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/media/base/mediachannel.h" 34 #include "webrtc/base/criticalsection.h" 35 #include "webrtc/base/sigslot.h" 36 #include "webrtc/base/thread.h" 37 #include "webrtc/base/thread_annotations.h" 38 39 namespace cricket { 40 41 // The base MediaMonitor class, independent of voice and video. 42 class MediaMonitor : public rtc::MessageHandler, 43 public sigslot::has_slots<> { 44 public: 45 MediaMonitor(rtc::Thread* worker_thread, 46 rtc::Thread* monitor_thread); 47 ~MediaMonitor(); 48 49 void Start(uint32_t milliseconds); 50 void Stop(); 51 52 protected: 53 void OnMessage(rtc::Message *message); 54 void PollMediaChannel(); 55 virtual void GetStats() = 0; 56 virtual void Update() = 0; 57 58 rtc::CriticalSection crit_; 59 rtc::Thread* worker_thread_; 60 rtc::Thread* monitor_thread_; 61 bool monitoring_; 62 uint32_t rate_; 63 }; 64 65 // Templatized MediaMonitor that can deal with different kinds of media. 66 template<class MC, class MI> 67 class MediaMonitorT : public MediaMonitor { 68 public: MediaMonitorT(MC * media_channel,rtc::Thread * worker_thread,rtc::Thread * monitor_thread)69 MediaMonitorT(MC* media_channel, rtc::Thread* worker_thread, 70 rtc::Thread* monitor_thread) 71 : MediaMonitor(worker_thread, monitor_thread), 72 media_channel_(media_channel) {} 73 sigslot::signal2<MC*, const MI&> SignalUpdate; 74 75 protected: 76 // These routines assume the crit_ lock is held by the calling thread. GetStats()77 virtual void GetStats() { 78 media_info_.Clear(); 79 media_channel_->GetStats(&media_info_); 80 } Update()81 virtual void Update() EXCLUSIVE_LOCKS_REQUIRED(crit_) { 82 MI stats(media_info_); 83 crit_.Leave(); 84 SignalUpdate(media_channel_, stats); 85 crit_.Enter(); 86 } 87 88 private: 89 MC* media_channel_; 90 MI media_info_; 91 }; 92 93 typedef MediaMonitorT<VoiceMediaChannel, VoiceMediaInfo> VoiceMediaMonitor; 94 typedef MediaMonitorT<VideoMediaChannel, VideoMediaInfo> VideoMediaMonitor; 95 typedef MediaMonitorT<DataMediaChannel, DataMediaInfo> DataMediaMonitor; 96 97 } // namespace cricket 98 99 #endif // TALK_SESSION_MEDIA_MEDIAMONITOR_H_ 100