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1 /* | |
2 * libjingle | |
3 * Copyright 2011 Google Inc. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions are met: | |
7 * | |
8 * 1. Redistributions of source code must retain the above copyright notice, | |
9 * this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
11 * this list of conditions and the following disclaimer in the documentation | |
12 * and/or other materials provided with the distribution. | |
13 * 3. The name of the author may not be used to endorse or promote products | |
14 * derived from this software without specific prior written permission. | |
15 * | |
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 */ | |
27 | |
28 #ifndef TALK_APP_WEBRTC_MEDIASTREAMTRACK_H_ | |
29 #define TALK_APP_WEBRTC_MEDIASTREAMTRACK_H_ | |
30 | |
31 #include <string> | |
32 | |
33 #include "talk/app/webrtc/mediastreaminterface.h" | |
34 #include "talk/app/webrtc/notifier.h" | |
35 | |
36 namespace webrtc { | |
37 | |
38 // MediaTrack implements the interface common to AudioTrackInterface and | |
39 // VideoTrackInterface. | |
40 template <typename T> | |
41 class MediaStreamTrack : public Notifier<T> { | |
42 public: | |
43 typedef typename T::TrackState TypedTrackState; | |
44 | |
45 virtual std::string id() const { return id_; } | |
46 virtual MediaStreamTrackInterface::TrackState state() const { | |
47 return state_; | |
48 } | |
49 virtual bool enabled() const { return enabled_; } | |
50 virtual bool set_enabled(bool enable) { | |
51 bool fire_on_change = (enable != enabled_); | |
52 enabled_ = enable; | |
53 if (fire_on_change) { | |
54 Notifier<T>::FireOnChanged(); | |
55 } | |
56 return fire_on_change; | |
57 } | |
58 virtual bool set_state(MediaStreamTrackInterface::TrackState new_state) { | |
59 bool fire_on_change = (state_ != new_state); | |
60 state_ = new_state; | |
61 if (fire_on_change) | |
62 Notifier<T>::FireOnChanged(); | |
63 return true; | |
64 } | |
65 | |
66 protected: | |
67 explicit MediaStreamTrack(const std::string& id) | |
68 : enabled_(true), | |
69 id_(id), | |
70 state_(MediaStreamTrackInterface::kInitializing) { | |
71 } | |
72 | |
73 private: | |
74 bool enabled_; | |
75 std::string id_; | |
76 MediaStreamTrackInterface::TrackState state_; | |
77 }; | |
78 | |
79 } // namespace webrtc | |
80 | |
81 #endif // TALK_APP_WEBRTC_MEDIASTREAMTRACK_H_ | |
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