wavefile - npm Package Compare versions

Comparing version 0.4.2 to 0.4.3

dist/wavefile-min.js

@@ -14,6 +14,6 @@ /*
 
- byte-data
- Readable data to and from bytes.
- Copyright (c) 2017 Rafael da Silva Rocha.
- https://github.com/rochars/byte-data
+ WaveFileInterface
+ Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
+ https://github.com/rochars/wavefile
+
  bitdepth
@@ -24,34 +24,43 @@ Change the bit depth of audio samples to and from 8, 16, 24, 32, 32 IEEE & 64-bit.
 
+ WaveFile
+ Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
+ https://github.com/rochars/wavefile
+
+ byte-data
+ Readable data to and from bytes.
+ Copyright (c) 2017 Rafael da Silva Rocha.
+ https://github.com/rochars/byte-data
 */
-var $jscomp=$jscomp||{};$jscomp.scope={};$jscomp.ASSUME_ES5=!1;$jscomp.ASSUME_NO_NATIVE_MAP=!1;$jscomp.ASSUME_NO_NATIVE_SET=!1;$jscomp.objectCreate=$jscomp.ASSUME_ES5||"function"==typeof Object.create?Object.create:function(a){var k=function(){};k.prototype=a;return new k};$jscomp.underscoreProtoCanBeSet=function(){var a={a:!0},k={};try{return k.__proto__=a,k.a}catch(h){}return!1};
-$jscomp.setPrototypeOf="function"==typeof Object.setPrototypeOf?Object.setPrototypeOf:$jscomp.underscoreProtoCanBeSet()?function(a,k){a.__proto__=k;if(a.__proto__!==k)throw new TypeError(a+" is not extensible");return a}:null;
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-(function(a){function k(f){if(h[f])return h[f].exports;var g=h[f]={i:f,l:!1,exports:{}};a[f].call(g.exports,g,g.exports,k);g.l=!0;return g.exports}var h={};k.m=a;k.c=h;k.d=function(a,g,l){k.o(a,g)||Object.defineProperty(a,g,{configurable:!1,enumerable:!0,get:l})};k.n=function(a){var g=a&&a.__esModule?function(){return a["default"]}:function(){return a};k.d(g,"a",g);return g};k.o=function(a,g){return Object.prototype.hasOwnProperty.call(a,g)};k.p="";return k(k.s=5)})([function(a,k){function h(a,l){var c=
-a.length+1;2==l?c=8:16==l&&(c=2);return f(a,c)}function f(a,f){for(;a.length<f;)a="0"+a;return a}a.exports.fixByteArraySize=function(a,f){var c=0,d=a.length%f;if(d)for(d=-1*(d-f);c<d;)a.push(0),c++};a.exports.padding=function(a,f,c){a[c]=h(a[c],f)};a.exports.paddingNibble=function(a,f,c){2==f&&4>a[c].length&&(a[c]=Array(5-a[c].length).join("0")+a[c])};a.exports.paddingCrumb=function(a,f,c){(2==f||16==f)&&2>a[c].length&&(a[c]="0"+a[c])};a.exports.bytePadding=h;a.exports.lPadZeros=f},function(a,k){function h(a){f[0]=
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-this.format="WAVE"};a.prototype.readFmtChunk_=function(c){var a=f.findString(c,"fmt ");if(-1===a)throw Error(this.WaveErrors["fmt "]);var e={be:"RIFX"==this.chunkId};this.subChunk1Id="fmt ";this.subChunk1Size=f.fromBytes(c.slice(a+4,a+8),32,e)[0];this.audioFormat=f.fromBytes(c.slice(a+8,a+10),16,e)[0];this.numChannels=f.fromBytes(c.slice(a+10,a+12),16,e)[0];this.sampleRate=f.fromBytes(c.slice(a+12,a+16),32,e)[0];this.byteRate=f.fromBytes(c.slice(a+16,a+20),32,e)[0];this.blockAlign=f.fromBytes(c.slice(a+
-20,a+22),16,e)[0];this.bitsPerSample=f.fromBytes(c.slice(a+22,a+24),16,e)[0];this.bitDepth_=3==this.audioFormat&&32==this.bitsPerSample?"32f":this.bitsPerSample.toString()};a.prototype.readFactChunk_=function(a){a=f.findString(a,"fact");if(-1===a&&this.enforceFact)throw Error(this.WaveErrors.fact);-1<a&&(this.factChunkId="fact")};a.prototype.readBextChunk_=function(a){a=f.findString(a,"bext");if(-1===a&&this.enforceBext)throw Error(this.WaveErrors.bext);-1<a&&(this.bextChunkId="bext")};a.prototype.readDataChunk_=
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-c)};a.prototype.checkWriteInput_=function(){this.validateBitDepth_();this.validateNumChannels_();this.validateSampleRate_()};a.prototype.validateBitDepth_=function(){if(!this.headerFormats_[this.bitDepth_])throw Error(this.WaveErrors.bitDepth);return!0};a.prototype.validateNumChannels_=function(){var a=this.numChannels*this.bitsPerSample/8;if(1>this.numChannels||65535<a)throw Error(this.WaveErrors.numChannels);return!0};a.prototype.validateSampleRate_=function(){var a=this.bitsPerSample/8*this.numChannels*
-this.sampleRate;if(1>this.sampleRate||4294967295<a)throw Error(this.WaveErrors.sampleRate);return!0};a.prototype.samplesToBytes_=function(){var a={be:"RIFX"==this.chunkId};32==this.bitsPerSample&&3==this.audioFormat&&(a.float=!0);this.bytes_=f.toBytes(this.samples_,4==this.bitsPerSample?8:this.bitsPerSample,a);this.bytes_.length%2&&this.bytes_.push(0)};a.prototype.createWaveFile_=function(){var a=[];this.factChunkId&&(a=f.toBytes(this.factChunkId,8,{"char":!0}));var d={be:"RIFX"==this.chunkId};return f.toBytes(this.chunkId,
-8,{"char":!0}).concat(f.toBytes([this.chunkSize],32,d),f.toBytes(this.format,8,{"char":!0}),f.toBytes(this.subChunk1Id,8,{"char":!0}),f.toBytes([this.subChunk1Size],32,d),f.toBytes([this.audioFormat],16,d),f.toBytes([this.numChannels],16,d),f.toBytes([this.sampleRate],32,d),f.toBytes([this.byteRate],32,d),f.toBytes([this.blockAlign],16,d),f.toBytes([this.bitsPerSample],16,d),a,f.toBytes(this.subChunk2Id,8,{"char":!0}),f.toBytes([this.subChunk2Size],32,d),this.bytes_)};window.WaveFile=a},function(a,
-k,h){k=h(7);var f=h(9),g=h(11);h=h(2);a.exports.findString=function(a,c){for(var d,e=0;e<a.length;e++)if(d=f.fromBytes(a.slice(e,e+c.length),8,{"char":!0}),d==c)return e;return-1};a.exports.toBytes=k.toBytes;a.exports.fromBytes=f.fromBytes;a.exports.packBooleans=g.packBooleans;a.exports.unpackBooleans=g.unpackBooleans;a.exports.packCrumbs=g.packCrumbs;a.exports.unpackCrumbs=g.unpackCrumbs;a.exports.packNibbles=g.packNibbles;a.exports.unpackNibbles=g.unpackNibbles;a.exports.BitDepthOffsets=h.BitDepthOffsets;
-a.exports.BitDepthMaxValues=h.BitDepthMaxValues},function(a,k,h){function f(a,c,e){4==c?g(a,e,l.paddingNibble):2==c?g(a,e,l.paddingCrumb):1==c?g(a,e,function(){}):g(a,e)}function g(a,c,e){e=void 0===e?l.padding:e;if(10!=c)for(var b=0,d=a.length;b<d;)a[b]=a[b].toString(c),e(a,c,b),b++}h(1);var l=h(0),c=h(3),d=h(8),e=h(2);a.exports.toBytes=function(a,g,h){h=void 0===h?{}:h;var b=10;"base"in h&&(b=h.base);var l=h.char?d.writeString:d["write"+g+"Bit"+(h.float?"Float":"")];for(var k=0,m=0,p=a.length,n=
