media/blink/websourcebuffer_impl.h

   1 // Copyright 2013 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_WEBSOURCEBUFFER_IMPL_H_
   6 #define MEDIA_BLINK_WEBSOURCEBUFFER_IMPL_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/time/time.h"
  13 #include "third_party/WebKit/public/platform/WebSourceBuffer.h"
  14
  15 namespace media {
  16 class ChunkDemuxer;
  17
  18 class WebSourceBufferImpl : public blink::WebSourceBuffer {
  19  public:
  20   WebSourceBufferImpl(const std::string& id, ChunkDemuxer* demuxer);
  21   virtual ~WebSourceBufferImpl();
  22
  23   // blink::WebSourceBuffer implementation.
  24   virtual void setClient(blink::WebSourceBufferClient* client);
  25   virtual bool setMode(AppendMode mode);
  26   virtual blink::WebTimeRanges buffered();
  27   virtual bool evictCodedFrames(double currentPlaybackTime,
  28                                 size_t newDataSize);
  29   virtual void append(
  30       const unsigned char* data,
  31       unsigned length,
  32       double* timestamp_offset);
  33   virtual void resetParserState();
  34   virtual void remove(double start, double end);
  35   virtual bool setTimestampOffset(double offset);
  36   virtual void setAppendWindowStart(double start);
  37   virtual void setAppendWindowEnd(double end);
  38   virtual void removedFromMediaSource();
  39
  40  private:
  41   // Demuxer callback handler to process an initialization segment received
  42   // during an append() call.
  43   void InitSegmentReceived();
  44
  45   std::string id_;
  46   ChunkDemuxer* demuxer_;  // Owned by WebMediaPlayerImpl.
  47
  48   blink::WebSourceBufferClient* client_;
  49
  50   // Controls the offset applied to timestamps when processing appended media
  51   // segments. It is initially 0, which indicates that no offset is being
  52   // applied. Both setTimestampOffset() and append() may update this value.
  53   base::TimeDelta timestamp_offset_;
  54
  55   base::TimeDelta append_window_start_;
  56   base::TimeDelta append_window_end_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(WebSourceBufferImpl);
  59 };
  60
  61 }  // namespace media
  62
  63 #endif  // MEDIA_BLINK_WEBSOURCEBUFFER_IMPL_H_