wavefile-creator
Version:
Read and write wav files.
61 lines (60 loc) • 28.8 kB
JavaScript
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dwChannelMask:0,subformat:[]};c.fact={chunkId:"",chunkSize:0,dwSampleLength:0};c.cue={chunkId:"",chunkSize:0,dwCuePoints:0,points:[]};c.smpl={chunkId:"",chunkSize:0,dwManufacturer:0,dwProduct:0,dwSamplePeriod:0,dwMIDIUnityNote:0,dwMIDIPitchFraction:0,dwSMPTEFormat:0,dwSMPTEOffset:0,dwNumSampleLoops:0,dwSamplerData:0,loops:[]};c.bext={chunkId:"",chunkSize:0,description:"",originator:"",originatorReference:"",originationDate:"",originationTime:"",timeReference:[0,0],version:0,UMID:"",loudnessValue:0,
loudnessRange:0,maxTruePeakLevel:0,maxMomentaryLoudness:0,maxShortTermLoudness:0,reserved:"",codingHistory:""};c.ds64={chunkId:"",chunkSize:0,riffSizeHigh:0,riffSizeLow:0,dataSizeHigh:0,dataSizeLow:0,originationTime:0,sampleCountHigh:0,sampleCountLow:0};c.data={chunkId:"",chunkSize:0,samples:new Uint8Array(0)};c.LIST=[];c.junk={chunkId:"",chunkSize:0,chunkData:[]};c.uInt16={bits:16,be:!1,signed:!1,fp:!1};a&&c.fromBuffer(a,b);return c};$jscomp.inherits(n,u);n.prototype.fromBuffer=function(a,b){b=void 0===
b?!0:b;this.clearHeaders();this.setSignature(a);this.uInt16.be=this.uInt32.be;if("WAVE"!=this.format)throw Error('Could not find the "WAVE" format identifier');this.readDs64Chunk_(a);this.readFmtChunk_(a);this.readFactChunk_(a);this.readBextChunk_(a);this.readCueChunk_(a);this.readSmplChunk_(a);this.readDataChunk_(a,b);this.readJunkChunk_(a);this.readLISTChunk_(a)};n.prototype.clearHeaders=function(){var a=new n;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.ds64,a.ds64);Object.assign(this.data,a.data);this.LIST=[];Object.assign(this.junk,a.junk)};n.prototype.readFmtChunk_=function(a){var b=this.findChunk("fmt ");if(b)this.head=b.chunkData.start,this.fmt.chunkId=b.chunkId,this.fmt.chunkSize=b.chunkSize,this.fmt.audioFormat=this.readUInt16_(a),this.fmt.numChannels=this.readUInt16_(a),this.fmt.sampleRate=this.readUInt32(a),this.fmt.byteRate=this.readUInt32(a),this.fmt.blockAlign=
this.readUInt16_(a),this.fmt.bitsPerSample=this.readUInt16_(a),this.readFmtExtension_(a);else throw Error('Could not find the "fmt " chunk');};n.prototype.readFmtExtension_=function(a){16<this.fmt.chunkSize&&(this.fmt.cbSize=this.readUInt16_(a),18<this.fmt.chunkSize&&(this.fmt.validBitsPerSample=this.readUInt16_(a),20<this.fmt.chunkSize&&(this.fmt.dwChannelMask=this.readUInt32(a),this.fmt.subformat=[this.readUInt32(a),this.readUInt32(a),this.readUInt32(a),this.readUInt32(a)])))};n.prototype.readFactChunk_=
function(a){var b=this.findChunk("fact");b&&(this.head=b.chunkData.start,this.fact.chunkId=b.chunkId,this.fact.chunkSize=b.chunkSize,this.fact.dwSampleLength=this.readUInt32(a))};n.prototype.readCueChunk_=function(a){var b=this.findChunk("cue ");if(b)for(this.head=b.chunkData.start,this.cue.chunkId=b.chunkId,this.cue.chunkSize=b.chunkSize,this.cue.dwCuePoints=this.readUInt32(a),b=0;b<this.cue.dwCuePoints;b++)this.cue.points.push({dwName:this.readUInt32(a),dwPosition:this.readUInt32(a),fccChunk:this.readString(a,
