2 lines
27 KiB
JavaScript
2 lines
27 KiB
JavaScript
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),this._updateCurrentHeader(e),this._headerCache.set(e,t),this._codecUpdateData.set(t,s))}_updateCurrentHeader(e){this._onCodecUpdate&&e!==this._currentHeader&&(this._codecShouldUpdate=!0,this._currentHeader=e)}}const Rt=new WeakMap,Bt=new WeakMap;class Lt{constructor(e,t){this._codecParser=e,this._headerCache=t}*[at](){let e;for(;;){if(e=yield*this.Frame[lt](this._codecParser,this._headerCache,0),e)return e;this._codecParser[tt](1)}}*[ot](e){let t=yield*this[at]();const s=Bt.get(t)[j];if(e||this._codecParser._flushing||(yield*this.Header[ht](this._codecParser,this._headerCache,s)))return this._headerCache[mt](),this._codecParser[tt](s),this._codecParser[it](t),t;this._codecParser[rt](`Missing ${Fe} at ${s} bytes from current position.`,`Dropping current ${Fe} and trying again.`),this._headerCache[_t](),this._codecParser[tt](1)}}class Dt{constructor(e,t){Bt.set(this,{[R]:e}),this[U]=t}}class Tt extends Dt{static*[lt](e,t,s,i,r){const n=yield*e[ht](s,i,r);if(n){const e=Rt.get(n)[He],i=Rt.get(n)[qe];return new t(n,(yield*s[et](e,r))[ne](0,e),i)}return null}constructor(e,t,s){super(e,t),this[R]=e,this[qe]=s,this[N]=s/e[Ge]*1e3,this[Me]=null,this[Xe]=null,this[Ze]=null,this[Ye]=null,Bt.get(this)[j]=t[j]}}const Et="unsynchronizationFlag",Gt="extendedHeaderFlag",zt="experimentalFlag",qt="footerPresent";class Vt{static*getID3v2Header(e,t,s){const i={};let r=yield*e[et](3,s);if(73!==r[0]||68!==r[1]||51!==r[2])return null;if(r=yield*e[et](10,s),i[ae]=`id3v2.${r[3]}.${r[4]}`,15&r[5])return null;if(i[Et]=!!(128&r[5]),i[Gt]=!!(64&r[5]),i[zt]=!!(32&r[5]),i[qt]=!!(16&r[5]),128&r[6]||128&r[7]||128&r[8]||128&r[9])return null;const n=r[6]<<21|r[7]<<14|r[8]<<7|r[9];return i[j]=10+n,new Vt(i)}constructor(e){this[ae]=e[ae],this[Et]=e[Et],this[Gt]=e[Gt],this[zt]=e[zt],this[qt]=e[qt],this[j]=e[j]}}class jt{constructor(e){Rt.set(this,e),this[b]=e[b],this[C]=null,this[we]=e[we],this[ye]=e[ye],this[Ge]=e[Ge]}}const Wt={0:[wt,wt,wt,wt,wt],16:[32,32,32,32,8],240:[St,St,St,St,St]},Jt=(e,t,s)=>8*((e+s)%t+t)*(1<<(e+s)/t)-8*t*(t/8|0);for(let e=2;e<15;e++)Wt[e<<4]=[32*e,Jt(e,4,0),Jt(e,4,-1),Jt(e,8,4),Jt(e,8,0)];const Kt="bands ",Qt=" to 31",Xt={0:Kt+4+Qt,16:Kt+8+Qt,32:Kt+12+Qt,48:Kt+16+Qt},Yt="bitrateIndex",Zt="v2",es="v1",ts="Intensity stereo ",ss=", MS stereo ",is="on",rs="off",ns={0:ts+rs+ss+rs,16:ts+is+ss+rs,32:ts+rs+ss+is,48:ts+is+ss+is},as={0:{[O]:yt},2:{[O]:"Layer III",[Ue]:1,[J]:ns,[es]:{[Yt]:2,[qe]:1152},[Zt]:{[Yt]:4,[qe]:576}},4:{[O]:"Layer II",[Ue]:1,[J]:Xt,[qe]:1152,[es]:{[Yt]:1},[Zt]:{[Yt]:4}},6:{[O]:"Layer I",[Ue]:4,[J]:Xt,[qe]:384,[es]:{[Yt]:0},[Zt]:{[Yt]:3}}},os="MPEG Version ",hs="ISO/IEC ",cs={0:{[O]:`${os}2.5 (later extension of MPEG 2)`,[V]:Zt,[Ge]:{0:11025,4:12e3,8:m,12:yt}},8:{[O]:yt},16:{[O]:`${os}2 (${hs}13818-3)`,[V]:Zt,[Ge]:{0:p,4:d,8:_,12:yt}},24:{[O]:`${os}1 (${hs}11172-3)`,[V]:es,[Ge]:{0:l,4:c,8:u,12:yt}},length:j},ls={0:kt,1:Pt},us={0:Pt,1:"50/15 ms",2:yt,3:"CCIT J.17"},ds={0:{[we]:2,[O]:n},64:{[we]:2,[O]:"joint "+n},128:{[we]:2,[O]:"dual channel"},192:{[we]:1,[O]:r}};class ps extends jt{static*[ht](e,t,s){const i={},r=yield*Vt.getID3v2Header(e,t,s);r&&(yield*e[et](r[j],s),e[tt](r[j]));const n=yield*e[et](4,s),a=Ut(n[ne](0,4)),o=t[ht](a);if(o)return new ps(o);if(255!