mirror of
https://github.com/bvanroll/rpiRadio.git
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4 lines
37 KiB
JavaScript
4 lines
37 KiB
JavaScript
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N(this,t,e,!1,r)},i.prototype.copy=function(t,e,r,n){if(r||(r=0),n||0===n||(n=this.length),e>=t.length&&(e=t.length),e||(e=0),n>0&&n<r&&(n=r),n===r)return 0;if(0===t.length||0===this.length)return 0;if(e<0)throw new RangeError("targetStart out of bounds");if(r<0||r>=this.length)throw new RangeError("sourceStart out of bounds");if(n<0)throw new RangeError("sourceEnd out of bounds");n>this.length&&(n=this.length),t.length-e<n-r&&(n=t.length-e+r);var i,o=n-r;if(this===t&&r<e&&e<n)for(i=o-1;i>=0;--i)t[i+e]=this[i+r];else if(o<1e3)for(i=0;i<o;++i)t[i+e]=this[i+r];else Uint8Array.prototype.set.call(t,this.subarray(r,r+o),e);return o},i.prototype.fill=function(t,e,r,n){if("string"==typeof t){if("string"==typeof e?(n=e,e=0,r=this.length):"string"==typeof r&&(n=r,r=this.length),1===t.length){var o=t.charCodeAt(0);o<256&&(t=o)}if(void 0!==n&&"string"!=typeof n)throw new TypeError("encoding must be a string");if("string"==typeof n&&!i.isEncoding(n))throw new TypeError("Unknown encoding: 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i(t,[{key:"readString",value:function(t){for(var e=this.byteOffset,r=0,n="";r<t;r++)n+=String.fromCharCode(this.data[e+r]);return this.byteOffset+=t,n}},{key:"readUint32",value:function(){var t=this.byteOffset,e=this.data[t]<<24|this.data[t+1]<<16|this.data[t+2]<<8|this.data[t+3];return this.byteOffset+=4,e}},{key:"readUint24",value:function(){var t=this.byteOffset,e=this.data[t]<<16|this.data[t+1]<<8|this.data[t+2];return this.byteOffset+=3,e}},{key:"readUint16",value:function(){var t=this.byteOffset,e=this.data[t]<<8|this.data[t+1];return this.byteOffset+=2,e}},{key:"readUint8",value:function(){var t=this.byteOffset,e=this.data[t];return this.byteOffset+=1,e}},{key:"readInt8",value:function(){var t=this.byteOffset,e=this.data[t];return!0&e&&(e^=4294967040),this.byteOffset+=1,e}},{key:"readVarUint",value:function(){var t,e=0;do{t=this.readUint8(),e=(e<<7)+(127&t)}while(128==(128&t));return e}},{key:"skip",value:function(t){this.byteOffset+=t}},{key:"readChunk",value:function(){var t=this.readString(4),e=this.readUint32(),r=this.byteOffset;return this.byteOffset+=e,{id:t,length:e,data:this.data.slice(r,this.byteOffset).buffer}}},{key:"readEvent",value:function(){var t={};t.delta=this.readVarUint();var e=this.readUint8();if(240==(240&e))switch(e){case 255:t.type="meta";var r=this.readUint8(),n=this.readVarUint();switch(r){case 0:t.subType="sequenceNumber",2===n?t.value=this.readUint16():this.skip(n);break;case 1:t.subType="text",t.value=this.readString(n);break;case 2:t.subType="copyrightNotice",t.value=this.readString(n);break;case 3:t.subType="trackName",t.value=this.readString(n);break;case 4:t.subType="instrumentName",t.value=this.readString(n);break;case 5:t.subType="lyrics",t.value=this.readString(n);break;case 6:t.subType="marker",t.value=this.readString(n);break;case 7:t.subType="cuePoint",t.value=this.readString(n);break;case 32:t.subType="midiChannelPrefix",1===n?t.value=this.readUint8():this.skip(n);break;case 47:t.subType="endOfTrack",n>0&&this.skip(n);break;case 