wavefile/dist/wavefile.js

Create, read and write wav files according to the specs.

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parseInt(d,2)?NaN:Infinity*e;0===f?(f+=1,c=parseInt(d,2)):c=parseInt("1"+d,2);return e*c*this.j*Math.pow(2,f-this.a)};H.prototype.l=function(a,b,c,d,e){var f=[];f.push(c);for(c=this.b;0<c;--c)f[c]=d%2?1:0,d=Math.floor(d/2);d=f.length;for(c=this.c;0<c;--c)f[d+c]=e%2?1:0,e=Math.floor(e/2);e=f.join("");f=this.offset+b-1;for(d=b;f>=b;)a[f]=parseInt(e.substring(0,8),2),e=e.substring(8),f--,d++;return d};B.prototype.va=function(a){this.c=0;this.container=this.u(a,4);if(-1===this.Z.indexOf(this.container))throw Error("Not a supported format.");
this.a.o="RIFX"===this.container;this.chunkSize=this.b(a);this.format=this.u(a,4);this.Y={chunkId:this.container,chunkSize:this.chunkSize,format:this.format,subChunks:this.V(a)}};B.prototype.s=function(a,b){b=void 0===b?!1:b;for(var c=this.Y.subChunks,d=[],e=0;e<c.length;e++)if(c[e].chunkId==a)if(b)d.push(c[e]);else return c[e];return"LIST"==a?d.length?d:null:null};B.prototype.u=function(a,b){var c=G(a,this.c,this.c+b);this.c+=b;return c};B.prototype.b=function(a){a=M(a,this.a,this.c);this.c+=4;return a};
B.prototype.V=function(a){for(var b=[],c=this.c;c<=a.length-8;)b.push(this.$a(a,c)),c+=8+b[b.length-1].chunkSize,c=c%2?c+1:c;return b};B.prototype.$a=function(a,b){var c={chunkId:this.Ea(a,b),chunkSize:this.Fa(a,b)};"LIST"==c.chunkId?(c.format=G(a,b+8,b+12),this.c+=4,c.subChunks=this.V(a)):(this.c=b+8+(c.chunkSize%2?c.chunkSize+1:c.chunkSize),c.chunkData={start:b+8,end:this.c});return c};B.prototype.Ea=function(a,b){this.c+=4;return G(a,b,b+4)};B.prototype.Fa=function(a,b){this.c+=4;return M(a,this.a,
b+4)};P(u,B);u.prototype.fromBuffer=function(a,b){b=void 0===b?!0:b;this.U();this.va(a);this.g.o=this.a.o;if("WAVE"!=this.format)throw Error('Could not find the "WAVE" format identifier');this.hb(a);this.jb(a);this.ib(a);this.eb(a);this.qa(a);this.fb(a);this.ma(a);this.gb(a,b);this.lb(a);this.ia(a);this.na(a)};u.prototype.U=function(){var a=new u;Object.assign(this.fmt,a.fmt);Object.assign(this.fact,a.fact);Object.assign(this.cue,a.cue);Object.assign(this.smpl,a.smpl);Object.assign(this.bext,a.bext);
Object.assign(this.iXML,a.iXML);Object.assign(this.ds64,a.ds64);Object.assign(this.data,a.data);this.LIST=[];Object.assign(this.junk,a.junk);Object.assign(this._PMX,a._PMX)};u.prototype.jb=function(a){var b=this.s("fmt ");if(b)this.c=b.chunkData.start,this.fmt.chunkId=b.chunkId,this.fmt.chunkSize=b.chunkSize,this.fmt.audioFormat=this.j(a),this.fmt.numChannels=this.j(a),this.fmt.sampleRate=this.b(a),this.fmt.byteRate=this.b(a),this.fmt.blockAlign=this.j(a),this.fmt.bitsPerSample=this.j(a),this.kb(a);
else throw Error('Could not find the "fmt " chunk');};u.prototype.kb=function(a){16<this.fmt.chunkSize&&(this.fmt.cbSize=this.j(a),18<this.fmt.chunkSize&&(this.fmt.validBitsPerSample=this.j(a),20<this.fmt.chunkSize&&(this.fmt.dwChannelMask=this.b(a),this.fmt.subformat=[this.b(a),this.b(a),this.b(a),this.b(a)])))};u.prototype.ib=function(a){var b=this.s("fact");b&&(this.c=b.chunkData.start,this.fact.chunkId=b.chunkId,this.fact.chunkSize=b.chunkSize,this.fact.dwSampleLength=this.b(a))};u.prototype.fb=
