精简代码，改善代码结构

src/Rtmp/RtmpMediaSourceImp.h

@@ -61,26 +61,14 @@ public:
      * 输入rtmp并解析
      */
     void onWrite(const RtmpPacket::Ptr &pkt,bool key_pos = true) override {
-        if(_all_track_ready && !_muxer->isEnabled()){
+        if (_all_track_ready && !_muxer->isEnabled()) {
             //获取到所有Track后，并且未开启转协议，那么不需要解复用rtmp
             key_pos = pkt->isVideoKeyFrame();
-        }else{
+        } else {
             //需要解复用rtmp
             key_pos = _demuxer->inputRtmp(pkt);
         }
-
-        RtmpMediaSource::onWrite(pkt,key_pos);
-    }
-
-    /**
-     * 设置监听器
-     * @param listener
-     */
-    void setListener(const std::weak_ptr<MediaSourceEvent> &listener) override {
-        RtmpMediaSource::setListener(listener);
-        if(_muxer){
-            _muxer->setMediaListener(listener);
-        }
+        RtmpMediaSource::onWrite(pkt, key_pos);
     }
 
     /**
@@ -90,33 +78,6 @@ public:
         return readerCount() + (_muxer ? _muxer->totalReaderCount() : 0);
     }
 
-    /**
-     * 设置录制状态
-     * @param type 录制类型
-     * @param start 开始或停止
-     * @param custom_path 开启录制时，指定自定义路径
-     * @return 是否设置成功
-     */
-    bool setupRecord(Recorder::type type, bool start, const string &custom_path) override{
-        if(_muxer){
-            return _muxer->setupRecord(*this,type, start, custom_path);
-        }
-        return RtmpMediaSource::setupRecord(type, start, custom_path);
-    }
-
-    /**
-     * 获取录制状态
-     * @param type 录制类型
-     * @return 录制状态
-     */
-    bool isRecording(Recorder::type type) override{
-        if(_muxer){
-            return _muxer->isRecording(*this,type);
-        }
-        return RtmpMediaSource::isRecording(type);
-    }
-
-
     /**
      * 设置协议转换
      * @param enableRtsp 是否转换成rtsp
@@ -128,6 +89,9 @@ public:
         _muxer = std::make_shared<MultiMediaSourceMuxer>(getVhost(), getApp(), getId(), _demuxer->getDuration(), enableRtsp, false, enableHls, enableMP4);
         _muxer->setMediaListener(getListener());
         _muxer->setTrackListener(static_pointer_cast<RtmpMediaSourceImp>(shared_from_this()));
+        //让_muxer对象拦截一部分事件(比如说录像相关事件)
+        setListener(_muxer);
+
         for(auto &track : _demuxer->getTracks(false)){
             _muxer->addTrack(track);
             track->addDelegate(_muxer);