1 files changed, 208 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/signal_dependent_erle_estimator_unittest.cc b/third_party/libwebrtc/modules/audio_processing/aec3/signal_dependent_erle_estimator_unittest.cc
new file mode 100644
index 0000000000..67927a6c68
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/signal_dependent_erle_estimator_unittest.cc
@@ -0,0 +1,208 @@
+/*
+ *  Copyright (c) 2018 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/signal_dependent_erle_estimator.h"
+
+#include <algorithm>
+#include <iostream>
+#include <string>
+
+#include "api/audio/echo_canceller3_config.h"
+#include "modules/audio_processing/aec3/render_buffer.h"
+#include "modules/audio_processing/aec3/render_delay_buffer.h"
+#include "rtc_base/strings/string_builder.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+
+namespace {
+
+void GetActiveFrame(Block* x) {
+  const std::array<float, kBlockSize> frame = {
+      7459.88, 17209.6, 17383,   20768.9, 16816.7, 18386.3, 4492.83, 9675.85,
+      6665.52, 14808.6, 9342.3,  7483.28, 19261.7, 4145.98, 1622.18, 13475.2,
+      7166.32, 6856.61, 21937,   7263.14, 9569.07, 14919,   8413.32, 7551.89,
+      7848.65, 6011.27, 13080.6, 15865.2, 12656,   17459.6, 4263.93, 4503.03,
+      9311.79, 21095.8, 12657.9, 13906.6, 19267.2, 11338.1, 16828.9, 11501.6,
+      11405,   15031.4, 14541.6, 19765.5, 18346.3, 19350.2, 3157.47, 18095.8,
+      1743.68, 21328.2, 19727.5, 7295.16, 10332.4, 11055.5, 20107.4, 14708.4,
+      12416.2, 16434,   2454.69, 9840.8,  6867.23, 1615.75, 6059.9,  8394.19};
+  for (int band = 0; band < x->NumBands(); ++band) {
+    for (int channel = 0; channel < x->NumChannels(); ++channel) {
+      RTC_DCHECK_GE(kBlockSize, frame.size());
+      std::copy(frame.begin(), frame.end(), x->begin(band, channel));
+    }
+  }
+}
+
+class TestInputs {
+ public:
+  TestInputs(const EchoCanceller3Config& cfg,
+             size_t num_render_channels,
+             size_t num_capture_channels);
+  ~TestInputs();
+  const RenderBuffer& GetRenderBuffer() { return *render_buffer_; }
+  rtc::ArrayView<const float, kFftLengthBy2Plus1> GetX2() { return X2_; }
+  rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> GetY2() const {
+    return Y2_;
+  }
+  rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> GetE2() const {
+    return E2_;
+  }
+  rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>>
+  GetH2() const {
+    return H2_;
+  }
+  const std::vector<bool>& GetConvergedFilters() const {
+    return converged_filters_;
+  }
+  void Update();
+
+ private:
+  void UpdateCurrentPowerSpectra();
+  int n_ = 0;
+  std::unique_ptr<RenderDelayBuffer> render_delay_buffer_;
+  RenderBuffer* render_buffer_;
+  std::array<float, kFftLengthBy2Plus1> X2_;
+  std::vector<std::array<float, kFftLengthBy2Plus1>> Y2_;
+  std::vector<std::array<float, kFftLengthBy2Plus1>> E2_;
+  std::vector<std::vector<std::array<float, kFftLengthBy2Plus1>>> H2_;
+  Block x_;
+  std::vector<bool> converged_filters_;
+};
+
+TestInputs::TestInputs(const EchoCanceller3Config& cfg,
+                       size_t num_render_channels,
+                       size_t num_capture_channels)
+    : render_delay_buffer_(
+          RenderDelayBuffer::Create(cfg, 16000, num_render_channels)),
+      Y2_(num_capture_channels),
+      E2_(num_capture_channels),
+      H2_(num_capture_channels,
+          std::vector<std::array<float, kFftLengthBy2Plus1>>(
+              cfg.filter.refined.length_blocks)),
+      x_(1, num_render_channels),
+      converged_filters_(num_capture_channels, true) {
+  render_delay_buffer_->AlignFromDelay(4);
+  render_buffer_ = render_delay_buffer_->GetRenderBuffer();
+  for (auto& H2_ch : H2_) {
+    for (auto& H2_p : H2_ch) {
+      H2_p.fill(0.f);
+    }
+  }
+  for (auto& H2_p : H2_[0]) {
+    H2_p.fill(1.f);
+  }
+}
+
+TestInputs::~TestInputs() = default;
+
+void TestInputs::Update() {
+  if (n_ % 2 == 0) {
+    std::fill(x_.begin(/*band=*/0, /*channel=*/0),
