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simulcast-playground.html
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simulcast-playground.html
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<html>
<head>
<title>WebRTC Playground</title>
<meta charset="UTF-8">
<style>
body {
font-family: monospace;
line-height: 2em;
}
.encodingBox {
display: inline-block;
border: 1px solid black;
margin: 5px 5px 5px 5px;
padding: 5px 5px 5px 5px;
max-width: 90%;
}
video {
max-width: 600px;
}
button, input, select {
font-family: inherit;
}
summary {
font-weight: bold;
}
.VideoPlayer {
position: relative;
}
.VideoPlayer button {
color: darkgray;
border-width: medium;
border-color: white;
border-style: hidden;
background-color: transparent;
text-shadow:
1px 1px 1px #000,
-1px 1px 1px #000,
-1px -1px 0 #000,
1px -1px 0 #000;
font-size: 1.8em;
line-height: 1.5em;
vertical-align: middle;
filter: drop-shadow(2px 4px 6px black)
}
.VideoPlayer button:hover {
color: white;
}
.RecordButton {
font-size: 1em !important;
}
.RecordButton:hover {
filter: brightness(1.2) drop-shadow(2px 4px 6px black);
}
.VideoPlayerControls {
position:absolute;
z-index: 1;
bottom: 0px;
right: 0px;
margin-right:5px;
}
#recordingList {
margin-left: 10px;
}
.blink {
animation: blink 1s linear infinite;
}
@keyframes blink {
25% {
opacity: 0.5;
}
50% {
opacity: 0;
}
75% {
opacity: 0.5;
}
}
</style>
</head>
<body>
<table>
<tr>
<td>
<div class="VideoPlayer">
<video id="videoSource" autoplay muted></video>
<div class="VideoPlayerControls">
<button onclick="javascript:videoFullscreen(this)" title="Fullscreen">⛶</button>
</div>
</div>
</td>
<td>
<div class="VideoPlayer" style="display: none">
<video id="videoMerged" autoplay></video>
<div class="VideoPlayerControls">
<button class="RecordButton" onclick="javascript:videoRecord(this)" title="Record">🔴</button>
<button onclick="javascript:videoFullscreen(this)" title="Fullscreen">⛶</button>
</div>
</div>
</td>
</tr>
<tr>
<td>
<span id="videoSourceSize">0x0</span>
<span id="videoSourceFps">0</span> fps
</td>
<td>
<span id="videoMergedSize">0x0</span>
<span id="videoMergedFps">0</span> fps
</td>
</tr>
<tr>
<td id="videoSourceBps">0 bps</td>
<td id="videoMergedBps">0 bps</td>
</tr>
</table>
<button id="start">Start</button>
<button id="stop">Stop</button> |
<button id="copyBookmark">Copy Bookmark</button>
<button id="copyBookmarkWithDevice">Copy Bookmark (+device)</button>
<br />
Source:
<select id="captureDevice">
<option value="default">Default Device</option>
</select>
<select id="resolution">
<optgroup label="User Media">
<option value="WHQVGA">240x135 (WHQVGA)</option>
<option value="WQVGA">320x180 (WQVGA)</option>
<option value="QVGA">320x240 (QVGA)</option>
<option value="WHVGA">480x270 (WHVGA)</option>
<option value="HVGA">480x360 (HVGA)</option>
<option value="WVGA">640x360 (WVGA)</option>
<option value="VGA">640x480 (VGA)</option>
<option value="HD" selected>1280x720 (HD)</option>
<option value="FullHD">1920x1080 (FullHD)</option>
<option value="4K">4096x2160 (4K)</option>
<option value="8K">7680x4320 (8K)</option>
</optgroup>
<optgroup label="Display Media">
<option value="screen">Screen</option>
<option value="screen-FullHD">Screen (FullHD)</option>
<option value="screen-HD">Screen (HD)</option>
</optgroup>
<optgroup label="Display Media / Conference">
<option value="screen-conference">Screen (conference)</option>
