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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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