modules/audio_coding/codecs/opus/test/blocker_unittest.cc - src - Git at Google

 /*
  *  Copyright (c) 2014 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_coding/codecs/opus/test/blocker.h"

 #include <memory>

 #include "rtc_base/arraysize.h"
 #include "test/gtest.h"

 namespace {

 // Callback Function to add 3 to every sample in the signal.
 class PlusThreeBlockerCallback : public webrtc::BlockerCallback {
  public:
   void ProcessBlock(const float* const* input,
                     size_t num_frames,
                     size_t num_input_channels,
                     size_t num_output_channels,
                     float* const* output) override {
     for (size_t i = 0; i < num_output_channels; ++i) {
       for (size_t j = 0; j < num_frames; ++j) {
         output[i][j] = input[i][j] + 3;
       }
     }
   }
 };

 // No-op Callback Function.
 class CopyBlockerCallback : public webrtc::BlockerCallback {
  public:
   void ProcessBlock(const float* const* input,
                     size_t num_frames,
                     size_t num_input_channels,
                     size_t num_output_channels,
                     float* const* output) override {
     for (size_t i = 0; i < num_output_channels; ++i) {
       for (size_t j = 0; j < num_frames; ++j) {
         output[i][j] = input[i][j];
       }
     }
   }
 };

 }  // namespace

 namespace webrtc {

 // Tests blocking with a window that multiplies the signal by 2, a callback
 // that adds 3 to each sample in the signal, and different combinations of chunk
 // size, block size, and shift amount.
 class BlockerTest : public ::testing::Test {
  protected:
   void RunTest(Blocker* blocker,
                size_t chunk_size,
                size_t num_frames,
                const float* const* input,
                float* const* input_chunk,
                float* const* output,
                float* const* output_chunk,
                size_t num_input_channels,
                size_t num_output_channels) {
     size_t start = 0;
     size_t end = chunk_size - 1;
     while (end < num_frames) {
       CopyTo(input_chunk, 0, start, num_input_channels, chunk_size, input);
       blocker->ProcessChunk(input_chunk, chunk_size, num_input_channels,
                             num_output_channels, output_chunk);
       CopyTo(output, start, 0, num_output_channels, chunk_size, output_chunk);

       start += chunk_size;
       end += chunk_size;
     }
   }

   void ValidateSignalEquality(const float* const* expected,
                               const float* const* actual,
                               size_t num_channels,
                               size_t num_frames) {
     for (size_t i = 0; i < num_channels; ++i) {
       for (size_t j = 0; j < num_frames; ++j) {
         EXPECT_FLOAT_EQ(expected[i][j], actual[i][j]);
       }
     }
   }

   void ValidateInitialDelay(const float* const* output,
                             size_t num_channels,
                             size_t num_frames,
                             size_t initial_delay) {
     for (size_t i = 0; i < num_channels; ++i) {
       for (size_t j = 0; j < num_frames; ++j) {
         if (j < initial_delay) {
           EXPECT_FLOAT_EQ(output[i][j], 0.f);
         } else {
           EXPECT_GT(output[i][j], 0.f);
         }
       }
     }
   }

   static void CopyTo(float* const* dst,
                      size_t start_index_dst,
                      size_t start_index_src,
                      size_t num_channels,
                      size_t num_frames,
                      const float* const* src) {
     for (size_t i = 0; i < num_channels; ++i) {
       memcpy(&dst[i][start_index_dst], &src[i][start_index_src],
              num_frames * sizeof(float));
     }
   }
 };

 TEST_F(BlockerTest, TestBlockerMutuallyPrimeChunkandBlockSize) {
   const size_t kNumInputChannels = 3;
   const size_t kNumOutputChannels = 2;
   const size_t kNumFrames = 10;
   const size_t kBlockSize = 4;
   const size_t kChunkSize = 5;
   const size_t kShiftAmount = 2;

   const float kInput[kNumInputChannels][kNumFrames] = {
       {1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
       {2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
       {3, 3, 3, 3, 3, 3, 3, 3, 3, 3}};
   ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
   input_cb.SetDataForTesting(kInput[0], sizeof(kInput) / sizeof(**kInput));

   const float kExpectedOutput[kNumInputChannels][kNumFrames] = {
       {6, 6, 12, 20, 20, 20, 20, 20, 20, 20},
       {6, 6, 12, 28, 28, 28, 28, 28, 28, 28}};
   ChannelBuffer<float> expected_output_cb(kNumFrames, kNumInputChannels);
   expected_output_cb.SetDataForTesting(
       kExpectedOutput[0], sizeof(kExpectedOutput) / sizeof(**kExpectedOutput));

   const float kWindow[kBlockSize] = {2.f, 2.f, 2.f, 2.f};

