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Rework filters.
Make it possible to attach filters dynamically. Work around bugs in Firefox.
This commit is contained in:
Juliusz Chroboczek
parent
49bcc342ed
commit
b24bd5c0ed
1 changed files with 95 additions and 25 deletions
120
static/galene.js
120
static/galene.js
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@ -778,22 +778,36 @@ async function setMaxVideoThroughput(c, bps) {
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}
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}
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/**
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* @typedef {Object} filterDefinition
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* @property {string} [description]
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* @property {string} [contextType]
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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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/**
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* @param {MediaStream} stream
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* @param {(this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean} f
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* @param {filterDefinition} definition
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* @constructor
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*/
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function Filter(stream, f) {
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function Filter(stream, definition) {
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/** @ts-ignore */
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if(!HTMLCanvasElement.prototype.captureStream) {
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throw new Error('Filters are not supported on this platform');
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}
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/** @type {MediaStream} */
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this.inputStream = stream;
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/** @type {(this: Filter, src: CanvasImageSource, dest: HTMLCanvasElement) => boolean} */
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this.f = f;
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/** @type {filterDefinition} */
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this.definition = definition;
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/** @type {number} */
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this.frameRate = 30;
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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 {any} */
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this.context = this.canvas.getContext(definition.contextType || '2d');
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/** @type {MediaStream} */
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this.captureStream = null;
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/** @type {MediaStream} */
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@ -802,9 +816,18 @@ function Filter(stream, f) {
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this.timer = null;
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/** @type {number} */
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this.count = 0;
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/** @type {boolean} */
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this.fixedFramerate = false;
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/** @ts-ignore */
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this.captureStream = this.canvas.captureStream(0);
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/** @ts-ignore */
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if(!this.captureStream.getTracks()[0].requestFrame) {
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console.warn('captureFrame not supported, using fixed framerate');
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/** @ts-ignore */
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this.captureStream = this.canvas.captureStream(this.frameRate);
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this.fixedFramerate = true;
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}
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this.outputStream = new MediaStream();
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this.outputStream.addTrack(this.captureStream.getTracks()[0]);
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@ -837,10 +860,11 @@ Filter.prototype.draw = function() {
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}
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this.count++;
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this.canvas.width = this.video.videoWidth;
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this.canvas.height = this.video.videoHeight;
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let ok = this.f.call(this, this.video, this.canvas);
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if(ok) {
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let ok = this.definition.f.call(this, this.video,
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this.video.videoWidth,
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this.video.videoHeight,
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this.context);
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if(ok && !this.fixedFramerate) {
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/** @ts-ignore */
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this.captureStream.getTracks()[0].requestFrame();
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}
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@ -855,20 +879,65 @@ Filter.prototype.stop = function() {
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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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* @param {Stream} c
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* @param {Filter} f
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*/
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function setFilter(c, f) {
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if(!f) {
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let filter = c.userdata.filter;
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if(!(filter instanceof Filter))
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throw new Error('userdata.filter is not a filter');
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if(c.userdata.filter) {
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c.stream = c.userdata.filter.inputStream;
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c.userdata.filter.stop();
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c.userdata.filter = null;
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}
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if(!c.onclose) {
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console.warn("onclose not set, this shouldn't happen");
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c.onclose = null;
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}
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return
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}
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if(c.userdata.filter)
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setFilter(c, null);
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if(c.onclose)
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throw new Error('onclose already taken');
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if(f.inputStream != c.stream)
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throw new Error('Setting filter for wrong stream');
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c.stream = f.outputStream;
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c.userdata.filter = f;
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c.onclose = () => setFilter(c, null);
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}
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/**
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* @type {Object.<string,filterDefinition>}
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*/
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let filters = {
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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, -canvas.width, 0);
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return true;
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'mirror-h': {
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description: "Horizontal mirror",
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f: function(src, width, height, ctx) {
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if(!(ctx instanceof CanvasRenderingContext2D))
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throw new Error('bad context type');
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ctx.canvas.width = width;
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ctx.canvas.height = height;
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ctx.scale(-1, 1);
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ctx.drawImage(src, -width, 0);
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return true;
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},
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},
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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, -canvas.height);
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return true;
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'mirror-v': {
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description: "Vertical mirror",
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f: function(src, width, height, ctx) {
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if(!(ctx instanceof CanvasRenderingContext2D))
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throw new Error('bad context type');
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ctx.canvas.width = width;
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ctx.canvas.height = height;
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ctx.scale(1, -1);
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ctx.drawImage(src, 0, -height);
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return true;
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},
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},
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};
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@ -933,14 +1002,15 @@ 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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try {
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let f = new Filter(stream, filter);
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setFilter(c, f);
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} catch(e) {
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displayWarning(e);
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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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