int error = reference / 10 + 1;
+ return std::abs(reference - v) <= error;
+}
+
+class NoLossTest : public AudioEndToEndTest {
+ public:
+ const int kTestDurationMs = 8000;
+ const int kBytesSent = 69351;
+ const int32_t kPacketsSent = 400;
+ const int64_t kRttMs = 100;
+
+ NoLossTest() = default;
+
+ BuiltInNetworkBehaviorConfig GetSendTransportConfig() const override {
+ BuiltInNetworkBehaviorConfig pipe_config;
+ pipe_config.queue_delay_ms = kRttMs / 2;
+ return pipe_config;
+ }
+
+ void PerformTest() override {
+ SleepMs(kTestDurationMs);
+ send_audio_device()->StopRecording();
+ AudioEndToEndTest::PerformTest();
+ }
+
+ void OnStreamsStopped() override {
+ AudioSendStream::Stats send_stats = send_stream()->GetStats();
+ EXPECT_PRED2(IsNear, kBytesSent, send_stats.payload_bytes_sent);
+ EXPECT_PRED2(IsNear, kPacketsSent, send_stats.packets_sent);
+ EXPECT_EQ(0, send_stats.packets_lost);
+ EXPECT_EQ(0.0f, send_stats.fraction_lost);
+ EXPECT_EQ("opus", send_stats.codec_name);
+ // send_stats.jitter_ms
+ EXPECT_PRED2(IsNear, kRttMs, send_stats.rtt_ms);
+ // Send level is 0 because it is cleared in TransmitMixer::StopSend().
+ EXPECT_EQ(0, send_stats.audio_level);
+ // send_stats.total_input_energy
+ // send_stats.total_input_duration
+ EXPECT_FALSE(send_stats.apm_statistics.delay_median_ms);
+ EXPECT_FALSE(send_stats.apm_statistics.delay_standard_deviation_ms);
+ EXPECT_FALSE(send_stats.apm_statistics.echo_return_loss);
+ EXPECT_FALSE(send_stats.apm_statistics.echo_return_loss_enhancement);
+ EXPECT_FALSE(send_stats.apm_statistics.residual_echo_likelihood);
+ EXPECT_FALSE(send_stats.apm_statistics.residual_echo_likelihood_recent_max);
+
+ AudioReceiveStreamInterface::Stats recv_stats =
+ receive_stream()->GetStats(/*get_and_clear_legacy_stats=*/true);
+ EXPECT_PRED2(IsNear, kBytesSent, recv_stats.payload_bytes_rcvd);
+ EXPECT_PRED2(IsNear, kPacketsSent, recv_stats.packets_rcvd);
+ EXPECT_EQ(0, recv_stats.packets_lost);
+ EXPECT_EQ("opus", send_stats.codec_name);
+ // recv_stats.jitter_ms
+ // recv_stats.jitter_buffer_ms
+ EXPECT_EQ(20u, recv_stats.jitter_buffer_preferred_ms);
+ // recv_stats.delay_estimate_ms
+ // Receive level is 0 because it is cleared in Channel::StopPlayout().
+ EXPECT_EQ(0, recv_stats.audio_level);
+ // recv_stats.total_output_energy
+ // recv_stats.total_samples_received
+ // recv_stats.total_output_duration
+ // recv_stats.concealed_samples
+ // recv_stats.expand_rate
+ // recv_stats.speech_expand_rate
+ EXPECT_EQ(0.0, recv_stats.secondary_decoded_rate);
+ EXPECT_EQ(0.0, recv_stats.secondary_discarded_rate);
+ EXPECT_EQ(0.0, recv_stats.accelerate_rate);
+ EXPECT_EQ(0.0, recv_stats.preemptive_expand_rate);
+ EXPECT_EQ(0, recv_stats.decoding_calls_to_silence_generator);
+ // recv_stats.decoding_calls_to_neteq
+ // recv_stats.decoding_normal
+ // recv_stats.decoding_plc
+ EXPECT_EQ(0, recv_stats.decoding_cng);
+ // recv_stats.decoding_plc_cng
+ // recv_stats.decoding_muted_output
+ // Capture start time is -1 because we do not have an associated send stream
+ // on the receiver side.
+ EXPECT_EQ(-1, recv_stats.capture_start_ntp_time_ms);
+
+ // Match these stats between caller and receiver.
+ EXPECT_EQ(send_stats.local_ssrc, recv_stats.remote_ssrc);
+ EXPECT_EQ(*send_stats.codec_payload_type, *recv_stats.codec_payload_type);
+ }
+};
+} // namespace
+
+using AudioStatsTest = CallTest;
+
+TEST_F(AudioStatsTest, DISABLED_NoLoss) {
+ NoLossTest test;
+ RunBaseTest(&test);
+}
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/low_bandwidth_audio_test.cc b/third_party/libwebrtc/audio/test/low_bandwidth_audio_test.cc
new file mode 100644
index 0000000000..f385eb9dcc
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/low_bandwidth_audio_test.cc
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "absl/flags/declare.h"
+#include "absl/flags/flag.h"
+#include "api/test/simulated_network.h"
+#include "audio/test/audio_end_to_end_test.h"
+#include "system_wrappers/include/sleep.h"
+#include "test/testsupport/file_utils.h"
+
+ABSL_DECLARE_FLAG(int, sample_rate_hz);
+ABSL_DECLARE_FLAG(bool, quick);
+
+namespace webrtc {
+namespace test {
+namespace {
+
+std::string FileSampleRateSuffix() {
+ return std::to_string(absl::GetFlag(FLAGS_sample_rate_hz) / 1000);
+}
+
+class AudioQualityTest : public AudioEndToEndTest {
+ public:
+ AudioQualityTest() = default;
+
+ private:
+ std::string AudioInputFile() const {
+ return test::ResourcePath(
+ "voice_engine/audio_tiny" + FileSampleRateSuffix(), "wav");
+ }
+
+ std::string AudioOutputFile() const {
+ const ::testing::TestInfo* const test_info =
+ ::testing::UnitTest::GetInstance()->current_test_info();
+ return webrtc::test::OutputPath() + "LowBandwidth_" + test_info->name() +
+ "_" + FileSampleRateSuffix() + ".wav";
+ }
+
+ std::unique_ptr<TestAudioDeviceModule::Capturer> CreateCapturer() override {
+ return TestAudioDeviceModule::CreateWavFileReader(AudioInputFile());
+ }
+
+ std::unique_ptr<TestAudioDeviceModule::Renderer> CreateRenderer() override {
+ return TestAudioDeviceModule::CreateBoundedWavFileWriter(
+ AudioOutputFile(), absl::GetFlag(FLAGS_sample_rate_hz));
+ }
+
+ void PerformTest() override {
+ if (absl::GetFlag(FLAGS_quick)) {
+ // Let the recording run for a small amount of time to check if it works.
+ SleepMs(1000);
+ } else {
+ AudioEndToEndTest::PerformTest();
+ }
+ }
+
+ void OnStreamsStopped() override {
+ const ::testing::TestInfo* const test_info =
+ ::testing::UnitTest::GetInstance()->current_test_info();
+
+ // Output information about the input and output audio files so that further
+ // processing can be done by an external process.
+ printf("TEST %s %s %s\n", test_info->name(), AudioInputFile().c_str(),
+ AudioOutputFile().c_str());
+ }
+};
+
+class Mobile2GNetworkTest : public AudioQualityTest {
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ send_config->send_codec_spec = AudioSendStream::Config::SendCodecSpec(
+ test::CallTest::kAudioSendPayloadType,
+ {"OPUS",
+ 48000,
+ 2,
+ {{"maxaveragebitrate", "6000"}, {"ptime", "60"}, {"stereo", "1"}}});
+ }
+
+ BuiltInNetworkBehaviorConfig GetSendTransportConfig() const override {
+ BuiltInNetworkBehaviorConfig pipe_config;
+ pipe_config.link_capacity_kbps = 12;
+ pipe_config.queue_length_packets = 1500;
+ pipe_config.queue_delay_ms = 400;
+ return pipe_config;
+ }
+};
+} // namespace
+
+using LowBandwidthAudioTest = CallTest;
+
+TEST_F(LowBandwidthAudioTest, GoodNetworkHighBitrate) {
+ AudioQualityTest test;
+ RunBaseTest(&test);
+}
+
+TEST_F(LowBandwidthAudioTest, Mobile2GNetwork) {
+ Mobile2GNetworkTest test;
+ RunBaseTest(&test);
+}
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/low_bandwidth_audio_test.py b/third_party/libwebrtc/audio/test/low_bandwidth_audio_test.py
new file mode 100755
index 0000000000..07065e2c8d
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/low_bandwidth_audio_test.py
@@ -0,0 +1,365 @@
+#!/usr/bin/env vpython3
+# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS. All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+"""
+This script is the wrapper that runs the low-bandwidth audio test.
+
+After running the test, post-process steps for calculating audio quality of the
+output files will be performed.
+"""
+
+import argparse
+import collections
+import json
+import logging
+import os
+import re
+import shutil
+import subprocess
+import sys
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+SRC_DIR = os.path.normpath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir))
+
+NO_TOOLS_ERROR_MESSAGE = (
+ 'Could not find PESQ or POLQA at %s.\n'
+ '\n'
+ 'To fix this run:\n'
+ ' python %s %s\n'
+ '\n'
+ 'Note that these tools are Google-internal due to licensing, so in order '
+ 'to use them you will have to get your own license and manually put them '
+ 'in the right location.\n'
+ 'See https://cs.chromium.org/chromium/src/third_party/webrtc/tools_webrtc/'
+ 'download_tools.py?rcl=bbceb76f540159e2dba0701ac03c514f01624130&l=13')
+
+
+def _LogCommand(command):
+ logging.info('Running %r', command)
+ return command
+
+
+def _ParseArgs():
+ parser = argparse.ArgumentParser(description='Run low-bandwidth audio tests.')
+ parser.add_argument('build_dir',
+ help='Path to the build directory (e.g. out/Release).')
+ parser.add_argument('--remove',
+ action='store_true',
+ help='Remove output audio files after testing.')
+ parser.add_argument(
+ '--android',
+ action='store_true',
+ help='Perform the test on a connected Android device instead.')
+ parser.add_argument('--adb-path', help='Path to adb binary.', default='adb')
+ parser.add_argument('--num-retries',
+ default='0',
+ help='Number of times to retry the test on Android.')
+ parser.add_argument(
+ '--isolated-script-test-perf-output',
+ default=None,
+ help='Path to store perf results in histogram proto format.')
+ parser.add_argument(
+ '--isolated-script-test-output',
+ default=None,
+ help='Path to output an empty JSON file which Chromium infra requires.')
+
+ return parser.parse_known_args()
+
+
+def _GetPlatform():
+ if sys.platform == 'win32':
+ return 'win'
+ if sys.platform == 'darwin':
+ return 'mac'
+ if sys.platform.startswith('linux'):
+ return 'linux'
+ raise AssertionError('Unknown platform %s' % sys.platform)
+
+
+def _GetExtension():
+ return '.exe' if sys.platform == 'win32' else ''
+
+
+def _GetPathToTools():
+ tools_dir = os.path.join(SRC_DIR, 'tools_webrtc')
+ toolchain_dir = os.path.join(tools_dir, 'audio_quality')
+
+ platform = _GetPlatform()
+ ext = _GetExtension()
+
+ pesq_path = os.path.join(toolchain_dir, platform, 'pesq' + ext)
+ if not os.path.isfile(pesq_path):
+ pesq_path = None
+
+ polqa_path = os.path.join(toolchain_dir, platform, 'PolqaOem64' + ext)
+ if not os.path.isfile(polqa_path):
+ polqa_path = None
+
+ if (platform != 'mac' and not polqa_path) or not pesq_path:
+ logging.error(NO_TOOLS_ERROR_MESSAGE, toolchain_dir,
+ os.path.join(tools_dir, 'download_tools.py'), toolchain_dir)
+
+ return pesq_path, polqa_path
+
+
+def ExtractTestRuns(lines, echo=False):
+ """Extracts information about tests from the output of a test runner.
+
+ Produces tuples
+ (android_device, test_name, reference_file, degraded_file, cur_perf_results).
+ """
+ for line in lines:
+ if echo:
+ sys.stdout.write(line)
+
+ # Output from Android has a prefix with the device name.
+ android_prefix_re = r'(?:I\b.+\brun_tests_on_device\((.+?)\)\s*)?'
+ test_re = r'^' + android_prefix_re + (r'TEST (\w+) ([^ ]+?) ([^\s]+)'
+ r' ?([^\s]+)?\s*$')
+
+ match = re.search(test_re, line)
+ if match:
+ yield match.groups()
+
+
+def _GetFile(file_path,
+ out_dir,
+ move=False,
+ android=False,
+ adb_prefix=('adb', )):
+ out_file_name = os.path.basename(file_path)
+ out_file_path = os.path.join(out_dir, out_file_name)
+
+ if android:
+ # Pull the file from the connected Android device.
+ adb_command = adb_prefix + ('pull', file_path, out_dir)
+ subprocess.check_call(_LogCommand(adb_command))
+ if move:
+ # Remove that file.
+ adb_command = adb_prefix + ('shell', 'rm', file_path)
+ subprocess.check_call(_LogCommand(adb_command))
+ elif os.path.abspath(file_path) != os.path.abspath(out_file_path):
+ if move:
+ shutil.move(file_path, out_file_path)
+ else:
+ shutil.copy(file_path, out_file_path)
+
+ return out_file_path
+
+
+def _RunPesq(executable_path,
+ reference_file,
+ degraded_file,
+ sample_rate_hz=16000):
+ directory = os.path.dirname(reference_file)
+ assert os.path.dirname(degraded_file) == directory
+
+ # Analyze audio.
+ command = [
+ executable_path,
+ '+%d' % sample_rate_hz,
+ os.path.basename(reference_file),
+ os.path.basename(degraded_file)
+ ]
+ # Need to provide paths in the current directory due to a bug in PESQ:
+ # On Mac, for some 'path/to/file.wav', if 'file.wav' is longer than
+ # 'path/to', PESQ crashes.
+ out = subprocess.check_output(_LogCommand(command),
+ cwd=directory,
+ universal_newlines=True,
+ stderr=subprocess.STDOUT)
+
+ # Find the scores in stdout of PESQ.
+ match = re.search(
+ r'Prediction \(Raw MOS, MOS-LQO\):\s+=\s+([\d.]+)\s+([\d.]+)', out)
+ if match:
+ raw_mos, _ = match.groups()
+ return {'pesq_mos': (raw_mos, 'unitless')}
+ logging.error('PESQ: %s', out.splitlines()[-1])
+ return {}
+
+
+def _RunPolqa(executable_path, reference_file, degraded_file):
+ # Analyze audio.
+ command = [
+ executable_path, '-q', '-LC', 'NB', '-Ref', reference_file, '-Test',
+ degraded_file
+ ]
+ process = subprocess.Popen(_LogCommand(command),
+ universal_newlines=True,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ out, err = process.communicate()
+
+ # Find the scores in stdout of POLQA.
+ match = re.search(r'\bMOS-LQO:\s+([\d.]+)', out)
+
+ if process.returncode != 0 or not match:
+ if process.returncode == 2:
+ logging.warning('%s (2)', err.strip())
+ logging.warning('POLQA license error, skipping test.')
+ else:
+ logging.error('%s (%d)', err.strip(), process.returncode)
+ return {}
+
+ mos_lqo, = match.groups()
+ return {'polqa_mos_lqo': (mos_lqo, 'unitless')}
+
+
+def _MergeInPerfResultsFromCcTests(histograms, run_perf_results_file):
+ from tracing.value import histogram_set
+
+ cc_histograms = histogram_set.HistogramSet()
+ with open(run_perf_results_file, 'rb') as f:
+ contents = f.read()
+ if not contents:
+ return
+
+ cc_histograms.ImportProto(contents)
+
+ histograms.Merge(cc_histograms)
+
+
+Analyzer = collections.namedtuple(
+ 'Analyzer', ['name', 'func', 'executable', 'sample_rate_hz'])
+
+
+def _ConfigurePythonPath(args):
+ script_dir = os.path.dirname(os.path.realpath(__file__))
+ checkout_root = os.path.abspath(os.path.join(script_dir, os.pardir,
+ os.pardir))
+
+ # TODO(https://crbug.com/1029452): Use a copy rule and add these from the
+ # out dir like for the third_party/protobuf code.
+ sys.path.insert(
+ 0, os.path.join(checkout_root, 'third_party', 'catapult', 'tracing'))
+
+ # The low_bandwidth_audio_perf_test gn rule will build the protobuf stub
+ # for python, so put it in the path for this script before we attempt to
+ # import it.
+ histogram_proto_path = os.path.join(os.path.abspath(args.build_dir),
+ 'pyproto', 'tracing', 'tracing', 'proto')
+ sys.path.insert(0, histogram_proto_path)
+ proto_stub_path = os.path.join(os.path.abspath(args.build_dir), 'pyproto')
+ sys.path.insert(0, proto_stub_path)
+
+ # Fail early in case the proto hasn't been built.
+ try:
+ #pylint: disable=unused-import
+ import histogram_pb2
+ except ImportError as e:
+ raise ImportError('Could not import histogram_pb2. You need to build the '
+ 'low_bandwidth_audio_perf_test target before invoking '
+ 'this script. Expected to find '
+ 'histogram_pb2.py in %s.' % histogram_proto_path) from e
+
+
+def main():
+ logging.basicConfig(format='%(asctime)s %(levelname)-8s %(message)s',
+ level=logging.INFO,
+ datefmt='%Y-%m-%d %H:%M:%S')
+ logging.info('Invoked with %s', str(sys.argv))
+
+ args, extra_test_args = _ParseArgs()
+
+ _ConfigurePythonPath(args)
+
+ # Import catapult modules here after configuring the pythonpath.
+ from tracing.value import histogram_set
+ from tracing.value.diagnostics import reserved_infos
+ from tracing.value.diagnostics import generic_set
+
+ pesq_path, polqa_path = _GetPathToTools()
+ if pesq_path is None:
+ return 1
+
+ out_dir = os.path.join(args.build_dir, '..')
+ if args.android:
+ test_command = [
+ os.path.join(args.build_dir, 'bin', 'run_low_bandwidth_audio_test'),
+ '-v', '--num-retries', args.num_retries
+ ]
+ else:
+ test_command = [os.path.join(args.build_dir, 'low_bandwidth_audio_test')]
+
+ analyzers = [Analyzer('pesq', _RunPesq, pesq_path, 16000)]
+ # Check if POLQA can run at all, or skip the 48 kHz tests entirely.
+ example_path = os.path.join(SRC_DIR, 'resources', 'voice_engine',
+ 'audio_tiny48.wav')
+ if polqa_path and _RunPolqa(polqa_path, example_path, example_path):
+ analyzers.append(Analyzer('polqa', _RunPolqa, polqa_path, 48000))
+
+ histograms = histogram_set.HistogramSet()
+ for analyzer in analyzers:
+ # Start the test executable that produces audio files.
+ test_process = subprocess.Popen(_LogCommand(test_command + [
+ '--sample_rate_hz=%d' % analyzer.sample_rate_hz,
+ '--test_case_prefix=%s' % analyzer.name,
+ ] + extra_test_args),
+ universal_newlines=True,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.STDOUT)
+ perf_results_file = None
+ try:
+ lines = iter(test_process.stdout.readline, '')
+ for result in ExtractTestRuns(lines, echo=True):
+ (android_device, test_name, reference_file, degraded_file,
+ perf_results_file) = result
+
+ adb_prefix = (args.adb_path, )
+ if android_device:
+ adb_prefix += ('-s', android_device)
+
+ reference_file = _GetFile(reference_file,
+ out_dir,
+ android=args.android,
+ adb_prefix=adb_prefix)
+ degraded_file = _GetFile(degraded_file,
+ out_dir,
+ move=True,
+ android=args.android,
+ adb_prefix=adb_prefix)
+
+ analyzer_results = analyzer.func(analyzer.executable, reference_file,
+ degraded_file)
+ for metric, (value, units) in list(analyzer_results.items()):
+ hist = histograms.CreateHistogram(metric, units, [value])
+ user_story = generic_set.GenericSet([test_name])
+ hist.diagnostics[reserved_infos.STORIES.name] = user_story
+
+ # Output human readable results.
+ print('RESULT %s: %s= %s %s' % (metric, test_name, value, units))
+
+ if args.remove:
+ os.remove(reference_file)
+ os.remove(degraded_file)
+ finally:
+ test_process.terminate()
+ if perf_results_file:
+ perf_results_file = _GetFile(perf_results_file,
+ out_dir,
+ move=True,
+ android=args.android,
+ adb_prefix=adb_prefix)
+ _MergeInPerfResultsFromCcTests(histograms, perf_results_file)
+ if args.remove:
+ os.remove(perf_results_file)
+
+ if args.isolated_script_test_perf_output:
+ with open(args.isolated_script_test_perf_output, 'wb') as f:
+ f.write(histograms.AsProto().SerializeToString())
+
+ if args.isolated_script_test_output:
+ with open(args.isolated_script_test_output, 'w') as f:
+ json.dump({"version": 3}, f)
+
+ return test_process.wait()
+
+
+if __name__ == '__main__':
+ sys.exit(main())
diff --git a/third_party/libwebrtc/audio/test/low_bandwidth_audio_test_flags.cc b/third_party/libwebrtc/audio/test/low_bandwidth_audio_test_flags.cc
new file mode 100644
index 0000000000..9d93790d3d
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/low_bandwidth_audio_test_flags.cc
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+// #ifndef AUDIO_TEST_LOW_BANDWIDTH_AUDIO_TEST_FLAGS_H_
+// #define AUDIO_TEST_LOW_BANDWIDTH_AUDIO_TEST_FLAGS_H_
+
+#include "absl/flags/flag.h"
+
+ABSL_FLAG(int,
+ sample_rate_hz,
+ 16000,
+ "Sample rate (Hz) of the produced audio files.");
+
+ABSL_FLAG(bool,
+ quick,
+ false,
+ "Don't do the full audio recording. "
+ "Used to quickly check that the test runs without crashing.");
+
+ABSL_FLAG(std::string, test_case_prefix, "", "Test case prefix.");
+
+// #endif // AUDIO_TEST_LOW_BANDWIDTH_AUDIO_TEST_FLAGS_H_
diff --git a/third_party/libwebrtc/audio/test/nack_test.cc b/third_party/libwebrtc/audio/test/nack_test.cc
new file mode 100644
index 0000000000..c4bfe8306f
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/nack_test.cc
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/test/audio_end_to_end_test.h"
+#include "system_wrappers/include/sleep.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace test {
+
+using NackTest = CallTest;
+
+TEST_F(NackTest, ShouldNackInLossyNetwork) {
+ class NackTest : public AudioEndToEndTest {
+ public:
+ const int kTestDurationMs = 2000;
+ const int64_t kRttMs = 30;
+ const int64_t kLossPercent = 30;
+ const int kNackHistoryMs = 1000;
+
+ BuiltInNetworkBehaviorConfig GetSendTransportConfig() const override {
+ BuiltInNetworkBehaviorConfig pipe_config;
+ pipe_config.queue_delay_ms = kRttMs / 2;
+ pipe_config.loss_percent = kLossPercent;
+ return pipe_config;
+ }
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ ASSERT_EQ(receive_configs->size(), 1U);
+ (*receive_configs)[0].rtp.nack.rtp_history_ms = kNackHistoryMs;
+ AudioEndToEndTest::ModifyAudioConfigs(send_config, receive_configs);
+ }
+
+ void PerformTest() override { SleepMs(kTestDurationMs); }
+
+ void OnStreamsStopped() override {
+ AudioReceiveStreamInterface::Stats recv_stats =
+ receive_stream()->GetStats(/*get_and_clear_legacy_stats=*/true);
+ EXPECT_GT(recv_stats.nacks_sent, 0U);
+ AudioSendStream::Stats send_stats = send_stream()->GetStats();
+ EXPECT_GT(send_stats.retransmitted_packets_sent, 0U);
+ EXPECT_GT(send_stats.nacks_rcvd, 0U);
+ }
+ } test;
+
+ RunBaseTest(&test);
+}
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/non_sender_rtt_test.cc b/third_party/libwebrtc/audio/test/non_sender_rtt_test.cc
new file mode 100644
index 0000000000..0c7dc6cbee
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/non_sender_rtt_test.cc
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/test/audio_end_to_end_test.h"
+#include "system_wrappers/include/sleep.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace test {
+
+using NonSenderRttTest = CallTest;
+
+TEST_F(NonSenderRttTest, NonSenderRttStats) {
+ class NonSenderRttTest : public AudioEndToEndTest {
+ public:
+ const int kTestDurationMs = 10000;
+ const int64_t kRttMs = 30;
+
+ BuiltInNetworkBehaviorConfig GetSendTransportConfig() const override {
+ BuiltInNetworkBehaviorConfig pipe_config;
+ pipe_config.queue_delay_ms = kRttMs / 2;
+ return pipe_config;
+ }
+
+ void ModifyAudioConfigs(AudioSendStream::Config* send_config,
+ std::vector<AudioReceiveStreamInterface::Config>*
+ receive_configs) override {
+ ASSERT_EQ(receive_configs->size(), 1U);
+ (*receive_configs)[0].enable_non_sender_rtt = true;
+ AudioEndToEndTest::ModifyAudioConfigs(send_config, receive_configs);
+ send_config->send_codec_spec->enable_non_sender_rtt = true;
+ }
+
+ void PerformTest() override { SleepMs(kTestDurationMs); }
+
+ void OnStreamsStopped() override {
+ AudioReceiveStreamInterface::Stats recv_stats =
+ receive_stream()->GetStats(/*get_and_clear_legacy_stats=*/true);
+ EXPECT_GT(recv_stats.round_trip_time_measurements, 0);
+ ASSERT_TRUE(recv_stats.round_trip_time.has_value());
+ EXPECT_GT(recv_stats.round_trip_time->ms(), 0);
+ EXPECT_GE(recv_stats.total_round_trip_time.ms(),
+ recv_stats.round_trip_time->ms());
+ }
+ } test;
+
+ RunBaseTest(&test);
+}
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/pc_low_bandwidth_audio_test.cc b/third_party/libwebrtc/audio/test/pc_low_bandwidth_audio_test.cc
new file mode 100644
index 0000000000..8b733d578d
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/pc_low_bandwidth_audio_test.cc
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <memory>
+
+#include "absl/flags/declare.h"
+#include "absl/flags/flag.h"
+#include "absl/strings/string_view.h"
+#include "api/test/create_network_emulation_manager.h"
+#include "api/test/create_peerconnection_quality_test_fixture.h"
+#include "api/test/metrics/chrome_perf_dashboard_metrics_exporter.h"
+#include "api/test/metrics/global_metrics_logger_and_exporter.h"
+#include "api/test/metrics/metrics_exporter.h"
+#include "api/test/metrics/stdout_metrics_exporter.h"
+#include "api/test/network_emulation_manager.h"
+#include "api/test/pclf/media_configuration.h"
+#include "api/test/pclf/media_quality_test_params.h"
+#include "api/test/pclf/peer_configurer.h"
+#include "api/test/peerconnection_quality_test_fixture.h"
+#include "api/test/simulated_network.h"
+#include "api/test/time_controller.h"
+#include "call/simulated_network.h"
+#include "test/gtest.h"
+#include "test/pc/e2e/network_quality_metrics_reporter.h"
+#include "test/testsupport/file_utils.h"
+
+ABSL_DECLARE_FLAG(std::string, test_case_prefix);
+ABSL_DECLARE_FLAG(int, sample_rate_hz);
+ABSL_DECLARE_FLAG(bool, quick);
+
+namespace webrtc {
+namespace test {
+
+using ::webrtc::webrtc_pc_e2e::AudioConfig;
+using ::webrtc::webrtc_pc_e2e::PeerConfigurer;
+using ::webrtc::webrtc_pc_e2e::RunParams;
+
+namespace {
+
+constexpr int kTestDurationMs = 5400;
+constexpr int kQuickTestDurationMs = 100;
+
+std::string GetMetricTestCaseName() {
+ const ::testing::TestInfo* const test_info =
+ ::testing::UnitTest::GetInstance()->current_test_info();
+ std::string test_case_prefix(absl::GetFlag(FLAGS_test_case_prefix));
+ if (test_case_prefix.empty()) {
+ return test_info->name();
+ }
+ return test_case_prefix + "_" + test_info->name();
+}
+
+std::unique_ptr<webrtc_pc_e2e::PeerConnectionE2EQualityTestFixture>
+CreateTestFixture(absl::string_view test_case_name,
+ TimeController& time_controller,
+ std::pair<EmulatedNetworkManagerInterface*,
+ EmulatedNetworkManagerInterface*> network_links,
+ rtc::FunctionView<void(PeerConfigurer*)> alice_configurer,
+ rtc::FunctionView<void(PeerConfigurer*)> bob_configurer) {
+ auto fixture = webrtc_pc_e2e::CreatePeerConnectionE2EQualityTestFixture(
+ std::string(test_case_name), time_controller,
+ /*audio_quality_analyzer=*/nullptr,
+ /*video_quality_analyzer=*/nullptr);
+ auto alice = std::make_unique<PeerConfigurer>(
+ network_links.first->network_dependencies());
+ auto bob = std::make_unique<PeerConfigurer>(
+ network_links.second->network_dependencies());
+ alice_configurer(alice.get());
+ bob_configurer(bob.get());
+ fixture->AddPeer(std::move(alice));
+ fixture->AddPeer(std::move(bob));
+ fixture->AddQualityMetricsReporter(
+ std::make_unique<webrtc_pc_e2e::NetworkQualityMetricsReporter>(
+ network_links.first, network_links.second,
+ test::GetGlobalMetricsLogger()));
+ return fixture;
+}
+
+std::string FileSampleRateSuffix() {
+ return std::to_string(absl::GetFlag(FLAGS_sample_rate_hz) / 1000);
+}
+
+std::string AudioInputFile() {
+ return test::ResourcePath("voice_engine/audio_tiny" + FileSampleRateSuffix(),
+ "wav");
+}
+
+std::string AudioOutputFile() {
+ const ::testing::TestInfo* const test_info =
+ ::testing::UnitTest::GetInstance()->current_test_info();
+ return webrtc::test::OutputPath() + "PCLowBandwidth_" + test_info->name() +
+ "_" + FileSampleRateSuffix() + ".wav";
+}
+
+std::string PerfResultsOutputFile() {
+ return webrtc::test::OutputPath() + "PCLowBandwidth_perf_" +
+ FileSampleRateSuffix() + ".pb";
+}
+
+void LogTestResults() {
+ std::string perf_results_output_file = PerfResultsOutputFile();
+ std::vector<std::unique_ptr<MetricsExporter>> exporters;
+ exporters.push_back(std::make_unique<StdoutMetricsExporter>());
+ exporters.push_back(std::make_unique<ChromePerfDashboardMetricsExporter>(
+ perf_results_output_file));
+ EXPECT_TRUE(
+ ExportPerfMetric(*GetGlobalMetricsLogger(), std::move(exporters)));
+
+ const ::testing::TestInfo* const test_info =
+ ::testing::UnitTest::GetInstance()->current_test_info();
+
+ // Output information about the input and output audio files so that further
+ // processing can be done by an external process.
+ printf("TEST %s %s %s %s\n", test_info->name(), AudioInputFile().c_str(),
+ AudioOutputFile().c_str(), perf_results_output_file.c_str());
+}
+
+} // namespace
+
+TEST(PCLowBandwidthAudioTest, PCGoodNetworkHighBitrate) {
+ std::unique_ptr<NetworkEmulationManager> network_emulation_manager =
+ CreateNetworkEmulationManager();
+ auto fixture = CreateTestFixture(
+ GetMetricTestCaseName(), *network_emulation_manager->time_controller(),
+ network_emulation_manager->CreateEndpointPairWithTwoWayRoutes(
+ BuiltInNetworkBehaviorConfig()),
+ [](PeerConfigurer* alice) {
+ AudioConfig audio;
+ audio.stream_label = "alice-audio";
+ audio.mode = AudioConfig::Mode::kFile;
+ audio.input_file_name = AudioInputFile();
+ audio.output_dump_file_name = AudioOutputFile();
+ audio.sampling_frequency_in_hz = absl::GetFlag(FLAGS_sample_rate_hz);
+ alice->SetAudioConfig(std::move(audio));
+ },
+ [](PeerConfigurer* bob) {});
+ fixture->Run(RunParams(TimeDelta::Millis(
+ absl::GetFlag(FLAGS_quick) ? kQuickTestDurationMs : kTestDurationMs)));
+ LogTestResults();
+}
+
+TEST(PCLowBandwidthAudioTest, PC40kbpsNetwork) {
+ std::unique_ptr<NetworkEmulationManager> network_emulation_manager =
+ CreateNetworkEmulationManager();
+ BuiltInNetworkBehaviorConfig config;
+ config.link_capacity_kbps = 40;
+ config.queue_length_packets = 1500;
+ config.queue_delay_ms = 400;
+ config.loss_percent = 1;
+ auto fixture = CreateTestFixture(
+ GetMetricTestCaseName(), *network_emulation_manager->time_controller(),
+ network_emulation_manager->CreateEndpointPairWithTwoWayRoutes(config),
+ [](PeerConfigurer* alice) {
+ AudioConfig audio;
+ audio.stream_label = "alice-audio";
+ audio.mode = AudioConfig::Mode::kFile;
+ audio.input_file_name = AudioInputFile();
+ audio.output_dump_file_name = AudioOutputFile();
+ audio.sampling_frequency_in_hz = absl::GetFlag(FLAGS_sample_rate_hz);
+ alice->SetAudioConfig(std::move(audio));
+ },
+ [](PeerConfigurer* bob) {});
+ fixture->Run(RunParams(TimeDelta::Millis(
+ absl::GetFlag(FLAGS_quick) ? kQuickTestDurationMs : kTestDurationMs)));
+ LogTestResults();
+}
+
+} // namespace test
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/test/unittests/low_bandwidth_audio_test_test.py b/third_party/libwebrtc/audio/test/unittests/low_bandwidth_audio_test_test.py
new file mode 100755
index 0000000000..be72fcbfdd
--- /dev/null
+++ b/third_party/libwebrtc/audio/test/unittests/low_bandwidth_audio_test_test.py
@@ -0,0 +1,239 @@
+#!/usr/bin/env python3
+# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS. All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+from __future__ import absolute_import
+import os
+import unittest
+import sys
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+PARENT_DIR = os.path.join(SCRIPT_DIR, os.pardir)
+sys.path.append(PARENT_DIR)
+import low_bandwidth_audio_test
+
+
+class TestExtractTestRuns(unittest.TestCase):
+ def _TestLog(self, log, *expected):
+ self.assertEqual(
+ tuple(low_bandwidth_audio_test.ExtractTestRuns(log.splitlines(True))),
+ expected)
+
+ def testLinux(self):
+ self._TestLog(
+ LINUX_LOG,
+ (None, 'GoodNetworkHighBitrate',
+ '/webrtc/src/resources/voice_engine/audio_tiny16.wav',
+ '/webrtc/src/out/LowBandwidth_GoodNetworkHighBitrate.wav', None),
+ (None, 'Mobile2GNetwork',
+ '/webrtc/src/resources/voice_engine/audio_tiny16.wav',
+ '/webrtc/src/out/LowBandwidth_Mobile2GNetwork.wav', None),
+ (None, 'PCGoodNetworkHighBitrate',
+ '/webrtc/src/resources/voice_engine/audio_tiny16.wav',
+ '/webrtc/src/out/PCLowBandwidth_PCGoodNetworkHighBitrate.wav',
+ '/webrtc/src/out/PCLowBandwidth_perf_48.json'),
+ (None, 'PCMobile2GNetwork',
+ '/webrtc/src/resources/voice_engine/audio_tiny16.wav',
+ '/webrtc/src/out/PCLowBandwidth_PCMobile2GNetwork.wav',
+ '/webrtc/src/out/PCLowBandwidth_perf_48.json'))
+
+ def testAndroid(self):
+ self._TestLog(
+ ANDROID_LOG,
+ ('ddfa6149', 'Mobile2GNetwork',
+ '/sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav',
+ '/sdcard/chromium_tests_root/LowBandwidth_Mobile2GNetwork.wav', None),
+ ('TA99205CNO', 'GoodNetworkHighBitrate',
+ '/sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav',
+ '/sdcard/chromium_tests_root/LowBandwidth_GoodNetworkHighBitrate.wav',
+ None),
+ ('ddfa6149', 'PCMobile2GNetwork',
+ '/sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav',
+ '/sdcard/chromium_tests_root/PCLowBandwidth_PCMobile2GNetwork.wav',
+ '/sdcard/chromium_tests_root/PCLowBandwidth_perf_48.json'),
+ ('TA99205CNO', 'PCGoodNetworkHighBitrate',
+ '/sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav',
+ ('/sdcard/chromium_tests_root/'
+ 'PCLowBandwidth_PCGoodNetworkHighBitrate.wav'),
+ '/sdcard/chromium_tests_root/PCLowBandwidth_perf_48.json'))
+
+
+LINUX_LOG = r'''\
+[==========] Running 2 tests from 1 test case.
