github.com/pion/webrtc/v3@v3.2.24/examples/broadcast/jsfiddle/demo.js (about)

     1  /* eslint-env browser */
     2  
     3  // SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
     4  // SPDX-License-Identifier: MIT
     5  
     6  const log = msg => {
     7    document.getElementById('logs').innerHTML += msg + '<br>'
     8  }
     9  
    10  window.createSession = isPublisher => {
    11    const pc = new RTCPeerConnection({
    12      iceServers: [
    13        {
    14          urls: 'stun:stun.l.google.com:19302'
    15        }
    16      ]
    17    })
    18    pc.oniceconnectionstatechange = e => log(pc.iceConnectionState)
    19    pc.onicecandidate = event => {
    20      if (event.candidate === null) {
    21        document.getElementById('localSessionDescription').value = btoa(JSON.stringify(pc.localDescription))
    22      }
    23    }
    24  
    25    if (isPublisher) {
    26      navigator.mediaDevices.getUserMedia({ video: true, audio: false })
    27        .then(stream => {
    28          stream.getTracks().forEach(track => pc.addTrack(track, stream))
    29          document.getElementById('video1').srcObject = stream
    30          pc.createOffer()
    31            .then(d => pc.setLocalDescription(d))
    32            .catch(log)
    33        }).catch(log)
    34    } else {
    35      pc.addTransceiver('video')
    36      pc.createOffer()
    37        .then(d => pc.setLocalDescription(d))
    38        .catch(log)
    39  
    40      pc.ontrack = function (event) {
    41        const el = document.getElementById('video1')
    42        el.srcObject = event.streams[0]
    43        el.autoplay = true
    44        el.controls = true
    45      }
    46    }
    47  
    48    window.startSession = () => {
    49      const sd = document.getElementById('remoteSessionDescription').value
    50      if (sd === '') {
    51        return alert('Session Description must not be empty')
    52      }
    53  
    54      try {
    55        pc.setRemoteDescription(JSON.parse(atob(sd)))
    56      } catch (e) {
    57        alert(e)
    58      }
    59    }
    60  
    61    window.copySDP = () => {
    62      const browserSDP = document.getElementById('localSessionDescription')
    63  
    64      browserSDP.focus()
    65      browserSDP.select()
    66  
    67      try {
    68        const successful = document.execCommand('copy')
    69        const msg = successful ? 'successful' : 'unsuccessful'
    70        log('Copying SDP was ' + msg)
    71      } catch (err) {
    72        log('Unable to copy SDP ' + err)
    73      }
    74    }
    75  
    76    const btns = document.getElementsByClassName('createSessionButton')
    77    for (let i = 0; i < btns.length; i++) {
    78      btns[i].style = 'display: none'
    79    }
    80  
    81    document.getElementById('signalingContainer').style = 'display: block'
    82  }