Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 528 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/audio_device/include/test_audio_device_unittest.cc b/third_party/libwebrtc/modules/audio_device/include/test_audio_device_unittest.cc
new file mode 100644
index 0000000000..7a122ca84b
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_device/include/test_audio_device_unittest.cc
@@ -0,0 +1,528 @@
+/*
+ *  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 "modules/audio_device/include/test_audio_device.h"
+
+#include <algorithm>
+#include <array>
+#include <memory>
+#include <utility>
+
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+#include "common_audio/wav_file.h"
+#include "common_audio/wav_header.h"
+#include "modules/audio_device/include/audio_device_defines.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/testsupport/file_utils.h"
+#include "test/time_controller/simulated_time_controller.h"
+
+namespace webrtc {
+namespace {
+
+void RunWavTest(const std::vector<int16_t>& input_samples,
+                const std::vector<int16_t>& expected_samples) {
+  const ::testing::TestInfo* const test_info =
+      ::testing::UnitTest::GetInstance()->current_test_info();
+
+  const std::string output_filename =
+      test::OutputPath() + "BoundedWavFileWriterTest_" + test_info->name() +
+      "_" + std::to_string(std::rand()) + ".wav";
+
+  static const size_t kSamplesPerFrame = 8;
+  static const int kSampleRate = kSamplesPerFrame * 100;
+  EXPECT_EQ(TestAudioDeviceModule::SamplesPerFrame(kSampleRate),
+            kSamplesPerFrame);
+
+  // Test through file name API.
+  {
+    std::unique_ptr<TestAudioDeviceModule::Renderer> writer =
+        TestAudioDeviceModule::CreateBoundedWavFileWriter(output_filename, 800);
+
+    for (size_t i = 0; i < input_samples.size(); i += kSamplesPerFrame) {
+      EXPECT_TRUE(writer->Render(rtc::ArrayView<const int16_t>(
+          &input_samples[i],
+          std::min(kSamplesPerFrame, input_samples.size() - i))));
+    }
+  }
+
+  {
+    WavReader reader(output_filename);
+    std::vector<int16_t> read_samples(expected_samples.size());
+    EXPECT_EQ(expected_samples.size(),
+              reader.ReadSamples(read_samples.size(), read_samples.data()));
+    EXPECT_EQ(expected_samples, read_samples);
+
+    EXPECT_EQ(0u, reader.ReadSamples(read_samples.size(), read_samples.data()));
+  }
+
+  remove(output_filename.c_str());
+}
+
+TEST(BoundedWavFileWriterTest, NoSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      75,   1234,  243,    -1231, -22222, 0,    3,      88,
+      1222, -1213, -13222, -7,    -3525,  5787, -25247, 8};
+  static const std::vector<int16_t> kExpectedSamples = kInputSamples;
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(BoundedWavFileWriterTest, SomeStartSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      0, 0, 0, 0, 3, 0, 0, 0, 0, 3, -13222, -7, -3525, 5787, -25247, 8};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin() + 10,
+                                                     kInputSamples.end());
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(BoundedWavFileWriterTest, NegativeStartSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      0, -4, -6, 0, 3, 0, 0, 0, 0, 3, -13222, -7, -3525, 5787, -25247, 8};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin() + 2,
+                                                     kInputSamples.end());
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(BoundedWavFileWriterTest, SomeEndSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      75, 1234, 243, -1231, -22222, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin(),
+                                                     kInputSamples.end() - 9);
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(BoundedWavFileWriterTest, DoubleEndSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      75, 1234,  243,    -1231, -22222, 0,    0, 0,
+      0,  -1213, -13222, -7,    -3525,  5787, 0, 0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin(),
+                                                     kInputSamples.end() - 2);
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(BoundedWavFileWriterTest, DoubleSilence) {
+  static const std::vector<int16_t> kInputSamples = {0,     -1213, -13222, -7,
+                                                     -3525, 5787,  0,      0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin() + 1,
+                                                     kInputSamples.end() - 2);
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(BoundedWavFileWriterTest, EndSilenceCutoff) {
+  static const std::vector<int16_t> kInputSamples = {
+      75, 1234, 243, -1231, -22222, 0, 1, 0, 0, 0, 0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin(),
+                                                     kInputSamples.end() - 4);
+  RunWavTest(kInputSamples, kExpectedSamples);
+}
+
+TEST(WavFileReaderTest, RepeatedTrueWithSingleFrameFileReadTwice) {
+  static const std::vector<int16_t> kInputSamples = {75,     1234, 243, -1231,
+                                                     -22222, 0,    3,   88};
+  static const rtc::BufferT<int16_t> kExpectedSamples(kInputSamples.data(),
+                                                      kInputSamples.size());
+
+  const std::string output_filename = test::OutputPath() +
+                                      "WavFileReaderTest_RepeatedTrue_" +
+                                      std::to_string(std::rand()) + ".wav";
+
+  static const size_t kSamplesPerFrame = 8;
+  static const int kSampleRate = kSamplesPerFrame * 100;
+  EXPECT_EQ(TestAudioDeviceModule::SamplesPerFrame(kSampleRate),
+            kSamplesPerFrame);
+
+  // Create raw file to read.
