mirror of
https://github.com/bluenviron/mediamtx
synced 2025-01-22 06:53:40 +00:00
374 lines
7.6 KiB
HTML
374 lines
7.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width">
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<style>
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html, body {
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margin: 0;
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padding: 0;
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height: 100%;
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font-family: 'Arial', sans-serif;
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}
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#video {
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background: rgb(30, 30, 30);
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}
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#message {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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display: flex;
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align-items: center;
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text-align: center;
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justify-content: center;
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font-size: 16px;
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font-weight: bold;
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color: white;
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pointer-events: none;
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padding: 20px;
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box-sizing: border-box;
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text-shadow: 0 0 5px black;
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}
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</style>
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</head>
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<body>
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<video id="video"></video>
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<div id="message"></div>
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<script>
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const retryPause = 2000;
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const video = document.getElementById('video');
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const message = document.getElementById('message');
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let pc = null;
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let restartTimeout = null;
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let sessionUrl = '';
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let offerData = '';
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let queuedCandidates = [];
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let defaultControls = false;
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const setMessage = (str) => {
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if (str !== '') {
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video.controls = false;
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} else {
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video.controls = defaultControls;
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}
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message.innerText = str;
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};
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const unquoteCredential = (v) => (
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JSON.parse(`"${v}"`)
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);
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const linkToIceServers = (links) => (
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(links !== null) ? links.split(', ').map((link) => {
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const m = link.match(/^<(.+?)>; rel="ice-server"(; username="(.*?)"; credential="(.*?)"; credential-type="password")?/i);
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const ret = {
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urls: [m[1]],
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};
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if (m[3] !== undefined) {
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ret.username = unquoteCredential(m[3]);
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ret.credential = unquoteCredential(m[4]);
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ret.credentialType = 'password';
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}
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return ret;
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}) : []
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);
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const parseOffer = (offer) => {
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const ret = {
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iceUfrag: '',
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icePwd: '',
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medias: [],
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};
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for (const line of offer.split('\r\n')) {
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if (line.startsWith('m=')) {
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ret.medias.push(line.slice('m='.length));
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} else if (ret.iceUfrag === '' && line.startsWith('a=ice-ufrag:')) {
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ret.iceUfrag = line.slice('a=ice-ufrag:'.length);
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} else if (ret.icePwd === '' && line.startsWith('a=ice-pwd:')) {
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ret.icePwd = line.slice('a=ice-pwd:'.length);
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}
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}
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return ret;
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};
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const enableStereoOpus = (section) => {
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let opusPayloadFormat = '';
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let lines = section.split('\r\n');
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for (let i = 0; i < lines.length; i++) {
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if (lines[i].startsWith('a=rtpmap:') && lines[i].toLowerCase().includes('opus/')) {
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opusPayloadFormat = lines[i].slice('a=rtpmap:'.length).split(' ')[0];
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break;
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}
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}
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if (opusPayloadFormat === '') {
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return section;
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}
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for (let i = 0; i < lines.length; i++) {
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if (lines[i].startsWith('a=fmtp:' + opusPayloadFormat + ' ')) {
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if (!lines[i].includes('stereo')) {
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lines[i] += ';stereo=1';
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}
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if (!lines[i].includes('sprop-stereo')) {
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lines[i] += ';sprop-stereo=1';
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}
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}
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}
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return lines.join('\r\n');
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};
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const editOffer = (offer) => {
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const sections = offer.sdp.split('m=');
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for (let i = 0; i < sections.length; i++) {
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const section = sections[i];
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if (section.startsWith('audio')) {
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sections[i] = enableStereoOpus(section);
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}
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}
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offer.sdp = sections.join('m=');
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};
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const generateSdpFragment = (od, candidates) => {
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const candidatesByMedia = {};
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for (const candidate of candidates) {
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const mid = candidate.sdpMLineIndex;
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if (candidatesByMedia[mid] === undefined) {
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candidatesByMedia[mid] = [];
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}
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candidatesByMedia[mid].push(candidate);
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}
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let frag = 'a=ice-ufrag:' + od.iceUfrag + '\r\n'
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+ 'a=ice-pwd:' + od.icePwd + '\r\n';
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let mid = 0;
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for (const media of od.medias) {
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if (candidatesByMedia[mid] !== undefined) {
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frag += 'm=' + media + '\r\n'
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+ 'a=mid:' + mid + '\r\n';
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for (const candidate of candidatesByMedia[mid]) {
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frag += 'a=' + candidate.candidate + '\r\n';
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}
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}
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mid++;
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}
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return frag;
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};
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const loadStream = () => {
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requestICEServers();
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};
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const onError = (err) => {
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if (restartTimeout === null) {
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setMessage(err + ', retrying in some seconds');
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if (pc !== null) {
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pc.close();
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pc = null;
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}
