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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_MEDIA_BUFFERED_DATA_SOURCE_HOST_IMPL_H_
      6 #define CONTENT_RENDERER_MEDIA_BUFFERED_DATA_SOURCE_HOST_IMPL_H_
      7 
      8 #include "base/time/time.h"
      9 #include "content/common/content_export.h"
     10 #include "content/renderer/media/buffered_data_source.h"
     11 #include "media/base/ranges.h"
     12 
     13 namespace content {
     14 
     15 // Provides an implementation of BufferedDataSourceHost that translates the
     16 // buffered byte ranges into estimated time ranges.
     17 class CONTENT_EXPORT BufferedDataSourceHostImpl
     18     : public BufferedDataSourceHost {
     19  public:
     20   BufferedDataSourceHostImpl();
     21   virtual ~BufferedDataSourceHostImpl();
     22 
     23   // BufferedDataSourceHost implementation.
     24   virtual void SetTotalBytes(int64 total_bytes) OVERRIDE;
     25   virtual void AddBufferedByteRange(int64 start, int64 end) OVERRIDE;
     26 
     27   // Translate the byte ranges to time ranges and append them to the list.
     28   // TODO(sandersd): This is a confusing name, find something better.
     29   void AddBufferedTimeRanges(
     30       media::Ranges<base::TimeDelta>* buffered_time_ranges,
     31       base::TimeDelta media_duration) const;
     32 
     33   bool DidLoadingProgress();
     34 
     35  private:
     36   // Total size of the data source.
     37   int64 total_bytes_;
     38 
     39   // List of buffered byte ranges for estimating buffered time.
     40   media::Ranges<int64> buffered_byte_ranges_;
     41 
     42   // True when AddBufferedByteRange() has been called more recently than
     43   // DidLoadingProgress().
     44   bool did_loading_progress_;
     45 
     46   DISALLOW_COPY_AND_ASSIGN(BufferedDataSourceHostImpl);
     47 };
     48 
     49 }  // namespace content
     50 
     51 #endif  // CONTENT_RENDERER_MEDIA_BUFFERED_DATA_SOURCE_HOST_IMPL_H_
     52