<option value="screen-conference-FullHD">
Screen (FullHD, conference)
</option>
<option value="screen-conference-HD">Screen (HD, conference)</option>
</optgroup>
</select>
<select id="captureFramerate">
<option value="5">5 FPS</option>
<option value="10">10 FPS</option>
<option value="12">12 FPS</option>
<option value="15">15 FPS</option>
<option value="20">20 FPS</option>
<option value="24">24 FPS</option>
<option value="30" selected>30 FPS</option>
<option value="60">60 FPS</option>
</select>
<select id="contentHint">
<option value="">No Hint</option>
<option value="motion">Motion</option>
<option value="detail">Detail</option>
<option value="text">Text</option>
</select>
<br />
Transceiver:
<select id="codec">
<option value="VP8">VP8</option>
<option value="VP9">VP9</option>
<option value="AV1">AV1</option>
<option value="H264">H264</option>
</select> |
Sender:
<button id="getParameters">Get Parameters</button>
<button id="setParameters">Set Parameters</button> | Receiver:
<button id="receiverGetParameters">Get Parameters</button>
<br />
Simulcast:
<button id="addLayer">Add layer</button>
<button id="removeLayer">Remove layer</button> | Layers:
<select id="splitLayer">
<option value="merged">Merged</option>
<option value="split">Split</option>
</select>
<br />
<label
>Degradation Preference:
<select id="degradationPreference">
<option value="" selected>None</option>
<option value="balanced">Balanced</option>
<option value="maintain-framerate">Maintain framerate</option>
<option value="maintain-resolution">Maintain resolution</option>
</select>
</label>
<br />
<div class="encodingBox" data-layer="0">
Layer
<span id="layerId">0</span> <span id="videoSize">0x0</span>
<span id="videoFps">0</span> fps
<br />
<div id="videoPreview" class="VideoPlayer" style="display: none">
<video id="video" autoplay muted></video>
<div class="VideoPlayerControls">
<button class="RecordButton" onclick="javascript:videoRecord(this)" title="Record">🔴</button>
<button onclick="javascript:videoFullscreen(this)" title="Fullscreen">⛶</button>
</div>
</div>
<details open>
<summary>Encoder settings</summary>
<label
>codec:
<select id="forceCodec" style="width: 10em">
<option value="">None</option>
</select>
</label>
<br />
<label
>maxBitrate (bps):
<input type="number" id="maxBitrate" value="3000000" size="8" style="width: 8em;" />
</label>
<br />
<label
>scaleResolutionDownBy:
<input type="number" id="scaleResolutionDownBy" value="1" size="3" style="width: 5em;" />
</label>
<br />
<label
>maxFramerate (fps):
<input type="number" id="maxFramerate" value="60" size="3" style="width: 7em;" />
</label>
<br />
<label
>scalabilityMode:
<select id="scalabilityMode" style="width: 9em;">
<option value="">None</option>
<option value="L1T1">L1T1</option>
<option value="L1T2">L1T2</option>
<option value="L1T3">L1T3</option>
<option value="L2T1">L2T1</option>
<option value="L2T1h">L2T1h</option>
<option value="L2T1_KEY">L2T1_KEY</option>
<option value="L2T2">L2T2</option>
<option value="L2T2h">L2T2h</option>
<option value="L2T2_KEY">L2T2_KEY</option>
<option value="L2T2_KEY_SHIFT">L2T2_KEY_SHIFT</option>
<option value="L2T3">L2T3</option>
<option value="L2T3h">L2T3h</option>
<option value="L2T3_KEY">L2T3_KEY</option>
<option value="L2T3_KEY_SHIFT">L2T3_KEY_SHIFT</option>
<option value="L3T1">L3T1</option>
<option value="L3T1h">L3T1h</option>
<option value="L3T1_KEY">L3T1_KEY</option>
