pcmdata.min.js

(function(b,c){var j=String.fromCharCode,h=true,d=false;function e(k,l){return l?j(k&255)+e(k>>8,l-1):""}function g(k,l){return l?g(k>>8,l-1)+j(255-k&255):""}function i(k,l,m){return m?g(k,l):e(k,l)}function a(r,q){var k=r.length,p=k-1,s=0,o=c.pow,m;if(q){for(m=0;m<k;m++){s+=(255-r.charCodeAt(m))*o(256,p-m)}}else{for(m=0;m<k;m++){s+=r.charCodeAt(m)*o(256,m)}}return s}function f(n,t,o,w){var s=c.pow,r=c.floor,l=f.convertFromBinary,u=f.convertToBinary,k=n/8,q=s(2,n),v=q/2,x=v-1,p=1/v,m=1/x;return w?o?t?function(y,z){y=r(y<0?y*v+q:y*x);return u(y,k,z)}:function(y,z){return u(r(y*x),k,z)}:t?function(y,z){return u(y<0?y+q:y,k,z)}:function(y,z){return u(y,k,z)}:o?t?function(A,z){var y=l(A,z);return y>x?(y-q)*p:y*m}:function(z,y){return l(z,y)*m}:t?function(A,z){var y=l(A,z);return y>x?y-q:y}:function(z,y){return l(z,y)}}f.convertToBinary=i;f.convertFromBinary=a;f.fromQ32=f(32,h,h,h);f.toQ32=f(32,h,h,d);f.fromQ24=f(24,h,h,h);f.toQ24=f(24,h,h,d);f.fromQ16=f(16,h,h,h);f.toQ16=f(16,h,h,d);f.fromQ8=f(8,h,h,h);f.toQ8=f(8,h,h,d);f.fromInt32=f(32,h,d,h);f.toInt32=f(32,h,d,d);f.fromInt16=f(16,h,d,h);f.toInt16=f(16,h,d,d);f.fromInt8=f(8,h,d,h);f.toInt8=f(8,h,d,d);f.fromUint32=f(32,d,d,h);f.toUint32=f(32,d,d,d);f.fromUint16=f(16,d,d,h);f.toUint16=f(16,d,d,d);f.fromUint8=f(8,d,d,h);f.toUint8=f(8,d,d,d);b.Binary=f}(this,Math));(function(e,f){function g(h){this.data=h}var d=g.prototype={read:function(i){var h=this,j=h.data.substr(0,i);h.skip(i);return j},skip:function(i){var h=this,j=h.data=h.data.substr(i);h.pointer+=i;return j.length},readBuffer:function(j,n,p){var k=this,o="read"+p+n,q=n/8,h=j.length,m=0;while(k.data&&m<h){j[m++]=k[o]()}return m}},c,b;function a(k,i,j){var h=i/8;d["read"+k+i]=function(l){return j(this.read(h),l)}}for(c in f){b=/to([a-z]+)([0-9]+)/i.exec(c);b&&a(b[1],b[2],f[c])}e.Stream=g;g.newType=a}(this,this.Binary));this.PCMData=(function(a,b){function c(d){return(typeof d==="string"?c.decode:c.encode)(d)}c.decodeFrame=function(g,f,d){if(f===8){var e=new (window.Uint8Array||Array)(d.length);(new b(g)).readBuffer(e,8,"Uint");for(f=0;f<d.length;f++){d[f]=(e[f]-127.5)*127.5}}else{(new b(g)).readBuffer(d,f,"Q")}return d};c.encodeFrame=function(j,g){var e=a[(g===8?"fromUint":"fromQ")+g],d=j.length,h="",f;if(g===8){for(f=0;f<d;f++){h+=e(j[f]*127.5+127.5)}}else{for(f=0;f<d;f++){h+=e(j[f])}}return h};c.decode=function(D,C){var g=new b(D),n=g.read(4),v=g.readUint32();g=new b(g.read(v));var k=g.read(4),m=g.read(4),t=g.readUint32(),d=new b(g.read(t)),f=d.readUint16(),y=d.readUint16(),B=d.readUint32(),h=d.readUint32(),A=d.readUint16(),z=A/y,l=d.readUint16(),e,p,r,w,u,j,x,s={},o={channelCount:y,bytesPerSample:A/y,sampleRate:h/A,chunks:s,data:u};function q(){e=g.read(4);p=g.readUint32();w=g.read(p);j=s[e]=s[e]||[];if(e==="data"){r=~~(p/z);u=o.data=new (typeof Float32Array!=="undefined"?Float32Array:Array)(r);c.decodeFrame(w,z*8,u)}else{j.push(w)}C&&(g.data?setTimeout(q,1):C(o))}if(C){g.data?q():C(o)}else{while(g.data){q()}}return o};c.encode=function(x,v){var r=a.fromUint32,y=a.fromUint16,o=x.data,d=x.sampleRate,h=x.channelCount||1,t=x.bytesPerSample||1,j=t*8,f=h*t,u=d*f,g=o.length,e=g*t,m=Math.pow(2,j-1)-1,l=[],k="",w,s,p,q;l.push("fmt "+r(16)+y(1)+y(h)+r(d)+r(u)+y(f)+y(j));l.push("data"+r(e)+c.encodeFrame(o,j));q=x.chunks;if(q){for(s in q){if(q.hasOwnProperty(s)){w=q[s];for(p=0;p<w.length;p++){k=w[p];l.push(s+r(k.length)+k)}}}}l=l.join("");l="RIFF"+r(l.length)+"WAVE"+l;v&&setTimeout(function(){v(l)},1);return l};return c}(this.Binary,this.Stream));