media/mojo/services/mojo_demuxer_stream_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_MOJO_SERVICES_MOJO_DEMUXER_STREAM_IMPL_H_
   6 #define MEDIA_MOJO_SERVICES_MOJO_DEMUXER_STREAM_IMPL_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "media/base/demuxer_stream.h"
  11 #include "media/mojo/interfaces/demuxer_stream.mojom.h"
  12 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_impl.h"
  13
  14 namespace media {
  15 class DemuxerStream;
  16
  17 // This class wraps a media::DemuxerStream and exposes it as a
  18 // mojo::DemuxerStream for use as a proxy from remote applications.
  19 class MojoDemuxerStreamImpl : public mojo::InterfaceImpl<mojo::DemuxerStream> {
  20  public:
  21   // |stream| is the underlying DemuxerStream we are proxying for.
  22   // Note: |this| does not take ownership of |stream|.
  23   explicit MojoDemuxerStreamImpl(media::DemuxerStream* stream);
  24   ~MojoDemuxerStreamImpl() override;
  25
  26   // mojo::DemuxerStream implementation.
  27   void Read(const mojo::Callback<void(mojo::DemuxerStream::Status,
  28                                       mojo::MediaDecoderBufferPtr)>& callback)
  29       override;
  30
  31   void Initialize(
  32       mojo::DemuxerStreamObserverPtr observer,
  33       const mojo::Callback<void(mojo::ScopedDataPipeConsumerHandle)>& callback)
  34       override;
  35
  36  private:
  37   // |callback| is the callback that was passed to the initiating Read()
  38   //     call by our client.
  39   // |status| and |buffer| are the standard media::ReadCB parameters.
  40   typedef mojo::Callback<void(mojo::DemuxerStream::Status,
  41                               mojo::MediaDecoderBufferPtr)> BufferReadyCB;
  42   void OnBufferReady(const BufferReadyCB& callback,
  43                      media::DemuxerStream::Status status,
  44                      const scoped_refptr<media::DecoderBuffer>& buffer);
  45
  46   mojo::DemuxerStreamObserverPtr observer_;
  47
  48   // See constructor.  We do not own |stream_|.
  49   media::DemuxerStream* stream_;
  50
  51   // DataPipe for serializing the data section of DecoderBuffer into.
  52   mojo::ScopedDataPipeProducerHandle stream_pipe_;
  53
  54   base::WeakPtrFactory<MojoDemuxerStreamImpl> weak_factory_;
  55   DISALLOW_COPY_AND_ASSIGN(MojoDemuxerStreamImpl);
  56 };
  57
  58 }  // namespace media
  59
  60 #endif  // MEDIA_MOJO_SERVICES_MOJO_DEMUXER_STREAM_IMPL_H_