webaudio-tinysynth.min.js

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r=parseFloat(this.reverbLev);this.rev&&!isNaN(r)&&(this.rev.gain.value=8*r)},setLoop:f=>{this.loop=f},setVoices:v=>{this.voices=v},getPlayStatus:()=>({play:this.playing,maxTick:this.maxTick,curTick:this.playTick}),locateMIDI:tick=>{let i,p=this.playing;for(this.stopMIDI(),i=0;i<this.song.ev.length&&tick>this.song.ev[i].t;++i){var m=this.song.ev[i],ch=15&m.m[0];switch(240&m.m[0]){case 176:switch(m.m[1]){case 1:this.setModulation(ch,m.m[2]);break;case 7:this.setChVol(ch,m.m[2]);break;case 10:this.setPan(ch,m.m[2]);break;case 11:this.setExpression(ch,m.m[2]);break;case 64:this.setSustain(ch,m.m[2])}break;case 192:this.pg[15&m.m[0]]=m.m[1]}65361==m.m[0]&&(this.song.tempo=m.m[1])}this.song.ev[i]?(this.playIndex=i,this.playTick=this.song.ev[i].t):(this.playIndex=0,this.playTick=this.maxTick),p&&this.playMIDI()},getTimbreName:(m,n)=>0==m?this.program[n].name:this.drummap[n-35].name,loadMIDIfromSrc:()=>{this.loadMIDIUrl(this.src)},loadMIDIUrl:url=>{if(url){var xhr=new XMLHttpRequest;xhr.open("GET",url,!0),xhr.responseType="arraybuffer",xhr.loadMIDI=this.loadMIDI.bind(this),xhr.onload=function(e){200==this.status&&this.loadMIDI(this.response)},xhr.send()}},reset:()=>{for(let i=0;i<16;++i)this.setProgram(i,0),this.setBendRange(i,256),this.setModulation(i,0),this.setChVol(i,100),this.setPan(i,64),this.resetAllControllers(i),this.allSoundOff(i),this.rhythm[i]=0,this.tuningC[i]=0,this.tuningF[i]=0;this.masterTuningC=0,this.masterTuningF=0,this.rhythm[9]=1},stopMIDI:()=>{this.playing=0;for(var i=0;i<16;++i)this.allSoundOff(i)},playMIDI:()=>{if(!this.song)return;const dummy=this.actx.createOscillator();dummy.connect(this.actx.destination),dummy.frequency.value=0,dummy.start(0),dummy.stop(this.actx.currentTime+.001),this.playTick>=this.maxTick&&(this.playTick=0,this.playIndex=0),this.playTime=this.actx.currentTime+.1,this.tick2Time=240/this.song.tempo/this.song.timebase,this.playing=1},loadMIDI:data=>{function Get2(s,i){return(s[i]<<8)+s[i+1]}function Get4(s,i){return(s[i]<<24)+(s[i+1]<<16)+(s[i+2]<<8)+s[i+3]}function GetStr(s,i,len){return String.fromCharCode.apply(null,s.slice(i,i+len))}function Delta(s,i){var v,d;for(v=0,datalen=1;128&(d=s[i]);)v=(v<<7)+(127&d),++datalen,++i;return(v<<7)+d}function Msg(song,tick,s,i){var v=s[i];switch(datalen=1,0==(128&v)&&(v=runst,datalen=0),runst=v,240&v){case 192:case 208:song.ev.push({t:tick,m:[v,s[i+datalen]]}),datalen+=1;break;case 240:switch(v){case 240:case 247:var len=Delta(s,i+1);datastart=1+datalen;var exd=Array.from(s.slice(i+datastart,i+datastart+len));exd.unshift(240),song.ev.push({t:tick,m:exd}),datalen+=len+1;break;case 255:len=Delta(s,i+2);switch(datastart=2+datalen,datalen=len+datalen+2,s[i+1]){case 2:song.copyright+=GetStr(s,i+datastart,datalen-3);break;case 1:case 3:case 4:case 9:song.text=GetStr(s,i+datastart,datalen-datastart);break;case 47:return 1;case 81:var