Support setting an explicit duration on MediaSource objects

media/filters/source_buffer_stream.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.
 
 // SourceBufferStream is a data structure that stores media Buffers in ranges.
 // Buffers can be appended out of presentation order. Buffers are retrieved by
 // seeking to the desired start point and calling GetNextBuffer(). Buffers are
 // returned in sequential presentation order.
 
 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_
@@ skipping 49 matching lines @@
   bool Append(const BufferQueue& buffers);
 
   // Changes the SourceBufferStream's state so that it will start returning
   // buffers starting from the closest keyframe before |timestamp|.
   void Seek(base::TimeDelta timestamp);
 
   // Returns true if the SourceBufferStream has seeked to a time without
   // buffered data and is waiting for more data to be appended.
   bool IsSeekPending() const;
 
+  // Notifies the SourceBufferStream that the media duration has been changed to
+  // |duration| so it should drop any data past that point.
+  void OnSetDuration(base::TimeDelta duration);
+
   // Fills |out_buffer| with a new buffer. Buffers are presented in order from
   // the last call to Seek(), or starting with the first buffer appended if
   // Seek() has not been called yet.
   // |out_buffer|'s timestamp may be earlier than the |timestamp| passed to
   // the last Seek() call.
   // Returns kSuccess if |out_buffer| is filled with a valid buffer, kNeedBuffer
   // if there is not enough data buffered to fulfill the request, and
   // kConfigChange if the next buffer requires a config change.
   Status GetNextBuffer(scoped_refptr<StreamParserBuffer>* out_buffer);
 
@@ skipping 90 matching lines @@
   RangeList::iterator AddToRanges(SourceBufferRange* new_range);
 
   // Returns an iterator that points to the place in |ranges_| where
   // |selected_range_| lives.
   RangeList::iterator GetSelectedRangeItr();
 
   // Sets the |selected_range_| to |range| and resets the next buffer position
   // for the previous |selected_range_|.
   void SetSelectedRange(SourceBufferRange* range);
 
+  // Resets this stream back to an unseeked state.
+  void ResetSeekState();
+
   // Returns true if |seek_timestamp| refers to the beginning of the first range
   // in |ranges_|, false otherwise or if |ranges_| is empty.
   bool ShouldSeekToStartOfBuffered(base::TimeDelta seek_timestamp) const;
 
   // Returns true if the timestamps of |buffers| are monotonically increasing
   // since the previous append to the media segment, false otherwise.
   bool IsMonotonicallyIncreasing(const BufferQueue& buffers) const;
 
   // Returns true if |selected_range_| is the only range in |ranges_| that
   // HasNextBufferPosition().
@@ skipping 70 matching lines @@
   // config. GetNextBuffer() must not be called again until
   // GetCurrentXXXDecoderConfig() has been called.
   bool config_change_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_