   ChannelBuffer<float> actual_output_cb(kNumFrames, kNumOutputChannels);
   ChannelBuffer<float> input_chunk_cb(kChunkSize, kNumInputChannels);
   ChannelBuffer<float> output_chunk_cb(kChunkSize, kNumOutputChannels);

   PlusThreeBlockerCallback callback;
   Blocker blocker(kChunkSize, kBlockSize, kNumInputChannels, kNumOutputChannels,
                   kWindow, kShiftAmount, &callback);

   RunTest(&blocker, kChunkSize, kNumFrames, input_cb.channels(),
           input_chunk_cb.channels(), actual_output_cb.channels(),
           output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

   ValidateSignalEquality(expected_output_cb.channels(),
                          actual_output_cb.channels(), kNumOutputChannels,
                          kNumFrames);
 }

 TEST_F(BlockerTest, TestBlockerMutuallyPrimeShiftAndBlockSize) {
   const size_t kNumInputChannels = 3;
   const size_t kNumOutputChannels = 2;
   const size_t kNumFrames = 12;
   const size_t kBlockSize = 4;
   const size_t kChunkSize = 6;
   const size_t kShiftAmount = 3;

   const float kInput[kNumInputChannels][kNumFrames] = {
       {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
       {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
       {3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3}};
   ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
   input_cb.SetDataForTesting(kInput[0], sizeof(kInput) / sizeof(**kInput));

   const float kExpectedOutput[kNumOutputChannels][kNumFrames] = {
       {6, 10, 10, 20, 10, 10, 20, 10, 10, 20, 10, 10},
       {6, 14, 14, 28, 14, 14, 28, 14, 14, 28, 14, 14}};
   ChannelBuffer<float> expected_output_cb(kNumFrames, kNumOutputChannels);
   expected_output_cb.SetDataForTesting(
       kExpectedOutput[0], sizeof(kExpectedOutput) / sizeof(**kExpectedOutput));

   const float kWindow[kBlockSize] = {2.f, 2.f, 2.f, 2.f};

   ChannelBuffer<float> actual_output_cb(kNumFrames, kNumOutputChannels);
   ChannelBuffer<float> input_chunk_cb(kChunkSize, kNumInputChannels);
   ChannelBuffer<float> output_chunk_cb(kChunkSize, kNumOutputChannels);

   PlusThreeBlockerCallback callback;
   Blocker blocker(kChunkSize, kBlockSize, kNumInputChannels, kNumOutputChannels,
                   kWindow, kShiftAmount, &callback);

   RunTest(&blocker, kChunkSize, kNumFrames, input_cb.channels(),
           input_chunk_cb.channels(), actual_output_cb.channels(),
           output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

   ValidateSignalEquality(expected_output_cb.channels(),
                          actual_output_cb.channels(), kNumOutputChannels,
                          kNumFrames);
 }

 TEST_F(BlockerTest, TestBlockerNoOverlap) {
   const size_t kNumInputChannels = 3;
   const size_t kNumOutputChannels = 2;
   const size_t kNumFrames = 12;
   const size_t kBlockSize = 4;
   const size_t kChunkSize = 4;
   const size_t kShiftAmount = 4;

   const float kInput[kNumInputChannels][kNumFrames] = {
       {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
       {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
       {3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3}};
   ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
   input_cb.SetDataForTesting(kInput[0], sizeof(kInput) / sizeof(**kInput));

   const float kExpectedOutput[kNumOutputChannels][kNumFrames] = {
       {10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
       {14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14}};
   ChannelBuffer<float> expected_output_cb(kNumFrames, kNumOutputChannels);
   expected_output_cb.SetDataForTesting(
       kExpectedOutput[0], sizeof(kExpectedOutput) / sizeof(**kExpectedOutput));

   const float kWindow[kBlockSize] = {2.f, 2.f, 2.f, 2.f};

   ChannelBuffer<float> actual_output_cb(kNumFrames, kNumOutputChannels);
   ChannelBuffer<float> input_chunk_cb(kChunkSize, kNumInputChannels);
   ChannelBuffer<float> output_chunk_cb(kChunkSize, kNumOutputChannels);

   PlusThreeBlockerCallback callback;
   Blocker blocker(kChunkSize, kBlockSize, kNumInputChannels, kNumOutputChannels,
                   kWindow, kShiftAmount, &callback);

   RunTest(&blocker, kChunkSize, kNumFrames, input_cb.channels(),
           input_chunk_cb.channels(), actual_output_cb.channels(),
           output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