<option value="L3T2">L3T2</option>
<option value="L3T2h">L3T2h</option>
<option value="L3T2_KEY">L3T2_KEY</option>
<option value="L3T2_KEY_SHIFT">L3T2_KEY_SHIFT</option>
<option value="L3T3">L3T3</option>
<option value="L3T3h">L3T3h</option>
<option value="L3T3_KEY">L3T3_KEY</option>
<option value="L3T3_KEY_SHIFT">L3T3_KEY_SHIFT</option>
<option value="S2T1">S2T1</option>
<option value="S2T1h">S2T1h</option>
<option value="S2T2">S2T2</option>
<option value="S2T2h">S2T2h</option>
<option value="S2T3">S2T3</option>
<option value="S2T3h">S2T3h</option>
<option value="S3T1">S3T1</option>
<option value="S3T1h">S3T1h</option>
<option value="S3T2">S3T2</option>
<option value="S3T2h">S3T2h</option>
<option value="S3T3">S3T3</option>
<option value="S3T3h">S3T3h</option>
</select>
</label>
<br />
<label
>Active:
<select id="active">
<option value="on">On</option>
<option value="off">Off</option>
</select>
</label>
<br />
<label
>priority:
<select id="priority">
<option value="very-low">Very Low</option>
<option value="low" selected>Low</option>
<option value="medium">Medium</option>
<option value="high">High</option>
</select>
</label>
</details>
<details>
<summary>Encoder stats</summary>
<span id="stats">No stats available yet.</span>
</details>
</div>
<br />
<div id="recordingListBox" style="display: none">
<details open>
<summary>Recordings</summary>
<div id="recordingList">
</div>
</details>
</div>
<div id="div"></div>
<script>
const constraints = {
'WHQVGA': {
video: {
width: 240,
height: 135,
},
},
'WQVGA': {
video: {
width: 320,
height: 180,
},
},
'QVGA': {
video: {
width: 320,
height: 240,
},
},
'WHVGA': {
video: {
width: 480,
height: 270,
},
},
'HVGA': {
video: {
width: 480,
height: 360,
},
},
'WVGA': {
video: {
width: 640,
height: 360,
},
},
'VGA': {
video: {
width: 640,
height: 480,
},
},
'HD': {
video: {
width: 1280,
height: 720,
},
},
'FullHD': {
video: {
width: 1920,
height: 1080,
},
},
'4K': {
video: {
width: 4096,
height: 2160,
},
},
'8K': {
video: {
width: 7680,
height: 4320,
},
},
'screen': {
video: true,
},
'screen-FullHD': {
video: {width: {max: 1920}},
},
'screen-HD': {
video: {width: {max: 1280}},
},
'screen-conference': {
video: true,
},
'screen-conference-FullHD': {
video: {width: {max: 1920}},
},
'screen-conference-HD': {
video: {width: {max: 1280}},
},
};
let pc1;
let pc2;
let stream;
let transceiver;
let sender;
let asender;
let lastBitrateMesurementTime;
let lastBytesSent;
let lastBytesReceived;
let streamResolution;
let bookmarkDevice;
let prevReport = null;
const intervals = [];
let videoSourceInterval = null;
const recorders = {};
const recordings = [];
const stopPeerConnection = () => {
if (pc1) {
pc1.close();
}
if (pc2) {
videoMerged.srcObject = null;
pc2.close();
}
const layers = document.querySelectorAll('div[data-layer]');
for (const layer of layers) {
layer.querySelector('#videoPreview').style.display = 'none';
}
videoMerged.closest(".VideoPlayer").style.display = splitLayer.value == 'merged' ? "inline" : "none";
for (const interval of intervals) {
window.clearInterval(interval);
}
intervals.length = 0;
};
const removeTilde = (r) => r.startsWith('~') ? r.substring(1) : r;
const setupPeerConnection = async () => {
stopPeerConnection();
pc1 = new RTCPeerConnection({
sdpSemantics: 'unified-plan',
});
pc2 = new RTCPeerConnection({
sdpSemantics: 'unified-plan',
});
const refreshEncodingStats = (currReport) => {