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restartTimeout = window.setTimeout(() => {
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restartTimeout = null;
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loadStream();
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}, retryPause);
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if (sessionUrl) {
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fetch(sessionUrl, {
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method: 'DELETE',
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});
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}
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sessionUrl = '';
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queuedCandidates = [];
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}
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};
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const sendLocalCandidates = (candidates) => {
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fetch(sessionUrl + window.location.search, {
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method: 'PATCH',
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headers: {
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'Content-Type': 'application/trickle-ice-sdpfrag',
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'If-Match': '*',
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},
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body: generateSdpFragment(offerData, candidates),
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})
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.then((res) => {
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switch (res.status) {
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case 204:
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break;
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case 404:
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throw new Error('stream not found');
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default:
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throw new Error(`bad status code ${res.status}`);
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}
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})
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.catch((err) => {
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onError(err.toString());
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});
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};
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const onLocalCandidate = (evt) => {
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if (restartTimeout !== null) {
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return;
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}
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if (evt.candidate !== null) {
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if (sessionUrl === '') {
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queuedCandidates.push(evt.candidate);
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} else {
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sendLocalCandidates([evt.candidate])
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}
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}
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};
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const onRemoteAnswer = (sdp) => {
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if (restartTimeout !== null) {
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return;
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}
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pc.setRemoteDescription(new RTCSessionDescription({
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type: 'answer',
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sdp,
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}));
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if (queuedCandidates.length !== 0) {
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sendLocalCandidates(queuedCandidates);
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queuedCandidates = [];
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}
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};
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const sendOffer = (offer) => {
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fetch(new URL('whep', window.location.href) + window.location.search, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/sdp',
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},
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body: offer.sdp,
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})
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.then((res) => {
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switch (res.status) {
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case 201:
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break;
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case 404:
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throw new Error('stream not found');
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default:
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throw new Error(`bad status code ${res.status}`);
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}
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sessionUrl = new URL(res.headers.get('location'), window.location.href).toString();
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return res.text();
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})
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.then((sdp) => onRemoteAnswer(sdp))
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.catch((err) => {
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onError(err.toString());
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});
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};
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const createOffer = () => {
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pc.createOffer()
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.then((offer) => {
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editOffer(offer);
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offerData = parseOffer(offer.sdp);
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pc.setLocalDescription(offer);
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sendOffer(offer);
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});
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};
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const onConnectionState = () => {
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if (restartTimeout !== null) {
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return;
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}
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if (pc.iceConnectionState === 'disconnected') {
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onError('peer connection disconnected');
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}
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};
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const onTrack = (evt) => {
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setMessage('');
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video.srcObject = evt.streams[0];
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};
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const requestICEServers = () => {
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fetch(new URL('whep', window.location.href) + window.location.search, {
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method: 'OPTIONS',
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})
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.then((res) => {
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pc = new RTCPeerConnection({
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iceServers: linkToIceServers(res.headers.get('Link')),
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// https://webrtc.org/getting-started/unified-plan-transition-guide
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sdpSemantics: 'unified-plan',
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});
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const direction = 'sendrecv';
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pc.addTransceiver('video', { direction });
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pc.addTransceiver('audio', { direction });
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pc.onicecandidate = (evt) => onLocalCandidate(evt);
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pc.oniceconnectionstatechange = () => onConnectionState();
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pc.ontrack = (evt) => onTrack(evt);
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createOffer();
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})
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.catch((err) => {
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onError(err.toString());
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});
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};
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const parseBoolString = (str, defaultVal) => {
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str = (str || '');
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if (['1', 'yes', 'true'].includes(str.toLowerCase())) {
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return true;
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}
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if (['0', 'no', 'false'].includes(str.toLowerCase())) {
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return false;
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}
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return defaultVal;
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};
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const loadAttributesFromQuery = () => {
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const params = new URLSearchParams(window.location.search);
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video.controls = parseBoolString(params.get('controls'), true);
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video.muted = parseBoolString(params.get('muted'), true);
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video.autoplay = parseBoolString(params.get('autoplay'), true);
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video.playsInline = parseBoolString(params.get('playsinline'), true);
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defaultControls = video.controls;
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};
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const init = () => {
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loadAttributesFromQuery();
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loadStream();
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};
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window.addEventListener('DOMContentLoaded', init);
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</script>
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</body>
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</html>
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