function(a){var b=this.s("cue ");if(b)for(this.c=b.chunkData.start,this.cue.chunkId=b.chunkId,this.cue.chunkSize=b.chunkSize,this.cue.dwCuePoints=this.b(a),b=0;b<this.cue.dwCuePoints;b++)this.cue.points.push({dwName:this.b(a),dwPosition:this.b(a),fccChunk:this.u(a,4),dwChunkStart:this.b(a),dwBlockStart:this.b(a),dwSampleOffset:this.b(a)})};u.prototype.ma=function(a){var b=this.s("smpl");if(b)for(this.c=b.chunkData.start,this.smpl.chunkId=b.chunkId,this.smpl.chunkSize=b.chunkSize,this.smpl.dwManufacturer=
this.b(a),this.smpl.dwProduct=this.b(a),this.smpl.dwSamplePeriod=this.b(a),this.smpl.dwMIDIUnityNote=this.b(a),this.smpl.dwMIDIPitchFraction=this.b(a),this.smpl.dwSMPTEFormat=this.b(a),this.smpl.dwSMPTEOffset=this.b(a),this.smpl.dwNumSampleLoops=this.b(a),this.smpl.dwSamplerData=this.b(a),b=0;b<this.smpl.dwNumSampleLoops;b++)this.smpl.loops.push({dwName:this.b(a),dwType:this.b(a),dwStart:this.b(a),dwEnd:this.b(a),dwFraction:this.b(a),dwPlayCount:this.b(a)})};u.prototype.gb=function(a,b){var c=this.s("data");
if(c)this.data.chunkId="data",this.data.chunkSize=c.chunkSize,b&&(this.data.samples=a.slice(c.chunkData.start,c.chunkData.end));else throw Error('Could not find the "data" chunk');};u.prototype.eb=function(a){var b=this.s("bext");b&&(this.c=b.chunkData.start,this.bext.chunkId=b.chunkId,this.bext.chunkSize=b.chunkSize,this.bext.description=this.u(a,256),this.bext.originator=this.u(a,32),this.bext.originatorReference=this.u(a,32),this.bext.originationDate=this.u(a,10),this.bext.originationTime=this.u(a,
8),this.bext.timeReference=[this.b(a),this.b(a)],this.bext.version=this.j(a),this.bext.UMID=this.u(a,64),this.bext.loudnessValue=this.j(a),this.bext.loudnessRange=this.j(a),this.bext.maxTruePeakLevel=this.j(a),this.bext.maxMomentaryLoudness=this.j(a),this.bext.maxShortTermLoudness=this.j(a),this.bext.reserved=this.u(a,180),this.bext.codingHistory=this.u(a,this.bext.chunkSize-602))};u.prototype.qa=function(a){var b=this.s("iXML");b&&(this.c=b.chunkData.start,this.iXML.chunkId=b.chunkId,this.iXML.chunkSize=
b.chunkSize,this.iXML.value=G(a,this.c,this.c+this.iXML.chunkSize))};u.prototype.hb=function(a){var b=this.s("ds64");if(b)this.c=b.chunkData.start,this.ds64.chunkId=b.chunkId,this.ds64.chunkSize=b.chunkSize,this.ds64.riffSizeHigh=this.b(a),this.ds64.riffSizeLow=this.b(a),this.ds64.dataSizeHigh=this.b(a),this.ds64.dataSizeLow=this.b(a),this.ds64.originationTime=this.b(a),this.ds64.sampleCountHigh=this.b(a),this.ds64.sampleCountLow=this.b(a);else if("RF64"==this.container)throw Error('Could not find the "ds64" chunk');
};u.prototype.ia=function(a){var b=this.s("LIST",!0);if(null!==b)for(var c=0;c<b.length;c++){var d=b[c];this.LIST.push({chunkId:d.chunkId,chunkSize:d.chunkSize,format:d.format,subChunks:[]});for(var e=0;e<d.subChunks.length;e++)this.ka(d.subChunks[e],d.format,a)}};u.prototype.ka=function(a,b,c){"adtl"==b?-1<["labl","note","ltxt"].indexOf(a.chunkId)&&this.la(c,a):"INFO"==b&&this.ja(c,a)};u.prototype.la=function(a,b){this.c=b.chunkData.start;var c={chunkId:b.chunkId,chunkSize:b.chunkSize,dwName:this.b(a)};
"ltxt"==b.chunkId?(c.dwSampleLength=this.b(a),c.dwPurposeID=this.b(a),c.dwCountry=this.j(a),c.dwLanguage=this.j(a),c.dwDialect=this.j(a),c.dwCodePage=this.j(a),c.value=""):c.value=this.X(a,this.c);this.LIST[this.LIST.length-1].subChunks.push(c)};u.prototype.ja=function(a,b){this.c=b.chunkData.start;this.LIST[this.LIST.length-1].subChunks.push({chunkId:b.chunkId,chunkSize:b.chunkSize,value:this.X(a,this.c)})};u.prototype.lb=function(a){var b=this.s("junk");b&&(this.junk={chunkId:b.chunkId,chunkSize:b.chunkSize,
