add srt push string

src/Common/MediaSource.cpp

@@ -38,6 +38,7 @@ string getOriginTypeString(MediaOriginType type){
         SWITCH_CASE(mp4_vod);
         SWITCH_CASE(device_chn);
         SWITCH_CASE(rtc_push);
+        SWITCH_CASE(srt_push);
         default : return "unknown";
     }
 }