添加无人观看主动断开事件

src/MediaFile/MediaReader.cpp

@@ -166,11 +166,21 @@ void MediaReader::startReadMP4() {
 	 seek(ui32Stamp);
 	 return true;
 }
-bool MediaReader::close(){
+bool MediaReader::close(bool force){
+    if(!force && _mediaMuxer->readerCount() != 0 ){
+        return false;
+    }
 	_timer.reset();
     return true;
 }
 
+void MediaReader::onNoneReader(MediaSource &sender) {
+    if(_mediaMuxer->readerCount() != 0){
+        return;
+    }
+    MediaSourceEvent::onNoneReader(sender);
+}
+
 bool MediaReader::readSample(int iTimeInc,bool justSeekSyncFrame) {
 	TimeTicker();
 	lock_guard<recursive_mutex> lck(_mtx);