chunkData:[].slice.call(a.slice(b.chunkData.start,b.chunkData.end))})};u.prototype.na=function(a){var b=this.s("_PMX");b&&(this.c=b.chunkData.start,this._PMX.chunkId=b.chunkId,this._PMX.chunkSize=b.chunkSize,this._PMX.value=G(a,this.c,this.c+this._PMX.chunkSize))};u.prototype.X=function(a,b){for(var c=b=void 0===b?0:b;c<a.length&&(this.c++,0!==a[c]);c++);return G(a,b,this.c-1)};u.prototype.j=function(a){a=M(a,this.g,this.c);this.c+=2;return a};P(q,u);q.prototype.toBuffer=function(){this.g.o="RIFX"===
this.container;this.a.o=this.g.o;for(var a=[this.Sa(),this.Oa(),this.Da(),this.bb(),this.Qa(),this.Pa(),x(this.data.chunkId),h(this.data.samples.length,this.a),this.data.samples,this.Ga(),this.Ya(),this.Ta(),this.ab()],b=0,c=0;c<a.length;c++)b+=a[c].length;c=new Uint8Array(b+12);var d=T(this.container,c,0);d=L([b+4],this.a,c,void 0===d?0:d);d=T(this.format,c,void 0===d?0:d);for(b=0;b<a.length;b++)c.set(a[b],d),d+=a[b].length;return c};q.prototype.Da=function(){var a=[];this.Ca();this.bext.chunkId&&
(this.bext.chunkSize=602+this.bext.codingHistory.length,a=a.concat(x(this.bext.chunkId),h(602+this.bext.codingHistory.length,this.a),A(this.bext.description,256),A(this.bext.originator,32),A(this.bext.originatorReference,32),A(this.bext.originationDate,10),A(this.bext.originationTime,8),h(this.bext.timeReference[0],this.a),h(this.bext.timeReference[1],this.a),h(this.bext.version,this.g),A(this.bext.UMID,64),h(this.bext.loudnessValue,this.g),h(this.bext.loudnessRange,this.g),h(this.bext.maxTruePeakLevel,
this.g),h(this.bext.maxMomentaryLoudness,this.g),h(this.bext.maxShortTermLoudness,this.g),A(this.bext.reserved,180),A(this.bext.codingHistory,this.bext.codingHistory.length)));this.l(a);return a};q.prototype.Ca=function(){for(var a in this.bext)if(this.bext.hasOwnProperty(a)&&this.bext[a]&&"timeReference"!=a){this.bext.chunkId="bext";break}if(this.bext.timeReference[0]||this.bext.timeReference[1])this.bext.chunkId="bext"};q.prototype.bb=function(){var a=[];if(this.iXML.chunkId){var b=x(this.iXML.value);
this.iXML.chunkSize=b.length;a=a.concat(x(this.iXML.chunkId),h(this.iXML.chunkSize,this.a),b)}this.l(a);return a};q.prototype.Oa=function(){var a=[];this.ds64.chunkId&&(a=a.concat(x(this.ds64.chunkId),h(this.ds64.chunkSize,this.a),h(this.ds64.riffSizeHigh,this.a),h(this.ds64.riffSizeLow,this.a),h(this.ds64.dataSizeHigh,this.a),h(this.ds64.dataSizeLow,this.a),h(this.ds64.originationTime,this.a),h(this.ds64.sampleCountHigh,this.a),h(this.ds64.sampleCountLow,this.a)));this.l(a);return a};q.prototype.Ga=
function(){var a=[];if(this.cue.chunkId){var b=this.Ja();a=a.concat(x(this.cue.chunkId),h(b.length+4,this.a),h(this.cue.dwCuePoints,this.a),b)}this.l(a);return a};q.prototype.Ja=function(){for(var a=[],b=0;b<this.cue.dwCuePoints;b++)a=a.concat(h(this.cue.points[b].dwName,this.a),h(this.cue.points[b].dwPosition,this.a),x(this.cue.points[b].fccChunk),h(this.cue.points[b].dwChunkStart,this.a),h(this.cue.points[b].dwBlockStart,this.a),h(this.cue.points[b].dwSampleOffset,this.a));return a};q.prototype.Ya=
function(){var a=[];if(this.smpl.chunkId){var b=this.Za();a=a.concat(x(this.smpl.chunkId),h(b.length+36,this.a),h(this.smpl.dwManufacturer,this.a),h(this.smpl.dwProduct,this.a),h(this.smpl.dwSamplePeriod,this.a),h(this.smpl.dwMIDIUnityNote,this.a),h(this.smpl.dwMIDIPitchFraction,this.a),h(this.smpl.dwSMPTEFormat,this.a),h(this.smpl.dwSMPTEOffset,this.a),h(this.smpl.dwNumSampleLoops,this.a),h(this.smpl.dwSamplerData,this.a),b)}this.l(a);return a};q.prototype.Za=function(){for(var a=[],b=0;b<this.smpl.dwNumSampleLoops;b++)a=
