Finalization of the first version of EchoCanceller 3

webrtc/modules/audio_processing/aec3/residual_echo_estimator_unittest.cc

Index: webrtc/modules/audio_processing/aec3/residual_echo_estimator_unittest.cc
diff --git a/webrtc/modules/audio_processing/aec3/residual_echo_estimator_unittest.cc b/webrtc/modules/audio_processing/aec3/residual_echo_estimator_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..850ea4bed2179da69dc95131946acaba02f8f0cf
--- /dev/null
+++ b/webrtc/modules/audio_processing/aec3/residual_echo_estimator_unittest.cc
@@ -0,0 +1,87 @@
+/*
+ *  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 "webrtc/modules/audio_processing/aec3/residual_echo_estimator.h"
+
+#include "webrtc/base/random.h"
+#include "webrtc/modules/audio_processing/aec3/aec_state.h"
+#include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
+#include "webrtc/modules/audio_processing/test/echo_canceller_test_tools.h"
+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+
+#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+
+// Verifies that the check for non-null output gains works.
+TEST(ResidualEchoEstimator, NullOutputGains) {
+  AecState aec_state;
+  FftBuffer X_buffer(Aec3Optimization::kNone, 10, std::vector<size_t>(1, 10));
+  std::vector<std::array<float, kFftLengthBy2Plus1>> H2;
+  std::array<float, kFftLengthBy2Plus1> E2_main;
+  std::array<float, kFftLengthBy2Plus1> E2_shadow;
+  std::array<float, kFftLengthBy2Plus1> S2_linear;
+  std::array<float, kFftLengthBy2Plus1> S2_fallback;
+  std::array<float, kFftLengthBy2Plus1> Y2;
+
+  EXPECT_DEATH(ResidualEchoEstimator().Estimate(true, aec_state, X_buffer, H2,
+                                                E2_main, E2_shadow, S2_linear,
+                                                S2_fallback, Y2, nullptr),
+               "");
+}
+
+#endif
+
+TEST(ResidualEchoEstimator, BasicTest) {
+  ResidualEchoEstimator estimator;
+  AecState aec_state;
+  FftBuffer X_buffer(Aec3Optimization::kNone, 10, std::vector<size_t>(1, 10));
+  std::array<float, kFftLengthBy2Plus1> E2_main;
+  std::array<float, kFftLengthBy2Plus1> E2_shadow;
+  std::array<float, kFftLengthBy2Plus1> S2_linear;
+  std::array<float, kFftLengthBy2Plus1> S2_fallback;
+  std::array<float, kFftLengthBy2Plus1> Y2;
+  std::array<float, kFftLengthBy2Plus1> R2;
+  EchoPathVariability echo_path_variability(false, false);
+  std::array<float, kBlockSize> x;
+  std::vector<std::array<float, kFftLengthBy2Plus1>> H2(10);
+  Random random_generator(42U);
+  FftData X;
+  std::array<float, kBlockSize> x_old;
+  Aec3Fft fft;
+
+  for (auto& H2_k : H2) {
+    H2_k.fill(0.01f);
+  }
+  H2[2].fill(10.f);
+
+  constexpr float kLevel = 10.f;
+  E2_shadow.fill(kLevel);
+  E2_main.fill(kLevel);
+  S2_linear.fill(kLevel);
+  S2_fallback.fill(kLevel);
+  Y2.fill(kLevel);
+
+  for (int k = 0; k < 100; ++k) {
+    RandomizeSampleVector(&random_generator, x);
+    fft.PaddedFft(x, x_old, &X);
+    X_buffer.Insert(X);
+
+    aec_state.Update(H2, rtc::Optional<size_t>(2), X_buffer, E2_main, E2_shadow,
+                     Y2, x, echo_path_variability, false);
+
+    estimator.Estimate(true, aec_state, X_buffer, H2, E2_main, E2_shadow,
+                       S2_linear, S2_fallback, Y2, &R2);
+  }
+  std::for_each(R2.begin(), R2.end(),
+                [&](float a) { EXPECT_NEAR(kLevel, a, 0.1f); });
+}
+
+}  // namespace webrtc