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/*
* Copyright 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
#define WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
#include <memory>
#include "webrtc/api/mediastreaminterface.h"
#include "webrtc/api/videotracksource.h"
#include "webrtc/base/asyncinvoker.h"
#include "webrtc/base/sigslot.h"
#include "webrtc/media/base/videocapturer.h"
#include "webrtc/media/base/videocommon.h"
// VideoCapturerTrackSource implements VideoTrackSourceInterface. 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 webrtc {
class MediaConstraintsInterface;
class VideoCapturerTrackSource : public VideoTrackSource,
public sigslot::has_slots<> {
public:
// Creates an instance of VideoCapturerTrackSource.
// VideoCapturerTrackSource take ownership of |capturer|.
// |constraints| can be NULL and in that case the camera is opened using a
// default resolution.
static rtc::scoped_refptr<VideoTrackSourceInterface> Create(
rtc::Thread* worker_thread,
cricket::VideoCapturer* capturer,
const webrtc::MediaConstraintsInterface* constraints,
bool remote);
static rtc::scoped_refptr<VideoTrackSourceInterface> Create(
rtc::Thread* worker_thread,
cricket::VideoCapturer* capturer,
bool remote);
bool is_screencast() const override {
return video_capturer_->IsScreencast();
}
rtc::Optional<bool> needs_denoising() const override {
return needs_denoising_;
}
bool GetStats(Stats* stats) override;
protected:
VideoCapturerTrackSource(rtc::Thread* worker_thread,
cricket::VideoCapturer* capturer,
bool remote);
virtual ~VideoCapturerTrackSource();
void Initialize(const webrtc::MediaConstraintsInterface* constraints);
private:
void Stop();
void OnStateChange(cricket::VideoCapturer* capturer,
cricket::CaptureState capture_state);
rtc::Thread* signaling_thread_;
rtc::Thread* worker_thread_;
rtc::AsyncInvoker invoker_;
std::unique_ptr<cricket::VideoCapturer> video_capturer_;
bool started_;
cricket::VideoFormat format_;
rtc::Optional<bool> needs_denoising_;
};
} // namespace webrtc
#endif // WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
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