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null;if(255===t[0]&&216===t[1]&&255===t[2])return"image/jpeg";if(137===t[0]&&80===t[1]&&78===t[2]&&71===t[3])return"image/png";if(71===t[0]&&73===t[1]&&70===t[2])return"image/gif";if(87===t[8]&&69===t[9]&&66===t[10]&&80===t[11])return"image/webp";var e=73===t[0]&&73===t[1]&&42===t[2]&&0===t[3],r=77===t[0]&&77===t[1]&&0===t[2]&&42===t[3];return e||r?"image/tiff":66===t[0]&&77===t[1]?"image/bmp":0===t[0]&&0===t[1]&&1===t[2]&&0===t[3]?"image/x-icon":null}(new Uint8Array(e)),u=r.toString();if(!s)throw new Error("Unknown picture MIME type");r||(n=!1),this.frames.push({name:"APIC",value:e,pictureType:t,mimeType:s,useUnicodeEncoding:n,description:u,size:(i=e.byteLength,o=s.length,a=u.length,11+o+1+1+(n?2+2*(a+1):a+1)+i)})},t._setLyricsFrame=function(t,e,r){var n,i,o=t.split("").map((function(t){return t.charCodeAt(0)})),a=e.toString(),s=r.toString();this.frames.push({name:"USLT",value:s,language:o,description:a,size:(n=a.length,i=s.length,16+2*n+2+2+2*i)})},t._setCommentFrame=function(t,e,r){var n,i,o=t.split("").map((function(t){return t.charCodeAt(0)})),a=e.toString(),s=r.toString();this.frames.push({name:"COMM",value:s,language:o,description:a,size:(n=a.length,i=s.length,16+2*n+2+2+2*i)})},t._setPrivateFrame=function(t,e){var r,n,i=t.toString();this.frames.push({name:"PRIV",value:e,id:i,size:(r=i.length,n=e.byteLength,10+r+1+n)})},t._setUserStringFrame=function(t,e){var r,n,i=t.toString(),o=e.toString();this.frames.push({name:"TXXX",description:i,value:o,size:(r=i.length,n=o.length,13+2*r+2+2+2*n)})},t._setUrlLinkFrame=function(t,e){var r=e.toString();this.frames.push({name:t,value:r,size:10+r.length})},t.setFrame=function(t,e){switch(t){case"TPE1":case"TCOM":case"TCON":if(!Array.isArray(e))throw new Error(t+" frame value should be an array of strings");var r="TCON"===t?";":"/",n=e.join(r);this._setStringFrame(t,n);break;case"TLAN":case"TIT1":case"TIT2":case"TIT3":case"TALB":case"TPE2":case"TPE3":case"TPE4":case"TRCK":case"TPOS":case"TMED":case"TPUB":case"TCOP":case"TKEY":case"TEXT":case"TSRC":this._setStringFrame(t,e);break;case"TBPM":case"TLEN":case"TDAT":case"TYER":this._setIntegerFrame(t,e);break;case"USLT":if(e.language=e.language||"eng","object"!=typeof e||!("description"in e)||!("lyrics"in e))throw new Error("USLT frame value should be an object with keys description and lyrics");if(e.language&&!e.language.match(/[a-z]{3}/i))throw new Error("Language must be coded following the ISO 639-2 standards");this._setLyricsFrame(e.language,e.description,e.lyrics);break;case"APIC":if(!("object"==typeof e&&"type"in e&&"data"in e&&"description"in e))throw new Error("APIC frame value should be an object with keys type, data and description");if(e.type<0||20<e.type)throw new Error("Incorrect APIC frame picture type");this._setPictureFrame(e.type,e.data,e.description,!!e.useUnicodeEncoding);break;case"TXXX":if("object"!=typeof e||!("description"in e)||!