Support (E)AC3 passthrough

media/base/audio_bus.h

Index: media/base/audio_bus.h
diff --git a/media/base/audio_bus.h b/media/base/audio_bus.h
index 0baa27aa57949480642efe1e68de17afeb45349f..38369c3793475cbd5c9f5e62d47373a229261c7b 100644
--- a/media/base/audio_bus.h
+++ b/media/base/audio_bus.h
@@ -69,6 +69,14 @@ class MEDIA_EXPORT AudioBus {
   void SetChannelData(int channel, float* data);
   void set_frames(int frames);
 
+  int data_size() const { return data_size_; }

[DaleCurtis, 2017/06/15 21:46:32]

this should be GetBitstreamDataSize() and DCHECK(is_bitstream_format_); ditto
for SetBitstreamDataSize();

[AndyWu, 2017/08/02 01:43:40]

Done.

+  void set_data_size(int data_size) { data_size_ = data_size; }
+
+  int is_bitstream_format() const { return is_bitstream_format_; }
+  void set_is_bitstream_format(bool is_bitstream_format) {
+    is_bitstream_format_ = is_bitstream_format;
+  }
+
   // Overwrites the sample values stored in this AudioBus instance with values
   // from a given interleaved |source_buffer| with expected layout
   // [ch0, ch1, ..., chN, ch0, ch1, ...] and sample values in the format
@@ -206,6 +214,8 @@ class MEDIA_EXPORT AudioBus {
 
   // Contiguous block of channel memory.
   std::unique_ptr<float, base::AlignedFreeDeleter> data_;
+  int data_size_;
+  bool is_bitstream_format_;
 
   // One float pointer per channel pointing to a contiguous block of memory for
   // that channel. If the memory is owned by this instance, this will