58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
/*
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* Copyright 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef PC_MEDIA_STREAM_OBSERVER_H_
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#define PC_MEDIA_STREAM_OBSERVER_H_
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#include <functional>
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#include "api/media_stream_interface.h"
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#include "api/scoped_refptr.h"
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namespace webrtc {
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// Helper class which will listen for changes to a stream and emit the
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// corresponding signals.
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class MediaStreamObserver : public ObserverInterface {
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public:
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explicit MediaStreamObserver(
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MediaStreamInterface* stream,
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std::function<void(AudioTrackInterface*, MediaStreamInterface*)>
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audio_track_added_callback,
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std::function<void(AudioTrackInterface*, MediaStreamInterface*)>
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audio_track_removed_callback,
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std::function<void(VideoTrackInterface*, MediaStreamInterface*)>
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video_track_added_callback,
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std::function<void(VideoTrackInterface*, MediaStreamInterface*)>
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video_track_removed_callback);
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~MediaStreamObserver() override;
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const MediaStreamInterface* stream() const { return stream_.get(); }
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void OnChanged() override;
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private:
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rtc::scoped_refptr<MediaStreamInterface> stream_;
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AudioTrackVector cached_audio_tracks_;
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VideoTrackVector cached_video_tracks_;
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const std::function<void(AudioTrackInterface*, MediaStreamInterface*)>
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audio_track_added_callback_;
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const std::function<void(AudioTrackInterface*, MediaStreamInterface*)>
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audio_track_removed_callback_;
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const std::function<void(VideoTrackInterface*, MediaStreamInterface*)>
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video_track_added_callback_;
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const std::function<void(VideoTrackInterface*, MediaStreamInterface*)>
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video_track_removed_callback_;
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};
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} // namespace webrtc
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#endif // PC_MEDIA_STREAM_OBSERVER_H_
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