MSE: Parse WebM TrackEntry DefaultDuration field

media/formats/webm/tracks_builder.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FORMATS_WEBM_TRACKS_BUILDER_H_
 #define MEDIA_FORMATS_WEBM_TRACKS_BUILDER_H_
 
 #include <list>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 
 namespace media {
 
 class TracksBuilder {
  public:
   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();
 
  private:
   int GetTracksSize() const;
   int GetTracksPayloadSize() const;
   void WriteTracks(uint8* buffer, int buffer_size) const;
 
   class Track {
    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_;
     int track_uid_;
     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;
   TrackList tracks_;
 
   DISALLOW_COPY_AND_ASSIGN(TracksBuilder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_TRACKS_BUILDER_H_