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Αυτός ο κώδικας δεν πρέπει να εγκατασταθεί άμεσα. Είναι μια βιβλιοθήκη για άλλους κώδικες που περιλαμβάνεται μέσω της οδηγίας meta // @require https://update.greasyfork.org/scripts/507157/1442600/subtitles-octopus.js
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"use strict"; var SubtitlesOctopus = function (options) { var supportsWebAssembly = false; try { if (typeof WebAssembly === "object" && typeof WebAssembly.instantiate === "function") { const module = new WebAssembly.Module(Uint8Array.of(0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00)); if (module instanceof WebAssembly.Module) supportsWebAssembly = (new WebAssembly.Instance(module) instanceof WebAssembly.Instance); } } catch (e) { } console.log("WebAssembly support detected: " + (supportsWebAssembly ? "yes" : "no")); var self = this; self.canvas = options.canvas; // HTML canvas element (optional if video specified) self.renderMode = options.renderMode || (options.lossyRender ? 'lossy' : 'wasm-blend'); self.libassMemoryLimit = options.libassMemoryLimit || 0; self.libassGlyphLimit = options.libassGlyphLimit || 0; self.targetFps = options.targetFps || 24; self.prescaleFactor = options.prescaleFactor || 1.0; self.prescaleHeightLimit = options.prescaleHeightLimit || 1080; self.maxRenderHeight = options.maxRenderHeight || 0; // 0 - no limit self.dropAllAnimations = options.dropAllAnimations || false; // attempt to remove all animations as a last ditch effort for displaying on weak hardware; may severly mangle subtitles if enabled self.isOurCanvas = false; // (internal) we created canvas and manage it self.video = options.video; // HTML video element (optional if canvas specified) self.canvasParent = null; // (internal) HTML canvas parent element self.fonts = options.fonts || []; // Array with links to fonts used in sub (optional) self.availableFonts = options.availableFonts || []; // Object with all available fonts (optional). Key is font name in lower case, value is link: {"arial": "/font1.ttf"} self.fallbackFont = options.fallbackFont || 'default.woff2'; // URL to override fallback font, for example, with a CJK one. Default fallback font is Liberation Sans (Optional) self.lazyFileLoading = options.lazyFileLoading || false; // Load fonts in a lazy way. Requires Access-Control-Expose-Headers for Accept-Ranges, Content-Length, and Content-Encoding. If Content-Encoding is compressed, file will be fully fetched instead of just a HEAD request. self.onReadyEvent = options.onReady; // Function called when SubtitlesOctopus is ready (optional) if (supportsWebAssembly) { self.workerUrl = options.workerUrl || 'subtitles-octopus-worker.js'; // Link to WebAssembly worker } else { self.workerUrl = options.legacyWorkerUrl || 'subtitles-octopus-worker-legacy.js'; // Link to legacy worker } self.subUrl = options.subUrl; // Link to sub file (optional if subContent specified) self.subContent = options.subContent || null; // Sub content (optional if subUrl specified) self.onErrorEvent = options.onError; // Function called in case of critical error meaning sub wouldn't be shown and you should use alternative method (for instance it occurs if browser doesn't support web workers). self.debug = options.debug || false; // When debug enabled, some performance info printed in console. self.lastRenderTime = 0; // (internal) Last time we got some frame from worker self.pixelRatio = window.devicePixelRatio || 1; // (internal) Device pixel ratio (for high dpi devices) self.timeOffset = options.timeOffset || 0; // Time offset would be applied to currentTime from video (option) self.hasAlphaBug = false; (function() { if (typeof ImageData.prototype.constructor === 'function') { try { // try actually calling ImageData, as on some browsers it's reported // as existing but calling it errors out as "TypeError: Illegal constructor" new window.ImageData(new Uint8ClampedArray([0, 0, 0, 0]), 1, 1); return; } catch (e) { console.log("detected that ImageData is not