81:t.subType="setTempo",3===n?t.value=this.readUint24():this.skip(n);break;case 84:if(t.subType="smpteOffset",5===n){var i=this.readUint8();t.value={frameRate:{0:24,1:25,2:29.97,3:30}[i>>>6],hour:63&i,minute:this.readUint8(),second:this.readUint8(),frame:this.readUint8(),subFrame:this.readUint8()}}else this.skip(n);break;case 88:t.subType="timeSignature",4===n?t.value={numerator:this.readUint8(),denominator:1<<this.readUint8(),metronome:this.readUint8(),thirtyseconds:this.readUint8()}:this.skip(n);break;case 89:t.subType="keySignature",2===n?t.value={key:this.readInt8(),scale:this.readUint8()}:this.skip(n);break;case 127:t.subType="sequencerSpecific",t.value=this.readString(n);break;default:t.subType="unknown",t.value=this.readString(n)}break;case 240:t.type="sysEx";var n=this.readVarUint();t.value=this.readString(n);break;case 247:t.type="dividedSysEx";var n=this.readVarUint();t.value=this.readString(n);break;default:t.type="unknown";var n=this.readVarUint();t.value=this.readString(n)}else{var o;0==(128&e)?(o=e,e=this.lastEventTypeByte):(o=this.readUint8(),this.lastEventTypeByte=e);var a=e>>4;switch(t.channel=15&e,t.type="channel",a){case 8:t.subType="noteOff",t.value={noteNumber:o,velocity:this.readUint8()};break;case 9:t.value={noteNumber:o,velocity:this.readUint8()},0===t.value.velocity?t.subType="noteOff":t.subType="noteOn";break;case 10:t.subType="noteAftertouch",t.value={noteNumber:o,amount:this.readUint8()};break;case 11:t.subType="controller",t.value={controllerNumber:o,controllerValue:this.readUint8()};break;case 12:t.subType="programChange",t.value=o;break;case 13:t.subType="channelAftertouch",t.value=o;break;case 14:t.subType="pitchBend",t.value=o+(this.readUint8()<<7);break;default:t.subType="unknown",t.value=(o<<8)+this.readUint8()}}return t}}]),t}();e.exports=o},{}],6:[function(t,e,r){"use strict";var n=t("./wav"),i=t("./midi"),o=t("./utils/timer");e.exports=function(t){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};e.verbose&&console.log("parsing MIDI header...");var r=new i(t),a=r.readChunk();if("MThd"!==a.id||6!==a.length)throw new SyntaxError("malformed header");for(var s=new i(a.data),u=(s.readUint16(),s.readUint16()),h=s.readUint16(),f=[],l=[],c=[],p=void 0,d=0;d<u;d++){e.verbose&&console.log("parsing track "+(d+1)+"...");var g=r.readChunk();if("MTrk"===g.id){for(var y=new i(g.data),v=[],b=!0;b&&y.byteOffset<g.length;){var w=y.readEvent();if(v.push(w),"string"==typeof w.value&&(e.verbose&&console.log('{"'+w.subType+'":"'+w.value+'"}'),Array.isArray(e.Skip)))for(var m=0;m<e.Skip.length;m++)if(e.Skip[m][w.subType]===w.value){e.verbose&&console.log('skip match found: {"'+w.subType+'":"'+w.value+'"}'),b=!1;break}}"function"==typeof e.Skip&&(b=!e.Skip(v)),b?f.push(v):e.verbose&&console.log("skipping track "+(d+1)+"...")}}if(h>>>15!=0)return console.log("Detected unsupported MIDI timing mode"),null;var k=new o(h);e.verbose&&console.log("initializing timer...");for(var E,S=0,U=0,A=0;S<f[0].length;S++)E=f[0][S],U+=E.delta,A+=E.delta,"setTempo"===E.subType&&(k.addCriticalPoint(U,E.value),U=0);for(var B=0;B<f.length;B++){e.verbose&&console.log("generating progression from track "+(B+1)+"...");for(var T=f[B],C=0,I=new Map,M=0;M<T.length;M++){var x=T[M];if(C+=x.delta,"channel"===x.type){var O=x.value.noteNumber;if("noteOn"===x.subType){var _=x.value.velocity,R=k.getTime(C);I.has(O)?I.get(O).push({offset:R,velocity:_}):I.set(O,[{offset:R,velocity:_}]),c.push({velocity:_,delta:C,note:!0})}else if("noteOff"===x.subType){var P=I.get(O).pop();l.push({note:n.note(O),time:k.getTime(C)-P.offset,amplitude:P.velocity/128,offset:P.offset}),c.push({velocity:P.velocity,delta:C,note:!1})}}else e.verbose&&"meta"===x.type&&"string"==typeof x.value&&console.log(k.getTime(C).toFixed(2)+"s "+x.subType+": "+x.value)}}e.verbose&&console.log("normalizing volume..."),c.sort(function(t,e){return t.delta-e.delta||t.note-e.note}),e.verbose&&(console.log("total notes:",l.length),console.log("total time:",k.getTime(c[c.length-1].delta),"seconds"));var L=1,N=0,D=1,F=0,z=0,j=0,V=!0,q=!1,Y=void 0;try{for(var G,W=c[Symbol.iterator]();!(V=(G=W.next()).done);V=!0){var X=G.value;X.note?(D+=X.velocity,j++,D>L&&(L=D,N=k.getTime(X.delta)),j>F&&(F=j,z=k.getTime(X.delta))):(D-=X.velocity,j--)}}catch(t){q=!0,Y=t}finally{try{!V&&W.return&&W.return()}finally{if(q)throw Y}}p=128/L,e.verbose&&(console.log("setting volume to",p),console.log(" maximum chord of",F,"at",z,"seconds"),console.log(" maximum velocity of",L-1,"at",N,"seconds")),e.channels=1,e.verbose&&console.log("generating WAV buffer...");var J=new n(e.channels,e.sampleRate,e.bitsPerSample);return J.writeProgression(l,p,[0],!0,!0,e.duration),J}},{"./midi":5,"./utils/timer":7,"./wav":8}],7:[function(t,e,r){"use strict";function n(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}var i=function(){function t(t,e){for(var r=0;r<e.length;r++){var n=e[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(t,n.key,n)}}return function(e,r,n){return r&&t(e.prototype,r),n&&t(e,n),e}}(),o=function(){function t(e){n(this,t),this.ticksPerBeat=e,this.criticalPoints=[]}return i(t,[{key:"addCriticalPoint",value:function(t,e){this.criticalPoints.push({delta:t,microsecondsPerBeat:e})}},{key:"getTime",value:function(t){for(var e,r=0,n=5e5,i=0;i<this.criticalPoints.length&&t>0;i++)e=this.criticalPoints[i],t>=e.delta?(r+=e.delta*n/this.ticksPerBeat/1e6,t-=e.delta):(r+=t*n/this.ticksPerBeat/1e6,t=0),n=e.microsecondsPerBeat;return r+=t*n/this.ticksPerBeat/1e6}}]),t}();e.exports=o},{}],8:[function(t,e,r){(function(t){"use strict";function r(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}var n=function(){function t(t,e){var r=[],n=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(n=(a=s.next()).done)&&(r.push(a.value),!e||r.length!==e);n=!0);}catch(t){i=!0,o=t}finally{try{!n&&s.return&&s.return()}finally{if(i)throw o}}return r}return function(e,r){if(Array.isArray(e))return e;if(Symbol.iterator in Object(e))return t(e,r);throw new TypeError("Invalid attempt to destructure non-iterable instance")}}(),i=function(){function t(t,e){for(var r=0;r<e.length;r++){var n=e[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(t,n.key,n)}}return function(e,r,n){return r&&t(e.prototype,r),n&&t(e,n),e}}(),o=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:44100,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:16,o=!(arguments.length>3&&void 0!==arguments[3])||arguments[3],a=arguments.length>4&&void 0!