From bd0248dc1950ff7bed741654d08d1595c029e62e Mon Sep 17 00:00:00 2001 From: = <=> Date: Sun, 26 Apr 2015 16:45:44 +0530 Subject: [PATCH] whammy.js can encode webp image array to webm even in the browsers which does not support webp, but atob function which uses inside webp is not cross browser compatible so whammy.js break in safari, this fix added --- whammy.js | 176 +++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 174 insertions(+), 2 deletions(-) diff --git a/whammy.js b/whammy.js index bfac931..358479f 100644 --- a/whammy.js +++ b/whammy.js @@ -1,3 +1,175 @@ +/* +base64.js support added.. + +;(function(root) { + + // Detect free variables `exports`. + var freeExports = typeof exports == 'object' && exports; + + // Detect free variable `module`. + var freeModule = typeof module == 'object' && module && + module.exports == freeExports && module; + + // Detect free variable `global`, from Node.js or Browserified code, and use + // it as `root`. + var freeGlobal = typeof global == 'object' && global; + if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) { + root = freeGlobal; + } + + /*--------------------------------------------------------------------------*/ + + var InvalidCharacterError = function(message) { + this.message = message; + }; + InvalidCharacterError.prototype = new Error; + InvalidCharacterError.prototype.name = 'InvalidCharacterError'; + + var error = function(message) { + // Note: the error messages used throughout this file match those used by + // the native `atob`/`btoa` implementation in Chromium. + throw new InvalidCharacterError(message); + }; + + var TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; + // http://whatwg.org/html/common-microsyntaxes.html#space-character + var REGEX_SPACE_CHARACTERS = /[\t\n\f\r ]/g; + + // `decode` is designed to be fully compatible with `atob` as described in the + // HTML Standard. http://whatwg.org/html/webappapis.html#dom-windowbase64-atob + // The optimized base64-decoding algorithm used is based on @atk’s excellent + // implementation. https://gist.github.com/atk/1020396 + var decode = function(input) { + input = String(input) + .replace(REGEX_SPACE_CHARACTERS, ''); + var length = input.length; + if (length % 4 == 0) { + input = input.replace(/==?$/, ''); + length = input.length; + } + if ( + length % 4 == 1 || + // http://whatwg.org/C#alphanumeric-ascii-characters + /[^+a-zA-Z0-9/]/.test(input) + ) { + error( + 'Invalid character: the string to be decoded is not correctly encoded.' + ); + } + var bitCounter = 0; + var bitStorage; + var buffer; + var output = ''; + var position = -1; + while (++position < length) { + buffer = TABLE.indexOf(input.charAt(position)); + bitStorage = bitCounter % 4 ? bitStorage * 64 + buffer : buffer; + // Unless this is the first of a group of 4 characters… + if (bitCounter++ % 4) { + // …convert the first 8 bits to a single ASCII character. + output += String.fromCharCode( + 0xFF & bitStorage >> (-2 * bitCounter & 6) + ); + } + } + return output; + }; + + // `encode` is designed to be fully compatible with `btoa` as described in the + // HTML Standard: http://whatwg.org/html/webappapis.html#dom-windowbase64-btoa + var encode = function(input) { + input = String(input); + if (/[^\0-\xFF]/.test(input)) { + // Note: no need to special-case astral symbols here, as surrogates are + // matched, and the input is supposed to only contain ASCII anyway. + error( + 'The string to be encoded contains characters outside of the ' + + 'Latin1 range.' + ); + } + var padding = input.length % 3; + var output = ''; + var position = -1; + var a; + var b; + var c; + var d; + var buffer; + // Make sure any padding is handled outside of the loop. + var length = input.length - padding; + + while (++position < length) { + // Read three bytes, i.e. 24 bits. + a = input.charCodeAt(position) << 16; + b = input.charCodeAt(++position) << 8; + c = input.charCodeAt(++position); + buffer = a + b + c; + // Turn the 24 bits into four chunks of 6 bits each, and append the + // matching character for each of them to the output. + output += ( + TABLE.charAt(buffer >> 18 & 0x3F) + + TABLE.charAt(buffer >> 12 & 0x3F) + + TABLE.charAt(buffer >> 6 & 0x3F) + + TABLE.charAt(buffer & 0x3F) + ); + } + + if (padding == 2) { + a = input.charCodeAt(position) << 8; + b = input.charCodeAt(++position); + buffer = a + b; + output += ( + TABLE.charAt(buffer >> 10) + + TABLE.charAt((buffer >> 4) & 0x3F) + + TABLE.charAt((buffer << 2) & 0x3F) + + '=' + ); + } else if (padding == 1) { + buffer = input.charCodeAt(position); + output += ( + TABLE.charAt(buffer >> 2) + + TABLE.charAt((buffer << 4) & 0x3F) + + '==' + ); + } + + return output; + }; + + var base64 = { + 'encode': encode, + 'decode': decode, + 'version': '0.1.0' + }; + + // Some AMD build optimizers, like r.js, check for specific condition patterns + // like the following: + if ( + typeof define == 'function' && + typeof define.amd == 'object' && + define.amd + ) { + define(function() { + return base64; + }); + } else if (freeExports && !freeExports.nodeType) { + if (freeModule) { // in Node.js or RingoJS v0.8.0+ + freeModule.exports = base64; + } else { // in Narwhal or RingoJS v0.7.0- + for (var key in base64) { + base64.hasOwnProperty(key) && (freeExports[key] = base64[key]); + } + } + } else { // in Rhino or a web browser + root.base64 = base64; + } + +}(this)); + +*/ + + + /* var vid = new Whammy.Video(); vid.add(canvas or data url) @@ -513,7 +685,7 @@ window.Whammy = (function(){ WhammyVideo.prototype.compile = function(outputAsArray){ return new toWebM(this.frames.map(function(frame){ - var webp = parseWebP(parseRIFF(atob(frame.image.slice(23)))); + var webp = parseWebP(parseRIFF(base64.decode(frame.image.slice(23)))); webp.duration = frame.duration; return webp; }), outputAsArray) @@ -523,7 +695,7 @@ window.Whammy = (function(){ Video: WhammyVideo, fromImageArray: function(images, fps, outputAsArray){ return toWebM(images.map(function(image){ - var webp = parseWebP(parseRIFF(atob(image.slice(23)))) + var webp = parseWebP(parseRIFF(base64.decode(image.slice(23)))) webp.duration = 1000 / fps; return webp; }), outputAsArray)