a.concat(h(this.smpl.loops[b].dwName,this.a),h(this.smpl.loops[b].dwType,this.a),h(this.smpl.loops[b].dwStart,this.a),h(this.smpl.loops[b].dwEnd,this.a),h(this.smpl.loops[b].dwFraction,this.a),h(this.smpl.loops[b].dwPlayCount,this.a));return a};q.prototype.Pa=function(){var a=[];this.fact.chunkId&&(a=a.concat(x(this.fact.chunkId),h(this.fact.chunkSize,this.a),h(this.fact.dwSampleLength,this.a)));this.l(a);return a};q.prototype.Qa=function(){var a=[];if(this.fmt.chunkId)return a=a.concat(x(this.fmt.chunkId),
h(this.fmt.chunkSize,this.a),h(this.fmt.audioFormat,this.g),h(this.fmt.numChannels,this.g),h(this.fmt.sampleRate,this.a),h(this.fmt.byteRate,this.a),h(this.fmt.blockAlign,this.g),h(this.fmt.bitsPerSample,this.g),this.Ra()),this.l(a),a;throw Error('Could not find the "fmt " chunk');};q.prototype.Ra=function(){var a=[];16<this.fmt.chunkSize&&(a=a.concat(h(this.fmt.cbSize,this.g)));18<this.fmt.chunkSize&&(a=a.concat(h(this.fmt.validBitsPerSample,this.g)));20<this.fmt.chunkSize&&(a=a.concat(h(this.fmt.dwChannelMask,
this.a)));24<this.fmt.chunkSize&&(a=a.concat(h(this.fmt.subformat[0],this.a),h(this.fmt.subformat[1],this.a),h(this.fmt.subformat[2],this.a),h(this.fmt.subformat[3],this.a)));return a};q.prototype.Ta=function(){for(var a=[],b=0;b<this.LIST.length;b++){var c=this.Va(this.LIST[b].subChunks,this.LIST[b].format);a=a.concat(x(this.LIST[b].chunkId),h(c.length+4,this.a),x(this.LIST[b].format),c)}this.l(a);return a};q.prototype.Va=function(a,b){for(var c=[],d=0,e=a.length;d<e;d++)"INFO"==b?c=c.concat(this.Ua(a[d])):
"adtl"==b&&(c=c.concat(this.Wa(a[d]))),this.l(c);return c};q.prototype.Ua=function(a){var b=[],c=A(a.value,a.value.length);b=b.concat(x(a.chunkId),h(c.length+1,this.a),c);b.push(0);return b};q.prototype.Wa=function(a){var b=[];if(-1<["labl","note"].indexOf(a.chunkId)){var c=A(a.value,a.value.length);b=b.concat(x(a.chunkId),h(c.length+5,this.a),h(a.dwName,this.a),c);b.push(0)}else"ltxt"==a.chunkId&&(b=b.concat(this.Xa(a)));return b};q.prototype.Xa=function(a){return x(a.chunkId).concat(h(a.value.length+
20,this.a),h(a.dwName,this.a),h(a.dwSampleLength,this.a),h(a.dwPurposeID,this.a),h(a.dwCountry,this.g),h(a.dwLanguage,this.g),h(a.dwDialect,this.g),h(a.dwCodePage,this.g),A(a.value,a.value.length))};q.prototype.ab=function(){var a=[];if(this._PMX.chunkId){var b=x(this._PMX.value);this._PMX.chunkSize=b.length;a=a.concat(x(this._PMX.chunkId),h(this._PMX.chunkSize,this.a),b)}this.l(a);return a};q.prototype.Sa=function(){var a=[];if(this.junk.chunkId)return a.concat(x(this.junk.chunkId),h(this.junk.chunkData.length,
this.a),this.junk.chunkData);this.l(a);return a};q.prototype.l=function(a){a.length%2&&a.push(0)};P(t,q);t.prototype.fromScratch=function(a,b,c,d,e){e=e||{};this.U();this.W(a,b,c,d,e)};t.prototype.fromBuffer=function(a,b){q.prototype.fromBuffer.call(this,a,void 0===b?!0:b);this.ya();this.$()};t.prototype.toBuffer=function(){this.aa();return q.prototype.toBuffer.call(this)};t.prototype.getSamples=function(a,b){a=void 0===a?!1:a;b=void 0===b?Float64Array:b;var c=new b(this.data.samples.length/(this.f.h/
8));E(this.data.samples,this.f,c,0,this.data.samples.length);if(!a&&1<this.fmt.numChannels){var d=this.fmt.numChannels,e=b;e=void 0===e?Float64Array:e;for(var f=[],g=0;g<d;g++)f[g]=new e(c.length/d);for(e=0;e<d;e++){g=e;for(var k=0;g<c.length;g+=d,k++)f[e][k]=c[g]}c=f}return c};t.prototype.getSample=function(a){a*=this.f.h/8;if(a+this.f.h/8>this.data.samples.length)throw Error("Range error");return M(this.data.samples.slice(a,a+this.f.h/8),this.f)};t.prototype.setSample=function(a,b){a*=this.f.h/