+  {
+    std::unique_ptr<TestAudioDeviceModule::Renderer> writer =
+        TestAudioDeviceModule::CreateWavFileWriter(output_filename, 800);
+
+    for (size_t i = 0; i < kInputSamples.size(); i += kSamplesPerFrame) {
+      EXPECT_TRUE(writer->Render(rtc::ArrayView<const int16_t>(
+          &kInputSamples[i],
+          std::min(kSamplesPerFrame, kInputSamples.size() - i))));
+    }
+  }
+
+  {
+    std::unique_ptr<TestAudioDeviceModule::Capturer> reader =
+        TestAudioDeviceModule::CreateWavFileReader(output_filename, true);
+    rtc::BufferT<int16_t> buffer(kExpectedSamples.size());
+    EXPECT_TRUE(reader->Capture(&buffer));
+    EXPECT_EQ(kExpectedSamples, buffer);
+    EXPECT_TRUE(reader->Capture(&buffer));
+    EXPECT_EQ(kExpectedSamples, buffer);
+  }
+
+  remove(output_filename.c_str());
+}
+
+void RunRawTestNoRepeat(const std::vector<int16_t>& input_samples,
+                        const std::vector<int16_t>& expected_samples) {
+  const ::testing::TestInfo* const test_info =
+      ::testing::UnitTest::GetInstance()->current_test_info();
+
+  const std::string output_filename = test::OutputPath() + "RawFileTest_" +
+                                      test_info->name() + "_" +
+                                      std::to_string(std::rand()) + ".raw";
+
+  static const size_t kSamplesPerFrame = 8;
+  static const int kSampleRate = kSamplesPerFrame * 100;
+  EXPECT_EQ(TestAudioDeviceModule::SamplesPerFrame(kSampleRate),
+            kSamplesPerFrame);
+
+  // Test through file name API.
+  {
+    std::unique_ptr<TestAudioDeviceModule::Renderer> writer =
+        TestAudioDeviceModule::CreateRawFileWriter(
+            output_filename, /*sampling_frequency_in_hz=*/800);
+
+    for (size_t i = 0; i < input_samples.size(); i += kSamplesPerFrame) {
+      EXPECT_TRUE(writer->Render(rtc::ArrayView<const int16_t>(
+          &input_samples[i],
+          std::min(kSamplesPerFrame, input_samples.size() - i))));
+    }
+  }
+
+  {
+    std::unique_ptr<TestAudioDeviceModule::Capturer> reader =
+        TestAudioDeviceModule::CreateRawFileReader(
+            output_filename, /*sampling_frequency_in_hz=*/800,
+            /*num_channels=*/2, /*repeat=*/false);
+    rtc::BufferT<int16_t> buffer(expected_samples.size());
+    rtc::BufferT<int16_t> expected_buffer(expected_samples.size());
+    expected_buffer.SetData(expected_samples);
+    EXPECT_TRUE(reader->Capture(&buffer));
+    EXPECT_EQ(expected_buffer, buffer);
+    EXPECT_FALSE(reader->Capture(&buffer));
+    EXPECT_TRUE(buffer.empty());
+  }
+
+  remove(output_filename.c_str());
+}
+
+TEST(RawFileWriterTest, NoSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      75,   1234,  243,    -1231, -22222, 0,    3,      88,
+      1222, -1213, -13222, -7,    -3525,  5787, -25247, 8};
+  static const std::vector<int16_t> kExpectedSamples = kInputSamples;
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, SomeStartSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      0, 0, 0, 0, 3, 0, 0, 0, 0, 3, -13222, -7, -3525, 5787, -25247, 8};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin() + 10,
+                                                     kInputSamples.end());
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, NegativeStartSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      0, -4, -6, 0, 3, 0, 0, 0, 0, 3, -13222, -7, -3525, 5787, -25247, 8};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin() + 2,
+                                                     kInputSamples.end());
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, SomeEndSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      75, 1234, 243, -1231, -22222, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin(),