   ValidateSignalEquality(expected_output_cb.channels(),
                          actual_output_cb.channels(), kNumOutputChannels,
                          kNumFrames);
 }

 TEST_F(BlockerTest, InitialDelaysAreMinimum) {
   const size_t kNumInputChannels = 3;
   const size_t kNumOutputChannels = 2;
   const size_t kNumFrames = 1280;
   const size_t kChunkSize[] = {80,  80,  80,  80,  80,  80,
                                160, 160, 160, 160, 160, 160};
   const size_t kBlockSize[] = {64,  64,  64,  128, 128, 128,
                                128, 128, 128, 256, 256, 256};
   const size_t kShiftAmount[] = {16, 32, 64,  32, 64,  128,
                                  32, 64, 128, 64, 128, 256};
   const size_t kInitialDelay[] = {48, 48, 48, 112, 112, 112,
                                   96, 96, 96, 224, 224, 224};

   float input[kNumInputChannels][kNumFrames];
   for (size_t i = 0; i < kNumInputChannels; ++i) {
     for (size_t j = 0; j < kNumFrames; ++j) {
       input[i][j] = i + 1;
     }
   }
   ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
   input_cb.SetDataForTesting(input[0], sizeof(input) / sizeof(**input));

   ChannelBuffer<float> output_cb(kNumFrames, kNumOutputChannels);

   CopyBlockerCallback callback;

   for (size_t i = 0; i < arraysize(kChunkSize); ++i) {
     std::unique_ptr<float[]> window(new float[kBlockSize[i]]);
     for (size_t j = 0; j < kBlockSize[i]; ++j) {
       window[j] = 1.f;
     }

     ChannelBuffer<float> input_chunk_cb(kChunkSize[i], kNumInputChannels);
     ChannelBuffer<float> output_chunk_cb(kChunkSize[i], kNumOutputChannels);

     Blocker blocker(kChunkSize[i], kBlockSize[i], kNumInputChannels,
                     kNumOutputChannels, window.get(), kShiftAmount[i],
                     &callback);

     RunTest(&blocker, kChunkSize[i], kNumFrames, input_cb.channels(),
             input_chunk_cb.channels(), output_cb.channels(),
             output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

     ValidateInitialDelay(output_cb.channels(), kNumOutputChannels, kNumFrames,
                          kInitialDelay[i]);
   }
 }

 }  // namespace webrtc
	/*
	* Copyright (c) 2014 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_coding/codecs/opus/test/blocker.h"

	#include <memory>

	#include "rtc_base/arraysize.h"
	#include "test/gtest.h"

	namespace {

	// Callback Function to add 3 to every sample in the signal.
	class PlusThreeBlockerCallback : public webrtc::BlockerCallback {
	public:
	void ProcessBlock(const float* const* input,
	size_t num_frames,
	size_t num_input_channels,
	size_t num_output_channels,
	float* const* output) override {
	for (size_t i = 0; i < num_output_channels; ++i) {
	for (size_t j = 0; j < num_frames; ++j) {
	output[i][j] = input[i][j] + 3;
	}
	}
	}
	};

	// No-op Callback Function.
	class CopyBlockerCallback : public webrtc::BlockerCallback {
	public:
	void ProcessBlock(const float* const* input,
	size_t num_frames,
	size_t num_input_channels,
	size_t num_output_channels,
	float* const* output) override {
	for (size_t i = 0; i < num_output_channels; ++i) {
	for (size_t j = 0; j < num_frames; ++j) {
	output[i][j] = input[i][j];
	}
	}
	}
	};

	} // namespace

	namespace webrtc {

	// Tests blocking with a window that multiplies the signal by 2, a callback
	// that adds 3 to each sample in the signal, and different combinations of chunk
	// size, block size, and shift amount.
	class BlockerTest : public ::testing::Test {
	protected:
	void RunTest(Blocker* blocker,
	size_t chunk_size,
	size_t num_frames,
	const float* const* input,
	float* const* input_chunk,
	float* const* output,
	float* const* output_chunk,
	size_t num_input_channels,
	size_t num_output_channels) {
	size_t start = 0;
	size_t end = chunk_size - 1;
	while (end < num_frames) {
	CopyTo(input_chunk, 0, start, num_input_channels, chunk_size, input);
	blocker->ProcessChunk(input_chunk, chunk_size, num_input_channels,
	num_output_channels, output_chunk);
	CopyTo(output, start, 0, num_output_channels, chunk_size, output_chunk);