const encodings = sender.getParameters().encodings;
for (let layerId = 0; layerId < encodings.length; ++layerId) {
const statsSpan = document.querySelector(`div[data-layer="${layerId}"]`).querySelector('#stats');
try {
const currRtp = [...currReport.values()].find(s => {
return s.type == 'outbound-rtp' &&
(s.rid == undefined || s.rid == layerId);
});
document.querySelector(`div[data-layer="${layerId}"]`)
.querySelector('#videoSize').innerText = `${currRtp.frameWidth}x${currRtp.frameHeight}`;
document.querySelector(`div[data-layer="${layerId}"]`)
.querySelector('#videoFps').innerText = `${currRtp.framesPerSecond}`;
const prevRtp =
currRtp && prevReport && prevReport.get(currRtp.id);
if (!currRtp || !prevRtp) {
statsSpan.innerText = "Stats missing";
continue;
}
const deltaSeconds =
(currRtp.timestamp - prevRtp.timestamp) / 1000;
const targetBitrateKbps =
currRtp.targetBitrate ? currRtp.targetBitrate / 1000 : 0;
const encoderKbps =
(delta(currRtp, prevRtp,
s => s.bytesSent - s.retransmittedBytesSent) * 8 / 1000)
/ deltaSeconds;
const avgEncodeTimeMs =
(delta(currRtp, prevRtp, s => s.totalEncodeTime) /
delta(currRtp, prevRtp, s => s.framesEncoded)) * 1000;
const avgQp =
delta(currRtp, prevRtp, s => s.qpSum) /
delta(currRtp, prevRtp, s => s.framesEncoded);
statsSpan.innerText = `${currReport.get(currRtp.codecId).mimeType.substring(6)} (${currRtp.encoderImplementation})
scalabilityMode: ${currRtp.scalabilityMode}
Limitation: ${currRtp.qualityLimitationReason}
Target: ${targetBitrateKbps.toFixed(2)} kbps
Actual: ${encoderKbps.toFixed(2)} kbps
- Avg Enc Time: ${avgEncodeTimeMs.toFixed(2)} ms
- Avg QP: ${avgQp}
- Keyframes: ${currRtp.keyFramesEncoded}`;
} catch (e) {
statsSpan.innerText = e;
}
}
}
const delta = (currStats, prevStats, calc) => {
return calc(currStats) - calc(prevStats);
}
intervals.push(setInterval(async () => {
const currReport = await pc1.getStats();
refreshEncodingStats(currReport);
prevReport = currReport;
}, 1000));
pc1.onicecandidate = (e) => {
if (e.candidate) {
pc2.addIceCandidate(e.candidate);
}
};
pc2.onicecandidate = (e) => {
if (e.candidate) {
pc1.addIceCandidate(e.candidate);
}
};
pc2.ontrack = async (e) => {
if (e.transceiver && e.transceiver.setCodecPreferences) {
// Move the desired codecs in front
const wantedCodecs = RTCRtpReceiver.getCapabilities(
'video'
).codecs.filter((c) => c.mimeType.includes(codec.value));
const otherCodecs = RTCRtpReceiver.getCapabilities("video").codecs.filter(
(c) => !c.mimeType.includes(codec.value)
);
e.transceiver.setCodecPreferences(wantedCodecs.concat(otherCodecs));
}
try {
if (splitLayer.value == 'merged') {
intervals.push(setStream(
videoMerged,
videoMergedSize,
videoMergedFps,
e.streams[0],
));
} else {
console.log(
'Got stream with id:' +
e.streams[0].id +
' and track id:' +
e.streams[0].getTracks()[0].id,
);
const streamId = e.streams[0].id;
const layerId = isNaN(Number(streamId)) ? 0 : streamId;
const div = document.querySelector(
'div[data-layer="' + layerId + '"]',
);
div.querySelector('#videoPreview').style.display = 'inline';
div.querySelector('video').srcObject = e.streams[0];
}
intervals.push(
setInterval(async () => {
const [s1, s2] = await Promise.all([
pc1.getStats(),
pc2.getStats(),
]);
const currentTime = performance.now();
const deltaTime = currentTime - lastBitrateMesurementTime;
// FIXME: Instead of picking a random RTP stream, aggregate
// the bytesSent for all RTP streams.