-[];k<p;)m=l(n,a,k,m),k++;a=n;h.be&&c.endianness(a,e.BitDepthOffsets[g]);f(a,g,b);h.buffer&&(a=new Uint8Array(a));return a}},function(a,k,h){function f(a,d,e,b){a[b++]=d[e]&255;a[b++]=d[e]>>>8&255;a[b++]=d[e]>>>16&255;a[b++]=d[e]>>>24&255;return b}var g=h(4),l=h(1);a.exports.write64Bit=function(a,d,e,b){d=g.toFloat64(d[e]);b=f(a,d,1,b);return f(a,d,0,b)};a.exports.write48Bit=function(a,d,e,b){a[b++]=d[e]&255;a[b++]=d[e]>>8&255;a[b++]=d[e]>>16&255;a[b++]=d[e]>>24&255;a[b++]=d[e]/4294967296&255;a[b++]=
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-7;c<e;)g[d++]=parseInt(a[c].toString(2)+a[c+1].toString(2)+a[c+2].toString(2)+a[c+3].toString(2)+a[c+4].toString(2)+a[c+5].toString(2)+a[c+6].toString(2)+a[c+7].toString(2),2),c+=8;return g};a.exports.unpackBooleans=function(a){for(var g=[],c=0,d=0,e=a.length,b;c<e;)b=f.lPadZeros(a[c].toString(2),8),g[d++]=parseInt(b[0],2),g[d++]=parseInt(b[1],2),g[d++]=parseInt(b[2],2),g[d++]=parseInt(b[3],2),g[d++]=parseInt(b[4],2),g[d++]=parseInt(b[5],2),g[d++]=parseInt(b[6],2),g[d++]=parseInt(b[7],2),c++;return g};
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-b[7],2);c++}return g};a.exports.packNibbles=function(a){var f=[],c=0,d=0,e=a.length;for(e%2&&a.push(0);c<e;)f[d++]=parseInt(a[c].toString(16)+a[c+1].toString(16),16),c+=2;return f};a.exports.unpackNibbles=function(a){for(var f=[],c=0,d=0,e=a.length;c<e;)f[d++]=parseInt(a[c].toString(16)[0],16),f[d++]=parseInt(a[c].toString(16)[1],16),c++;return f}},function(a,k){var h={2:4,4:16,8:256,16:65536,24:16777216,32:4294967296,40:1099511627776,48:281474976710656};a.exports.toBitDepth=function(a,g,k){if(g!=
-k){var c="8 16 24 32 32f 64".split(" ");if(-1==c.indexOf(g)||-1==c.indexOf(k))throw Error("Invalid bit depth.");c=a.length;for(var d=parseInt(h[parseInt(g,10)]/2,10),e=parseInt(h[parseInt(k,10)]/2,10),b=0;b<c;b++)"8"==g&&(a[b]-=128),"32f"==k||"64"==k?"32f"!=g&&"64"!=g&&(a[b]=0<a[b]?a[b]/(d-1):a[b]/d):(a[b]="32f"==g||"64"==g?0<a[b]?a[b]*(e-1):a[b]*e:0<a[b]?parseInt(a[b]/(d-1)*e-1,10):parseInt(a[b]/d*e,10),"8"==k&&(a[b]+=128))}};a.exports.BitDepthMaxValues=h},function(a,k){a.exports.WaveFileHeader=
-function(){this.chunkId="";this.chunkSize=0;this.format=this.subChunk1Id="";this.cbSize=this.bitsPerSample=this.blockAlign=this.byteRate=this.sampleRate=this.numChannels=this.audioFormat=this.subChunk1Size=0;this.factChunkId="";this.factChunkSize=4;this.dwSampleLength=0;this.subChunk2Id="";this.subChunk2Size=0;this.bextChunkId="";this.headerFormats_={4:17,8:1,16:1,24:1,32:1,"32f":3,64:3}}}]);
+var $jscomp=$jscomp||{};$jscomp.scope={};$jscomp.ASSUME_ES5=!1;$jscomp.ASSUME_NO_NATIVE_MAP=!1;$jscomp.ASSUME_NO_NATIVE_SET=!1;$jscomp.objectCreate=$jscomp.ASSUME_ES5||"function"==typeof Object.create?Object.create:function(a){var h=function(){};h.prototype=a;return new h};$jscomp.underscoreProtoCanBeSet=function(){var a={a:!0},h={};try{return h.__proto__=a,h.a}catch(k){}return!1};
+$jscomp.setPrototypeOf="function"==typeof Object.setPrototypeOf?Object.setPrototypeOf:$jscomp.underscoreProtoCanBeSet()?function(a,h){a.__proto__=h;if(a.__proto__!==h)throw new TypeError(a+" is not extensible");return a}:null;
+$jscomp.inherits=function(a,h){a.prototype=$jscomp.objectCreate(h.prototype);a.prototype.constructor=a;if($jscomp.setPrototypeOf){var k=$jscomp.setPrototypeOf;k(a,h)}else for(k in h)if("prototype"!=k)if(Object.defineProperties){var g=Object.getOwnPropertyDescriptor(h,k);g&&Object.defineProperty(a,k,g)}else a[k]=h[k];a.superClass_=h.prototype};
+(function(a){function h(g){if(k[g])return k[g].exports;var l=k[g]={i:g,l:!1,exports:{}};a[g].call(l.exports,l,l.exports,h);l.l=!0;return l.exports}var k={};h.m=a;h.c=k;h.d=function(a,l,e){h.o(a,l)||Object.defineProperty(a,l,{configurable:!1,enumerable:!0,get:e})};h.n=function(a){var l=a&&a.__esModule?function(){return a["default"]}:function(){return a};h.d(l,"a",l);return l};h.o=function(a,l){return Object.prototype.hasOwnProperty.call(a,l)};h.p="";return h(h.s=5)})([function(a,h){function k(a,e){var b=
+a.length+1;2==e?b=8:16==e&&(b=2);return g(a,b)}function g(a,e){for(;a.length<e;)a="0"+a;return a}a.exports.fixByteArraySize=function(a,e){var b=0,c=a.length%e;if(c)for(c=-1*(c-e);b<c;)a.push(0),b++};a.exports.padding=function(a,e,b){a[b]=k(a[b],e)};a.exports.paddingNibble=function(a,e,b){2==e&&4>a[b].length&&(a[b]=Array(5-a[b].length).join("0")+a[b])};a.exports.paddingCrumb=function(a,e,b){(2==e||16==e)&&2>a[b].length&&(a[b]="0"+a[b])};a.exports.bytePadding=k;a.exports.lPadZeros=g},function(a,h){function k(e){g[0]=
+e;return l[0]}h=new Int8Array(4);var g=new Int32Array(h.buffer,0,1),l=new Float32Array(h.buffer,0,1);a.exports=k;a.exports.pack=k;a.exports.unpack=function(e){l[0]=e;return g[0]}},function(a,h){a.exports.BitDepthOffsets={1:1,2:1,4:1,8:1,16:2,24:3,32:4,40:5,48:6,64:8};a.exports.BitDepthMaxValues={2:4,4:16,8:256,16:65536,24:16777216,32:4294967296,40:1099511627776,48:281474976710656}},function(a,h){a.exports.endianness=function(a,g){for(var l=a.length,e=0;e<l;){for(var b,c=a,f=e,d=0,h=g-1,k=parseInt(g/
+2,10);d<k;)b=c[f+d],c[f+d]=c[f+h],c[f+h]=b,d++,h--;e+=g}return a}},function(a,h,k){function g(b,f){f=void 0===f?!1:f;for(var d="",c=0,e=b.length;c<e;){var a=l.lPadZeros(b[c].toString(2),8);d=f?d+a:a+d;c++}return d}var l=k(0),e=new Float32Array(1),b=new Int32Array(e.buffer);a.exports.getBinary=g;a.exports.decodeFloat16=function(b){b=parseInt(g(b,!0),2);var c=(b&31744)>>10,d=b&1023;return(c?Math.pow(2,c-15)*(1+d/1024):d/1024*.00006103515625)*(b>>15?-1:1)};a.exports.decodeFloat64=function(b){if("0,0,0,0,0,0,0,0"==
+b.toString())return 0;b=g(b);for(var c="1"+b.substr(12,52),d=1,e=0,a=0;a<c.length;)e+=d*parseInt(c.charAt(a),10),d/=2,a++;return("1"==b.charAt(0)?-1:1)*e*Math.pow(2,parseInt(b.substr(1,11),2)-1023)};a.exports.toFloat64=function(b){if(0==b)return[0,0];var e=0;0>=b&&(e=2147483648,b=-b);var d=Math.floor(Math.log(b)/Math.log(2)),c=Math.floor(b/Math.pow(2,d)*Math.pow(2,52));b=c&4294967295;c/=Math.pow(2,32);return[e|d+1023<<20|c&1048575,b]};a.exports.toHalf=function(c){e[0]=c;var a=b[0];c=a>>16&32768;var d=