	start += chunk_size;
	end += chunk_size;
	}
	}

	void ValidateSignalEquality(const float* const* expected,
	const float* const* actual,
	size_t num_channels,
	size_t num_frames) {
	for (size_t i = 0; i < num_channels; ++i) {
	for (size_t j = 0; j < num_frames; ++j) {
	EXPECT_FLOAT_EQ(expected[i][j], actual[i][j]);
	}
	}
	}

	void ValidateInitialDelay(const float* const* output,
	size_t num_channels,
	size_t num_frames,
	size_t initial_delay) {
	for (size_t i = 0; i < num_channels; ++i) {
	for (size_t j = 0; j < num_frames; ++j) {
	if (j < initial_delay) {
	EXPECT_FLOAT_EQ(output[i][j], 0.f);
	} else {
	EXPECT_GT(output[i][j], 0.f);
	}
	}
	}
	}

	static void CopyTo(float* const* dst,
	size_t start_index_dst,
	size_t start_index_src,
	size_t num_channels,
	size_t num_frames,
	const float* const* src) {
	for (size_t i = 0; i < num_channels; ++i) {
	memcpy(&dst[i][start_index_dst], &src[i][start_index_src],
	num_frames * sizeof(float));
	}
	}
	};

	TEST_F(BlockerTest, TestBlockerMutuallyPrimeChunkandBlockSize) {
	const size_t kNumInputChannels = 3;
	const size_t kNumOutputChannels = 2;
	const size_t kNumFrames = 10;
	const size_t kBlockSize = 4;
	const size_t kChunkSize = 5;
	const size_t kShiftAmount = 2;

	const float kInput[kNumInputChannels][kNumFrames] = {
	{1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
	{2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
	{3, 3, 3, 3, 3, 3, 3, 3, 3, 3}};
	ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
	input_cb.SetDataForTesting(kInput[0], sizeof(kInput) / sizeof(**kInput));

	const float kExpectedOutput[kNumInputChannels][kNumFrames] = {
	{6, 6, 12, 20, 20, 20, 20, 20, 20, 20},
	{6, 6, 12, 28, 28, 28, 28, 28, 28, 28}};
	ChannelBuffer<float> expected_output_cb(kNumFrames, kNumInputChannels);
	expected_output_cb.SetDataForTesting(
	kExpectedOutput[0], sizeof(kExpectedOutput) / sizeof(**kExpectedOutput));

	const float kWindow[kBlockSize] = {2.f, 2.f, 2.f, 2.f};

	ChannelBuffer<float> actual_output_cb(kNumFrames, kNumOutputChannels);
	ChannelBuffer<float> input_chunk_cb(kChunkSize, kNumInputChannels);
	ChannelBuffer<float> output_chunk_cb(kChunkSize, kNumOutputChannels);

	PlusThreeBlockerCallback callback;
	Blocker blocker(kChunkSize, kBlockSize, kNumInputChannels, kNumOutputChannels,
	kWindow, kShiftAmount, &callback);

	RunTest(&blocker, kChunkSize, kNumFrames, input_cb.channels(),
	input_chunk_cb.channels(), actual_output_cb.channels(),
	output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

	ValidateSignalEquality(expected_output_cb.channels(),
	actual_output_cb.channels(), kNumOutputChannels,
	kNumFrames);
	}

	TEST_F(BlockerTest, TestBlockerMutuallyPrimeShiftAndBlockSize) {
	const size_t kNumInputChannels = 3;
	const size_t kNumOutputChannels = 2;
	const size_t kNumFrames = 12;
	const size_t kBlockSize = 4;
	const size_t kChunkSize = 6;
	const size_t kShiftAmount = 3;

	const float kInput[kNumInputChannels][kNumFrames] = {
	{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
	{2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
	{3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3}};
	ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
	input_cb.SetDataForTesting(kInput[0], sizeof(kInput) / sizeof(**kInput));

	const float kExpectedOutput[kNumOutputChannels][kNumFrames] = {
	{6, 10, 10, 20, 10, 10, 20, 10, 10, 20, 10, 10},
	{6, 14, 14, 28, 14, 14, 28, 14, 14, 28, 14, 14}};
	ChannelBuffer<float> expected_output_cb(kNumFrames, kNumOutputChannels);
	expected_output_cb.SetDataForTesting(
	kExpectedOutput[0], sizeof(kExpectedOutput) / sizeof(**kExpectedOutput));

	const float kWindow[kBlockSize] = {2.f, 2.f, 2.f, 2.f};

	ChannelBuffer<float> actual_output_cb(kNumFrames, kNumOutputChannels);
	ChannelBuffer<float> input_chunk_cb(kChunkSize, kNumInputChannels);
	ChannelBuffer<float> output_chunk_cb(kChunkSize, kNumOutputChannels);