4),dwChunkStart:this.readUInt32(a),dwBlockStart:this.readUInt32(a),dwSampleOffset:this.readUInt32(a)})};n.prototype.readSmplChunk_=function(a){var b=this.findChunk("smpl");if(b)for(this.head=b.chunkData.start,this.smpl.chunkId=b.chunkId,this.smpl.chunkSize=b.chunkSize,this.smpl.dwManufacturer=this.readUInt32(a),this.smpl.dwProduct=this.readUInt32(a),this.smpl.dwSamplePeriod=this.readUInt32(a),this.smpl.dwMIDIUnityNote=this.readUInt32(a),this.smpl.dwMIDIPitchFraction=this.readUInt32(a),this.smpl.dwSMPTEFormat=
this.readUInt32(a),this.smpl.dwSMPTEOffset=this.readUInt32(a),this.smpl.dwNumSampleLoops=this.readUInt32(a),this.smpl.dwSamplerData=this.readUInt32(a),b=0;b<this.smpl.dwNumSampleLoops;b++)this.smpl.loops.push({dwName:this.readUInt32(a),dwType:this.readUInt32(a),dwStart:this.readUInt32(a),dwEnd:this.readUInt32(a),dwFraction:this.readUInt32(a),dwPlayCount:this.readUInt32(a)})};n.prototype.readDataChunk_=function(a,b){var c=this.findChunk("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');};n.prototype.readBextChunk_=function(a){var b=this.findChunk("bext");b&&(this.head=b.chunkData.start,this.bext.chunkId=b.chunkId,this.bext.chunkSize=b.chunkSize,this.bext.description=this.readString(a,256),this.bext.originator=this.readString(a,32),this.bext.originatorReference=this.readString(a,32),this.bext.originationDate=this.readString(a,10),this.bext.originationTime=this.readString(a,
8),this.bext.timeReference=[this.readUInt32(a),this.readUInt32(a)],this.bext.version=this.readUInt16_(a),this.bext.UMID=this.readString(a,64),this.bext.loudnessValue=this.readUInt16_(a),this.bext.loudnessRange=this.readUInt16_(a),this.bext.maxTruePeakLevel=this.readUInt16_(a),this.bext.maxMomentaryLoudness=this.readUInt16_(a),this.bext.maxShortTermLoudness=this.readUInt16_(a),this.bext.reserved=this.readString(a,180),this.bext.codingHistory=this.readString(a,this.bext.chunkSize-602))};n.prototype.readDs64Chunk_=
function(a){var b=this.findChunk("ds64");if(b)this.head=b.chunkData.start,this.ds64.chunkId=b.chunkId,this.ds64.chunkSize=b.chunkSize,this.ds64.riffSizeHigh=this.readUInt32(a),this.ds64.riffSizeLow=this.readUInt32(a),this.ds64.dataSizeHigh=this.readUInt32(a),this.ds64.dataSizeLow=this.readUInt32(a),this.ds64.originationTime=this.readUInt32(a),this.ds64.sampleCountHigh=this.readUInt32(a),this.ds64.sampleCountLow=this.readUInt32(a);else if("RF64"==this.container)throw Error('Could not find the "ds64" chunk');
};n.prototype.readLISTChunk_=function(a){var b=this.findChunk("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.readLISTSubChunks_(d.subChunks[e],d.format,a)}};n.prototype.readLISTSubChunks_=function(a,b,c){"adtl"==b?-1<["labl","note","ltxt"].indexOf(a.chunkId)&&(this.head=a.chunkData.start,b={chunkId:a.chunkId,chunkSize:a.chunkSize,dwName:this.readUInt32(c)},
"ltxt"==a.chunkId&&(b.dwSampleLength=this.readUInt32(c),b.dwPurposeID=this.readUInt32(c),b.dwCountry=this.readUInt16_(c),b.dwLanguage=this.readUInt16_(c),b.dwDialect=this.readUInt16_(c),b.dwCodePage=this.readUInt16_(c)),b.value=this.readZSTR_(c,this.head),this.LIST[this.LIST.length-1].subChunks.push(b)):"INFO"==b&&(this.head=a.chunkData.start,this.LIST[this.LIST.length-1].subChunks.push({chunkId:a.chunkId,chunkSize:a.chunkSize,value:this.readZSTR_(c,this.head)}))};n.prototype.readJunkChunk_=function(a){var b=