+a>>12&2047;a=a>>23&255;return 103>a?c:(c|a-112<<10|d>>1)+(d&1)}},function(a,h,k){a=k(6);window.WaveFile=a.WaveFile},function(a,h,k){var g=k(7),l=k(8);h=function(e,b,c){b=l.WaveFile.call(this,void 0===b?!1:b,void 0===c?!1:c)||this;e&&b.fromBuffer(e);return b};$jscomp.inherits(h,l.WaveFile);h.prototype.fromScratch=function(e,b,c,a,d){d=void 0===d?{}:d;d.container||(d.container="RIFF");this.isFromScratch_=!0;var f=parseInt(c,10)/8;this.chunkSize=36+a.length*f;this.subChunk1Size=16;this.byteRate=e*f*
+b;this.blockAlign=e*f;this.chunkId=d.container;this.format="WAVE";this.subChunk1Id="fmt ";this.audioFormat=this.headerFormats_[c];this.numChannels=e;this.sampleRate=b;this.bitsPerSample=parseInt(c,10);this.subChunk2Id="data";this.subChunk2Size=a.length*f;this.samples_=a;this.bitDepth_=c};h.prototype.fromBuffer=function(e){this.isFromScratch_=!1;this.readRIFFChunk_(e);this.readWAVEChunk_(e);this.readFmtChunk_(e);this.readFactChunk_(e);this.readBextChunk_(e);this.readDataChunk_(e)};h.prototype.toBuffer=
+function(){this.checkWriteInput_(this.numChannels,this.sampleRate,this.bitDepth_);this.samplesToBytes_();return new Uint8Array(this.createWaveFile_())};h.prototype.toRIFF=function(){this.chunkId="RIFF"};h.prototype.toRIFX=function(){this.chunkId="RIFX"};h.prototype.toBitDepth=function(e){g.toBitDepth(this.samples_,this.bitDepth_,e);this.fromScratch(this.numChannels,this.sampleRate,e,this.samples_,{container:this.chunkId})};h.prototype.interleave=function(){var e=[],b,c,a=this.samples_[0].length;for(b=
+0;b<a;b++)for(c=0;c<this.samples_.length;c++)e.push(this.samples_[c][b]);this.samples_=e};h.prototype.deInterleave=function(){var e=[],b;for(b=0;b<this.numChannels;b++)e[b]=[];b=0;for(var a;b<this.samples_.length;){for(a=0;a<this.numChannels;a++)e[a].push(this.samples_[b+a]);b+=a}this.samples_=e};a.exports.WaveFile=h},function(a,h){var k={8:256,16:65536,24:16777216,32:4294967296};a.exports.toBitDepth=function(a,l,e){if(l!=e){var b="8 16 24 32 32f 64".split(" ");if(-1==b.indexOf(l)||-1==b.indexOf(e))throw Error("Invalid bit depth.");
+b=a.length;for(var c=0;c<b;c++){var f=a[c];"8"==l&&(f-=128);if("32f"==e||"64"==e){var d=l,g=parseInt(k[d]/2,10);"32f"!=d&&"64"!=d&&(f=0<f?f/(g-1):f/g)}else{d=f;g=l;f=e;var h=parseInt(k[g]/2,10),n=parseInt(k[f]/2,10);d="32f"==g||"64"==g?0<d?d*(n-1):d*n:0<d?parseInt(d/(h-1)*n-1,10):parseInt(d/h*n,10);"8"==f&&(d+=128);f=d}a[c]=f}}};a.exports.BitDepthMaxValues=k},function(a,h,k){var g=k(9),l=k(15);h=function(a,b,c){b=void 0===b?!1:b;c=void 0===c?!1:c;a=l.WaveFileHeader.call(this)||this;a.isFromScratch_=
+!1;a.enforceFact=b;a.enforceBext=c;a.WaveErrors={format:"Not a supported format.",wave:"Could not find the 'WAVE' chunk","fmt ":"Could not find the 'fmt ' chunk",data:"Could not find the 'data' chunk",fact:"Could not find the 'fact' chunk",bext:"Could not find the 'bext' chunk",bitDepth:"Invalid bit depth.",numChannels:"Invalid number of channels.",sampleRate:"Invalid sample rate."};a.headerFormats_={4:17,8:1,16:1,24:1,32:1,"32f":3,64:3};a.samples_=[];a.bytes_=[];return a};$jscomp.inherits(h,l.WaveFileHeader);
+h.prototype.readRIFFChunk_=function(a){this.chunkId=g.fromBytes(a.slice(0,4),8,{"char":!0});if("RIFF"!=this.chunkId&&"RIFX"!=this.chunkId)throw Error(this.WaveErrors.format);this.chunkSize=g.fromBytes(a.slice(4,8),32,{be:"RIFX"==this.chunkId})[0]};h.prototype.readWAVEChunk_=function(a){if(-1===g.findString(a,"WAVE"))throw Error(this.WaveErrors.wave);this.format="WAVE"};h.prototype.readFmtChunk_=function(a){var b=g.findString(a,"fmt ");if(-1===b)throw Error(this.WaveErrors["fmt "]);var c={be:"RIFX"==
+this.chunkId};this.subChunk1Id="fmt ";this.subChunk1Size=g.fromBytes(a.slice(b+4,b+8),32,c)[0];this.audioFormat=g.fromBytes(a.slice(b+8,b+10),16,c)[0];this.numChannels=g.fromBytes(a.slice(b+10,b+12),16,c)[0];this.sampleRate=g.fromBytes(a.slice(b+12,b+16),32,c)[0];this.byteRate=g.fromBytes(a.slice(b+16,b+20),32,c)[0];this.blockAlign=g.fromBytes(a.slice(b+20,b+22),16,c)[0];this.bitsPerSample=g.fromBytes(a.slice(b+22,b+24),16,c)[0];this.bitDepth_=3==this.audioFormat&&32==this.bitsPerSample?"32f":this.bitsPerSample.toString()};
+h.prototype.readFactChunk_=function(a){a=g.findString(a,"fact");if(-1===a&&this.enforceFact)throw Error(this.WaveErrors.fact);-1<a&&(this.factChunkId="fact")};h.prototype.readBextChunk_=function(a){a=g.findString(a,"bext");if(-1===a&&this.enforceBext)throw Error(this.WaveErrors.bext);-1<a&&(this.bextChunkId="bext")};h.prototype.readDataChunk_=function(a){var b=g.findString(a,"data");if(-1===b)throw Error(this.WaveErrors.data);this.subChunk2Id="data";this.subChunk2Size=g.fromBytes(a.slice(b+4,b+8),
+32,{be:"RIFX"==this.chunkId})[0];this.samplesFromBytes_(a,b)};h.prototype.samplesFromBytes_=function(a,b){var c={signed:8==this.bitsPerSample?!1:!0,be:"RIFX"==this.chunkId};32==this.bitsPerSample&&3==this.audioFormat&&(c.float=!0);a=a.slice(b+8,b+8+this.subChunk2Size);this.samples_=4==this.bitsPerSample?g.fromBytes(a,8,c):g.fromBytes(a,this.bitsPerSample,c)};h.prototype.checkWriteInput_=function(){this.validateBitDepth_();this.validateNumChannels_();this.validateSampleRate_()};h.prototype.validateBitDepth_=
+function(){if(!this.headerFormats_[this.bitDepth_])throw Error(this.WaveErrors.bitDepth);return!0};h.prototype.validateNumChannels_=function(){var a=this.numChannels*this.bitsPerSample/8;if(1>this.numChannels||65535<a)throw Error(this.WaveErrors.numChannels);return!0};h.prototype.validateSampleRate_=function(){var a=this.bitsPerSample/8*this.numChannels*this.sampleRate;if(1>this.sampleRate||4294967295<a)throw Error(this.WaveErrors.sampleRate);return!0};h.prototype.samplesToBytes_=function(){var a=
+{be:"RIFX"==this.chunkId};32==this.bitsPerSample&&3==this.audioFormat&&(a.float=!0);this.bytes_=g.toBytes(this.samples_,4==this.bitsPerSample?8:this.bitsPerSample,a);this.bytes_.length%2&&this.bytes_.push(0)};h.prototype.createWaveFile_=function(){var a=[];this.factChunkId&&(a=g.toBytes(this.factChunkId,8,{"char":!0}));var b={be:"RIFX"==this.chunkId};return g.toBytes(this.chunkId,8,{"char":!0}).concat(g.toBytes([this.chunkSize],32,b),g.toBytes(this.format,8,{"char":!0}),g.toBytes(this.subChunk1Id,