+[----------] Global test environment set-up.
+[----------] 2 tests from LowBandwidthAudioTest
+[ RUN ] LowBandwidthAudioTest.GoodNetworkHighBitrate
+TEST GoodNetworkHighBitrate /webrtc/src/resources/voice_engine/audio_tiny16.wav /webrtc/src/out/LowBandwidth_GoodNetworkHighBitrate.wav
+[ OK ] LowBandwidthAudioTest.GoodNetworkHighBitrate (5932 ms)
+[ RUN ] LowBandwidthAudioTest.Mobile2GNetwork
+TEST Mobile2GNetwork /webrtc/src/resources/voice_engine/audio_tiny16.wav /webrtc/src/out/LowBandwidth_Mobile2GNetwork.wav
+[ OK ] LowBandwidthAudioTest.Mobile2GNetwork (6333 ms)
+[----------] 2 tests from LowBandwidthAudioTest (12265 ms total)
+[----------] 2 tests from PCLowBandwidthAudioTest
+[ RUN ] PCLowBandwidthAudioTest.PCGoodNetworkHighBitrate
+TEST PCGoodNetworkHighBitrate /webrtc/src/resources/voice_engine/audio_tiny16.wav /webrtc/src/out/PCLowBandwidth_PCGoodNetworkHighBitrate.wav /webrtc/src/out/PCLowBandwidth_perf_48.json
+[ OK ] PCLowBandwidthAudioTest.PCGoodNetworkHighBitrate (5932 ms)
+[ RUN ] PCLowBandwidthAudioTest.PCMobile2GNetwork
+TEST PCMobile2GNetwork /webrtc/src/resources/voice_engine/audio_tiny16.wav /webrtc/src/out/PCLowBandwidth_PCMobile2GNetwork.wav /webrtc/src/out/PCLowBandwidth_perf_48.json
+[ OK ] PCLowBandwidthAudioTest.PCMobile2GNetwork (6333 ms)
+[----------] 2 tests from PCLowBandwidthAudioTest (12265 ms total)
+
+[----------] Global test environment tear-down
+[==========] 2 tests from 1 test case ran. (12266 ms total)
+[ PASSED ] 2 tests.
+'''
+
+ANDROID_LOG = r'''\
+I 0.000s Main command: /webrtc/src/build/android/test_runner.py gtest --suite low_bandwidth_audio_test --output-directory /webrtc/src/out/debug-android --runtime-deps-path /webrtc/src/out/debug-android/gen.runtime/webrtc/audio/low_bandwidth_audio_test__test_runner_script.runtime_deps -v
+I 0.007s Main [host]> /webrtc/src/third_party/android_sdk/public/build-tools/24.0.2/aapt dump xmltree /webrtc/src/out/debug-android/low_bandwidth_audio_test_apk/low_bandwidth_audio_test-debug.apk AndroidManifest.xml
+I 0.028s TimeoutThread-1-for-MainThread [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb devices
+I 0.062s TimeoutThread-1-for-prepare_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO wait-for-device
+I 0.063s TimeoutThread-1-for-prepare_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 wait-for-device
+I 0.102s TimeoutThread-1-for-prepare_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( ( c=/data/local/tmp/cache_token;echo $EXTERNAL_STORAGE;cat $c 2>/dev/null||echo;echo "77611072-160c-11d7-9362-705b0f464195">$c &&getprop )>/data/local/tmp/temp_file-5ea34389e3f92 );echo %$?'
+I 0.105s TimeoutThread-1-for-prepare_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( ( c=/data/local/tmp/cache_token;echo $EXTERNAL_STORAGE;cat $c 2>/dev/null||echo;echo "77618afc-160c-11d7-bda4-705b0f464195">$c &&getprop )>/data/local/tmp/temp_file-b995cef6e0e3d );echo %$?'
+I 0.204s TimeoutThread-1-for-prepare_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 pull /data/local/tmp/temp_file-b995cef6e0e3d /tmp/tmpieAgDj/tmp_ReadFileWithPull
+I 0.285s TimeoutThread-1-for-prepare_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( test -d /storage/emulated/legacy );echo %$?'
+I 0.285s TimeoutThread-1-for-delete_temporary_file(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell 'rm -f /data/local/tmp/temp_file-b995cef6e0e3d'
+I 0.302s TimeoutThread-1-for-prepare_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO pull /data/local/tmp/temp_file-5ea34389e3f92 /tmp/tmpvlyG3I/tmp_ReadFileWithPull
+I 0.352s TimeoutThread-1-for-prepare_device(ddfa6149) condition 'sd_card_ready' met (0.3s)
+I 0.353s TimeoutThread-1-for-prepare_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( pm path android );echo %$?'
+I 0.369s TimeoutThread-1-for-prepare_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( test -d /sdcard );echo %$?'
+I 0.370s TimeoutThread-1-for-delete_temporary_file(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell 'rm -f /data/local/tmp/temp_file-5ea34389e3f92'
+I 0.434s TimeoutThread-1-for-prepare_device(TA99205CNO) condition 'sd_card_ready' met (0.4s)
+I 0.434s TimeoutThread-1-for-prepare_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( pm path android );echo %$?'
+I 1.067s TimeoutThread-1-for-prepare_device(ddfa6149) condition 'pm_ready' met (1.0s)
+I 1.067s TimeoutThread-1-for-prepare_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( getprop sys.boot_completed );echo %$?'
+I 1.115s TimeoutThread-1-for-prepare_device(ddfa6149) condition 'boot_completed' met (1.1s)
+I 1.181s TimeoutThread-1-for-prepare_device(TA99205CNO) condition 'pm_ready' met (1.1s)
+I 1.181s TimeoutThread-1-for-prepare_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( getprop sys.boot_completed );echo %$?'
+I 1.242s TimeoutThread-1-for-prepare_device(TA99205CNO) condition 'boot_completed' met (1.2s)
+I 1.268s TimeoutThread-1-for-individual_device_set_up(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( pm path org.chromium.native_test );echo %$?'
+I 1.269s TimeoutThread-1-for-individual_device_set_up(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( pm path org.chromium.native_test );echo %$?'
+I 2.008s calculate_device_checksums [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( a=/data/local/tmp/md5sum/md5sum_bin;! [[ $(ls -l $a) = *1225256* ]]&&exit 2;export LD_LIBRARY_PATH=/data/local/tmp/md5sum;$a /data/app/org.chromium.native_test-2/base.apk;: );echo %$?'
+I 2.008s calculate_host_checksums [host]> /webrtc/src/out/debug-android/md5sum_bin_host /webrtc/src/out/debug-android/low_bandwidth_audio_test_apk/low_bandwidth_audio_test-debug.apk
+I 2.019s calculate_device_checksums [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( a=/data/local/tmp/md5sum/md5sum_bin;! [[ $(ls -l $a) = *1225256* ]]&&exit 2;export LD_LIBRARY_PATH=/data/local/tmp/md5sum;$a /data/app/org.chromium.native_test-1/base.apk;: );echo %$?'
+I 2.020s calculate_host_checksums [host]> /webrtc/src/out/debug-android/md5sum_bin_host /webrtc/src/out/debug-android/low_bandwidth_audio_test_apk/low_bandwidth_audio_test-debug.apk
+I 2.172s TimeoutThread-1-for-individual_device_set_up(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( p=org.chromium.native_test;if [[ "$(ps)" = *$p* ]]; then am force-stop $p; fi );echo %$?'
+I 2.183s TimeoutThread-1-for-individual_device_set_up(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( p=org.chromium.native_test;if [[ "$(ps)" = *$p* ]]; then am force-stop $p; fi );echo %$?'
+I 2.290s calculate_device_checksums [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( a=/data/local/tmp/md5sum/md5sum_bin;! [[ $(ls -l $a) = *1225256* ]]&&exit 2;export LD_LIBRARY_PATH=/data/local/tmp/md5sum;$a /sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav;: );echo %$?'
+I 2.291s calculate_host_checksums [host]> /webrtc/src/out/debug-android/md5sum_bin_host /webrtc/src/resources/voice_engine/audio_tiny16.wav
+I 2.373s calculate_device_checksums [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( a=/data/local/tmp/md5sum/md5sum_bin;! [[ $(ls -l $a) = *1225256* ]]&&exit 2;export LD_LIBRARY_PATH=/data/local/tmp/md5sum;$a /storage/emulated/legacy/chromium_tests_root/resources/voice_engine/audio_tiny16.wav;: );echo %$?'
+I 2.374s calculate_host_checksums [host]> /webrtc/src/out/debug-android/md5sum_bin_host /webrtc/src/resources/voice_engine/audio_tiny16.wav
+I 2.390s calculate_device_checksums [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( a=/data/local/tmp/md5sum/md5sum_bin;! [[ $(ls -l $a) = *1225256* ]]&&exit 2;export LD_LIBRARY_PATH=/data/local/tmp/md5sum;$a /sdcard/chromium_tests_root/icudtl.dat;: );echo %$?'
+I 2.390s calculate_host_checksums [host]> /webrtc/src/out/debug-android/md5sum_bin_host /webrtc/src/out/debug-android/icudtl.dat
+I 2.472s calculate_device_checksums [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( a=/data/local/tmp/md5sum/md5sum_bin;! [[ $(ls -l $a) = *1225256* ]]&&exit 2;export LD_LIBRARY_PATH=/data/local/tmp/md5sum;$a /storage/emulated/legacy/chromium_tests_root/icudtl.dat;: );echo %$?'
+I 2.472s calculate_host_checksums [host]> /webrtc/src/out/debug-android/md5sum_bin_host /webrtc/src/out/debug-android/icudtl.dat
+I 2.675s TimeoutThread-1-for-list_tests(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( ( p=org.chromium.native_test;am instrument -w -e "$p".NativeTestInstrumentationTestRunner.ShardNanoTimeout 30000000000 -e "$p".NativeTestInstrumentationTestRunner.NativeTestActivity "$p".NativeUnitTestActivity -e "$p".NativeTestInstrumentationTestRunner.StdoutFile /sdcard/temp_file-6407c967884af.gtest_out -e "$p".NativeTest.CommandLineFlags --gtest_list_tests "$p"/"$p".NativeTestInstrumentationTestRunner )>/data/local/tmp/temp_file-d21ebcd0977d9 );echo %$?'
+I 2.675s TimeoutThread-1-for-list_tests(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( ( p=org.chromium.native_test;am instrument -w -e "$p".NativeTestInstrumentationTestRunner.ShardNanoTimeout 30000000000 -e "$p".NativeTestInstrumentationTestRunner.NativeTestActivity "$p".NativeUnitTestActivity -e "$p".NativeTestInstrumentationTestRunner.StdoutFile /storage/emulated/legacy/temp_file-fa09560c3259.gtest_out -e "$p".NativeTest.CommandLineFlags --gtest_list_tests "$p"/"$p".NativeTestInstrumentationTestRunner )>/data/local/tmp/temp_file-95ad995999939 );echo %$?'
+I 3.739s TimeoutThread-1-for-list_tests(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 pull /data/local/tmp/temp_file-95ad995999939 /tmp/tmpSnnF6Y/tmp_ReadFileWithPull
+I 3.807s TimeoutThread-1-for-delete_temporary_file(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell 'rm -f /data/local/tmp/temp_file-95ad995999939'
+I 3.812s TimeoutThread-1-for-list_tests(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( TZ=utc ls -a -l /storage/emulated/legacy/ );echo %$?'
+I 3.866s TimeoutThread-1-for-list_tests(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( cat /storage/emulated/legacy/temp_file-fa09560c3259.gtest_out );echo %$?'
+I 3.912s TimeoutThread-1-for-delete_temporary_file(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell 'rm -f /storage/emulated/legacy/temp_file-fa09560c3259.gtest_out'
+I 4.256s TimeoutThread-1-for-list_tests(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO pull /data/local/tmp/temp_file-d21ebcd0977d9 /tmp/tmpokPF5b/tmp_ReadFileWithPull
+I 4.324s TimeoutThread-1-for-delete_temporary_file(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell 'rm -f /data/local/tmp/temp_file-d21ebcd0977d9'
+I 4.342s TimeoutThread-1-for-list_tests(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( TZ=utc ls -a -l /sdcard/ );echo %$?'
+I 4.432s TimeoutThread-1-for-list_tests(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( cat /sdcard/temp_file-6407c967884af.gtest_out );echo %$?'
+I 4.476s TimeoutThread-1-for-delete_temporary_file(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell 'rm -f /sdcard/temp_file-6407c967884af.gtest_out'
+I 4.483s Main Using external sharding settings. This is shard 0/1
+I 4.483s Main STARTING TRY #1/3
+I 4.484s Main Will run 2 tests on 2 devices: TA99205CNO, ddfa6149
+I 4.486s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( pm dump org.chromium.native_test | grep dataDir=; echo "PIPESTATUS: ${PIPESTATUS[@]}" );echo %$?'
+I 4.486s TimeoutThread-1-for-run_tests_on_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( pm dump org.chromium.native_test | grep dataDir=; echo "PIPESTATUS: ${PIPESTATUS[@]}" );echo %$?'
+I 5.551s run_tests_on_device(TA99205CNO) flags:
+I 5.552s run_tests_on_device(ddfa6149) flags:
+I 5.554s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( ( p=org.chromium.native_test;am instrument -w -e "$p".NativeTestInstrumentationTestRunner.ShardNanoTimeout 120000000000 -e "$p".NativeTestInstrumentationTestRunner.NativeTestActivity "$p".NativeUnitTestActivity -e "$p".NativeTestInstrumentationTestRunner.Test LowBandwidthAudioTest.GoodNetworkHighBitrate -e "$p".NativeTestInstrumentationTestRunner.StdoutFile /sdcard/temp_file-ffe7b76691cb7.gtest_out "$p"/"$p".NativeTestInstrumentationTestRunner )>/data/local/tmp/temp_file-c9d83b3078ab1 );echo %$?'
+I 5.556s TimeoutThread-1-for-run_tests_on_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( ( p=org.chromium.native_test;am instrument -w -e "$p".NativeTestInstrumentationTestRunner.ShardNanoTimeout 120000000000 -e "$p".NativeTestInstrumentationTestRunner.NativeTestActivity "$p".NativeUnitTestActivity -e "$p".NativeTestInstrumentationTestRunner.Test LowBandwidthAudioTest.Mobile2GNetwork -e "$p".NativeTestInstrumentationTestRunner.StdoutFile /storage/emulated/legacy/temp_file-f0ceb1a05ea8.gtest_out "$p"/"$p".NativeTestInstrumentationTestRunner )>/data/local/tmp/temp_file-245ef307a5b32 );echo %$?'
+I 12.956s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO pull /data/local/tmp/temp_file-c9d83b3078ab1 /tmp/tmpRQhTcM/tmp_ReadFileWithPull
+I 13.024s TimeoutThread-1-for-delete_temporary_file(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell 'rm -f /data/local/tmp/temp_file-c9d83b3078ab1'
+I 13.032s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( TZ=utc ls -a -l /sdcard/ );echo %$?'
+I 13.114s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( cat /sdcard/temp_file-ffe7b76691cb7.gtest_out );echo %$?'
+I 13.154s TimeoutThread-1-for-run_tests_on_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 pull /data/local/tmp/temp_file-245ef307a5b32 /tmp/tmpfQ4J96/tmp_ReadFileWithPull
+I 13.167s TimeoutThread-1-for-delete_temporary_file(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell 'rm -f /sdcard/temp_file-ffe7b76691cb7.gtest_out'
+I 13.169s TimeoutThread-1-for-delete_temporary_file(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell 'rm -f /data/user/0/org.chromium.native_test/temp_file-f07c4808dbf8f.xml'
+I 13.170s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( pm clear org.chromium.native_test );echo %$?'
+I 13.234s TimeoutThread-1-for-delete_temporary_file(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell 'rm -f /data/local/tmp/temp_file-245ef307a5b32'
+I 13.239s TimeoutThread-1-for-run_tests_on_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( TZ=utc ls -a -l /storage/emulated/legacy/ );echo %$?'
+I 13.291s TimeoutThread-1-for-run_tests_on_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( cat /storage/emulated/legacy/temp_file-f0ceb1a05ea8.gtest_out );echo %$?'
+I 13.341s TimeoutThread-1-for-delete_temporary_file(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell 'rm -f /storage/emulated/legacy/temp_file-f0ceb1a05ea8.gtest_out'
+I 13.343s TimeoutThread-1-for-delete_temporary_file(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell 'rm -f /data/data/org.chromium.native_test/temp_file-5649bb01682da.xml'
+I 13.346s TimeoutThread-1-for-run_tests_on_device(ddfa6149) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s ddfa6149 shell '( pm clear org.chromium.native_test );echo %$?'
+I 13.971s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) Setting permissions for org.chromium.native_test.
+I 13.971s TimeoutThread-1-for-run_tests_on_device(TA99205CNO) [host]> /webrtc/src/third_party/android_sdk/public/platform-tools/adb -s TA99205CNO shell '( pm grant org.chromium.native_test android.permission.CAMERA&&pm grant org.chromium.native_test android.permission.RECORD_AUDIO&&pm grant org.chromium.native_test android.permission.WRITE_EXTERNAL_STORAGE&&pm grant org.chromium.native_test android.permission.READ_EXTERNAL_STORAGE );echo %$?'
+I 14.078s run_tests_on_device(ddfa6149) >>ScopedMainEntryLogger
+I 14.078s run_tests_on_device(ddfa6149) Note: Google Test filter = LowBandwidthAudioTest.Mobile2GNetwork
+I 14.078s run_tests_on_device(ddfa6149) [==========] Running 1 test from 1 test case.
+I 14.078s run_tests_on_device(ddfa6149) [----------] Global test environment set-up.
+I 14.078s run_tests_on_device(ddfa6149) [----------] 1 test from LowBandwidthAudioTest
+I 14.078s run_tests_on_device(ddfa6149) [ RUN ] LowBandwidthAudioTest.Mobile2GNetwork
+I 14.078s run_tests_on_device(ddfa6149) TEST Mobile2GNetwork /sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav /sdcard/chromium_tests_root/LowBandwidth_Mobile2GNetwork.wav
+I 14.078s run_tests_on_device(ddfa6149) [ OK ] LowBandwidthAudioTest.Mobile2GNetwork (6438 ms)
+I 14.078s run_tests_on_device(ddfa6149) [----------] 1 test from LowBandwidthAudioTest (6438 ms total)
+I 14.078s run_tests_on_device(ddfa6149)
+I 14.078s run_tests_on_device(ddfa6149) [----------] Global test environment tear-down
+I 14.079s run_tests_on_device(ddfa6149) [==========] 1 test from 1 test case ran. (6438 ms total)
+I 14.079s run_tests_on_device(ddfa6149) [ PASSED ] 1 test.
+I 14.079s run_tests_on_device(ddfa6149) <<ScopedMainEntryLogger
+I 16.576s run_tests_on_device(TA99205CNO) >>ScopedMainEntryLogger
+I 16.576s run_tests_on_device(TA99205CNO) Note: Google Test filter = LowBandwidthAudioTest.GoodNetworkHighBitrate
+I 16.576s run_tests_on_device(TA99205CNO) [==========] Running 1 test from 1 test case.
+I 16.576s run_tests_on_device(TA99205CNO) [----------] Global test environment set-up.
+I 16.576s run_tests_on_device(TA99205CNO) [----------] 1 test from LowBandwidthAudioTest
+I 16.576s run_tests_on_device(TA99205CNO) [ RUN ] LowBandwidthAudioTest.GoodNetworkHighBitrate
+I 16.576s run_tests_on_device(TA99205CNO) TEST GoodNetworkHighBitrate /sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav /sdcard/chromium_tests_root/LowBandwidth_GoodNetworkHighBitrate.wav
+I 16.576s run_tests_on_device(TA99205CNO) [ OK ] LowBandwidthAudioTest.GoodNetworkHighBitrate (5968 ms)
+I 16.576s run_tests_on_device(TA99205CNO) [----------] 1 test from LowBandwidthAudioTest (5968 ms total)
+I 16.576s run_tests_on_device(TA99205CNO)
+I 16.576s run_tests_on_device(TA99205CNO) [----------] Global test environment tear-down
+I 16.576s run_tests_on_device(TA99205CNO) [==========] 1 test from 1 test case ran. (5968 ms total)
+I 16.577s run_tests_on_device(TA99205CNO) [ PASSED ] 1 test.
+I 16.577s run_tests_on_device(TA99205CNO) <<ScopedMainEntryLogger
+I 14.078s run_tests_on_device(ddfa6149) >>ScopedMainEntryLogger
+I 14.078s run_tests_on_device(ddfa6149) Note: Google Test filter = PCLowBandwidthAudioTest.PCMobile2GNetwork
+I 14.078s run_tests_on_device(ddfa6149) [==========] Running 1 test from 1 test case.
+I 14.078s run_tests_on_device(ddfa6149) [----------] Global test environment set-up.
+I 14.078s run_tests_on_device(ddfa6149) [----------] 1 test from PCLowBandwidthAudioTest
+I 14.078s run_tests_on_device(ddfa6149) [ RUN ] PCLowBandwidthAudioTest.PCMobile2GNetwork
+I 14.078s run_tests_on_device(ddfa6149) TEST PCMobile2GNetwork /sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav /sdcard/chromium_tests_root/PCLowBandwidth_PCMobile2GNetwork.wav /sdcard/chromium_tests_root/PCLowBandwidth_perf_48.json
+I 14.078s run_tests_on_device(ddfa6149) [ OK ] PCLowBandwidthAudioTest.PCMobile2GNetwork (6438 ms)
+I 14.078s run_tests_on_device(ddfa6149) [----------] 1 test from PCLowBandwidthAudioTest (6438 ms total)
+I 14.078s run_tests_on_device(ddfa6149)
+I 14.078s run_tests_on_device(ddfa6149) [----------] Global test environment tear-down
+I 14.079s run_tests_on_device(ddfa6149) [==========] 1 test from 1 test case ran. (6438 ms total)
+I 14.079s run_tests_on_device(ddfa6149) [ PASSED ] 1 test.
+I 14.079s run_tests_on_device(ddfa6149) <<ScopedMainEntryLogger
+I 16.576s run_tests_on_device(TA99205CNO) >>ScopedMainEntryLogger
+I 16.576s run_tests_on_device(TA99205CNO) Note: Google Test filter = PCLowBandwidthAudioTest.PCGoodNetworkHighBitrate
+I 16.576s run_tests_on_device(TA99205CNO) [==========] Running 1 test from 1 test case.
+I 16.576s run_tests_on_device(TA99205CNO) [----------] Global test environment set-up.
+I 16.576s run_tests_on_device(TA99205CNO) [----------] 1 test from PCLowBandwidthAudioTest
+I 16.576s run_tests_on_device(TA99205CNO) [ RUN ] PCLowBandwidthAudioTest.PCGoodNetworkHighBitrate
+I 16.576s run_tests_on_device(TA99205CNO) TEST PCGoodNetworkHighBitrate /sdcard/chromium_tests_root/resources/voice_engine/audio_tiny16.wav /sdcard/chromium_tests_root/PCLowBandwidth_PCGoodNetworkHighBitrate.wav /sdcard/chromium_tests_root/PCLowBandwidth_perf_48.json
+I 16.576s run_tests_on_device(TA99205CNO) [ OK ] PCLowBandwidthAudioTest.PCGoodNetworkHighBitrate (5968 ms)
+I 16.576s run_tests_on_device(TA99205CNO) [----------] 1 test from PCLowBandwidthAudioTest (5968 ms total)
+I 16.576s run_tests_on_device(TA99205CNO)
+I 16.576s run_tests_on_device(TA99205CNO) [----------] Global test environment tear-down
+I 16.576s run_tests_on_device(TA99205CNO) [==========] 1 test from 1 test case ran. (5968 ms total)
+I 16.577s run_tests_on_device(TA99205CNO) [ PASSED ] 1 test.
+I 16.577s run_tests_on_device(TA99205CNO) <<ScopedMainEntryLogger
+I 16.577s run_tests_on_device(TA99205CNO) Finished running tests on this device.
+I 16.577s run_tests_on_device(ddfa6149) Finished running tests on this device.
+I 16.604s Main FINISHED TRY #1/3
+I 16.604s Main All tests completed.
+C 16.604s Main ********************************************************************************
+C 16.604s Main Summary
+C 16.604s Main ********************************************************************************
+C 16.605s Main [==========] 2 tests ran.
+C 16.605s Main [ PASSED ] 2 tests.
+C 16.605s Main ********************************************************************************
+I 16.608s tear_down_device(ddfa6149) Wrote device cache: /webrtc/src/out/debug-android/device_cache_ddea6549.json
+I 16.608s tear_down_device(TA99205CNO) Wrote device cache: /webrtc/src/out/debug-android/device_cache_TA99305CMO.json
+'''
+
+if __name__ == "__main__":
+ unittest.main()
diff --git a/third_party/libwebrtc/audio/utility/BUILD.gn b/third_party/libwebrtc/audio/utility/BUILD.gn
new file mode 100644
index 0000000000..983b6286e4
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/BUILD.gn
@@ -0,0 +1,56 @@
+# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS. All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+import("../../webrtc.gni")
+
+group("utility") {
+ deps = [ ":audio_frame_operations" ]
+}
+
+rtc_library("audio_frame_operations") {
+ visibility = [ "*" ]
+ sources = [
+ "audio_frame_operations.cc",
+ "audio_frame_operations.h",
+ "channel_mixer.cc",
+ "channel_mixer.h",
+ "channel_mixing_matrix.cc",
+ "channel_mixing_matrix.h",
+ ]
+
+ deps = [
+ "../../api/audio:audio_frame_api",
+ "../../common_audio",
+ "../../rtc_base:checks",
+ "../../rtc_base:logging",
+ "../../rtc_base:safe_conversions",
+ "../../system_wrappers:field_trial",
+ ]
+ absl_deps = [ "//third_party/abseil-cpp/absl/base:core_headers" ]
+}
+
+if (rtc_include_tests) {
+ rtc_library("utility_tests") {
+ testonly = true
+ sources = [
+ "audio_frame_operations_unittest.cc",
+ "channel_mixer_unittest.cc",
+ "channel_mixing_matrix_unittest.cc",
+ ]
+ deps = [
+ ":audio_frame_operations",
+ "../../api/audio:audio_frame_api",
+ "../../rtc_base:checks",
+ "../../rtc_base:logging",
+ "../../rtc_base:macromagic",
+ "../../rtc_base:stringutils",
+ "../../test:field_trial",
+ "../../test:test_support",
+ "//testing/gtest",
+ ]
+ }
+}
diff --git a/third_party/libwebrtc/audio/utility/audio_frame_operations.cc b/third_party/libwebrtc/audio/utility/audio_frame_operations.cc
new file mode 100644
index 0000000000..1b936c239b
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/audio_frame_operations.cc
@@ -0,0 +1,294 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/utility/audio_frame_operations.h"
+
+#include <string.h>
+
+#include <algorithm>
+#include <cstdint>
+#include <utility>
+
+#include "common_audio/include/audio_util.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/numerics/safe_conversions.h"
+
+namespace webrtc {
+namespace {
+
+// 2.7ms @ 48kHz, 4ms @ 32kHz, 8ms @ 16kHz.
+const size_t kMuteFadeFrames = 128;
+const float kMuteFadeInc = 1.0f / kMuteFadeFrames;
+
+} // namespace
+
+void AudioFrameOperations::Add(const AudioFrame& frame_to_add,
+ AudioFrame* result_frame) {
+ // Sanity check.
+ RTC_DCHECK(result_frame);
+ RTC_DCHECK_GT(result_frame->num_channels_, 0);
+ RTC_DCHECK_EQ(result_frame->num_channels_, frame_to_add.num_channels_);
+
+ bool no_previous_data = result_frame->muted();
+ if (result_frame->samples_per_channel_ != frame_to_add.samples_per_channel_) {
+ // Special case we have no data to start with.
+ RTC_DCHECK_EQ(result_frame->samples_per_channel_, 0);
+ result_frame->samples_per_channel_ = frame_to_add.samples_per_channel_;
+ no_previous_data = true;
+ }
+
+ if (result_frame->vad_activity_ == AudioFrame::kVadActive ||
+ frame_to_add.vad_activity_ == AudioFrame::kVadActive) {
+ result_frame->vad_activity_ = AudioFrame::kVadActive;
+ } else if (result_frame->vad_activity_ == AudioFrame::kVadUnknown ||
+ frame_to_add.vad_activity_ == AudioFrame::kVadUnknown) {
+ result_frame->vad_activity_ = AudioFrame::kVadUnknown;
+ }
+
+ if (result_frame->speech_type_ != frame_to_add.speech_type_)
+ result_frame->speech_type_ = AudioFrame::kUndefined;
+
+ if (!frame_to_add.muted()) {
+ const int16_t* in_data = frame_to_add.data();
+ int16_t* out_data = result_frame->mutable_data();
+ size_t length =
+ frame_to_add.samples_per_channel_ * frame_to_add.num_channels_;
+ if (no_previous_data) {
+ std::copy(in_data, in_data + length, out_data);
+ } else {
+ for (size_t i = 0; i < length; i++) {
+ const int32_t wrap_guard = static_cast<int32_t>(out_data[i]) +
+ static_cast<int32_t>(in_data[i]);
+ out_data[i] = rtc::saturated_cast<int16_t>(wrap_guard);
+ }
+ }
+ }
+}
+
+int AudioFrameOperations::MonoToStereo(AudioFrame* frame) {
+ if (frame->num_channels_ != 1) {
+ return -1;
+ }
+ UpmixChannels(2, frame);
+ return 0;
+}
+
+int AudioFrameOperations::StereoToMono(AudioFrame* frame) {
+ if (frame->num_channels_ != 2) {
+ return -1;
+ }
+ DownmixChannels(1, frame);
+ return frame->num_channels_ == 1 ? 0 : -1;
+}
+
+void AudioFrameOperations::QuadToStereo(const int16_t* src_audio,
+ size_t samples_per_channel,
+ int16_t* dst_audio) {
+ for (size_t i = 0; i < samples_per_channel; i++) {
+ dst_audio[i * 2] =
+ (static_cast<int32_t>(src_audio[4 * i]) + src_audio[4 * i + 1]) >> 1;
+ dst_audio[i * 2 + 1] =
+ (static_cast<int32_t>(src_audio[4 * i + 2]) + src_audio[4 * i + 3]) >>
+ 1;
+ }
+}
+
+int AudioFrameOperations::QuadToStereo(AudioFrame* frame) {
+ if (frame->num_channels_ != 4) {
+ return -1;
+ }
+
+ RTC_DCHECK_LE(frame->samples_per_channel_ * 4,
+ AudioFrame::kMaxDataSizeSamples);
+
+ if (!frame->muted()) {
+ QuadToStereo(frame->data(), frame->samples_per_channel_,
+ frame->mutable_data());
+ }
+ frame->num_channels_ = 2;
+
+ return 0;
+}
+
+void AudioFrameOperations::DownmixChannels(const int16_t* src_audio,
+ size_t src_channels,
+ size_t samples_per_channel,
+ size_t dst_channels,
+ int16_t* dst_audio) {
+ if (src_channels > 1 && dst_channels == 1) {
+ DownmixInterleavedToMono(src_audio, samples_per_channel, src_channels,
+ dst_audio);
+ return;
+ } else if (src_channels == 4 && dst_channels == 2) {
+ QuadToStereo(src_audio, samples_per_channel, dst_audio);
+ return;
+ }
+
+ RTC_DCHECK_NOTREACHED() << "src_channels: " << src_channels
+ << ", dst_channels: " << dst_channels;
+}
+
+void AudioFrameOperations::DownmixChannels(size_t dst_channels,
+ AudioFrame* frame) {
+ RTC_DCHECK_LE(frame->samples_per_channel_ * frame->num_channels_,
+ AudioFrame::kMaxDataSizeSamples);
+ if (frame->num_channels_ > 1 && dst_channels == 1) {
+ if (!frame->muted()) {
+ DownmixInterleavedToMono(frame->data(), frame->samples_per_channel_,
+ frame->num_channels_, frame->mutable_data());
+ }
+ frame->num_channels_ = 1;
+ } else if (frame->num_channels_ == 4 && dst_channels == 2) {
+ int err = QuadToStereo(frame);
+ RTC_DCHECK_EQ(err, 0);
+ } else {
+ RTC_DCHECK_NOTREACHED() << "src_channels: " << frame->num_channels_
+ << ", dst_channels: " << dst_channels;
+ }
+}
+
+void AudioFrameOperations::UpmixChannels(size_t target_number_of_channels,
+ AudioFrame* frame) {
+ RTC_DCHECK_EQ(frame->num_channels_, 1);
+ RTC_DCHECK_LE(frame->samples_per_channel_ * target_number_of_channels,
+ AudioFrame::kMaxDataSizeSamples);
+
+ if (frame->num_channels_ != 1 ||
+ frame->samples_per_channel_ * target_number_of_channels >
+ AudioFrame::kMaxDataSizeSamples) {
+ return;
+ }
+
+ if (!frame->muted()) {
+ // Up-mixing done in place. Going backwards through the frame ensure nothing
+ // is irrevocably overwritten.
+ int16_t* frame_data = frame->mutable_data();
+ for (int i = frame->samples_per_channel_ - 1; i >= 0; i--) {
+ for (size_t j = 0; j < target_number_of_channels; ++j) {
+ frame_data[target_number_of_channels * i + j] = frame_data[i];
+ }
+ }
+ }
+ frame->num_channels_ = target_number_of_channels;
+}
+
+void AudioFrameOperations::SwapStereoChannels(AudioFrame* frame) {
+ RTC_DCHECK(frame);
+ if (frame->num_channels_ != 2 || frame->muted()) {
+ return;
+ }
+
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_ * 2; i += 2) {
+ std::swap(frame_data[i], frame_data[i + 1]);
+ }
+}
+
+void AudioFrameOperations::Mute(AudioFrame* frame,
+ bool previous_frame_muted,
+ bool current_frame_muted) {
+ RTC_DCHECK(frame);
+ if (!previous_frame_muted && !current_frame_muted) {
+ // Not muted, don't touch.
