1 files changed, 210 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/echo_remover_unittest.cc b/third_party/libwebrtc/modules/audio_processing/aec3/echo_remover_unittest.cc
new file mode 100644
index 0000000000..66168ab08d
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/echo_remover_unittest.cc
@@ -0,0 +1,210 @@
+/*
+ *  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_processing/aec3/echo_remover.h"
+
+#include <algorithm>
+#include <memory>
+#include <numeric>
+#include <string>
+
+#include "modules/audio_processing/aec3/aec3_common.h"
+#include "modules/audio_processing/aec3/render_buffer.h"
+#include "modules/audio_processing/aec3/render_delay_buffer.h"
+#include "modules/audio_processing/logging/apm_data_dumper.h"
+#include "modules/audio_processing/test/echo_canceller_test_tools.h"
+#include "rtc_base/random.h"
+#include "rtc_base/strings/string_builder.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+std::string ProduceDebugText(int sample_rate_hz) {
+  rtc::StringBuilder ss;
+  ss << "Sample rate: " << sample_rate_hz;
+  return ss.Release();
+}
+
+std::string ProduceDebugText(int sample_rate_hz, int delay) {
+  rtc::StringBuilder ss(ProduceDebugText(sample_rate_hz));
+  ss << ", Delay: " << delay;
+  return ss.Release();
+}
+
+}  // namespace
+
+class EchoRemoverMultiChannel
+    : public ::testing::Test,
+      public ::testing::WithParamInterface<std::tuple<size_t, size_t>> {};
+
+INSTANTIATE_TEST_SUITE_P(MultiChannel,
+                         EchoRemoverMultiChannel,
+                         ::testing::Combine(::testing::Values(1, 2, 8),
+                                            ::testing::Values(1, 2, 8)));
+
+// Verifies the basic API call sequence
+TEST_P(EchoRemoverMultiChannel, BasicApiCalls) {
+  const size_t num_render_channels = std::get<0>(GetParam());
+  const size_t num_capture_channels = std::get<1>(GetParam());
+  absl::optional<DelayEstimate> delay_estimate;
+  for (auto rate : {16000, 32000, 48000}) {
+    SCOPED_TRACE(ProduceDebugText(rate));
+    std::unique_ptr<EchoRemover> remover(
+        EchoRemover::Create(EchoCanceller3Config(), rate, num_render_channels,
+                            num_capture_channels));
+    std::unique_ptr<RenderDelayBuffer> render_buffer(RenderDelayBuffer::Create(
+        EchoCanceller3Config(), rate, num_render_channels));
+
+    Block render(NumBandsForRate(rate), num_render_channels);
+    Block capture(NumBandsForRate(rate), num_capture_channels);
+    for (size_t k = 0; k < 100; ++k) {
+      EchoPathVariability echo_path_variability(
+          k % 3 == 0 ? true : false,
+          k % 5 == 0 ? EchoPathVariability::DelayAdjustment::kNewDetectedDelay
+                     : EchoPathVariability::DelayAdjustment::kNone,
+          false);
+      render_buffer->Insert(render);
+      render_buffer->PrepareCaptureProcessing();
+
+      remover->ProcessCapture(echo_path_variability, k % 2 == 0 ? true : false,
+                              delay_estimate, render_buffer->GetRenderBuffer(),
+                              nullptr, &capture);
+    }
+  }
+}
+
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+
+// Verifies the check for the samplerate.
+// TODO(peah): Re-enable the test once the issue with memory leaks during DEATH
+// tests on test bots has been fixed.
+TEST(EchoRemoverDeathTest, DISABLED_WrongSampleRate) {
+  EXPECT_DEATH(std::unique_ptr<EchoRemover>(
+                   EchoRemover::Create(EchoCanceller3Config(), 8001, 1, 1)),
+               "");
+}
+
+// Verifies the check for the number of capture bands.
+// TODO(peah): Re-enable the test once the issue with memory leaks during DEATH
+// tests on test bots has been fixed.c
+TEST(EchoRemoverDeathTest, DISABLED_WrongCaptureNumBands) {
+  absl::optional<DelayEstimate> delay_estimate;
+  for (auto rate : {16000, 32000, 48000}) {
+    SCOPED_TRACE(ProduceDebugText(rate));
+    std::unique_ptr<EchoRemover> remover(
+        EchoRemover::Create(EchoCanceller3Config(), rate, 1, 1));
+    std::unique_ptr<RenderDelayBuffer> render_buffer(
+        RenderDelayBuffer::Create(EchoCanceller3Config(), rate, 1));
+    Block capture(NumBandsForRate(rate == 48000 ? 16000 : rate + 16000), 1);
+    EchoPathVariability echo_path_variability(
+        false, EchoPathVariability::DelayAdjustment::kNone, false);
+    EXPECT_DEATH(remover->ProcessCapture(
+                     echo_path_variability, false, delay_estimate,
+                     render_buffer->GetRenderBuffer(), nullptr, &capture),
+                 "");
+  }
+}
+
+// Verifies the check for non-null capture block.