const bytesSent = findStat(s1, 'outbound-rtp').bytesSent;
let bytesReceived;
try {
bytesReceived = findStat(s2, 'inbound-rtp').bytesReceived;
} catch (e) {}
videoSourceBps.textContent =
(
((bytesSent - lastBytesSent) / deltaTime) *
1000 *
8
).toFixed(0) + ' bps';
videoMergedBps.textContent =
(
((bytesReceived - lastBytesReceived) / deltaTime) *
1000 *
8
).toFixed(0) + ' bps';
lastBitrateMesurementTime = currentTime;
lastBytesSent = bytesSent;
lastBytesReceived = bytesReceived;
}, 1000),
);
} catch (e) {
log(e);
}
};
pc1.oniceconnectionstatechange = (e) => log(pc1.iceConnectionState);
pc1.onnegotiationneeded = async (e) => {
let pc1Offer = await pc1.createOffer();
if (resolution.value.includes('-conference')) {
pc1Offer = addConferenceFlag(pc1Offer);
}
await pc1.setLocalDescription(pc1Offer);
const pc2Offer = {
type: 'offer',
sdp: pc1.localDescription.sdp,
};
if (splitLayer.value == 'split') {
if (pc1Offer.sdp.includes('a=simulcast:')) {
splitUnifiedPlanOffer(pc2Offer);
}
}
console.log('pc2 offer: ' + pc2Offer.sdp);
await pc2.setRemoteDescription(pc2Offer);
const answer = await pc2.createAnswer();
await pc2.setLocalDescription(answer);
let pc1Answer = {
type: 'answer',
sdp: pc2.localDescription.sdp,
};
if (splitLayer.value == 'split') {
if (pc1Offer.sdp.includes('a=simulcast:')) {
splitUnifiedPlanAnswer(pc1Answer);
}
}
if (resolution.value.includes('-conference')) {
pc1Answer = addConferenceFlag(pc1Answer);
}
console.log('pc1 answer: ' + pc1Answer.sdp);
await pc1.setRemoteDescription(pc1Answer);
};
const params = readParameters();
console.log(JSON.stringify(params, 0, 2));
transceiver = pc1.addTransceiver(stream.getVideoTracks()[0], {
streams: [stream],
sendEncodings: params.encodings,
});
sender = transceiver.sender;
lastBitrateMesurementTime = performance.now();
lastBytesSent = 0;
lastBytesReceived = 0;
};
const splitUnifiedPlanOffer = (offer) => {
let sdpLines = offer.sdp.split('\r\n');
mSectionStart = sdpLines.findIndex((line) => line.startsWith('m='));
mSection = sdpLines.splice(mSectionStart);
const layerRIDS = mSection
.filter((line) => line.startsWith('a=simulcast:'))
.map((line) => line.replace('a=simulcast:send ', '').split(';'))[0];
const midExtmapId = mSection
.filter((line) =>
line.includes('urn:ietf:params:rtp-hdrext:sdes:mid'),
)
.map((line) => line.replace('a=extmap:', '').split(' ')[0])[0];
const ridExtmapId = mSection
.filter((line) =>
line.includes('urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id'),
)
.map((line) => line.replace('a=extmap:', '').split(' ')[0])[0];
sdpLines = sdpLines.map((line) => {
if (line.startsWith('a=group:BUNDLE')) {
return 'a=group:BUNDLE ' + layerRIDS.map(removeTilde).join(' ');
}
return line;
});
for (const layerName of layerRIDS) {
sdpLines = sdpLines.concat(
mSection.map((line) => {
if (line.match(/a=msid:/)) {
return 'a=msid:' + removeTilde(layerName) + ' ' + removeTilde(layerName);
}
if (line.startsWith('a=mid:')) {
return 'a=mid:' + removeTilde(layerName);
}
if (line.startsWith('a=extmap:' + midExtmapId + ' ')) {
return (
'a=extmap:' +
midExtmapId +
' urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id'
);
}
if (line.startsWith('a=extmap:' + ridExtmapId + ' ')) {
return (
'a=extmap:' +
ridExtmapId +
' urn:ietf:params:rtp-hdrext:sdes:mid'
);
}
if (line.startsWith('a=rid:') || line.startsWith('a=simulcast:')) {
return null;
}
return line;
}),
);
}
offer.sdp =
sdpLines.filter((line) => line && line.length > 0).join('\r\n') +
'\r\n';
};
const splitUnifiedPlanAnswer = (answer) => {
let sdpLines = answer.sdp.split('\r\n');
let mSectionStart = sdpLines.findIndex((line) => line.startsWith('m='));
let mSection = sdpLines.splice(mSectionStart);
