MediaStreamRecorder: Separate video/audio origin of timestamps for WebM muxer

media/muxers/webm_muxer.h

 // Copyright 2015 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_MUXERS_WEBM_MUXER_H_
 #define MEDIA_MUXERS_WEBM_MUXER_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 71 matching lines @@
   mkvmuxer::int32 Write(const void* buf, mkvmuxer::uint32 len) override;
   mkvmuxer::int64 Position() const override;
   mkvmuxer::int32 Position(mkvmuxer::int64 position) override;
   bool Seekable() const override;
   void ElementStartNotify(mkvmuxer::uint64 element_id,
                           mkvmuxer::int64 position) override;
 
   // Helper to simplify saving frames.
   void AddFrame(scoped_ptr<std::string> encoded_data,
                 uint8_t track_index,
-                base::TimeTicks timestamp,
+                base::TimeDelta timestamp,
                 bool is_key_frame);
 
   // Used to DCHECK that we are called on the correct thread.
   base::ThreadChecker thread_checker_;
 
   // Video Codec configured: VP9 if true, otherwise VP8 is used by default.
   const bool use_vp9_;
 
   // Caller-side identifiers to interact with |segment_|, initialised upon
   // first frame arrival to Add{Video, Audio}Track().
   uint8_t video_track_index_;
   uint8_t audio_track_index_;
 
   // Origin of times for frame timestamps.
-  base::TimeTicks first_frame_timestamp_;
+  base::TimeTicks first_frame_timestamp_video_;
+  base::TimeTicks first_frame_timestamp_audio_;
   base::TimeDelta most_recent_timestamp_;
 
   // Variables to measure and accumulate, respectively, the time in pause state.
   scoped_ptr<base::ElapsedTimer> elapsed_time_in_pause_;
   base::TimeDelta total_time_in_pause_;
 
   // TODO(ajose): Change these when support is added for multiple tracks.
   // http://crbug.com/528523
   const bool has_video_;
   const bool has_audio_;
@@ skipping 23 matching lines @@
     DISALLOW_IMPLICIT_CONSTRUCTORS(EncodedVideoFrame);
   };
   std::deque<scoped_ptr<EncodedVideoFrame>> encoded_frames_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(WebmMuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MUXERS_WEBM_MUXER_H_