Merge 143765 - Ensure media's buffered ranges always have a range that includes currentTime.

media/base/demuxer_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.
 
 #ifndef MEDIA_BASE_DEMUXER_STREAM_H_
 #define MEDIA_BASE_DEMUXER_STREAM_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/media_export.h"
+#include "media/base/ranges.h"
 
 namespace media {
 
 class AudioDecoderConfig;
 class DecoderBuffer;
 class VideoDecoderConfig;
 
 class MEDIA_EXPORT DemuxerStream
     : public base::RefCountedThreadSafe<DemuxerStream> {
  public:
@@ skipping 13 matching lines @@
   virtual void Read(const ReadCB& read_cb) = 0;
 
   // Returns the audio decoder configuration. It is an error to call this method
   // if type() != AUDIO.
   virtual const AudioDecoderConfig& audio_decoder_config() = 0;
 
   // Returns the video decoder configuration. It is an error to call this method
   // if type() != VIDEO.
   virtual const VideoDecoderConfig& video_decoder_config() = 0;
 
+  // Returns time ranges known to have been seen by this stream.
+  virtual Ranges<base::TimeDelta> GetBufferedRanges() = 0;
+
   // Returns the type of stream.
   virtual Type type() = 0;
 
   virtual void EnableBitstreamConverter() = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<DemuxerStream>;
   virtual ~DemuxerStream();
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DEMUXER_STREAM_H_