browser-id3-writer.4.0.0.js

!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.ID3Writer=t()}(this,function(){"use strict";function e(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function t(e){return String(e).split("").map(function(e){return e.charCodeAt(0)})}function r(e){return new Uint8Array(t(e))}function n(e){var r=new Uint8Array(2*e.length);return new Uint16Array(r.buffer).set(t(e)),r}function a(e){return 73===e[0]&&68===e[1]&&51===e[2]}function i(e){if(!e||!e.length)return null;if(255===e[0]&&216===e[1]&&255===e[2])return"image/jpeg";if(137===e[0]&&80===e[1]&&78===e[2]&&71===e[3])return"image/png";if(71===e[0]&&73===e[1]&&70===e[2])return"image/gif";if(87===e[8]&&69===e[9]&&66===e[10]&&80===e[11])return"image/webp";var t=73===e[0]&&73===e[1]&&42===e[2]&&0===e[3],r=77===e[0]&&77===e[1]&&0===e[2]&&42===e[3];return t||r?"image/tiff":66===e[0]&&77===e[1]?"image/bmp":0===e[0]&&0===e[1]&&1===e[2]&&0===e[3]?"image/x-icon":null}function s(e){return[e>>>24&255,e>>>16&255,e>>>8&255,255&e]}function o(e){return[e>>>21&127,e>>>14&127,e>>>7&127,127&e]}function c(e){return(e[0]<<21)+(e[1]<<14)+(e[2]<<7)+e[3]}function u(e){return 11+e}function f(e){return 13+2*e}function h(e,t){return 16+2*e+2+2+2*t}function p(e,t,r,n){return 11+t+1+1+(n?2+2*(r+1):r+1)+e}function l(e,t){return 16+2*e+2+2+2*t}function g(e,t){return 13+2*e+2+2+2*t}function m(e){return 10+e}return function(){function t(r){if(e(this,t),!(r&&"object"==typeof r&&"byteLength"in r))throw new Error("First argument should be an instance of ArrayBuffer or Buffer");this.arrayBuffer=r,this.padding=4096,this.frames=[],this.url=""}return t.prototype._setIntegerFrame=function(e,t){var r=parseInt(t,10);this.frames.push({name:e,value:r,size:u(r.toString().length)})},t.prototype._setStringFrame=function(e,t){var r=t.toString();this.frames.push({name:e,value:r,size:f(r.length)})},t.prototype._setPictureFrame=function(e,t,r,n){var a=i(new Uint8Array(t)),s=r.toString();if(!a)throw new Error("Unknown picture MIME type");r||(n=!1),this.frames.push({name:"APIC",value:t,pictureType:e,mimeType:a,useUnicodeEncoding:n,description:s,size:p(t.byteLength,a.length,s.length,n)})},t.prototype._setLyricsFrame=function(e,t){var r=e.toString(),n=t.toString();this.frames.push({name:"USLT",value:n,description:r,size:h(r.length,n.length)})},t.prototype._setCommentFrame=function(e,t){var r=e.toString(),n=t.toString();this.frames.push({name:"COMM",value:n,description:r,size:l(r.length,n.length)})},t.prototype._setUserStringFrame=function(e,t){var r=e.toString(),n=t.toString();this.frames.push({name:"TXXX",description:r,value:n,size:g(r.length,n.length)})},t.prototype._setUrlLinkFrame=function(e,t){var r=t.toString();this.frames.push({name:e,value:r,size:m(r.length)})},t.prototype.setFrame=function(e,t){switch(e){case"TPE1":case"TCOM":case"TCON":if(!Array.isArray(t))throw new Error(e+" frame value should be an array of strings");var r="TCON"===e?";":"/",n=t.join(r);this._setStringFrame(e,n);break;case"TIT2":case"TALB":case"TPE2":case"TPE3":case"TPE4":case"TRCK":case"TPOS":case"TMED":case"TPUB":this._setStringFrame(e,t);break;case"TBPM":case"TLEN":case"TYER":this._setIntegerFrame(e,t);break;case"USLT":if(!