+TEST(EchoRemoverDeathTest, NullCapture) {
+  absl::optional<DelayEstimate> delay_estimate;
+  std::unique_ptr<EchoRemover> remover(
+      EchoRemover::Create(EchoCanceller3Config(), 16000, 1, 1));
+  std::unique_ptr<RenderDelayBuffer> render_buffer(
+      RenderDelayBuffer::Create(EchoCanceller3Config(), 16000, 1));
+  EchoPathVariability echo_path_variability(
+      false, EchoPathVariability::DelayAdjustment::kNone, false);
+  EXPECT_DEATH(remover->ProcessCapture(
+                   echo_path_variability, false, delay_estimate,
+                   render_buffer->GetRenderBuffer(), nullptr, nullptr),
+               "");
+}
+
+#endif
+
+// Performs a sanity check that the echo_remover is able to properly
+// remove echoes.
+TEST(EchoRemover, BasicEchoRemoval) {
+  constexpr int kNumBlocksToProcess = 500;
+  Random random_generator(42U);
+  absl::optional<DelayEstimate> delay_estimate;
+  for (size_t num_channels : {1, 2, 4}) {
+    for (auto rate : {16000, 32000, 48000}) {
+      Block x(NumBandsForRate(rate), num_channels);
+      Block y(NumBandsForRate(rate), num_channels);
+      EchoPathVariability echo_path_variability(
+          false, EchoPathVariability::DelayAdjustment::kNone, false);
+      for (size_t delay_samples : {0, 64, 150, 200, 301}) {
+        SCOPED_TRACE(ProduceDebugText(rate, delay_samples));
+        EchoCanceller3Config config;
+        std::unique_ptr<EchoRemover> remover(
+            EchoRemover::Create(config, rate, num_channels, num_channels));
+        std::unique_ptr<RenderDelayBuffer> render_buffer(
+            RenderDelayBuffer::Create(config, rate, num_channels));
+        render_buffer->AlignFromDelay(delay_samples / kBlockSize);
+
+        std::vector<std::vector<std::unique_ptr<DelayBuffer<float>>>>
+            delay_buffers(x.NumBands());
+        for (size_t band = 0; band < delay_buffers.size(); ++band) {
+          delay_buffers[band].resize(x.NumChannels());
+        }
+
+        for (int band = 0; band < x.NumBands(); ++band) {
+          for (int channel = 0; channel < x.NumChannels(); ++channel) {
+            delay_buffers[band][channel].reset(
+                new DelayBuffer<float>(delay_samples));
+          }
+        }
+
+        float input_energy = 0.f;
+        float output_energy = 0.f;
+        for (int k = 0; k < kNumBlocksToProcess; ++k) {
+          const bool silence = k < 100 || (k % 100 >= 10);
+
+          for (int band = 0; band < x.NumBands(); ++band) {
+            for (int channel = 0; channel < x.NumChannels(); ++channel) {
+              if (silence) {
+                std::fill(x.begin(band, channel), x.end(band, channel), 0.f);
+              } else {
+                RandomizeSampleVector(&random_generator, x.View(band, channel));
+              }
+              delay_buffers[band][channel]->Delay(x.View(band, channel),
+                                                  y.View(band, channel));
+            }
+          }
+
+          if (k > kNumBlocksToProcess / 2) {
+            input_energy = std::inner_product(
+                y.begin(/*band=*/0, /*channel=*/0),
+                y.end(/*band=*/0, /*channel=*/0),
+                y.begin(/*band=*/0, /*channel=*/0), input_energy);
+          }
+
+          render_buffer->Insert(x);
+          render_buffer->PrepareCaptureProcessing();
+
+          remover->ProcessCapture(echo_path_variability, false, delay_estimate,
+                                  render_buffer->GetRenderBuffer(), nullptr,
+                                  &y);
+
+          if (k > kNumBlocksToProcess / 2) {
+            output_energy = std::inner_product(
+                y.begin(/*band=*/0, /*channel=*/0),
+                y.end(/*band=*/0, /*channel=*/0),
+                y.begin(/*band=*/0, /*channel=*/0), output_energy);
+          }
+        }
+        EXPECT_GT(input_energy, 10.f * output_energy);
+      }
+    }
+  }
+}
+
+}  // namespace webrtc