ConfigureFlexFEC03 helper and fec example

examples/play-from-disk-fec/jsfiddle/demo.js

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+/* eslint-env browser */
+
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+const pc = new RTCPeerConnection({
+  iceServers: [
+    {
+      urls: 'stun:stun.l.google.com:19302'
+    }
+  ]
+})
+const log = (msg) => {
+  document.getElementById('div').innerHTML += msg + '<br>'
+}
+
+pc.ontrack = function (event) {
+  const el = document.createElement(event.track.kind)
+  el.srcObject = event.streams[0]
+  el.autoplay = true
+  el.controls = true
+
+  document.getElementById('remoteVideos').appendChild(el)
+}
+
+pc.oniceconnectionstatechange = (e) => log(pc.iceConnectionState)
+pc.onicecandidate = (event) => {
+  if (event.candidate === null) {
+    document.getElementById('localSessionDescription').value = btoa(
+      JSON.stringify(pc.localDescription)
+    )
+  }
+}
+
+window.startSession = () => {
+  const sd = document.getElementById('remoteSessionDescription').value
+  if (sd === '') {
+    return alert('Session Description must not be empty')
+  }
+
+  try {
+    // Set the remote offer
+    pc.setRemoteDescription(JSON.parse(atob(sd)))
+      .then(() => {
+        // Create answer
+        return pc.createAnswer()
+      })
+      .then((answer) => {
+        // Set local description with the answer
+        return pc.setLocalDescription(answer)
+      })
+      .catch(log)
+  } catch (e) {
+    alert(e)
+  }
+}
+
+window.copySessionDescription = () => {
+  const browserSessionDescription = document.getElementById(
+    'localSessionDescription'
+  )
+
+  browserSessionDescription.focus()
+  browserSessionDescription.select()
+
+  try {
+    const successful = document.execCommand('copy')
+    const msg = successful ? 'successful' : 'unsuccessful'
+    log('Copying SessionDescription was ' + msg)
+  } catch (err) {
+    log('Oops, unable to copy SessionDescription ' + err)
+  }
+}