("value"in e))throw new Error("TXXX frame value should be an object with keys description and value");this._setUserStringFrame(e.description,e.value);break;case"WCOM":case"WCOP":case"WOAF":case"WOAR":case"WOAS":case"WORS":case"WPAY":case"WPUB":this._setUrlLinkFrame(t,e);break;case"COMM":if(e.language=e.language||"eng","object"!=typeof e||!("description"in e)||!("text"in e))throw new Error("COMM frame value should be an object with keys description and text");if(e.language&&!e.language.match(/[a-z]{3}/i))throw new Error("Language must be coded following the ISO 639-2 standards");this._setCommentFrame(e.language,e.description,e.text);break;case"PRIV":if("object"!=typeof e||!("id"in e)||!("data"in e))throw new Error("PRIV frame value should be an object with keys id and data");this._setPrivateFrame(e.id,e.data);break;default:throw new Error("Unsupported frame "+t)}return this},t.removeTag=function(){if(!(this.arrayBuffer.byteLength<10)){var t,e,r=new Uint8Array(this.arrayBuffer),n=r[3],i=((t=[r[6],r[7],r[8],r[9]])[0]<<21)+(t[1]<<14)+(t[2]<<7)+t[3]+10;73!==(e=r)[0]||68!==e[1]||51!==e[2]||n<2||4<n||(this.arrayBuffer=new Uint8Array(r.subarray(i)).buffer)}},t.addTag=function(){this.removeTag();var t,n=[255,254],i=10+this.frames.reduce((function(t,e){return t+e.size}),0)+this.padding,o=new ArrayBuffer(this.arrayBuffer.byteLength+i),a=new Uint8Array(o),s=0,u=[];return u=[73,68,51,3],a.set(u,s),s+=u.length,s++,s++,u=[(t=i-10)>>>21&127,t>>>14&127,t>>>7&127,127&t],a.set(u,s),s+=u.length,this.frames.forEach((function(t){var i;switch(u=e(t.name),a.set(u,s),s+=u.length,i=t.size-10,u=[i>>>24&255,i>>>16&255,i>>>8&255,255&i],a.set(u,s),s+=u.length,s+=2,t.name){case"WCOM":case"WCOP":case"WOAF":case"WOAR":case"WOAS":case"WORS":case"WPAY":case"WPUB":u=e(t.value),a.set(u,s),s+=u.length;break;case"TPE1":case"TCOM":case"TCON":case"TLAN":case"TIT1":case"TIT2":case"TIT3":case"TALB":case"TPE2":case"TPE3":case"TPE4":case"TRCK":case"TPOS":case"TKEY":case"TMED":case"TPUB":case"TCOP":case"TEXT":case"TSRC":u=[1].concat(n),a.set(u,s),s+=u.length,u=r(t.value),a.set(u,s),s+=u.length;break;case"TXXX":case"USLT":case"COMM":u=[1],"USLT"!==t.name&&"COMM"!==t.name||(u=u.concat(t.language)),u=u.concat(n),a.set(u,s),s+=u.length,u=r(t.description),a.set(u,s),s+=u.length,u=[0,0].concat(n),a.set(u,s),s+=u.length,u=r(t.value),a.set(u,s),s+=u.length;break;case"TBPM":case"TLEN":case"TDAT":case"TYER":s++,u=e(t.value),a.set(u,s),s+=u.length;break;case"PRIV":u=e(t.id),a.set(u,s),s+=u.length,s++,a.set(new Uint8Array(t.value),s),s+=t.value.byteLength;break;case"APIC":u=[t.useUnicodeEncoding?1:0],a.set(u,s),s+=u.length,u=e(t.mimeType),a.set(u,s),s+=u.length,u=[0,t.pictureType],a.set(u,s),s+=u.length,t.useUnicodeEncoding?(u=[].concat(n),a.set(u,s),s+=u.length,u=r(t.description),a.set(u,s),s+=u.length,s+=2):(u=e(t.description),a.set(u,s),s+=u.length,s++),a.set(new Uint8Array(t.value),s),s+=t.value.byteLength}})),s+=this.padding,a.set(new Uint8Array(this.arrayBuffer),s),this.arrayBuffer=o},t.getBlob=function(){return new Blob([this.arrayBuffer],{type:"audio/mpeg"})},t.getURL=function(){return this.url||(this.url=URL.createObjectURL(this.getBlob())),this.url},t.revokeURL=function(){URL.revokeObjectURL(this.url)},n}()}()}]);