	PlusThreeBlockerCallback callback;
	Blocker blocker(kChunkSize, kBlockSize, kNumInputChannels, kNumOutputChannels,
	kWindow, kShiftAmount, &callback);

	RunTest(&blocker, kChunkSize, kNumFrames, input_cb.channels(),
	input_chunk_cb.channels(), actual_output_cb.channels(),
	output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

	ValidateSignalEquality(expected_output_cb.channels(),
	actual_output_cb.channels(), kNumOutputChannels,
	kNumFrames);
	}

	TEST_F(BlockerTest, TestBlockerNoOverlap) {
	const size_t kNumInputChannels = 3;
	const size_t kNumOutputChannels = 2;
	const size_t kNumFrames = 12;
	const size_t kBlockSize = 4;
	const size_t kChunkSize = 4;
	const size_t kShiftAmount = 4;

	const float kInput[kNumInputChannels][kNumFrames] = {
	{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
	{2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
	{3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3}};
	ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
	input_cb.SetDataForTesting(kInput[0], sizeof(kInput) / sizeof(**kInput));

	const float kExpectedOutput[kNumOutputChannels][kNumFrames] = {
	{10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
	{14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14}};
	ChannelBuffer<float> expected_output_cb(kNumFrames, kNumOutputChannels);
	expected_output_cb.SetDataForTesting(
	kExpectedOutput[0], sizeof(kExpectedOutput) / sizeof(**kExpectedOutput));

	const float kWindow[kBlockSize] = {2.f, 2.f, 2.f, 2.f};

	ChannelBuffer<float> actual_output_cb(kNumFrames, kNumOutputChannels);
	ChannelBuffer<float> input_chunk_cb(kChunkSize, kNumInputChannels);
	ChannelBuffer<float> output_chunk_cb(kChunkSize, kNumOutputChannels);

	PlusThreeBlockerCallback callback;
	Blocker blocker(kChunkSize, kBlockSize, kNumInputChannels, kNumOutputChannels,
	kWindow, kShiftAmount, &callback);

	RunTest(&blocker, kChunkSize, kNumFrames, input_cb.channels(),
	input_chunk_cb.channels(), actual_output_cb.channels(),
	output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

	ValidateSignalEquality(expected_output_cb.channels(),
	actual_output_cb.channels(), kNumOutputChannels,
	kNumFrames);
	}

	TEST_F(BlockerTest, InitialDelaysAreMinimum) {
	const size_t kNumInputChannels = 3;
	const size_t kNumOutputChannels = 2;
	const size_t kNumFrames = 1280;
	const size_t kChunkSize[] = {80, 80, 80, 80, 80, 80,
	160, 160, 160, 160, 160, 160};
	const size_t kBlockSize[] = {64, 64, 64, 128, 128, 128,
	128, 128, 128, 256, 256, 256};
	const size_t kShiftAmount[] = {16, 32, 64, 32, 64, 128,
	32, 64, 128, 64, 128, 256};
	const size_t kInitialDelay[] = {48, 48, 48, 112, 112, 112,
	96, 96, 96, 224, 224, 224};

	float input[kNumInputChannels][kNumFrames];
	for (size_t i = 0; i < kNumInputChannels; ++i) {
	for (size_t j = 0; j < kNumFrames; ++j) {
	input[i][j] = i + 1;
	}
	}
	ChannelBuffer<float> input_cb(kNumFrames, kNumInputChannels);
	input_cb.SetDataForTesting(input[0], sizeof(input) / sizeof(**input));

	ChannelBuffer<float> output_cb(kNumFrames, kNumOutputChannels);

	CopyBlockerCallback callback;

	for (size_t i = 0; i < arraysize(kChunkSize); ++i) {
	std::unique_ptr<float[]> window(new float[kBlockSize[i]]);
	for (size_t j = 0; j < kBlockSize[i]; ++j) {
	window[j] = 1.f;
	}

	ChannelBuffer<float> input_chunk_cb(kChunkSize[i], kNumInputChannels);
	ChannelBuffer<float> output_chunk_cb(kChunkSize[i], kNumOutputChannels);

	Blocker blocker(kChunkSize[i], kBlockSize[i], kNumInputChannels,
	kNumOutputChannels, window.get(), kShiftAmount[i],
	&callback);

	RunTest(&blocker, kChunkSize[i], kNumFrames, input_cb.channels(),
	input_chunk_cb.channels(), output_cb.channels(),
	output_chunk_cb.channels(), kNumInputChannels, kNumOutputChannels);

	ValidateInitialDelay(output_cb.channels(), kNumOutputChannels, kNumFrames,
	kInitialDelay[i]);
	}
	}

	} // namespace webrtc