this.findChunk("junk");b&&(this.junk={chunkId:b.chunkId,chunkSize:b.chunkSize,chunkData:[].slice.call(a.slice(b.chunkData.start,b.chunkData.end))})};n.prototype.readZSTR_=function(a,b){for(var c=b=void 0===b?0:b;c<a.length&&(this.head++,0!==a[c]);c++);return l(a,b,this.head-1)};n.prototype.readUInt16_=function(a){a=z(a,this.uInt16,this.head);this.head+=2;return a};var m=function(){return n.apply(this,arguments)||this};$jscomp.inherits(m,n);m.prototype.toBuffer=function(){this.uInt16.be="RIFX"===this.container;
this.uInt32.be=this.uInt16.be;for(var a=[this.getJunkBytes_(),this.getDs64Bytes_(),this.getBextBytes_(),this.getFmtBytes_(),this.getFactBytes_(),p(this.data.chunkId),e(this.data.samples.length,this.uInt32),this.data.samples,this.getCueBytes_(),this.getSmplBytes_(),this.getLISTBytes_()],b=0,c=0;c<a.length;c++)b+=a[c].length;c=new Uint8Array(b+12);var d=A(this.container,c,0);d=D(b+4,this.uInt32,c,d);d=A(this.format,c,d);for(b=0;b<a.length;b++)c.set(a[b],d),d+=a[b].length;return c};m.prototype.getBextBytes_=
function(){var a=[];this.enforceBext_();this.bext.chunkId&&(this.bext.chunkSize=602+this.bext.codingHistory.length,a=a.concat(p(this.bext.chunkId),e(602+this.bext.codingHistory.length,this.uInt32),r(this.bext.description,256),r(this.bext.originator,32),r(this.bext.originatorReference,32),r(this.bext.originationDate,10),r(this.bext.originationTime,8),e(this.bext.timeReference[0],this.uInt32),e(this.bext.timeReference[1],this.uInt32),e(this.bext.version,this.uInt16),r(this.bext.UMID,64),e(this.bext.loudnessValue,
this.uInt16),e(this.bext.loudnessRange,this.uInt16),e(this.bext.maxTruePeakLevel,this.uInt16),e(this.bext.maxMomentaryLoudness,this.uInt16),e(this.bext.maxShortTermLoudness,this.uInt16),r(this.bext.reserved,180),r(this.bext.codingHistory,this.bext.codingHistory.length)));return a};m.prototype.enforceBext_=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"};m.prototype.getDs64Bytes_=function(){var a=[];this.ds64.chunkId&&(a=a.concat(p(this.ds64.chunkId),e(this.ds64.chunkSize,this.uInt32),e(this.ds64.riffSizeHigh,this.uInt32),e(this.ds64.riffSizeLow,this.uInt32),e(this.ds64.dataSizeHigh,this.uInt32),e(this.ds64.dataSizeLow,this.uInt32),e(this.ds64.originationTime,this.uInt32),e(this.ds64.sampleCountHigh,this.uInt32),e(this.ds64.sampleCountLow,this.uInt32)));return a};m.prototype.getCueBytes_=function(){var a=[];if(this.cue.chunkId){var b=this.getCuePointsBytes_();
a=a.concat(p(this.cue.chunkId),e(b.length+4,this.uInt32),e(this.cue.dwCuePoints,this.uInt32),b)}return a};m.prototype.getCuePointsBytes_=function(){for(var a=[],b=0;b<this.cue.dwCuePoints;b++)a=a.concat(e(this.cue.points[b].dwName,this.uInt32),e(this.cue.points[b].dwPosition,this.uInt32),p(this.cue.points[b].fccChunk),e(this.cue.points[b].dwChunkStart,this.uInt32),e(this.cue.points[b].dwBlockStart,this.uInt32),e(this.cue.points[b].dwSampleOffset,this.uInt32));return a};m.prototype.getSmplBytes_=function(){var a=
