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// Copyright (c) 2012 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_VIDEO_CAPTURE_MODULE_IMPL_H_
#define CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_MODULE_IMPL_H_
#include "base/compiler_specific.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "content/common/media/video_capture.h"
#include "media/video/capture/video_capture.h"
#include "media/video/capture/video_capture_types.h"
#include "third_party/webrtc/common_types.h"
#include "third_party/webrtc/modules/video_capture/main/interface/video_capture_defines.h"
#include "third_party/webrtc/modules/video_capture/main/source/video_capture_impl.h"
class VideoCaptureImplManager;
// An implementation of webrtc::VideoCaptureModule takes raw frames from video
// capture engine and passed them to webrtc VideoEngine.
class VideoCaptureModuleImpl
: public webrtc::videocapturemodule::VideoCaptureImpl,
public media::VideoCapture::EventHandler {
public:
VideoCaptureModuleImpl(const media::VideoCaptureSessionId id,
VideoCaptureImplManager* vc_manager);
// Implement reference counting. This make it possible to reference the
// object from both Chromium and WebRtc.
virtual int32_t AddRef() OVERRIDE;
virtual int32_t Release() OVERRIDE;
// Override webrtc::videocapturemodule::VideoCaptureImpl implementation.
virtual WebRtc_Word32 StartCapture(
const webrtc::VideoCaptureCapability& capability) OVERRIDE;
virtual WebRtc_Word32 StopCapture() OVERRIDE;
virtual bool CaptureStarted() OVERRIDE;
virtual WebRtc_Word32 CaptureSettings(
webrtc::VideoCaptureCapability& settings) OVERRIDE;
// media::VideoCapture::EventHandler implementation.
virtual void OnStarted(media::VideoCapture* capture) OVERRIDE;
virtual void OnStopped(media::VideoCapture* capture) OVERRIDE;
virtual void OnPaused(media::VideoCapture* capture) OVERRIDE;
virtual void OnError(media::VideoCapture* capture, int error_code) OVERRIDE;
virtual void OnRemoved(media::VideoCapture* capture) OVERRIDE;
virtual void OnBufferReady(
media::VideoCapture* capture,
scoped_refptr<media::VideoCapture::VideoFrameBuffer> buf) OVERRIDE;
virtual void OnDeviceInfoReceived(
media::VideoCapture* capture,
const media::VideoCaptureParams& device_info) OVERRIDE;
private:
virtual ~VideoCaptureModuleImpl();
void Init();
void StartCaptureOnCaptureThread(
const webrtc::VideoCaptureCapability& capability);
void StopCaptureOnCaptureThread();
void StartCaptureInternal(const webrtc::VideoCaptureCapability& capability);
void OnBufferReadyOnCaptureThread(
media::VideoCapture* capture,
scoped_refptr<media::VideoCapture::VideoFrameBuffer> buf);
// The id identifies which video capture device is used for this video
// capture session.
media::VideoCaptureSessionId session_id_;
base::Thread thread_;
scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
base::WaitableEvent stopped_event_;
// The video capture manager handles open/close of video capture devices.
scoped_refptr<VideoCaptureImplManager> vc_manager_;
video_capture::State state_;
WebRtc_UWord32 width_;
WebRtc_UWord32 height_;
WebRtc_Word32 frame_rate_;
webrtc::RawVideoType video_type_;
webrtc::VideoCaptureCapability frameInfo_;
base::Time start_time_;
// The video capture module generating raw frame data.
media::VideoCapture* capture_engine_;
int ref_count_;
DISALLOW_COPY_AND_ASSIGN(VideoCaptureModuleImpl);
};
#endif // CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_MODULE_IMPL_H_