Support MPEG1 audio in the MPEG2-TS stream parser.

media/formats/mpeg/mp3_stream_parser.h

Index: media/formats/mpeg/mp3_stream_parser.h
diff --git a/media/formats/mpeg/mp3_stream_parser.h b/media/formats/mpeg/mp3_stream_parser.h
index b5271d848be31489e9f76c6686bb447cb6bc61b3..d645bc52832b30e1af404e7c7aa77628f8bb4240 100644
--- a/media/formats/mpeg/mp3_stream_parser.h
+++ b/media/formats/mpeg/mp3_stream_parser.h
@@ -13,6 +13,25 @@ namespace media {
 
 class MEDIA_EXPORT MP3StreamParser : public MPEGAudioStreamParserBase {
  public:
+  struct Mpeg1AudioHeader {
+    int version;
+    int layer;
+    int frame_size;
+    int sample_rate;
+    int channel_mode;
+    ChannelLayout channel_layout;
+    int sample_count;
+  };
+
+  static const int kMpeg1AudioHeaderSize;
+
+  // Assumption: size of array |data| should be at least the size of an Mpeg1
+  // audio header (i.e. should be greater than or equal to 4).

[damienv1, 2014/09/03 17:43:43]

Update the comment using kMpeg1AudioHeaderSize instead of hard-coded 4.

+  static bool ParserMpeg1AudioFrameHeader(

[damienv1, 2014/09/03 18:59:54]

Could be simply ParseMpeg1AudioHeader.

+      const LogCB& log_cb,
+      const uint8* data,
+      Mpeg1AudioHeader* header);
+
   MP3StreamParser();
   virtual ~MP3StreamParser();