+ } else if (previous_frame_muted && current_frame_muted) {
+ // Frame fully muted.
+ size_t total_samples = frame->samples_per_channel_ * frame->num_channels_;
+ RTC_DCHECK_GE(AudioFrame::kMaxDataSizeSamples, total_samples);
+ frame->Mute();
+ } else {
+ // Fade is a no-op on a muted frame.
+ if (frame->muted()) {
+ return;
+ }
+
+ // Limit number of samples to fade, if frame isn't long enough.
+ size_t count = kMuteFadeFrames;
+ float inc = kMuteFadeInc;
+ if (frame->samples_per_channel_ < kMuteFadeFrames) {
+ count = frame->samples_per_channel_;
+ if (count > 0) {
+ inc = 1.0f / count;
+ }
+ }
+
+ size_t start = 0;
+ size_t end = count;
+ float start_g = 0.0f;
+ if (current_frame_muted) {
+ // Fade out the last `count` samples of frame.
+ RTC_DCHECK(!previous_frame_muted);
+ start = frame->samples_per_channel_ - count;
+ end = frame->samples_per_channel_;
+ start_g = 1.0f;
+ inc = -inc;
+ } else {
+ // Fade in the first `count` samples of frame.
+ RTC_DCHECK(previous_frame_muted);
+ }
+
+ // Perform fade.
+ int16_t* frame_data = frame->mutable_data();
+ size_t channels = frame->num_channels_;
+ for (size_t j = 0; j < channels; ++j) {
+ float g = start_g;
+ for (size_t i = start * channels; i < end * channels; i += channels) {
+ g += inc;
+ frame_data[i + j] *= g;
+ }
+ }
+ }
+}
+
+void AudioFrameOperations::Mute(AudioFrame* frame) {
+ Mute(frame, true, true);
+}
+
+void AudioFrameOperations::ApplyHalfGain(AudioFrame* frame) {
+ RTC_DCHECK(frame);
+ RTC_DCHECK_GT(frame->num_channels_, 0);
+ if (frame->num_channels_ < 1 || frame->muted()) {
+ return;
+ }
+
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_ * frame->num_channels_;
+ i++) {
+ frame_data[i] = frame_data[i] >> 1;
+ }
+}
+
+int AudioFrameOperations::Scale(float left, float right, AudioFrame* frame) {
+ if (frame->num_channels_ != 2) {
+ return -1;
+ } else if (frame->muted()) {
+ return 0;
+ }
+
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_; i++) {
+ frame_data[2 * i] = static_cast<int16_t>(left * frame_data[2 * i]);
+ frame_data[2 * i + 1] = static_cast<int16_t>(right * frame_data[2 * i + 1]);
+ }
+ return 0;
+}
+
+int AudioFrameOperations::ScaleWithSat(float scale, AudioFrame* frame) {
+ if (frame->muted()) {
+ return 0;
+ }
+
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_ * frame->num_channels_;
+ i++) {
+ frame_data[i] = rtc::saturated_cast<int16_t>(scale * frame_data[i]);
+ }
+ return 0;
+}
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/utility/audio_frame_operations.h b/third_party/libwebrtc/audio/utility/audio_frame_operations.h
new file mode 100644
index 0000000000..2a5f29f4f5
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/audio_frame_operations.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_UTILITY_AUDIO_FRAME_OPERATIONS_H_
+#define AUDIO_UTILITY_AUDIO_FRAME_OPERATIONS_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "absl/base/attributes.h"
+#include "api/audio/audio_frame.h"
+
+namespace webrtc {
+
+// TODO(andrew): consolidate this with utility.h and audio_frame_manipulator.h.
+// Change reference parameters to pointers. Consider using a namespace rather
+// than a class.
+class AudioFrameOperations {
+ public:
+ // Add samples in `frame_to_add` with samples in `result_frame`
+ // putting the results in `results_frame`. The fields
+ // `vad_activity_` and `speech_type_` of the result frame are
+ // updated. If `result_frame` is empty (`samples_per_channel_`==0),
+ // the samples in `frame_to_add` are added to it. The number of
+ // channels and number of samples per channel must match except when
+ // `result_frame` is empty.
+ static void Add(const AudioFrame& frame_to_add, AudioFrame* result_frame);
+
+ // `frame.num_channels_` will be updated. This version checks for sufficient
+ // buffer size and that `num_channels_` is mono. Use UpmixChannels
+ // instead. TODO(bugs.webrtc.org/8649): remove.
+ ABSL_DEPRECATED("bugs.webrtc.org/8649")
+ static int MonoToStereo(AudioFrame* frame);
+
+ // `frame.num_channels_` will be updated. This version checks that
+ // `num_channels_` is stereo. Use DownmixChannels
+ // instead. TODO(bugs.webrtc.org/8649): remove.
+ ABSL_DEPRECATED("bugs.webrtc.org/8649")
+ static int StereoToMono(AudioFrame* frame);
+
+ // Downmixes 4 channels `src_audio` to stereo `dst_audio`. This is an in-place
+ // operation, meaning `src_audio` and `dst_audio` may point to the same
+ // buffer.
+ static void QuadToStereo(const int16_t* src_audio,
+ size_t samples_per_channel,
+ int16_t* dst_audio);
+
+ // `frame.num_channels_` will be updated. This version checks that
+ // `num_channels_` is 4 channels.
+ static int QuadToStereo(AudioFrame* frame);
+
+ // Downmixes `src_channels` `src_audio` to `dst_channels` `dst_audio`.
+ // This is an in-place operation, meaning `src_audio` and `dst_audio`
+ // may point to the same buffer. Supported channel combinations are
+ // Stereo to Mono, Quad to Mono, and Quad to Stereo.
+ static void DownmixChannels(const int16_t* src_audio,
+ size_t src_channels,
+ size_t samples_per_channel,
+ size_t dst_channels,
+ int16_t* dst_audio);
+
+ // `frame.num_channels_` will be updated. This version checks that
+ // `num_channels_` and `dst_channels` are valid and performs relevant downmix.
+ // Supported channel combinations are N channels to Mono, and Quad to Stereo.
+ static void DownmixChannels(size_t dst_channels, AudioFrame* frame);
+
+ // `frame.num_channels_` will be updated. This version checks that
+ // `num_channels_` and `dst_channels` are valid and performs relevant
+ // downmix. Supported channel combinations are Mono to N
+ // channels. The single channel is replicated.
+ static void UpmixChannels(size_t target_number_of_channels,
+ AudioFrame* frame);
+
+ // Swap the left and right channels of `frame`. Fails silently if `frame` is
+ // not stereo.
+ static void SwapStereoChannels(AudioFrame* frame);
+
+ // Conditionally zero out contents of `frame` for implementing audio mute:
+ // `previous_frame_muted` && `current_frame_muted` - Zero out whole frame.
+ // `previous_frame_muted` && !`current_frame_muted` - Fade-in at frame start.
+ // !`previous_frame_muted` && `current_frame_muted` - Fade-out at frame end.
+ // !`previous_frame_muted` && !`current_frame_muted` - Leave frame untouched.
+ static void Mute(AudioFrame* frame,
+ bool previous_frame_muted,
+ bool current_frame_muted);
+
+ // Zero out contents of frame.
+ static void Mute(AudioFrame* frame);
+
+ // Halve samples in `frame`.
+ static void ApplyHalfGain(AudioFrame* frame);
+
+ static int Scale(float left, float right, AudioFrame* frame);
+
+ static int ScaleWithSat(float scale, AudioFrame* frame);
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_UTILITY_AUDIO_FRAME_OPERATIONS_H_
diff --git a/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build b/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build
new file mode 100644
index 0000000000..81aea2d627
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build
@@ -0,0 +1,234 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+ ### This moz.build was AUTOMATICALLY GENERATED from a GN config, ###
+ ### DO NOT edit it by hand. ###
+
+COMPILE_FLAGS["OS_INCLUDES"] = []
+AllowCompilerWarnings()
+
+DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
+DEFINES["RTC_DAV1D_IN_INTERNAL_DECODER_FACTORY"] = True
+DEFINES["RTC_ENABLE_VP9"] = True
+DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
+DEFINES["WEBRTC_LIBRARY_IMPL"] = True
+DEFINES["WEBRTC_MOZILLA_BUILD"] = True
+DEFINES["WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS"] = "0"
+DEFINES["WEBRTC_STRICT_FIELD_TRIALS"] = "0"
+
+FINAL_LIBRARY = "webrtc"
+
+
+LOCAL_INCLUDES += [
+ "!/ipc/ipdl/_ipdlheaders",
+ "!/third_party/libwebrtc/gen",
+ "/ipc/chromium/src",
+ "/third_party/libwebrtc/",
+ "/third_party/libwebrtc/third_party/abseil-cpp/",
+ "/tools/profiler/public"
+]
+
+UNIFIED_SOURCES += [
+ "/third_party/libwebrtc/audio/utility/audio_frame_operations.cc",
+ "/third_party/libwebrtc/audio/utility/channel_mixer.cc",
+ "/third_party/libwebrtc/audio/utility/channel_mixing_matrix.cc"
+]
+
+if not CONFIG["MOZ_DEBUG"]:
+
+ DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "0"
+ DEFINES["NDEBUG"] = True
+ DEFINES["NVALGRIND"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1":
+
+ DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
+
+if CONFIG["OS_TARGET"] == "Android":
+
+ DEFINES["ANDROID"] = True
+ DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r22_1"
+ DEFINES["HAVE_SYS_UIO_H"] = True
+ DEFINES["WEBRTC_ANDROID"] = True
+ DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+ DEFINES["WEBRTC_LINUX"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_GNU_SOURCE"] = True
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+ OS_LIBS += [
+ "log"
+ ]
+
+if CONFIG["OS_TARGET"] == "Darwin":
+
+ DEFINES["WEBRTC_MAC"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_LIBCPP_HAS_NO_ALIGNED_ALLOCATION"] = True
+ DEFINES["__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES"] = "0"
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["USE_AURA"] = "1"
+ DEFINES["USE_GLIB"] = "1"
+ DEFINES["USE_NSS_CERTS"] = "1"
+ DEFINES["USE_OZONE"] = "1"
+ DEFINES["USE_UDEV"] = True
+ DEFINES["WEBRTC_LINUX"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_FILE_OFFSET_BITS"] = "64"
+ DEFINES["_LARGEFILE64_SOURCE"] = True
+ DEFINES["_LARGEFILE_SOURCE"] = True
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+ OS_LIBS += [
+ "rt"
+ ]
+
+if CONFIG["OS_TARGET"] == "OpenBSD":
+
+ DEFINES["USE_GLIB"] = "1"
+ DEFINES["USE_OZONE"] = "1"
+ DEFINES["USE_X11"] = "1"
+ DEFINES["WEBRTC_BSD"] = True
+ DEFINES["WEBRTC_POSIX"] = True
+ DEFINES["_FILE_OFFSET_BITS"] = "64"
+ DEFINES["_LARGEFILE64_SOURCE"] = True
+ DEFINES["_LARGEFILE_SOURCE"] = True
+ DEFINES["__STDC_CONSTANT_MACROS"] = True
+ DEFINES["__STDC_FORMAT_MACROS"] = True
+
+if CONFIG["OS_TARGET"] == "WINNT":
+
+ DEFINES["CERT_CHAIN_PARA_HAS_EXTRA_FIELDS"] = True
+ DEFINES["NOMINMAX"] = True
+ DEFINES["NTDDI_VERSION"] = "0x0A000000"
+ DEFINES["PSAPI_VERSION"] = "2"
+ DEFINES["UNICODE"] = True
+ DEFINES["USE_AURA"] = "1"
+ DEFINES["WEBRTC_WIN"] = True
+ DEFINES["WIN32"] = True
+ DEFINES["WIN32_LEAN_AND_MEAN"] = True
+ DEFINES["WINAPI_FAMILY"] = "WINAPI_FAMILY_DESKTOP_APP"
+ DEFINES["WINVER"] = "0x0A00"
+ DEFINES["_ATL_NO_OPENGL"] = True
+ DEFINES["_CRT_RAND_S"] = True
+ DEFINES["_CRT_SECURE_NO_DEPRECATE"] = True
+ DEFINES["_ENABLE_EXTENDED_ALIGNED_STORAGE"] = True
+ DEFINES["_HAS_EXCEPTIONS"] = "0"
+ DEFINES["_HAS_NODISCARD"] = True
+ DEFINES["_SCL_SECURE_NO_DEPRECATE"] = True
+ DEFINES["_SECURE_ATL"] = True
+ DEFINES["_UNICODE"] = True
+ DEFINES["_WIN32_WINNT"] = "0x0A00"
+ DEFINES["_WINDOWS"] = True
+ DEFINES["__STD_C"] = True
+
+ OS_LIBS += [
+ "crypt32",
+ "iphlpapi",
+ "secur32",
+ "winmm"
+ ]
+
+if CONFIG["CPU_ARCH"] == "aarch64":
+
+ DEFINES["WEBRTC_ARCH_ARM64"] = True
+ DEFINES["WEBRTC_HAS_NEON"] = True
+
+if CONFIG["CPU_ARCH"] == "arm":
+
+ CXXFLAGS += [
+ "-mfpu=neon"
+ ]
+
+ DEFINES["WEBRTC_ARCH_ARM"] = True
+ DEFINES["WEBRTC_ARCH_ARM_V7"] = True
+ DEFINES["WEBRTC_HAS_NEON"] = True
+
+if CONFIG["CPU_ARCH"] == "mips32":
+
+ DEFINES["MIPS32_LE"] = True
+ DEFINES["MIPS_FPU_LE"] = True
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "mips64":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86":
+
+ DEFINES["WEBRTC_ENABLE_AVX2"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64":
+
+ DEFINES["WEBRTC_ENABLE_AVX2"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "OpenBSD":
+
+ DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
+
+ DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["USE_X11"] = "1"
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+ OS_LIBS += [
+ "android_support",
+ "unwind"
+ ]
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
+
+ CXXFLAGS += [
+ "-msse2"
+ ]
+
+ OS_LIBS += [
+ "android_support"
+ ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+ CXXFLAGS += [
+ "-msse2"
+ ]
+
+ DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+ DEFINES["_GNU_SOURCE"] = True
+
+Library("audio_frame_operations_gn")
diff --git a/third_party/libwebrtc/audio/utility/audio_frame_operations_unittest.cc b/third_party/libwebrtc/audio/utility/audio_frame_operations_unittest.cc
new file mode 100644
index 0000000000..1a2c16e45f
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/audio_frame_operations_unittest.cc
@@ -0,0 +1,622 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/utility/audio_frame_operations.h"
+
+#include "rtc_base/checks.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+
+class AudioFrameOperationsTest : public ::testing::Test {
+ protected:
+ AudioFrameOperationsTest() {
+ // Set typical values.
+ frame_.samples_per_channel_ = 320;
+ frame_.num_channels_ = 2;
+ }
+
+ AudioFrame frame_;
+};
+
+class AudioFrameOperationsDeathTest : public AudioFrameOperationsTest {};
+
+void SetFrameData(int16_t ch1,
+ int16_t ch2,
+ int16_t ch3,
+ int16_t ch4,
+ AudioFrame* frame) {
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_ * 4; i += 4) {
+ frame_data[i] = ch1;
+ frame_data[i + 1] = ch2;
+ frame_data[i + 2] = ch3;
+ frame_data[i + 3] = ch4;
+ }
+}
+
+void SetFrameData(int16_t left, int16_t right, AudioFrame* frame) {
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_ * 2; i += 2) {
+ frame_data[i] = left;
+ frame_data[i + 1] = right;
+ }
+}
+
+void SetFrameData(int16_t data, AudioFrame* frame) {
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel_ * frame->num_channels_;
+ i++) {
+ frame_data[i] = data;
+ }
+}
+
+void VerifyFramesAreEqual(const AudioFrame& frame1, const AudioFrame& frame2) {
+ EXPECT_EQ(frame1.num_channels_, frame2.num_channels_);
+ EXPECT_EQ(frame1.samples_per_channel_, frame2.samples_per_channel_);
+ const int16_t* frame1_data = frame1.data();
+ const int16_t* frame2_data = frame2.data();
+ for (size_t i = 0; i < frame1.samples_per_channel_ * frame1.num_channels_;
+ i++) {
+ EXPECT_EQ(frame1_data[i], frame2_data[i]);
+ }
+ EXPECT_EQ(frame1.muted(), frame2.muted());
+}
+
+void InitFrame(AudioFrame* frame,
+ size_t channels,
+ size_t samples_per_channel,
+ int16_t left_data,
+ int16_t right_data) {
+ RTC_DCHECK(frame);
+ RTC_DCHECK_GE(2, channels);
+ RTC_DCHECK_GE(AudioFrame::kMaxDataSizeSamples,
+ samples_per_channel * channels);
+ frame->samples_per_channel_ = samples_per_channel;
+ frame->num_channels_ = channels;
+ if (channels == 2) {
+ SetFrameData(left_data, right_data, frame);
+ } else if (channels == 1) {
+ SetFrameData(left_data, frame);
+ }
+}
+
+int16_t GetChannelData(const AudioFrame& frame, size_t channel, size_t index) {
+ RTC_DCHECK_LT(channel, frame.num_channels_);
+ RTC_DCHECK_LT(index, frame.samples_per_channel_);
+ return frame.data()[index * frame.num_channels_ + channel];
+}
+
+void VerifyFrameDataBounds(const AudioFrame& frame,
+ size_t channel,
+ int16_t max,
+ int16_t min) {
+ for (size_t i = 0; i < frame.samples_per_channel_; ++i) {
+ int16_t s = GetChannelData(frame, channel, i);
+ EXPECT_LE(min, s);
+ EXPECT_GE(max, s);
+ }
+}
+
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+TEST_F(AudioFrameOperationsDeathTest, MonoToStereoFailsWithBadParameters) {
+ EXPECT_DEATH(AudioFrameOperations::UpmixChannels(2, &frame_), "");
+ frame_.samples_per_channel_ = AudioFrame::kMaxDataSizeSamples;
+ frame_.num_channels_ = 1;
+ EXPECT_DEATH(AudioFrameOperations::UpmixChannels(2, &frame_), "");
+}
+#endif
+
+TEST_F(AudioFrameOperationsTest, MonoToStereoSucceeds) {
+ frame_.num_channels_ = 1;
+ SetFrameData(1, &frame_);
+
+ AudioFrameOperations::UpmixChannels(2, &frame_);
+ EXPECT_EQ(2u, frame_.num_channels_);
+
+ AudioFrame stereo_frame;
+ stereo_frame.samples_per_channel_ = 320;
+ stereo_frame.num_channels_ = 2;
+ SetFrameData(1, 1, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, MonoToStereoMuted) {
+ frame_.num_channels_ = 1;
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::UpmixChannels(2, &frame_);
+ EXPECT_EQ(2u, frame_.num_channels_);
+ EXPECT_TRUE(frame_.muted());
+}
+
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+TEST_F(AudioFrameOperationsDeathTest, StereoToMonoFailsWithBadParameters) {
+ frame_.num_channels_ = 1;
+ EXPECT_DEATH(AudioFrameOperations::DownmixChannels(1, &frame_), "");
+}
+#endif
+
+TEST_F(AudioFrameOperationsTest, StereoToMonoSucceeds) {
+ SetFrameData(4, 2, &frame_);
+ AudioFrameOperations::DownmixChannels(1, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels_);
+
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = 320;
+ mono_frame.num_channels_ = 1;
+ SetFrameData(3, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, StereoToMonoMuted) {
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::DownmixChannels(1, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels_);
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, StereoToMonoBufferSucceeds) {
+ AudioFrame target_frame;
+ SetFrameData(4, 2, &frame_);
+
+ target_frame.num_channels_ = 1;
+ target_frame.samples_per_channel_ = frame_.samples_per_channel_;
+
+ AudioFrameOperations::DownmixChannels(frame_.data(), 2,
+ frame_.samples_per_channel_, 1,
+ target_frame.mutable_data());
+
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = 320;
+ mono_frame.num_channels_ = 1;
+ SetFrameData(3, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, target_frame);
+}
+
+TEST_F(AudioFrameOperationsTest, StereoToMonoDoesNotWrapAround) {
+ SetFrameData(-32768, -32768, &frame_);
+ AudioFrameOperations::DownmixChannels(1, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels_);
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = 320;
+ mono_frame.num_channels_ = 1;
+ SetFrameData(-32768, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToMonoSucceeds) {
+ frame_.num_channels_ = 4;
+ SetFrameData(4, 2, 6, 8, &frame_);
+
+ AudioFrameOperations::DownmixChannels(1, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels_);
+
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = 320;
+ mono_frame.num_channels_ = 1;
+ SetFrameData(5, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToMonoMuted) {
+ frame_.num_channels_ = 4;
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::DownmixChannels(1, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels_);
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToMonoBufferSucceeds) {
+ AudioFrame target_frame;
+ frame_.num_channels_ = 4;
+ SetFrameData(4, 2, 6, 8, &frame_);
+
+ target_frame.num_channels_ = 1;
+ target_frame.samples_per_channel_ = frame_.samples_per_channel_;
+
+ AudioFrameOperations::DownmixChannels(frame_.data(), 4,
+ frame_.samples_per_channel_, 1,
+ target_frame.mutable_data());
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = 320;
+ mono_frame.num_channels_ = 1;
+ SetFrameData(5, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, target_frame);
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToMonoDoesNotWrapAround) {
+ frame_.num_channels_ = 4;
+ SetFrameData(-32768, -32768, -32768, -32768, &frame_);
+ AudioFrameOperations::DownmixChannels(1, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels_);
+
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = 320;
+ mono_frame.num_channels_ = 1;
+ SetFrameData(-32768, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToStereoFailsWithBadParameters) {
+ frame_.num_channels_ = 1;
+ EXPECT_EQ(-1, AudioFrameOperations::QuadToStereo(&frame_));
+ frame_.num_channels_ = 2;
+ EXPECT_EQ(-1, AudioFrameOperations::QuadToStereo(&frame_));
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToStereoSucceeds) {
+ frame_.num_channels_ = 4;
+ SetFrameData(4, 2, 6, 8, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::QuadToStereo(&frame_));
+
+ AudioFrame stereo_frame;
+ stereo_frame.samples_per_channel_ = 320;
+ stereo_frame.num_channels_ = 2;
+ SetFrameData(3, 7, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToStereoMuted) {
+ frame_.num_channels_ = 4;
+ ASSERT_TRUE(frame_.muted());
+ EXPECT_EQ(0, AudioFrameOperations::QuadToStereo(&frame_));
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToStereoBufferSucceeds) {
+ AudioFrame target_frame;
+ frame_.num_channels_ = 4;
+ SetFrameData(4, 2, 6, 8, &frame_);
+
+ target_frame.num_channels_ = 2;
+ target_frame.samples_per_channel_ = frame_.samples_per_channel_;
+
+ AudioFrameOperations::QuadToStereo(frame_.data(), frame_.samples_per_channel_,
+ target_frame.mutable_data());
+ AudioFrame stereo_frame;
+ stereo_frame.samples_per_channel_ = 320;
+ stereo_frame.num_channels_ = 2;
+ SetFrameData(3, 7, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, target_frame);
+}
+
+TEST_F(AudioFrameOperationsTest, QuadToStereoDoesNotWrapAround) {
+ frame_.num_channels_ = 4;
+ SetFrameData(-32768, -32768, -32768, -32768, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::QuadToStereo(&frame_));
+
+ AudioFrame stereo_frame;
+ stereo_frame.samples_per_channel_ = 320;
+ stereo_frame.num_channels_ = 2;
+ SetFrameData(-32768, -32768, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, SwapStereoChannelsSucceedsOnStereo) {
+ SetFrameData(0, 1, &frame_);
+
+ AudioFrame swapped_frame;
+ swapped_frame.samples_per_channel_ = 320;
+ swapped_frame.num_channels_ = 2;
+ SetFrameData(1, 0, &swapped_frame);
+
+ AudioFrameOperations::SwapStereoChannels(&frame_);
+ VerifyFramesAreEqual(swapped_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, SwapStereoChannelsMuted) {
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::SwapStereoChannels(&frame_);
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, SwapStereoChannelsFailsOnMono) {
+ frame_.num_channels_ = 1;
+ // Set data to "stereo", despite it being a mono frame.
+ SetFrameData(0, 1, &frame_);
+
+ AudioFrame orig_frame;
+ orig_frame.CopyFrom(frame_);
+ AudioFrameOperations::SwapStereoChannels(&frame_);
+ // Verify that no swap occurred.
+ VerifyFramesAreEqual(orig_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, MuteDisabled) {
+ SetFrameData(1000, -1000, &frame_);
+ AudioFrameOperations::Mute(&frame_, false, false);
+
+ AudioFrame muted_frame;
+ muted_frame.samples_per_channel_ = 320;
+ muted_frame.num_channels_ = 2;
+ SetFrameData(1000, -1000, &muted_frame);
+ VerifyFramesAreEqual(muted_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, MuteEnabled) {
+ SetFrameData(1000, -1000, &frame_);
+ AudioFrameOperations::Mute(&frame_, true, true);
+
+ AudioFrame muted_frame;
+ muted_frame.samples_per_channel_ = frame_.samples_per_channel_;
+ muted_frame.num_channels_ = frame_.num_channels_;
+ ASSERT_TRUE(muted_frame.muted());
+ VerifyFramesAreEqual(muted_frame, frame_);
+}
+
+// Verify that *beginning* to mute works for short and long (>128) frames, mono
+// and stereo. Beginning mute should yield a ramp down to zero.
+TEST_F(AudioFrameOperationsTest, MuteBeginMonoLong) {
+ InitFrame(&frame_, 1, 228, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, false, true);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ EXPECT_EQ(1000, GetChannelData(frame_, 0, 99));
+ EXPECT_EQ(992, GetChannelData(frame_, 0, 100));
+ EXPECT_EQ(7, GetChannelData(frame_, 0, 226));
+ EXPECT_EQ(0, GetChannelData(frame_, 0, 227));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteBeginMonoShort) {
+ InitFrame(&frame_, 1, 93, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, false, true);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ EXPECT_EQ(989, GetChannelData(frame_, 0, 0));
+ EXPECT_EQ(978, GetChannelData(frame_, 0, 1));
+ EXPECT_EQ(10, GetChannelData(frame_, 0, 91));
+ EXPECT_EQ(0, GetChannelData(frame_, 0, 92));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteBeginStereoLong) {
+ InitFrame(&frame_, 2, 228, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, false, true);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ VerifyFrameDataBounds(frame_, 1, 0, -1000);
+ EXPECT_EQ(1000, GetChannelData(frame_, 0, 99));
+ EXPECT_EQ(-1000, GetChannelData(frame_, 1, 99));
+ EXPECT_EQ(992, GetChannelData(frame_, 0, 100));
+ EXPECT_EQ(-992, GetChannelData(frame_, 1, 100));
+ EXPECT_EQ(7, GetChannelData(frame_, 0, 226));
+ EXPECT_EQ(-7, GetChannelData(frame_, 1, 226));
+ EXPECT_EQ(0, GetChannelData(frame_, 0, 227));
+ EXPECT_EQ(0, GetChannelData(frame_, 1, 227));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteBeginStereoShort) {
+ InitFrame(&frame_, 2, 93, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, false, true);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ VerifyFrameDataBounds(frame_, 1, 0, -1000);
+ EXPECT_EQ(989, GetChannelData(frame_, 0, 0));
+ EXPECT_EQ(-989, GetChannelData(frame_, 1, 0));
+ EXPECT_EQ(978, GetChannelData(frame_, 0, 1));
+ EXPECT_EQ(-978, GetChannelData(frame_, 1, 1));
+ EXPECT_EQ(10, GetChannelData(frame_, 0, 91));
+ EXPECT_EQ(-10, GetChannelData(frame_, 1, 91));
+ EXPECT_EQ(0, GetChannelData(frame_, 0, 92));
+ EXPECT_EQ(0, GetChannelData(frame_, 1, 92));
+}
+
+// Verify that *ending* to mute works for short and long (>128) frames, mono
+// and stereo. Ending mute should yield a ramp up from zero.
+TEST_F(AudioFrameOperationsTest, MuteEndMonoLong) {
+ InitFrame(&frame_, 1, 228, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, true, false);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ EXPECT_EQ(7, GetChannelData(frame_, 0, 0));
+ EXPECT_EQ(15, GetChannelData(frame_, 0, 1));
+ EXPECT_EQ(1000, GetChannelData(frame_, 0, 127));
+ EXPECT_EQ(1000, GetChannelData(frame_, 0, 128));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteEndMonoShort) {
+ InitFrame(&frame_, 1, 93, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, true, false);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ EXPECT_EQ(10, GetChannelData(frame_, 0, 0));
+ EXPECT_EQ(21, GetChannelData(frame_, 0, 1));
+ EXPECT_EQ(989, GetChannelData(frame_, 0, 91));
+ EXPECT_EQ(999, GetChannelData(frame_, 0, 92));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteEndStereoLong) {
+ InitFrame(&frame_, 2, 228, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, true, false);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ VerifyFrameDataBounds(frame_, 1, 0, -1000);
+ EXPECT_EQ(7, GetChannelData(frame_, 0, 0));
+ EXPECT_EQ(-7, GetChannelData(frame_, 1, 0));
+ EXPECT_EQ(15, GetChannelData(frame_, 0, 1));
+ EXPECT_EQ(-15, GetChannelData(frame_, 1, 1));
+ EXPECT_EQ(1000, GetChannelData(frame_, 0, 127));
+ EXPECT_EQ(-1000, GetChannelData(frame_, 1, 127));
+ EXPECT_EQ(1000, GetChannelData(frame_, 0, 128));
+ EXPECT_EQ(-1000, GetChannelData(frame_, 1, 128));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteEndStereoShort) {
+ InitFrame(&frame_, 2, 93, 1000, -1000);
+ AudioFrameOperations::Mute(&frame_, true, false);
+ VerifyFrameDataBounds(frame_, 0, 1000, 0);
+ VerifyFrameDataBounds(frame_, 1, 0, -1000);
+ EXPECT_EQ(10, GetChannelData(frame_, 0, 0));
+ EXPECT_EQ(-10, GetChannelData(frame_, 1, 0));
+ EXPECT_EQ(21, GetChannelData(frame_, 0, 1));
+ EXPECT_EQ(-21, GetChannelData(frame_, 1, 1));
+ EXPECT_EQ(989, GetChannelData(frame_, 0, 91));
+ EXPECT_EQ(-989, GetChannelData(frame_, 1, 91));
+ EXPECT_EQ(999, GetChannelData(frame_, 0, 92));
+ EXPECT_EQ(-999, GetChannelData(frame_, 1, 92));
+}
+
+TEST_F(AudioFrameOperationsTest, MuteBeginAlreadyMuted) {
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::Mute(&frame_, false, true);
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, MuteEndAlreadyMuted) {
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::Mute(&frame_, true, false);
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, ApplyHalfGainSucceeds) {
+ SetFrameData(2, &frame_);
+
+ AudioFrame half_gain_frame;
+ half_gain_frame.num_channels_ = frame_.num_channels_;
+ half_gain_frame.samples_per_channel_ = frame_.samples_per_channel_;
+ SetFrameData(1, &half_gain_frame);
+
+ AudioFrameOperations::ApplyHalfGain(&frame_);
+ VerifyFramesAreEqual(half_gain_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, ApplyHalfGainMuted) {
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::ApplyHalfGain(&frame_);
+ EXPECT_TRUE(frame_.muted());
+}
+
+// TODO(andrew): should not allow negative scales.
+TEST_F(AudioFrameOperationsTest, DISABLED_ScaleFailsWithBadParameters) {
+ frame_.num_channels_ = 1;
+ EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, 1.0, &frame_));
+
+ frame_.num_channels_ = 3;
+ EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, 1.0, &frame_));
+
+ frame_.num_channels_ = 2;
+ EXPECT_EQ(-1, AudioFrameOperations::Scale(-1.0, 1.0, &frame_));
+ EXPECT_EQ(-1, AudioFrameOperations::Scale(1.0, -1.0, &frame_));
+}
+
+// TODO(andrew): fix the wraparound bug. We should always saturate.
+TEST_F(AudioFrameOperationsTest, DISABLED_ScaleDoesNotWrapAround) {
+ SetFrameData(4000, -4000, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::Scale(10.0, 10.0, &frame_));
+
+ AudioFrame clipped_frame;
+ clipped_frame.samples_per_channel_ = 320;
+ clipped_frame.num_channels_ = 2;
+ SetFrameData(32767, -32768, &clipped_frame);
+ VerifyFramesAreEqual(clipped_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, ScaleSucceeds) {
+ SetFrameData(1, -1, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::Scale(2.0, 3.0, &frame_));
+
+ AudioFrame scaled_frame;
+ scaled_frame.samples_per_channel_ = 320;
+ scaled_frame.num_channels_ = 2;
+ SetFrameData(2, -3, &scaled_frame);
+ VerifyFramesAreEqual(scaled_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, ScaleMuted) {
+ ASSERT_TRUE(frame_.muted());
+ EXPECT_EQ(0, AudioFrameOperations::Scale(2.0, 3.0, &frame_));
+ EXPECT_TRUE(frame_.muted());
+}
+
+// TODO(andrew): should fail with a negative scale.
+TEST_F(AudioFrameOperationsTest, DISABLED_ScaleWithSatFailsWithBadParameters) {
+ EXPECT_EQ(-1, AudioFrameOperations::ScaleWithSat(-1.0, &frame_));
+}
+
+TEST_F(AudioFrameOperationsTest, ScaleWithSatDoesNotWrapAround) {
+ frame_.num_channels_ = 1;
+ SetFrameData(4000, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(10.0, &frame_));
+
+ AudioFrame clipped_frame;
+ clipped_frame.samples_per_channel_ = 320;
+ clipped_frame.num_channels_ = 1;
+ SetFrameData(32767, &clipped_frame);
+ VerifyFramesAreEqual(clipped_frame, frame_);
+
+ SetFrameData(-4000, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(10.0, &frame_));
+ SetFrameData(-32768, &clipped_frame);
+ VerifyFramesAreEqual(clipped_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, ScaleWithSatSucceeds) {
+ frame_.num_channels_ = 1;
+ SetFrameData(1, &frame_);
+ EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(2.0, &frame_));
+
+ AudioFrame scaled_frame;
+ scaled_frame.samples_per_channel_ = 320;
+ scaled_frame.num_channels_ = 1;
+ SetFrameData(2, &scaled_frame);
+ VerifyFramesAreEqual(scaled_frame, frame_);
+}
+
+TEST_F(AudioFrameOperationsTest, ScaleWithSatMuted) {
+ ASSERT_TRUE(frame_.muted());
+ EXPECT_EQ(0, AudioFrameOperations::ScaleWithSat(2.0, &frame_));
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(AudioFrameOperationsTest, AddingXToEmptyGivesX) {
+ // When samples_per_channel_ is 0, the frame counts as empty and zero.
+ AudioFrame frame_to_add_to;
+ frame_to_add_to.mutable_data(); // Unmute the frame.
