WIP - MSE: Drop non-keyframes that lack keyframe dependency

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 72 matching lines @@
   // Resets state for the coded frame processing algorithm as described in steps
   // 2-5 of the MSE Reset Parser State algorithm described at
   // http://www.w3.org/TR/media-source/#sourcebuffer-reset-parser-state
   void Reset();
 
   // Must be called when the audio config is updated.  Used to manage when
   // the preroll buffer is cleared and the allowed "fudge" factor between
   // preroll buffers.
   void OnPossibleAudioConfigUpdate(const AudioDecoderConfig& config);
 
+  // Must be called when the range removal algorithm has removed frames from the
+  // track associated with |track_id| in the inclusive range [|start_dts|,
+  // |end_dts|].
+  // Used to detect a potentially introduced append discontinuity caused by
+  // the range removal algorithm.
+  // Returns false on error, such as if |track_id| is unknown. Otherwise returns
+  // true.
+  bool OnRangeRemoval(StreamParser::TrackId track_id,
+                      DecodeTimestamp start_dts,
+                      DecodeTimestamp end_dts);
+
  private:
   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 decode timestamp |segment_timestamp|.
   void NotifyNewMediaSegmentStarting(DecodeTimestamp segment_timestamp);
@@ skipping 61 matching lines @@
   base::TimeDelta group_end_timestamp_;
 
   UpdateDurationCB update_duration_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameProcessor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FRAME_PROCESSOR_H_