Use passthrough decoder for (E)AC3 formats

media/base/audio_buffer_unittest.cc

Index: media/base/audio_buffer_unittest.cc
diff --git a/media/base/audio_buffer_unittest.cc b/media/base/audio_buffer_unittest.cc
index b4a8a23254463f5be2d010281a0d3332f2b52af4..239d73a665b5b3db5b9dd9ac07905ddb81fdde67 100644
--- a/media/base/audio_buffer_unittest.cc
+++ b/media/base/audio_buffer_unittest.cc
@@ -180,6 +180,48 @@ TEST(AudioBufferTest, CopyFrom) {
   EXPECT_FALSE(original_buffer->end_of_stream());
 }
 
+TEST(AudioBufferTest, CopyBitstreamFrom) {
+  const ChannelLayout kChannelLayout = CHANNEL_LAYOUT_STEREO;
+  const int kChannelCount = ChannelLayoutToChannelCount(kChannelLayout);
+  const int kFrameCount = 128;
+  const uint8_t kTestData[] = {0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10,
+                               11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
+                               22, 23, 24, 25, 26, 27, 28, 29, 30, 31};
+  const base::TimeDelta kTimestamp = base::TimeDelta::FromMicroseconds(1337);
+  const uint8_t* const data[] = {kTestData};
+
+  scoped_refptr<AudioBuffer> buffer = AudioBuffer::CopyBitstreamFrom(
+      kSampleFormatAc3, kChannelLayout, kChannelCount, kSampleRate, kFrameCount,
+      data, sizeof(kTestData), kTimestamp);
+
+  EXPECT_EQ(kChannelLayout, buffer->channel_layout());
+  EXPECT_EQ(kFrameCount, buffer->frame_count());
+  EXPECT_EQ(kSampleRate, buffer->sample_rate());
+  EXPECT_EQ(kFrameCount, buffer->frame_count());
+  EXPECT_EQ(kTimestamp, buffer->timestamp());
+  EXPECT_TRUE(buffer->IsBitstreamFormat());
+  EXPECT_FALSE(buffer->end_of_stream());
+}
+
+TEST(AudioBufferTest, CreateBitstreamBuffer) {
+  const ChannelLayout kChannelLayout = CHANNEL_LAYOUT_STEREO;
+  const int kChannelCount = ChannelLayoutToChannelCount(kChannelLayout);
+  const int kFrameCount = 128;
+  const int kDataSize = 32;
+
+  scoped_refptr<AudioBuffer> buffer = AudioBuffer::CreateBitstreamBuffer(
+      kSampleFormatAc3, kChannelLayout, kChannelCount, kSampleRate, kFrameCount,
+      kDataSize);
+
+  EXPECT_EQ(kChannelLayout, buffer->channel_layout());
+  EXPECT_EQ(kFrameCount, buffer->frame_count());
+  EXPECT_EQ(kSampleRate, buffer->sample_rate());
+  EXPECT_EQ(kFrameCount, buffer->frame_count());
+  EXPECT_EQ(kNoTimestamp, buffer->timestamp());
+  EXPECT_TRUE(buffer->IsBitstreamFormat());
+  EXPECT_FALSE(buffer->end_of_stream());
+}
+
 TEST(AudioBufferTest, CreateEOSBuffer) {
   scoped_refptr<AudioBuffer> buffer = AudioBuffer::CreateEOSBuffer();
   EXPECT_TRUE(buffer->end_of_stream());