("object"==typeof t&&"description"in t&&"lyrics"in t))throw new Error("USLT frame value should be an object with keys description and lyrics");this._setLyricsFrame(t.description,t.lyrics);break;case"APIC":if(!("object"==typeof t&&"type"in t&&"data"in t&&"description"in t))throw new Error("APIC frame value should be an object with keys type, data and description");if(t.type<0||t.type>20)throw new Error("Incorrect APIC frame picture type");this._setPictureFrame(t.type,t.data,t.description,!!t.useUnicodeEncoding);break;case"TXXX":if(!("object"==typeof t&&"description"in t&&"value"in t))throw new Error("TXXX frame value should be an object with keys description and value");this._setUserStringFrame(t.description,t.value);break;case"TKEY":if(!/^([A-G][#b]?m?|o)$/.test(t))throw new Error(e+" frame value should be like Dbm, C#, B or o");this._setStringFrame(e,t);break;case"WCOM":case"WCOP":case"WOAF":case"WOAR":case"WOAS":case"WORS":case"WPAY":case"WPUB":this._setUrlLinkFrame(e,t);break;case"COMM":if(!("object"==typeof t&&"description"in t&&"text"in t))throw new Error("COMM frame value should be an object with keys description and text");this._setCommentFrame(t.description,t.text);break;default:throw new Error("Unsupported frame "+e)}return this},t.prototype.removeTag=function(){if(!(this.arrayBuffer.byteLength<10)){var e=new Uint8Array(this.arrayBuffer),t=e[3],r=c([e[6],e[7],e[8],e[9]])+10;!a(e)||t<2||t>4||(this.arrayBuffer=new Uint8Array(e.subarray(r)).buffer)}},t.prototype.addTag=function(){this.removeTag();var e=[255,254],t=[101,110,103],a=10+this.frames.reduce(function(e,t){return e+t.size},0)+this.padding,i=new ArrayBuffer(this.arrayBuffer.byteLength+a),c=new Uint8Array(i),u=0,f=[];return f=[73,68,51,3],c.set(f,u),u+=f.length,u++,u++,f=o(a-10),c.set(f,u),u+=f.length,this.frames.forEach(function(a){switch(f=r(a.name),c.set(f,u),u+=f.length,f=s(a.size-10),c.set(f,u),u+=f.length,u+=2,a.name){case"WCOM":case"WCOP":case"WOAF":case"WOAR":case"WOAS":case"WORS":case"WPAY":case"WPUB":f=r(a.value),c.set(f,u),u+=f.length;break;case"TPE1":case"TCOM":case"TCON":case"TIT2":case"TALB":case"TPE2":case"TPE3":case"TPE4":case"TRCK":case"TPOS":case"TKEY":case"TMED":case"TPUB":f=[1].concat(e),c.set(f,u),u+=f.length,f=n(a.value),c.set(f,u),u+=f.length;break;case"TXXX":case"USLT":case"COMM":f=[1],"USLT"!==a.name&&"COMM"!==a.name||(f=f.concat(t)),f=f.concat(e),c.set(f,u),u+=f.length,f=n(a.description),c.set(f,u),u+=f.length,f=[0,0].concat(e),c.set(f,u),u+=f.length,f=n(a.value),c.set(f,u),u+=f.length;break;case"TBPM":case"TLEN":case"TYER":u++,f=r(a.value),c.set(f,u),u+=f.length;break;case"APIC":f=[a.useUnicodeEncoding?1:0],c.set(f,u),u+=f.length,f=r(a.mimeType),c.set(f,u),u+=f.length,f=[0,a.pictureType],c.set(f,u),u+=f.length,a.useUnicodeEncoding?(f=[].concat(e),c.set(f,u),u+=f.length,f=n(a.description),c.set(f,u),u+=f.length,u+=2):(f=r(a.description),c.set(f,u),u+=f.length,u++),c.set(new Uint8Array(a.value),u),u+=a.value.byteLength}}),u+=this.padding,c.set(new Uint8Array(this.arrayBuffer),u),this.arrayBuffer=i,i},t.prototype.getBlob=function(){return new Blob([this.arrayBuffer],{type:"audio/mpeg"})},t.prototype.getURL=function(){return this.url||(this.url=URL.createObjectURL(this.getBlob())),this.url},t.prototype.revokeURL=function(){URL.revokeObjectURL(this.url)},t}()});