Update media duration if data is appended after the previous duration

media/filters/chunk_demuxer.h

 // Copyright (c) 2012 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_CHUNK_DEMUXER_H_
 #define MEDIA_FILTERS_CHUNK_DEMUXER_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 118 matching lines @@
   // buffered ranges.
   Ranges<base::TimeDelta> ComputeIntersection() const;
 
   // Applies |time_offset| to the timestamps of |buffers|.
   void AdjustBufferTimestamps(const StreamParser::BufferQueue& buffers,
                               base::TimeDelta timestamp_offset);
 
   // Returns true if |source_id| is valid, false otherwise.
   bool IsValidId(const std::string& source_id) const;
 
+  // Increases |duration_| if the newly appended |buffers| exceeds the current
+  // |duration_|.
+  void IncreaseDurationIfNecessary(const StreamParser::BufferQueue& buffers);
+
+  // Sets |duration_| to |new_duration| and notifies |host_|.
+  void UpdateDuration(base::TimeDelta new_duration);
+
+  // Returns the ranges representing the buffered data in the demuxer.
+  Ranges<base::TimeDelta> GetBufferedRanges() const;
+
   mutable base::Lock lock_;
   State state_;
 
   DemuxerHost* host_;
   ChunkDemuxerClient* client_;
   PipelineStatusCB init_cb_;
   PipelineStatusCB seek_cb_;
 
   scoped_refptr<ChunkDemuxerStream> audio_;
   scoped_refptr<ChunkDemuxerStream> video_;
@@ skipping 18 matching lines @@
   std::string source_id_video_;
 
   base::TimeDelta start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(ChunkDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_CHUNK_DEMUXER_H_