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Better typing for filters, allow filters to skip frames.

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This commit is contained in:
Juliusz Chroboczek 2021-01-12 03:47:25 +01:00
parent a5b57976d2
commit cf6c1203c8
1 changed files with 17 additions and 9 deletions
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26
static/galene.js
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@ -779,12 +779,14 @@ async function setMaxVideoThroughput(c, bps) {
}
/**
* @param {MediaStream} stream
* @param {(this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean} f
* @constructor
*/
function Filter(stream, f) {
/** @type {MediaStream} */
this.inputStream = stream;
/** @type {(this: Filter, src: HTMLElement, dest: HTMLCanvasElement) => void} */
/** @type {(this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean} */
this.f = f;
/** @type {number} */
this.frameRate = 30;
@ -801,7 +803,6 @@ function Filter(stream, f) {
/** @type {number} */
this.count = 0;
//this.input.getTracks().forEach(t => console.log(t.getSettings()));
/** @ts-ignore */
this.captureStream = this.canvas.captureStream(0);
@ -838,9 +839,11 @@ Filter.prototype.draw = function() {
this.canvas.width = this.video.videoWidth;
this.canvas.height = this.video.videoHeight;
this.f(this.video, this.canvas);
/** @ts-ignore */
this.captureStream.getTracks()[0].requestFrame();
let ok = this.f.call(this, this.video, this.canvas);
if(ok) {
/** @ts-ignore */
this.captureStream.getTracks()[0].requestFrame();
}
};
Filter.prototype.stop = function() {
@ -851,16 +854,21 @@ Filter.prototype.stop = function() {
this.timer = null;
};
/**
* @type {Object.<string, ((this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean)>}
*/
let filters = {
'mirror-h': (video, canvas) => {
'mirror-h': function(video, canvas) {
let ctx = canvas.getContext('2d');
ctx.scale(-1, 1);
ctx.drawImage(video, -video.videoWidth, 0);
ctx.drawImage(video, -canvas.width, 0);
return true;
},
'mirror-v': (video, canvas) => {
'mirror-v': function(video, canvas) {
let ctx = canvas.getContext('2d');
ctx.scale(1, -1);
ctx.drawImage(video, 0, -video.videoHeight);
ctx.drawImage(video, 0, -canvas.height);
return true;
},
};