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Implement filters.
No user interface yet.
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1 changed files with 85 additions and 2 deletions
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@ -83,6 +83,7 @@ function getUserPass() {
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* @property {boolean} [activityDetection]
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* @property {Array.<number>} [resolution]
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* @property {boolean} [blackboardMode]
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* @property {string} [filter]
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*/
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/** @type{settings} */
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@ -777,6 +778,70 @@ async function setMaxVideoThroughput(c, bps) {
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}
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}
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/**
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* @constructor
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*/
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function Filter(stream, f) {
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/** @type {MediaStream} */
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this.input = stream;
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/** @type {(this: Filter, src: HTMLElement, dest: HTMLCanvasElement) => void} */
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this.f = f;
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/** @type {HTMLVideoElement} */
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this.video = document.createElement('video');
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/** @type {HTMLCanvasElement} */
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this.canvas = document.createElement('canvas');
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/** @type {MediaStream} */
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this.captureStream = null;
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/** @type {MediaStream} */
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this.outputStream = null;
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/** @type {number} */
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this.timer = null;
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/** @ts-ignore */
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this.captureStream = this.canvas.captureStream(0);
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this.outputStream = new MediaStream();
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this.outputStream.addTrack(this.captureStream.getTracks()[0]);
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this.input.getTracks().forEach(t => {
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t.onended = e => this.stop();
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if(t.kind != 'video')
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this.outputStream.addTrack(t);
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});
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this.video.srcObject = stream;
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this.video.muted = true;
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this.video.play();
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this.timer = setInterval(() => this.draw(), 1000 / 30);
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}
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Filter.prototype.draw = function() {
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this.canvas.width = this.video.videoWidth;
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this.canvas.height = this.video.videoHeight;
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this.f(this.video, this.canvas);
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/** @ts-ignore */
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this.captureStream.getTracks()[0].requestFrame();
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};
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Filter.prototype.stop = function() {
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if(!this.timer)
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return;
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this.captureStream.getTracks()[0].stop();
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clearTimeout(this.timer);
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this.timer = null;
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};
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let filters = {
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'mirror-h': (video, canvas) => {
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let ctx = canvas.getContext('2d');
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ctx.scale(-1, 1);
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ctx.drawImage(video, -video.videoWidth, 0);
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},
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'mirror-v': (video, canvas) => {
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let ctx = canvas.getContext('2d');
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ctx.scale(1, -1);
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ctx.drawImage(video, 0, -video.videoHeight);
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},
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};
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function isSafari() {
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let ua = navigator.userAgent.toLowerCase();
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return ua.indexOf('safari') >= 0 && ua.indexOf('chrome') < 0;
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@ -791,6 +856,14 @@ async function addLocalMedia(id) {
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let audio = settings.audio ? {deviceId: settings.audio} : false;
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let video = settings.video ? {deviceId: settings.video} : false;
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let filter = null;
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if(settings.filter) {
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filter = filters[settings.filter];
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if(!filter) {
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displayWarning(`Unknown filter ${filter}`);
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}
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}
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if(video) {
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let resolution = settings.resolution;
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if(resolution) {
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@ -830,9 +903,18 @@ async function addLocalMedia(id) {
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let c = newUpStream(id);
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c.kind = 'local';
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c.stream = stream;
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if(filter) {
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let f = new Filter(stream, filter);
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c.stream = f.outputStream;
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c.onclose = function() {
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f.stop();
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}
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} else {
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c.stream = stream;
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}
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let mute = getSettings().localMute;
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stream.getTracks().forEach(t => {
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c.stream.getTracks().forEach(t => {
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c.labels[t.id] = t.kind;
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if(t.kind == 'audio') {
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if(mute)
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@ -972,6 +1054,7 @@ function stopUpMedia(c) {
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try {
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t.stop();
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} catch(e) {
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console.warn(e);
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}
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});
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}
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