val=Math.floor(6e7/function(s,i){return(s[i]<<16)+(s[i+1]<<8)+s[i+2]}(s,i+3));song.ev.push({t:tick,m:[65361,val]})}}break;default:song.ev.push({t:tick,m:[v,s[i+datalen],s[i+datalen+1]]}),datalen+=2}return 0}this.stopMIDI();var s=new Uint8Array(data),datalen=0,datastart=0,runst=144,idx=0,hd=s.slice(0,4);if("77,84,104,100"==hd.toString()){var len=Get4(s,4),numtrk=(Get2(s,8),Get2(s,10));this.maxTick=0;var tb=4*Get2(s,12);idx=len+8,this.song={copyright:"",text:"",tempo:120,timebase:tb,ev:[]};for(let tr=0;tr<numtrk;++tr){if(hd=s.slice(idx,idx+4),len=Get4(s,idx+4),"77,84,114,107"==hd.toString()){var tick=0,j=0;for(this.notetab.length=0;;){tick+=Delta(s,idx+8+j),j+=datalen;var e=Msg(this.song,tick,s,idx+8+j);if(j+=datalen,e)break}tick>this.maxTick&&(this.maxTick=tick)}idx+=len+8}this.song.ev.sort((function(x,y){return x.t-y.t})),this.reset(),this.locateMIDI(0)}},setQuality:q=>{null!=q&&(this.quality=q);for(let i=0;i<128;++i)this.setTimbre(0,i,this.program0[i]);for(let i=0;i<this.drummap0.length;++i)this.setTimbre(1,i+35,this.drummap0[i]);if(this.quality){for(let i=0;i<this.program1.length;++i)this.setTimbre(0,i,this.program1[i]);for(let i=0;i<this.drummap.length;++i)this.drummap1[i]&&this.setTimbre(1,i+35,this.drummap1[i])}},setTimbre:(m,n,p)=>{const defp={g:0,w:"sine",t:1,f:0,v:.5,a:0,h:.01,d:.01,s:0,r:.05,p:1,q:1,k:0};function filldef(p){for(n=0;n<p.length;++n)for(let k in defp)p[n].hasOwnProperty(k)&&void 0!==p[n][k]||(p[n][k]=defp[k]);return p}m&&n>=35&&n<=81&&(this.drummap[n-35].p=filldef(p)),0==m&&n>=0&&n<=127&&(this.program[n].p=filldef(p))},_pruneNote:nt=>{for(let k=nt.o.length-1;k>=0;--k){if(nt.o[k].frequency?nt.o[k].frequency.cancelScheduledValues(0):nt.o[k].playbackRate.cancelScheduledValues(0),nt.g[k].gain.cancelScheduledValues(0),nt.o[k].stop(),nt.o[k].detune)try{this.chmod[nt.ch].disconnect(nt.o[k].detune)}catch(e){}nt.g[k].gain.value=0}},_limitVoices:(ch,n)=>{this.notetab.sort((function(n1,n2){return n1.f!=n2.f?n1.f-n2.f:n1.e!=n2.e?n2.e-n1.e:n2.t-n1.t}));for(let i=this.notetab.length-1;i>=0;--i){var nt=this.notetab[i];(this.actx.currentTime>nt.e||i>=this.voices-1)&&(this._pruneNote(nt),this.notetab.splice(i,1))}},_note:(t,ch,n,v,p)=>{let out,sc,pn;const o=[],g=[],vp=[],fp=[],r=[],f=440*Math.pow(2,(n-69+this.masterTuningC+this.tuningC[ch]+(this.masterTuningF+this.tuningF[ch]/8192+this.scaleTuning[ch][n%12]))/12);this._limitVoices(ch,n);for(let i=0;i<p.length;++i){pn=p[i];const dt=t+pn.a+pn.h;if(0==pn.g?(out=this.chvol[ch],sc=v*v/16384,fp[i]=f*pn.t+pn.f):pn.g>10?(out=g[pn.g-11].gain,sc=1,fp[i]=fp[pn.g-11]*pn.t+pn.f):o[pn.g-1].frequency?(out=o[pn.g-1].frequency,sc=fp[pn.g-1],fp[i]=fp[pn.g-1]*pn.t+pn.f):(out=o[pn.g-1].playbackRate,sc=fp[pn.g-1]/440,fp[i]=fp[pn.g-1]*pn.t+pn.f),"n"===pn.w[0])o[i]=this.actx.createBufferSource(),o[i].buffer=this.noiseBuf[pn.w],o[i].loop=!0,o[i].playbackRate.value=fp[i]/440,1!=pn.p&&this._setParamTarget(o[i].playbackRate,fp[i]/440*pn.p,t,pn.q),o[i].detune&&(this.chmod[ch].connect(o[i].detune),o[i].detune.value=this.bend[ch]);else o[i]=this.actx.createOscillator(),o[i].frequency.value=fp[i],1!