Change segment width dynamically in MediaRecorder

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 63 matching lines @@
                       std::unique_ptr<std::string> encoded_alpha,
                       base::TimeTicks timestamp,
                       bool is_key_frame);
   bool OnEncodedAudio(const media::AudioParameters& params,
                       std::unique_ptr<std::string> encoded_data,
                       base::TimeTicks timestamp);
 
   void Pause();
   void Resume();
 
+  bool ResolutionChanged();
+
   void ForceOneLibWebmErrorForTesting() { force_one_libwebm_error_ = true; }
 
  private:
   friend class WebmMuxerTest;
 
   // Methods for creating and adding video and audio tracks, called upon
   // receiving the first frame of a given Track.
   // AddVideoTrack adds |frame_size| and |frame_rate| to the Segment
   // info, although individual frames passed to OnEncodedVideo() can have any
   // frame size.
@@ skipping 24 matching lines @@
   // 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_video_;
   base::TimeTicks first_frame_timestamp_audio_;
   base::TimeDelta most_recent_timestamp_;
 
+  gfx::Size last_frame_size_;
+
   // Variables to measure and accumulate, respectively, the time in pause state.
   std::unique_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_;
 
   // Callback to dump written data as being called by libwebm.
@@ skipping 25 matching lines @@
     DISALLOW_IMPLICIT_CONSTRUCTORS(EncodedVideoFrame);
   };
   std::deque<std::unique_ptr<EncodedVideoFrame>> encoded_frames_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(WebmMuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MUXERS_WEBM_MUXER_H_