[];if(this.smpl.chunkId){var b=this.getSmplLoopsBytes_();a=a.concat(p(this.smpl.chunkId),e(b.length+36,this.uInt32),e(this.smpl.dwManufacturer,this.uInt32),e(this.smpl.dwProduct,this.uInt32),e(this.smpl.dwSamplePeriod,this.uInt32),e(this.smpl.dwMIDIUnityNote,this.uInt32),e(this.smpl.dwMIDIPitchFraction,this.uInt32),e(this.smpl.dwSMPTEFormat,this.uInt32),e(this.smpl.dwSMPTEOffset,this.uInt32),e(this.smpl.dwNumSampleLoops,this.uInt32),e(this.smpl.dwSamplerData,this.uInt32),b)}return a};m.prototype.getSmplLoopsBytes_=
function(){for(var a=[],b=0;b<this.smpl.dwNumSampleLoops;b++)a=a.concat(e(this.smpl.loops[b].dwName,this.uInt32),e(this.smpl.loops[b].dwType,this.uInt32),e(this.smpl.loops[b].dwStart,this.uInt32),e(this.smpl.loops[b].dwEnd,this.uInt32),e(this.smpl.loops[b].dwFraction,this.uInt32),e(this.smpl.loops[b].dwPlayCount,this.uInt32));return a};m.prototype.getFactBytes_=function(){var a=[];this.fact.chunkId&&(a=a.concat(p(this.fact.chunkId),e(this.fact.chunkSize,this.uInt32),e(this.fact.dwSampleLength,this.uInt32)));
return a};m.prototype.getFmtBytes_=function(){var a=[];if(this.fmt.chunkId)return a.concat(p(this.fmt.chunkId),e(this.fmt.chunkSize,this.uInt32),e(this.fmt.audioFormat,this.uInt16),e(this.fmt.numChannels,this.uInt16),e(this.fmt.sampleRate,this.uInt32),e(this.fmt.byteRate,this.uInt32),e(this.fmt.blockAlign,this.uInt16),e(this.fmt.bitsPerSample,this.uInt16),this.getFmtExtensionBytes_());throw Error('Could not find the "fmt " chunk');};m.prototype.getFmtExtensionBytes_=function(){var a=[];16<this.fmt.chunkSize&&
(a=a.concat(e(this.fmt.cbSize,this.uInt16)));18<this.fmt.chunkSize&&(a=a.concat(e(this.fmt.validBitsPerSample,this.uInt16)));20<this.fmt.chunkSize&&(a=a.concat(e(this.fmt.dwChannelMask,this.uInt32)));24<this.fmt.chunkSize&&(a=a.concat(e(this.fmt.subformat[0],this.uInt32),e(this.fmt.subformat[1],this.uInt32),e(this.fmt.subformat[2],this.uInt32),e(this.fmt.subformat[3],this.uInt32)));return a};m.prototype.getLISTBytes_=function(){for(var a=[],b=0;b<this.LIST.length;b++){var c=this.getLISTSubChunksBytes_(this.LIST[b].subChunks,
this.LIST[b].format);a=a.concat(p(this.LIST[b].chunkId),e(c.length+4,this.uInt32),p(this.LIST[b].format),c)}return a};m.prototype.getLISTSubChunksBytes_=function(a,b){for(var c=[],d=0;d<a.length;d++)"INFO"==b?(c=c.concat(p(a[d].chunkId),e(a[d].value.length+1,this.uInt32),r(a[d].value,a[d].value.length)),c.push(0)):"adtl"==b&&(-1<["labl","note"].indexOf(a[d].chunkId)?(c=c.concat(p(a[d].chunkId),e(a[d].value.length+4+1,this.uInt32),e(a[d].dwName,this.uInt32),r(a[d].value,a[d].value.length)),c.push(0)):
"ltxt"==a[d].chunkId&&(c=c.concat(this.getLtxtChunkBytes_(a[d])))),c.length%2&&c.push(0);return c};m.prototype.getLtxtChunkBytes_=function(a){return[].concat(p(a.chunkId),e(a.value.length+20,this.uInt32),e(a.dwName,this.uInt32),e(a.dwSampleLength,this.uInt32),e(a.dwPurposeID,this.uInt32),e(a.dwCountry,this.uInt16),e(a.dwLanguage,this.uInt16),e(a.dwDialect,this.uInt16),e(a.dwCodePage,this.uInt16),r(a.value,a.value.length))};m.prototype.getJunkBytes_=function(){var a=[];return this.junk.chunkId?a.concat(p(this.junk.chunkId),