+ ASSERT_FALSE(frame_to_add_to.muted());
+ frame_to_add_to.samples_per_channel_ = 0;
+ frame_to_add_to.num_channels_ = frame_.num_channels_;
+
+ SetFrameData(1000, &frame_);
+ AudioFrameOperations::Add(frame_, &frame_to_add_to);
+ VerifyFramesAreEqual(frame_, frame_to_add_to);
+}
+
+TEST_F(AudioFrameOperationsTest, AddingXToMutedGivesX) {
+ AudioFrame frame_to_add_to;
+ ASSERT_TRUE(frame_to_add_to.muted());
+ frame_to_add_to.samples_per_channel_ = frame_.samples_per_channel_;
+ frame_to_add_to.num_channels_ = frame_.num_channels_;
+
+ SetFrameData(1000, &frame_);
+ AudioFrameOperations::Add(frame_, &frame_to_add_to);
+ VerifyFramesAreEqual(frame_, frame_to_add_to);
+}
+
+TEST_F(AudioFrameOperationsTest, AddingMutedToXGivesX) {
+ AudioFrame frame_to_add_to;
+ frame_to_add_to.samples_per_channel_ = frame_.samples_per_channel_;
+ frame_to_add_to.num_channels_ = frame_.num_channels_;
+ SetFrameData(1000, &frame_to_add_to);
+
+ AudioFrame frame_copy;
+ frame_copy.CopyFrom(frame_to_add_to);
+
+ ASSERT_TRUE(frame_.muted());
+ AudioFrameOperations::Add(frame_, &frame_to_add_to);
+ VerifyFramesAreEqual(frame_copy, frame_to_add_to);
+}
+
+TEST_F(AudioFrameOperationsTest, AddingTwoFramesProducesTheirSum) {
+ AudioFrame frame_to_add_to;
+ frame_to_add_to.samples_per_channel_ = frame_.samples_per_channel_;
+ frame_to_add_to.num_channels_ = frame_.num_channels_;
+ SetFrameData(1000, &frame_to_add_to);
+ SetFrameData(2000, &frame_);
+
+ AudioFrameOperations::Add(frame_, &frame_to_add_to);
+ SetFrameData(frame_.data()[0] + 1000, &frame_);
+ VerifyFramesAreEqual(frame_, frame_to_add_to);
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/utility/channel_mixer.cc b/third_party/libwebrtc/audio/utility/channel_mixer.cc
new file mode 100644
index 0000000000..0f1e663873
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/channel_mixer.cc
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/utility/channel_mixer.h"
+
+#include "audio/utility/channel_mixing_matrix.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/numerics/safe_conversions.h"
+
+namespace webrtc {
+
+ChannelMixer::ChannelMixer(ChannelLayout input_layout,
+ ChannelLayout output_layout)
+ : input_layout_(input_layout),
+ output_layout_(output_layout),
+ input_channels_(ChannelLayoutToChannelCount(input_layout)),
+ output_channels_(ChannelLayoutToChannelCount(output_layout)) {
+ // Create the transformation matrix.
+ ChannelMixingMatrix matrix_builder(input_layout_, input_channels_,
+ output_layout_, output_channels_);
+ remapping_ = matrix_builder.CreateTransformationMatrix(&matrix_);
+}
+
+ChannelMixer::~ChannelMixer() = default;
+
+void ChannelMixer::Transform(AudioFrame* frame) {
+ RTC_DCHECK(frame);
+ RTC_DCHECK_EQ(matrix_[0].size(), static_cast<size_t>(input_channels_));
+ RTC_DCHECK_EQ(matrix_.size(), static_cast<size_t>(output_channels_));
+
+ // Leave the audio frame intact if the channel layouts for in and out are
+ // identical.
+ if (input_layout_ == output_layout_) {
+ return;
+ }
+
+ if (IsUpMixing()) {
+ RTC_CHECK_LE(frame->samples_per_channel() * output_channels_,
+ frame->max_16bit_samples());
+ }
+
+ // Only change the number of output channels if the audio frame is muted.
+ if (frame->muted()) {
+ frame->num_channels_ = output_channels_;
+ frame->channel_layout_ = output_layout_;
+ return;
+ }
+
+ const int16_t* in_audio = frame->data();
+
+ // Only allocate fresh memory at first access or if the required size has
+ // increased.
+ // TODO(henrika): we might be able to do downmixing in-place and thereby avoid
+ // extra memory allocation and a memcpy.
+ const size_t num_elements = frame->samples_per_channel() * output_channels_;
+ if (audio_vector_ == nullptr || num_elements > audio_vector_size_) {
+ audio_vector_.reset(new int16_t[num_elements]);
+ audio_vector_size_ = num_elements;
+ }
+ int16_t* out_audio = audio_vector_.get();
+
+ // Modify the number of channels by creating a weighted sum of input samples
+ // where the weights (scale factors) for each output sample are given by the
+ // transformation matrix.
+ for (size_t i = 0; i < frame->samples_per_channel(); i++) {
+ for (size_t output_ch = 0; output_ch < output_channels_; ++output_ch) {
+ float acc_value = 0.0f;
+ for (size_t input_ch = 0; input_ch < input_channels_; ++input_ch) {
+ const float scale = matrix_[output_ch][input_ch];
+ // Scale should always be positive.
+ RTC_DCHECK_GE(scale, 0);
+ // Each output sample is a weighted sum of input samples.
+ acc_value += scale * in_audio[i * input_channels_ + input_ch];
+ }
+ const size_t index = output_channels_ * i + output_ch;
+ RTC_CHECK_LE(index, audio_vector_size_);
+ out_audio[index] = rtc::saturated_cast<int16_t>(acc_value);
+ }
+ }
+
+ // Update channel information.
+ frame->num_channels_ = output_channels_;
+ frame->channel_layout_ = output_layout_;
+
+ // Copy the output result to the audio frame in `frame`.
+ memcpy(
+ frame->mutable_data(), out_audio,
+ sizeof(int16_t) * frame->samples_per_channel() * frame->num_channels());
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/utility/channel_mixer.h b/third_party/libwebrtc/audio/utility/channel_mixer.h
new file mode 100644
index 0000000000..2dea8eb45b
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/channel_mixer.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_UTILITY_CHANNEL_MIXER_H_
+#define AUDIO_UTILITY_CHANNEL_MIXER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <memory>
+#include <vector>
+
+#include "api/audio/audio_frame.h"
+#include "api/audio/channel_layout.h"
+
+namespace webrtc {
+
+// ChannelMixer is for converting audio between channel layouts. The conversion
+// matrix is built upon construction and used during each Transform() call. The
+// algorithm works by generating a conversion matrix mapping each output channel
+// to list of input channels. The transform renders all of the output channels,
+// with each output channel rendered according to a weighted sum of the relevant
+// input channels as defined in the matrix.
+// This file is derived from Chromium's media/base/channel_mixer.h.
+class ChannelMixer {
+ public:
+ // To mix two channels into one and preserve loudness, we must apply
+ // (1 / sqrt(2)) gain to each.
+ static constexpr float kHalfPower = 0.707106781186547524401f;
+
+ ChannelMixer(ChannelLayout input_layout, ChannelLayout output_layout);
+ ~ChannelMixer();
+
+ // Transforms all input channels corresponding to the selected `input_layout`
+ // to the number of channels in the selected `output_layout`.
+ // Example usage (downmix from stereo to mono):
+ //
+ // ChannelMixer mixer(CHANNEL_LAYOUT_STEREO, CHANNEL_LAYOUT_MONO);
+ // AudioFrame frame;
+ // frame.samples_per_channel_ = 160;
+ // frame.num_channels_ = 2;
+ // EXPECT_EQ(2u, frame.channels());
+ // mixer.Transform(&frame);
+ // EXPECT_EQ(1u, frame.channels());
+ //
+ void Transform(AudioFrame* frame);
+
+ private:
+ bool IsUpMixing() const { return output_channels_ > input_channels_; }
+
+ // Selected channel layouts.
+ const ChannelLayout input_layout_;
+ const ChannelLayout output_layout_;
+
+ // Channel counts for input and output.
+ const size_t input_channels_;
+ const size_t output_channels_;
+
+ // 2D matrix of output channels to input channels.
+ std::vector<std::vector<float> > matrix_;
+
+ // 1D array used as temporary storage during the transformation.
+ std::unique_ptr<int16_t[]> audio_vector_;
+
+ // Number of elements allocated for `audio_vector_`.
+ size_t audio_vector_size_ = 0;
+
+ // Optimization case for when we can simply remap the input channels to output
+ // channels, i.e., when all scaling factors in `matrix_` equals 1.0.
+ bool remapping_;
+
+ // Delete the copy constructor and assignment operator.
+ ChannelMixer(const ChannelMixer& other) = delete;
+ ChannelMixer& operator=(const ChannelMixer& other) = delete;
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_UTILITY_CHANNEL_MIXER_H_
diff --git a/third_party/libwebrtc/audio/utility/channel_mixer_unittest.cc b/third_party/libwebrtc/audio/utility/channel_mixer_unittest.cc
new file mode 100644
index 0000000000..94cb1ac7e3
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/channel_mixer_unittest.cc
@@ -0,0 +1,393 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/utility/channel_mixer.h"
+
+#include <memory>
+
+#include "api/audio/audio_frame.h"
+#include "api/audio/channel_layout.h"
+#include "audio/utility/channel_mixing_matrix.h"
+#include "rtc_base/arraysize.h"
+#include "rtc_base/strings/string_builder.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+
+namespace {
+
+constexpr uint32_t kTimestamp = 27;
+constexpr int kSampleRateHz = 16000;
+constexpr size_t kSamplesPerChannel = kSampleRateHz / 100;
+
+class ChannelMixerTest : public ::testing::Test {
+ protected:
+ ChannelMixerTest() {
+ // Use 10ms audio frames by default. Don't set values yet.
+ frame_.samples_per_channel_ = kSamplesPerChannel;
+ frame_.sample_rate_hz_ = kSampleRateHz;
+ EXPECT_TRUE(frame_.muted());
+ }
+
+ virtual ~ChannelMixerTest() {}
+
+ AudioFrame frame_;
+};
+
+void SetFrameData(int16_t data, AudioFrame* frame) {
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel() * frame->num_channels();
+ i++) {
+ frame_data[i] = data;
+ }
+}
+
+void SetMonoData(int16_t center, AudioFrame* frame) {
+ frame->num_channels_ = 1;
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel(); ++i) {
+ frame_data[i] = center;
+ }
+ EXPECT_FALSE(frame->muted());
+}
+
+void SetStereoData(int16_t left, int16_t right, AudioFrame* frame) {
+ ASSERT_LE(2 * frame->samples_per_channel(), frame->max_16bit_samples());
+ frame->num_channels_ = 2;
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel() * 2; i += 2) {
+ frame_data[i] = left;
+ frame_data[i + 1] = right;
+ }
+ EXPECT_FALSE(frame->muted());
+}
+
+void SetFiveOneData(int16_t front_left,
+ int16_t front_right,
+ int16_t center,
+ int16_t lfe,
+ int16_t side_left,
+ int16_t side_right,
+ AudioFrame* frame) {
+ ASSERT_LE(6 * frame->samples_per_channel(), frame->max_16bit_samples());
+ frame->num_channels_ = 6;
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel() * 6; i += 6) {
+ frame_data[i] = front_left;
+ frame_data[i + 1] = front_right;
+ frame_data[i + 2] = center;
+ frame_data[i + 3] = lfe;
+ frame_data[i + 4] = side_left;
+ frame_data[i + 5] = side_right;
+ }
+ EXPECT_FALSE(frame->muted());
+}
+
+void SetSevenOneData(int16_t front_left,
+ int16_t front_right,
+ int16_t center,
+ int16_t lfe,
+ int16_t side_left,
+ int16_t side_right,
+ int16_t back_left,
+ int16_t back_right,
+ AudioFrame* frame) {
+ ASSERT_LE(8 * frame->samples_per_channel(), frame->max_16bit_samples());
+ frame->num_channels_ = 8;
+ int16_t* frame_data = frame->mutable_data();
+ for (size_t i = 0; i < frame->samples_per_channel() * 8; i += 8) {
+ frame_data[i] = front_left;
+ frame_data[i + 1] = front_right;
+ frame_data[i + 2] = center;
+ frame_data[i + 3] = lfe;
+ frame_data[i + 4] = side_left;
+ frame_data[i + 5] = side_right;
+ frame_data[i + 6] = back_left;
+ frame_data[i + 7] = back_right;
+ }
+ EXPECT_FALSE(frame->muted());
+}
+
+bool AllSamplesEquals(int16_t sample, const AudioFrame* frame) {
+ const int16_t* frame_data = frame->data();
+ for (size_t i = 0; i < frame->samples_per_channel() * frame->num_channels();
+ i++) {
+ if (frame_data[i] != sample) {
+ return false;
+ }
+ }
+ return true;
+}
+
+void VerifyFramesAreEqual(const AudioFrame& frame1, const AudioFrame& frame2) {
+ EXPECT_EQ(frame1.num_channels(), frame2.num_channels());
+ EXPECT_EQ(frame1.samples_per_channel(), frame2.samples_per_channel());
+ const int16_t* frame1_data = frame1.data();
+ const int16_t* frame2_data = frame2.data();
+ for (size_t i = 0; i < frame1.samples_per_channel() * frame1.num_channels();
+ i++) {
+ EXPECT_EQ(frame1_data[i], frame2_data[i]);
+ }
+ EXPECT_EQ(frame1.muted(), frame2.muted());
+}
+
+} // namespace
+
+// Test all possible layout conversions can be constructed and mixed. Don't
+// care about the actual content, simply run through all mixing combinations
+// and ensure that nothing fails.
+TEST_F(ChannelMixerTest, ConstructAllPossibleLayouts) {
+ for (ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ input_layout <= CHANNEL_LAYOUT_MAX;
+ input_layout = static_cast<ChannelLayout>(input_layout + 1)) {
+ for (ChannelLayout output_layout = CHANNEL_LAYOUT_MONO;
+ output_layout <= CHANNEL_LAYOUT_MAX;
+ output_layout = static_cast<ChannelLayout>(output_layout + 1)) {
+ // DISCRETE, BITSTREAM can't be tested here based on the current approach.
+ // CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC is not mixable.
+ // Stereo down mix should never be the output layout.
+ if (input_layout == CHANNEL_LAYOUT_BITSTREAM ||
+ input_layout == CHANNEL_LAYOUT_DISCRETE ||
+ input_layout == CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC ||
+ output_layout == CHANNEL_LAYOUT_BITSTREAM ||
+ output_layout == CHANNEL_LAYOUT_DISCRETE ||
+ output_layout == CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC ||
+ output_layout == CHANNEL_LAYOUT_STEREO_DOWNMIX) {
+ continue;
+ }
+
+ rtc::StringBuilder ss;
+ ss << "Input Layout: " << input_layout
+ << ", Output Layout: " << output_layout;
+ SCOPED_TRACE(ss.str());
+ ChannelMixer mixer(input_layout, output_layout);
+
+ frame_.UpdateFrame(kTimestamp, nullptr, kSamplesPerChannel, kSampleRateHz,
+ AudioFrame::kNormalSpeech, AudioFrame::kVadActive,
+ ChannelLayoutToChannelCount(input_layout));
+ EXPECT_TRUE(frame_.muted());
+ mixer.Transform(&frame_);
+ }
+ }
+}
+
+// Ensure that the audio frame is untouched when input and output channel
+// layouts are identical, i.e., the transformation should have no effect.
+// Exclude invalid mixing combinations.
+TEST_F(ChannelMixerTest, NoMixingForIdenticalChannelLayouts) {
+ for (ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ input_layout <= CHANNEL_LAYOUT_MAX;
+ input_layout = static_cast<ChannelLayout>(input_layout + 1)) {
+ for (ChannelLayout output_layout = CHANNEL_LAYOUT_MONO;
+ output_layout <= CHANNEL_LAYOUT_MAX;
+ output_layout = static_cast<ChannelLayout>(output_layout + 1)) {
+ if (input_layout != output_layout ||
+ input_layout == CHANNEL_LAYOUT_BITSTREAM ||
+ input_layout == CHANNEL_LAYOUT_DISCRETE ||
+ input_layout == CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC ||
+ output_layout == CHANNEL_LAYOUT_STEREO_DOWNMIX) {
+ continue;
+ }
+ ChannelMixer mixer(input_layout, output_layout);
+ frame_.num_channels_ = ChannelLayoutToChannelCount(input_layout);
+ SetFrameData(99, &frame_);
+ mixer.Transform(&frame_);
+ EXPECT_EQ(ChannelLayoutToChannelCount(input_layout),
+ static_cast<int>(frame_.num_channels()));
+ EXPECT_TRUE(AllSamplesEquals(99, &frame_));
+ }
+ }
+}
+
+TEST_F(ChannelMixerTest, StereoToMono) {
+ ChannelMixer mixer(CHANNEL_LAYOUT_STEREO, CHANNEL_LAYOUT_MONO);
+ //
+ // Input: stereo
+ // LEFT RIGHT
+ // Output: mono CENTER 0.5 0.5
+ //
+ SetStereoData(7, 3, &frame_);
+ EXPECT_EQ(2u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(1u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_MONO, frame_.channel_layout());
+
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = frame_.samples_per_channel();
+ SetMonoData(5, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+
+ SetStereoData(-32768, -32768, &frame_);
+ EXPECT_EQ(2u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(1u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_MONO, frame_.channel_layout());
+ SetMonoData(-32768, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+}
+
+TEST_F(ChannelMixerTest, StereoToMonoMuted) {
+ ASSERT_TRUE(frame_.muted());
+ ChannelMixer mixer(CHANNEL_LAYOUT_STEREO, CHANNEL_LAYOUT_MONO);
+ mixer.Transform(&frame_);
+ EXPECT_EQ(1u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_MONO, frame_.channel_layout());
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(ChannelMixerTest, FiveOneToSevenOneMuted) {
+ ASSERT_TRUE(frame_.muted());
+ ChannelMixer mixer(CHANNEL_LAYOUT_5_1, CHANNEL_LAYOUT_7_1);
+ mixer.Transform(&frame_);
+ EXPECT_EQ(8u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_7_1, frame_.channel_layout());
+ EXPECT_TRUE(frame_.muted());
+}
+
+TEST_F(ChannelMixerTest, FiveOneToMono) {
+ ChannelMixer mixer(CHANNEL_LAYOUT_5_1, CHANNEL_LAYOUT_MONO);
+ //
+ // Input: 5.1
+ // LEFT RIGHT CENTER LFE SIDE_LEFT SIDE_RIGHT
+ // Output: mono CENTER 0.707 0.707 1 0.707 0.707 0.707
+ //
+ // a = [10, 20, 15, 2, 5, 5]
+ // b = [1/sqrt(2), 1/sqrt(2), 1.0, 1/sqrt(2), 1/sqrt(2), 1/sqrt(2)] =>
+ // a * b (dot product) = 44.69848480983499,
+ // which is truncated into 44 using 16 bit representation.
+ //
+ SetFiveOneData(10, 20, 15, 2, 5, 5, &frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(1u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_MONO, frame_.channel_layout());
+
+ AudioFrame mono_frame;
+ mono_frame.samples_per_channel_ = frame_.samples_per_channel();
+ SetMonoData(44, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+
+ SetFiveOneData(-32768, -32768, -32768, -32768, -32768, -32768, &frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(1u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_MONO, frame_.channel_layout());
+ SetMonoData(-32768, &mono_frame);
+ VerifyFramesAreEqual(mono_frame, frame_);
+}
+
+TEST_F(ChannelMixerTest, FiveOneToSevenOne) {
+ ChannelMixer mixer(CHANNEL_LAYOUT_5_1, CHANNEL_LAYOUT_7_1);
+ //
+ // Input: 5.1
+ // LEFT RIGHT CENTER LFE SIDE_LEFT SIDE_RIGHT
+ // Output: 7.1 LEFT 1 0 0 0 0 0
+ // RIGHT 0 1 0 0 0 0
+ // CENTER 0 0 1 0 0 0
+ // LFE 0 0 0 1 0 0
+ // SIDE_LEFT 0 0 0 0 1 0
+ // SIDE_RIGHT 0 0 0 0 0 1
+ // BACK_LEFT 0 0 0 0 0 0
+ // BACK_RIGHT 0 0 0 0 0 0
+ //
+ SetFiveOneData(10, 20, 15, 2, 5, 5, &frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(8u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_7_1, frame_.channel_layout());
+
+ AudioFrame seven_one_frame;
+ seven_one_frame.samples_per_channel_ = frame_.samples_per_channel();
+ SetSevenOneData(10, 20, 15, 2, 5, 5, 0, 0, &seven_one_frame);
+ VerifyFramesAreEqual(seven_one_frame, frame_);
+
+ SetFiveOneData(-32768, 32767, -32768, 32767, -32768, 32767, &frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(8u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_7_1, frame_.channel_layout());
+ SetSevenOneData(-32768, 32767, -32768, 32767, -32768, 32767, 0, 0,
+ &seven_one_frame);
+ VerifyFramesAreEqual(seven_one_frame, frame_);
+}
+
+TEST_F(ChannelMixerTest, FiveOneBackToStereo) {
+ ChannelMixer mixer(CHANNEL_LAYOUT_5_1_BACK, CHANNEL_LAYOUT_STEREO);
+ //
+ // Input: 5.1
+ // LEFT RIGHT CENTER LFE BACK_LEFT BACK_RIGHT
+ // Output: stereo LEFT 1 0 0.707 0.707 0.707 0
+ // RIGHT 0 1 0.707 0.707 0 0.707
+ //
+ SetFiveOneData(20, 30, 15, 2, 5, 5, &frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(2u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_STEREO, frame_.channel_layout());
+
+ AudioFrame stereo_frame;
+ stereo_frame.samples_per_channel_ = frame_.samples_per_channel();
+ SetStereoData(35, 45, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, frame_);
+
+ SetFiveOneData(-32768, -32768, -32768, -32768, -32768, -32768, &frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(2u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_STEREO, frame_.channel_layout());
+ SetStereoData(-32768, -32768, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, frame_);
+}
+
+TEST_F(ChannelMixerTest, MonoToStereo) {
+ ChannelMixer mixer(CHANNEL_LAYOUT_MONO, CHANNEL_LAYOUT_STEREO);
+ //
+ // Input: mono
+ // CENTER
+ // Output: stereo LEFT 1
+ // RIGHT 1
+ //
+ SetMonoData(44, &frame_);
+ EXPECT_EQ(1u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(2u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_STEREO, frame_.channel_layout());
+
+ AudioFrame stereo_frame;
+ stereo_frame.samples_per_channel_ = frame_.samples_per_channel();
+ SetStereoData(44, 44, &stereo_frame);
+ VerifyFramesAreEqual(stereo_frame, frame_);
+}
+
+TEST_F(ChannelMixerTest, StereoToFiveOne) {
+ ChannelMixer mixer(CHANNEL_LAYOUT_STEREO, CHANNEL_LAYOUT_5_1);
+ //
+ // Input: Stereo
+ // LEFT RIGHT
+ // Output: 5.1 LEFT 1 0
+ // RIGHT 0 1
+ // CENTER 0 0
+ // LFE 0 0
+ // SIDE_LEFT 0 0
+ // SIDE_RIGHT 0 0
+ //
+ SetStereoData(50, 60, &frame_);
+ EXPECT_EQ(2u, frame_.num_channels());
+ mixer.Transform(&frame_);
+ EXPECT_EQ(6u, frame_.num_channels());
+ EXPECT_EQ(CHANNEL_LAYOUT_5_1, frame_.channel_layout());
+
+ AudioFrame five_one_frame;
+ five_one_frame.samples_per_channel_ = frame_.samples_per_channel();
+ SetFiveOneData(50, 60, 0, 0, 0, 0, &five_one_frame);
+ VerifyFramesAreEqual(five_one_frame, frame_);
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/utility/channel_mixing_matrix.cc b/third_party/libwebrtc/audio/utility/channel_mixing_matrix.cc
new file mode 100644
index 0000000000..1244653f63
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/channel_mixing_matrix.cc
@@ -0,0 +1,333 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/utility/channel_mixing_matrix.h"
+
+#include <stddef.h>
+
+#include <algorithm>
+
+#include "audio/utility/channel_mixer.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "system_wrappers/include/field_trial.h"
+
+namespace webrtc {
+
+namespace {
+
+// Selects the default usage of VoIP channel mapping adjustments.
+bool UseChannelMappingAdjustmentsByDefault() {
+ return !field_trial::IsEnabled(
+ "WebRTC-VoIPChannelRemixingAdjustmentKillSwitch");
+}
+
+} // namespace
+
+static void ValidateLayout(ChannelLayout layout) {
+ RTC_CHECK_NE(layout, CHANNEL_LAYOUT_NONE);
+ RTC_CHECK_LE(layout, CHANNEL_LAYOUT_MAX);
+ RTC_CHECK_NE(layout, CHANNEL_LAYOUT_UNSUPPORTED);
+ RTC_CHECK_NE(layout, CHANNEL_LAYOUT_DISCRETE);
+ RTC_CHECK_NE(layout, CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC);
+
+ // Verify there's at least one channel. Should always be true here by virtue
+ // of not being one of the invalid layouts, but lets double check to be sure.
+ int channel_count = ChannelLayoutToChannelCount(layout);
+ RTC_DCHECK_GT(channel_count, 0);
+
+ // If we have more than one channel, verify a symmetric layout for sanity.
+ // The unit test will verify all possible layouts, so this can be a DCHECK.
+ // Symmetry allows simplifying the matrix building code by allowing us to
+ // assume that if one channel of a pair exists, the other will too.
+ if (channel_count > 1) {
+ // Assert that LEFT exists if and only if RIGHT exists, and so on.
+ RTC_DCHECK_EQ(ChannelOrder(layout, LEFT) >= 0,
+ ChannelOrder(layout, RIGHT) >= 0);
+ RTC_DCHECK_EQ(ChannelOrder(layout, SIDE_LEFT) >= 0,
+ ChannelOrder(layout, SIDE_RIGHT) >= 0);
+ RTC_DCHECK_EQ(ChannelOrder(layout, BACK_LEFT) >= 0,
+ ChannelOrder(layout, BACK_RIGHT) >= 0);
+ RTC_DCHECK_EQ(ChannelOrder(layout, LEFT_OF_CENTER) >= 0,
+ ChannelOrder(layout, RIGHT_OF_CENTER) >= 0);
+ } else {
+ RTC_DCHECK_EQ(layout, CHANNEL_LAYOUT_MONO);
+ }
+}
+
+ChannelMixingMatrix::ChannelMixingMatrix(ChannelLayout input_layout,
+ int input_channels,
+ ChannelLayout output_layout,
+ int output_channels)
+ : use_voip_channel_mapping_adjustments_(
+ UseChannelMappingAdjustmentsByDefault()),
+ input_layout_(input_layout),
+ input_channels_(input_channels),
+ output_layout_(output_layout),
+ output_channels_(output_channels) {
+ // Stereo down mix should never be the output layout.
+ RTC_CHECK_NE(output_layout, CHANNEL_LAYOUT_STEREO_DOWNMIX);
+
+ // Verify that the layouts are supported
+ if (input_layout != CHANNEL_LAYOUT_DISCRETE)
+ ValidateLayout(input_layout);
+ if (output_layout != CHANNEL_LAYOUT_DISCRETE)
+ ValidateLayout(output_layout);
+
+ // Special case for 5.0, 5.1 with back channels when upmixed to 7.0, 7.1,
+ // which should map the back LR to side LR.
+ if (input_layout_ == CHANNEL_LAYOUT_5_0_BACK &&
+ output_layout_ == CHANNEL_LAYOUT_7_0) {
+ input_layout_ = CHANNEL_LAYOUT_5_0;
+ } else if (input_layout_ == CHANNEL_LAYOUT_5_1_BACK &&
+ output_layout_ == CHANNEL_LAYOUT_7_1) {
+ input_layout_ = CHANNEL_LAYOUT_5_1;
+ }
+}
+
+ChannelMixingMatrix::~ChannelMixingMatrix() = default;
+
+bool ChannelMixingMatrix::CreateTransformationMatrix(
+ std::vector<std::vector<float>>* matrix) {
+ matrix_ = matrix;
+
+ // Size out the initial matrix.
+ matrix_->reserve(output_channels_);
+ for (int output_ch = 0; output_ch < output_channels_; ++output_ch)
+ matrix_->push_back(std::vector<float>(input_channels_, 0));
+
+ // First check for discrete case.
+ if (input_layout_ == CHANNEL_LAYOUT_DISCRETE ||
+ output_layout_ == CHANNEL_LAYOUT_DISCRETE) {
+ // If the number of input channels is more than output channels, then
+ // copy as many as we can then drop the remaining input channels.
+ // If the number of input channels is less than output channels, then
+ // copy them all, then zero out the remaining output channels.
+ int passthrough_channels = std::min(input_channels_, output_channels_);
+ for (int i = 0; i < passthrough_channels; ++i)
+ (*matrix_)[i][i] = 1;
+
+ return true;
+ }
+
+ // If specified, use adjusted channel mapping for the VoIP scenario.
+ if (use_voip_channel_mapping_adjustments_ &&
+ input_layout_ == CHANNEL_LAYOUT_MONO &&
+ ChannelLayoutToChannelCount(output_layout_) >= 2) {
+ // Only place the mono input in the front left and right channels.
+ (*matrix_)[0][0] = 1.f;
+ (*matrix_)[1][0] = 1.f;
+
+ for (size_t output_ch = 2; output_ch < matrix_->size(); ++output_ch) {
+ (*matrix_)[output_ch][0] = 0.f;
+ }
+ return true;
+ }
+
+ // Route matching channels and figure out which ones aren't accounted for.
+ for (Channels ch = LEFT; ch < CHANNELS_MAX + 1;
+ ch = static_cast<Channels>(ch + 1)) {
+ int input_ch_index = ChannelOrder(input_layout_, ch);
+ if (input_ch_index < 0)
+ continue;
+
+ int output_ch_index = ChannelOrder(output_layout_, ch);
+ if (output_ch_index < 0) {
+ unaccounted_inputs_.push_back(ch);
+ continue;
+ }
+
+ RTC_DCHECK_LT(static_cast<size_t>(output_ch_index), matrix_->size());
+ RTC_DCHECK_LT(static_cast<size_t>(input_ch_index),
+ (*matrix_)[output_ch_index].size());
+ (*matrix_)[output_ch_index][input_ch_index] = 1;
+ }
+
+ // If all input channels are accounted for, there's nothing left to do.
+ if (unaccounted_inputs_.empty()) {
+ // Since all output channels map directly to inputs we can optimize.
+ return true;
+ }
+
+ // Mix front LR into center.
+ if (IsUnaccounted(LEFT)) {
+ // When down mixing to mono from stereo, we need to be careful of full scale
+ // stereo mixes. Scaling by 1 / sqrt(2) here will likely lead to clipping
+ // so we use 1 / 2 instead.
+ float scale =
+ (output_layout_ == CHANNEL_LAYOUT_MONO && input_channels_ == 2)
+ ? 0.5
+ : ChannelMixer::kHalfPower;
+ Mix(LEFT, CENTER, scale);
+ Mix(RIGHT, CENTER, scale);
+ }
+
+ // Mix center into front LR.
+ if (IsUnaccounted(CENTER)) {
+ // When up mixing from mono, just do a copy to front LR.
+ float scale =
+ (input_layout_ == CHANNEL_LAYOUT_MONO) ? 1 : ChannelMixer::kHalfPower;
+ MixWithoutAccounting(CENTER, LEFT, scale);
+ Mix(CENTER, RIGHT, scale);
+ }
+
+ // Mix back LR into: side LR || back center || front LR || front center.
+ if (IsUnaccounted(BACK_LEFT)) {
+ if (HasOutputChannel(SIDE_LEFT)) {
+ // If the input has side LR, mix back LR into side LR, but instead if the
+ // input doesn't have side LR (but output does) copy back LR to side LR.
+ float scale = HasInputChannel(SIDE_LEFT) ? ChannelMixer::kHalfPower : 1;
+ Mix(BACK_LEFT, SIDE_LEFT, scale);
+ Mix(BACK_RIGHT, SIDE_RIGHT, scale);
+ } else if (HasOutputChannel(BACK_CENTER)) {
+ // Mix back LR into back center.
+ Mix(BACK_LEFT, BACK_CENTER, ChannelMixer::kHalfPower);
+ Mix(BACK_RIGHT, BACK_CENTER, ChannelMixer::kHalfPower);
+ } else if (output_layout_ > CHANNEL_LAYOUT_MONO) {
+ // Mix back LR into front LR.
+ Mix(BACK_LEFT, LEFT, ChannelMixer::kHalfPower);
+ Mix(BACK_RIGHT, RIGHT, ChannelMixer::kHalfPower);
+ } else {
+ // Mix back LR into front center.
+ Mix(BACK_LEFT, CENTER, ChannelMixer::kHalfPower);
+ Mix(BACK_RIGHT, CENTER, ChannelMixer::kHalfPower);
+ }
+ }
+
+ // Mix side LR into: back LR || back center || front LR || front center.
+ if (IsUnaccounted(SIDE_LEFT)) {
+ if (HasOutputChannel(BACK_LEFT)) {
+ // If the input has back LR, mix side LR into back LR, but instead if the
+ // input doesn't have back LR (but output does) copy side LR to back LR.
+ float scale = HasInputChannel(BACK_LEFT) ? ChannelMixer::kHalfPower : 1;
+ Mix(SIDE_LEFT, BACK_LEFT, scale);
+ Mix(SIDE_RIGHT, BACK_RIGHT, scale);
+ } else if (HasOutputChannel(BACK_CENTER)) {
+ // Mix side LR into back center.
+ Mix(SIDE_LEFT, BACK_CENTER, ChannelMixer::kHalfPower);
+ Mix(SIDE_RIGHT, BACK_CENTER, ChannelMixer::kHalfPower);
+ } else if (output_layout_ > CHANNEL_LAYOUT_MONO) {
+ // Mix side LR into front LR.
+ Mix(SIDE_LEFT, LEFT, ChannelMixer::kHalfPower);
+ Mix(SIDE_RIGHT, RIGHT, ChannelMixer::kHalfPower);
+ } else {
+ // Mix side LR into front center.
+ Mix(SIDE_LEFT, CENTER, ChannelMixer::kHalfPower);
+ Mix(SIDE_RIGHT, CENTER, ChannelMixer::kHalfPower);
+ }
+ }
+
+ // Mix back center into: back LR || side LR || front LR || front center.
+ if (IsUnaccounted(BACK_CENTER)) {
+ if (HasOutputChannel(BACK_LEFT)) {
+ // Mix back center into back LR.
+ MixWithoutAccounting(BACK_CENTER, BACK_LEFT, ChannelMixer::kHalfPower);
+ Mix(BACK_CENTER, BACK_RIGHT, ChannelMixer::kHalfPower);
+ } else if (HasOutputChannel(SIDE_LEFT)) {
+ // Mix back center into side LR.
+ MixWithoutAccounting(BACK_CENTER, SIDE_LEFT, ChannelMixer::kHalfPower);
+ Mix(BACK_CENTER, SIDE_RIGHT, ChannelMixer::kHalfPower);
+ } else if (output_layout_ > CHANNEL_LAYOUT_MONO) {
+ // Mix back center into front LR.
+ // TODO(dalecurtis): Not sure about these values?
+ MixWithoutAccounting(BACK_CENTER, LEFT, ChannelMixer::kHalfPower);
+ Mix(BACK_CENTER, RIGHT, ChannelMixer::kHalfPower);
+ } else {
+ // Mix back center into front center.
+ // TODO(dalecurtis): Not sure about these values?
+ Mix(BACK_CENTER, CENTER, ChannelMixer::kHalfPower);
+ }
+ }
+
+ // Mix LR of center into: front LR || front center.
+ if (IsUnaccounted(LEFT_OF_CENTER)) {
+ if (HasOutputChannel(LEFT)) {
+ // Mix LR of center into front LR.