constructable despite browser saying so"); } } var canvas = document.createElement('canvas'); var ctx = canvas.getContext('2d'); window.ImageData = function () { var i = 0; if (arguments[0] instanceof Uint8ClampedArray) { var data = arguments[i++]; } var width = arguments[i++]; var height = arguments[i]; var imageData = ctx.createImageData(width, height); if (data) imageData.data.set(data); return imageData; } })(); self.workerError = function (error) { console.error('Worker error: ', error); if (self.onErrorEvent) { self.onErrorEvent(error); } if (!self.debug) { self.dispose(); throw new Error('Worker error: ' + error); } }; // Not tested for repeated usage yet self.init = function () { if (!window.Worker) { self.workerError('worker not supported'); return; } // Worker if (!self.worker) { self.worker = new Worker(self.workerUrl); self.worker.addEventListener('message', self.onWorkerMessage); self.worker.addEventListener('error', self.workerError); } self.workerActive = false; self.createCanvas(); self.setVideo(options.video); self.setSubUrl(options.subUrl); self.worker.postMessage({ target: 'worker-init', width: self.canvas.width, height: self.canvas.height, URL: document.URL, currentScript: self.workerUrl, preMain: true, renderMode: self.renderMode, subUrl: self.subUrl, subContent: self.subContent, fonts: self.fonts, availableFonts: self.availableFonts, fallbackFont: self.fallbackFont, lazyFileLoading: self.lazyFileLoading, debug: self.debug, targetFps: self.targetFps, libassMemoryLimit: self.libassMemoryLimit, libassGlyphLimit: self.libassGlyphLimit, dropAllAnimations: self.dropAllAnimations }); }; self.createCanvas = function () { if (!self.canvas) { if (self.video) { self.isOurCanvas = true; self.canvas = document.createElement('canvas'); self.canvas.className = 'libassjs-canvas'; self.canvas.style.display = 'none'; self.canvasParent = document.createElement('div'); self.canvasParent.className = 'libassjs-canvas-parent'; self.canvasParent.appendChild(self.canvas); if (self.video.nextSibling) { self.video.parentNode.insertBefore(self.canvasParent, self.video.nextSibling); } else { self.video.parentNode.appendChild(self.canvasParent); } } else { if (!self.canvas) { self.workerError('Don\'t know where to render: you should give video or canvas in options.'); } } } self.ctx = self.canvas.getContext('2d'); self.bufferCanvas = document.createElement('canvas'); self.bufferCanvasCtx = self.bufferCanvas.getContext('2d'); // test for alpha bug, where e.g. WebKit can render a transparent pixel // (with alpha == 0) as non-black which then leads to visual artifacts self.bufferCanvas.width = 1; self.bufferCanvas.height = 1; var testBuf = new Uint8ClampedArray([0, 255, 0, 0]); var testImage = new ImageData(testBuf, 1, 1); self.bufferCanvasCtx.clearRect(0, 0, 1, 1); self.ctx.clearRect(0, 0, 1, 1); var prePut = self.ctx.getImageData(0, 0, 1, 1).data; self.bufferCanvasCtx.putImageData(testImage, 0, 0); self.ctx.drawImage(self.bufferCanvas, 0, 0); var postPut = self.ctx.getImageData(0, 0, 1, 1).data; self.hasAlphaBug = prePut[1] != postPut[1]; if (self.hasAlphaBug) { console.log("Detected a browser having issue with transparent pixels, applying workaround"); } }; function onTimeUpdate() { self.setCurrentTime(self.video.currentTime + self.timeOffset); }; function onPlaying() { self.setIsPaused(false, self.video.currentTime + self.timeOffset); } function onPause() { self.setIsPaused(true, self.video.currentTime + self.timeOffset); } function onSeeking() { self.video.removeEventListener('timeupdate', onTimeUpdate, false); } function onSeeked() { self.video.addEventListener('timeupdate', onTimeUpdate, false); var currentTime = self.video.currentTime + self.timeOffset; self.setCurrentTime(currentTime); } function onRateChange() { self.setRate(self.video.playbackRate); } function onWaiting() { self.setIsPaused(true, self.video.currentTime + self.timeOffset); } function onLoadedMetadata(e) { e.target.removeEventListener(e.type, onLoadedMetadata, false); self.resize(); } self.setVideo = function (video) { self.video = video; if (self.video) { self.video.addEventListener('timeupdate', onTimeUpdate, false); self.video.addEventListener('playing', onPlaying, false); self.video.addEventListener('pause', onPause, false); self.video.addEventListener('seeking', onSeeking, false); self.video.addEventListener('seeked', onSeeked, false); self.video.addEventListener('ratechange', onRateChange, false); self.video.addEventListener('waiting', onWaiting, false); document.addEventListener("fullscreenchange", self.resizeWithTimeout, false); document.addEventListener("mozfullscreenchange", self.resizeWithTimeout, false); document.addEventListener("webkitfullscreenchange", self.resizeWithTimeout, false); document.addEventListener("msfullscreenchange", self.resizeWithTimeout, false); window.addEventListener("resize", self.resizeWithTimeout, false); // Support Element Resize Observer if (typeof ResizeObserver !== "undefined") { self.ro = new ResizeObserver(self.resizeWithTimeout); self.ro.observe(self.video); } if (self.video.videoWidth > 0) { self.resize(); } else { self.video.addEventListener('loadedmetadata', onLoadedMetadata, false); } } }; self.getVideoPosition = function () { var videoRatio = self.video.videoWidth / self.video.videoHeight; var width = self.video.offsetWidth, height = self.video.offsetHeight; var elementRatio = width / height; var realWidth = width, realHeight = height; if (elementRatio > videoRatio) realWidth = Math.floor(height * videoRatio); else realHeight = Math.floor(width / videoRatio); var x = (width - realWidth) / 2; var y = (height - realHeight) / 2; return { width: realWidth, height: realHeight, x: x, y: y }; }; self.setSubUrl = function (subUrl) { self.subUrl = subUrl; }; self.renderFrameData = null; function renderFrames() { var data = self.renderFramesData; var beforeDrawTime = performance.now(); self.ctx.clearRect(0, 0, self.canvas.width, self.canvas.height); for (var i = 0; i < data.canvases.length; i++) { var image = data.canvases[i]; self.bufferCanvas.width = image.w; self.bufferCanvas.height = image.h; var imageBuffer = new Uint8ClampedArray(image.buffer); if (self.hasAlphaBug) { for (var j = 3; j < imageBuffer.length; j = j + 4) { imageBuffer[j] = (imageBuffer[j] >= 1) ? imageBuffer[j] : 1; } } var imageData = new ImageData(imageBuffer, image.w, image.h); self.bufferCanvasCtx.putImageData(imageData, 0, 0); self.ctx.drawImage(self.bufferCanvas, image.x, image.y); } if (self.debug) { var drawTime = Math.round(performance.now() - beforeDrawTime); var blendTime = data.blendTime; if (typeof blendTime !== 'undefined') { console.log('render: ' + Math.round(data.spentTime - blendTime) + ' ms, blend: ' + Math.round(blendTime) + ' ms, draw: ' + drawTime + ' ms; TOTAL=' + Math.round(data.spentTime + drawTime) + ' ms'); } else { console.log(Math.round(data.spentTime) + ' ms (+ ' + drawTime + ' ms draw)'); } self.renderStart = performance.now(); } } /** * Lossy Render Mode * */ function renderFastFrames() { var data = self.renderFramesData; var beforeDrawTime = performance.now(); self.ctx.clearRect(0, 0, self.canvas.width, self.canvas.height); for (var i = 0; i < data.bitmaps.length; i++) { var image = data.bitmaps[i]; self.ctx.drawImage(image.bitmap, image.x, image.y); } if (self.debug) { var drawTime = Math.round(performance.now() - beforeDrawTime); console.log(data.bitmaps.length + ' bitmaps, libass: ' + Math.round(data.libassTime) + 'ms, decode: ' + Math.round(data.decodeTime) + 'ms, draw: ' + drawTime + 'ms'); self.renderStart = performance.now(); } } self.workerActive = false; self.frameId = 0; self.onWorkerMessage = function (event) { //dump('\nclient got ' + JSON.stringify(event.data).substr(0, 150) + '\n'); if (!self.workerActive) { self.workerActive = true; if (self.onReadyEvent) { self.onReadyEvent(); } } var data = event.data; switch (data.target) { case 'stdout': { console.log(data.content); break; } case 'console-log': { console.log.apply(console, JSON.parse(data.content)); break; } case 