+                                                     kInputSamples.end() - 9);
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, DoubleEndSilence) {
+  static const std::vector<int16_t> kInputSamples = {
+      75, 1234,  243,    -1231, -22222, 0,    0, 0,
+      0,  -1213, -13222, -7,    -3525,  5787, 0, 0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin(),
+                                                     kInputSamples.end() - 2);
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, DoubleSilence) {
+  static const std::vector<int16_t> kInputSamples = {0,     -1213, -13222, -7,
+                                                     -3525, 5787,  0,      0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin() + 1,
+                                                     kInputSamples.end() - 2);
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, EndSilenceCutoff) {
+  static const std::vector<int16_t> kInputSamples = {
+      75, 1234, 243, -1231, -22222, 0, 1, 0, 0, 0, 0};
+  static const std::vector<int16_t> kExpectedSamples(kInputSamples.begin(),
+                                                     kInputSamples.end() - 4);
+  RunRawTestNoRepeat(kInputSamples, kExpectedSamples);
+}
+
+TEST(RawFileWriterTest, Repeat) {
+  static const std::vector<int16_t> kInputSamples = {
+      75,   1234,  243,    -1231, -22222, 0,    3,      88,
+      1222, -1213, -13222, -7,    -3525,  5787, -25247, 8};
+  static const rtc::BufferT<int16_t> kExpectedSamples(kInputSamples.data(),
+                                                      kInputSamples.size());
+
+  const ::testing::TestInfo* const test_info =
+      ::testing::UnitTest::GetInstance()->current_test_info();
+
+  const std::string output_filename = test::OutputPath() + "RawFileTest_" +
+                                      test_info->name() + "_" +
+                                      std::to_string(std::rand()) + ".raw";
+
+  static const size_t kSamplesPerFrame = 8;
+  static const int kSampleRate = kSamplesPerFrame * 100;
+  EXPECT_EQ(TestAudioDeviceModule::SamplesPerFrame(kSampleRate),
+            kSamplesPerFrame);
+
+  // Test through file name API.
+  {
+    std::unique_ptr<TestAudioDeviceModule::Renderer> writer =
+        TestAudioDeviceModule::CreateRawFileWriter(
+            output_filename, /*sampling_frequency_in_hz=*/800);
+
+    for (size_t i = 0; i < kInputSamples.size(); i += kSamplesPerFrame) {
+      EXPECT_TRUE(writer->Render(rtc::ArrayView<const int16_t>(
+          &kInputSamples[i],
+          std::min(kSamplesPerFrame, kInputSamples.size() - i))));
+    }
+  }
+
+  {
+    std::unique_ptr<TestAudioDeviceModule::Capturer> reader =
+        TestAudioDeviceModule::CreateRawFileReader(
+            output_filename, /*sampling_frequency_in_hz=*/800,
+            /*num_channels=*/2, /*repeat=*/true);
+    rtc::BufferT<int16_t> buffer(kExpectedSamples.size());
+    EXPECT_TRUE(reader->Capture(&buffer));
+    EXPECT_EQ(kExpectedSamples, buffer);
+    EXPECT_TRUE(reader->Capture(&buffer));
+    EXPECT_EQ(kExpectedSamples, buffer);
+  }
+
+  remove(output_filename.c_str());
+}
+
+TEST(PulsedNoiseCapturerTest, SetMaxAmplitude) {
+  const int16_t kAmplitude = 50;
+  std::unique_ptr<TestAudioDeviceModule::PulsedNoiseCapturer> capturer =
+      TestAudioDeviceModule::CreatePulsedNoiseCapturer(
+          kAmplitude, /*sampling_frequency_in_hz=*/8000);
+  rtc::BufferT<int16_t> recording_buffer;
+
+  // Verify that the capturer doesn't create entries louder than than
+  // kAmplitude. Since the pulse generator alternates between writing
+  // zeroes and actual entries, we need to do the capturing twice.