+ Mix(LEFT_OF_CENTER, LEFT, ChannelMixer::kHalfPower);
+ Mix(RIGHT_OF_CENTER, RIGHT, ChannelMixer::kHalfPower);
+ } else {
+ // Mix LR of center into front center.
+ Mix(LEFT_OF_CENTER, CENTER, ChannelMixer::kHalfPower);
+ Mix(RIGHT_OF_CENTER, CENTER, ChannelMixer::kHalfPower);
+ }
+ }
+
+ // Mix LFE into: front center || front LR.
+ if (IsUnaccounted(LFE)) {
+ if (!HasOutputChannel(CENTER)) {
+ // Mix LFE into front LR.
+ MixWithoutAccounting(LFE, LEFT, ChannelMixer::kHalfPower);
+ Mix(LFE, RIGHT, ChannelMixer::kHalfPower);
+ } else {
+ // Mix LFE into front center.
+ Mix(LFE, CENTER, ChannelMixer::kHalfPower);
+ }
+ }
+
+ // All channels should now be accounted for.
+ RTC_DCHECK(unaccounted_inputs_.empty());
+
+ // See if the output `matrix_` is simply a remapping matrix. If each input
+ // channel maps to a single output channel we can simply remap. Doing this
+ // programmatically is less fragile than logic checks on channel mappings.
+ for (int output_ch = 0; output_ch < output_channels_; ++output_ch) {
+ int input_mappings = 0;
+ for (int input_ch = 0; input_ch < input_channels_; ++input_ch) {
+ // We can only remap if each row contains a single scale of 1. I.e., each
+ // output channel is mapped from a single unscaled input channel.
+ if ((*matrix_)[output_ch][input_ch] != 1 || ++input_mappings > 1)
+ return false;
+ }
+ }
+
+ // If we've gotten here, `matrix_` is simply a remapping.
+ return true;
+}
+
+void ChannelMixingMatrix::AccountFor(Channels ch) {
+ unaccounted_inputs_.erase(
+ std::find(unaccounted_inputs_.begin(), unaccounted_inputs_.end(), ch));
+}
+
+bool ChannelMixingMatrix::IsUnaccounted(Channels ch) const {
+ return std::find(unaccounted_inputs_.begin(), unaccounted_inputs_.end(),
+ ch) != unaccounted_inputs_.end();
+}
+
+bool ChannelMixingMatrix::HasInputChannel(Channels ch) const {
+ return ChannelOrder(input_layout_, ch) >= 0;
+}
+
+bool ChannelMixingMatrix::HasOutputChannel(Channels ch) const {
+ return ChannelOrder(output_layout_, ch) >= 0;
+}
+
+void ChannelMixingMatrix::Mix(Channels input_ch,
+ Channels output_ch,
+ float scale) {
+ MixWithoutAccounting(input_ch, output_ch, scale);
+ AccountFor(input_ch);
+}
+
+void ChannelMixingMatrix::MixWithoutAccounting(Channels input_ch,
+ Channels output_ch,
+ float scale) {
+ int input_ch_index = ChannelOrder(input_layout_, input_ch);
+ int output_ch_index = ChannelOrder(output_layout_, output_ch);
+
+ RTC_DCHECK(IsUnaccounted(input_ch));
+ RTC_DCHECK_GE(input_ch_index, 0);
+ RTC_DCHECK_GE(output_ch_index, 0);
+
+ RTC_DCHECK_EQ((*matrix_)[output_ch_index][input_ch_index], 0);
+ (*matrix_)[output_ch_index][input_ch_index] = scale;
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/utility/channel_mixing_matrix.h b/third_party/libwebrtc/audio/utility/channel_mixing_matrix.h
new file mode 100644
index 0000000000..ee00860846
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/channel_mixing_matrix.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_UTILITY_CHANNEL_MIXING_MATRIX_H_
+#define AUDIO_UTILITY_CHANNEL_MIXING_MATRIX_H_
+
+#include <vector>
+
+#include "api/audio/channel_layout.h"
+
+namespace webrtc {
+
+class ChannelMixingMatrix {
+ public:
+ ChannelMixingMatrix(ChannelLayout input_layout,
+ int input_channels,
+ ChannelLayout output_layout,
+ int output_channels);
+
+ ~ChannelMixingMatrix();
+
+ // Create the transformation matrix of input channels to output channels.
+ // Updates the empty matrix with the transformation, and returns true
+ // if the transformation is just a remapping of channels (no mixing).
+ // The size of `matrix` is `output_channels` x `input_channels`, i.e., the
+ // number of rows equals the number of output channels and the number of
+ // columns corresponds to the number of input channels.
+ // This file is derived from Chromium's media/base/channel_mixing_matrix.h.
+ bool CreateTransformationMatrix(std::vector<std::vector<float>>* matrix);
+
+ private:
+ const bool use_voip_channel_mapping_adjustments_;
+
+ // Result transformation of input channels to output channels
+ std::vector<std::vector<float>>* matrix_;
+
+ // Input and output channel layout provided during construction.
+ ChannelLayout input_layout_;
+ int input_channels_;
+ ChannelLayout output_layout_;
+ int output_channels_;
+
+ // Helper variable for tracking which inputs are currently unaccounted,
+ // should be empty after construction completes.
+ std::vector<Channels> unaccounted_inputs_;
+
+ // Helper methods for managing unaccounted input channels.
+ void AccountFor(Channels ch);
+ bool IsUnaccounted(Channels ch) const;
+
+ // Helper methods for checking if `ch` exists in either `input_layout_` or
+ // `output_layout_` respectively.
+ bool HasInputChannel(Channels ch) const;
+ bool HasOutputChannel(Channels ch) const;
+
+ // Helper methods for updating `matrix_` with the proper value for
+ // mixing `input_ch` into `output_ch`. MixWithoutAccounting() does not
+ // remove the channel from `unaccounted_inputs_`.
+ void Mix(Channels input_ch, Channels output_ch, float scale);
+ void MixWithoutAccounting(Channels input_ch, Channels output_ch, float scale);
+
+ // Delete the copy constructor and assignment operator.
+ ChannelMixingMatrix(const ChannelMixingMatrix& other) = delete;
+ ChannelMixingMatrix& operator=(const ChannelMixingMatrix& other) = delete;
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_UTILITY_CHANNEL_MIXING_MATRIX_H_
diff --git a/third_party/libwebrtc/audio/utility/channel_mixing_matrix_unittest.cc b/third_party/libwebrtc/audio/utility/channel_mixing_matrix_unittest.cc
new file mode 100644
index 0000000000..a4efb4fd38
--- /dev/null
+++ b/third_party/libwebrtc/audio/utility/channel_mixing_matrix_unittest.cc
@@ -0,0 +1,476 @@
+/*
+ * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/utility/channel_mixing_matrix.h"
+
+#include <stddef.h>
+
+#include "audio/utility/channel_mixer.h"
+#include "rtc_base/arraysize.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/strings/string_builder.h"
+#include "test/field_trial.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+
+// Test all possible layout conversions can be constructed and mixed.
+// Also ensure that the channel matrix fulfill certain conditions when remapping
+// is supported.
+TEST(ChannelMixingMatrixTest, ConstructAllPossibleLayouts) {
+ for (ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ input_layout <= CHANNEL_LAYOUT_MAX;
+ input_layout = static_cast<ChannelLayout>(input_layout + 1)) {
+ for (ChannelLayout output_layout = CHANNEL_LAYOUT_MONO;
+ output_layout <= CHANNEL_LAYOUT_MAX;
+ output_layout = static_cast<ChannelLayout>(output_layout + 1)) {
+ // DISCRETE, BITSTREAM can't be tested here based on the current approach.
+ // CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC is not mixable.
+ // Stereo down mix should never be the output layout.
+ if (input_layout == CHANNEL_LAYOUT_BITSTREAM ||
+ input_layout == CHANNEL_LAYOUT_DISCRETE ||
+ input_layout == CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC ||
+ output_layout == CHANNEL_LAYOUT_BITSTREAM ||
+ output_layout == CHANNEL_LAYOUT_DISCRETE ||
+ output_layout == CHANNEL_LAYOUT_STEREO_AND_KEYBOARD_MIC ||
+ output_layout == CHANNEL_LAYOUT_STEREO_DOWNMIX) {
+ continue;
+ }
+
+ rtc::StringBuilder ss;
+ ss << "Input Layout: " << input_layout
+ << ", Output Layout: " << output_layout;
+ SCOPED_TRACE(ss.str());
+ ChannelMixingMatrix matrix_builder(
+ input_layout, ChannelLayoutToChannelCount(input_layout),
+ output_layout, ChannelLayoutToChannelCount(output_layout));
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ if (remapping) {
+ // Also ensure that (when remapping can take place), a maximum of one
+ // input channel is included per output. This knowledge will simplify
+ // the channel mixing algorithm since it allows us to find the only
+ // scale factor which equals 1.0 and copy that input to its
+ // corresponding output. If no such factor can be found, the
+ // corresponding output can be set to zero.
+ for (int i = 0; i < output_channels; i++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[i].size());
+ int num_input_channels_accounted_for_per_output = 0;
+ for (int j = 0; j < input_channels; j++) {
+ float scale = matrix[i][j];
+ if (scale > 0) {
+ EXPECT_EQ(scale, 1.0f);
+ num_input_channels_accounted_for_per_output++;
+ }
+ }
+ // Each output channel shall contain contribution from one or less
+ // input channels.
+ EXPECT_LE(num_input_channels_accounted_for_per_output, 1);
+ }
+ }
+ }
+ }
+}
+
+// Verify channels are mixed and scaled correctly.
+TEST(ChannelMixingMatrixTest, StereoToMono) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_STEREO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_MONO;
+ ChannelMixingMatrix matrix_builder(
+ input_layout, ChannelLayoutToChannelCount(input_layout), output_layout,
+ ChannelLayoutToChannelCount(output_layout));
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Input: stereo
+ // LEFT RIGHT
+ // Output: mono CENTER 0.5 0.5
+ //
+ EXPECT_FALSE(remapping);
+ EXPECT_EQ(1u, matrix.size());
+ EXPECT_EQ(2u, matrix[0].size());
+ EXPECT_EQ(0.5f, matrix[0][0]);
+ EXPECT_EQ(0.5f, matrix[0][1]);
+}
+
+TEST(ChannelMixingMatrixTest, MonoToStereo) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_STEREO;
+ ChannelMixingMatrix matrix_builder(
+ input_layout, ChannelLayoutToChannelCount(input_layout), output_layout,
+ ChannelLayoutToChannelCount(output_layout));
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Input: mono
+ // CENTER
+ // Output: stereo LEFT 1
+ // RIGHT 1
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(2u, matrix.size());
+ EXPECT_EQ(1u, matrix[0].size());
+ EXPECT_EQ(1.0f, matrix[0][0]);
+ EXPECT_EQ(1u, matrix[1].size());
+ EXPECT_EQ(1.0f, matrix[1][0]);
+}
+
+TEST(ChannelMixingMatrixTest, MonoToTwoOneWithoutVoIPAdjustments) {
+ test::ScopedFieldTrials field_trials(
+ "WebRTC-VoIPChannelRemixingAdjustmentKillSwitch/Enabled/");
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_2_1;
+ ChannelMixingMatrix matrix_builder(
+ input_layout, ChannelLayoutToChannelCount(input_layout), output_layout,
+ ChannelLayoutToChannelCount(output_layout));
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Input: mono
+ // CENTER
+ // Output: 2.1 FRONT_LEFT 1
+ // FRONT_RIGHT 1
+ // BACK_CENTER 0
+ //
+ EXPECT_FALSE(remapping);
+ EXPECT_EQ(3u, matrix.size());
+ EXPECT_EQ(1u, matrix[0].size());
+ EXPECT_EQ(1.0f, matrix[0][0]);
+ EXPECT_EQ(1.0f, matrix[1][0]);
+ EXPECT_EQ(0.0f, matrix[2][0]);
+}
+
+TEST(ChannelMixingMatrixTest, MonoToTwoOneWithVoIPAdjustments) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_2_1;
+ ChannelMixingMatrix matrix_builder(
+ input_layout, ChannelLayoutToChannelCount(input_layout), output_layout,
+ ChannelLayoutToChannelCount(output_layout));
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Input: mono
+ // CENTER
+ // Output: 2.1 FRONT_LEFT 1
+ // FRONT_RIGHT 1
+ // BACK_CENTER 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(3u, matrix.size());
+ EXPECT_EQ(1u, matrix[0].size());
+ EXPECT_EQ(1.0f, matrix[0][0]);
+ EXPECT_EQ(1.0f, matrix[1][0]);
+ EXPECT_EQ(0.0f, matrix[2][0]);
+}
+
+TEST(ChannelMixingMatrixTest, MonoToFiveOneWithoutVoIPAdjustments) {
+ test::ScopedFieldTrials field_trials(
+ "WebRTC-VoIPChannelRemixingAdjustmentKillSwitch/Enabled/");
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_5_1;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+ // Input: mono
+ // CENTER
+ // Output: 5.1 LEFT 0
+ // RIGHT 0
+ // CENTER 1
+ // LFE 0
+ // SIDE_LEFT 0
+ // SIDE_RIGHT 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int n = 0; n < output_channels; n++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[n].size());
+ if (n == CENTER) {
+ EXPECT_EQ(1.0f, matrix[CENTER][0]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[n][0]);
+ }
+ }
+}
+
+TEST(ChannelMixingMatrixTest, MonoToFiveOneWithVoIPAdjustments) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_5_1;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+ // Input: mono
+ // CENTER
+ // Output: 5.1 LEFT 1
+ // RIGHT 1
+ // CENTER 0
+ // LFE 0
+ // SIDE_LEFT 0
+ // SIDE_RIGHT 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int n = 0; n < output_channels; n++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[n].size());
+ if (n == LEFT || n == RIGHT) {
+ EXPECT_EQ(1.0f, matrix[n][0]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[n][0]);
+ }
+ }
+}
+
+TEST(ChannelMixingMatrixTest, MonoToSevenOneWithoutVoIPAdjustments) {
+ test::ScopedFieldTrials field_trials(
+ "WebRTC-VoIPChannelRemixingAdjustmentKillSwitch/Enabled/");
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_7_1;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+ // Input: mono
+ // CENTER
+ // Output: 7.1 LEFT 0
+ // RIGHT 0
+ // CENTER 1
+ // LFE 0
+ // SIDE_LEFT 0
+ // SIDE_RIGHT 0
+ // BACK_LEFT 0
+ // BACK_RIGHT 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int n = 0; n < output_channels; n++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[n].size());
+ if (n == CENTER) {
+ EXPECT_EQ(1.0f, matrix[CENTER][0]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[n][0]);
+ }
+ }
+}
+
+TEST(ChannelMixingMatrixTest, MonoToSevenOneWithVoIPAdjustments) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_MONO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_7_1;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+ // Input: mono
+ // CENTER
+ // Output: 7.1 LEFT 1
+ // RIGHT 1
+ // CENTER 0
+ // LFE 0
+ // SIDE_LEFT 0
+ // SIDE_RIGHT 0
+ // BACK_LEFT 0
+ // BACK_RIGHT 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int n = 0; n < output_channels; n++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[n].size());
+ if (n == LEFT || n == RIGHT) {
+ EXPECT_EQ(1.0f, matrix[n][0]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[n][0]);
+ }
+ }
+}
+
+TEST(ChannelMixingMatrixTest, FiveOneToMono) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_5_1;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_MONO;
+ ChannelMixingMatrix matrix_builder(
+ input_layout, ChannelLayoutToChannelCount(input_layout), output_layout,
+ ChannelLayoutToChannelCount(output_layout));
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Note: 1/sqrt(2) is shown as 0.707.
+ //
+ // Input: 5.1
+ // LEFT RIGHT CENTER LFE SIDE_LEFT SIDE_RIGHT
+ // Output: mono CENTER 0.707 0.707 1 0.707 0.707 0.707
+ //
+ EXPECT_FALSE(remapping);
+ EXPECT_EQ(1u, matrix.size());
+ EXPECT_EQ(6u, matrix[0].size());
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[0][0]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[0][1]);
+ // The center channel will be mixed at scale 1.
+ EXPECT_EQ(1.0f, matrix[0][2]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[0][3]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[0][4]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[0][5]);
+}
+
+TEST(ChannelMixingMatrixTest, FiveOneBackToStereo) {
+ // Front L, Front R, Front C, LFE, Back L, Back R
+ ChannelLayout input_layout = CHANNEL_LAYOUT_5_1_BACK;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_STEREO;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Note: 1/sqrt(2) is shown as 0.707.
+ // Note: The Channels enumerator is given by {LEFT = 0, RIGHT, CENTER, LFE,
+ // BACK_LEFT, BACK_RIGHT,...}, hence we can use the enumerator values as
+ // indexes in the matrix when verifying the scaling factors.
+ //
+ // Input: 5.1
+ // LEFT RIGHT CENTER LFE BACK_LEFT BACK_RIGHT
+ // Output: stereo LEFT 1 0 0.707 0.707 0.707 0
+ // RIGHT 0 1 0.707 0.707 0 0.707
+ //
+ EXPECT_FALSE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[LEFT].size());
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[RIGHT].size());
+ EXPECT_EQ(1.0f, matrix[LEFT][LEFT]);
+ EXPECT_EQ(1.0f, matrix[RIGHT][RIGHT]);
+ EXPECT_EQ(0.0f, matrix[LEFT][RIGHT]);
+ EXPECT_EQ(0.0f, matrix[RIGHT][LEFT]);
+ EXPECT_EQ(0.0f, matrix[LEFT][BACK_RIGHT]);
+ EXPECT_EQ(0.0f, matrix[RIGHT][BACK_LEFT]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[LEFT][CENTER]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[LEFT][LFE]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[LEFT][BACK_LEFT]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[RIGHT][CENTER]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[RIGHT][LFE]);
+ EXPECT_FLOAT_EQ(ChannelMixer::kHalfPower, matrix[RIGHT][BACK_RIGHT]);
+}
+
+TEST(ChannelMixingMatrixTest, FiveOneToSevenOne) {
+ // Front L, Front R, Front C, LFE, Side L, Side R
+ ChannelLayout input_layout = CHANNEL_LAYOUT_5_1;
+ // Front L, Front R, Front C, LFE, Side L, Side R, Back L, Back R
+ ChannelLayout output_layout = CHANNEL_LAYOUT_7_1;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Input: 5.1
+ // LEFT RIGHT CENTER LFE SIDE_LEFT SIDE_RIGHT
+ // Output: 7.1 LEFT 1 0 0 0 0 0
+ // RIGHT 0 1 0 0 0 0
+ // CENTER 0 0 1 0 0 0
+ // LFE 0 0 0 1 0 0
+ // SIDE_LEFT 0 0 0 0 1 0
+ // SIDE_RIGHT 0 0 0 0 0 1
+ // BACK_LEFT 0 0 0 0 0 0
+ // BACK_RIGHT 0 0 0 0 0 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int i = 0; i < output_channels; i++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[i].size());
+ for (int j = 0; j < input_channels; j++) {
+ if (i == j) {
+ EXPECT_EQ(1.0f, matrix[i][j]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[i][j]);
+ }
+ }
+ }
+}
+
+TEST(ChannelMixingMatrixTest, StereoToFiveOne) {
+ ChannelLayout input_layout = CHANNEL_LAYOUT_STEREO;
+ ChannelLayout output_layout = CHANNEL_LAYOUT_5_1;
+ const int input_channels = ChannelLayoutToChannelCount(input_layout);
+ const int output_channels = ChannelLayoutToChannelCount(output_layout);
+ ChannelMixingMatrix matrix_builder(input_layout, input_channels,
+ output_layout, output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+
+ // Input: Stereo
+ // LEFT RIGHT
+ // Output: 5.1 LEFT 1 0
+ // RIGHT 0 1
+ // CENTER 0 0
+ // LFE 0 0
+ // SIDE_LEFT 0 0
+ // SIDE_RIGHT 0 0
+ //
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int n = 0; n < output_channels; n++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[n].size());
+ if (n == LEFT) {
+ EXPECT_EQ(1.0f, matrix[LEFT][LEFT]);
+ EXPECT_EQ(0.0f, matrix[LEFT][RIGHT]);
+ } else if (n == RIGHT) {
+ EXPECT_EQ(0.0f, matrix[RIGHT][LEFT]);
+ EXPECT_EQ(1.0f, matrix[RIGHT][RIGHT]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[n][LEFT]);
+ EXPECT_EQ(0.0f, matrix[n][RIGHT]);
+ }
+ }
+}
+
+TEST(ChannelMixingMatrixTest, DiscreteToDiscrete) {
+ const struct {
+ int input_channels;
+ int output_channels;
+ } test_case[] = {
+ {2, 2},
+ {2, 5},
+ {5, 2},
+ };
+
+ for (size_t n = 0; n < arraysize(test_case); n++) {
+ int input_channels = test_case[n].input_channels;
+ int output_channels = test_case[n].output_channels;
+ ChannelMixingMatrix matrix_builder(CHANNEL_LAYOUT_DISCRETE, input_channels,
+ CHANNEL_LAYOUT_DISCRETE,
+ output_channels);
+ std::vector<std::vector<float>> matrix;
+ bool remapping = matrix_builder.CreateTransformationMatrix(&matrix);
+ EXPECT_TRUE(remapping);
+ EXPECT_EQ(static_cast<size_t>(output_channels), matrix.size());
+ for (int i = 0; i < output_channels; i++) {
+ EXPECT_EQ(static_cast<size_t>(input_channels), matrix[i].size());
+ for (int j = 0; j < input_channels; j++) {
+ if (i == j) {
+ EXPECT_EQ(1.0f, matrix[i][j]);
+ } else {
+ EXPECT_EQ(0.0f, matrix[i][j]);
+ }
+ }
+ }
+ }
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/BUILD.gn b/third_party/libwebrtc/audio/voip/BUILD.gn
new file mode 100644
index 0000000000..e807e2276b
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/BUILD.gn
@@ -0,0 +1,103 @@
+# Copyright(c) 2020 The WebRTC project authors.All Rights Reserved.
+#
+# Use of this source code is governed by a BSD - style license
+# that can be found in the LICENSE file in the root of the source
+# tree.An additional intellectual property rights grant can be found
+# in the file PATENTS.All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+import("../../webrtc.gni")
+
+rtc_library("voip_core") {
+ sources = [
+ "voip_core.cc",
+ "voip_core.h",
+ ]
+ deps = [
+ ":audio_channel",
+ "..:audio",
+ "../../api:scoped_refptr",
+ "../../api/audio_codecs:audio_codecs_api",
+ "../../api/task_queue",
+ "../../api/voip:voip_api",
+ "../../modules/audio_device:audio_device_api",
+ "../../modules/audio_mixer:audio_mixer_impl",
+ "../../modules/audio_processing:api",
+ "../../rtc_base:criticalsection",
+ "../../rtc_base:logging",
+ "../../rtc_base/synchronization:mutex",
+ ]
+ absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
+}
+
+rtc_library("audio_channel") {
+ sources = [
+ "audio_channel.cc",
+ "audio_channel.h",
+ ]
+ deps = [
+ ":audio_egress",
+ ":audio_ingress",
+ "../../api:transport_api",
+ "../../api/audio_codecs:audio_codecs_api",
+ "../../api/task_queue",
+ "../../api/voip:voip_api",
+ "../../modules/audio_device:audio_device_api",
+ "../../modules/rtp_rtcp",
+ "../../modules/rtp_rtcp:rtp_rtcp_format",
+ "../../rtc_base:criticalsection",
+ "../../rtc_base:logging",
+ "../../rtc_base:refcount",
+ ]
+}
+
+rtc_library("audio_ingress") {
+ sources = [
+ "audio_ingress.cc",
+ "audio_ingress.h",
+ ]
+ deps = [
+ "..:audio",
+ "../../api:array_view",
+ "../../api:rtp_headers",
+ "../../api:scoped_refptr",
+ "../../api:transport_api",
+ "../../api/audio:audio_mixer_api",
+ "../../api/audio_codecs:audio_codecs_api",
+ "../../api/voip:voip_api",
+ "../../modules/audio_coding",
+ "../../modules/rtp_rtcp",
+ "../../modules/rtp_rtcp:rtp_rtcp_format",
+ "../../rtc_base:criticalsection",
+ "../../rtc_base:logging",
+ "../../rtc_base:rtc_numerics",
+ "../../rtc_base:safe_minmax",
+ "../../rtc_base:timeutils",
+ "../../rtc_base/synchronization:mutex",
+ "../utility:audio_frame_operations",
+ ]
+ absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
+}
+
+rtc_library("audio_egress") {
+ sources = [
+ "audio_egress.cc",
+ "audio_egress.h",
+ ]
+ deps = [
+ "..:audio",
+ "../../api:sequence_checker",
+ "../../api/audio_codecs:audio_codecs_api",
+ "../../api/task_queue",
+ "../../call:audio_sender_interface",
+ "../../modules/audio_coding",
+ "../../modules/rtp_rtcp",
+ "../../modules/rtp_rtcp:rtp_rtcp_format",
+ "../../rtc_base:logging",
+ "../../rtc_base:rtc_task_queue",
+ "../../rtc_base:timeutils",
+ "../../rtc_base/synchronization:mutex",
+ "../../rtc_base/system:no_unique_address",
+ "../utility:audio_frame_operations",
+ ]
+}
diff --git a/third_party/libwebrtc/audio/voip/audio_channel.cc b/third_party/libwebrtc/audio/voip/audio_channel.cc
new file mode 100644
index 0000000000..a70e33ec38
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/audio_channel.cc
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/audio_channel.h"
+
+#include <utility>
+#include <vector>
+
+#include "api/audio_codecs/audio_format.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "modules/rtp_rtcp/include/receive_statistics.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_impl2.h"
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+
+namespace {
+
+constexpr int kRtcpReportIntervalMs = 5000;
+
+} // namespace
+
+AudioChannel::AudioChannel(
+ Transport* transport,
+ uint32_t local_ssrc,
+ TaskQueueFactory* task_queue_factory,
+ AudioMixer* audio_mixer,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory)
+ : audio_mixer_(audio_mixer) {
+ RTC_DCHECK(task_queue_factory);
+ RTC_DCHECK(audio_mixer);
+
+ Clock* clock = Clock::GetRealTimeClock();
+ receive_statistics_ = ReceiveStatistics::Create(clock);
+
+ RtpRtcpInterface::Configuration rtp_config;
+ rtp_config.clock = clock;
+ rtp_config.audio = true;
+ rtp_config.receive_statistics = receive_statistics_.get();
+ rtp_config.rtcp_report_interval_ms = kRtcpReportIntervalMs;
+ rtp_config.outgoing_transport = transport;
+ rtp_config.local_media_ssrc = local_ssrc;
+
+ rtp_rtcp_ = ModuleRtpRtcpImpl2::Create(rtp_config);
+
+ rtp_rtcp_->SetSendingMediaStatus(false);
+ rtp_rtcp_->SetRTCPStatus(RtcpMode::kCompound);
+
+ ingress_ = std::make_unique<AudioIngress>(rtp_rtcp_.get(), clock,
+ receive_statistics_.get(),
+ std::move(decoder_factory));
+ egress_ =
+ std::make_unique<AudioEgress>(rtp_rtcp_.get(), clock, task_queue_factory);
+
+ // Set the instance of audio ingress to be part of audio mixer for ADM to
+ // fetch audio samples to play.
+ audio_mixer_->AddSource(ingress_.get());
+}
+
+AudioChannel::~AudioChannel() {
+ if (egress_->IsSending()) {
+ StopSend();
+ }
+ if (ingress_->IsPlaying()) {
+ StopPlay();
+ }
+
+ audio_mixer_->RemoveSource(ingress_.get());
+
+ // TODO(bugs.webrtc.org/11581): unclear if we still need to clear `egress_`
+ // here.
+ egress_.reset();
+ ingress_.reset();
+}
+
+bool AudioChannel::StartSend() {
+ // If encoder has not been set, return false.
+ if (!egress_->StartSend()) {
+ return false;
+ }
+
+ // Start sending with RTP stack if it has not been sending yet.
+ if (!rtp_rtcp_->Sending()) {
+ rtp_rtcp_->SetSendingStatus(true);
+ }
+ return true;
+}
+
+void AudioChannel::StopSend() {
+ egress_->StopSend();
+
+ // Deactivate RTP stack when both sending and receiving are stopped.
+ // SetSendingStatus(false) triggers the transmission of RTCP BYE
+ // message to remote endpoint.
+ if (!ingress_->IsPlaying() && rtp_rtcp_->Sending()) {
+ rtp_rtcp_->SetSendingStatus(false);
+ }
+}
+
+bool AudioChannel::StartPlay() {
+ // If decoders have not been set, return false.
+ if (!ingress_->StartPlay()) {
+ return false;
+ }
+
+ // If RTP stack is not sending then start sending as in recv-only mode, RTCP
+ // receiver report is expected.
+ if (!rtp_rtcp_->Sending()) {
+ rtp_rtcp_->SetSendingStatus(true);
+ }
+ return true;
+}
+
+void AudioChannel::StopPlay() {
+ ingress_->StopPlay();
+
+ // Deactivate RTP stack only when both sending and receiving are stopped.
+ if (!rtp_rtcp_->SendingMedia() && rtp_rtcp_->Sending()) {
+ rtp_rtcp_->SetSendingStatus(false);
+ }
+}
+
+IngressStatistics AudioChannel::GetIngressStatistics() {
+ IngressStatistics ingress_stats;
+ NetworkStatistics stats = ingress_->GetNetworkStatistics();
+ ingress_stats.neteq_stats.total_samples_received = stats.totalSamplesReceived;
+ ingress_stats.neteq_stats.concealed_samples = stats.concealedSamples;
+ ingress_stats.neteq_stats.concealment_events = stats.concealmentEvents;
+ ingress_stats.neteq_stats.jitter_buffer_delay_ms = stats.jitterBufferDelayMs;
+ ingress_stats.neteq_stats.jitter_buffer_emitted_count =
+ stats.jitterBufferEmittedCount;
+ ingress_stats.neteq_stats.jitter_buffer_target_delay_ms =
+ stats.jitterBufferTargetDelayMs;
+ ingress_stats.neteq_stats.inserted_samples_for_deceleration =
+ stats.insertedSamplesForDeceleration;
+ ingress_stats.neteq_stats.removed_samples_for_acceleration =
+ stats.removedSamplesForAcceleration;
+ ingress_stats.neteq_stats.silent_concealed_samples =
+ stats.silentConcealedSamples;
+ ingress_stats.neteq_stats.fec_packets_received = stats.fecPacketsReceived;
+ ingress_stats.neteq_stats.fec_packets_discarded = stats.fecPacketsDiscarded;
+ ingress_stats.neteq_stats.delayed_packet_outage_samples =
+ stats.delayedPacketOutageSamples;
+ ingress_stats.neteq_stats.relative_packet_arrival_delay_ms =
+ stats.relativePacketArrivalDelayMs;
+ ingress_stats.neteq_stats.interruption_count = stats.interruptionCount;
+ ingress_stats.neteq_stats.total_interruption_duration_ms =
+ stats.totalInterruptionDurationMs;
+ ingress_stats.total_duration = ingress_->GetOutputTotalDuration();
+ return ingress_stats;
+}
+
+ChannelStatistics AudioChannel::GetChannelStatistics() {
+ ChannelStatistics channel_stat = ingress_->GetChannelStatistics();
+
+ StreamDataCounters rtp_stats, rtx_stats;
+ rtp_rtcp_->GetSendStreamDataCounters(&rtp_stats, &rtx_stats);
+ channel_stat.bytes_sent =
+ rtp_stats.transmitted.payload_bytes + rtx_stats.transmitted.payload_bytes;
+ channel_stat.packets_sent =
+ rtp_stats.transmitted.packets + rtx_stats.transmitted.packets;
+
+ return channel_stat;
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/audio_channel.h b/third_party/libwebrtc/audio/voip/audio_channel.h
new file mode 100644
index 0000000000..7338d9faab
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/audio_channel.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_VOIP_AUDIO_CHANNEL_H_
+#define AUDIO_VOIP_AUDIO_CHANNEL_H_
+
+#include <map>
+#include <memory>
+#include <queue>
+#include <utility>
+
+#include "api/task_queue/task_queue_factory.h"
+#include "api/voip/voip_base.h"
+#include "api/voip/voip_statistics.h"
+#include "audio/voip/audio_egress.h"
+#include "audio/voip/audio_ingress.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_impl2.h"
+#include "rtc_base/ref_count.h"
+
+namespace webrtc {
+
+// AudioChannel represents a single media session and provides APIs over
+// AudioIngress and AudioEgress. Note that a single RTP stack is shared with
+// these two classes as it has both sending and receiving capabilities.
+class AudioChannel : public rtc::RefCountInterface {
+ public:
+ AudioChannel(Transport* transport,
+ uint32_t local_ssrc,
+ TaskQueueFactory* task_queue_factory,
+ AudioMixer* audio_mixer,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory);
+ ~AudioChannel() override;
+
+ // Set and get ChannelId that this audio channel belongs for debugging and
+ // logging purpose.
+ void SetId(ChannelId id) { id_ = id; }
+ ChannelId GetId() const { return id_; }
+
+ // APIs to start/stop audio channel on each direction.
+ // StartSend/StartPlay returns false if encoder/decoders
+ // have not been set, respectively.
+ bool StartSend();
+ void StopSend();
+ bool StartPlay();
+ void StopPlay();
+
+ // APIs relayed to AudioEgress.
+ bool IsSendingMedia() const { return egress_->IsSending(); }
+ AudioSender* GetAudioSender() { return egress_.get(); }
+ void SetEncoder(int payload_type,
+ const SdpAudioFormat& encoder_format,
+ std::unique_ptr<AudioEncoder> encoder) {
+ egress_->SetEncoder(payload_type, encoder_format, std::move(encoder));
+ }
+ absl::optional<SdpAudioFormat> GetEncoderFormat() const {
+ return egress_->GetEncoderFormat();
+ }
+ void RegisterTelephoneEventType(int rtp_payload_type, int sample_rate_hz) {
+ egress_->RegisterTelephoneEventType(rtp_payload_type, sample_rate_hz);
+ }
+ bool SendTelephoneEvent(int dtmf_event, int duration_ms) {
+ return egress_->SendTelephoneEvent(dtmf_event, duration_ms);
+ }
+ void SetMute(bool enable) { egress_->SetMute(enable); }
+
+ // APIs relayed to AudioIngress.
+ bool IsPlaying() const { return ingress_->IsPlaying(); }
+ void ReceivedRTPPacket(rtc::ArrayView<const uint8_t> rtp_packet) {
+ ingress_->ReceivedRTPPacket(rtp_packet);
+ }
+ void ReceivedRTCPPacket(rtc::ArrayView<const uint8_t> rtcp_packet) {
+ ingress_->ReceivedRTCPPacket(rtcp_packet);
+ }
+ void SetReceiveCodecs(const std::map<int, SdpAudioFormat>& codecs) {
+ ingress_->SetReceiveCodecs(codecs);
+ }
+ IngressStatistics GetIngressStatistics();
+ ChannelStatistics GetChannelStatistics();
+
+ // See comments on the methods used from AudioEgress and AudioIngress.
+ // Conversion to double is following what is done in
+ // DoubleAudioLevelFromIntAudioLevel method in rtc_stats_collector.cc to be
+ // consistent.
+ double GetInputAudioLevel() const {
+ return egress_->GetInputAudioLevel() / 32767.0;
+ }
+ double GetInputTotalEnergy() const { return egress_->GetInputTotalEnergy(); }
+ double GetInputTotalDuration() const {
+ return egress_->GetInputTotalDuration();
+ }
+ double GetOutputAudioLevel() const {
+ return ingress_->GetOutputAudioLevel() / 32767.0;
+ }
+ double GetOutputTotalEnergy() const {
+ return ingress_->GetOutputTotalEnergy();
+ }
+ double GetOutputTotalDuration() const {
+ return ingress_->GetOutputTotalDuration();
+ }
+
+ // Internal API for testing purpose.