+8,{"char":!0}),g.toBytes([this.subChunk1Size],32,b),g.toBytes([this.audioFormat],16,b),g.toBytes([this.numChannels],16,b),g.toBytes([this.sampleRate],32,b),g.toBytes([this.byteRate],32,b),g.toBytes([this.blockAlign],16,b),g.toBytes([this.bitsPerSample],16,b),a,g.toBytes(this.subChunk2Id,8,{"char":!0}),g.toBytes([this.subChunk2Size],32,b),this.bytes_)};a.exports.WaveFile=h},function(a,h,k){h=k(10);var g=k(12),l=k(14);k=k(2);a.exports.findString=function(a,b){for(var c,f=0;f<a.length;f++)if(c=g.fromBytes(a.slice(f,
+f+b.length),8,{"char":!0}),c==b)return f;return-1};a.exports.toBytes=h.toBytes;a.exports.fromBytes=g.fromBytes;a.exports.packBooleans=l.packBooleans;a.exports.unpackBooleans=l.unpackBooleans;a.exports.packCrumbs=l.packCrumbs;a.exports.unpackCrumbs=l.unpackCrumbs;a.exports.packNibbles=l.packNibbles;a.exports.unpackNibbles=l.unpackNibbles;a.exports.BitDepthOffsets=k.BitDepthOffsets;a.exports.BitDepthMaxValues=k.BitDepthMaxValues},function(a,h,k){function g(a,b,c){4==b?l(a,c,e.paddingNibble):2==b?l(a,
+c,e.paddingCrumb):1==b?l(a,c,function(){}):l(a,c)}function l(a,b,c){c=void 0===c?e.padding:c;if(10!=b)for(var d=0,f=a.length;d<f;)a[d]=a[d].toString(b),c(a,b,d),d++}k(1);var e=k(0),b=k(3),c=k(11),f=k(2);a.exports.toBytes=function(a,e,l){l=void 0===l?{}:l;var d=10;"base"in l&&(d=l.base);var h=l.char?c.writeString:c["write"+e+"Bit"+(l.float?"Float":"")];for(var k=0,m=0,q=a.length,p=[];k<q;)m=h(p,a,k,m),k++;a=p;l.be&&b.endianness(a,f.BitDepthOffsets[e]);g(a,e,d);l.buffer&&(a=new Uint8Array(a));return a}},
+function(a,h,k){function g(a,c,f,d){a[d++]=c[f]&255;a[d++]=c[f]>>>8&255;a[d++]=c[f]>>>16&255;a[d++]=c[f]>>>24&255;return d}var l=k(4),e=k(1);a.exports.write64Bit=function(a,c,f,d){c=l.toFloat64(c[f]);d=g(a,c,1,d);return g(a,c,0,d)};a.exports.write48Bit=function(a,c,f,d){a[d++]=c[f]&255;a[d++]=c[f]>>8&255;a[d++]=c[f]>>16&255;a[d++]=c[f]>>24&255;a[d++]=c[f]/4294967296&255;a[d++]=c[f]/1099511627776&255;return d};a.exports.write40Bit=function(a,c,f,d){a[d++]=c[f]&255;a[d++]=c[f]>>8&255;a[d++]=c[f]>>16&
+255;a[d++]=c[f]>>24&255;a[d++]=c[f]/4294967296&255;return d};a.exports.write32BitFloat=function(a,c,f,d){c=e.unpack(c[f]);a[d++]=c&255;a[d++]=c>>>8&255;a[d++]=c>>>16&255;a[d++]=c>>>24&255;return d};a.exports.write32Bit=g;a.exports.write24Bit=function(a,c,f,d){a[d++]=c[f]&255;a[d++]=c[f]>>>8&255;a[d++]=c[f]>>>16&255;return d};a.exports.write16Bit=function(a,c,f,d){a[d++]=c[f]&255;a[d++]=c[f]>>>8&255;return d};a.exports.write16BitFloat=function(a,c,f,d){c=l.toHalf(c[f]);a[d++]=c>>>8&255;a[d++]=c&255;
+return d};a.exports.write8Bit=function(a,c,f,d){a[d++]=c[f]&255;return d};a.exports.write4Bit=function(a,c,f,d){a[d++]=c[f]&15;return d};a.exports.write2Bit=function(a,c,f,d){a[d++]=0>c[f]?c[f]+4:c[f];return d};a.exports.write1Bit=function(a,c,f,d){a[d++]=c[f]?1:0;return d};a.exports.writeString=function(a,c,f,d){a[d++]=c.charCodeAt(f);return d}},function(a,h,k){function g(a,d,b,e){var f=[],g=0,h=0,k=c.BitDepthOffsets[d],m=a.length-(k-1);d=c.BitDepthMaxValues[d];for(b=b?l:function(a,d){return a};g<
+m;)f[h]=b(e(a,g),d),g+=k,h++;return f}function l(a,d){a>parseInt(d/2,10)-1&&(a-=d);return a}var e=k(3),b=k(13),c=k(2);a.exports.fromBytes=function(a,d,c){c=void 0===c?{}:c;var f=10;"base"in c&&(f=c.base);c.be&&e.endianness(a,d/8);if(10!=f)for(var l=0,h=a.length;l<h;)a[l]=parseInt(a[l],f),l++;a=g(a,d,c.signed,c.char?b.readChar:b["read"+(2==d||4==d?8:d)+"Bit"+(c.float?"Float":"")]);c.char&&(a=a.join(""));return a}},function(a,h,k){function g(a,d,b){--b;for(var c="";0<=b;)c+=e.bytePadding(a[b+d].toString(2),
+2),b--;return parseInt(c,2)}function l(a,b){return(a[3+b]<<24|a[2+b]<<16|a[1+b]<<8|a[b])>>>0}var e=k(0),b=k(4),c=k(1);a.exports.readChar=function(a,b){return String.fromCharCode(a[b])};a.exports.read1Bit=function(a,b){return parseInt(a[b],2)};a.exports.read8Bit=function(a,b){return a[b]};a.exports.read16Bit=function(a,b){return a[1+b]<<8|a[b]};a.exports.read16BitFloat=function(a,c){return b.decodeFloat16(a.slice(c,c+2))};a.exports.read24Bit=function(a,b){return a[2+b]<<16|a[1+b]<<8|a[b]};a.exports.read32Bit=
+l;a.exports.read32BitFloat=function(a,b){return c.pack(l(a,b))};a.exports.read40Bit=function(a,b){return g(a,b,5)};a.exports.read48Bit=function(a,b){return g(a,b,6)};a.exports.read64Bit=function(a,c){return b.decodeFloat64(a.slice(c,c+8))}},function(a,h,k){var g=k(0);a.exports.packBooleans=function(a){var e=[],b=0,c=0;g.fixByteArraySize(a,8);for(var f=a.length-7;b<f;)e[c++]=parseInt(a[b].toString(2)+a[b+1].toString(2)+a[b+2].toString(2)+a[b+3].toString(2)+a[b+4].toString(2)+a[b+5].toString(2)+a[b+
+6].toString(2)+a[b+7].toString(2),2),b+=8;return e};a.exports.unpackBooleans=function(a){for(var e=[],b=0,c=0,f=a.length,d;b<f;)d=g.lPadZeros(a[b].toString(2),8),e[c++]=parseInt(d[0],2),e[c++]=parseInt(d[1],2),e[c++]=parseInt(d[2],2),e[c++]=parseInt(d[3],2),e[c++]=parseInt(d[4],2),e[c++]=parseInt(d[5],2),e[c++]=parseInt(d[6],2),e[c++]=parseInt(d[7],2),b++;return e};a.exports.packCrumbs=function(a){var e=[],b=0,c=0;g.fixByteArraySize(a,4);for(var f=a.length-3;b<f;)e[c++]=parseInt(g.lPadZeros(a[b].toString(2),
+2)+g.lPadZeros(a[b+1].toString(2),2)+g.lPadZeros(a[b+2].toString(2),2)+g.lPadZeros(a[b+3].toString(2),2),2),b+=4;return e};a.exports.unpackCrumbs=function(a){var e=[],b=0,c=0,f=a.length;for(console.log(f);b<f;){var d=g.lPadZeros(a[b].toString(2),8);e[c++]=parseInt(d[0]+d[1],2);e[c++]=parseInt(d[2]+d[3],2);e[c++]=parseInt(d[4]+d[5],2);e[c++]=parseInt(d[6]+d[7],2);b++}return e};a.exports.packNibbles=function(a){var e=[],b=0,c=0,f=a.length;for(f%2&&a.push(0);b<f;)e[c++]=parseInt(a[b].toString(16)+a[b+
+1].toString(16),16),b+=2;return e};a.exports.unpackNibbles=function(a){for(var e=[],b=0,c=0,f=a.length;b<f;)e[c++]=parseInt(a[b].toString(16)[0],16),e[c++]=parseInt(a[b].toString(16)[1],16),b++;return e}},function(a,h){a.exports.WaveFileHeader=function(){this.chunkId="";this.chunkSize=0;this.format=this.subChunk1Id="";this.cbSize=this.bitsPerSample=this.blockAlign=this.byteRate=this.sampleRate=this.numChannels=this.audioFormat=this.subChunk1Size=0;this.factChunkId="";this.factChunkSize=4;this.dwSampleLength=
+0;this.subChunk2Id="";this.subChunk2Size=0;this.bextChunkId=""}}]);