==arguments[4]?arguments[4]:[];r(this,e);var s=i>>>3;this.header=new ArrayBuffer(44),this.view=new DataView(this.header),this.data=a,Object.defineProperty(this,"littleEndian",{configurable:!1,enumerable:!0,value:o,writable:!1}),this.pointer=0,this.ChunkID=o?"RIFF":"RIFX",this.ChunkSize=this.header.byteLength-8,this.Format="WAVE",this.SubChunk1ID="fmt ",this.SubChunk1Size=16,this.AudioFormat=1,this.NumChannels=t,this.SampleRate=n,this.ByteRate=t*n*s,this.BlockAlign=t*s,this.BitsPerSample=i,this.SubChunk2ID="data",this.SubChunk2Size=a.length*s}return i(e,null,[{key:"semitone",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"REST",e=/^([A-G])(\-?\d+)(b{0,2}|#{0,2})$/;if(!e.test(t))return-1/0;var r=t.match(e),i=n(r,4),o=i[1],a=i[2],s=i[3],u={C:0,D:2,E:4,F:5,G:7,A:9,B:11
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},h={"-1":0,0:1,1:2,2:3,3:4,4:5,5:6,6:7,7:8,8:9,9:10,10:11},f={bb:-2,b:-1,"":0,"#":1,"##":2};return void 0===u[o]||void 0===h[a]||void 0===f[s]?-1/0:u[o]+12*h[a]+f[s]}},{key:"note",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:-1/0,e=[-1,0,1,2,3,4,5,6,7,8,9,10],r=["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"],n=Math.floor(t/12),i=Math.floor(t-12*n),o=e[n],a=r[i];return void 0===o||void 0===a?"REST":a.charAt(0)+o.toString()+a.charAt(1)}},{key:"frequency",value:function(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:-1/0;return 440*Math.pow(2,(t-69)/12)}}]),i(e,[{key:"setString",value:function(t){for(var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:t.length,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:0,n=0;n<e;n++)this.view.setUint8(r+n,t.charCodeAt(n))}},{key:"getString",value:function(t){for(var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,r=0,n="";r<t;r++)n+=String.fromCharCode(this.view.getUint8(e+r));return n}},{key:"toBlob",value:function(){return new Blob([this.header,this.typedData],{type:"audio/wav"})}},{key:"toBuffer",value:function(){return t.concat([t.from(this.header),t.from(this.typedData)])}},{key:"tell",value:function(){return this.pointer/this.NumChannels/this.SampleRate}},{key:"seek",value:function(t){var e=!(arguments.length>1&&void 0!==arguments[1])||arguments[1],r=this.data,n=Math.round(this.SampleRate*t);if(this.pointer=this.NumChannels*n,e)for(;r.length<this.pointer;)r[r.length]=0;else this.pointer=r.length}},{key:"writeNote",value:function(t){var r,n,i,o,a=t.note,s=t.time,u=t.amplitude,h=void 0===u?1:u,f=arguments.length>1&&void 0!==arguments[1]?arguments[1]:[],l=!(arguments.length>2&&void 0!==arguments[2])||arguments[2],c=arguments.length>3&&void 0!==arguments[3]&&arguments[3],p=this.data,d=this.NumChannels,g=this.SampleRate,y=e.semitone(a),v=e.frequency(y)*Math.PI*2/g,b=(Math.PI,Math.round(g*s)),w=b-.001*g,m=b-w+1,k=this.pointer,E=p.length,S=Math.min(Math.floor((E-k)/d),b);if(0===f.length)for(f=[],r=0;r<d;r++)f[r]=r;var U=[];for(r=0;r<d;r++)U[r]=-1===f.indexOf(r);for(r=0;r<S;r++)for(n=0;n<f.length;n++)i=k+r*d+f[n],o=0,v>0&&(o=h*Math.sin(v*r)*(r<m?r:r>w?b-r+1:m)/m),p[i]=o+(l?p[i]:0);for(r=S;r<b;r++)for(i=k+r*d,n=0;n<d;n++)o=0,(v>0||!U[n])&&(o=h*Math.sin(v*r)*(r<m?r:r>w?b-r+1:m)/m),p[i+n]=o;var A=Math.max(k+b*d,E)*this.BitsPerSample>>>3;this.ChunkSize=A+this.header.byteLength-8,this.SubChunk2Size=A,c||(this.pointer=k+b*d)}},{key:"writeProgression",value:function(t){for(var e,r,n,i,o,a,s=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1,u=arguments.length>2&&void 0!