// Remove extra m= sections
mSectionStart = mSection
.slice(1)
.findIndex((line) => line.startsWith('m='));
if (mSectionStart != -1) {
mSection.splice(mSectionStart + 1);
}
const midExtmapId = mSection
.filter((line) =>
line.includes('urn:ietf:params:rtp-hdrext:sdes:mid'),
)
.map((line) => line.replace('a=extmap:', '').split(' ')[0])[0];
const ridExtmapId = mSection
.filter((line) =>
line.includes('urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id'),
)
.map((line) => line.replace('a=extmap:', '').split(' ')[0])[0];
sdpLines = sdpLines.map((line) => {
if (line.startsWith('a=group:BUNDLE')) {
return 'a=group:BUNDLE 0';
}
return line;
});
mSection = mSection.map((line) => {
if (line.startsWith('a=mid:')) {
return 'a=mid:0';
}
if (line.startsWith('a=extmap:' + midExtmapId + ' ')) {
return (
'a=extmap:' +
midExtmapId +
' urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id'
);
}
if (line.startsWith('a=extmap:' + ridExtmapId + ' ')) {
return (
'a=extmap:' + ridExtmapId + ' urn:ietf:params:rtp-hdrext:sdes:mid'
);
}
return line;
});
const params = readParameters();
for (const [index] of params.encodings.entries()) {
mSection.push('a=rid:' + index + ' recv');
}
mSection.push(
'a=simulcast:recv ' + params.encodings.map((e, k) => (e.active ? '' : '~') + k).join(';'),
);
answer.sdp =
sdpLines
.concat(mSection)
.filter((line) => line && line.length > 0)
.join('\r\n') + '\r\n';
};
const addConferenceFlag = (offer) => {
const sdpLines = offer.sdp.split('\r\n');
sdpLines.push('a=x-google-flag:conference');
offer.sdp =
sdpLines.filter((line) => line && line.length > 0).join('\r\n') +
'\r\n';
return offer;
};
const readParameters = (params) => {
// Can't use getParameters since we need this for addTransceiver too
const divCount = document.querySelectorAll('div[data-layer]').length;
if (!params) {
params = {
encodings: [],
};
for (let i = 0; i < divCount; ++i) {
params.encodings.push({
rid: i,
});
}
}
for (let i = 0; i < divCount; ++i) {
const div = document.querySelector('div[data-layer="' + i + '"]');
params.encodings[i].active =
div.querySelector('#active').value == 'on' ? true : false;
params.encodings[i].priority = div.querySelector('#priority').value;
const maxBitrate = div.querySelector('#maxBitrate').valueAsNumber;
if (isNaN(maxBitrate)) {
params.encodings[i].maxBitrate = undefined;
} else {
params.encodings[i].maxBitrate = maxBitrate;
}
const scaleResolutionDownBy = div.querySelector(
'#scaleResolutionDownBy',
).valueAsNumber;
if (isNaN(scaleResolutionDownBy)) {
params.encodings[i].scaleResolutionDownBy = undefined;
} else {
params.encodings[i].scaleResolutionDownBy = scaleResolutionDownBy;
}
const maxFramerate = div.querySelector('#maxFramerate').valueAsNumber;
if (isNaN(maxFramerate)) {
params.encodings[i].maxFramerate = undefined;
} else {
params.encodings[i].maxFramerate = maxFramerate;
}
const scalabilityMode = div.querySelector('#scalabilityMode').value;
if (scalabilityMode == '') {
params.encodings[i].scalabilityMode = undefined;
} else {
params.encodings[i].scalabilityMode = scalabilityMode;
}
const forceCodec = div.querySelector("#forceCodec").value;
if (forceCodec == "") {
params.encodings[i].codec = undefined;
} else {
params.encodings[i].codec = JSON.parse(forceCodec);
}
}
const degradationPreferenceChoice = document.querySelector(
'#degradationPreference',
).value;
if (degradationPreferenceChoice == '') {
params.degradationPreference = undefined;
} else {
params.degradationPreference = degradationPreferenceChoice;
}
return params;
};
document.querySelector('#start').onclick = async () => {
try {
resolutionName = resolution.value;
if (
stream &&
streamResolution &&
streamResolution != resolutionName
) {