==n[0]||n[1]<224)return null;const h=cs[24&n[1]];if(h[O]===yt)return null;const c=6&n[1];if(as[c][O]===yt)return null;const l={...as[c],...as[c][h[V]]};if(i[Q]=h[O],i[V]=l[O],i[qe]=l[qe],i[se]=ls[1&n[1]],i[j]=4,i[C]=Wt[240&n[2]][l[Yt]],i[C]===St)return null;if(i[Ge]=h[Ge][12&n[2]],i[Ge]===yt)return null;if(i[Ue]=2&n[2]&&l[Ue],i[z]=!!(1&n[2]),i[He]=Math.floor(125*i[C]*i[qe]/i[Ge]+i[Ue]),!i[He])return null;const u=192&n[3];if(i[ye]=ds[u][O],i[we]=ds[u][we],i[J]=l[J][48&n[3]],i[L]=!!(8&n[3]),i[G]=!!(4&n[3]),i[$]=us[3&n[3]],i[$]===yt)return null;i[b]=16;{const{length:e,frameLength:s,samples:r,...n}=i;t[ct](a,i,n)}return new ps(i)}constructor(e){super(e),this[C]=e[C],this[$]=e[$],this[Ue]=e[Ue],this[L]=e[L],this[G]=e[G],this[z]=e[z],this[V]=e[V],this[J]=e[J],this[Q]=e[Q],this[se]=e[se]}}class _s extends Tt{static*[lt](e,t,s){return yield*super[lt](ps,_s,e,t,s)}constructor(e,t,s){super(e,t,s)}}class ms extends Lt{constructor(e,t,s){super(e,t),this.Frame=_s,this.Header=ps,s(this[v])}get[v](){return K}*[ut](){return yield*this[ot]()}}const gs={0:"MPEG-4",8:"MPEG-2"},fs={0:"valid",2:St,4:St,6:St},bs={0:kt,1:Pt},Cs={0:"AAC Main",64:"AAC LC (Low Complexity)",128:"AAC SSR (Scalable Sample Rate)",192:"AAC LTP (Long Term Prediction)"},ys={0:96e3,4:88200,8:64e3,12:c,16:l,20:u,24:d,28:p,32:_,36:12e3,40:11025,44:m,48:7350,52:yt,56:yt,60:"frequency is written explicitly"},Ss={0:{[we]:0,[O]:"Defined in AOT Specific Config"},64:{[we]:1,[O]:r},128:{[we]:2,[O]:o(2,s[0][0])},192:{[we]:3,[O]:o(3,s[1][3])},256:{[we]:4,[O]:o(4,s[1][3],s[3][4])},320:{[we]:5,[O]:o(5,s[1][3],s[3][0])},384:{[we]:6,[O]:o(6,s[1][3],s[3][0],i)},448:{[we]:8,[O]:o(8,s[1][3],s[2][0],s[3][0],i)}};class ws extends jt{static*[ht](e,t,s){const i={},r=yield*e[et](7,s),n=Ut([r[0],r[1],r[2],252&r[3]|3&r[6]]),a=t[ht](n);if(a)Object.assign(i,a);else{if(255!==r[0]||r[1]<240)return null;if(i[Q]=gs[8&r[1]],i[V]=fs[6&r[1]],i[V]===St)return null;const e=1&r[1];i[se]=bs[e],i[j]=e?7:9,i[te]=192&r[2],i[ze]=60&r[2];const s=2&r[2];if(i[ee]=Cs[i[te]],i[Ge]=ys[i[ze]],i[Ge]===yt)return null;i[z]=!!s,i[Se]=448&(r[2]<<8|r[3]),i[ye]=Ss[i[Se]][O],i[we]=Ss[i[Se]][we],i[G]=!!(32&r[3]),i[T]=!!(8&r[3]),i[ke]=!!(8&r[3]),i[ve]=!!(4&r[3]),i[b]=16,i[qe]=1024,i[X]=3&r[6];{const{length:e,channelModeBits:s,profileBits:r,sampleRateBits:a,frameLength:o,samples:h,numberAACFrames:c,...l}=i;t[ct](n,i,l)}}if(i[He]=8191&(r[3]<<11|r[4]<<3|r[5]>>5),!i[He])return null;const o=2047&(r[5]<<6|r[6]>>2);return i[k]=2047===o?"VBR":o,new ws(i)}constructor(e){super(e),this[ke]=e[ke],this[ve]=e[ve],this[k]=e[k],this[T]=e[T],this[G]=e[G],this[z]=e[z],this[V]=e[V],this[j]=e[j],this[Q]=e[Q],this[X]=e[X],this[ee]=e[ee],this[se]=e[se]}get