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/*
* libjingle
* Copyright 2012 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_APP_WEBRTC_VIDEOSOURCE_H_
#define TALK_APP_WEBRTC_VIDEOSOURCE_H_
#include <list>
#include "talk/app/webrtc/mediastreaminterface.h"
#include "talk/app/webrtc/notifier.h"
#include "talk/app/webrtc/videosourceinterface.h"
#include "talk/app/webrtc/videotrackrenderers.h"
#include "talk/media/base/videocapturer.h"
#include "talk/media/base/videocommon.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/base/sigslot.h"
// VideoSource implements VideoSourceInterface. It owns a
// cricket::VideoCapturer and make sure the camera is started at a resolution
// that honors the constraints.
// The state is set depending on the result of starting the capturer.
// If the constraint can't be met or the capturer fails to start, the state
// transition to kEnded, otherwise it transitions to kLive.
namespace cricket {
class ChannelManager;
} // namespace cricket
namespace webrtc {
class MediaConstraintsInterface;
class VideoSource : public Notifier<VideoSourceInterface>,
public sigslot::has_slots<> {
public:
// Creates an instance of VideoSource.
// VideoSource take ownership of |capturer|.
// |constraints| can be NULL and in that case the camera is opened using a
// default resolution.
static rtc::scoped_refptr<VideoSource> Create(
cricket::ChannelManager* channel_manager,
cricket::VideoCapturer* capturer,
const webrtc::MediaConstraintsInterface* constraints,
bool remote);
SourceState state() const override { return state_; }
bool remote() const override { return remote_; }
virtual const cricket::VideoOptions* options() const { return &options_; }
virtual cricket::VideoRenderer* FrameInput();
virtual cricket::VideoCapturer* GetVideoCapturer() {
return video_capturer_.get();
}
void Stop() override;
void Restart() override;
// |output| will be served video frames as long as the underlying capturer
// is running video frames.
virtual void AddSink(cricket::VideoRenderer* output);
virtual void RemoveSink(cricket::VideoRenderer* output);
protected:
VideoSource(cricket::ChannelManager* channel_manager,
cricket::VideoCapturer* capturer,
bool remote);
virtual ~VideoSource();
void Initialize(const webrtc::MediaConstraintsInterface* constraints);
private:
void OnStateChange(cricket::VideoCapturer* capturer,
cricket::CaptureState capture_state);
void SetState(SourceState new_state);
cricket::ChannelManager* channel_manager_;
rtc::scoped_ptr<cricket::VideoCapturer> video_capturer_;
rtc::scoped_ptr<cricket::VideoRenderer> frame_input_;
std::list<cricket::VideoRenderer*> sinks_;
cricket::VideoFormat format_;
cricket::VideoOptions options_;
SourceState state_;
const bool remote_;
};
} // namespace webrtc
#endif // TALK_APP_WEBRTC_VIDEOSOURCE_H_
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