+  capturer->Capture(&recording_buffer);
+  capturer->Capture(&recording_buffer);
+  int16_t max_sample =
+      *std::max_element(recording_buffer.begin(), recording_buffer.end());
+  EXPECT_LE(max_sample, kAmplitude);
+
+  // Increase the amplitude and verify that the samples can now be louder
+  // than the previous max.
+  capturer->SetMaxAmplitude(kAmplitude * 2);
+  capturer->Capture(&recording_buffer);
+  capturer->Capture(&recording_buffer);
+  max_sample =
+      *std::max_element(recording_buffer.begin(), recording_buffer.end());
+  EXPECT_GT(max_sample, kAmplitude);
+}
+
+using ::testing::ElementsAre;
+
+constexpr Timestamp kStartTime = Timestamp::Millis(10000);
+
+class TestAudioTransport : public AudioTransport {
+ public:
+  enum class Mode { kPlaying, kRecording };
+
+  explicit TestAudioTransport(Mode mode) : mode_(mode) {}
+  ~TestAudioTransport() override = default;
+
+  int32_t RecordedDataIsAvailable(
+      const void* audioSamples,
+      size_t samples_per_channel,
+      size_t bytes_per_sample,
+      size_t number_of_channels,
+      uint32_t samples_per_second,
+      uint32_t total_delay_ms,
+      int32_t clock_drift,
+      uint32_t current_mic_level,
+      bool key_pressed,
+      uint32_t& new_mic_level,
+      absl::optional<int64_t> estimated_capture_time_ns) override {
+    new_mic_level = 1;
+
+    if (mode_ != Mode::kRecording) {
+      EXPECT_TRUE(false)
+          << "NeedMorePlayData mustn't be called when mode isn't kRecording";
+      return -1;
+    }
+
+    MutexLock lock(&mutex_);
+    samples_per_channel_.push_back(samples_per_channel);
+    number_of_channels_.push_back(number_of_channels);
+    bytes_per_sample_.push_back(bytes_per_sample);
+    samples_per_second_.push_back(samples_per_second);
+    return 0;
+  }
+
+  int32_t NeedMorePlayData(size_t samples_per_channel,
+                           size_t bytes_per_sample,
+                           size_t number_of_channels,
+                           uint32_t samples_per_second,
+                           void* audio_samples,
+                           size_t& samples_out,
+                           int64_t* elapsed_time_ms,
+                           int64_t* ntp_time_ms) override {
+    const size_t num_bytes = samples_per_channel * number_of_channels;
+    std::memset(audio_samples, 1, num_bytes);
+    samples_out = samples_per_channel * number_of_channels;
+    *elapsed_time_ms = 0;
+    *ntp_time_ms = 0;
+
+    if (mode_ != Mode::kPlaying) {
+      EXPECT_TRUE(false)
+          << "NeedMorePlayData mustn't be called when mode isn't kPlaying";
+      return -1;
+    }
+
+    MutexLock lock(&mutex_);
+    samples_per_channel_.push_back(samples_per_channel);
+    number_of_channels_.push_back(number_of_channels);
+    bytes_per_sample_.push_back(bytes_per_sample);
+    samples_per_second_.push_back(samples_per_second);
+    return 0;
+  }
+
+  int32_t RecordedDataIsAvailable(const void* audio_samples,
+                                  size_t samples_per_channel,
+                                  size_t bytes_per_sample,
+                                  size_t number_of_channels,
+                                  uint32_t samples_per_second,
+                                  uint32_t total_delay_ms,
+                                  int32_t clockDrift,
+                                  uint32_t current_mic_level,
+                                  bool key_pressed,
+                                  uint32_t& new_mic_level) override {
+    RTC_CHECK(false) << "This methods should be never executed";
+  }
+
+  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 {
+    RTC_CHECK(false) << "This methods should be never executed";