8;if(a+this.f.h/8>this.data.samples.length)throw Error("Range error");L([b],this.f,this.data.samples,void 0===a?0:a)};t.prototype.getiXML=function(){return this.iXML.value};t.prototype.setiXML=function(a){if("string"!==typeof a)throw new TypeError("iXML value must be a string.");this.iXML.value=a;this.iXML.chunkId="iXML"};t.prototype.get_PMX=function(){return this._PMX.value};t.prototype.set_PMX=function(a){if("string"!==typeof a)throw new TypeError("_PMX value must be a string.");this._PMX.value=
a;this._PMX.chunkId="_PMX"};t.prototype.W=function(a,b,c,d,e){e.container||(e.container="RIFF");this.container=e.container;this.bitDepth=c;var f=[];if(0<d.length)if(d[0].constructor!==Number){f=new Float64Array(d[0].length*d.length);for(var g=0,k=d[0].length,r=0;g<k;g++)for(var z=0,I=d.length;z<I;z++,r++)f[r]=d[z][g]}else f=d;d=f;this.$();f=this.f.h/8;this.data.samples=new Uint8Array(d.length*f);L(d,this.f,this.data.samples,0);this.cb(c,a,b,f,this.data.samples.length,e);this.data.chunkId="data";this.data.chunkSize=
this.data.samples.length;this.aa()};t.prototype.cb=function(a,b,c,d,e,f){"4"==a?this.za(a,b,c,d,e,f):"8a"==a||"8m"==a?this.Aa(a,b,c,d,e,f):-1==Object.keys(this.G).indexOf(a)||2<b?this.Ba(a,b,c,d,e,f):this.F(a,b,c,d,e,f)};t.prototype.F=function(a,b,c,d,e,f){this.container=f.container;this.chunkSize=36+e;this.format="WAVE";this.bitDepth=a;this.fmt={chunkId:"fmt ",chunkSize:16,audioFormat:this.G[a]||65534,numChannels:b,sampleRate:c,byteRate:b*d*c,blockAlign:b*d,bitsPerSample:parseInt(a,10),cbSize:0,
validBitsPerSample:0,dwChannelMask:0,subformat:[]}};t.prototype.za=function(a,b,c,d,e,f){this.F(a,b,c,d,e,f);this.chunkSize=40+e;this.fmt.chunkSize=20;this.fmt.byteRate=4055;this.fmt.blockAlign=256;this.fmt.bitsPerSample=4;this.fmt.cbSize=2;this.fmt.validBitsPerSample=505;this.fact={chunkId:"fact",chunkSize:4,dwSampleLength:2*e}};t.prototype.Ba=function(a,b,c,d,e,f){this.F(a,b,c,d,e,f);this.chunkSize=60+e;this.fmt.chunkSize=40;this.fmt.bitsPerSample=(parseInt(a,10)-1|7)+1;this.fmt.cbSize=22;this.fmt.validBitsPerSample=
parseInt(a,10);a=this.fmt;c=0;1===b?c=4:2===b?c=3:4===b?c=51:6===b?c=63:8===b&&(c=1599);a.dwChannelMask=c;this.fmt.subformat=[1,1048576,2852126848,1905997824]};t.prototype.Aa=function(a,b,c,d,e,f){this.F(a,b,c,d,e,f);this.chunkSize=40+e;this.fmt.chunkSize=20;this.fmt.cbSize=2;this.fmt.validBitsPerSample=8;this.fact={chunkId:"fact",chunkSize:4,dwSampleLength:e}};t.prototype.ya=function(){3===this.fmt.audioFormat&&32===this.fmt.bitsPerSample?this.bitDepth="32f":6===this.fmt.audioFormat?this.bitDepth=
"8a":7===this.fmt.audioFormat?this.bitDepth="8m":this.bitDepth=this.fmt.bitsPerSample.toString()};t.prototype.wa=function(){if(!(this.G[this.bitDepth]||8<parseInt(this.bitDepth,10)&&54>parseInt(this.bitDepth,10)))throw Error("Invalid bit depth.");};t.prototype.$=function(){this.f={h:(parseInt(this.bitDepth,10)-1|7)+1,R:"32f"==this.bitDepth||"64"==this.bitDepth,O:"8"!=this.bitDepth,o:"RIFX"==this.container};-1<["4","8a","8m"].indexOf(this.bitDepth)&&(this.f.h=8,this.f.O=!1)};t.prototype.aa=function(){this.wa();
