BufferedDataSource to support server without range request support...

media/base/filters.h

 // Copyright (c) 2006-2009 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.
 
 // Filters are connected in a strongly typed manner, with downstream filters
 // always reading data from upstream filters.  Upstream filters have no clue
 // who is actually reading from them, and return the results via callbacks.
 //
 //                         DemuxerStream(Video) <- VideoDecoder <- VideoRenderer
 // DataSource <- Demuxer <
@@ skipping 156 matching lines @@
   // kReadError in case of error.
   // TODO(hclam): should change |size| to int! It makes the code so messy
   // with size_t and int all over the place..
   virtual void Read(int64 position, size_t size,
                     uint8* data, ReadCallback* read_callback) = 0;
 
   // Returns true and the file size, false if the file size could not be
   // retrieved.
   virtual bool GetSize(int64* size_out) = 0;
 
-  // Returns true if this data source supports random seeking.
-  virtual bool IsSeekable() = 0;
+  // Returns true if we are performing streaming. In this case seeking is
+  // not possible.
+  virtual bool IsStreaming() = 0;
 };
 
 
 class Demuxer : public MediaFilter {
  public:
   static const FilterType filter_type() {
     return FILTER_DEMUXER;
   }
 
   static bool IsMediaFormatSupported(const MediaFormat& media_format) {
@@ skipping 129 matching lines @@
   // callback upon completion.
   virtual void Initialize(AudioDecoder* decoder, FilterCallback* callback) = 0;
 
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTERS_H_