+ void SendRTCPReportForTesting(RTCPPacketType type) {
+ int32_t result = rtp_rtcp_->SendRTCP(type);
+ RTC_DCHECK(result == 0);
+ }
+
+ private:
+ // ChannelId that this audio channel belongs for logging purpose.
+ ChannelId id_;
+
+ // Synchronization is handled internally by AudioMixer.
+ AudioMixer* audio_mixer_;
+
+ // Listed in order for safe destruction of AudioChannel object.
+ // Synchronization for these are handled internally.
+ std::unique_ptr<ReceiveStatistics> receive_statistics_;
+ std::unique_ptr<ModuleRtpRtcpImpl2> rtp_rtcp_;
+ std::unique_ptr<AudioIngress> ingress_;
+ std::unique_ptr<AudioEgress> egress_;
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_VOIP_AUDIO_CHANNEL_H_
diff --git a/third_party/libwebrtc/audio/voip/audio_egress.cc b/third_party/libwebrtc/audio/voip/audio_egress.cc
new file mode 100644
index 0000000000..1162824c9e
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/audio_egress.cc
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/audio_egress.h"
+
+#include <utility>
+#include <vector>
+
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+
+AudioEgress::AudioEgress(RtpRtcpInterface* rtp_rtcp,
+ Clock* clock,
+ TaskQueueFactory* task_queue_factory)
+ : rtp_rtcp_(rtp_rtcp),
+ rtp_sender_audio_(clock, rtp_rtcp_->RtpSender()),
+ audio_coding_(AudioCodingModule::Create(AudioCodingModule::Config())),
+ encoder_queue_(task_queue_factory->CreateTaskQueue(
+ "AudioEncoder",
+ TaskQueueFactory::Priority::NORMAL)) {
+ audio_coding_->RegisterTransportCallback(this);
+}
+
+AudioEgress::~AudioEgress() {
+ audio_coding_->RegisterTransportCallback(nullptr);
+}
+
+bool AudioEgress::IsSending() const {
+ return rtp_rtcp_->SendingMedia();
+}
+
+void AudioEgress::SetEncoder(int payload_type,
+ const SdpAudioFormat& encoder_format,
+ std::unique_ptr<AudioEncoder> encoder) {
+ RTC_DCHECK_GE(payload_type, 0);
+ RTC_DCHECK_LE(payload_type, 127);
+
+ SetEncoderFormat(encoder_format);
+
+ // The RTP/RTCP module needs to know the RTP timestamp rate (i.e. clockrate)
+ // as well as some other things, so we collect this info and send it along.
+ rtp_rtcp_->RegisterSendPayloadFrequency(payload_type,
+ encoder->RtpTimestampRateHz());
+ rtp_sender_audio_.RegisterAudioPayload("audio", payload_type,
+ encoder->RtpTimestampRateHz(),
+ encoder->NumChannels(), 0);
+
+ audio_coding_->SetEncoder(std::move(encoder));
+}
+
+bool AudioEgress::StartSend() {
+ if (!GetEncoderFormat()) {
+ RTC_DLOG(LS_WARNING) << "Send codec has not been set yet";
+ return false;
+ }
+ rtp_rtcp_->SetSendingMediaStatus(true);
+ return true;
+}
+
+void AudioEgress::StopSend() {
+ rtp_rtcp_->SetSendingMediaStatus(false);
+}
+
+void AudioEgress::SendAudioData(std::unique_ptr<AudioFrame> audio_frame) {
+ RTC_DCHECK_GT(audio_frame->samples_per_channel_, 0);
+ RTC_DCHECK_LE(audio_frame->num_channels_, 8);
+
+ encoder_queue_.PostTask(
+ [this, audio_frame = std::move(audio_frame)]() mutable {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ if (!rtp_rtcp_->SendingMedia()) {
+ return;
+ }
+
+ double duration_seconds =
+ static_cast<double>(audio_frame->samples_per_channel_) /
+ audio_frame->sample_rate_hz_;
+
+ input_audio_level_.ComputeLevel(*audio_frame, duration_seconds);
+
+ AudioFrameOperations::Mute(audio_frame.get(),
+ encoder_context_.previously_muted_,
+ encoder_context_.mute_);
+ encoder_context_.previously_muted_ = encoder_context_.mute_;
+
+ audio_frame->timestamp_ = encoder_context_.frame_rtp_timestamp_;
+
+ // This call will trigger AudioPacketizationCallback::SendData if
+ // encoding is done and payload is ready for packetization and
+ // transmission. Otherwise, it will return without invoking the
+ // callback.
+ if (audio_coding_->Add10MsData(*audio_frame) < 0) {
+ RTC_DLOG(LS_ERROR) << "ACM::Add10MsData() failed.";
+ return;
+ }
+
+ encoder_context_.frame_rtp_timestamp_ +=
+ rtc::dchecked_cast<uint32_t>(audio_frame->samples_per_channel_);
+ });
+}
+
+int32_t AudioEgress::SendData(AudioFrameType frame_type,
+ uint8_t payload_type,
+ uint32_t timestamp,
+ const uint8_t* payload_data,
+ size_t payload_size) {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+
+ rtc::ArrayView<const uint8_t> payload(payload_data, payload_size);
+
+ // Currently we don't get a capture time from downstream modules (ADM,
+ // AudioTransportImpl).
+ // TODO(natim@webrtc.org): Integrate once it's ready.
+ constexpr uint32_t kUndefinedCaptureTime = -1;
+
+ // Push data from ACM to RTP/RTCP-module to deliver audio frame for
+ // packetization.
+ if (!rtp_rtcp_->OnSendingRtpFrame(timestamp, kUndefinedCaptureTime,
+ payload_type,
+ /*force_sender_report=*/false)) {
+ return -1;
+ }
+
+ const uint32_t rtp_timestamp = timestamp + rtp_rtcp_->StartTimestamp();
+
+ // This call will trigger Transport::SendPacket() from the RTP/RTCP module.
+ if (!rtp_sender_audio_.SendAudio(frame_type, payload_type, rtp_timestamp,
+ payload.data(), payload.size())) {
+ RTC_DLOG(LS_ERROR)
+ << "AudioEgress::SendData() failed to send data to RTP/RTCP module";
+ return -1;
+ }
+
+ return 0;
+}
+
+void AudioEgress::RegisterTelephoneEventType(int rtp_payload_type,
+ int sample_rate_hz) {
+ RTC_DCHECK_GE(rtp_payload_type, 0);
+ RTC_DCHECK_LE(rtp_payload_type, 127);
+
+ rtp_rtcp_->RegisterSendPayloadFrequency(rtp_payload_type, sample_rate_hz);
+ rtp_sender_audio_.RegisterAudioPayload("telephone-event", rtp_payload_type,
+ sample_rate_hz, 0, 0);
+}
+
+bool AudioEgress::SendTelephoneEvent(int dtmf_event, int duration_ms) {
+ RTC_DCHECK_GE(dtmf_event, 0);
+ RTC_DCHECK_LE(dtmf_event, 255);
+ RTC_DCHECK_GE(duration_ms, 0);
+ RTC_DCHECK_LE(duration_ms, 65535);
+
+ if (!IsSending()) {
+ return false;
+ }
+
+ constexpr int kTelephoneEventAttenuationdB = 10;
+
+ if (rtp_sender_audio_.SendTelephoneEvent(dtmf_event, duration_ms,
+ kTelephoneEventAttenuationdB) != 0) {
+ RTC_DLOG(LS_ERROR) << "SendTelephoneEvent() failed to send event";
+ return false;
+ }
+ return true;
+}
+
+void AudioEgress::SetMute(bool mute) {
+ encoder_queue_.PostTask([this, mute] {
+ RTC_DCHECK_RUN_ON(&encoder_queue_);
+ encoder_context_.mute_ = mute;
+ });
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/audio_egress.h b/third_party/libwebrtc/audio/voip/audio_egress.h
new file mode 100644
index 0000000000..989e5bda59
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/audio_egress.h
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_VOIP_AUDIO_EGRESS_H_
+#define AUDIO_VOIP_AUDIO_EGRESS_H_
+
+#include <memory>
+#include <string>
+
+#include "api/audio_codecs/audio_format.h"
+#include "api/sequence_checker.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "audio/audio_level.h"
+#include "audio/utility/audio_frame_operations.h"
+#include "call/audio_sender.h"
+#include "modules/audio_coding/include/audio_coding_module.h"
+#include "modules/rtp_rtcp/include/report_block_data.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_interface.h"
+#include "modules/rtp_rtcp/source/rtp_sender_audio.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "rtc_base/task_queue.h"
+#include "rtc_base/time_utils.h"
+
+namespace webrtc {
+
+// AudioEgress receives input samples from AudioDeviceModule via
+// AudioTransportImpl through AudioSender interface. Once it encodes the sample
+// via selected encoder through AudioPacketizationCallback interface, the
+// encoded payload will be packetized by the RTP stack, resulting in ready to
+// send RTP packet to remote endpoint.
+//
+// TaskQueue is used to encode and send RTP asynchrounously as some OS platform
+// uses the same thread for both audio input and output sample deliveries which
+// can affect audio quality.
+//
+// Note that this class is originally based on ChannelSend in
+// audio/channel_send.cc with non-audio related logic trimmed as aimed for
+// smaller footprint.
+class AudioEgress : public AudioSender, public AudioPacketizationCallback {
+ public:
+ AudioEgress(RtpRtcpInterface* rtp_rtcp,
+ Clock* clock,
+ TaskQueueFactory* task_queue_factory);
+ ~AudioEgress() override;
+
+ // Set the encoder format and payload type for AudioCodingModule.
+ // It's possible to change the encoder type during its active usage.
+ // `payload_type` must be the type that is negotiated with peer through
+ // offer/answer.
+ void SetEncoder(int payload_type,
+ const SdpAudioFormat& encoder_format,
+ std::unique_ptr<AudioEncoder> encoder);
+
+ // Start or stop sending operation of AudioEgress. This will start/stop
+ // the RTP stack also causes encoder queue thread to start/stop
+ // processing input audio samples. StartSend will return false if
+ // a send codec has not been set.
+ bool StartSend();
+ void StopSend();
+
+ // Query the state of the RTP stack. This returns true if StartSend()
+ // called and false if StopSend() is called.
+ bool IsSending() const;
+
+ // Enable or disable Mute state.
+ void SetMute(bool mute);
+
+ // Retrieve current encoder format info. This returns encoder format set
+ // by SetEncoder() and if encoder is not set, this will return nullopt.
+ absl::optional<SdpAudioFormat> GetEncoderFormat() const {
+ MutexLock lock(&lock_);
+ return encoder_format_;
+ }
+
+ // Register the payload type and sample rate for DTMF (RFC 4733) payload.
+ void RegisterTelephoneEventType(int rtp_payload_type, int sample_rate_hz);
+
+ // Send DTMF named event as specified by
+ // https://tools.ietf.org/html/rfc4733#section-3.2
+ // `duration_ms` specifies the duration of DTMF packets that will be emitted
+ // in place of real RTP packets instead.
+ // This will return true when requested dtmf event is successfully scheduled
+ // otherwise false when the dtmf queue reached maximum of 20 events.
+ bool SendTelephoneEvent(int dtmf_event, int duration_ms);
+
+ // See comments on LevelFullRange, TotalEnergy, TotalDuration from
+ // audio/audio_level.h.
+ int GetInputAudioLevel() const { return input_audio_level_.LevelFullRange(); }
+ double GetInputTotalEnergy() const {
+ return input_audio_level_.TotalEnergy();
+ }
+ double GetInputTotalDuration() const {
+ return input_audio_level_.TotalDuration();
+ }
+
+ // Implementation of AudioSender interface.
+ void SendAudioData(std::unique_ptr<AudioFrame> audio_frame) override;
+
+ // Implementation of AudioPacketizationCallback interface.
+ int32_t SendData(AudioFrameType frame_type,
+ uint8_t payload_type,
+ uint32_t timestamp,
+ const uint8_t* payload_data,
+ size_t payload_size) override;
+
+ private:
+ void SetEncoderFormat(const SdpAudioFormat& encoder_format) {
+ MutexLock lock(&lock_);
+ encoder_format_ = encoder_format;
+ }
+
+ mutable Mutex lock_;
+
+ // Current encoder format selected by caller.
+ absl::optional<SdpAudioFormat> encoder_format_ RTC_GUARDED_BY(lock_);
+
+ // Synchronization is handled internally by RtpRtcp.
+ RtpRtcpInterface* const rtp_rtcp_;
+
+ // Synchronization is handled internally by RTPSenderAudio.
+ RTPSenderAudio rtp_sender_audio_;
+
+ // Synchronization is handled internally by AudioCodingModule.
+ const std::unique_ptr<AudioCodingModule> audio_coding_;
+
+ // Synchronization is handled internally by voe::AudioLevel.
+ voe::AudioLevel input_audio_level_;
+
+ // Struct that holds all variables used by encoder task queue.
+ struct EncoderContext {
+ // Offset used to mark rtp timestamp in sample rate unit in
+ // newly received audio frame from AudioTransport.
+ uint32_t frame_rtp_timestamp_ = 0;
+
+ // Flag to track mute state from caller. `previously_muted_` is used to
+ // track previous state as part of input to AudioFrameOperations::Mute
+ // to implement fading effect when (un)mute is invoked.
+ bool mute_ = false;
+ bool previously_muted_ = false;
+ };
+
+ EncoderContext encoder_context_ RTC_GUARDED_BY(encoder_queue_);
+
+ // Defined last to ensure that there are no running tasks when the other
+ // members are destroyed.
+ rtc::TaskQueue encoder_queue_;
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_VOIP_AUDIO_EGRESS_H_
diff --git a/third_party/libwebrtc/audio/voip/audio_ingress.cc b/third_party/libwebrtc/audio/voip/audio_ingress.cc
new file mode 100644
index 0000000000..9492a51a21
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/audio_ingress.cc
@@ -0,0 +1,296 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/audio_ingress.h"
+
+#include <algorithm>
+#include <utility>
+#include <vector>
+
+#include "api/audio_codecs/audio_format.h"
+#include "audio/utility/audio_frame_operations.h"
+#include "modules/audio_coding/include/audio_coding_module.h"
+#include "modules/rtp_rtcp/source/byte_io.h"
+#include "modules/rtp_rtcp/source/rtcp_packet/common_header.h"
+#include "modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
+#include "modules/rtp_rtcp/source/rtcp_packet/sender_report.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/numerics/safe_minmax.h"
+#include "rtc_base/time_utils.h"
+
+namespace webrtc {
+
+namespace {
+
+AudioCodingModule::Config CreateAcmConfig(
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory) {
+ AudioCodingModule::Config acm_config;
+ acm_config.neteq_config.enable_muted_state = true;
+ acm_config.decoder_factory = decoder_factory;
+ return acm_config;
+}
+
+} // namespace
+
+AudioIngress::AudioIngress(
+ RtpRtcpInterface* rtp_rtcp,
+ Clock* clock,
+ ReceiveStatistics* receive_statistics,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory)
+ : playing_(false),
+ remote_ssrc_(0),
+ first_rtp_timestamp_(-1),
+ rtp_receive_statistics_(receive_statistics),
+ rtp_rtcp_(rtp_rtcp),
+ acm_receiver_(CreateAcmConfig(decoder_factory)),
+ ntp_estimator_(clock) {}
+
+AudioIngress::~AudioIngress() = default;
+
+AudioMixer::Source::AudioFrameInfo AudioIngress::GetAudioFrameWithInfo(
+ int sampling_rate,
+ AudioFrame* audio_frame) {
+ audio_frame->sample_rate_hz_ = sampling_rate;
+
+ // Get 10ms raw PCM data from the ACM.
+ bool muted = false;
+ if (acm_receiver_.GetAudio(sampling_rate, audio_frame, &muted) == -1) {
+ RTC_DLOG(LS_ERROR) << "GetAudio() failed!";
+ // In all likelihood, the audio in this frame is garbage. We return an
+ // error so that the audio mixer module doesn't add it to the mix. As
+ // a result, it won't be played out and the actions skipped here are
+ // irrelevant.
+ return AudioMixer::Source::AudioFrameInfo::kError;
+ }
+
+ if (muted) {
+ AudioFrameOperations::Mute(audio_frame);
+ }
+
+ // Measure audio level.
+ constexpr double kAudioSampleDurationSeconds = 0.01;
+ output_audio_level_.ComputeLevel(*audio_frame, kAudioSampleDurationSeconds);
+
+ // If caller invoked StopPlay(), then mute the frame.
+ if (!playing_) {
+ AudioFrameOperations::Mute(audio_frame);
+ muted = true;
+ }
+
+ // Set first rtp timestamp with first audio frame with valid timestamp.
+ if (first_rtp_timestamp_ < 0 && audio_frame->timestamp_ != 0) {
+ first_rtp_timestamp_ = audio_frame->timestamp_;
+ }
+
+ if (first_rtp_timestamp_ >= 0) {
+ // Compute elapsed and NTP times.
+ int64_t unwrap_timestamp;
+ {
+ MutexLock lock(&lock_);
+ unwrap_timestamp =
+ timestamp_wrap_handler_.Unwrap(audio_frame->timestamp_);
+ audio_frame->ntp_time_ms_ =
+ ntp_estimator_.Estimate(audio_frame->timestamp_);
+ }
+ // For clock rate, default to the playout sampling rate if we haven't
+ // received any packets yet.
+ absl::optional<std::pair<int, SdpAudioFormat>> decoder =
+ acm_receiver_.LastDecoder();
+ int clock_rate = decoder ? decoder->second.clockrate_hz
+ : acm_receiver_.last_output_sample_rate_hz();
+ RTC_DCHECK_GT(clock_rate, 0);
+ audio_frame->elapsed_time_ms_ =
+ (unwrap_timestamp - first_rtp_timestamp_) / (clock_rate / 1000);
+ }
+
+ return muted ? AudioMixer::Source::AudioFrameInfo::kMuted
+ : AudioMixer::Source::AudioFrameInfo::kNormal;
+}
+
+bool AudioIngress::StartPlay() {
+ {
+ MutexLock lock(&lock_);
+ if (receive_codec_info_.empty()) {
+ RTC_DLOG(LS_WARNING) << "Receive codecs have not been set yet";
+ return false;
+ }
+ }
+ playing_ = true;
+ return true;
+}
+
+void AudioIngress::SetReceiveCodecs(
+ const std::map<int, SdpAudioFormat>& codecs) {
+ {
+ MutexLock lock(&lock_);
+ for (const auto& kv : codecs) {
+ receive_codec_info_[kv.first] = kv.second.clockrate_hz;
+ }
+ }
+ acm_receiver_.SetCodecs(codecs);
+}
+
+void AudioIngress::ReceivedRTPPacket(rtc::ArrayView<const uint8_t> rtp_packet) {
+ RtpPacketReceived rtp_packet_received;
+ rtp_packet_received.Parse(rtp_packet.data(), rtp_packet.size());
+
+ // Set payload type's sampling rate before we feed it into ReceiveStatistics.
+ {
+ MutexLock lock(&lock_);
+ const auto& it =
+ receive_codec_info_.find(rtp_packet_received.PayloadType());
+ // If sampling rate info is not available in our received codec set, it
+ // would mean that remote media endpoint is sending incorrect payload id
+ // which can't be processed correctly especially on payload type id in
+ // dynamic range.
+ if (it == receive_codec_info_.end()) {
+ RTC_DLOG(LS_WARNING) << "Unexpected payload id received: "
+ << rtp_packet_received.PayloadType();
+ return;
+ }
+ rtp_packet_received.set_payload_type_frequency(it->second);
+ }
+
+ // Track current remote SSRC.
+ if (rtp_packet_received.Ssrc() != remote_ssrc_) {
+ rtp_rtcp_->SetRemoteSSRC(rtp_packet_received.Ssrc());
+ remote_ssrc_.store(rtp_packet_received.Ssrc());
+ }
+
+ rtp_receive_statistics_->OnRtpPacket(rtp_packet_received);
+
+ RTPHeader header;
+ rtp_packet_received.GetHeader(&header);
+
+ size_t packet_length = rtp_packet_received.size();
+ if (packet_length < header.headerLength ||
+ (packet_length - header.headerLength) < header.paddingLength) {
+ RTC_DLOG(LS_ERROR) << "Packet length(" << packet_length << ") header("
+ << header.headerLength << ") padding("
+ << header.paddingLength << ")";
+ return;
+ }
+
+ const uint8_t* payload = rtp_packet_received.data() + header.headerLength;
+ size_t payload_length = packet_length - header.headerLength;
+ size_t payload_data_length = payload_length - header.paddingLength;
+ auto data_view = rtc::ArrayView<const uint8_t>(payload, payload_data_length);
+
+ // Push the incoming payload (parsed and ready for decoding) into the ACM.
+ if (acm_receiver_.InsertPacket(header, data_view) != 0) {
+ RTC_DLOG(LS_ERROR) << "AudioIngress::ReceivedRTPPacket() unable to "
+ "push data to the ACM";
+ }
+}
+
+void AudioIngress::ReceivedRTCPPacket(
+ rtc::ArrayView<const uint8_t> rtcp_packet) {
+ rtcp::CommonHeader rtcp_header;
+ if (rtcp_header.Parse(rtcp_packet.data(), rtcp_packet.size()) &&
+ (rtcp_header.type() == rtcp::SenderReport::kPacketType ||
+ rtcp_header.type() == rtcp::ReceiverReport::kPacketType)) {
+ RTC_DCHECK_GE(rtcp_packet.size(), 8);
+
+ uint32_t sender_ssrc =
+ ByteReader<uint32_t>::ReadBigEndian(rtcp_packet.data() + 4);
+
+ // If we don't have remote ssrc at this point, it's likely that remote
+ // endpoint is receive-only or it could have restarted the media.
+ if (sender_ssrc != remote_ssrc_) {
+ rtp_rtcp_->SetRemoteSSRC(sender_ssrc);
+ remote_ssrc_.store(sender_ssrc);
+ }
+ }
+
+ // Deliver RTCP packet to RTP/RTCP module for parsing and processing.
+ rtp_rtcp_->IncomingRtcpPacket(rtcp_packet.data(), rtcp_packet.size());
+
+ int64_t rtt = 0;
+ if (rtp_rtcp_->RTT(remote_ssrc_, &rtt, nullptr, nullptr, nullptr) != 0) {
+ // Waiting for valid RTT.
+ return;
+ }
+
+ uint32_t ntp_secs = 0, ntp_frac = 0, rtp_timestamp = 0;
+ if (rtp_rtcp_->RemoteNTP(&ntp_secs, &ntp_frac, nullptr, nullptr,
+ &rtp_timestamp) != 0) {
+ // Waiting for RTCP.
+ return;
+ }
+
+ {
+ MutexLock lock(&lock_);
+ ntp_estimator_.UpdateRtcpTimestamp(
+ TimeDelta::Millis(rtt), NtpTime(ntp_secs, ntp_frac), rtp_timestamp);
+ }
+}
+
+ChannelStatistics AudioIngress::GetChannelStatistics() {
+ ChannelStatistics channel_stats;
+
+ // Get clockrate for current decoder ahead of jitter calculation.
+ uint32_t clockrate_hz = 0;
+ absl::optional<std::pair<int, SdpAudioFormat>> decoder =
+ acm_receiver_.LastDecoder();
+ if (decoder) {
+ clockrate_hz = decoder->second.clockrate_hz;
+ }
+
+ StreamStatistician* statistician =
+ rtp_receive_statistics_->GetStatistician(remote_ssrc_);
+ if (statistician) {
+ RtpReceiveStats stats = statistician->GetStats();
+ channel_stats.packets_lost = stats.packets_lost;
+ channel_stats.packets_received = stats.packet_counter.packets;
+ channel_stats.bytes_received = stats.packet_counter.payload_bytes;
+ channel_stats.remote_ssrc = remote_ssrc_;
+ if (clockrate_hz > 0) {
+ channel_stats.jitter = static_cast<double>(stats.jitter) / clockrate_hz;
+ }
+ }
+
+ // Get RTCP report using remote SSRC.
+ const std::vector<ReportBlockData>& report_data =
+ rtp_rtcp_->GetLatestReportBlockData();
+ for (const ReportBlockData& block_data : report_data) {
+ const RTCPReportBlock& rtcp_report = block_data.report_block();
+ if (rtp_rtcp_->SSRC() != rtcp_report.source_ssrc ||
+ remote_ssrc_ != rtcp_report.sender_ssrc) {
+ continue;
+ }
+ RemoteRtcpStatistics remote_stat;
+ remote_stat.packets_lost = rtcp_report.packets_lost;
+ remote_stat.fraction_lost =
+ static_cast<double>(rtcp_report.fraction_lost) / (1 << 8);
+ if (clockrate_hz > 0) {
+ remote_stat.jitter =
+ static_cast<double>(rtcp_report.jitter) / clockrate_hz;
+ }
+ if (block_data.has_rtt()) {
+ remote_stat.round_trip_time =
+ static_cast<double>(block_data.last_rtt_ms()) /
+ rtc::kNumMillisecsPerSec;
+ }
+ remote_stat.last_report_received_timestamp_ms =
+ block_data.report_block_timestamp_utc_us() /
+ rtc::kNumMicrosecsPerMillisec;
+ channel_stats.remote_rtcp = remote_stat;
+
+ // Receive only channel won't send any RTP packets.
+ if (!channel_stats.remote_ssrc.has_value()) {
+ channel_stats.remote_ssrc = remote_ssrc_;
+ }
+ break;
+ }
+
+ return channel_stats;
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/audio_ingress.h b/third_party/libwebrtc/audio/voip/audio_ingress.h
new file mode 100644
index 0000000000..11bde7ce28
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/audio_ingress.h
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_VOIP_AUDIO_INGRESS_H_
+#define AUDIO_VOIP_AUDIO_INGRESS_H_
+
+#include <algorithm>
+#include <atomic>
+#include <map>
+#include <memory>
+#include <utility>
+
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "api/audio/audio_mixer.h"
+#include "api/rtp_headers.h"
+#include "api/scoped_refptr.h"
+#include "api/voip/voip_statistics.h"
+#include "audio/audio_level.h"
+#include "modules/audio_coding/acm2/acm_receiver.h"
+#include "modules/audio_coding/include/audio_coding_module.h"
+#include "modules/rtp_rtcp/include/receive_statistics.h"
+#include "modules/rtp_rtcp/include/remote_ntp_time_estimator.h"
+#include "modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_interface.h"
+#include "rtc_base/numerics/sequence_number_unwrapper.h"
+#include "rtc_base/synchronization/mutex.h"
+
+namespace webrtc {
+
+// AudioIngress handles incoming RTP/RTCP packets from the remote
+// media endpoint. Received RTP packets are injected into AcmReceiver and
+// when audio output thread requests for audio samples to play through system
+// output such as speaker device, AudioIngress provides the samples via its
+// implementation on AudioMixer::Source interface.
+//
+// Note that this class is originally based on ChannelReceive in
+// audio/channel_receive.cc with non-audio related logic trimmed as aimed for
+// smaller footprint.
+class AudioIngress : public AudioMixer::Source {
+ public:
+ AudioIngress(RtpRtcpInterface* rtp_rtcp,
+ Clock* clock,
+ ReceiveStatistics* receive_statistics,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory);
+ ~AudioIngress() override;
+
+ // Start or stop receiving operation of AudioIngress.
+ bool StartPlay();
+ void StopPlay() {
+ playing_ = false;
+ output_audio_level_.ResetLevelFullRange();
+ }
+
+ // Query the state of the AudioIngress.
+ bool IsPlaying() const { return playing_; }
+
+ // Set the decoder formats and payload type for AcmReceiver where the
+ // key type (int) of the map is the payload type of SdpAudioFormat.
+ void SetReceiveCodecs(const std::map<int, SdpAudioFormat>& codecs);
+
+ // APIs to handle received RTP/RTCP packets from caller.
+ void ReceivedRTPPacket(rtc::ArrayView<const uint8_t> rtp_packet);
+ void ReceivedRTCPPacket(rtc::ArrayView<const uint8_t> rtcp_packet);
+
+ // See comments on LevelFullRange, TotalEnergy, TotalDuration from
+ // audio/audio_level.h.
+ int GetOutputAudioLevel() const {
+ return output_audio_level_.LevelFullRange();
+ }
+ double GetOutputTotalEnergy() { return output_audio_level_.TotalEnergy(); }
+ double GetOutputTotalDuration() {
+ return output_audio_level_.TotalDuration();
+ }
+
+ NetworkStatistics GetNetworkStatistics() const {
+ NetworkStatistics stats;
+ acm_receiver_.GetNetworkStatistics(&stats,
+ /*get_and_clear_legacy_stats=*/false);
+ return stats;
+ }
+
+ ChannelStatistics GetChannelStatistics();
+
+ // Implementation of AudioMixer::Source interface.
+ AudioMixer::Source::AudioFrameInfo GetAudioFrameWithInfo(
+ int sampling_rate,
+ AudioFrame* audio_frame) override;
+ int Ssrc() const override {
+ return rtc::dchecked_cast<int>(remote_ssrc_.load());
+ }
+ int PreferredSampleRate() const override {
+ // If we haven't received any RTP packet from remote and thus
+ // last_packet_sampling_rate is not available then use NetEq's sampling
+ // rate as that would be what would be used for audio output sample.
+ return std::max(acm_receiver_.last_packet_sample_rate_hz().value_or(0),
+ acm_receiver_.last_output_sample_rate_hz());
+ }
+
+ private:
+ // Indicates AudioIngress status as caller invokes Start/StopPlaying.
+ // If not playing, incoming RTP data processing is skipped, thus
+ // producing no data to output device.
+ std::atomic<bool> playing_;
+
+ // Currently active remote ssrc from remote media endpoint.
+ std::atomic<uint32_t> remote_ssrc_;
+
+ // The first rtp timestamp of the output audio frame that is used to
+ // calculate elasped time for subsequent audio frames.
+ std::atomic<int64_t> first_rtp_timestamp_;
+
+ // Synchronizaton is handled internally by ReceiveStatistics.
+ ReceiveStatistics* const rtp_receive_statistics_;
+
+ // Synchronizaton is handled internally by RtpRtcpInterface.
+ RtpRtcpInterface* const rtp_rtcp_;
+
+ // Synchronizaton is handled internally by acm2::AcmReceiver.
+ acm2::AcmReceiver acm_receiver_;
+
+ // Synchronizaton is handled internally by voe::AudioLevel.
+ voe::AudioLevel output_audio_level_;
+
+ Mutex lock_;
+
+ RemoteNtpTimeEstimator ntp_estimator_ RTC_GUARDED_BY(lock_);
+
+ // For receiving RTP statistics, this tracks the sampling rate value
+ // per payload type set when caller set via SetReceiveCodecs.
+ std::map<int, int> receive_codec_info_ RTC_GUARDED_BY(lock_);
+
+ RtpTimestampUnwrapper timestamp_wrap_handler_ RTC_GUARDED_BY(lock_);
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_VOIP_AUDIO_INGRESS_H_
diff --git a/third_party/libwebrtc/audio/voip/test/BUILD.gn b/third_party/libwebrtc/audio/voip/test/BUILD.gn
new file mode 100644
index 0000000000..e89f2b001a
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/test/BUILD.gn
@@ -0,0 +1,101 @@
+# Copyright(c) 2020 The WebRTC project authors.All Rights Reserved.
+#
+# Use of this source code is governed by a BSD - style license
+# that can be found in the LICENSE file in the root of the source
+# tree.An additional intellectual property rights grant can be found
+# in the file PATENTS.All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+import("../../../webrtc.gni")
+
+if (rtc_include_tests) {
+ rtc_source_set("mock_task_queue") {
+ testonly = true
+ visibility = [ "*" ]
+ sources = [ "mock_task_queue.h" ]
+ deps = [
+ "../../../api/task_queue:task_queue",
+ "../../../api/task_queue/test:mock_task_queue_base",
+ "../../../test:test_support",
+ ]
+ }
+
+ if (!build_with_chromium) {
+ rtc_library("voip_core_unittests") {
+ testonly = true
+ sources = [ "voip_core_unittest.cc" ]
+ deps = [
+ "..:voip_core",
+ "../../../api/audio_codecs:builtin_audio_decoder_factory",
+ "../../../api/audio_codecs:builtin_audio_encoder_factory",
+ "../../../api/task_queue:default_task_queue_factory",
+ "../../../modules/audio_device:mock_audio_device",
+ "../../../modules/audio_processing:mocks",
+ "../../../test:audio_codec_mocks",
+ "../../../test:mock_transport",
+ "../../../test:run_loop",
+ "../../../test:test_support",
+ ]
+ }
+ }
+
+ rtc_library("audio_channel_unittests") {
+ testonly = true
+ sources = [ "audio_channel_unittest.cc" ]
+ deps = [
+ ":mock_task_queue",
+ "..:audio_channel",
+ "../../../api:transport_api",
+ "../../../api/audio_codecs:builtin_audio_decoder_factory",
+ "../../../api/audio_codecs:builtin_audio_encoder_factory",
+ "../../../api/task_queue:task_queue",
+ "../../../modules/audio_mixer:audio_mixer_impl",
+ "../../../modules/audio_mixer:audio_mixer_test_utils",
+ "../../../modules/rtp_rtcp:rtp_rtcp",
+ "../../../modules/rtp_rtcp:rtp_rtcp_format",
+ "../../../rtc_base:logging",
+ "../../../test:mock_transport",
+ "../../../test:test_support",
+ ]
+ absl_deps = [ "//third_party/abseil-cpp/absl/functional:any_invocable" ]
+ }
+
+ rtc_library("audio_ingress_unittests") {
+ testonly = true
+ sources = [ "audio_ingress_unittest.cc" ]
+ deps = [
+ "..:audio_egress",
+ "..:audio_ingress",
+ "../../../api:transport_api",
+ "../../../api/audio_codecs:builtin_audio_decoder_factory",
+ "../../../api/audio_codecs:builtin_audio_encoder_factory",
+ "../../../api/task_queue:default_task_queue_factory",
+ "../../../modules/audio_mixer:audio_mixer_test_utils",
+ "../../../modules/rtp_rtcp:rtp_rtcp",
+ "../../../rtc_base:logging",
+ "../../../rtc_base:rtc_event",
+ "../../../test:mock_transport",
+ "../../../test:run_loop",
+ "../../../test:test_support",
+ ]
+ }
+
+ rtc_library("audio_egress_unittests") {
+ testonly = true
+ sources = [ "audio_egress_unittest.cc" ]
+ deps = [
+ "..:audio_egress",
+ "../../../api:transport_api",
+ "../../../api/audio_codecs:builtin_audio_encoder_factory",
+ "../../../api/task_queue:default_task_queue_factory",
+ "../../../modules/audio_mixer:audio_mixer_test_utils",
+ "../../../modules/rtp_rtcp:rtp_rtcp",
+ "../../../modules/rtp_rtcp:rtp_rtcp_format",
+ "../../../rtc_base:logging",
+ "../../../rtc_base:rtc_event",
+ "../../../test:mock_transport",
+ "../../../test:run_loop",
+ "../../../test:test_support",
+ ]
+ }
+}
diff --git a/third_party/libwebrtc/audio/voip/test/audio_channel_unittest.cc b/third_party/libwebrtc/audio/voip/test/audio_channel_unittest.cc
new file mode 100644
index 0000000000..8955810429
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/test/audio_channel_unittest.cc
@@ -0,0 +1,357 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/audio_channel.h"
+
+#include "absl/functional/any_invocable.h"
+#include "api/audio_codecs/builtin_audio_decoder_factory.h"
+#include "api/audio_codecs/builtin_audio_encoder_factory.h"
+#include "api/call/transport.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "audio/voip/test/mock_task_queue.h"
+#include "modules/audio_mixer/audio_mixer_impl.h"
+#include "modules/audio_mixer/sine_wave_generator.h"
+#include "modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "rtc_base/logging.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/mock_transport.h"
+
+namespace webrtc {
+namespace {
+
+using ::testing::Invoke;
+using ::testing::NiceMock;
+using ::testing::Return;
+using ::testing::Unused;
+
+constexpr uint64_t kStartTime = 123456789;
+constexpr uint32_t kLocalSsrc = 0xdeadc0de;
+constexpr int16_t kAudioLevel = 3004; // used for sine wave level
+constexpr int kPcmuPayload = 0;
+
+class AudioChannelTest : public ::testing::Test {
+ public:
+ const SdpAudioFormat kPcmuFormat = {"pcmu", 8000, 1};
+
+ AudioChannelTest()
+ : fake_clock_(kStartTime), wave_generator_(1000.0, kAudioLevel) {
+ task_queue_factory_ = std::make_unique<MockTaskQueueFactory>(&task_queue_);
+ audio_mixer_ = AudioMixerImpl::Create();
+ encoder_factory_ = CreateBuiltinAudioEncoderFactory();
+ decoder_factory_ = CreateBuiltinAudioDecoderFactory();
+
+ // By default, run the queued task immediately.
