1 /* 2 * libjingle 3 * Copyright 2005 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 // Class to collect statistics from a media channel 29 30 #ifndef TALK_SESSION_MEDIA_MEDIAMONITOR_H_ 31 #define TALK_SESSION_MEDIA_MEDIAMONITOR_H_ 32 33 #include "talk/base/criticalsection.h" 34 #include "talk/base/sigslot.h" 35 #include "talk/base/thread.h" 36 #include "talk/media/base/mediachannel.h" 37 38 namespace cricket { 39 40 // The base MediaMonitor class, independent of voice and video. 41 class MediaMonitor : public talk_base::MessageHandler, 42 public sigslot::has_slots<> { 43 public: 44 MediaMonitor(talk_base::Thread* worker_thread, 45 talk_base::Thread* monitor_thread); 46 ~MediaMonitor(); 47 48 void Start(uint32 milliseconds); 49 void Stop(); 50 51 protected: 52 void OnMessage(talk_base::Message *message); 53 void PollMediaChannel(); 54 virtual void GetStats() = 0; 55 virtual void Update() = 0; 56 57 talk_base::CriticalSection crit_; 58 talk_base::Thread* worker_thread_; 59 talk_base::Thread* monitor_thread_; 60 bool monitoring_; 61 uint32 rate_; 62 }; 63 64 // Templatized MediaMonitor that can deal with different kinds of media. 65 template<class MC, class MI> 66 class MediaMonitorT : public MediaMonitor { 67 public: MediaMonitorT(MC * media_channel,talk_base::Thread * worker_thread,talk_base::Thread * monitor_thread)68 MediaMonitorT(MC* media_channel, talk_base::Thread* worker_thread, 69 talk_base::Thread* monitor_thread) 70 : MediaMonitor(worker_thread, monitor_thread), 71 media_channel_(media_channel) {} 72 sigslot::signal2<MC*, const MI&> SignalUpdate; 73 74 protected: 75 // These routines assume the crit_ lock is held by the calling thread. GetStats()76 virtual void GetStats() { 77 media_info_.Clear(); 78 media_channel_->GetStats(&media_info_); 79 } Update()80 virtual void Update() { 81 MI stats(media_info_); 82 crit_.Leave(); 83 SignalUpdate(media_channel_, stats); 84 crit_.Enter(); 85 } 86 87 private: 88 MC* media_channel_; 89 MI media_info_; 90 }; 91 92 typedef MediaMonitorT<VoiceMediaChannel, VoiceMediaInfo> VoiceMediaMonitor; 93 typedef MediaMonitorT<VideoMediaChannel, VideoMediaInfo> VideoMediaMonitor; 94 typedef MediaMonitorT<DataMediaChannel, DataMediaInfo> DataMediaMonitor; 95 96 } // namespace cricket 97 98 #endif // TALK_SESSION_MEDIA_MEDIAMONITOR_H_ 99