media/blink/buffered_data_source_host_impl.h

   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 MEDIA_BLINK_BUFFERED_DATA_SOURCE_HOST_IMPL_H_
   6 #define MEDIA_BLINK_BUFFERED_DATA_SOURCE_HOST_IMPL_H_
   7
   8 #include "base/time/time.h"
   9 #include "media/base/media_export.h"
  10 #include "media/base/ranges.h"
  11 #include "media/blink/buffered_data_source.h"
  12
  13 namespace media {
  14
  15 // Provides an implementation of BufferedDataSourceHost that translates the
  16 // buffered byte ranges into estimated time ranges.
  17 class MEDIA_EXPORT BufferedDataSourceHostImpl
  18     : public BufferedDataSourceHost {
  19  public:
  20   BufferedDataSourceHostImpl();
  21   ~BufferedDataSourceHostImpl() override;
  22
  23   // BufferedDataSourceHost implementation.
  24   void SetTotalBytes(int64 total_bytes) override;
  25   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       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   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 media
  50
  51 #endif  // MEDIA_BLINK_BUFFERED_DATA_SOURCE_HOST_IMPL_H_