+  }
+
+  std::vector<size_t> samples_per_channel() const {
+    MutexLock lock(&mutex_);
+    return samples_per_channel_;
+  }
+  std::vector<size_t> number_of_channels() const {
+    MutexLock lock(&mutex_);
+    return number_of_channels_;
+  }
+  std::vector<size_t> bytes_per_sample() const {
+    MutexLock lock(&mutex_);
+    return bytes_per_sample_;
+  }
+  std::vector<size_t> samples_per_second() const {
+    MutexLock lock(&mutex_);
+    return samples_per_second_;
+  }
+
+ private:
+  const Mode mode_;
+
+  mutable Mutex mutex_;
+  std::vector<size_t> samples_per_channel_ RTC_GUARDED_BY(mutex_);
+  std::vector<size_t> number_of_channels_ RTC_GUARDED_BY(mutex_);
+  std::vector<size_t> bytes_per_sample_ RTC_GUARDED_BY(mutex_);
+  std::vector<size_t> samples_per_second_ RTC_GUARDED_BY(mutex_);
+};
+
+TEST(TestAudioDeviceModuleTest, CreatedADMCanRecord) {
+  GlobalSimulatedTimeController time_controller(kStartTime);
+  TestAudioTransport audio_transport(TestAudioTransport::Mode::kRecording);
+  std::unique_ptr<TestAudioDeviceModule::PulsedNoiseCapturer> capturer =
+      TestAudioDeviceModule::CreatePulsedNoiseCapturer(
+          /*max_amplitude=*/1000,
+          /*sampling_frequency_in_hz=*/48000, /*num_channels=*/2);
+
+  rtc::scoped_refptr<AudioDeviceModule> adm = TestAudioDeviceModule::Create(
+      time_controller.GetTaskQueueFactory(), std::move(capturer),
+      /*renderer=*/nullptr);
+
+  ASSERT_EQ(adm->RegisterAudioCallback(&audio_transport), 0);
+  ASSERT_EQ(adm->Init(), 0);
+
+  EXPECT_FALSE(adm->RecordingIsInitialized());
+  ASSERT_EQ(adm->InitRecording(), 0);
+  EXPECT_TRUE(adm->RecordingIsInitialized());
+  ASSERT_EQ(adm->StartRecording(), 0);
+  time_controller.AdvanceTime(TimeDelta::Millis(10));
+  ASSERT_TRUE(adm->Recording());
+  time_controller.AdvanceTime(TimeDelta::Millis(10));
+  ASSERT_EQ(adm->StopRecording(), 0);
+
+  EXPECT_THAT(audio_transport.samples_per_channel(),
+              ElementsAre(480, 480, 480));
+  EXPECT_THAT(audio_transport.number_of_channels(), ElementsAre(2, 2, 2));
+  EXPECT_THAT(audio_transport.bytes_per_sample(), ElementsAre(4, 4, 4));
+  EXPECT_THAT(audio_transport.samples_per_second(),
+              ElementsAre(48000, 48000, 48000));
+}
+
+TEST(TestAudioDeviceModuleTest, CreatedADMCanPlay) {
+  GlobalSimulatedTimeController time_controller(kStartTime);
+  TestAudioTransport audio_transport(TestAudioTransport::Mode::kPlaying);
+  std::unique_ptr<TestAudioDeviceModule::Renderer> renderer =
+      TestAudioDeviceModule::CreateDiscardRenderer(
+          /*sampling_frequency_in_hz=*/48000, /*num_channels=*/2);
+
+  rtc::scoped_refptr<AudioDeviceModule> adm =
+      TestAudioDeviceModule::Create(time_controller.GetTaskQueueFactory(),
+                                    /*capturer=*/nullptr, std::move(renderer));
+
+  ASSERT_EQ(adm->RegisterAudioCallback(&audio_transport), 0);
+  ASSERT_EQ(adm->Init(), 0);
+
+  EXPECT_FALSE(adm->PlayoutIsInitialized());
+  ASSERT_EQ(adm->InitPlayout(), 0);
+  EXPECT_TRUE(adm->PlayoutIsInitialized());
+  ASSERT_EQ(adm->StartPlayout(), 0);
+  time_controller.AdvanceTime(TimeDelta::Millis(10));
+  ASSERT_TRUE(adm->Playing());
+  time_controller.AdvanceTime(TimeDelta::Millis(10));
+  ASSERT_EQ(adm->StopPlayout(), 0);
+
+  EXPECT_THAT(audio_transport.samples_per_channel(),
+              ElementsAre(480, 480, 480));
+  EXPECT_THAT(audio_transport.number_of_channels(), ElementsAre(2, 2, 2));
+  EXPECT_THAT(audio_transport.bytes_per_sample(), ElementsAre(4, 4, 4));
+  EXPECT_THAT(audio_transport.samples_per_second(),
+              ElementsAre(48000, 48000, 48000));
+}
+
+}  // namespace
+}  // namespace webrtc