Implement WebRTC in Chrome for TV

content/renderer/media/rtc_video_decoder_factory_tv.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_TV_H_
+#define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_TV_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/message_loop.h"
+#include "content/common/content_export.h"
+#include "media/base/demuxer.h"
+#include "third_party/libjingle/source/talk/media/webrtc/webrtcvideodecoderfactory.h"
+#include "ui/gfx/size.h"
+
+namespace webrtc { class VideoDecoder; }
+
+namespace content {
+
+class MediaStreamDependencyFactory;
+class RTCDemuxerStream;
+class RTCVideoDecoderBridgeTv;
+
+// A factory object generating |RTCVideoDecoderBridgeTv| objects. This object
+// also functions as a |media::Demuxer| object to receive encoded streams from
+// the |RTCVideoDecoderBridgeTv| object (which inherits from
+// |webrtc::VideoDecoder|).
+class CONTENT_EXPORT RTCVideoDecoderFactoryTv
+    : NON_EXPORTED_BASE(public cricket::WebRtcVideoDecoderFactory),
+      public media::Demuxer {
+ public:
+  RTCVideoDecoderFactoryTv();
+  virtual ~RTCVideoDecoderFactoryTv();
+
+  // cricket::WebRtcVideoDecoderFactory implementation.
+  virtual webrtc::VideoDecoder* CreateVideoDecoder(webrtc::VideoCodecType type)
+      OVERRIDE;
+  virtual void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) OVERRIDE;
+
+  // Acquires and releases the demuxer functionality of this object. Only one
+  // client object can access demuxer functionality at a time. No calls to
+  // |media::Demuxer| implementations should be made without acquiring it first.
+  bool AcquireDemuxer();
+  void ReleaseDemuxer();
+
+  // media::Demuxer implementation.
+  virtual void Initialize(media::DemuxerHost* host,
+                          const media::PipelineStatusCB& cb) OVERRIDE;
+  virtual media::DemuxerStream* GetStream(media::DemuxerStream::Type type)
+      OVERRIDE;
+  virtual base::TimeDelta GetStartTime() const OVERRIDE;
+
+  // For RTCVideoDecoderBridgeTv to talk to RTCDemuxerStream.
+  void InitializeStream(const gfx::Size& size);
+  void QueueBuffer(scoped_refptr<media::DecoderBuffer> buffer,
+                   const base::Closure& done_cb,
+                   const gfx::Size& size);
+
+ private:
+  // All private variables are lock protected.
+  base::Lock lock_;
+  scoped_ptr<RTCVideoDecoderBridgeTv> decoder_;
+
+  media::PipelineStatusCB init_cb_;
+  scoped_ptr<RTCDemuxerStream> stream_;
+
+  bool is_acquired_;
+
+  DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoderFactoryTv);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_FACTORY_TV_H_