MSE: Parse WebM TrackEntry DefaultDuration field

media/formats/webm/webm_tracks_parser.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_WEBM_TRACKS_PARSER_H_
 #define MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/media_log.h"
 #include "media/base/text_track_config.h"
 #include "media/base/video_decoder_config.h"
 #include "media/formats/webm/webm_audio_client.h"
 #include "media/formats/webm/webm_content_encodings_client.h"
 #include "media/formats/webm/webm_parser.h"
 #include "media/formats/webm/webm_video_client.h"
 
 namespace media {
 
 // Parser for WebM Tracks element.
 class MEDIA_EXPORT WebMTracksParser : public WebMParserClient {
  public:
   explicit WebMTracksParser(const LogCB& log_cb, bool ignore_text_tracks);
   virtual ~WebMTracksParser();
 
   // Parses a WebM Tracks element in |buf|.
   //
   // Returns -1 if the parse fails.
   // Returns 0 if more data is needed.
   // Returns the number of bytes parsed on success.
   int Parse(const uint8* buf, int size);
 
   int64 audio_track_num() const { return audio_track_num_; }
   int64 video_track_num() const { return video_track_num_; }
+
+  // If TrackEntry DefaultDuration field existed for the associated audio or
+  // video track, returns that value converted from ns to base::TimeDelta with
+  // precision not greater than |timecode_scale_in_us|. Defaults to
+  // kNoTimestamp().
+  base::TimeDelta GetAudioDefaultDuration(
+      const double timecode_scale_in_us) const;
+  base::TimeDelta GetVideoDefaultDuration(
+      const double timecode_scale_in_us) const;
+
   const std::set<int64>& ignored_tracks() const { return ignored_tracks_; }
 
   const std::string& audio_encryption_key_id() const {
     return audio_encryption_key_id_;
   }
 
   const AudioDecoderConfig& audio_decoder_config() {
     return audio_decoder_config_;
   }
 
@@ skipping 22 matching lines @@
 
   int64 track_type_;
   int64 track_num_;
   int64 track_uid_;
   std::string track_name_;
   std::string track_language_;
   std::string codec_id_;
   std::vector<uint8> codec_private_;
   int64 seek_preroll_;
   int64 codec_delay_;
+  int64 default_duration_;
   scoped_ptr<WebMContentEncodingsClient> track_content_encodings_client_;
 
   int64 audio_track_num_;
+  int64 audio_default_duration_;
   int64 video_track_num_;
+  int64 video_default_duration_;
   bool ignore_text_tracks_;
   TextTracks text_tracks_;
   std::set<int64> ignored_tracks_;
   std::string audio_encryption_key_id_;
   std::string video_encryption_key_id_;
   LogCB log_cb_;
 
   WebMAudioClient audio_client_;
   AudioDecoderConfig audio_decoder_config_;
 
   WebMVideoClient video_client_;
   VideoDecoderConfig video_decoder_config_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMTracksParser);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_