e(this.junk.chunkData.length,this.uInt32),this.junk.chunkData):a};var q=function(a,b){a=void 0===a?null:a;b=void 0===b?!0:b;var c=m.call(this)||this;c.bitDepth="0";c.dataType={be:!1,bits:0,fp:!1,signed:!1};c.WAV_AUDIO_FORMATS={4:17,8:1,"8a":6,"8m":7,16:1,24:1,32:1,"32f":3,64:3};a&&c.fromBuffer(a,b);return c};$jscomp.inherits(q,m);q.prototype.fromBuffer=function(a,b){m.prototype.fromBuffer.call(this,a,void 0===b?!0:b);this.bitDepthFromFmt_();this.updateDataType_()};q.prototype.toBuffer=function(){this.validateWavHeader_();
return m.prototype.toBuffer.call(this)};q.prototype.fromScratch=function(a,b,c,d,e){e=void 0===e?{}:e;this.clearHeaders();this.newWavFile_(a,b,c,d,e)};q.prototype.newWavFile_=function(a,b,c,d,e){e=void 0===e?{}:e;e.container||(e.container="RIFF");this.container=e.container;this.bitDepth=c;if(0<d.length&&d[0].constructor===Array){for(var g=[],f=0,h=d[0].length;f<h;f++)for(var k=0,l=d.length;k<l;k++)g.push(d[k][f]);d=g}this.updateDataType_();g=this.dataType.bits/8;this.data.samples=new Uint8Array(d.length*
g);B(d,this.dataType,this.data.samples);this.makeWavHeader_(c,a,b,g,this.data.samples.length,e);this.data.chunkId="data";this.data.chunkSize=this.data.samples.length;this.validateWavHeader_()};q.prototype.makeWavHeader_=function(a,b,c,d,e,f){"4"==a?this.createADPCMHeader_(a,b,c,d,e,f):"8a"==a||"8m"==a?this.createALawMulawHeader_(a,b,c,d,e,f):-1==Object.keys(this.WAV_AUDIO_FORMATS).indexOf(a)||2<b?this.createExtensibleHeader_(a,b,c,d,e,f):this.createPCMHeader_(a,b,c,d,e,f)};q.prototype.createPCMHeader_=
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.WAV_AUDIO_FORMATS[a]||65534,numChannels:b,sampleRate:c,byteRate:b*d*c,blockAlign:b*d,bitsPerSample:parseInt(a,10),cbSize:0,validBitsPerSample:0,dwChannelMask:0,subformat:[]}};q.prototype.createADPCMHeader_=function(a,b,c,d,e,f){this.createPCMHeader_(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}};q.prototype.createExtensibleHeader_=function(a,b,c,d,e,f){this.createPCMHeader_(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]};q.prototype.createALawMulawHeader_=function(a,b,c,d,e,f){this.createPCMHeader_(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}};q.prototype.bitDepthFromFmt_=function(){this.bitDepth=3===this.fmt.audioFormat&&32===this.fmt.bitsPerSample?"32f":6===this.fmt.audioFormat?"8a":7===this.fmt.audioFormat?"8m":""+this.fmt.bitsPerSample};q.prototype.validateBitDepth_=function(){if(!this.WAV_AUDIO_FORMATS[this.bitDepth]){if(8<
parseInt(this.bitDepth,10)&&54>parseInt(this.bitDepth,10))return!0;throw Error("Invalid bit depth.");}return!0};q.prototype.updateDataType_=function(){this.dataType={bits:(parseInt(this.bitDepth,10)-1|7)+1,fp:"32f"==this.bitDepth||"64"==this.bitDepth,signed:"8"!=this.bitDepth,be:"RIFX"==this.container};-1<["4","8a","8m"].indexOf(this.bitDepth)&&(this.dataType.bits=8,this.dataType.signed=!1)};q.prototype.validateWavHeader_=function(){this.validateBitDepth_();var a=this.fmt.numChannels;a=1>a||65535<
a*this.fmt.bitsPerSample/8?!1:!0;if(!a)throw Error("Invalid number of channels.");a=this.fmt.sampleRate;a=1>a||4294967295<this.fmt.bitsPerSample/8*this.fmt.numChannels*a?!1:!0;if(!a)throw Error("Invalid sample rate.");};d.WaveFileCreator=q;Object.defineProperty(d,"__esModule",{value:!0})});