+              x_.end(/*band=*/0, /*channel=*/0), 0.f);
+  } else {
+    GetActiveFrame(&x_);
+  }
+
+  render_delay_buffer_->Insert(x_);
+  render_delay_buffer_->PrepareCaptureProcessing();
+  UpdateCurrentPowerSpectra();
+  ++n_;
+}
+
+void TestInputs::UpdateCurrentPowerSpectra() {
+  const SpectrumBuffer& spectrum_render_buffer =
+      render_buffer_->GetSpectrumBuffer();
+  size_t idx = render_buffer_->Position();
+  size_t prev_idx = spectrum_render_buffer.OffsetIndex(idx, 1);
+  auto& X2 = spectrum_render_buffer.buffer[idx][/*channel=*/0];
+  auto& X2_prev = spectrum_render_buffer.buffer[prev_idx][/*channel=*/0];
+  std::copy(X2.begin(), X2.end(), X2_.begin());
+  for (size_t ch = 0; ch < Y2_.size(); ++ch) {
+    RTC_DCHECK_EQ(X2.size(), Y2_[ch].size());
+    for (size_t k = 0; k < X2.size(); ++k) {
+      E2_[ch][k] = 0.01f * X2_prev[k];
+      Y2_[ch][k] = X2[k] + E2_[ch][k];
+    }
+  }
+}
+
+}  // namespace
+
+class SignalDependentErleEstimatorMultiChannel
+    : public ::testing::Test,
+      public ::testing::WithParamInterface<std::tuple<size_t, size_t>> {};
+
+INSTANTIATE_TEST_SUITE_P(MultiChannel,
+                         SignalDependentErleEstimatorMultiChannel,
+                         ::testing::Combine(::testing::Values(1, 2, 4),
+                                            ::testing::Values(1, 2, 4)));
+
+TEST_P(SignalDependentErleEstimatorMultiChannel, SweepSettings) {
+  const size_t num_render_channels = std::get<0>(GetParam());
+  const size_t num_capture_channels = std::get<1>(GetParam());
+  EchoCanceller3Config cfg;
+  size_t max_length_blocks = 50;
+  for (size_t blocks = 1; blocks < max_length_blocks; blocks = blocks + 10) {
+    for (size_t delay_headroom = 0; delay_headroom < 5; ++delay_headroom) {
+      for (size_t num_sections = 2; num_sections < max_length_blocks;
+           ++num_sections) {
+        cfg.filter.refined.length_blocks = blocks;
+        cfg.filter.refined_initial.length_blocks =
+            std::min(cfg.filter.refined_initial.length_blocks, blocks);
+        cfg.delay.delay_headroom_samples = delay_headroom * kBlockSize;
+        cfg.erle.num_sections = num_sections;
+        if (EchoCanceller3Config::Validate(&cfg)) {
+          SignalDependentErleEstimator s(cfg, num_capture_channels);
+          std::vector<std::array<float, kFftLengthBy2Plus1>> average_erle(
+              num_capture_channels);
+          for (auto& e : average_erle) {
+            e.fill(cfg.erle.max_l);
+          }
+          TestInputs inputs(cfg, num_render_channels, num_capture_channels);
+          for (size_t n = 0; n < 10; ++n) {
+            inputs.Update();
+            s.Update(inputs.GetRenderBuffer(), inputs.GetH2(), inputs.GetX2(),
+                     inputs.GetY2(), inputs.GetE2(), average_erle, average_erle,
+                     inputs.GetConvergedFilters());
+          }
+        }
+      }
+    }
+  }
+}
+
+TEST_P(SignalDependentErleEstimatorMultiChannel, LongerRun) {
+  const size_t num_render_channels = std::get<0>(GetParam());
+  const size_t num_capture_channels = std::get<1>(GetParam());
+  EchoCanceller3Config cfg;
+  cfg.filter.refined.length_blocks = 2;
+  cfg.filter.refined_initial.length_blocks = 1;
+  cfg.delay.delay_headroom_samples = 0;
+  cfg.delay.hysteresis_limit_blocks = 0;
+  cfg.erle.num_sections = 2;
+  EXPECT_EQ(EchoCanceller3Config::Validate(&cfg), true);
+  std::vector<std::array<float, kFftLengthBy2Plus1>> average_erle(
+      num_capture_channels);
+  for (auto& e : average_erle) {
+    e.fill(cfg.erle.max_l);
+  }
+  SignalDependentErleEstimator s(cfg, num_capture_channels);
+  TestInputs inputs(cfg, num_render_channels, num_capture_channels);
+  for (size_t n = 0; n < 200; ++n) {
+    inputs.Update();
+    s.Update(inputs.GetRenderBuffer(), inputs.GetH2(), inputs.GetX2(),
+             inputs.GetY2(), inputs.GetE2(), average_erle, average_erle,
+             inputs.GetConvergedFilters());
+  }
+}
+
+}  // namespace webrtc