添加媒体注册回调事件:#373

src/Common/MultiMediaSourceMuxer.cpp

@@ -287,6 +287,13 @@ void MultiMediaSourceMuxer::onNoneReader(MediaSource &sender){
     listener->onNoneReader(sender);
 }
 
+void MultiMediaSourceMuxer::onRegist(MediaSource &sender, bool regist){
+    auto listener = _listener.lock();
+    if (listener) {
+        listener->onRegist(sender, regist);
+    }
+}
+
 bool MultiMediaSourceMuxer::setupRecord(MediaSource &sender, Recorder::type type, bool start, const string &custom_path) {
     return _muxer->setupRecord(sender,type,start,custom_path);
 }