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      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 CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_TV_H_
      6 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_TV_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/message_loop/message_loop.h"
     11 #include "content/common/content_export.h"
     12 #include "media/base/demuxer.h"
     13 #include "third_party/libjingle/source/talk/media/webrtc/webrtcvideodecoderfactory.h"
     14 #include "ui/gfx/size.h"
     15 
     16 namespace webrtc {
     17 class VideoDecoder;
     18 }
     19 
     20 namespace content {
     21 
     22 class MediaStreamDependencyFactory;
     23 class RTCDemuxerStream;
     24 class RTCVideoDecoderBridgeTv;
     25 
     26 // A factory object generating |RTCVideoDecoderBridgeTv| objects. This object
     27 // also functions as a |media::Demuxer| object to receive encoded streams from
     28 // the |RTCVideoDecoderBridgeTv| object (which inherits from
     29 // |webrtc::VideoDecoder|).
     30 class CONTENT_EXPORT RTCVideoDecoderFactoryTv
     31     : NON_EXPORTED_BASE(public cricket::WebRtcVideoDecoderFactory),
     32       public media::Demuxer {
     33  public:
     34   RTCVideoDecoderFactoryTv();
     35   virtual ~RTCVideoDecoderFactoryTv();
     36 
     37   // cricket::WebRtcVideoDecoderFactory implementation.
     38   virtual webrtc::VideoDecoder* CreateVideoDecoder(
     39       webrtc::VideoCodecType type) OVERRIDE;
     40   virtual void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) OVERRIDE;
     41 
     42   // Acquires and releases the demuxer functionality of this object. Only one
     43   // client object can access demuxer functionality at a time. No calls to
     44   // |media::Demuxer| implementations should be made without acquiring it first.
     45   bool AcquireDemuxer();
     46   void ReleaseDemuxer();
     47 
     48   // media::Demuxer implementation.
     49   virtual void Initialize(media::DemuxerHost* host,
     50                           const media::PipelineStatusCB& cb) OVERRIDE;
     51   virtual media::DemuxerStream* GetStream(
     52       media::DemuxerStream::Type type) OVERRIDE;
     53   virtual base::TimeDelta GetStartTime() const OVERRIDE;
     54 
     55   // For RTCVideoDecoderBridgeTv to talk to RTCDemuxerStream.
     56   void InitializeStream(const gfx::Size& size);
     57   void QueueBuffer(scoped_refptr<media::DecoderBuffer> buffer,
     58                    const gfx::Size& size);
     59 
     60  private:
     61   // All private variables are lock protected.
     62   base::Lock lock_;
     63   scoped_ptr<RTCVideoDecoderBridgeTv> decoder_;
     64 
     65   media::PipelineStatusCB init_cb_;
     66   scoped_ptr<RTCDemuxerStream> stream_;
     67 
     68   bool is_acquired_;
     69 
     70   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoderFactoryTv);
     71 };
     72 
     73 }  // namespace content
     74 
     75 #endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_TV_H_
     76