2 lines
27 KiB
JavaScript
2 lines
27 KiB
JavaScript
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var CodecParser=function(e){"use strict";const t=Symbol,s=(()=>{const e="left",t="center",s="right";return["","front ","side ","rear "].map((i=>[[e,s],[e,s,t],[e,t,s],[t,e,s],[t]].flatMap((e=>e.map((e=>i+e)).join(", ")))))})(),i="LFE",r="monophonic (mono)",n="stereo",a="surround",o=(e,...t)=>`${[r,n,`linear ${a}`,"quadraphonic",`5.0 ${a}`,`5.1 ${a}`,`6.1 ${a}`,`7.1 ${a}`][e-1]} (${t.join(", ")})`,h=[r,o(2,s[0][0]),o(3,s[0][2]),o(4,s[1][0],s[3][0]),o(5,s[1][2],s[3][0]),o(6,s[1][2],s[3][0],i),o(7,s[1][2],s[2][0],s[3][4],i),o(8,s[1][2],s[2][0],s[3][0],i)],c=48e3,l=44100,u=32e3,d=24e3,p=22050,_=16e3,m=8e3,g="absoluteGranulePosition",f="bandwidth",b="bitDepth",C="bitrate",y=C+"Maximum",S=C+"Minimum",w=C+"Nominal",P="buffer",k=P+"Fullness",v="codec",F=v+"Frames",x="coupledStreamCount",H="crc",I=H+"16",M=H+"32",U="data",O="description",N="duration",$="emphasis",A="hasOpusPadding",R="header",B="isContinuedPacket",L="isCopyrighted",D="isFirstPage",T="isHome",E="isLastPage",G="isOriginal",z="isPrivate",q="isVbr",V="layer",j="length",W="mode",J=W+"Extension",K="mpeg",Q=K+"Version",X="numberAACFrames",Y="outputGain",Z="preSkip",ee="profile",te=t(),se="protection",ie="rawData",re="segments",ne="subarray",ae="version",oe="vorbis",he=oe+"Comments",ce=oe+"Setup",le="block",ue=le+"ingStrategy",de=t(),pe=le+"Size",_e=le+"size0",me=le+"size1",ge=t(),fe="channel",be=fe+"MappingFamily",Ce=fe+"MappingTable",ye=fe+"Mode",Se=t(),we=fe+"s",Pe="copyright",ke=Pe+"Id",ve=Pe+"IdStart",Fe="frame",xe=Fe+"Count",He=Fe+"Length",Ie="Number",Me=Fe+Ie,Ue=Fe+"Padding",Oe=Fe+"Size",Ne="Rate",$e="inputSample"+Ne,Ae="page",Re=Ae+"Checksum",Be=t(),Le=Ae+"SegmentTable",De=Ae+"Sequence"+Ie,Te="sample",Ee=Te+Ie,Ge=Te+Ne,ze=t(),qe=Te+"s",Ve="stream",je=Ve+"Count",We=Ve+"Info",Je=Ve+"Serial"+Ie,Ke=Ve+"StructureVersion",Qe="total",Xe=Qe+"BytesOut",Ye=Qe+"Duration",Ze=Qe+"Samples",et=t(),tt=t(),st=t(),it=t(),rt=t(),nt=t(),at=t(),ot=t(),ht=t(),ct=t(),lt=t(),ut=t(),dt=t(),pt=t(),_t=t(),mt=t(),gt=t(),ft=t(),bt=Uint8Array,Ct=DataView,yt="reserved",St="bad",wt="free",Pt="none",kt="16bit CRC",vt=(e,t,s)=>{for(let i=0;i<e[j];i++){let r=t(i);for(let e=8;e>0;e--)r=s(r);e[i]=r}return e},Ft=vt(new bt(256),(e=>e),(e=>128&e?7^e<<1:e<<1)),xt=[vt(new Uint16Array(256),(e=>e<<8),(e=>e<<1^(32768&e?32773:0)))],Ht=[vt(new Uint32Array(256),(e=>e),(e=>e>>>1^3988292384*(1&e)))];for(let e=0;e<15;e++){xt.push(new Uint16Array(256)),Ht.push(new Uint32Array(256));for(let t=0;t<=255;t++)xt[e+1][t]=xt[0][xt[e][t]>>>8]^xt[e][t]<<8,Ht[e+1][t]=Ht[e][t]>>>8^Ht[0][255&Ht[e][t]]}const It=e=>{const t=e[j],s=t-16;let i=0,r=0;for(;r<=s;)i=Ht[15][255&(e[r++]^i)]^Ht[14][255&(e[r++]^i>>>8)]^Ht[13][255&(e[r++]^i>>>16)]^Ht[12][e[r++]^i>>>24]^Ht[11][e[r++]]^Ht[10][e[r++]]^Ht[9][e[r++]]^Ht[8][e[r++]]^Ht[7][e[r++]]^Ht[6][e[r++]]^Ht[5][e[r++]]^Ht[4][e[r++]]^Ht[3][e[r++]]^Ht[2][e[r++]]^Ht[1][e[r++]]^Ht[0][e[r++]];for(;r!==t;)i=Ht[0][255&(i^e[r++])]^i>>>8;return~i},Mt=(...e)=>{const t=new bt(e.reduce(((e,t)=>e+t[j]),0));return e.reduce(((e,s)=>(t.set(s,e),e+s[j])),0),t},Ut=e=>String.fromCharCode(...e),Ot=[0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15],Nt=e=>Ot[15&e]<<4|Ot[e>>4];class $t{constructor(e){this._data=e,this._pos=8*e[j]}set position(e){this._pos=e}get position(){return this._pos}read(e){const t=Math.floor(this._pos/8),s=this._pos%8;this._pos-=e;return(Nt(this._data[t-1])<<8)+Nt(this._data[t])>>7-s&255}}class At{constructor(e,t){this._onCodecHeader=e,this._onCodecUpdate=t,this[_t]()}[mt](){this._isEnabled=!0}[_t](){this._headerCache=new Map,this._codecUpdateData=new WeakMap,this._codecHeaderSent=!1,this._codecShouldUpdate=!1,this._bitrate=null,this._isEnabled=!1}[pt](e,t){if(this._onCodecUpdate){this._bitrate!==e&&(this._bitrate=e,this._codecShouldUpdate=!0);const s=this._codecUpdateData.get(this._headerCache.get(this._currentHeader));this._codecShouldUpdate&&s&&this._onCodecUpdate({bitrate:e,...s},t),this._codecShouldUpdate=!1}}[ht](e){const t=this._headerCache.get(e);return t&&this._updateCurrentHeader(e),t}[ct](e,t,s){this._isEnabled&&(this._codecHeaderSent||(this._onCodecHeader({...t}),this._codecHeaderSent=!0
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