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   // TODO(servolk): WebSourceBuffer::abort is being renamed into
  34   // resetParserState and will be removed soon
  35   virtual void abort();
  36   virtual void resetParserState();
  37   virtual void remove(double start, double end);
  38   virtual bool setTimestampOffset(double offset);
  39   virtual void setAppendWindowStart(double start);
  40   virtual void setAppendWindowEnd(double end);
  41   virtual void removedFromMediaSource();
  42
  43  private:
  44   // Demuxer callback handler to process an initialization segment received
  45   // during an append() call.
  46   void InitSegmentReceived();
  47
  48   std::string id_;
  49   ChunkDemuxer* demuxer_;  // Owned by WebMediaPlayerImpl.
  50
  51   blink::WebSourceBufferClient* client_;
  52
  53   // Controls the offset applied to timestamps when processing appended media
  54   // segments. It is initially 0, which indicates that no offset is being
  55   // applied. Both setTimestampOffset() and append() may update this value.
  56   base::TimeDelta timestamp_offset_;
  57
  58   base::TimeDelta append_window_start_;
  59   base::TimeDelta append_window_end_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(WebSourceBufferImpl);
  62 };
  63
  64 }  // namespace media
  65
  66 #endif  // MEDIA_BLINK_WEBSOURCEBUFFER_IMPL_H_