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 id()45 virtual std::string id() const { return id_; } state()46 virtual MediaStreamTrackInterface::TrackState state() const { 47 return state_; 48 } enabled()49 virtual bool enabled() const { return enabled_; } set_enabled(bool enable)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 } set_state(MediaStreamTrackInterface::TrackState new_state)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: MediaStreamTrack(const std::string & id)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_ 82