+ ON_CALL(task_queue_, PostTask)
+ .WillByDefault(
+ [](absl::AnyInvocable<void() &&> task) { std::move(task)(); });
+ }
+
+ void SetUp() override { audio_channel_ = CreateAudioChannel(kLocalSsrc); }
+
+ void TearDown() override { audio_channel_ = nullptr; }
+
+ rtc::scoped_refptr<AudioChannel> CreateAudioChannel(uint32_t ssrc) {
+ // Use same audio mixer here for simplicity sake as we are not checking
+ // audio activity of RTP in our testcases. If we need to do test on audio
+ // signal activity then we need to assign audio mixer for each channel.
+ // Also this uses the same transport object for different audio channel to
+ // simplify network routing logic.
+ rtc::scoped_refptr<AudioChannel> audio_channel =
+ rtc::make_ref_counted<AudioChannel>(
+ &transport_, ssrc, task_queue_factory_.get(), audio_mixer_.get(),
+ decoder_factory_);
+ audio_channel->SetEncoder(kPcmuPayload, kPcmuFormat,
+ encoder_factory_->MakeAudioEncoder(
+ kPcmuPayload, kPcmuFormat, absl::nullopt));
+ audio_channel->SetReceiveCodecs({{kPcmuPayload, kPcmuFormat}});
+ audio_channel->StartSend();
+ audio_channel->StartPlay();
+ return audio_channel;
+ }
+
+ std::unique_ptr<AudioFrame> GetAudioFrame(int order) {
+ auto frame = std::make_unique<AudioFrame>();
+ frame->sample_rate_hz_ = kPcmuFormat.clockrate_hz;
+ frame->samples_per_channel_ = kPcmuFormat.clockrate_hz / 100; // 10 ms.
+ frame->num_channels_ = kPcmuFormat.num_channels;
+ frame->timestamp_ = frame->samples_per_channel_ * order;
+ wave_generator_.GenerateNextFrame(frame.get());
+ return frame;
+ }
+
+ SimulatedClock fake_clock_;
+ SineWaveGenerator wave_generator_;
+ NiceMock<MockTransport> transport_;
+ NiceMock<MockTaskQueue> task_queue_;
+ std::unique_ptr<TaskQueueFactory> task_queue_factory_;
+ rtc::scoped_refptr<AudioMixer> audio_mixer_;
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory_;
+ rtc::scoped_refptr<AudioEncoderFactory> encoder_factory_;
+ rtc::scoped_refptr<AudioChannel> audio_channel_;
+};
+
+// Validate RTP packet generation by feeding audio frames with sine wave.
+// Resulted RTP packet is looped back into AudioChannel and gets decoded into
+// audio frame to see if it has some signal to indicate its validity.
+TEST_F(AudioChannelTest, PlayRtpByLocalLoop) {
+ auto loop_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ audio_channel_->ReceivedRTPPacket(
+ rtc::ArrayView<const uint8_t>(packet, length));
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillOnce(Invoke(loop_rtp));
+
+ auto audio_sender = audio_channel_->GetAudioSender();
+ audio_sender->SendAudioData(GetAudioFrame(0));
+ audio_sender->SendAudioData(GetAudioFrame(1));
+
+ AudioFrame empty_frame, audio_frame;
+ empty_frame.Mute();
+ empty_frame.mutable_data(); // This will zero out the data.
+ audio_frame.CopyFrom(empty_frame);
+ audio_mixer_->Mix(/*number_of_channels*/ 1, &audio_frame);
+
+ // We expect now audio frame to pick up something.
+ EXPECT_NE(memcmp(empty_frame.data(), audio_frame.data(),
+ AudioFrame::kMaxDataSizeBytes),
+ 0);
+}
+
+// Validate assigned local SSRC is resulted in RTP packet.
+TEST_F(AudioChannelTest, VerifyLocalSsrcAsAssigned) {
+ RtpPacketReceived rtp;
+ auto loop_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ rtp.Parse(packet, length);
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillOnce(Invoke(loop_rtp));
+
+ auto audio_sender = audio_channel_->GetAudioSender();
+ audio_sender->SendAudioData(GetAudioFrame(0));
+ audio_sender->SendAudioData(GetAudioFrame(1));
+
+ EXPECT_EQ(rtp.Ssrc(), kLocalSsrc);
+}
+
+// Check metrics after processing an RTP packet.
+TEST_F(AudioChannelTest, TestIngressStatistics) {
+ auto loop_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ audio_channel_->ReceivedRTPPacket(
+ rtc::ArrayView<const uint8_t>(packet, length));
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(loop_rtp));
+
+ auto audio_sender = audio_channel_->GetAudioSender();
+ audio_sender->SendAudioData(GetAudioFrame(0));
+ audio_sender->SendAudioData(GetAudioFrame(1));
+
+ AudioFrame audio_frame;
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+
+ absl::optional<IngressStatistics> ingress_stats =
+ audio_channel_->GetIngressStatistics();
+ EXPECT_TRUE(ingress_stats);
+ EXPECT_EQ(ingress_stats->neteq_stats.total_samples_received, 160ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.concealed_samples, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.concealment_events, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.inserted_samples_for_deceleration, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.removed_samples_for_acceleration, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.silent_concealed_samples, 0ULL);
+ // To extract the jitter buffer length in millisecond, jitter_buffer_delay_ms
+ // needs to be divided by jitter_buffer_emitted_count (number of samples).
+ EXPECT_EQ(ingress_stats->neteq_stats.jitter_buffer_delay_ms, 1600ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.jitter_buffer_emitted_count, 160ULL);
+ EXPECT_GT(ingress_stats->neteq_stats.jitter_buffer_target_delay_ms, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.interruption_count, 0);
+ EXPECT_EQ(ingress_stats->neteq_stats.total_interruption_duration_ms, 0);
+ EXPECT_DOUBLE_EQ(ingress_stats->total_duration, 0.02);
+
+ // Now without any RTP pending in jitter buffer pull more.
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+
+ // Send another RTP packet to intentionally break PLC.
+ audio_sender->SendAudioData(GetAudioFrame(2));
+ audio_sender->SendAudioData(GetAudioFrame(3));
+
+ ingress_stats = audio_channel_->GetIngressStatistics();
+ EXPECT_TRUE(ingress_stats);
+ EXPECT_EQ(ingress_stats->neteq_stats.total_samples_received, 320ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.concealed_samples, 168ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.concealment_events, 1ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.inserted_samples_for_deceleration, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.removed_samples_for_acceleration, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.silent_concealed_samples, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.jitter_buffer_delay_ms, 1600ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.jitter_buffer_emitted_count, 160ULL);
+ EXPECT_GT(ingress_stats->neteq_stats.jitter_buffer_target_delay_ms, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.interruption_count, 0);
+ EXPECT_EQ(ingress_stats->neteq_stats.total_interruption_duration_ms, 0);
+ EXPECT_DOUBLE_EQ(ingress_stats->total_duration, 0.04);
+
+ // Pull the last RTP packet.
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+
+ ingress_stats = audio_channel_->GetIngressStatistics();
+ EXPECT_TRUE(ingress_stats);
+ EXPECT_EQ(ingress_stats->neteq_stats.total_samples_received, 480ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.concealed_samples, 168ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.concealment_events, 1ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.inserted_samples_for_deceleration, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.removed_samples_for_acceleration, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.silent_concealed_samples, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.jitter_buffer_delay_ms, 3200ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.jitter_buffer_emitted_count, 320ULL);
+ EXPECT_GT(ingress_stats->neteq_stats.jitter_buffer_target_delay_ms, 0ULL);
+ EXPECT_EQ(ingress_stats->neteq_stats.interruption_count, 0);
+ EXPECT_EQ(ingress_stats->neteq_stats.total_interruption_duration_ms, 0);
+ EXPECT_DOUBLE_EQ(ingress_stats->total_duration, 0.06);
+}
+
+// Check ChannelStatistics metric after processing RTP and RTCP packets.
+TEST_F(AudioChannelTest, TestChannelStatistics) {
+ auto loop_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ audio_channel_->ReceivedRTPPacket(
+ rtc::ArrayView<const uint8_t>(packet, length));
+ return true;
+ };
+ auto loop_rtcp = [&](const uint8_t* packet, size_t length) {
+ audio_channel_->ReceivedRTCPPacket(
+ rtc::ArrayView<const uint8_t>(packet, length));
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(loop_rtp));
+ EXPECT_CALL(transport_, SendRtcp).WillRepeatedly(Invoke(loop_rtcp));
+
+ // Simulate microphone giving audio frame (10 ms). This will trigger tranport
+ // to send RTP as handled in loop_rtp above.
+ auto audio_sender = audio_channel_->GetAudioSender();
+ audio_sender->SendAudioData(GetAudioFrame(0));
+ audio_sender->SendAudioData(GetAudioFrame(1));
+
+ // Simulate speaker requesting audio frame (10 ms). This will trigger VoIP
+ // engine to fetch audio samples from RTP packets stored in jitter buffer.
+ AudioFrame audio_frame;
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+
+ // Force sending RTCP SR report in order to have remote_rtcp field available
+ // in channel statistics. This will trigger tranport to send RTCP as handled
+ // in loop_rtcp above.
+ audio_channel_->SendRTCPReportForTesting(kRtcpSr);
+
+ absl::optional<ChannelStatistics> channel_stats =
+ audio_channel_->GetChannelStatistics();
+ EXPECT_TRUE(channel_stats);
+
+ EXPECT_EQ(channel_stats->packets_sent, 1ULL);
+ EXPECT_EQ(channel_stats->bytes_sent, 160ULL);
+
+ EXPECT_EQ(channel_stats->packets_received, 1ULL);
+ EXPECT_EQ(channel_stats->bytes_received, 160ULL);
+ EXPECT_EQ(channel_stats->jitter, 0);
+ EXPECT_EQ(channel_stats->packets_lost, 0);
+ EXPECT_EQ(channel_stats->remote_ssrc.value(), kLocalSsrc);
+
+ EXPECT_TRUE(channel_stats->remote_rtcp.has_value());
+
+ EXPECT_EQ(channel_stats->remote_rtcp->jitter, 0);
+ EXPECT_EQ(channel_stats->remote_rtcp->packets_lost, 0);
+ EXPECT_EQ(channel_stats->remote_rtcp->fraction_lost, 0);
+ EXPECT_GT(channel_stats->remote_rtcp->last_report_received_timestamp_ms, 0);
+ EXPECT_FALSE(channel_stats->remote_rtcp->round_trip_time.has_value());
+}
+
+// Check ChannelStatistics RTT metric after processing RTP and RTCP packets
+// using three audio channels where each represents media endpoint.
+//
+// 1) AC1 <- RTP/RTCP -> AC2
+// 2) AC1 <- RTP/RTCP -> AC3
+//
+// During step 1), AC1 should be able to check RTT from AC2's SSRC.
+// During step 2), AC1 should be able to check RTT from AC3's SSRC.
+TEST_F(AudioChannelTest, RttIsAvailableAfterChangeOfRemoteSsrc) {
+ // Create AC2 and AC3.
+ constexpr uint32_t kAc2Ssrc = 0xdeadbeef;
+ constexpr uint32_t kAc3Ssrc = 0xdeafbeef;
+
+ auto ac_2 = CreateAudioChannel(kAc2Ssrc);
+ auto ac_3 = CreateAudioChannel(kAc3Ssrc);
+
+ auto send_recv_rtp = [&](rtc::scoped_refptr<AudioChannel> rtp_sender,
+ rtc::scoped_refptr<AudioChannel> rtp_receiver) {
+ // Setup routing logic via transport_.
+ auto route_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ rtp_receiver->ReceivedRTPPacket(rtc::MakeArrayView(packet, length));
+ return true;
+ };
+ ON_CALL(transport_, SendRtp).WillByDefault(route_rtp);
+
+ // This will trigger route_rtp callback via transport_.
+ rtp_sender->GetAudioSender()->SendAudioData(GetAudioFrame(0));
+ rtp_sender->GetAudioSender()->SendAudioData(GetAudioFrame(1));
+
+ // Process received RTP in receiver.
+ AudioFrame audio_frame;
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+ audio_mixer_->Mix(/*number_of_channels=*/1, &audio_frame);
+
+ // Revert to default to avoid using reference in route_rtp lambda.
+ ON_CALL(transport_, SendRtp).WillByDefault(Return(true));
+ };
+
+ auto send_recv_rtcp = [&](rtc::scoped_refptr<AudioChannel> rtcp_sender,
+ rtc::scoped_refptr<AudioChannel> rtcp_receiver) {
+ // Setup routing logic via transport_.
+ auto route_rtcp = [&](const uint8_t* packet, size_t length) {
+ rtcp_receiver->ReceivedRTCPPacket(rtc::MakeArrayView(packet, length));
+ return true;
+ };
+ ON_CALL(transport_, SendRtcp).WillByDefault(route_rtcp);
+
+ // This will trigger route_rtcp callback via transport_.
+ rtcp_sender->SendRTCPReportForTesting(kRtcpSr);
+
+ // Revert to default to avoid using reference in route_rtcp lambda.
+ ON_CALL(transport_, SendRtcp).WillByDefault(Return(true));
+ };
+
+ // AC1 <-- RTP/RTCP --> AC2
+ send_recv_rtp(audio_channel_, ac_2);
+ send_recv_rtp(ac_2, audio_channel_);
+ send_recv_rtcp(audio_channel_, ac_2);
+ send_recv_rtcp(ac_2, audio_channel_);
+
+ absl::optional<ChannelStatistics> channel_stats =
+ audio_channel_->GetChannelStatistics();
+ ASSERT_TRUE(channel_stats);
+ EXPECT_EQ(channel_stats->remote_ssrc, kAc2Ssrc);
+ ASSERT_TRUE(channel_stats->remote_rtcp);
+ EXPECT_GT(channel_stats->remote_rtcp->round_trip_time, 0.0);
+
+ // AC1 <-- RTP/RTCP --> AC3
+ send_recv_rtp(audio_channel_, ac_3);
+ send_recv_rtp(ac_3, audio_channel_);
+ send_recv_rtcp(audio_channel_, ac_3);
+ send_recv_rtcp(ac_3, audio_channel_);
+
+ channel_stats = audio_channel_->GetChannelStatistics();
+ ASSERT_TRUE(channel_stats);
+ EXPECT_EQ(channel_stats->remote_ssrc, kAc3Ssrc);
+ ASSERT_TRUE(channel_stats->remote_rtcp);
+ EXPECT_GT(channel_stats->remote_rtcp->round_trip_time, 0.0);
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/test/audio_egress_unittest.cc b/third_party/libwebrtc/audio/voip/test/audio_egress_unittest.cc
new file mode 100644
index 0000000000..34c5585347
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/test/audio_egress_unittest.cc
@@ -0,0 +1,327 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/audio_egress.h"
+
+#include "api/audio_codecs/builtin_audio_encoder_factory.h"
+#include "api/call/transport.h"
+#include "api/task_queue/default_task_queue_factory.h"
+#include "modules/audio_mixer/sine_wave_generator.h"
+#include "modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_impl2.h"
+#include "rtc_base/event.h"
+#include "rtc_base/logging.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/mock_transport.h"
+#include "test/run_loop.h"
+
+namespace webrtc {
+namespace {
+
+using ::testing::Invoke;
+using ::testing::NiceMock;
+using ::testing::Unused;
+
+std::unique_ptr<ModuleRtpRtcpImpl2> CreateRtpStack(Clock* clock,
+ Transport* transport,
+ uint32_t remote_ssrc) {
+ RtpRtcpInterface::Configuration rtp_config;
+ rtp_config.clock = clock;
+ rtp_config.audio = true;
+ rtp_config.rtcp_report_interval_ms = 5000;
+ rtp_config.outgoing_transport = transport;
+ rtp_config.local_media_ssrc = remote_ssrc;
+ auto rtp_rtcp = ModuleRtpRtcpImpl2::Create(rtp_config);
+ rtp_rtcp->SetSendingMediaStatus(false);
+ rtp_rtcp->SetRTCPStatus(RtcpMode::kCompound);
+ return rtp_rtcp;
+}
+
+constexpr int16_t kAudioLevel = 3004; // Used for sine wave level.
+
+// AudioEgressTest configures audio egress by using Rtp Stack, fake clock,
+// and task queue factory. Encoder factory is needed to create codec and
+// configure the RTP stack in audio egress.
+class AudioEgressTest : public ::testing::Test {
+ public:
+ static constexpr uint16_t kSeqNum = 12345;
+ static constexpr uint64_t kStartTime = 123456789;
+ static constexpr uint32_t kRemoteSsrc = 0xDEADBEEF;
+ const SdpAudioFormat kPcmuFormat = {"pcmu", 8000, 1};
+
+ AudioEgressTest()
+ : fake_clock_(kStartTime), wave_generator_(1000.0, kAudioLevel) {
+ task_queue_factory_ = CreateDefaultTaskQueueFactory();
+ encoder_factory_ = CreateBuiltinAudioEncoderFactory();
+ }
+
+ // Prepare test on audio egress by using PCMu codec with specific
+ // sequence number and its status to be running.
+ void SetUp() override {
+ rtp_rtcp_ = CreateRtpStack(&fake_clock_, &transport_, kRemoteSsrc);
+ egress_ = std::make_unique<AudioEgress>(rtp_rtcp_.get(), &fake_clock_,
+ task_queue_factory_.get());
+ constexpr int kPcmuPayload = 0;
+ egress_->SetEncoder(kPcmuPayload, kPcmuFormat,
+ encoder_factory_->MakeAudioEncoder(
+ kPcmuPayload, kPcmuFormat, absl::nullopt));
+ egress_->StartSend();
+ rtp_rtcp_->SetSequenceNumber(kSeqNum);
+ rtp_rtcp_->SetSendingStatus(true);
+ }
+
+ // Make sure we have shut down rtp stack and reset egress for each test.
+ void TearDown() override {
+ egress_->StopSend();
+ rtp_rtcp_->SetSendingStatus(false);
+ egress_.reset();
+ rtp_rtcp_.reset();
+ }
+
+ // Create an audio frame prepared for pcmu encoding. Timestamp is
+ // increased per RTP specification which is the number of samples it contains.
+ // Wave generator writes sine wave which has expected high level set
+ // by kAudioLevel.
+ std::unique_ptr<AudioFrame> GetAudioFrame(int order) {
+ auto frame = std::make_unique<AudioFrame>();
+ frame->sample_rate_hz_ = kPcmuFormat.clockrate_hz;
+ frame->samples_per_channel_ = kPcmuFormat.clockrate_hz / 100; // 10 ms.
+ frame->num_channels_ = kPcmuFormat.num_channels;
+ frame->timestamp_ = frame->samples_per_channel_ * order;
+ wave_generator_.GenerateNextFrame(frame.get());
+ return frame;
+ }
+
+ test::RunLoop run_loop_;
+ // SimulatedClock doesn't directly affect this testcase as the the
+ // AudioFrame's timestamp is driven by GetAudioFrame.
+ SimulatedClock fake_clock_;
+ NiceMock<MockTransport> transport_;
+ SineWaveGenerator wave_generator_;
+ std::unique_ptr<ModuleRtpRtcpImpl2> rtp_rtcp_;
+ std::unique_ptr<TaskQueueFactory> task_queue_factory_;
+ rtc::scoped_refptr<AudioEncoderFactory> encoder_factory_;
+ std::unique_ptr<AudioEgress> egress_;
+};
+
+TEST_F(AudioEgressTest, SendingStatusAfterStartAndStop) {
+ EXPECT_TRUE(egress_->IsSending());
+ egress_->StopSend();
+ EXPECT_FALSE(egress_->IsSending());
+}
+
+TEST_F(AudioEgressTest, ProcessAudioWithMute) {
+ constexpr int kExpected = 10;
+ rtc::Event event;
+ int rtp_count = 0;
+ RtpPacketReceived rtp;
+ auto rtp_sent = [&](const uint8_t* packet, size_t length, Unused) {
+ rtp.Parse(packet, length);
+ if (++rtp_count == kExpected) {
+ event.Set();
+ }
+ return true;
+ };
+
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(rtp_sent));
+
+ egress_->SetMute(true);
+
+ // Two 10 ms audio frames will result in rtp packet with ptime 20.
+ for (size_t i = 0; i < kExpected * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+
+ event.Wait(TimeDelta::Seconds(1));
+ EXPECT_EQ(rtp_count, kExpected);
+
+ // we expect on pcmu payload to result in 255 for silenced payload
+ RTPHeader header;
+ rtp.GetHeader(&header);
+ size_t packet_length = rtp.size();
+ size_t payload_length = packet_length - header.headerLength;
+ size_t payload_data_length = payload_length - header.paddingLength;
+ const uint8_t* payload = rtp.data() + header.headerLength;
+ for (size_t i = 0; i < payload_data_length; ++i) {
+ EXPECT_EQ(*payload++, 255);
+ }
+}
+
+TEST_F(AudioEgressTest, ProcessAudioWithSineWave) {
+ constexpr int kExpected = 10;
+ rtc::Event event;
+ int rtp_count = 0;
+ RtpPacketReceived rtp;
+ auto rtp_sent = [&](const uint8_t* packet, size_t length, Unused) {
+ rtp.Parse(packet, length);
+ if (++rtp_count == kExpected) {
+ event.Set();
+ }
+ return true;
+ };
+
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(rtp_sent));
+
+ // Two 10 ms audio frames will result in rtp packet with ptime 20.
+ for (size_t i = 0; i < kExpected * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+
+ event.Wait(TimeDelta::Seconds(1));
+ EXPECT_EQ(rtp_count, kExpected);
+
+ // we expect on pcmu to result in < 255 for payload with sine wave
+ RTPHeader header;
+ rtp.GetHeader(&header);
+ size_t packet_length = rtp.size();
+ size_t payload_length = packet_length - header.headerLength;
+ size_t payload_data_length = payload_length - header.paddingLength;
+ const uint8_t* payload = rtp.data() + header.headerLength;
+ for (size_t i = 0; i < payload_data_length; ++i) {
+ EXPECT_NE(*payload++, 255);
+ }
+}
+
+TEST_F(AudioEgressTest, SkipAudioEncodingAfterStopSend) {
+ constexpr int kExpected = 10;
+ rtc::Event event;
+ int rtp_count = 0;
+ auto rtp_sent = [&](const uint8_t* packet, size_t length, Unused) {
+ if (++rtp_count == kExpected) {
+ event.Set();
+ }
+ return true;
+ };
+
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(rtp_sent));
+
+ // Two 10 ms audio frames will result in rtp packet with ptime 20.
+ for (size_t i = 0; i < kExpected * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+
+ event.Wait(TimeDelta::Seconds(1));
+ EXPECT_EQ(rtp_count, kExpected);
+
+ // Now stop send and yet feed more data.
+ egress_->StopSend();
+
+ // It should be safe to exit the test case while encoder_queue_ has
+ // outstanding data to process. We are making sure that this doesn't
+ // result in crahses or sanitizer errors due to remaining data.
+ for (size_t i = 0; i < kExpected * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+}
+
+TEST_F(AudioEgressTest, ChangeEncoderFromPcmuToOpus) {
+ absl::optional<SdpAudioFormat> pcmu = egress_->GetEncoderFormat();
+ EXPECT_TRUE(pcmu);
+ EXPECT_EQ(pcmu->clockrate_hz, kPcmuFormat.clockrate_hz);
+ EXPECT_EQ(pcmu->num_channels, kPcmuFormat.num_channels);
+
+ constexpr int kOpusPayload = 120;
+ const SdpAudioFormat kOpusFormat = {"opus", 48000, 2};
+
+ egress_->SetEncoder(kOpusPayload, kOpusFormat,
+ encoder_factory_->MakeAudioEncoder(
+ kOpusPayload, kOpusFormat, absl::nullopt));
+
+ absl::optional<SdpAudioFormat> opus = egress_->GetEncoderFormat();
+ EXPECT_TRUE(opus);
+ EXPECT_EQ(opus->clockrate_hz, kOpusFormat.clockrate_hz);
+ EXPECT_EQ(opus->num_channels, kOpusFormat.num_channels);
+}
+
+TEST_F(AudioEgressTest, SendDTMF) {
+ constexpr int kExpected = 7;
+ constexpr int kPayloadType = 100;
+ constexpr int kDurationMs = 100;
+ constexpr int kSampleRate = 8000;
+ constexpr int kEvent = 3;
+
+ egress_->RegisterTelephoneEventType(kPayloadType, kSampleRate);
+ // 100 ms duration will produce total 7 DTMF
+ // 1 @ 20 ms, 2 @ 40 ms, 3 @ 60 ms, 4 @ 80 ms
+ // 5, 6, 7 @ 100 ms (last one sends 3 dtmf)
+ egress_->SendTelephoneEvent(kEvent, kDurationMs);
+
+ rtc::Event event;
+ int dtmf_count = 0;
+ auto is_dtmf = [&](RtpPacketReceived& rtp) {
+ return (rtp.PayloadType() == kPayloadType &&
+ rtp.SequenceNumber() == kSeqNum + dtmf_count &&
+ rtp.padding_size() == 0 && rtp.Marker() == (dtmf_count == 0) &&
+ rtp.Ssrc() == kRemoteSsrc);
+ };
+
+ // It's possible that we may have actual audio RTP packets along with
+ // DTMF packtets. We are only interested in the exact number of DTMF
+ // packets rtp stack is emitting.
+ auto rtp_sent = [&](const uint8_t* packet, size_t length, Unused) {
+ RtpPacketReceived rtp;
+ rtp.Parse(packet, length);
+ if (is_dtmf(rtp) && ++dtmf_count == kExpected) {
+ event.Set();
+ }
+ return true;
+ };
+
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(rtp_sent));
+
+ // Two 10 ms audio frames will result in rtp packet with ptime 20.
+ for (size_t i = 0; i < kExpected * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+
+ event.Wait(TimeDelta::Seconds(1));
+ EXPECT_EQ(dtmf_count, kExpected);
+}
+
+TEST_F(AudioEgressTest, TestAudioInputLevelAndEnergyDuration) {
+ // Per audio_level's kUpdateFrequency, we need more than 10 audio samples to
+ // get audio level from input source.
+ constexpr int kExpected = 6;
+ rtc::Event event;
+ int rtp_count = 0;
+ auto rtp_sent = [&](const uint8_t* packet, size_t length, Unused) {
+ if (++rtp_count == kExpected) {
+ event.Set();
+ }
+ return true;
+ };
+
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(rtp_sent));
+
+ // Two 10 ms audio frames will result in rtp packet with ptime 20.
+ for (size_t i = 0; i < kExpected * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+
+ event.Wait(/*give_up_after=*/TimeDelta::Seconds(1));
+ EXPECT_EQ(rtp_count, kExpected);
+
+ constexpr double kExpectedEnergy = 0.00016809565587789564;
+ constexpr double kExpectedDuration = 0.11999999999999998;
+
+ EXPECT_EQ(egress_->GetInputAudioLevel(), kAudioLevel);
+ EXPECT_DOUBLE_EQ(egress_->GetInputTotalEnergy(), kExpectedEnergy);
+ EXPECT_DOUBLE_EQ(egress_->GetInputTotalDuration(), kExpectedDuration);
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/test/audio_ingress_unittest.cc b/third_party/libwebrtc/audio/voip/test/audio_ingress_unittest.cc
new file mode 100644
index 0000000000..3c309dbf82
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/test/audio_ingress_unittest.cc
@@ -0,0 +1,238 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/audio_ingress.h"
+
+#include "api/audio_codecs/builtin_audio_decoder_factory.h"
+#include "api/audio_codecs/builtin_audio_encoder_factory.h"
+#include "api/call/transport.h"
+#include "api/task_queue/default_task_queue_factory.h"
+#include "audio/voip/audio_egress.h"
+#include "modules/audio_mixer/sine_wave_generator.h"
+#include "modules/rtp_rtcp/source/rtp_rtcp_impl2.h"
+#include "rtc_base/event.h"
+#include "rtc_base/logging.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/mock_transport.h"
+#include "test/run_loop.h"
+
+namespace webrtc {
+namespace {
+
+using ::testing::Invoke;
+using ::testing::NiceMock;
+using ::testing::Unused;
+
+constexpr int16_t kAudioLevel = 3004; // Used for sine wave level.
+
+class AudioIngressTest : public ::testing::Test {
+ public:
+ const SdpAudioFormat kPcmuFormat = {"pcmu", 8000, 1};
+
+ AudioIngressTest()
+ : fake_clock_(123456789), wave_generator_(1000.0, kAudioLevel) {
+ receive_statistics_ = ReceiveStatistics::Create(&fake_clock_);
+
+ RtpRtcpInterface::Configuration rtp_config;
+ rtp_config.clock = &fake_clock_;
+ rtp_config.audio = true;
+ rtp_config.receive_statistics = receive_statistics_.get();
+ rtp_config.rtcp_report_interval_ms = 5000;
+ rtp_config.outgoing_transport = &transport_;
+ rtp_config.local_media_ssrc = 0xdeadc0de;
+ rtp_rtcp_ = ModuleRtpRtcpImpl2::Create(rtp_config);
+
+ rtp_rtcp_->SetSendingMediaStatus(false);
+ rtp_rtcp_->SetRTCPStatus(RtcpMode::kCompound);
+
+ task_queue_factory_ = CreateDefaultTaskQueueFactory();
+ encoder_factory_ = CreateBuiltinAudioEncoderFactory();
+ decoder_factory_ = CreateBuiltinAudioDecoderFactory();
+ }
+
+ void SetUp() override {
+ constexpr int kPcmuPayload = 0;
+ ingress_ = std::make_unique<AudioIngress>(rtp_rtcp_.get(), &fake_clock_,
+ receive_statistics_.get(),
+ decoder_factory_);
+ ingress_->SetReceiveCodecs({{kPcmuPayload, kPcmuFormat}});
+
+ egress_ = std::make_unique<AudioEgress>(rtp_rtcp_.get(), &fake_clock_,
+ task_queue_factory_.get());
+ egress_->SetEncoder(kPcmuPayload, kPcmuFormat,
+ encoder_factory_->MakeAudioEncoder(
+ kPcmuPayload, kPcmuFormat, absl::nullopt));
+ egress_->StartSend();
+ ingress_->StartPlay();
+ rtp_rtcp_->SetSendingStatus(true);
+ }
+
+ void TearDown() override {
+ rtp_rtcp_->SetSendingStatus(false);
+ ingress_->StopPlay();
+ egress_->StopSend();
+ egress_.reset();
+ ingress_.reset();
+ }
+
+ std::unique_ptr<AudioFrame> GetAudioFrame(int order) {
+ auto frame = std::make_unique<AudioFrame>();
+ frame->sample_rate_hz_ = kPcmuFormat.clockrate_hz;
+ frame->samples_per_channel_ = kPcmuFormat.clockrate_hz / 100; // 10 ms.
+ frame->num_channels_ = kPcmuFormat.num_channels;
+ frame->timestamp_ = frame->samples_per_channel_ * order;
+ wave_generator_.GenerateNextFrame(frame.get());
+ return frame;
+ }
+
+ test::RunLoop run_loop_;
+ SimulatedClock fake_clock_;
+ SineWaveGenerator wave_generator_;
+ NiceMock<MockTransport> transport_;
+ std::unique_ptr<ReceiveStatistics> receive_statistics_;
+ std::unique_ptr<ModuleRtpRtcpImpl2> rtp_rtcp_;
+ rtc::scoped_refptr<AudioEncoderFactory> encoder_factory_;
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory_;
+ std::unique_ptr<TaskQueueFactory> task_queue_factory_;
+ std::unique_ptr<AudioIngress> ingress_;
+ std::unique_ptr<AudioEgress> egress_;
+};
+
+TEST_F(AudioIngressTest, PlayingAfterStartAndStop) {
+ EXPECT_EQ(ingress_->IsPlaying(), true);
+ ingress_->StopPlay();
+ EXPECT_EQ(ingress_->IsPlaying(), false);
+}
+
+TEST_F(AudioIngressTest, GetAudioFrameAfterRtpReceived) {
+ rtc::Event event;
+ auto handle_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ ingress_->ReceivedRTPPacket(rtc::ArrayView<const uint8_t>(packet, length));
+ event.Set();
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(handle_rtp));
+ egress_->SendAudioData(GetAudioFrame(0));
+ egress_->SendAudioData(GetAudioFrame(1));
+ event.Wait(TimeDelta::Seconds(1));
+
+ AudioFrame audio_frame;
+ EXPECT_EQ(
+ ingress_->GetAudioFrameWithInfo(kPcmuFormat.clockrate_hz, &audio_frame),
+ AudioMixer::Source::AudioFrameInfo::kNormal);
+ EXPECT_FALSE(audio_frame.muted());
+ EXPECT_EQ(audio_frame.num_channels_, 1u);
+ EXPECT_EQ(audio_frame.samples_per_channel_,
+ static_cast<size_t>(kPcmuFormat.clockrate_hz / 100));
+ EXPECT_EQ(audio_frame.sample_rate_hz_, kPcmuFormat.clockrate_hz);
+ EXPECT_NE(audio_frame.timestamp_, 0u);
+ EXPECT_EQ(audio_frame.elapsed_time_ms_, 0);
+}
+
+TEST_F(AudioIngressTest, TestSpeechOutputLevelAndEnergyDuration) {
+ // Per audio_level's kUpdateFrequency, we need more than 10 audio samples to
+ // get audio level from output source.