var a=this.fmt.numChannels;if(1>a||65535<a*this.fmt.bitsPerSample/8)throw Error("Invalid number of channels.");a=this.fmt.sampleRate;if(1>a||4294967295<this.fmt.bitsPerSample/8*this.fmt.numChannels*a)throw Error("Invalid sample rate.");};P(C,t);C.prototype.getTag=function(a){a=this.P(a);return null!==a.w?this.LIST[a.LIST].subChunks[a.w].value:null};C.prototype.setTag=function(a,b){var c=a;if(c.constructor!==String)throw Error("Invalid tag name.");if(4>c.length)for(var d=0,e=4-c.length;d<e;d++)c+=
" ";a=c;c=this.P(a);null!==c.w?(this.LIST[c.LIST].subChunks[c.w].chunkSize=b.length+1,this.LIST[c.LIST].subChunks[c.w].value=b):null!==c.LIST?this.LIST[c.LIST].subChunks.push({chunkId:a,chunkSize:b.length+1,value:b}):(this.LIST.push({chunkId:"LIST",chunkSize:b.length+9,format:"INFO",subChunks:[]}),this.LIST[this.LIST.length-1].subChunks.push({chunkId:a,chunkSize:b.length+1,value:b}))};C.prototype.deleteTag=function(a){a=this.P(a);return null!==a.w?(this.LIST[a.LIST].subChunks.splice(a.w,1),!0):!1};
C.prototype.listTags=function(){var a=this.C("INFO"),b={};if(null!==a)for(var c=0,d=this.LIST[a].subChunks.length;c<d;c++)b[this.LIST[a].subChunks[c].chunkId]=this.LIST[a].subChunks[c].value;return b};C.prototype.C=function(a){for(var b=0,c=this.LIST.length;b<c;b++)if(this.LIST[b].format==a)return b;return null};C.prototype.P=function(a){for(var b={LIST:null,w:null},c=0,d=this.LIST.length;c<d;c++)if("INFO"==this.LIST[c].format){b.LIST=c;d=0;for(var e=this.LIST[c].subChunks.length;d<e;d++)if(this.LIST[c].subChunks[d].chunkId==
a){b.w=d;break}break}return b};P(w,C);w.prototype.listCuePoints=function(){for(var a=this.J(),b=0,c=a.length;b<c;b++)a[b].position=a[b].dwSampleOffset/this.fmt.sampleRate*1E3,a[b].dwSampleLength?(a[b].end=a[b].dwSampleLength/this.fmt.sampleRate*1E3,a[b].end+=a[b].position):a[b].end=null,delete a[b].value;return a};w.prototype.setCuePoint=function(a){this.cue.chunkId="cue ";a.label||(a.label="");var b=this.J();this.I();this.cue.points=[];a.dwSampleOffset=a.position*this.fmt.sampleRate/1E3;a.dwSampleLength=
0;a.end&&(a.dwSampleLength=a.end*this.fmt.sampleRate/1E3-a.dwSampleOffset);0===b.length?this.B(a,1):this.ra(b,a);this.cue.dwCuePoints=this.cue.points.length};w.prototype.deleteCuePoint=function(a){this.cue.chunkId="cue ";var b=this.J();this.I();var c=this.cue.points.length;this.cue.points=[];for(var d=0;d<c;d++)d+1!==a&&this.B(b[d],d+1);this.cue.dwCuePoints=this.cue.points.length;this.cue.dwCuePoints?this.cue.chunkId="cue ":(this.cue.chunkId="",this.I())};w.prototype.updateLabel=function(a,b){var c=
this.C("adtl");if(null!==c)for(var d=0,e=this.LIST[c].subChunks.length;d<e;d++)this.LIST[c].subChunks[d].dwName==a&&(this.LIST[c].subChunks[d].value=b)};w.prototype.J=function(){for(var a=[],b=0;b<this.cue.points.length;b++){var c=this.cue.points[b],d=this.Na(c.dwName);d.label=d.value?d.value:"";d.dwPosition=c.dwPosition;d.fccChunk=c.fccChunk;d.dwChunkStart=c.dwChunkStart;d.dwBlockStart=c.dwBlockStart;d.dwSampleOffset=c.dwSampleOffset;a.push(d)}return a};w.prototype.Na=function(a){var b=this.C("adtl"),
c={};null!==b&&this.ha(c,b,a);return c};w.prototype.ha=function(a,b,c){for(var d=0,e=this.LIST[b].subChunks.length;d<e;d++)if(this.LIST[b].subChunks[d].dwName==c){var f=this.LIST[b].subChunks[d];a.value=f.value||a.value;a.dwName=f.dwName||0;a.dwSampleLength=f.dwSampleLength||0;a.dwPurposeID=f.dwPurposeID||0;a.dwCountry=f.dwCountry||0;a.dwLanguage=f.dwLanguage||0;a.dwDialect=f.dwDialect||0;a.dwCodePage=f.dwCodePage||0}};w.prototype.B=function(a,b){this.cue.points.push({dwName:b,dwPosition:a.dwPosition?
