!17 【功能请求】 /index/api/getMediaList接口 增加LOSS字段用于统计每个轨道丢包率反馈

* update webrtc/WebRtcPusher.h.
* update webrtc/WebRtcPusher.cpp.
* update webrtc/WebRtcTransport.h.
* update webrtc/WebRtcTransport.cpp.
* update src/Common/MediaSource.h.
* update src/Common/MediaSource.cpp.
* update server/WebApi.cpp.

server/WebApi.cpp

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -343,6 +343,7 @@ Value makeMediaSourceJson(MediaSource &media){
         switch(codec_type){
             case TrackAudio : {
                 auto audio_track = dynamic_pointer_cast<AudioTrack>(track);
+                obj["loss"] = media.getLossRate(TrackAudio);
                 obj["sample_rate"] = audio_track->getAudioSampleRate();
                 obj["channels"] = audio_track->getAudioChannel();
                 obj["sample_bit"] = audio_track->getAudioSampleBit();
@@ -350,6 +351,7 @@ Value makeMediaSourceJson(MediaSource &media){
             }
             case TrackVideo : {
                 auto video_track = dynamic_pointer_cast<VideoTrack>(track);
+                obj["loss"] = media.getLossRate(TrackVideo);
                 obj["width"] = video_track->getVideoWidth();
                 obj["height"] = video_track->getVideoHeight();
                 obj["fps"] = round(video_track->getVideoFps());

src/Common/MediaSource.cpp

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -213,6 +213,14 @@ bool MediaSource::close(bool force) {
     return listener->close(*this,force);
 }
 
+int MediaSource::getLossRate(mediakit::TrackType type) {
+    auto listener = _listener.lock();
+    if (!listener) {
+        return -1;
+    }
+    return listener->getLossRate(*this, type);
+}
+
 void MediaSource::onReaderChanged(int size) {
     auto listener = _listener.lock();
     if (listener) {
@@ -690,6 +698,14 @@ void MediaSourceEventInterceptor::onRegist(MediaSource &sender, bool regist) {
     }
 }
 
+int MediaSourceEventInterceptor::getLossRate(MediaSource &sender, TrackType type){
+    auto listener = _listener.lock();
+    if (listener) {
+        return listener->getLossRate(sender, type);
+    }
+    return -1; //异常返回-1
+}
+
 bool MediaSourceEventInterceptor::setupRecord(MediaSource &sender, Recorder::type type, bool start, const string &custom_path, size_t max_second) {
     auto listener = _listener.lock();
     if (!listener) {

src/Common/MediaSource.h

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -78,6 +78,8 @@ public:
     //流注册或注销事件
     virtual void onRegist(MediaSource &sender, bool regist) {};
 
+    virtual int getLossRate(MediaSource &sender, TrackType type) {return -1;};
+
     ////////////////////////仅供MultiMediaSourceMuxer对象继承////////////////////////
     // 开启或关闭录制
     virtual bool setupRecord(MediaSource &sender, Recorder::type type, bool start, const std::string &custom_path, size_t max_second) { return false; };
@@ -142,7 +144,7 @@ public:
     std::vector<Track::Ptr> getMediaTracks(MediaSource &sender, bool trackReady = true) const override;
     void startSendRtp(MediaSource &sender, const SendRtpArgs &args, const std::function<void(uint16_t, const toolkit::SockException &)> cb) override;
     bool stopSendRtp(MediaSource &sender, const std::string &ssrc) override;
-
+    int getLossRate(MediaSource &sender, TrackType type) override;
 private:
     std::weak_ptr<MediaSourceEvent> _listener;
 };

webrtc/WebRtcPusher.cpp

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -146,4 +146,8 @@ void WebRtcPusher::onRtcConfigure(RtcConfigure &configure) const {
     WebRtcTransportImp::onRtcConfigure(configure);
     //这只是推流
     configure.audio.direction = configure.video.direction = RtpDirection::recvonly;
-}
\ No newline at end of file
+}
+
+int WebRtcPusher::getLossRate(MediaSource &sender,mediakit::TrackType type){
+    return WebRtcTransportImp::getLossRate(type);
+} 
\ No newline at end of file

webrtc/WebRtcPusher.h

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -40,6 +40,8 @@ protected:
     // 获取媒体源客户端相关信息
     std::shared_ptr<SockInfo> getOriginSock(mediakit::MediaSource &sender) const override;
 
+    int getLossRate(mediakit::MediaSource &sender,mediakit::TrackType type) override;
+
 private:
     WebRtcPusher(const EventPoller::Ptr &poller, const mediakit::RtspMediaSourceImp::Ptr &src,
                  const std::shared_ptr<void> &ownership, const mediakit::MediaInfo &info, const mediakit::ProtocolOption &option);

webrtc/WebRtcTransport.cpp

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -612,6 +612,10 @@ public:
     }
 
     int getLossRate() {
+        if (!_rtcp_context.getExpectedPacketsInterval()) //_rtcp_context.getExpectedPacketsInterval()取值总为零？
+		{
+			 return 0;		
+		}			
         return _rtcp_context.geLostInterval() * 100 / _rtcp_context.getExpectedPacketsInterval();
     }
 
@@ -655,6 +659,21 @@ std::shared_ptr<RtpChannel> MediaTrack::getRtpChannel(uint32_t ssrc) const{
     return it_chn->second;
 }
 
+int WebRtcTransportImp::getLossRate(mediakit::TrackType type){
+    for(auto it : _ssrc_to_track){
+       auto ssrc = it.first;
+       auto track = it.second;
+       auto rtp_chn = track->getRtpChannel(ssrc);
+       if(rtp_chn){
+            InfoL << "-----------接收丢包率,ssrc------------- :" << ssrc << ",loss rate(%):" << rtp_chn->getLossRate() ;
+            if (track->media && type==track->media->type){
+                return rtp_chn->getLossRate();
+            }
+       }
+    }
+     return -1;
+}
+
 void WebRtcTransportImp::onRtcp(const char *buf, size_t len) {
     _bytes_usage += len;
     auto rtcps = RtcpHeader::loadFromBytes((char *) buf, len);

webrtc/WebRtcTransport.h

-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -262,6 +262,7 @@ protected:
     void onShutdown(const SockException &ex) override;
     virtual void onRecvRtp(MediaTrack &track, const std::string &rid, mediakit::RtpPacket::Ptr rtp) = 0;
     void updateTicker();
+    int getLossRate(mediakit::TrackType type);
 
 private:
     void onSortedRtp(MediaTrack &track, const std::string &rid, mediakit::RtpPacket::Ptr rtp);