添加媒体注册回调事件:#373

server/FFmpegSource.cpp

@@ -249,6 +249,13 @@ void FFmpegSource::onNoneReader(MediaSource &sender){
     MediaSourceEvent::onNoneReader(sender);
 }
 
+void FFmpegSource::onRegist(MediaSource &sender, bool regist){
+    auto listener = _listener.lock();
+    if(listener){
+        listener->onRegist(sender, regist);
+    }
+}
+
 void FFmpegSource::onGetMediaSource(const MediaSource::Ptr &src) {
     _listener = src->getListener();
     src->setListener(shared_from_this());