dist/wavefile.js

@@ -432,10 +432,26 @@ /******/ (function(modules) { // webpackBootstrap
 
-const byteData = __webpack_require__(6);
-const bitDepthLib = __webpack_require__(12);
-const wavefileheader = __webpack_require__(13);
+const wavefile = __webpack_require__(6);
 
+window['WaveFile'] = wavefile.WaveFile;
+
+
+
+/***/ }),
+/* 6 */
+/***/ (function(module, exports, __webpack_require__) {
+
+/*!
+ * WaveFileInterface
+ * Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
+ * https://github.com/rochars/wavefile
+ *
+ */
+
+const bitDepthLib = __webpack_require__(7);
+const wavefile = __webpack_require__(8);
+
 /**
  * A wave file.
  */
-class WaveFile extends wavefileheader.WaveFileHeader {
+class WaveFileInterface extends wavefile.WaveFile {
 
@@ -450,26 +466,3 @@ /**
     constructor(bytes, enforceFact=false, enforceBext=false) {
-        super();
-        /** @type {boolean} */
-        this.isFromScratch_ = false;
-        /** @type {boolean} */
-        this.enforceFact = enforceFact;
-        /** @type {boolean} */
-        this.enforceBext = enforceBext;
-        /**
-         * Error messages.
-         * @enum {string}
-         */
-        this.WaveErrors = {
-            "format": "Not a supported format.",
-            "wave": "Could not find the 'WAVE' chunk",
-            "fmt ": "Could not find the 'fmt ' chunk",
-            "data": "Could not find the 'data' chunk",
-            "fact": "Could not find the 'fact' chunk",
-            "bext": "Could not find the 'bext' chunk",
-            "bitDepth": "Invalid bit depth.",
-            "numChannels": "Invalid number of channels.",
-            "sampleRate": "Invalid sample rate."
-        };
-        this.samples_ = [];
-        this.bytes_ = [];
+        super(enforceFact, enforceBext);
         if(bytes) {
@@ -606,4 +599,239 @@ this.fromBuffer(bytes);
     }
+}
 
+module.exports.WaveFile = WaveFileInterface;
+
+/***/ }),
+/* 7 */
+/***/ (function(module, exports) {
+
+/*!
+ * bitdepth
+ * Change the bit depth of audio samples to and from 8, 16, 24, 32, 32 IEEE & 64-bit.
+ * Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
+ * https://github.com/rochars/bitdepth
+ *
+ */
+
+/**
+ * Max number of different values for each bit depth.
+ * @enum {number}
+ */
+const BitDepthMaxValues = {
+    8: 256,
+    16: 65536,
+    24: 16777216,
+    32: 4294967296
+};
+
+/**
+ * Change the bit depth of the data.
+ * The input array is modified in-place.
+ * @param {!Array<number>} samples The samples.
+ * @param {string} originalBitDepth The original bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ * @param {string} targetBitDepth The new bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ */
+function toBitDepth(samples, originalBitDepth, targetBitDepth) {
+    if (originalBitDepth == targetBitDepth) {
+        return;
+    }
+    validateBitDepths(originalBitDepth, targetBitDepth);
+    let len = samples.length;
+
+    for (let i=0; i<len; i++) {        
+        let sample = samples[i];
+        // 8-bit samples are unsigned;
+        // They are signed here before conversion
+        // (other bit depths are all signed)
+        sample = sign8Bit(sample, originalBitDepth);
+
+        // If it is a float-to-float or int-to-float conversion then
+        // the samples in the target bit depth will be normalized in the
+        // -1.0 to 1.0 range; there is no need to multiply
+        if (targetBitDepth == "32f" || targetBitDepth == "64") {
+            sample = toFloat(sample, originalBitDepth);
+
+        // If it is a float-to-int or int-to-int conversion then the
+        // samples will be de-normalized according to the bit depth
+        }else {
+            sample = toInt(sample, originalBitDepth, targetBitDepth);
+        }
+        samples[i] = sample;
+    }
+}
+
+/**
+ * Sign unsigned 8-bit data.
+ * @param {number} sample The sample.
+ * @param {string} originalBitDepth The original bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ */
+function sign8Bit(sample, originalBitDepth) {
+    if (originalBitDepth == "8") {
+        sample -= 128;
+    }
+    return sample;
+}
+
+/**
+ * Unsign signed 8-bit data.
+ * @param {number} sample The sample.
+ * @param {string} targetBitDepth The target bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ */
+function unsign8Bit(sample, targetBitDepth) {
+    if (targetBitDepth == "8") {
+        sample += 128;
+    }
+    return sample;
+}
+
+/**
+ * Change the bit depth from int to float.
+ * The input array is modified in-place.
+ * @param {number} sample The sample.
+ * @param {string} originalBitDepth The original bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ */
+function toFloat(sample, originalBitDepth) {
+    let oldMaxValue = parseInt((BitDepthMaxValues[originalBitDepth]) / 2, 10);
+    if (originalBitDepth != "32f" && originalBitDepth != "64") {
+        if (sample > 0) {
+            sample = sample / (oldMaxValue - 1);
+        } else {
+            sample = sample / oldMaxValue;
+        }
+    }
+    return sample;
+}
+
+/**
+ * Change the bit depth of the data.
+ * The input array is modified in-place.
+ * @param {number} sample The sample.
+ * @param {string} originalBitDepth The original bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ * @param {string} targetBitDepth The new bit depth of the data.
+ *      One of "8", "16", "24", "32", "32f", "64"
+ */
+function toInt(sample, originalBitDepth, targetBitDepth) {
+    // If the original samples are float, then they are already
+    // normalized between -1.0 and 1.0; All that is need is to
+    // multiply the sample values by the new bit depth max value
+    let oldMaxValue = parseInt((BitDepthMaxValues[originalBitDepth]) / 2, 10);
+    let newMaxValue = parseInt((BitDepthMaxValues[targetBitDepth]) / 2, 10);
+    if (originalBitDepth == "32f" || originalBitDepth == "64" ) {
+        if (sample > 0) {
+            sample = sample * (newMaxValue - 1);
+        } else {
+            sample = sample * newMaxValue;
+        }
+
+    // If the original samples are integers, then they need to be
+    // divided by the maximum values of its original bit depth
+    // (to normalize them between -1.0 and .10) and then multiply
+    // them by the new bit depth max value
+    } else {
+        if (sample > 0) {
+            sample =
+                parseInt((sample / (oldMaxValue - 1)) * newMaxValue - 1, 10);
+        } else {
+            sample = parseInt((sample / oldMaxValue) * newMaxValue, 10);
+        }
+    }
+    
+    // Make the samples unsigned if the target bit depth is "8"
+    return unsign8Bit(sample, targetBitDepth);
+}
+
+/**
+ * Validate the bit depth.
+ * @param {string} originalBitDepth The original bit depth.
+ *     Should be one of "8", "16", "24", "32", "32f", "64".
+ * @param {string} targetBitDepth The target bit depth.
+ *     Should be one of "8", "16", "24", "32", "32f", "64".
+ * @throws {Error} If any argument does not meet the criteria.
+ */
+function validateBitDepths(originalBitDepth, targetBitDepth) {
+    let validBitDepths = ["8", "16", "24", "32", "32f", "64"];
+    if (validBitDepths.indexOf(originalBitDepth) == -1 ||
+        validBitDepths.indexOf(targetBitDepth) == -1) {
+        throw new Error("Invalid bit depth.");
+    }
+    return true;
+}
+
+module.exports.toBitDepth = toBitDepth;
+module.exports.BitDepthMaxValues = BitDepthMaxValues;
+
+
+/***/ }),
+/* 8 */
+/***/ (function(module, exports, __webpack_require__) {
+
+/*!
+ * WaveFile
+ * Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
+ * https://github.com/rochars/wavefile
+ *
+ */
+
+const byteData = __webpack_require__(9);
+const wavefileheader = __webpack_require__(15);
+
+/**
+ * A wave file.
+ */
+class WaveFile extends wavefileheader.WaveFileHeader {
+
     /**
+     * @param {Uint8Array} bytes The file bytes.
+     * @param {boolean} enforceFact True if it should throw a error
+     *      if no "fact" chunk is found.
+     * @param {boolean} enforceBext True if it should throw a error
+     *      if no "bext" chunk is found.
+     */
+    constructor(bytes, enforceFact=false, enforceBext=false) {
+        super();
+        /** @type {boolean} */
+        this.isFromScratch_ = false;
+        /** @type {boolean} */
+        this.enforceFact = enforceFact;
+        /** @type {boolean} */
+        this.enforceBext = enforceBext;
+        /**
+         * Error messages.
+         * @enum {string}
+         */
+        this.WaveErrors = {
+            "format": "Not a supported format.",
+            "wave": "Could not find the 'WAVE' chunk",
+            "fmt ": "Could not find the 'fmt ' chunk",
+            "data": "Could not find the 'data' chunk",
+            "fact": "Could not find the 'fact' chunk",
+            "bext": "Could not find the 'bext' chunk",
+            "bitDepth": "Invalid bit depth.",
+            "numChannels": "Invalid number of channels.",
+            "sampleRate": "Invalid sample rate."
+        };
+        /**
+         * Header formats.
+         * @enum {number}
+         */
+        this.headerFormats_ = {
+            "4": 17,
+            "8": 1,
+            "16": 1,
+            "24": 1,
+            "32": 1,
+            "32f": 3,
+            "64": 3
+        };
+        this.samples_ = [];
+        this.bytes_ = [];
+    }
+    
+    /**
      * Read the RIFF chunk a wave file.
@@ -849,7 +1077,7 @@ * @param {Uint8Array} bytes an array representing the wave file.
 
