feature: release media from freeswitch

data/rtp-transcoding.json

@@ -3,5 +3,6 @@
   "DTLS": "off",
   "SDES": "off",
   "ICE": "remove",
+  "flags": ["media handover", "port latching"],
   "rtcp-mux": ["demux"]
 }

data/srtp-transcoding.json

@@ -3,7 +3,7 @@
     "transport-protocol": "UDP/TLS/RTP/SAVPF",
     "ICE": "force",
     "SDES": "off",
-    "flags": ["generate mid", "SDES-no", "media handover"],
+    "flags": ["generate mid", "SDES-no", "media handover", "port latching"],
     "rtcp-mux": ["require"]  
   },
   "teams": {

lib/call-session.js

@@ -391,7 +391,17 @@ class CallSession extends Emitter {
         res.send(488);
         throw new Error(`_onReinvite: rtpengine failed: offer: ${JSON.stringify(response)}`);
       }
-      const sdp = await dlg.other.modify(response.sdp);
+
+      /* if this is a re-invite from the FS to change media anchoring, avoid sending the reinvite out */
+      let sdp;
+      const reason = req.get('X-Reason');
+      if (reason && dlg.type === 'uas' && ['release-media', 'anchor-media'].includes(reason)) {
+        this.logger.info(`got a reinvite from FS to ${reason}`);
+        sdp = dlg.other.remote.sdp;
+      }
+      else {
+        sdp = await dlg.other.modify(response.sdp);
+      }
       opts = {
         ...this.rtpEngineOpts.common,
         ...answerMedia,

package.json

@@ -35,7 +35,7 @@
     "@jambonz/time-series": "^0.1.5",
     "debug": "^4.3.1",
     "drachtio-fn-b2b-sugar": "^0.0.12",
-    "drachtio-srf": "^4.4.49",
+    "drachtio-srf": "^4.4.55",
     "pino": "^6.11.2"
   },
   "devDependencies": {