Roll up of playback rate efficiency improvements for M56.

media/filters/audio_renderer_algorithm_unittest.cc

Index: media/filters/audio_renderer_algorithm_unittest.cc
diff --git a/media/filters/audio_renderer_algorithm_unittest.cc b/media/filters/audio_renderer_algorithm_unittest.cc
index 53483f6d4e0832e503bec3405fdf29628add96ed..7cf6cb6e0a34aa510296e99b9fb5c5400b035f6d 100644
--- a/media/filters/audio_renderer_algorithm_unittest.cc
+++ b/media/filters/audio_renderer_algorithm_unittest.cc
@@ -83,13 +83,24 @@ class AudioRendererAlgorithmTest : public testing::Test {
   ~AudioRendererAlgorithmTest() override {}
 
   void Initialize() {
-    Initialize(CHANNEL_LAYOUT_STEREO, kSampleFormatS16, 3000, 300);
+    Initialize(CHANNEL_LAYOUT_STEREO, kSampleFormatS16, kSamplesPerSecond,
+               kSamplesPerSecond / 10);
   }
 
   void Initialize(ChannelLayout channel_layout,
                   SampleFormat sample_format,
                   int samples_per_second,
                   int frames_per_buffer) {
+    Initialize(
+        channel_layout, sample_format, samples_per_second, frames_per_buffer,
+        std::vector<bool>(ChannelLayoutToChannelCount(channel_layout), true));
+  }
+
+  void Initialize(ChannelLayout channel_layout,
+                  SampleFormat sample_format,
+                  int samples_per_second,
+                  int frames_per_buffer,
+                  std::vector<bool> channel_mask) {
     channels_ = ChannelLayoutToChannelCount(channel_layout);
     samples_per_second_ = samples_per_second;
     channel_layout_ = channel_layout;
@@ -99,6 +110,7 @@ class AudioRendererAlgorithmTest : public testing::Test {
                            channel_layout, samples_per_second,
                            bytes_per_sample_ * 8, frames_per_buffer);
     algorithm_.Initialize(params);
+    algorithm_.SetChannelMask(std::move(channel_mask));
     FillAlgorithmQueue();
   }
 
@@ -687,4 +699,39 @@ TEST_F(AudioRendererAlgorithmTest, FillBufferOffset) {
   }
 }
 
+TEST_F(AudioRendererAlgorithmTest, FillBuffer_ChannelMask) {
+  // Setup a quad channel layout where even channels are always muted.
+  Initialize(CHANNEL_LAYOUT_QUAD, kSampleFormatS16, 44100, 441,
+             {true, false, true, false});
+
+  std::unique_ptr<AudioBus> bus = AudioBus::Create(channels_, kFrameSize);
+  int frames_filled = algorithm_.FillBuffer(bus.get(), 0, kFrameSize, 2.0);
+  ASSERT_GT(frames_filled, 0);
+
+  // Verify the channels are muted appropriately; even though the created buffer
+  // actually has audio data in it.
+  for (int ch = 0; ch < bus->channels(); ++ch) {
+    double sum = 0;
+    for (int i = 0; i < bus->frames(); ++i)
+      sum += bus->channel(ch)[i];
+    if (ch % 2 == 1)
+      ASSERT_EQ(sum, 0);
+    else
+      ASSERT_NE(sum, 0);
+  }
+
+  // Update the channel mask and verify it's reflected correctly.
+  algorithm_.SetChannelMask({true, true, true, true});
+  frames_filled = algorithm_.FillBuffer(bus.get(), 0, kFrameSize, 2.0);
+  ASSERT_GT(frames_filled, 0);
+
+  // Verify no channels are muted now.
+  for (int ch = 0; ch < bus->channels(); ++ch) {
+    double sum = 0;
+    for (int i = 0; i < bus->frames(); ++i)
+      sum += bus->channel(ch)[i];
+    ASSERT_NE(sum, 0);
+  }
+}
+
 }  // namespace media