a.dwPosition:0,fccChunk:a.fccChunk?a.fccChunk:"data",dwChunkStart:a.dwChunkStart?a.dwChunkStart:0,dwBlockStart:a.dwBlockStart?a.dwBlockStart:0,dwSampleOffset:a.dwSampleOffset});this.ta(a,b)};w.prototype.ra=function(a,b){for(var c=!1,d=0;d<a.length;d++)a[d].dwSampleOffset>b.dwSampleOffset&&!c?(this.B(b,d+1),this.B(a[d],d+2),c=!0):this.B(a[d],c?d+2:d+1);c||this.B(b,this.cue.points.length+1)};w.prototype.I=function(){for(var a=0,b=this.LIST.length;a<b;a++)"adtl"==this.LIST[a].format&&this.LIST.splice(a)};
w.prototype.ta=function(a,b){var c=this.C("adtl");null===c&&(this.LIST.push({chunkId:"LIST",chunkSize:4,format:"adtl",subChunks:[]}),c=this.LIST.length-1);this.sa(c,a,b);a.dwSampleLength&&this.ua(c,a,b)};w.prototype.sa=function(a,b,c){this.LIST[a].subChunks.push({chunkId:"labl",chunkSize:4,dwName:c,value:b.label});this.LIST[a].chunkSize+=12};w.prototype.ua=function(a,b,c){this.LIST[a].subChunks.push({chunkId:"ltxt",chunkSize:20,dwName:c,dwSampleLength:b.dwSampleLength,dwPurposeID:b.dwPurposeID||0,
dwCountry:b.dwCountry||0,dwLanguage:b.dwLanguage||0,dwDialect:b.dwDialect||0,dwCodePage:b.dwCodePage||0,value:b.label});this.LIST[a].chunkSize+=28};v.prototype.H=function(a,b){return this.f(Math.round(this.l*a),b)};v.prototype.G=function(a,b){a*=this.l;var c=Math.floor(a);a-=c;return(1-a)*this.f(c,b)+a*this.f(c+1,b)};v.prototype.B=function(a,b){a*=this.l;var c=Math.floor(a),d=[this.m(c,b),this.m(c+1,b)],e=[this.f(c,b),this.f(c+1,b)];a-=c;c=a*a;var f=a*c;return(2*f-3*c+1)*e[0]+(f-2*c+a)*d[0]+(-2*f+
3*c)*e[1]+(f-c)*d[1]};v.prototype.I=function(a,b){a*=this.l;var c=Math.floor(a),d=c+this.v,e=0;for(c=c-this.v+1;c<=d;c++)e+=this.F(a-c)*this.f(c,b);return e};v.prototype.m=function(a,b){return this.J*(this.f(a+1,b)-this.f(a-1,b))/2};v.prototype.f=function(a,b){return 0<=a&&a<this.C?b[a]:0};y.prototype.filter=function(a){this.z.L[this.z.N]=a;for(var b=a=0,c=this.z.L.length;b<c;b++)a+=this.a[b]*this.z.L[(this.z.N+b)%this.z.L.length];this.z.N=(this.z.N+1)%this.z.L.length;return a};y.prototype.reset=
function(){this.z=this.b()};y.prototype.b=function(){for(var a=[],b=0;b<this.a.length-1;b++)a.push(0);return{L:a,N:0}};p.prototype.filter=function(a){for(var b=0,c=this.a.length;b<c;b++)a=this.f(b,a);return a};p.prototype.b=function(a){var b={D:[],A:[]};a=this.c(a,b);b.k=1;b.A.push((1-a.ba)/(2*a.K));b.A.push(2*b.A[0]);b.A.push(b.A[0]);return b};p.prototype.c=function(a,b){var c={},d=2*Math.PI*a.oa/a.pa;c.alpha=Math.sin(d)/(2*a.Q);c.ba=Math.cos(d);c.K=1+c.alpha;b.K=c.K;b.D.push(-2*c.ba/c.K);b.k=1;
b.D.push((1-c.alpha)/c.K);return c};p.prototype.f=function(a,b){var c=b*this.a[a].k-this.a[a].Ha*this.a[a].z[0]-this.a[a].Ia*this.a[a].z[1],d=this.a[a].Ka*c+this.a[a].La*this.a[a].z[0]+this.a[a].Ma*this.a[a].z[1];this.a[a].z[1]=this.a[a].z[0];this.a[a].z[0]=c;return d};p.prototype.reset=function(){for(var a=0;a<this.a.length;a++)this.a[a].z=[0,0]};var Ha={point:!1,linear:!1,cubic:!0,sinc:!0},ia={IIR:16,FIR:71},Ia={IIR:p,FIR:y};P(l,w);l.prototype.toRIFF=function(){var a=new Float64Array(J(this.data.samples.length,
this.f.h/8));E(this.data.samples,this.f,a,0,this.data.samples.length);this.m(this.fmt.numChannels,this.fmt.sampleRate,this.bitDepth,a,{container:"RIFF"})};l.prototype.toRIFX=function(){var a=new Float64Array(J(this.data.samples.length,this.f.h/8));E(this.data.samples,this.f,a,0,this.data.samples.length);this.m(this.fmt.numChannels,this.fmt.sampleRate,this.bitDepth,a,{container:"RIFX"})};l.prototype.toIMAADPCM=function(){if(8E3!==this.fmt.sampleRate)throw Error("Only 8000 Hz files can be compressed as IMA-ADPCM.");