-window['WaveFile'] = WaveFile;
+module.exports.WaveFile = WaveFile;
 
 
 /***/ }),
-/* 6 */
+/* 9 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -864,5 +1092,5 @@
 
-let toBytes = __webpack_require__(7);
-let fromBytes = __webpack_require__(9);
-let bitPacker = __webpack_require__(11);
+let toBytes = __webpack_require__(10);
+let fromBytes = __webpack_require__(12);
+let bitPacker = __webpack_require__(14);
 let bitDepth = __webpack_require__(2);
@@ -906,3 +1134,3 @@
 /***/ }),
-/* 7 */
+/* 10 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -919,3 +1147,3 @@
 const endianness = __webpack_require__(3);
-const writer = __webpack_require__(8);
+const writer = __webpack_require__(11);
 const bitDepths = __webpack_require__(2);
@@ -1030,3 +1258,3 @@
 /***/ }),
-/* 8 */
+/* 11 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -1148,3 +1376,3 @@
 /***/ }),
-/* 9 */
+/* 12 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -1159,3 +1387,3 @@
 const endianness = __webpack_require__(3);
-const reader = __webpack_require__(10);
+const reader = __webpack_require__(13);
 const bitDepths = __webpack_require__(2);
@@ -1280,3 +1508,3 @@
 /***/ }),
-/* 10 */
+/* 13 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -1444,3 +1672,3 @@
 /***/ }),
-/* 11 */
+/* 14 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -1601,138 +1829,8 @@
 /***/ }),
-/* 12 */
+/* 15 */
 /***/ (function(module, exports) {
 
-/*!
- * bitdepth
- * Change the bit depth of audio samples to and from 8, 16, 24, 32, 32 IEEE & 64-bit.
- * Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
- * https://github.com/rochars/bitdepth
- *
- */
-
-/**
- * Max number of values for each bit depth.
- * @enum {number}
- */
-const BitDepthMaxValues = {
-    2: 4,
-    4: 16,
-    8: 256,
-    16: 65536,
-    24: 16777216,
-    32: 4294967296,
-    40: 1099511627776,
-    48: 281474976710656
-};
-
-/**
- * Change the bit depth of the data.
- * The input array is modified in-place.
- * @param {!Array<number>} data The data.
- * @param {string} originalBitDepth The original bit depth of the data.
- *      One of "8", "16", "24", "32", "32f", "64"
- * @param {string} targetBitDepth The new bit depth of the data.
- *      One of "8", "16", "24", "32", "32f", "64"
- */
-function toBitDepth(data, originalBitDepth, targetBitDepth) {
-    if (originalBitDepth == targetBitDepth) {
-        return;
-    }
-    validateBitDepths(originalBitDepth, targetBitDepth);
-    let len = data.length;
-
-    // Get the max values for both original and target bit depth
-    let oldMaxValue =
-        parseInt((BitDepthMaxValues[parseInt(originalBitDepth, 10)]) / 2, 10);
-    let newMaxValue =
-        parseInt((BitDepthMaxValues[parseInt(targetBitDepth, 10)]) / 2, 10);
-
-    // needs dithering if the target bit depth
-    // is lower than the original bit depth
-    //if (parseInt(targetBitDepth, 10) < parseInt(originalBitDepth, 10)) {
-        // TODO: dithering
-    //}
-
-    for (let i=0; i<len; i++) {
-        
-        // 8-bit samples are unsigned;
-        // They are signed here before conversion
-        // (other bit depths are all signed)
-        if (originalBitDepth == "8") {
-            data[i] -= 128;
-        }
-
-        // If it is a float-to-float or int-to-float conversion then
-        // the samples in the target bit depth will be normalized in the
-        // -1.0 to 1.0 range; there is no need to multiply
-        if (targetBitDepth == "32f" || targetBitDepth == "64") {
-            if (originalBitDepth != "32f" && originalBitDepth != "64") {
-                if (data[i] > 0) {
-                    data[i] = data[i] / (oldMaxValue - 1);
-                } else {
-                    data[i] = data[i] / oldMaxValue;
-                }
-            }
-
-        // If it is a float-to-int or int-to-int conversion then the
-        // samples will be de-normalized according to the bit depth
-        }else {
-            
-            // If the original samples are float, then they are already
-            // normalized between -1.0 and 1.0; All that is need is to
-            // multiply the sample values by the new bit depth max value
-            if (originalBitDepth == "32f" || originalBitDepth == "64" ) {
-                if (data[i] > 0) {
-                    data[i] = data[i] * (newMaxValue - 1);
-                } else {
-                    data[i] = data[i] * newMaxValue;
-                }
-
-            // If the original samples are integers, then they need to be
-            // divided by the maximum values of its original bit depth
-            // (to normalize them between -1.0 and .10) and then multiply
-            // them by the new bit depth max value
-            } else {
-                if (data[i] > 0) {
-                    data[i] = parseInt((data[i] / (oldMaxValue - 1)) * newMaxValue - 1, 10);
-                } else {
-                    data[i] = parseInt((data[i] / oldMaxValue) * newMaxValue, 10);
-                }
-            }
-            
-            // Make the samples unsigned if the target bit depth is "8"
-            if (targetBitDepth == "8") {
-                data[i] += 128;
-            }
-        }  
-    }
-}
-
-/**
- * Validate the bit depth.
- * @param {string} originalBitDepth The original bit depth.
- *     Should be one of "8", "16", "24", "32", "32f", "64".
- * @param {string} targetBitDepth The target bit depth.
- *     Should be one of "8", "16", "24", "32", "32f", "64".
- * @throws {Error} If any argument does not meet the criteria.
- */
-function validateBitDepths(originalBitDepth, targetBitDepth) {
-    let validBitDepths = ["8", "16", "24", "32", "32f", "64"];
-    if (validBitDepths.indexOf(originalBitDepth) == -1 ||
-        validBitDepths.indexOf(targetBitDepth) == -1) {
-        throw new Error("Invalid bit depth.");
-    }
-    return true;
-}
-
-module.exports.toBitDepth = toBitDepth;
-module.exports.BitDepthMaxValues = BitDepthMaxValues;
-
-
-/***/ }),
-/* 13 */
-/***/ (function(module, exports) {
-
 /*
- * wavefileheader.js: WaveFileHeader class
+ * WaveFileHeader class
+ * A structure representing a WAVE file header.
  * Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
@@ -1806,15 +1904,2 @@ * https://github.com/rochars/wavefile
         // TODO bext data
-        /**
-         * Header formats.
-         * @enum {number}
-         */
-        this.headerFormats_ = {
-            "4": 17,
-            "8": 1,
-            "16": 1,
-            "24": 1,
-            "32": 1,
-            "32f": 3,
-            "64": 3
-        };
     }
@@ -1821,0 +1906,0 @@ }

index.js

@@ -9,416 +9,5 @@ /*!
 
