WebmMuxer: add Pause()/Resume() methods and internal time-in-pause

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>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/numerics/safe_math.h"
 #include "base/strings/string_piece.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
+#include "base/timer/elapsed_timer.h"
 #include "media/base/media_export.h"
 #include "media/base/video_codecs.h"
 #include "third_party/libwebm/source/mkvmuxer.hpp"
 
 namespace gfx {
 class Size;
 }  // namespace gfx
 
 namespace media {
 
@@ skipping 28 matching lines @@
   // Functions to add video and audio frames with |encoded_data.data()|
   // to WebM Segment.
   void OnEncodedVideo(const scoped_refptr<VideoFrame>& video_frame,
                       scoped_ptr<std::string> encoded_data,
                       base::TimeTicks timestamp,
                       bool is_key_frame);
   void OnEncodedAudio(const media::AudioParameters& params,
                       scoped_ptr<std::string> encoded_data,
                       base::TimeTicks timestamp);
 
+  void Pause();
+  void Resume();
+
  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.
   void AddVideoTrack(const gfx::Size& frame_size, double frame_rate);
   void AddAudioTrack(const media::AudioParameters& params);
@@ skipping 20 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_;
   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_;
 
   // Callback to dump written data as being called by libwebm.
   const WriteDataCB write_data_callback_;
 
   // Rolling counter of the position in bytes of the written goo.
   base::CheckedNumeric<mkvmuxer::int64> position_;
@@ skipping 17 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_