MSE: Parse WebM TrackEntry DefaultDuration field

media/formats/webm/tracks_builder.h

Index: media/formats/webm/tracks_builder.h
diff --git a/media/formats/webm/tracks_builder.h b/media/formats/webm/tracks_builder.h
index ecd0fe5ce0a2740fe9dec8f5eb43db54b98c83d2..60ecc6be2e71728e5b3bca9faf4f0a0c4cc64aa5 100644
--- a/media/formats/webm/tracks_builder.h
+++ b/media/formats/webm/tracks_builder.h
@@ -18,9 +18,16 @@ class TracksBuilder {
   TracksBuilder();
   ~TracksBuilder();
 
+  // Only a non-negative |default_duration| will result in a serialized
+  // kWebMIdDefaultDuration element. Note, 0 is allowed here for testing, but it
+  // is an illegal value for DefaultDuration. Similar applies to
+  // |audio_channels|, |audio_sampling_frequency|, |video_pixel_width| and
+  // |video_pixel_height|.
   void AddTrack(int track_num, int track_type, int track_uid,
                 const std::string& codec_id, const std::string& name,
-                const std::string& language);
+                const std::string& language, int default_duration,
+                int video_pixel_width, int video_pixel_height,
+                int audio_channels, double audio_sampling_frequency);
 
   std::vector<uint8> Finish();
 
@@ -33,12 +40,16 @@ class TracksBuilder {
    public:
     Track(int track_num, int track_type, int track_uid,
           const std::string& codec_id, const std::string& name,
-          const std::string& language);
+          const std::string& language, int default_duration,
+          int video_pixel_width, int video_pixel_height,
+          int audio_channels, double audio_sampling_frequency);
 
     int GetSize() const;
     void Write(uint8** buf, int* buf_size) const;
    private:
     int GetPayloadSize() const;
+    int GetVideoPayloadSize() const;
+    int GetAudioPayloadSize() const;
 
     int track_num_;
     int track_type_;
@@ -46,6 +57,11 @@ class TracksBuilder {
     std::string codec_id_;
     std::string name_;
     std::string language_;
+    int default_duration_;
+    int video_pixel_width_;
+    int video_pixel_height_;
+    int audio_channels_;
+    double audio_sampling_frequency_;
   };
 
   typedef std::list<Track> TrackList;