==arguments[2]?arguments[2]:[],h=!(arguments.length>3&&void 0!==arguments[3])||arguments[3],f=arguments.length>4&&void 0!==arguments[4]&&arguments[4],l=arguments.length>5&&void 0!==arguments[5]?arguments[5]:1,c=this.pointer,p=0;p<t.length;p++){var d=t[p];e=d.note,r=d.time,n=d.amplitude,i=d.offset,void 0!==i&&this.seek(i),1===l||"REST"===e?this.writeNote({note:e,time:r,amplitude:void 0===n?s:n*s},u,h,!1):(o=r*l,a=r-o,this.writeNote({note:e,time:o,amplitude:void 0===n?s:n*s},u,h,!1),this.writeNote({note:"REST",time:a},u,h,!1))}f&&(this.pointer=c)}},{key:"ChunkID",set:function(t){this.setString(t,4,0)},get:function(){return this.getString(4,0)}},{key:"ChunkSize",set:function(t){this.view.setUint32(4,t,this.littleEndian)},get:function(){return this.view.getUint32(4,this.littleEndian)}},{key:"Format",set:function(t){this.setString(t,4,8)},get:function(){return this.getString(4,8)}},{key:"SubChunk1ID",set:function(t){this.setString(t,4,12)},get:function(){return this.getString(4,12)}},{key:"SubChunk1Size",set:function(t){this.view.setUint32(16,t,this.littleEndian)},get:function(){return this.view.getUint32(16,this.littleEndian)}},{key:"AudioFormat",set:function(t){this.view.setUint16(20,t,this.littleEndian)},get:function(){return this.view.getUint16(20,this.littleEndian)}},{key:"NumChannels",set:function(t){this.view.setUint16(22,t,this.littleEndian)},get:function(){return this.view.getUint16(22,this.littleEndian)}},{key:"SampleRate",set:function(t){this.view.setUint32(24,t,this.littleEndian)},get:function(){return this.view.getUint32(24,this.littleEndian)}},{key:"ByteRate",set:function(t){this.view.setUint32(28,t,this.littleEndian)},get:function(){return this.view.getUint32(28,this.littleEndian)}},{key:"BlockAlign",set:function(t){this.view.setUint16(32,t,this.littleEndian)},get:function(){return this.view.getUint16(32,this.littleEndian)}},{key:"BitsPerSample",set:function(t){this.view.setUint16(34,t,this.littleEndian)},get:function(){return this.view.getUint16(34,this.littleEndian)}},{key:"SubChunk2ID",set:function(t){this.setString(t,4,36)},get:function(){return this.getString(4,36)}},{key:"SubChunk2Size",set:function(t){this.view.setUint32(40,t,this.littleEndian)},get:function(){return this.view.getUint32(40,this.littleEndian)}},{key:"typedData",get:function(){var t,e,r=this.BitsPerSample>>>3,n=this.data,i=this.SubChunk2Size,o=i/r,a=new ArrayBuffer(i),s=new Uint8Array(a),u=Math.pow(2,(r<<3)-1)-1;switch(r){case 1:for(t=0;t<o;t++)s[t]=n[t]*u+128&255;break;case 2:if(this.littleEndian)for(t=0;t<o;t++)e=n[t]*u+65536&65535,s[2*t]=255&e,s[2*t+1]=e>>>8;else for(t=0;t<o;t++)e=n[t]*u+65536&65535,s[2*t]=e>>>8,s[2*t+1]=255&e;break;case 3:if(this.littleEndian)for(t=0;t<o;t++)e=n[t]*u+16777216&16777215,s[3*t]=255&e,s[3*t+1]=e>>>8&255,s[3*t+2]=e>>>16;else for(t=0;t<o;t++)e=n[t]*u+16777216&16777215,s[3*t]=e>>>16,s[3*t+1]=e>>>8&255,s[3*t+2]=255&e;case 4:if(this.littleEndian)for(t=0;t<o;t++)e=n[t]*u+4294967296&4294967295,s[4*t]=255&e,s[4*t+1]=e>>>8&255,s[4*t+2]=e>>>16&255,s[4*t+3]=e>>>24;else for(t=0;t<o;t++)e=n[t]*u+4294967296&4294967295,s[4*t]=e>>>24,s[4*t+1]=e>>>16&255,s[4*t+2]=e>>>8&255,s[4*t+3]=255&e}return a}}]),e}();e.exports=o}).call(this,t("buffer").Buffer)},{buffer:3}]},{},[1])(1)});
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