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1 /* | |
2 * Copyright 2015 The WebRTC project authors. All Rights Reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #ifndef WEBRTC_API_MEDIASTREAMOBSERVER_H_ | |
12 #define WEBRTC_API_MEDIASTREAMOBSERVER_H_ | |
13 | |
14 #include "webrtc/api/mediastreaminterface.h" | |
15 #include "webrtc/base/scoped_ref_ptr.h" | |
16 #include "webrtc/base/sigslot.h" | |
17 | |
18 namespace webrtc { | |
19 | |
20 // Helper class which will listen for changes to a stream and emit the | |
21 // corresponding signals. | |
22 class MediaStreamObserver : public ObserverInterface { | |
23 public: | |
24 explicit MediaStreamObserver(MediaStreamInterface* stream); | |
25 ~MediaStreamObserver(); | |
26 | |
27 const MediaStreamInterface* stream() const { return stream_; } | |
28 | |
29 void OnChanged() override; | |
30 | |
31 sigslot::signal2<AudioTrackInterface*, MediaStreamInterface*> | |
32 SignalAudioTrackAdded; | |
33 sigslot::signal2<AudioTrackInterface*, MediaStreamInterface*> | |
34 SignalAudioTrackRemoved; | |
35 sigslot::signal2<VideoTrackInterface*, MediaStreamInterface*> | |
36 SignalVideoTrackAdded; | |
37 sigslot::signal2<VideoTrackInterface*, MediaStreamInterface*> | |
38 SignalVideoTrackRemoved; | |
39 | |
40 private: | |
41 rtc::scoped_refptr<MediaStreamInterface> stream_; | |
42 AudioTrackVector cached_audio_tracks_; | |
43 VideoTrackVector cached_video_tracks_; | |
44 }; | |
45 | |
46 } // namespace webrtc | |
47 | |
48 #endif // WEBRTC_API_MEDIASTREAMOBSERVER_H_ | |
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