'console-debug': { console.debug.apply(console, JSON.parse(data.content)); break; } case 'console-info': { console.info.apply(console, JSON.parse(data.content)); break; } case 'console-warn': { console.warn.apply(console, JSON.parse(data.content)); break; } case 'console-error': { console.error.apply(console, JSON.parse(data.content)); break; } case 'stderr': { console.error(data.content); break; } case 'window': { window[data.method](); break; } case 'canvas': { switch (data.op) { case 'getContext': { self.ctx = self.canvas.getContext(data.type, data.attributes); break; } case 'resize': { self.resize(data.width, data.height); break; } case 'renderCanvas': { if (self.lastRenderTime < data.time) { self.lastRenderTime = data.time; self.renderFramesData = data; window.requestAnimationFrame(renderFrames); } break; } case 'renderFastCanvas': { if (self.lastRenderTime < data.time) { self.lastRenderTime = data.time; self.renderFramesData = data; window.requestAnimationFrame(renderFastFrames); } break; } case 'setObjectProperty': { self.canvas[data.object][data.property] = data.value; break; } default: throw 'eh?'; } break; } case 'tick': { self.frameId = data.id; self.worker.postMessage({ target: 'tock', id: self.frameId }); break; } case 'custom': { if (self['onCustomMessage']) { self['onCustomMessage'](event); } else { throw 'Custom message received but client onCustomMessage not implemented.'; } break; } case 'setimmediate': { self.worker.postMessage({ target: 'setimmediate' }); break; } case 'get-events': { break; } case 'get-styles': { break; } case 'ready': { break; } default: throw 'what? ' + data.target; } }; function _computeCanvasSize(width, height) { var scalefactor = self.prescaleFactor <= 0 ? 1.0 : self.prescaleFactor; if (height <= 0 || width <= 0) { width = 0; height = 0; } else { var sgn = scalefactor < 1 ? -1 : 1; var newH = height; if (sgn * newH * scalefactor <= sgn * self.prescaleHeightLimit) newH *= scalefactor; else if (sgn * newH < sgn * self.prescaleHeightLimit) newH = self.prescaleHeightLimit; if (self.maxRenderHeight > 0 && newH > self.maxRenderHeight) newH = self.maxRenderHeight; width *= newH / height; height = newH; } return {'width': width, 'height': height}; } self.resize = function (width, height, top, left) { var videoSize = null; top = top || 0; left = left || 0; if ((!width || !height) && self.video) { videoSize = self.getVideoPosition(); var newSize = _computeCanvasSize(videoSize.width * self.pixelRatio, videoSize.height * self.pixelRatio); width = newSize.width; height = newSize.height; var offset = self.canvasParent.getBoundingClientRect().top - self.video.getBoundingClientRect().top; top = videoSize.y - offset; left = videoSize.x; } if (!width || !height) { if (!self.video) { console.error('width or height is 0. You should specify width & height for resize.'); } return; } if ( self.canvas.width != width || self.canvas.height != height || self.canvas.style.top != top || self.canvas.style.left != left ) { self.canvas.width = width; self.canvas.height = height; if (videoSize != null) { self.canvasParent.style.position = 'relative'; self.canvas.style.display = 'block'; self.canvas.style.position = 'absolute'; self.canvas.style.width = videoSize.width + 'px'; self.canvas.style.height = videoSize.height + 'px'; self.canvas.style.top = top + 'px'; self.canvas.style.left = left + 'px'; self.canvas.style.pointerEvents = 'none'; } self.worker.postMessage({ target: 'canvas', width: self.canvas.width, height: self.canvas.height }); } }; self.resizeWithTimeout = function () { self.resize(); setTimeout(self.resize, 100); }; self.runBenchmark = function () { self.worker.postMessage({ target: 'runBenchmark' }); }; self.customMessage = function (data, options) { options = options || {}; self.worker.postMessage({ target: 'custom', userData: data, preMain: options.preMain }); }; self.setCurrentTime = function (currentTime) { self.worker.postMessage({ target: 'video', currentTime: currentTime }); }; self.setTrackByUrl = function (url) { self.worker.postMessage({ target: 'set-track-by-url', url: url }); }; self.setTrack = function (content) { self.worker.postMessage({ target: 'set-track', content: content }); }; self.freeTrack = function (content) { self.worker.postMessage({ target: 'free-track' }); }; self.render = self.setCurrentTime; self.setIsPaused = function (isPaused, currentTime) { self.worker.postMessage({ target: 'video', isPaused: isPaused, currentTime: currentTime }); }; self.setRate = function (rate) { self.worker.postMessage({ target: 'video', rate: rate }); }; self.dispose = function () { self.worker.postMessage({ target: 'destroy' }); self.worker.terminate(); self.worker.removeEventListener('message', self.onWorkerMessage); self.worker.removeEventListener('error', self.workerError); self.workerActive = false; self.worker = null; // Remove the canvas element to remove residual subtitles rendered on player if (self.video) { self.video.removeEventListener('timeupdate', onTimeUpdate, false); self.video.removeEventListener('playing', onPlaying, false); self.video.removeEventListener('pause', onPause, false); self.video.removeEventListener('seeking', onSeeking, false); self.video.removeEventListener('seeked', onSeeked, false); self.video.removeEventListener('ratechange', onRateChange, false); self.video.removeEventListener('waiting', onWaiting, false); self.video.removeEventListener('loadedmetadata', onLoadedMetadata, false); document.removeEventListener('fullscreenchange', self.resizeWithTimeout, false); document.removeEventListener('mozfullscreenchange', self.resizeWithTimeout, false); document.removeEventListener('webkitfullscreenchange', self.resizeWithTimeout, false); document.removeEventListener('msfullscreenchange', self.resizeWithTimeout, false); window.removeEventListener('resize', self.resizeWithTimeout, false); self.video.parentNode.removeChild(self.canvasParent); self.video = null; } if (self.ro) { self.ro.disconnect(); self.ro = null; } self.onCustomMessage = null; self.onErrorEvent = null; self.onReadyEvent = null; }; self.fetchFromWorker = function (workerOptions, onSuccess, onError) { try { var target = workerOptions['target'] var timeout = setTimeout(function() { reject(Error('Error: Timeout while try to fetch ' + target)) }, 5000) var resolve = function (event) { if (event.data.target == target) { onSuccess(event.data) self.worker.removeEventListener('message', resolve) self.worker.removeEventListener('error', reject) clearTimeout(timeout) } } var reject = function (event) { onError(event) self.worker.removeEventListener('message', resolve) self.worker.removeEventListener('error', reject) clearTimeout(timeout) } self.worker.addEventListener('message', resolve) self.worker.addEventListener('error', reject) self.worker.postMessage(workerOptions) } catch (error) { onError(error) } } self.createEvent = function (event) { self.worker.postMessage({ target: 'create-event', event: event }); }; self.getEvents = function (onSuccess, onError) { self.fetchFromWorker({ target: 'get-events' }, function(data) { onSuccess(data.events) }, onError); }; self.setEvent = function (event, index) { self.worker.postMessage({ target: 'set-event', event: event, index: index }); }; self.removeEvent = function (index) { self.worker.postMessage({ target: 'remove-event', index: index }); }; self.createStyle = function (style) { self.worker.postMessage({ target: 'create-style', style: style }); }; self.getStyles = function (onSuccess, onError) { self.fetchFromWorker({ target: 'get-styles' }, function(data) { onSuccess(data.styles) }, onError); }; self.setStyle = function (style, index) { self.worker.postMessage({ target: 'set-style', style: style, index: index }); }; self.removeStyle = function (index) { self.worker.postMessage({ target: 'remove-style', index: index }); }; self.init(); }; if (typeof SubtitlesOctopusOnLoad == 'function') { SubtitlesOctopusOnLoad(); } if (typeof exports !== 'undefined') { if (typeof module !== 'undefined' && module.exports) { exports = module.exports = SubtitlesOctopus } }
