feat: add broadcast event for player count change

src/Common/MediaSource.cpp

@@ -651,7 +651,8 @@ MediaSource::Ptr MediaSource::createFromMP4(const string &schema, const string &
 
 /////////////////////////////////////MediaSourceEvent//////////////////////////////////////
 
-void MediaSourceEvent::onReaderChanged(MediaSource &sender, int size){
+void MediaSourceEvent::onReaderChanged(MediaSource &sender, int size) {
+    NOTICE_EMIT(BroadcastPlayerCountChangedArgs, Broadcast::kBroadcastPlayerCountChanged, sender.getMediaTuple(), sender.totalReaderCount());
     if (size || sender.totalReaderCount()) {
         //还有人观看该视频，不触发关闭事件
         _async_close_timer = nullptr;

src/Common/config.cpp

@@ -64,6 +64,7 @@ const string kBroadcastRtcSctpFailed = "kBroadcastRtcSctpFailed";
 const string kBroadcastRtcSctpClosed = "kBroadcastRtcSctpClosed";
 const string kBroadcastRtcSctpSend = "kBroadcastRtcSctpSend";
 const string kBroadcastRtcSctpReceived = "kBroadcastRtcSctpReceived";
+const string kBroadcastPlayerCountChanged = "kBroadcastPlayerCountChanged";
 
 } // namespace Broadcast
 

src/Common/config.h

@@ -124,6 +124,10 @@ extern const std::string kBroadcastRtcSctpSend;
 extern const std::string kBroadcastRtcSctpReceived;
 #define BroadcastRtcSctpReceivedArgs WebRtcTransport& sender, uint16_t &streamId, uint32_t &ppid, const uint8_t *&msg, size_t &len
 
+// 观看人数变化广播
+extern const std::string kBroadcastPlayerCountChanged;
+#define BroadcastPlayerCountChangedArgs const MediaTuple& args, int count
+
 #define ReloadConfigTag ((void *)(0xFF))
 #define RELOAD_KEY(arg, key)                                                                                           \
     do {                                                                                                               \