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Allow filters to maintain state.
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1 changed files with 8 additions and 0 deletions
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@ -800,6 +800,8 @@ async function setMaxVideoThroughput(c, bps) {
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* @property {string} [description]
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* @property {string} [contextType]
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* @property {Object} [contextAttributes]
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* @property {(this: Filter, ctx: RenderingContext) => void} [init]
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* @property {(this: Filter) => void} [cleanup]
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* @property {(this: Filter, src: CanvasImageSource, width: number, height: number, ctx: RenderingContext) => boolean} f
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*/
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@ -838,6 +840,8 @@ function Filter(stream, definition) {
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this.count = 0;
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/** @type {boolean} */
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this.fixedFramerate = false;
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/** @type {Object} */
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this.userdata = {}
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/** @ts-ignore */
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this.captureStream = this.canvas.captureStream(0);
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@ -859,6 +863,8 @@ function Filter(stream, definition) {
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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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if(this.definition.init)
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this.definition.init.call(this, this.context);
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this.timer = setInterval(() => this.draw(), 1000 / this.frameRate);
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}
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@ -902,6 +908,8 @@ Filter.prototype.stop = function() {
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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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if(this.definition.cleanup)
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this.definition.cleanup.call(this);
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};
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/**
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