+ constexpr int kNumRtp = 6;
+ int rtp_count = 0;
+ rtc::Event event;
+ auto handle_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ ingress_->ReceivedRTPPacket(rtc::ArrayView<const uint8_t>(packet, length));
+ if (++rtp_count == kNumRtp) {
+ event.Set();
+ }
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(handle_rtp));
+ for (int i = 0; i < kNumRtp * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+ event.Wait(/*give_up_after=*/TimeDelta::Seconds(1));
+
+ for (int i = 0; i < kNumRtp * 2; ++i) {
+ AudioFrame audio_frame;
+ EXPECT_EQ(
+ ingress_->GetAudioFrameWithInfo(kPcmuFormat.clockrate_hz, &audio_frame),
+ AudioMixer::Source::AudioFrameInfo::kNormal);
+ }
+ EXPECT_EQ(ingress_->GetOutputAudioLevel(), kAudioLevel);
+
+ constexpr double kExpectedEnergy = 0.00016809565587789564;
+ constexpr double kExpectedDuration = 0.11999999999999998;
+
+ EXPECT_DOUBLE_EQ(ingress_->GetOutputTotalEnergy(), kExpectedEnergy);
+ EXPECT_DOUBLE_EQ(ingress_->GetOutputTotalDuration(), kExpectedDuration);
+}
+
+TEST_F(AudioIngressTest, PreferredSampleRate) {
+ rtc::Event event;
+ auto handle_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ ingress_->ReceivedRTPPacket(rtc::ArrayView<const uint8_t>(packet, length));
+ event.Set();
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(handle_rtp));
+ egress_->SendAudioData(GetAudioFrame(0));
+ egress_->SendAudioData(GetAudioFrame(1));
+ event.Wait(TimeDelta::Seconds(1));
+
+ AudioFrame audio_frame;
+ EXPECT_EQ(
+ ingress_->GetAudioFrameWithInfo(kPcmuFormat.clockrate_hz, &audio_frame),
+ AudioMixer::Source::AudioFrameInfo::kNormal);
+ EXPECT_EQ(ingress_->PreferredSampleRate(), kPcmuFormat.clockrate_hz);
+}
+
+// This test highlights the case where caller invokes StopPlay() which then
+// AudioIngress should play silence frame afterwards.
+TEST_F(AudioIngressTest, GetMutedAudioFrameAfterRtpReceivedAndStopPlay) {
+ // StopPlay before we start sending RTP packet with sine wave.
+ ingress_->StopPlay();
+
+ // Send 6 RTP packets to generate more than 100 ms audio sample to get
+ // valid speech level.
+ constexpr int kNumRtp = 6;
+ int rtp_count = 0;
+ rtc::Event event;
+ auto handle_rtp = [&](const uint8_t* packet, size_t length, Unused) {
+ ingress_->ReceivedRTPPacket(rtc::ArrayView<const uint8_t>(packet, length));
+ if (++rtp_count == kNumRtp) {
+ event.Set();
+ }
+ return true;
+ };
+ EXPECT_CALL(transport_, SendRtp).WillRepeatedly(Invoke(handle_rtp));
+ for (int i = 0; i < kNumRtp * 2; i++) {
+ egress_->SendAudioData(GetAudioFrame(i));
+ fake_clock_.AdvanceTimeMilliseconds(10);
+ }
+ event.Wait(/*give_up_after=*/TimeDelta::Seconds(1));
+
+ for (int i = 0; i < kNumRtp * 2; ++i) {
+ AudioFrame audio_frame;
+ EXPECT_EQ(
+ ingress_->GetAudioFrameWithInfo(kPcmuFormat.clockrate_hz, &audio_frame),
+ AudioMixer::Source::AudioFrameInfo::kMuted);
+ const int16_t* audio_data = audio_frame.data();
+ size_t length =
+ audio_frame.samples_per_channel_ * audio_frame.num_channels_;
+ for (size_t j = 0; j < length; ++j) {
+ EXPECT_EQ(audio_data[j], 0);
+ }
+ }
+
+ // Now we should still see valid speech output level as StopPlay won't affect
+ // the measurement.
+ EXPECT_EQ(ingress_->GetOutputAudioLevel(), kAudioLevel);
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/test/mock_task_queue.h b/third_party/libwebrtc/audio/voip/test/mock_task_queue.h
new file mode 100644
index 0000000000..547b0d3f75
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/test/mock_task_queue.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_VOIP_TEST_MOCK_TASK_QUEUE_H_
+#define AUDIO_VOIP_TEST_MOCK_TASK_QUEUE_H_
+
+#include <memory>
+
+#include "api/task_queue/task_queue_factory.h"
+#include "api/task_queue/test/mock_task_queue_base.h"
+#include "test/gmock.h"
+
+namespace webrtc {
+
+// MockTaskQueue enables immediate task run from global TaskQueueBase.
+// It's necessary for some tests depending on TaskQueueBase internally.
+class MockTaskQueue : public MockTaskQueueBase {
+ public:
+ MockTaskQueue() : current_(this) {}
+
+ // Delete is deliberately defined as no-op as MockTaskQueue is expected to
+ // hold onto current global TaskQueueBase throughout the testing.
+ void Delete() override {}
+
+ private:
+ CurrentTaskQueueSetter current_;
+};
+
+class MockTaskQueueFactory : public TaskQueueFactory {
+ public:
+ explicit MockTaskQueueFactory(MockTaskQueue* task_queue)
+ : task_queue_(task_queue) {}
+
+ std::unique_ptr<TaskQueueBase, TaskQueueDeleter> CreateTaskQueue(
+ absl::string_view name,
+ Priority priority) const override {
+ // Default MockTaskQueue::Delete is no-op, therefore it's safe to pass the
+ // raw pointer.
+ return std::unique_ptr<TaskQueueBase, TaskQueueDeleter>(task_queue_);
+ }
+
+ private:
+ MockTaskQueue* task_queue_;
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_VOIP_TEST_MOCK_TASK_QUEUE_H_
diff --git a/third_party/libwebrtc/audio/voip/test/voip_core_unittest.cc b/third_party/libwebrtc/audio/voip/test/voip_core_unittest.cc
new file mode 100644
index 0000000000..b432506b12
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/test/voip_core_unittest.cc
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/voip_core.h"
+
+#include "api/audio_codecs/builtin_audio_decoder_factory.h"
+#include "api/audio_codecs/builtin_audio_encoder_factory.h"
+#include "api/task_queue/default_task_queue_factory.h"
+#include "modules/audio_device/include/mock_audio_device.h"
+#include "modules/audio_processing/include/mock_audio_processing.h"
+#include "test/gtest.h"
+#include "test/mock_transport.h"
+#include "test/run_loop.h"
+
+namespace webrtc {
+namespace {
+
+using ::testing::NiceMock;
+using ::testing::Return;
+
+constexpr int kPcmuPayload = 0;
+constexpr int kPcmuSampleRateHz = 8000;
+constexpr int kDtmfEventDurationMs = 1000;
+constexpr DtmfEvent kDtmfEventCode = DtmfEvent::kDigitZero;
+
+class VoipCoreTest : public ::testing::Test {
+ public:
+ const SdpAudioFormat kPcmuFormat = {"pcmu", 8000, 1};
+
+ VoipCoreTest() { audio_device_ = test::MockAudioDeviceModule::CreateNice(); }
+
+ void SetUp() override {
+ auto encoder_factory = CreateBuiltinAudioEncoderFactory();
+ auto decoder_factory = CreateBuiltinAudioDecoderFactory();
+ rtc::scoped_refptr<AudioProcessing> audio_processing =
+ rtc::make_ref_counted<NiceMock<test::MockAudioProcessing>>();
+
+ voip_core_ = std::make_unique<VoipCore>(
+ std::move(encoder_factory), std::move(decoder_factory),
+ CreateDefaultTaskQueueFactory(), audio_device_,
+ std::move(audio_processing));
+ }
+
+ test::RunLoop run_loop_;
+ std::unique_ptr<VoipCore> voip_core_;
+ NiceMock<MockTransport> transport_;
+ rtc::scoped_refptr<test::MockAudioDeviceModule> audio_device_;
+};
+
+// Validate expected API calls that involves with VoipCore. Some verification is
+// involved with checking mock audio device.
+TEST_F(VoipCoreTest, BasicVoipCoreOperation) {
+ // Program mock as non-operational and ready to start.
+ EXPECT_CALL(*audio_device_, Recording()).WillOnce(Return(false));
+ EXPECT_CALL(*audio_device_, Playing()).WillOnce(Return(false));
+ EXPECT_CALL(*audio_device_, InitRecording()).WillOnce(Return(0));
+ EXPECT_CALL(*audio_device_, InitPlayout()).WillOnce(Return(0));
+ EXPECT_CALL(*audio_device_, StartRecording()).WillOnce(Return(0));
+ EXPECT_CALL(*audio_device_, StartPlayout()).WillOnce(Return(0));
+
+ auto channel = voip_core_->CreateChannel(&transport_, 0xdeadc0de);
+
+ EXPECT_EQ(voip_core_->SetSendCodec(channel, kPcmuPayload, kPcmuFormat),
+ VoipResult::kOk);
+ EXPECT_EQ(
+ voip_core_->SetReceiveCodecs(channel, {{kPcmuPayload, kPcmuFormat}}),
+ VoipResult::kOk);
+
+ EXPECT_EQ(voip_core_->StartSend(channel), VoipResult::kOk);
+ EXPECT_EQ(voip_core_->StartPlayout(channel), VoipResult::kOk);
+
+ EXPECT_EQ(voip_core_->RegisterTelephoneEventType(channel, kPcmuPayload,
+ kPcmuSampleRateHz),
+ VoipResult::kOk);
+
+ EXPECT_EQ(
+ voip_core_->SendDtmfEvent(channel, kDtmfEventCode, kDtmfEventDurationMs),
+ VoipResult::kOk);
+
+ // Program mock as operational that is ready to be stopped.
+ EXPECT_CALL(*audio_device_, Recording()).WillOnce(Return(true));
+ EXPECT_CALL(*audio_device_, Playing()).WillOnce(Return(true));
+ EXPECT_CALL(*audio_device_, StopRecording()).WillOnce(Return(0));
+ EXPECT_CALL(*audio_device_, StopPlayout()).WillOnce(Return(0));
+
+ EXPECT_EQ(voip_core_->StopSend(channel), VoipResult::kOk);
+ EXPECT_EQ(voip_core_->StopPlayout(channel), VoipResult::kOk);
+ EXPECT_EQ(voip_core_->ReleaseChannel(channel), VoipResult::kOk);
+}
+
+TEST_F(VoipCoreTest, ExpectFailToUseReleasedChannelId) {
+ auto channel = voip_core_->CreateChannel(&transport_, 0xdeadc0de);
+
+ // Release right after creation.
+ EXPECT_EQ(voip_core_->ReleaseChannel(channel), VoipResult::kOk);
+
+ // Now use released channel.
+
+ EXPECT_EQ(voip_core_->SetSendCodec(channel, kPcmuPayload, kPcmuFormat),
+ VoipResult::kInvalidArgument);
+ EXPECT_EQ(
+ voip_core_->SetReceiveCodecs(channel, {{kPcmuPayload, kPcmuFormat}}),
+ VoipResult::kInvalidArgument);
+ EXPECT_EQ(voip_core_->RegisterTelephoneEventType(channel, kPcmuPayload,
+ kPcmuSampleRateHz),
+ VoipResult::kInvalidArgument);
+ EXPECT_EQ(voip_core_->StartSend(channel), VoipResult::kInvalidArgument);
+ EXPECT_EQ(voip_core_->StartPlayout(channel), VoipResult::kInvalidArgument);
+ EXPECT_EQ(
+ voip_core_->SendDtmfEvent(channel, kDtmfEventCode, kDtmfEventDurationMs),
+ VoipResult::kInvalidArgument);
+}
+
+TEST_F(VoipCoreTest, SendDtmfEventWithoutRegistering) {
+ // Program mock as non-operational and ready to start send.
+ EXPECT_CALL(*audio_device_, Recording()).WillOnce(Return(false));
+ EXPECT_CALL(*audio_device_, InitRecording()).WillOnce(Return(0));
+ EXPECT_CALL(*audio_device_, StartRecording()).WillOnce(Return(0));
+
+ auto channel = voip_core_->CreateChannel(&transport_, 0xdeadc0de);
+
+ EXPECT_EQ(voip_core_->SetSendCodec(channel, kPcmuPayload, kPcmuFormat),
+ VoipResult::kOk);
+
+ EXPECT_EQ(voip_core_->StartSend(channel), VoipResult::kOk);
+ // Send Dtmf event without registering beforehand, thus payload
+ // type is not set and kFailedPrecondition is expected.
+ EXPECT_EQ(
+ voip_core_->SendDtmfEvent(channel, kDtmfEventCode, kDtmfEventDurationMs),
+ VoipResult::kFailedPrecondition);
+
+ // Program mock as sending and is ready to be stopped.
+ EXPECT_CALL(*audio_device_, Recording()).WillOnce(Return(true));
+ EXPECT_CALL(*audio_device_, StopRecording()).WillOnce(Return(0));
+
+ EXPECT_EQ(voip_core_->StopSend(channel), VoipResult::kOk);
+ EXPECT_EQ(voip_core_->ReleaseChannel(channel), VoipResult::kOk);
+}
+
+TEST_F(VoipCoreTest, SendDtmfEventWithoutStartSend) {
+ auto channel = voip_core_->CreateChannel(&transport_, 0xdeadc0de);
+
+ EXPECT_EQ(voip_core_->RegisterTelephoneEventType(channel, kPcmuPayload,
+ kPcmuSampleRateHz),
+ VoipResult::kOk);
+
+ // Send Dtmf event without calling StartSend beforehand, thus
+ // Dtmf events cannot be sent and kFailedPrecondition is expected.
+ EXPECT_EQ(
+ voip_core_->SendDtmfEvent(channel, kDtmfEventCode, kDtmfEventDurationMs),
+ VoipResult::kFailedPrecondition);
+
+ EXPECT_EQ(voip_core_->ReleaseChannel(channel), VoipResult::kOk);
+}
+
+TEST_F(VoipCoreTest, StartSendAndPlayoutWithoutSettingCodec) {
+ auto channel = voip_core_->CreateChannel(&transport_, 0xdeadc0de);
+
+ // Call StartSend and StartPlayout without setting send/receive
+ // codec. Code should see that codecs aren't set and return false.
+ EXPECT_EQ(voip_core_->StartSend(channel), VoipResult::kFailedPrecondition);
+ EXPECT_EQ(voip_core_->StartPlayout(channel), VoipResult::kFailedPrecondition);
+
+ EXPECT_EQ(voip_core_->ReleaseChannel(channel), VoipResult::kOk);
+}
+
+TEST_F(VoipCoreTest, StopSendAndPlayoutWithoutStarting) {
+ auto channel = voip_core_->CreateChannel(&transport_, 0xdeadc0de);
+
+ EXPECT_EQ(voip_core_->SetSendCodec(channel, kPcmuPayload, kPcmuFormat),
+ VoipResult::kOk);
+ EXPECT_EQ(
+ voip_core_->SetReceiveCodecs(channel, {{kPcmuPayload, kPcmuFormat}}),
+ VoipResult::kOk);
+
+ // Call StopSend and StopPlayout without starting them in
+ // the first place. Should see that it is already in the
+ // stopped state and return true.
+ EXPECT_EQ(voip_core_->StopSend(channel), VoipResult::kOk);
+ EXPECT_EQ(voip_core_->StopPlayout(channel), VoipResult::kOk);
+
+ EXPECT_EQ(voip_core_->ReleaseChannel(channel), VoipResult::kOk);
+}
+
+} // namespace
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/voip_core.cc b/third_party/libwebrtc/audio/voip/voip_core.cc
new file mode 100644
index 0000000000..8df1c594aa
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/voip_core.cc
@@ -0,0 +1,500 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "audio/voip/voip_core.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+
+#include "api/audio_codecs/audio_format.h"
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+
+namespace {
+
+// For Windows, use specific enum type to initialize default audio device as
+// defined in AudioDeviceModule::WindowsDeviceType.
+#if defined(WEBRTC_WIN)
+constexpr AudioDeviceModule::WindowsDeviceType kAudioDeviceId =
+ AudioDeviceModule::WindowsDeviceType::kDefaultCommunicationDevice;
+#else
+constexpr uint16_t kAudioDeviceId = 0;
+#endif // defined(WEBRTC_WIN)
+
+// Maximum value range limit on ChannelId. This can be increased without any
+// side effect and only set at this moderate value for better readability for
+// logging.
+static constexpr int kMaxChannelId = 100000;
+
+} // namespace
+
+VoipCore::VoipCore(rtc::scoped_refptr<AudioEncoderFactory> encoder_factory,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ std::unique_ptr<TaskQueueFactory> task_queue_factory,
+ rtc::scoped_refptr<AudioDeviceModule> audio_device_module,
+ rtc::scoped_refptr<AudioProcessing> audio_processing) {
+ encoder_factory_ = std::move(encoder_factory);
+ decoder_factory_ = std::move(decoder_factory);
+ task_queue_factory_ = std::move(task_queue_factory);
+ audio_device_module_ = std::move(audio_device_module);
+ audio_processing_ = std::move(audio_processing);
+ audio_mixer_ = AudioMixerImpl::Create();
+
+ // AudioTransportImpl depends on audio mixer and audio processing instances.
+ audio_transport_ = std::make_unique<AudioTransportImpl>(
+ audio_mixer_.get(), audio_processing_.get(), nullptr);
+}
+
+bool VoipCore::InitializeIfNeeded() {
+ // `audio_device_module_` internally owns a lock and the whole logic here
+ // needs to be executed atomically once using another lock in VoipCore.
+ // Further changes in this method will need to make sure that no deadlock is
+ // introduced in the future.
+ MutexLock lock(&lock_);
+
+ if (initialized_) {
+ return true;
+ }
+
+ // Initialize ADM.
+ if (audio_device_module_->Init() != 0) {
+ RTC_LOG(LS_ERROR) << "Failed to initialize the ADM.";
+ return false;
+ }
+
+ // Note that failures on initializing default recording/speaker devices are
+ // not considered to be fatal here. In certain case, caller may not care about
+ // recording device functioning (e.g webinar where only speaker is available).
+ // It's also possible that there are other audio devices available that may
+ // work.
+
+ // Initialize default speaker device.
+ if (audio_device_module_->SetPlayoutDevice(kAudioDeviceId) != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to set playout device.";
+ }
+ if (audio_device_module_->InitSpeaker() != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to access speaker.";
+ }
+
+ // Initialize default recording device.
+ if (audio_device_module_->SetRecordingDevice(kAudioDeviceId) != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to set recording device.";
+ }
+ if (audio_device_module_->InitMicrophone() != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to access microphone.";
+ }
+
+ // Set number of channels on speaker device.
+ bool available = false;
+ if (audio_device_module_->StereoPlayoutIsAvailable(&available) != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to query stereo playout.";
+ }
+ if (audio_device_module_->SetStereoPlayout(available) != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to set mono/stereo playout mode.";
+ }
+
+ // Set number of channels on recording device.
+ available = false;
+ if (audio_device_module_->StereoRecordingIsAvailable(&available) != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to query stereo recording.";
+ }
+ if (audio_device_module_->SetStereoRecording(available) != 0) {
+ RTC_LOG(LS_WARNING) << "Unable to set stereo recording mode.";
+ }
+
+ if (audio_device_module_->RegisterAudioCallback(audio_transport_.get()) !=
+ 0) {
+ RTC_LOG(LS_WARNING) << "Unable to register audio callback.";
+ }
+
+ initialized_ = true;
+
+ return true;
+}
+
+ChannelId VoipCore::CreateChannel(Transport* transport,
+ absl::optional<uint32_t> local_ssrc) {
+ ChannelId channel_id;
+
+ // Set local ssrc to random if not set by caller.
+ if (!local_ssrc) {
+ Random random(rtc::TimeMicros());
+ local_ssrc = random.Rand<uint32_t>();
+ }
+
+ rtc::scoped_refptr<AudioChannel> channel =
+ rtc::make_ref_counted<AudioChannel>(transport, local_ssrc.value(),
+ task_queue_factory_.get(),
+ audio_mixer_.get(), decoder_factory_);
+
+ {
+ MutexLock lock(&lock_);
+
+ channel_id = static_cast<ChannelId>(next_channel_id_);
+ channels_[channel_id] = channel;
+ next_channel_id_++;
+ if (next_channel_id_ >= kMaxChannelId) {
+ next_channel_id_ = 0;
+ }
+ }
+
+ // Set ChannelId in audio channel for logging/debugging purpose.
+ channel->SetId(channel_id);
+
+ return channel_id;
+}
+
+VoipResult VoipCore::ReleaseChannel(ChannelId channel_id) {
+ // Destroy channel outside of the lock.
+ rtc::scoped_refptr<AudioChannel> channel;
+
+ bool no_channels_after_release = false;
+
+ {
+ MutexLock lock(&lock_);
+
+ auto iter = channels_.find(channel_id);
+ if (iter != channels_.end()) {
+ channel = std::move(iter->second);
+ channels_.erase(iter);
+ }
+
+ no_channels_after_release = channels_.empty();
+ }
+
+ VoipResult status_code = VoipResult::kOk;
+ if (!channel) {
+ RTC_LOG(LS_WARNING) << "Channel " << channel_id << " not found";
+ status_code = VoipResult::kInvalidArgument;
+ }
+
+ if (no_channels_after_release) {
+ // TODO(bugs.webrtc.org/11581): unclear if we still need to clear `channel`
+ // here.
+ channel = nullptr;
+
+ // Make sure to stop playout on ADM if it is playing.
+ if (audio_device_module_->Playing()) {
+ if (audio_device_module_->StopPlayout() != 0) {
+ RTC_LOG(LS_WARNING) << "StopPlayout failed";
+ status_code = VoipResult::kInternal;
+ }
+ }
+ }
+
+ return status_code;
+}
+
+rtc::scoped_refptr<AudioChannel> VoipCore::GetChannel(ChannelId channel_id) {
+ rtc::scoped_refptr<AudioChannel> channel;
+ {
+ MutexLock lock(&lock_);
+ auto iter = channels_.find(channel_id);
+ if (iter != channels_.end()) {
+ channel = iter->second;
+ }
+ }
+ if (!channel) {
+ RTC_LOG(LS_ERROR) << "Channel " << channel_id << " not found";
+ }
+ return channel;
+}
+
+bool VoipCore::UpdateAudioTransportWithSenders() {
+ std::vector<AudioSender*> audio_senders;
+
+ // Gather a list of audio channel that are currently sending along with
+ // highest sampling rate and channel numbers to configure into audio
+ // transport.
+ int max_sampling_rate = 8000;
+ size_t max_num_channels = 1;
+ {
+ MutexLock lock(&lock_);
+ // Reserve to prevent run time vector re-allocation.
+ audio_senders.reserve(channels_.size());
+ for (auto kv : channels_) {
+ rtc::scoped_refptr<AudioChannel>& channel = kv.second;
+ if (channel->IsSendingMedia()) {
+ auto encoder_format = channel->GetEncoderFormat();
+ if (!encoder_format) {
+ RTC_LOG(LS_ERROR)
+ << "channel " << channel->GetId() << " encoder is not set";
+ continue;
+ }
+ audio_senders.push_back(channel->GetAudioSender());
+ max_sampling_rate =
+ std::max(max_sampling_rate, encoder_format->clockrate_hz);
+ max_num_channels =
+ std::max(max_num_channels, encoder_format->num_channels);
+ }
+ }
+ }
+
+ audio_transport_->UpdateAudioSenders(audio_senders, max_sampling_rate,
+ max_num_channels);
+
+ // Depending on availability of senders, turn on or off ADM recording.
+ if (!audio_senders.empty()) {
+ // Initialize audio device module and default device if needed.
+ if (!InitializeIfNeeded()) {
+ return false;
+ }
+
+ if (!audio_device_module_->Recording()) {
+ if (audio_device_module_->InitRecording() != 0) {
+ RTC_LOG(LS_ERROR) << "InitRecording failed";
+ return false;
+ }
+ if (audio_device_module_->StartRecording() != 0) {
+ RTC_LOG(LS_ERROR) << "StartRecording failed";
+ return false;
+ }
+ }
+ } else {
+ if (audio_device_module_->Recording() &&
+ audio_device_module_->StopRecording() != 0) {
+ RTC_LOG(LS_ERROR) << "StopRecording failed";
+ return false;
+ }
+ }
+ return true;
+}
+
+VoipResult VoipCore::StartSend(ChannelId channel_id) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ if (!channel->StartSend()) {
+ return VoipResult::kFailedPrecondition;
+ }
+
+ return UpdateAudioTransportWithSenders() ? VoipResult::kOk
+ : VoipResult::kInternal;
+}
+
+VoipResult VoipCore::StopSend(ChannelId channel_id) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->StopSend();
+
+ return UpdateAudioTransportWithSenders() ? VoipResult::kOk
+ : VoipResult::kInternal;
+}
+
+VoipResult VoipCore::StartPlayout(ChannelId channel_id) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ if (channel->IsPlaying()) {
+ return VoipResult::kOk;
+ }
+
+ if (!channel->StartPlay()) {
+ return VoipResult::kFailedPrecondition;
+ }
+
+ // Initialize audio device module and default device if needed.
+ if (!InitializeIfNeeded()) {
+ return VoipResult::kInternal;
+ }
+
+ if (!audio_device_module_->Playing()) {
+ if (audio_device_module_->InitPlayout() != 0) {
+ RTC_LOG(LS_ERROR) << "InitPlayout failed";
+ return VoipResult::kInternal;
+ }
+ if (audio_device_module_->StartPlayout() != 0) {
+ RTC_LOG(LS_ERROR) << "StartPlayout failed";
+ return VoipResult::kInternal;
+ }
+ }
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::StopPlayout(ChannelId channel_id) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->StopPlay();
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::ReceivedRTPPacket(
+ ChannelId channel_id,
+ rtc::ArrayView<const uint8_t> rtp_packet) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->ReceivedRTPPacket(rtp_packet);
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::ReceivedRTCPPacket(
+ ChannelId channel_id,
+ rtc::ArrayView<const uint8_t> rtcp_packet) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->ReceivedRTCPPacket(rtcp_packet);
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::SetSendCodec(ChannelId channel_id,
+ int payload_type,
+ const SdpAudioFormat& encoder_format) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ auto encoder = encoder_factory_->MakeAudioEncoder(
+ payload_type, encoder_format, absl::nullopt);
+ channel->SetEncoder(payload_type, encoder_format, std::move(encoder));
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::SetReceiveCodecs(
+ ChannelId channel_id,
+ const std::map<int, SdpAudioFormat>& decoder_specs) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->SetReceiveCodecs(decoder_specs);
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::RegisterTelephoneEventType(ChannelId channel_id,
+ int rtp_payload_type,
+ int sample_rate_hz) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->RegisterTelephoneEventType(rtp_payload_type, sample_rate_hz);
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::SendDtmfEvent(ChannelId channel_id,
+ DtmfEvent dtmf_event,
+ int duration_ms) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ return (channel->SendTelephoneEvent(static_cast<int>(dtmf_event), duration_ms)
+ ? VoipResult::kOk
+ : VoipResult::kFailedPrecondition);
+}
+
+VoipResult VoipCore::GetIngressStatistics(ChannelId channel_id,
+ IngressStatistics& ingress_stats) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ ingress_stats = channel->GetIngressStatistics();
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::GetChannelStatistics(ChannelId channel_id,
+ ChannelStatistics& channel_stats) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel_stats = channel->GetChannelStatistics();
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::SetInputMuted(ChannelId channel_id, bool enable) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ channel->SetMute(enable);
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::GetInputVolumeInfo(ChannelId channel_id,
+ VolumeInfo& input_volume) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ input_volume.audio_level = channel->GetInputAudioLevel();
+ input_volume.total_energy = channel->GetInputTotalEnergy();
+ input_volume.total_duration = channel->GetInputTotalDuration();
+
+ return VoipResult::kOk;
+}
+
+VoipResult VoipCore::GetOutputVolumeInfo(ChannelId channel_id,
+ VolumeInfo& output_volume) {
+ rtc::scoped_refptr<AudioChannel> channel = GetChannel(channel_id);
+
+ if (!channel) {
+ return VoipResult::kInvalidArgument;
+ }
+
+ output_volume.audio_level = channel->GetOutputAudioLevel();
+ output_volume.total_energy = channel->GetOutputTotalEnergy();
+ output_volume.total_duration = channel->GetOutputTotalDuration();
+
+ return VoipResult::kOk;
+}
+
+} // namespace webrtc
diff --git a/third_party/libwebrtc/audio/voip/voip_core.h b/third_party/libwebrtc/audio/voip/voip_core.h
new file mode 100644
index 0000000000..6c3aec6fa2
--- /dev/null
+++ b/third_party/libwebrtc/audio/voip/voip_core.h
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef AUDIO_VOIP_VOIP_CORE_H_
+#define AUDIO_VOIP_VOIP_CORE_H_
+
+#include <map>
+#include <memory>
+#include <queue>
+#include <unordered_map>
+#include <vector>
+
+#include "api/audio_codecs/audio_decoder_factory.h"
+#include "api/audio_codecs/audio_encoder_factory.h"
+#include "api/scoped_refptr.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "api/voip/voip_base.h"
+#include "api/voip/voip_codec.h"
+#include "api/voip/voip_dtmf.h"
+#include "api/voip/voip_engine.h"
+#include "api/voip/voip_network.h"
+#include "api/voip/voip_statistics.h"
+#include "api/voip/voip_volume_control.h"
+#include "audio/audio_transport_impl.h"
+#include "audio/voip/audio_channel.h"
+#include "modules/audio_device/include/audio_device.h"
+#include "modules/audio_mixer/audio_mixer_impl.h"
+#include "modules/audio_processing/include/audio_processing.h"
+#include "rtc_base/synchronization/mutex.h"
+
+namespace webrtc {
+
+// VoipCore is the implementatino of VoIP APIs listed in api/voip directory.
+// It manages a vector of AudioChannel objects where each is mapped with a
+// ChannelId (int) type. ChannelId is the primary key to locate a specific
+// AudioChannel object to operate requested VoIP API from the caller.
+//
+// This class receives required audio components from caller at construction and
+// owns the life cycle of them to orchestrate the proper destruction sequence.
+class VoipCore : public VoipEngine,
+ public VoipBase,
+ public VoipNetwork,
+ public VoipCodec,
+ public VoipDtmf,
+ public VoipStatistics,
+ public VoipVolumeControl {
+ public:
+ // Construct VoipCore with provided arguments.
+ VoipCore(rtc::scoped_refptr<AudioEncoderFactory> encoder_factory,
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory,
+ std::unique_ptr<TaskQueueFactory> task_queue_factory,
+ rtc::scoped_refptr<AudioDeviceModule> audio_device_module,
+ rtc::scoped_refptr<AudioProcessing> audio_processing);
+ ~VoipCore() override = default;
+
+ // Implements VoipEngine interfaces.
+ VoipBase& Base() override { return *this; }
+ VoipNetwork& Network() override { return *this; }
+ VoipCodec& Codec() override { return *this; }
+ VoipDtmf& Dtmf() override { return *this; }
+ VoipStatistics& Statistics() override { return *this; }
+ VoipVolumeControl& VolumeControl() override { return *this; }
+
+ // Implements VoipBase interfaces.
+ ChannelId CreateChannel(Transport* transport,
+ absl::optional<uint32_t> local_ssrc) override;
+ VoipResult ReleaseChannel(ChannelId channel_id) override;
+ VoipResult StartSend(ChannelId channel_id) override;
+ VoipResult StopSend(ChannelId channel_id) override;
+ VoipResult StartPlayout(ChannelId channel_id) override;
+ VoipResult StopPlayout(ChannelId channel_id) override;
+
+ // Implements VoipNetwork interfaces.
+ VoipResult ReceivedRTPPacket(
+ ChannelId channel_id,
+ rtc::ArrayView<const uint8_t> rtp_packet) override;
+ VoipResult ReceivedRTCPPacket(
+ ChannelId channel_id,
+ rtc::ArrayView<const uint8_t> rtcp_packet) override;
+
+ // Implements VoipCodec interfaces.
+ VoipResult SetSendCodec(ChannelId channel_id,
+ int payload_type,
+ const SdpAudioFormat& encoder_format) override;
+ VoipResult SetReceiveCodecs(
+ ChannelId channel_id,
+ const std::map<int, SdpAudioFormat>& decoder_specs) override;
+
+ // Implements VoipDtmf interfaces.
+ VoipResult RegisterTelephoneEventType(ChannelId channel_id,
+ int rtp_payload_type,
+ int sample_rate_hz) override;
+ VoipResult SendDtmfEvent(ChannelId channel_id,
+ DtmfEvent dtmf_event,
+ int duration_ms) override;
+
+ // Implements VoipStatistics interfaces.
+ VoipResult GetIngressStatistics(ChannelId channel_id,
+ IngressStatistics& ingress_stats) override;
+ VoipResult GetChannelStatistics(ChannelId channe_id,
+ ChannelStatistics& channel_stats) override;
+
+ // Implements VoipVolumeControl interfaces.
+ VoipResult SetInputMuted(ChannelId channel_id, bool enable) override;
+ VoipResult GetInputVolumeInfo(ChannelId channel_id,
+ VolumeInfo& volume_info) override;
+ VoipResult GetOutputVolumeInfo(ChannelId channel_id,
+ VolumeInfo& volume_info) override;
+
+ private:
+ // Initialize ADM and default audio device if needed.
+ // Returns true if ADM is successfully initialized or already in such state
+ // (e.g called more than once). Returns false when ADM fails to initialize
+ // which would presumably render further processing useless. Note that such
+ // failure won't necessarily succeed in next initialization attempt as it
+ // would mean changing the ADM implementation. From Android N and onwards, the
+ // mobile app may not be able to gain microphone access when in background
+ // mode. Therefore it would be better to delay the logic as late as possible.
+ bool InitializeIfNeeded();
+
+ // Fetches the corresponding AudioChannel assigned with given `channel`.
+ // Returns nullptr if not found.
+ rtc::scoped_refptr<AudioChannel> GetChannel(ChannelId channel_id);
+
+ // Updates AudioTransportImpl with a new set of actively sending AudioSender
+ // (AudioEgress). This needs to be invoked whenever StartSend/StopSend is
+ // involved by caller. Returns false when the selected audio device fails to
+ // initialize where it can't expect to deliver any audio input sample.
+ bool UpdateAudioTransportWithSenders();
+
+ // Synchronization for these are handled internally.
+ rtc::scoped_refptr<AudioEncoderFactory> encoder_factory_;
+ rtc::scoped_refptr<AudioDecoderFactory> decoder_factory_;
+ std::unique_ptr<TaskQueueFactory> task_queue_factory_;
+
+ // Synchronization is handled internally by AudioProcessing.
+ // Must be placed before `audio_device_module_` for proper destruction.
+ rtc::scoped_refptr<AudioProcessing> audio_processing_;
+
+ // Synchronization is handled internally by AudioMixer.
+ // Must be placed before `audio_device_module_` for proper destruction.
+ rtc::scoped_refptr<AudioMixer> audio_mixer_;
+
+ // Synchronization is handled internally by AudioTransportImpl.
+ // Must be placed before `audio_device_module_` for proper destruction.
+ std::unique_ptr<AudioTransportImpl> audio_transport_;
+
+ // Synchronization is handled internally by AudioDeviceModule.
+ rtc::scoped_refptr<AudioDeviceModule> audio_device_module_;
+
+ Mutex lock_;
+
+ // Member to track a next ChannelId for new AudioChannel.
+ int next_channel_id_ RTC_GUARDED_BY(lock_) = 0;
+
+ // Container to track currently active AudioChannel objects mapped by
+ // ChannelId.
+ std::unordered_map<ChannelId, rtc::scoped_refptr<AudioChannel>> channels_
+ RTC_GUARDED_BY(lock_);
+
+ // Boolean flag to ensure initialization only occurs once.
+ bool initialized_ RTC_GUARDED_BY(lock_) = false;
+};
+
+} // namespace webrtc
+
+#endif // AUDIO_VOIP_VOIP_CORE_H_