修复whip delete_webrtc未注销流 (#2688)

bug触发条件：
1、obs whip 推流到zlm
2、关闭推流
3、zlm 未注销流

webrtc/WebRtcPusher.cpp

@@ -149,7 +149,7 @@ void WebRtcPusher::onRtcConfigure(RtcConfigure &configure) const {
     configure.audio.direction = configure.video.direction = RtpDirection::recvonly;
 }
 
-float WebRtcPusher::getLossRate(MediaSource &sender,TrackType type){
+float WebRtcPusher::getLossRate(MediaSource &sender,TrackType type) {
     return WebRtcTransportImp::getLossRate(type);
 }
 
@@ -159,8 +159,13 @@ void WebRtcPusher::OnDtlsTransportClosed(const RTC::DtlsTransport *dtlsTransport
     WebRtcTransportImp::OnDtlsTransportClosed(dtlsTransport);
 }
 
-void WebRtcPusher::onRtcpBye(){
+void WebRtcPusher::onRtcpBye() {
      WebRtcTransportImp::onRtcpBye();
 }
 
+void WebRtcPusher::onShutdown(const SockException &ex) {
+     _push_src = nullptr;
+     WebRtcTransportImp::onShutdown(ex);
+}
+
 }// namespace mediakit
\ No newline at end of file

webrtc/WebRtcPusher.h

@@ -23,15 +23,17 @@ public:
     static Ptr create(const EventPoller::Ptr &poller, const RtspMediaSource::Ptr &src,
                       const std::shared_ptr<void> &ownership, const MediaInfo &info, const ProtocolOption &option, bool preferred_tcp = false);
 
+
 protected:
     ///////WebRtcTransportImp override///////
     void onStartWebRTC() override;
     void onDestory() override;
     void onRtcConfigure(RtcConfigure &configure) const override;
     void onRecvRtp(MediaTrack &track, const std::string &rid, RtpPacket::Ptr rtp) override;
+    void onShutdown(const SockException &ex) override;
     void onRtcpBye() override;
     ////  dtls相关的回调 ////
-   void OnDtlsTransportClosed(const RTC::DtlsTransport *dtlsTransport) override;
+    void OnDtlsTransportClosed(const RTC::DtlsTransport *dtlsTransport) override;
 
 protected:
     ///////MediaSourceEvent override///////