if(1!==this.fmt.numChannels)throw Error("Only mono files can be compressed as IMA-ADPCM.");this.H();var a=new Int16Array(J(this.data.samples.length,2));E(this.data.samples,this.f,a,0,this.data.samples.length);this.m(this.fmt.numChannels,this.fmt.sampleRate,"4",wa(a),{container:this.v()})};l.prototype.fromIMAADPCM=function(a){a=void 0===a?"16":a;this.m(this.fmt.numChannels,this.fmt.sampleRate,"16",ya(this.data.samples,this.fmt.blockAlign),{container:this.v()});"16"!=a&&this.toBitDepth(a)};l.prototype.toALaw=
function(){this.H();var a=new Int16Array(J(this.data.samples.length,2));E(this.data.samples,this.f,a,0,this.data.samples.length);this.m(this.fmt.numChannels,this.fmt.sampleRate,"8a",Aa(a),{container:this.v()})};l.prototype.fromALaw=function(a){a=void 0===a?"16":a;this.m(this.fmt.numChannels,this.fmt.sampleRate,"16",Ca(this.data.samples),{container:this.v()});"16"!=a&&this.toBitDepth(a)};l.prototype.toMuLaw=function(){this.H();var a=new Int16Array(J(this.data.samples.length,2));E(this.data.samples,
this.f,a,0,this.data.samples.length);this.m(this.fmt.numChannels,this.fmt.sampleRate,"8m",Da(a),{container:this.v()})};l.prototype.fromMuLaw=function(a){a=void 0===a?"16":a;this.m(this.fmt.numChannels,this.fmt.sampleRate,"16",Fa(this.data.samples),{container:this.v()});"16"!=a&&this.toBitDepth(a)};l.prototype.toBitDepth=function(a,b){var c=a,d=this.bitDepth;void 0===b||b||("32f"!=a&&(c=this.f.h.toString()),d=""+this.f.h);this.T();var e=this.getSamples(!0),f=new Float64Array(e.length),g=d;if(-1<["32f",
"64"].indexOf(g)&&-1<["32f","64"].indexOf(c))f.set(e);else{X(g);X(c);d=va(g,c);var k={fa:Math.pow(2,parseInt(g,10))/2,da:Math.pow(2,parseInt(c,10))/2,ea:Math.pow(2,parseInt(g,10))/2-1,ca:Math.pow(2,parseInt(c,10))/2-1};Y(g,e,!0);g=0;for(var r=e.length;g<r;g++)f[g]=d(e[g],k);Y(c,f,!1)}this.m(this.fmt.numChannels,this.fmt.sampleRate,a,f,{container:this.v()})};l.prototype.toSampleRate=function(a,b){this.xa(a);var c=this.getSamples(),d=[];if(c.constructor===Float64Array)d=ha(c,this.fmt.sampleRate,a,b);
else for(var e=0;e<c.length;e++)d.push(ha(c[e],this.fmt.sampleRate,a,b));this.m(this.fmt.numChannels,a,this.bitDepth,d,{container:this.v()})};l.prototype.xa=function(a){if(1>a||4294967295<this.fmt.bitsPerSample/8*this.fmt.numChannels*a)throw Error("Invalid sample rate.");if(-1<["4","8a","8m"].indexOf(this.bitDepth))throw Error("wavefile can't change the sample rate of compressed files.");};l.prototype.H=function(){this.T();"16"!=this.bitDepth&&this.toBitDepth("16")};l.prototype.T=function(){"8a"==
this.bitDepth?this.fromALaw():"8m"==this.bitDepth?this.fromMuLaw():"4"==this.bitDepth&&this.fromIMAADPCM()};l.prototype.v=function(){return"RF64"==this.container?"RIFF":this.container};l.prototype.m=function(a,b,c,d,e){var f=new w;Object.assign(this.fmt,f.fmt);Object.assign(this.fact,f.fact);Object.assign(this.ds64,f.ds64);Object.assign(this.data,f.data);this.W(a,b,c,d,e)};P(m,l);m.prototype.fromBase64=function(a){this.fromBuffer(ra(a))};m.prototype.toBase64=function(){for(var a=this.toBuffer(),b=
"",c=0;c<a.length;c+=3)b+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[a[c]>>2],b+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[(a[c]&3)<<4|a[c+1]>>4],b+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[(a[c+1]&15)<<2|a[c+2]>>6],b+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[a[c+2]&63];2===a.length%3?b=b.substring(0,b.length-1)+"=":1===a.length%3&&(b=b.substring(0,b.length-2)+"==");return b};m.prototype.toDataURI=
function(){return"data:audio/wav;base64,"+this.toBase64()};m.prototype.fromDataURI=function(a){this.fromBase64(a.replace("data:audio/wav;base64,",""))};n.WaveFile=m;Object.defineProperty(n,"__esModule",{value:!0})}"object"===typeof exports&&"undefined"!==typeof module?W(exports):"function"===typeof define&&define.amd?define(["exports"],W):(V=V||self,W(V.wavefile={}));