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Update SVC sample to use the MediaCapabilities API #1595

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Merged
merged 1 commit into from
Mar 10, 2023
Merged

Update SVC sample to use the MediaCapabilities API #1595

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63 changes: 55 additions & 8 deletions src/content/extensions/svc/js/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,37 @@ const scalabilityMode = document.querySelector('#scalabilityMode');
const supportsSetCodecPreferences = window.RTCRtpTransceiver &&
'setCodecPreferences' in window.RTCRtpTransceiver.prototype;

const scalabilityModes = [
'L1T1',
'L1T2',
'L1T3',
'L2T1',
'L2T2',
'L2T3',
'L3T1',
'L3T2',
'L3T3',
'L2T1h',
'L2T2h',
'L2T3h',
'S2T1',
'S2T2',
'S2T3',
'S2T1h',
'S2T2h',
'S2T3h',
'S3T1',
'S3T2',
'S3T3',
'S3T1h',
'S3T2h',
'S3T3h',
'L2T2_KEY',
'L2T3_KEY',
'L3T2_KEY',
'L3T3_KEY'
];

let localStream;
let pc1;
let pc2;
Expand Down Expand Up @@ -94,24 +125,40 @@ async function start() {
option.innerText = option.value;
codecPreferences.appendChild(option);
});
codecPreferences.addEventListener('change', (event) => {
const [mimeType, sdpFmtpLine] = event.target.value.split(' ');
const selectedCodecIndex = codecs.findIndex(c => c.mimeType === mimeType && c.sdpFmtpLine === sdpFmtpLine);
const selectedCodec = codecs[selectedCodecIndex];
codecPreferences.addEventListener('change', async (event) => {
const [mimeType] = event.target.value.split(' ');
while (scalabilityMode.firstChild) {
scalabilityMode.firstChild.remove();
}
const option = document.createElement('option');
option.value = '';
option.innerText = 'NONE';
scalabilityMode.appendChild(option);
if (selectedCodec.scalabilityModes) {
for (const mode of selectedCodec.scalabilityModes) {

const capabilityPromises = [];
for (const mode of scalabilityModes) {
capabilityPromises.push(navigator.mediaCapabilities.encodingInfo({
type: 'webrtc',
video: {
contentType: mimeType,
width: 640,
height: 480,
bitrate: 10000,
framerate: 29.97,
scalabilityMode: mode
}}));
}
const capabilityResults = await Promise.all(capabilityPromises);
for (let i = 0; i < scalabilityModes.length; ++i) {
if (capabilityResults[i].supported) {
const option = document.createElement('option');
option.value = mode;
option.innerText = mode;
option.value = scalabilityModes[i];
option.innerText = scalabilityModes[i];
scalabilityMode.appendChild(option);
}
}

if (scalabilityMode.childElementCount > 1) {
scalabilityMode.disabled = false;
} else {
scalabilityMode.disabled = true;
Expand Down