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/*
* Copyright 2015 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 PC_MEDIASTREAMOBSERVER_H_
#define PC_MEDIASTREAMOBSERVER_H_
#include "api/mediastreaminterface.h"
#include "rtc_base/scoped_ref_ptr.h"
#include "rtc_base/sigslot.h"
namespace webrtc {
// Helper class which will listen for changes to a stream and emit the
// corresponding signals.
class MediaStreamObserver : public ObserverInterface {
public:
explicit MediaStreamObserver(MediaStreamInterface* stream);
~MediaStreamObserver();
const MediaStreamInterface* stream() const { return stream_; }
void OnChanged() override;
sigslot::signal2<AudioTrackInterface*, MediaStreamInterface*>
SignalAudioTrackAdded;
sigslot::signal2<AudioTrackInterface*, MediaStreamInterface*>
SignalAudioTrackRemoved;
sigslot::signal2<VideoTrackInterface*, MediaStreamInterface*>
SignalVideoTrackAdded;
sigslot::signal2<VideoTrackInterface*, MediaStreamInterface*>
SignalVideoTrackRemoved;
private:
rtc::scoped_refptr<MediaStreamInterface> stream_;
AudioTrackVector cached_audio_tracks_;
VideoTrackVector cached_video_tracks_;
};
} // namespace webrtc
#endif // PC_MEDIASTREAMOBSERVER_H_
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