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Better typing for filters, allow filters to skip frames.
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parent
a5b57976d2
commit
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1 changed files with 17 additions and 9 deletions
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@ -779,12 +779,14 @@ async function setMaxVideoThroughput(c, bps) {
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}
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/**
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* @param {MediaStream} stream
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* @param {(this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean} f
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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.inputStream = stream;
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/** @type {(this: Filter, src: HTMLElement, dest: HTMLCanvasElement) => void} */
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/** @type {(this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean} */
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this.f = f;
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/** @type {number} */
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this.frameRate = 30;
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@ -801,7 +803,6 @@ function Filter(stream, f) {
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/** @type {number} */
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this.count = 0;
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//this.input.getTracks().forEach(t => console.log(t.getSettings()));
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/** @ts-ignore */
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this.captureStream = this.canvas.captureStream(0);
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@ -838,9 +839,11 @@ 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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let ok = this.f.call(this, this.video, this.canvas);
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if(ok) {
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/** @ts-ignore */
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this.captureStream.getTracks()[0].requestFrame();
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}
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};
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Filter.prototype.stop = function() {
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@ -851,16 +854,21 @@ Filter.prototype.stop = function() {
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this.timer = null;
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};
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/**
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* @type {Object.<string, ((this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean)>}
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*/
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let filters = {
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'mirror-h': (video, canvas) => {
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'mirror-h': function(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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ctx.drawImage(video, -canvas.width, 0);
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return true;
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},
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'mirror-v': (video, canvas) => {
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'mirror-v': function(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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ctx.drawImage(video, 0, -canvas.height);
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return true;
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},
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};
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