=pn.p&&this._setParamTarget(o[i].frequency,fp[i]*pn.p,t,pn.q),"w"==pn.w[0]?o[i].setPeriodicWave(this.wave[pn.w]):o[i].type=pn.w,o[i].detune&&(this.chmod[ch].connect(o[i].detune),o[i].detune.value=this.bend[ch]);g[i]=this.actx.createGain(),r[i]=pn.r,o[i].connect(g[i]),g[i].connect(out),vp[i]=sc*pn.v,pn.k&&(vp[i]*=Math.pow(2,(n-60)/12*pn.k)),pn.a?(g[i].gain.value=0,g[i].gain.setValueAtTime(0,t),g[i].gain.linearRampToValueAtTime(vp[i],t+pn.a)):g[i].gain.setValueAtTime(vp[i],t),this._setParamTarget(g[i].gain,pn.s*vp[i],dt,pn.d),o[i].start(t),this.rhythm[ch]&&(o[i].onended=()=>{try{o[i].detune&&this.chmod[ch].disconnect(o[i].detune)}catch(e){}},o[i].stop(t+p[0].d*this.releaseRatio))}this.rhythm[ch]||this.notetab.push({t:t,e:99999,ch:ch,n:n,o:o,g:g,t2:t+pn.a,v:vp,r:r,f:0})},_setParamTarget:(p,v,t,d)=>{0!=d?p.setTargetAtTime(v,t,d):p.setValueAtTime(v,t)},_releaseNote:(nt,t)=>{if(9!=nt.ch)for(let k=nt.g.length-1;k>=0;--k)nt.g[k].gain.cancelScheduledValues(t),t==nt.t2?nt.g[k].gain.setValueAtTime(nt.v[k],t):t<nt.t2&&nt.g[k].gain.setValueAtTime(nt.v[k]*(t-nt.t)/(nt.t2-nt.t),t),this._setParamTarget(nt.g[k].gain,0,t,nt.r[k]);nt.e=t+nt.r[0]*this.releaseRatio,nt.f=1},setModulation:(ch,v,t)=>{this.chmod[ch].gain.setValueAtTime(100*v/127,this._tsConv(t))},setChVol:(ch,v,t)=>{this.vol[ch]=3*v*v/16129,this.chvol[ch].gain.setValueAtTime(this.vol[ch]*this.ex[ch],this._tsConv(t))},setPan:(ch,v,t)=>{this.chpan[ch]&&this.chpan[ch].pan.setValueAtTime((v-64)/64,this._tsConv(t))},setExpression:(ch,v,t)=>{this.ex[ch]=v*v/16129,this.chvol[ch].gain.setValueAtTime(this.vol[ch]*this.ex[ch],this._tsConv(t))},setSustain:(ch,v,t)=>{if(this.sustain[ch]=v,t=this._tsConv(t),v<64)for(let i=this.notetab.length-1;i>=0;--i){const nt=this.notetab[i];t>=nt.t&&nt.ch==ch&&1==nt.f&&this._releaseNote(nt,t)}},allSoundOff:ch=>{for(let i=this.notetab.length-1;i>=0;--i){const nt=this.notetab[i];nt.ch==ch&&(this._pruneNote(nt),this.notetab.splice(i,1))}},resetAllControllers:ch=>{this.bend[ch]=0,this.ex[ch]=1,this.rpnidx[ch]=16383,this.sustain[ch]=0,this.chvol[ch]&&(this.chvol[ch].gain.value=this.vol[ch]*this.ex[ch],this.chmod[ch].gain.value=0)},setBendRange:(ch,v)=>{this.brange[ch]=v},setProgram:(ch,v)=>{this.debug&&console.log("Pg("+ch+")="+v),this.pg[ch]=v},_tsConv:t=>(null==t||t<=0?(t=0,this.actx&&(t=this.actx.currentTime)):this.tsmode&&(t=.001*t-this.tsdiff),t),setBend:(ch,v,t)=>{t=this._tsConv(t);const br=100*this.brange[ch]/127;this.bend[ch]=(v-8192)*br/8192;for(let i=this.notetab.length-1;i>=0;--i){const nt=this.notetab[i];if(nt.ch==ch)for(let k=nt.o.length-1;k>=0;--k)nt.o[k].frequency&&nt.o[k].detune&&nt.o[k].detune.setValueAtTime(this.bend[ch],t)}},noteOff:(ch,n,t)=>{if(!this.rhythm[ch]){t=this._tsConv(t);for(let i=this.notetab.length-1;i>=0;--i){const nt=this.notetab[i];t>=nt.t&&nt.ch==ch&&nt.n==n&&0==nt.f&&(nt.f=1,this.sustain[ch]<64&&this._releaseNote(nt,t))}}},noteOn:(ch,n,v,t)=>{0!=v?(t=this._tsConv(t),this.rhythm[ch]?n>=35&&n<=81&&this._note(t,ch,n,v,this.drummap[n-35].p):this._note(t,ch,n,v,this.program[this.pg[ch]].p)):this.noteOff(ch,n,t)},setTsMode:tsmode=>{this.tsmode=tsmode},send:(msg,t)=>{const ch=15&msg[0],cmd=-16&msg[0];if(!