-const byteData = require("byte-data");
-const bitDepthLib = require("bitdepth");
-const wavefileheader = require("./src/wavefileheader");
+const wavefile = require("./src/wavefileinterface");
 
-/**
- * A wave file.
- */
-class WaveFile extends wavefileheader.WaveFileHeader {
+module.exports.WaveFile = wavefile.WaveFile;
 
-    /**
-     * @param {Uint8Array} bytes The file bytes.
-     * @param {boolean} enforceFact True if it should throw a error
-     *      if no "fact" chunk is found.
-     * @param {boolean} enforceBext True if it should throw a error
-     *      if no "bext" chunk is found.
-     */
-    constructor(bytes, enforceFact=false, enforceBext=false) {
-        super();
-        /** @type {boolean} */
-        this.isFromScratch_ = false;
-        /** @type {boolean} */
-        this.enforceFact = enforceFact;
-        /** @type {boolean} */
-        this.enforceBext = enforceBext;
-        /**
-         * Error messages.
-         * @enum {string}
-         */
-        this.WaveErrors = {
-            "format": "Not a supported format.",
-            "wave": "Could not find the 'WAVE' chunk",
-            "fmt ": "Could not find the 'fmt ' chunk",
-            "data": "Could not find the 'data' chunk",
-            "fact": "Could not find the 'fact' chunk",
-            "bext": "Could not find the 'bext' chunk",
-            "bitDepth": "Invalid bit depth.",
-            "numChannels": "Invalid number of channels.",
-            "sampleRate": "Invalid sample rate."
-        };
-        this.samples_ = [];
-        this.bytes_ = [];
-        if(bytes) {
-            this.fromBuffer(bytes);
-        }
-    }
-
-    /**
-     * Create a WaveFile object based on the arguments passed.
-     * @param {number} numChannels The number of channels
-     *     (Ints like 1 for mono, 2 stereo and so on).
-     * @param {number} sampleRate The sample rate.
-     *     Integer numbers like 8000, 44100, 48000, 96000, 192000.
-     * @param {string} bitDepth The audio bit depth.
-     *     One of "8", "16", "24", "32", "32f", "64".
-     * @param {!Array<number>} samples Array of samples to be written.
-     *     Samples must be in the correct range according to the bit depth.
-     *     Samples of multi-channel data .
-     */
-    fromScratch(numChannels, sampleRate, bitDepth, samples, options={}) {
-        if (!options.container) {
-            options.container = "RIFF";
-        }
-        this.isFromScratch_ = true;
-        let bytes = parseInt(bitDepth, 10) / 8;
-        this.chunkSize = 36 + samples.length * bytes;
-        this.subChunk1Size = 16;
-        this.byteRate = (numChannels * bytes) * sampleRate;
-        this.blockAlign = numChannels * bytes;
-        this.chunkId = options.container;
-        this.format = "WAVE";
-        this.subChunk1Id = "fmt ";
-        this.audioFormat = this.headerFormats_[bitDepth];
-        this.numChannels = numChannels;
-        this.sampleRate = sampleRate;
-        this.bitsPerSample = parseInt(bitDepth, 10);
-        this.subChunk2Id = "data";
-        this.subChunk2Size = samples.length * bytes;
-        this.samples_ = samples;
-        this.bitDepth_ = bitDepth;
-    }
-
-    /**
-     * Read a wave file from a byte buffer.
-     * @param {Uint8Array} bytes The buffer.
-     */
-    fromBuffer(bytes) {
-        this.isFromScratch_ = false;
-        this.readRIFFChunk_(bytes);
-        this.readWAVEChunk_(bytes);
-        this.readFmtChunk_(bytes);
-        this.readFactChunk_(bytes);
-        this.readBextChunk_(bytes);
-        this.readDataChunk_(bytes);
-    }
-
-    /**
-     * Turn the WaveFile object into a byte buffer.
-     * @return {Uint8Array}
-     */
-    toBuffer() {
-        this.checkWriteInput_(this.numChannels, this.sampleRate, this.bitDepth_);
-        this.samplesToBytes_();
-        return new Uint8Array(this.createWaveFile_());
-    }
-
-    /**
-     * Turn the file to RIFF.
-     * All values will be little-endian when writing.
-     */
-    toRIFF() {
-        this.chunkId = "RIFF";
-    }
-
-    /**
-     * Turn the file to RIFX.
-     * All values but FourCCs will be big-endian when writing.
-     */
-    toRIFX() {
-        this.chunkId = "RIFX";
-    }
-
-    /**
-     * Change the bit depth of the data.
-     * @param {string} bitDepth The new bit depth of the data.
-     *      One of "8", "16", "24", "32", "32f", "64"
-     */
-    toBitDepth(bitDepth) {
-        bitDepthLib.toBitDepth(this.samples_, this.bitDepth_, bitDepth);
-        this.fromScratch(
-            this.numChannels,
-            this.sampleRate,
-            bitDepth,
-            this.samples_,
-            {"container": this.chunkId}
-        );
-    }
-
-    /**
-     * Interleave multi-channel samples.
-     */
-    interleave() {
-        let finalSamples = [];
-        let i;
-        let j;
-        let numChannels = this.samples_[0].length;
-        for (i = 0; i < numChannels; i++) {
-            for (j = 0; j < this.samples_.length; j++) {
-                finalSamples.push(this.samples_[j][i]);
-            }
-        }
-        this.samples_ = finalSamples;
-    }
-
-    /**
-     * De-interleave samples into multiple channels.
-     */
-    deInterleave() {
-        let finalSamples = [];
-        let i;
-        for (i = 0; i < this.numChannels; i++) {
-            finalSamples[i] = [];
-        }
-        i = 0;
-        let j;
-        while (i < this.samples_.length) {
-            for (j = 0; j < this.numChannels; j++) {
-                finalSamples[j].push(this.samples_[i+j]);
-            }
-            i += j;
-        }
-        this.samples_ = finalSamples;
-    }
-
-    /**
-     * Read the RIFF chunk a wave file.
-     * @param {Uint8Array} bytes an array representing the wave file.
-     * @throws {Error} If no "RIFF" chunk is found.
-     */
-    readRIFFChunk_(bytes) {
-        this.chunkId = byteData.fromBytes(bytes.slice(0, 4),
-            8, {"char": true});
-        if (this.chunkId != "RIFF" && this.chunkId != "RIFX") {
-            throw Error(this.WaveErrors.format);
-        }
-        this.chunkSize = byteData.fromBytes(
-            bytes.slice(4, 8), 32, {"be": this.chunkId == "RIFX"})[0];
-    }
-
-    /**
-     * Read the WAVE chunk of a wave file.
-     * @param {Uint8Array} bytes an array representing the wave file.
-     * @throws {Error} If no "WAVE" chunk is found.
-     */
-    readWAVEChunk_(bytes) {
-        let start = byteData.findString(bytes, "WAVE");
-        if (start === -1) {
-            throw Error(this.WaveErrors.wave);
-        }
-        this.format = "WAVE";
-    }
-
-    /**
-     * Read the "fmt " chunk of a wave file.
-     * @param {Uint8Array} bytes an array representing the wave file.
-     * @throws {Error} If no "fmt " chunk is found.
-     */
-    readFmtChunk_(bytes) {
-        let start = byteData.findString(bytes, "fmt ");
-        if (start === -1) {
-            throw Error(this.WaveErrors["fmt "]);
-        }
-        let options = {"be": this.chunkId == "RIFX"};
-        this.subChunk1Id = "fmt ";
-        this.subChunk1Size = byteData.fromBytes(
-            bytes.slice(start + 4, start + 8), 32, options)[0];
-        this.audioFormat = byteData.fromBytes(
-            bytes.slice(start + 8, start + 10), 16, options)[0];
-        this.numChannels = byteData.fromBytes(
-            bytes.slice(start + 10, start + 12), 16, options)[0];
-        this.sampleRate = byteData.fromBytes(
-            bytes.slice(start + 12, start + 16), 32, options)[0];
-        this.byteRate = byteData.fromBytes(
-            bytes.slice(start + 16, start + 20), 32, options)[0];
-        this.blockAlign = byteData.fromBytes(
-            bytes.slice(start + 20, start + 22), 16, options)[0];
-        this.bitsPerSample = byteData.fromBytes(
-            bytes.slice(start + 22, start + 24), 16, options)[0];
-        if (this.audioFormat == 3 && this.bitsPerSample == 32) {
-            this.bitDepth_ = "32f";
-        }else {
-            this.bitDepth_ = this.bitsPerSample.toString();
-        }
-    }
-
-    /**
-     * Read the "fact" chunk of a wave file.
-     * @param {Uint8Array} bytes an array representing the wave file.
-     * @throws {Error} If no "fact" chunk is found.
-     */
-    readFactChunk_(bytes) {
-        let start = byteData.findString(bytes, "fact");
-        if (start === -1 && this.enforceFact) {
-            throw Error(this.WaveErrors.fact);
-        }else if (start > -1) {
-            this.factChunkId = "fact";
-            //this.factChunkSize = byteData.uIntFrom4Bytes(
-            //    bytes.slice(start + 4, start + 8));
-            //this.dwSampleLength = byteData.uIntFrom4Bytes(
-            //    bytes.slice(start + 8, start + 12));
-        }
-    }
-
-    /**
-     * Read the "bext" chunk of a wave file.
-     * @param {Uint8Array} bytes an array representing the wave file.
-     * @throws {Error} If no "bext" chunk is found.
-     */
-    readBextChunk_(bytes) {
-        let start = byteData.findString(bytes, "bext");
-        if (start === -1 && this.enforceBext) {
-            throw Error(this.WaveErrors.bext);
-        }else if (start > -1){
-            this.bextChunkId = "bext";
-        }
-    }
-
-    /**
-     * Read the "data" chunk of a wave file.
-     * @param {Uint8Array} bytes an array representing the wave file.
-     * @throws {Error} If no "data" chunk is found.
-     */
-    readDataChunk_(bytes) {
-        let start = byteData.findString(bytes, "data");
-        if (start === -1) {
-            throw Error(this.WaveErrors.data);
-        }
-        this.subChunk2Id = "data";
-        this.subChunk2Size = byteData.fromBytes(
-            bytes.slice(start + 4, start + 8),
-            32,
-            {"be": this.chunkId == "RIFX"})[0];
-        this.samplesFromBytes_(bytes, start);
-    }
-
-    /**
-     * Find and return the start offset of the data chunk on a wave file.
-     * @param {Uint8Array} bytes Array of bytes representing the wave file.
-     * @param {number} start The offset to start reading.
-     */
-    samplesFromBytes_(bytes, start) {
-        let params = {
-            "signed": this.bitsPerSample == 8 ? false : true,
-            "be": this.chunkId == "RIFX"
-        };
-        if (this.bitsPerSample == 32 && this.audioFormat == 3) {
-            params.float = true;
-        }
-        let samples = bytes.slice(start + 8, start + 8 + this.subChunk2Size);
-        if (this.bitsPerSample == 4) {
-            this.samples_ = byteData.fromBytes(samples, 8, params);
-        } else {
-            this.samples_ = byteData.fromBytes(samples, this.bitsPerSample, params);
-        }
-    }
-
-    /**
-     * Validate the input for wav writing.
-     * @param {number} numChannels The number of channels
-     *     Should be a int greater than zero smaller than the
-     *     channel limit according to the bit depth.
-     * @param {number} sampleRate The sample rate.
-     *     Should be a int greater than zero smaller than the
-     *     channel limit according to the bit depth and number of channels.
-     * @param {string} bitDepth The audio bit depth.
-     *     Should be one of "8", "16", "24", "32", "32f", "64".
-     * @throws {Error} If any argument does not meet the criteria.
-     */
-    checkWriteInput_() {
-        this.validateBitDepth_();
-        this.validateNumChannels_();
-        this.validateSampleRate_();
-    }
-
-    /**
-     * Validate the bit depth.
-     * @param {number} numChannels The number of channels
-     * @param {string} bitDepth The audio bit depth.
-     *     Should be one of "8", "16", "24", "32", "32f", "64".
-     * @throws {Error} If any argument does not meet the criteria.
-     */
-    validateBitDepth_() {
-        if (!this.headerFormats_[this.bitDepth_]) {
-            throw new Error(this.WaveErrors.bitDepth);
-        }
-        return true;
-    }
-
-    /**
-     * Validate the sample rate value.
-     * @param {number} numChannels The number of channels
-     * @param {string} bitDepth The audio bit depth.
-     *     Should be one of "8", "16", "24", "32", "32f", "64".
-     * @throws {Error} If any argument does not meet the criteria.
-     */
-    validateNumChannels_() {
-        let blockAlign = this.numChannels * this.bitsPerSample / 8;
-        if (this.numChannels < 1 || blockAlign > 65535) {
-            throw new Error(this.WaveErrors.numChannels);
-        }
-        return true;
-    }
-
-    /**
-     * Validate the sample rate value.
-     * @param {number} numChannels The number of channels
-     *     Should be a int greater than zero smaller than the
-     *     channel limit according to the bit depth.
-     * @param {number} sampleRate The sample rate.
-     * @param {string} bitDepth The audio bit depth.
-     *     Should be one of "8", "16", "24", "32", "32f", "64".
-     * @throws {Error} If any argument does not meet the criteria.
-     */
-    validateSampleRate_() {
-        let byteRate = this.numChannels *
-            (this.bitsPerSample / 8) * this.sampleRate;
-        if (this.sampleRate < 1 || byteRate > 4294967295) {
-            throw new Error(this.WaveErrors.sampleRate);
-        }
-        return true;
-    }
-
-    /**
-     * Split each sample into bytes.
-     */
-    samplesToBytes_() {
-        let params = {"be": this.chunkId == "RIFX"};
-        if (this.bitsPerSample == 32 && this.audioFormat == 3) {
-            params.float = true;
-        }
-        let bitDepth = this.bitsPerSample == 4 ? 8 : this.bitsPerSample;
-        this.bytes_ = byteData.toBytes(this.samples_, bitDepth, params);
-        if (this.bytes_.length % 2) {
-            this.bytes_.push(0);
-        }
-    }
-
-    /**
-     * Turn a WaveFile object into a file.
-     * @return {Uint8Array} The wav file bytes.
-     */
-    createWaveFile_() {
-        let factVal = [];
-        if (this.factChunkId) {
-            factVal = byteData.toBytes(this.factChunkId, 8, {"char": true});
-        }
-        let options = {"be": this.chunkId == "RIFX"};
-        return byteData.toBytes(this.chunkId, 8, {"char": true}).concat(
-            byteData.toBytes([this.chunkSize], 32, options),
-            byteData.toBytes(this.format, 8, {"char": true}), 
-            byteData.toBytes(this.subChunk1Id, 8, {"char": true}),
-            byteData.toBytes([this.subChunk1Size], 32, options),
-            byteData.toBytes([this.audioFormat], 16, options),
-            byteData.toBytes([this.numChannels], 16, options),
-            byteData.toBytes([this.sampleRate], 32, options),
-            byteData.toBytes([this.byteRate], 32, options),
-            byteData.toBytes([this.blockAlign], 16, options),
-            byteData.toBytes([this.bitsPerSample], 16, options),
-            factVal,
-            byteData.toBytes(this.subChunk2Id, 8, {"char": true}),
-            byteData.toBytes([this.subChunk2Size], 32, options),
-            this.bytes_);
-    }
-}
-
-module.exports.WaveFile = WaveFile;

