Revert of Added first layer of the echo canceller 3 functionality

webrtc/modules/audio_processing/aec3/cascaded_biquad_filter_unittest.cc

Index: webrtc/modules/audio_processing/aec3/cascaded_biquad_filter_unittest.cc
diff --git a/webrtc/modules/audio_processing/aec3/cascaded_biquad_filter_unittest.cc b/webrtc/modules/audio_processing/aec3/cascaded_biquad_filter_unittest.cc
deleted file mode 100644
index 7628a8814e5dfbea6a917c9301a1f480f8a53fe3..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_processing/aec3/cascaded_biquad_filter_unittest.cc
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- *  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 "webrtc/modules/audio_processing/aec3/cascaded_biquad_filter.h"
-
-#include <vector>
-
-#include "webrtc/test/gtest.h"
-
-namespace webrtc {
-
-namespace {
-
-// Coefficients for a second order Butterworth high-pass filter with cutoff
-// frequency 100 Hz.
-const CascadedBiQuadFilter::BiQuadCoefficients kHighPassFilterCoefficients = {
-    {0.97261f, -1.94523f, 0.97261f},
-    {-1.94448f, 0.94598f}};
-
-const CascadedBiQuadFilter::BiQuadCoefficients kTransparentCoefficients = {
-    {1.f, 0.f, 0.f},
-    {0.f, 0.f}};
-
-const CascadedBiQuadFilter::BiQuadCoefficients kBlockingCoefficients = {
-    {0.f, 0.f, 0.f},
-    {0.f, 0.f}};
-
-std::vector<float> CreateInputWithIncreasingValues(size_t vector_length) {
-  std::vector<float> v(vector_length);
-  for (size_t k = 0; k < v.size(); ++k) {
-    v[k] = k;
-  }
-  return v;
-}
-
-}  // namespace
-
-// Verifies that the filter applies an effect which removes the input signal.
-// The test also verifies that the in-place Process API call works as intended.
-TEST(CascadedBiquadFilter, BlockingConfiguration) {
-  std::vector<float> values = CreateInputWithIncreasingValues(1000);
-
-  CascadedBiQuadFilter filter(kBlockingCoefficients, 1);
-  filter.Process(values);
-
-  EXPECT_EQ(std::vector<float>(1000, 0.f), values);
-}
-
-// Verifies that the filter is able to form a zero-mean output from a
-// non-zeromean input signal when coefficients for a high-pass filter are
-// applied. The test also verifies that the filter works with multiple biquads.
-TEST(CascadedBiquadFilter, HighPassConfiguration) {
-  std::vector<float> values(1000);
-  for (size_t k = 0; k < values.size(); ++k) {
-    values[k] = 1.f;
-  }
-
-  CascadedBiQuadFilter filter(kHighPassFilterCoefficients, 2);
-  filter.Process(values);
-
-  for (size_t k = values.size() / 2; k < values.size(); ++k) {
-    EXPECT_NEAR(0.f, values[k], 1e-4);
-  }
-}
-
-// Verifies that the filter is able to produce a transparent effect with no
-// impact on the data when the proper coefficients are applied. The test also
-// verifies that the non-in-place Process API call works as intended.
-TEST(CascadedBiquadFilter, TransparentConfiguration) {
-  const std::vector<float> input = CreateInputWithIncreasingValues(1000);
-  std::vector<float> output(input.size());
-
-  CascadedBiQuadFilter filter(kTransparentCoefficients, 1);
-  filter.Process(input, output);
-
-  EXPECT_EQ(input, output);
-}
-
-#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
-// Verifies that the check of the lengths for the input and output works for the
-// non-in-place call.
-TEST(CascadedBiquadFilter, InputSizeCheckVerification) {
-  const std::vector<float> input = CreateInputWithIncreasingValues(10);
-  std::vector<float> output(input.size() - 1);
-
-  CascadedBiQuadFilter filter(kTransparentCoefficients, 1);
-  EXPECT_DEATH(filter.Process(input, output), "");
-}
-#endif
-
-}  // namespace webrtc