for (const track of stream.getVideoTracks()) {
track.stop();
}
stream = null;
if (videoSourceInterval) {
window.clearInterval(videoSourceInterval);
videoSourceInterval = null;
}
}
if (!stream) {
const constraint = {...constraints[resolutionName]};
constraint.video.frameRate = captureFramerate.value;
if (resolutionName.includes('screen')) {
stream = await navigator.mediaDevices.getDisplayMedia(constraint);
} else {
if (captureDevice.value !== 'default') {
constraint.video.deviceId = {exact: captureDevice.value};
}
stream = await navigator.mediaDevices.getUserMedia(constraint);
}
streamResolution = resolutionName;
stream.getVideoTracks()[0].contentHint = contentHint.value;
videoSourceInterval = setStream(
videoSource,
videoSourceSize,
videoSourceFps,
stream,
);
}
setupPeerConnection();
} catch (e) {
log(e);
}
};
const _serializeSetting = (settingName, settingValue) => {
if (typeof settingValue === 'object') {
return Object.keys(settingValue).map((key) => {
return _serializeSetting(settingName + '.' + key, settingValue[key]);
}).join('&');
}
return encodeURIComponent(settingName) + '=' + (settingValue ? encodeURIComponent(settingValue) : '');
};
const serializeSettings = (includeDeviceId) => {
const settings = {
'resolution': resolution.value,
'captureFramerate': captureFramerate.value,
'codec': codec.value,
'contentHint': contentHint.value,
'encodings': readParameters().encodings,
'degradationPreference': degradationPreference.value,
'splitLayer': splitLayer.value,
};
if (includeDeviceId) {
settings['device'] = captureDevice.value;
}
const queryString = Object.keys(settings).map((key) => {
return _serializeSetting(key, settings[key]);
}).join('&');
console.log('Parameter string: ' + queryString);
return queryString;
};
const restoreSettings = (queryString) => {
const params = new URLSearchParams(queryString);
resolution.value = params.get('resolution');
bookmarkDevice = params.get('device');
captureFramerate.value = params.get('captureFramerate');
codec.value = params.get('codec');
contentHint.value = params.get('contentHint');
degradationPreference.value = params.get('degradationPreference');
splitLayer.value = params.get('splitLayer');
const divs = document.querySelectorAll('div[data-layer]');
const divCount = divs.length;
for (let i = 0; params.has('encodings.' + i + '.rid'); ++i) {
if (i + 1 > divCount) {
document.querySelector('#addLayer').click();
}
const div = document.querySelector('div[data-layer="' + i + '"]');
div.querySelector('#maxBitrate').value = params.get('encodings.' + i + '.maxBitrate');
div.querySelector('#scaleResolutionDownBy').value = params.get('encodings.' + i + '.scaleResolutionDownBy');
div.querySelector('#maxFramerate').value = params.get('encodings.' + i + '.maxFramerate');
div.querySelector('#scalabilityMode').value = params.get('encodings.' + i + '.scalabilityMode') ?? 'none';
div.querySelector('#active').value = params.get('encodings.' + i + '.active') == 'true' ? 'on' : 'off';
div.querySelector('#priority').value = params.get('encodings.' + i + '.priority');
const codecObject = {
clockRate: parseInt(params.get('encodings.' + i + '.codec.clockRate')),
mimeType: params.get('encodings.' + i + '.codec.mimeType'),
sdpFmtpLine: params.get('encodings.' + i + '.codec.sdpFmtpLine') ?? undefined,
};
for (const option of div.querySelector('#forceCodec').options) {
if (option.value === '') continue;
const optionCodec = JSON.parse(option.value);
if (optionCodec.mimeType !== codecObject.mimeType) continue;
if (optionCodec.clockRate !== codecObject.clockRate) continue;
if (optionCodec.sdpFmtpLine !== codecObject.sdpFmtpLine) continue;
div.querySelector('#forceCodec').value = JSON.stringify(codecObject);