package.json

 {
   "name": "wavefile",
-  "version": "0.4.2",
+  "version": "0.4.3",
   "description": "Read & write wave files with 8, 16, 24, 32 PCM, 32 IEEE & 64-bit data.",
@@ -57,3 +57,3 @@ "homepage": "https://github.com/rochars/wavefile",
   "dependencies": {
-    "bitdepth": "^1.0.0",
+    "bitdepth": "^1.0.1",
     "byte-data": "^0.4.2"
@@ -60,0 +60,0 @@ },

src/wavefileheader.js

 /*
- * wavefileheader.js: WaveFileHeader class
+ * WaveFileHeader class
+ * A structure representing a WAVE file header.
  * Copyright (c) 2017 Rafael da Silva Rocha. MIT License.
@@ -71,16 +72,3 @@ * https://github.com/rochars/wavefile
         // TODO bext data
-        /**
-         * Header formats.
-         * @enum {number}
-         */
-        this.headerFormats_ = {
-            "4": 17,
-            "8": 1,
-            "16": 1,
-            "24": 1,
-            "32": 1,
-            "32f": 3,
-            "64": 3
-        };
     }
 }

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Improved metrics

Total package byte prevSize

1171868

increased by0.3%

Number of package files

37

increased by5.71%

Lines of code

2914

increased by3.96%

Dependency changes

• Updatedbitdepth@^1.0.1