Revert of Moved ring-buffer related files from common_audio to audio_processing"

webrtc/common_audio/blocker_unittest.cc

Index: webrtc/common_audio/blocker_unittest.cc
diff --git a/webrtc/common_audio/blocker_unittest.cc b/webrtc/common_audio/blocker_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..eea3e2516a08db71bbc1760975b4b5ffb7b9a307
--- /dev/null
+++ b/webrtc/common_audio/blocker_unittest.cc
@@ -0,0 +1,345 @@
+/*
+ *  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 <memory>
+
+#include "webrtc/common_audio/blocker.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "webrtc/base/arraysize.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