(cmd<128||cmd>=256))switch("suspended"==this.audioContext.state&&this.audioContext.resume(),cmd){case 176:switch(msg[1]){case 1:this.setModulation(ch,msg[2],t);break;case 7:this.setChVol(ch,msg[2],t);break;case 10:this.setPan(ch,msg[2],t);break;case 11:this.setExpression(ch,msg[2],t);break;case 64:this.setSustain(ch,msg[2],t);break;case 98:case 99:this.rpnidx[ch]=16383;break;case 100:this.rpnidx[ch]=16256&this.rpnidx[ch]|msg[2];break;case 101:this.rpnidx[ch]=127&this.rpnidx[ch]|msg[2]<<7;break;case 6:switch(this.rpnidx[ch]){case 0:this.brange[ch]=(msg[2]<<7)+(127&this.brange[ch]);break;case 1:this.tuningF[ch]=(msg[2]<<7)+(this.tuningF[ch]+8192&127)-8192;break;case 2:this.tuningC[ch]=msg[2]-64}break;case 38:switch(this.rpnidx[ch]){case 0:this.brange[ch]=16256&this.brange[ch]|msg[2];break;case 1:this.tuningF[ch]=(this.tuningF[ch]+8192&16256|msg[2])-8192}break;case 120:case 123:case 124:case 125:case 126:case 127:this.allSoundOff(ch);break;case 121:this.resetAllControllers(ch)}break;case 192:this.setProgram(ch,msg[1]);break;case 224:this.setBend(ch,msg[1]+(msg[2]<<7),t);break;case 144:this.noteOn(ch,msg[1],msg[2],t);break;case 128:this.noteOff(ch,msg[1],t);break;case 240:if(255==msg[0]){this.reset();break}if(254!=msg[0]&&this.debug){var ds=[];for(let ii=0;ii<msg.length;++ii)ds.push(msg[ii].toString(16))}if(240==msg[0]&&(127==msg[1]&&4==msg[3]&&(3==msg[4]&&msg.length>=8&&(this.masterTuningF=(128*msg[6]+msg[5]-8192)/8192),4==msg[4]&&msg.length>=8&&(this.masterTuningC=msg[6]-64)),65==msg[1]&&66==msg[3]&&18==msg[4]&&64==msg[5]))if(16==(240&msg[6])&&11==msg.length){const c=[9,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15][15&msg[6]];21==msg[7]?this.rhythm[c]=msg[8]:msg[7]>=64&&msg[7]<=75&&(this.scaleTuning[c][msg[7]-64]=(msg[8]-64)/100)}else 0==msg[6]&&(0==msg[7]&&14==msg.length?this.masterTuningF=(4096*msg[8]+256*msg[9]+16*msg[10]+msg[11]-1024)/1e3:5==msg[7]&&11==msg.length&&(this.masterTuningC=msg[8]-64))}},_createWave:w=>{const imag=new Float32Array(w.length),real=new Float32Array(w.length);for(let i=1;i<w.length;++i)imag[i]=w[i];return this.actx.createPeriodicWave(real,imag)},getAudioContext:()=>this.actx,setAudioContext:(actx,dest)=>{this.audioContext=this.actx=actx,this.dest=dest,dest||(this.dest=actx.destination),this.tsdiff=.001*performance.now()-this.actx.currentTime,this.debug&&console.log("TSDiff:"+this.tsdiff),this.out=this.actx.createGain(),this.comp=this.actx.createDynamicsCompressor();var blen=.5*this.actx.sampleRate|0;this.convBuf=this.actx.createBuffer(2,blen,this.actx.sampleRate),this.noiseBuf={},this.noiseBuf.n0=this.actx.createBuffer(1,blen,this.actx.sampleRate),this.noiseBuf.n1=this.actx.createBuffer(1,blen,this.actx.sampleRate);var d1=this.convBuf.getChannelData(0),d2=this.convBuf.getChannelData(1),dn=this.noiseBuf.n0.getChannelData(0),dr=this.noiseBuf.n1.getChannelData(0);for(let i=0;i<blen;++i)i/blen<Math.random()&&(d1[i]=Math.exp(-3*i/blen)*(Math.random()-.5)*.5,d2[i]=Math.exp(-3*i/blen)*(Math.random()-.5)*.5),dn[i]=2*Math.random()-1;for(let