MSE: Optimize frame processor appends to streams

media/filters/frame_processor.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_FILTERS_FRAME_PROCESSOR_H_
 #define MEDIA_FILTERS_FRAME_PROCESSOR_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 83 matching lines @@
   typedef std::map<StreamParser::TrackId, MseTrackBuffer*> TrackBufferMap;
 
   // If |track_buffers_| contains |id|, returns a pointer to the associated
   // MseTrackBuffer. Otherwise, returns NULL.
   MseTrackBuffer* FindTrack(StreamParser::TrackId id);
 
   // Signals all track buffers' streams that a new media segment is starting
   // with timestamp |segment_timestamp|.
   void NotifyNewMediaSegmentStarting(base::TimeDelta segment_timestamp);
 
+  // Helper that signals each track buffer to append any processed, but not yet
+  // appended, frames to its stream. Returns true on success, or false if one or
+  // more of the appends failed.
+  bool FlushProcessedFrames();
+
   // Handles partial append window trimming of |buffer|.  Returns true if the
   // given |buffer| can be partially trimmed or have preroll added; otherwise,
   // returns false.
   //
   // If |buffer| overlaps |append_window_start|, the portion of |buffer| before
   // |append_window_start| will be marked for post-decode discard.  Further, if
   // |audio_preroll_buffer_| exists and abuts |buffer|, it will be set as
   // preroll on |buffer| and |audio_preroll_buffer_| will be cleared.  If the
   // preroll buffer does not abut |buffer|, it will be discarded, but not used.
   //
@@ skipping 42 matching lines @@
   base::TimeDelta group_end_timestamp_;
 
   UpdateDurationCB update_duration_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameProcessor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FRAME_PROCESSOR_H_