jj=0;jj<64;++jj){const r1=10*Math.random()+1,r2=10*Math.random()+1;for(let i=0;i<blen;++i){var dd=Math.sin(i/blen*2*Math.PI*440*r1)*Math.sin(i/blen*2*Math.PI*440*r2);dr[i]+=dd/8}}this.useReverb&&(this.conv=this.actx.createConvolver(),this.conv.buffer=this.convBuf,this.rev=this.actx.createGain(),this.rev.gain.value=this.reverbLev,this.out.connect(this.conv),this.conv.connect(this.rev),this.rev.connect(this.comp)),this.setMasterVol(),this.out.connect(this.comp),this.comp.connect(this.dest),this.chvol=[],this.chmod=[],this.chpan=[],this.wave={w9999:this._createWave("w9999")},this.lfo=this.actx.createOscillator(),this.lfo.frequency.value=5,this.lfo.start(0);for(let i=0;i<16;++i)this.chvol[i]=this.actx.createGain(),this.actx.createStereoPanner?(this.chpan[i]=this.actx.createStereoPanner(),this.chvol[i].connect(this.chpan[i]),this.chpan[i].connect(this.out)):(this.chpan[i]=null,this.chvol[i].connect(this.out)),this.chmod[i]=this.actx.createGain(),this.lfo.connect(this.chmod[i]),this.pg[i]=0,this.resetAllControllers(i);this.setReverbLev(),this.reset(),this.send([144,60,1]),this.send([144,60,0])}})}if(window&&window.customElements){class WebAudioTinySynthElement extends HTMLElement{constructor(){super()}connectedCallback(){const div=document.createElement("div");div.innerHTML="<canvas\n    id='wa-canvas' width='300' height='32'\n    touch-action='none' tabindex='0'\n    style='\n      position:relative;\n      margin:0;\n      border:none;\n      width:300px;\n      height:32px;\n    '\n  ></canvas>\n  <div id='wa-logo'\n    style='\n      display:none;\n      position:absolute;\n      top:5px;\n      left:5px;\n      color:#fff;\n      font-size:8px;\n      background:rgba(0,0,0,0.5);\n    '\n  >TinySynth</div>",this.getAttr=(n,def)=>{let v=this.getAttribute(n);return""==v||null==v?def:"number"==typeof def?"true"==v?1:(v=+v,isNaN(v)?0:v):v},this.canvas=div.children[0],this.appendChild(div),WebAudioTinySynthCore.bind(this)(this);const plist=this.properties;for(let k in plist){const v=plist[k];v.observer?(this["_"+k]=v.value,Object.defineProperty(this,k,{get:()=>this["_"+k],set:val=>{this["_"+k]=val,this[v.observer]()}})):this[k]=v}for(let k in plist){const v=plist[k];this[k]=this.getAttr(k,v.value)}this.setQuality(1),this.init(),this._guiInit.bind(this)(),setInterval(this._guiUpdate.bind(this),100)}}window.customElements.define("webaudio-tinysynth",WebAudioTinySynthElement)}class WebAudioTinySynth{constructor(opt){WebAudioTinySynthCore.bind(this)(this);for(let k in this.properties)this[k]=this.properties[k].value;this.setQuality(1),opt&&(null!=opt.useReverb&&(this.useReverb=opt.useReverb),null!=opt.quality&&this.setQuality(opt.quality),null!=opt.voices&&this.setVoices(opt.voices)),this.init()}}"object"==typeof exports&&"undefined"!=typeof module?module.exports=WebAudioTinySynth:"function"==typeof define&&define.amd?define((function(){return WebAudioTinySynth})):window.WebAudioTinySynth=WebAudioTinySynth}(this);