audioSpecificConfig(){const e=Rt.get(this),t=e[te]+64<<5|e[ze]<<5|e[Se]>>3,s=new bt(2);return new Ct(s[P]).setUint16(0,t,!1),s}}class Ps extends Tt{static*[lt](e,t,s){return yield*super[lt](ws,Ps,e,t,s)}constructor(e,t,s){super(e,t,s)}}class ks extends Lt{constructor(e,t,s){super(e,t),this.Frame=Ps,this.Header=ws,s(this[v])}get[v](){return"aac"}*[ut](){return yield*this[ot]()}}class vs extends Tt{static _getFrameFooterCrc16(e){return(e[e[j]-2]<<8)+e[e[j]-1]}static[ft](e){const t=vs._getFrameFooterCrc16(e),s=(e=>{const t=e[j],s=t-16;let i=0,r=0;for(;r<=s;)i^=e[r++]<<8|e[r++],i=xt[15][i>>8]^xt[14][255&i]^xt[13][e[r++]]^xt[12][e[r++]]^xt[11][e[r++]]^xt[10][e[r++]]^xt[9][e[r++]]^xt[8][e[r++]]^xt[7][e[r++]]^xt[6][e[r++]]^xt[5][e[r++]]^xt[4][e[r++]]^xt[3][e[r++]]^xt[2][e[r++]]^xt[1][e[r++]]^xt[0][e[r++]];for(;r!==t;)i=(255&i)<<8^xt[0][i>>8^e[r++]];return i})(e[ne](0,-2));return t===s}constructor(e,t,s){t[We]=s,t[I]=vs._getFrameFooterCrc16(e),super(t,e,Rt.get(t)[qe])}}const Fs="get from STREAMINFO metadata block",xs={0:"Fixed",1:"Variable"},Hs={0:yt,16:192};for(let e=2;e<16;e++)Hs[e<<4]=e<6?576*2**(e-2):2**e;const Is={0:Fs,1:88200,2:176400,3:192e3,4:m,5:_,6:p,7:d,8:u,9:l,10:c,11:96e3,15:St},Ms={0:{[we]:1,[O]:r},16:{[we]:2,[O]:o(2,s[0][0])},32:{[we]:3,[O]:o(3,s[0][1])},48:{[we]:4,[O]:o(4,s[1][0],s[3][0])},64:{[we]:5,[O]:o(5,s[1][1],s[3][0])},80:{[we]:6,[O]:o(6,s[1][1],i,s[3][0])},96:{[we]:7,[O]:o(7,s[1][1],i,s[3][4],s[2][0])},112:{[we]:8,[O]:o(8,s[1][1],i,s[3][0],s[2][0])},128:{[we]:2,[O]:`${n} (left, diff)`},144:{[we]:2,[O]:`${n} (diff, right)`},160:{[we]:2,[O]:`${n} (avg, diff)`},176:yt,192:yt,208:yt,224:yt,240:yt},Us={0:Fs,2:8,4:12,6:yt,8:16,10:20,12:24,14:yt};class Os extends jt{static _decodeUTF8Int(e){if(e[0]>254)return null;if(e[0]<128)return{value:e[0],length:1};let t=1;for(let s=64;s&e[0];s>>=1)t++;let s=t-1,i=0,r=0;for(;s>0;r+=6,s--){if(128!=(192&e[s]))return null;i|=(63&e[s])<<r}return i|=(e[s]&127>>t)<<r,{value:i,length:t}}static[gt](e,t){const s={[et]:function*(){return e}};return Os[ht](s,t,0).next().value}static*[ht](e,t,s){let i=yield*e[et](6,s);if(255!==i[0]||248!==i[1]&&249!==i[1])return null;const r={},n=Ut(i[ne](0,4)),a=t[ht](n);if(a)Object.assign(r,a);else{if(r[de]=1&i[1],r[ue]=xs[r[de]],r[ge]=240&i[2],r[ze]=15&i[2],r[pe]=Hs[r[ge]],r[pe]===yt)return null;if(r[Ge]=Is[r[ze]],r[Ge]===St)return null;if(1&i[3])return null;const e=Ms[240&i[3]];if(e===yt)return null;if(r[we]=e[we],r[ye]=e[O],r[b]=Us[14&i[3]],r[b]===yt)return null}r[j]=5,i=yield*e[et](r[j]+8,s);const o=Os._decodeUTF8Int(i[ne](4));if(!o)return null;if(r[de]?r[Ee]=o.value:r[Me]=o.value,r[j]+=o[j],96===r[ge]?(i[j]<r[j]&&(i=yield*e[et](r[j],s)),r[pe]=i[r[j]-1]+1,r[j]+=1):112===r[ge]&&(i[j]<r[j]&&(i=yield*e[et](r[j],s)),r[pe]=(i[r[j]-1]<<8)+i[r[j]]+1,r[j]+=2),r[qe]=r[pe],12===r[ze]?(i[j]<r[j]&&(i=yield*e[et](r[j],s)),r[Ge]=1e3*i[r[j]-1],r[j]+=1):13===r[ze]?(i[j]<r[j]&&(i=yield*e[et](r[j],s)),r[Ge]=(i[r[j]-1]<<8)+i[r[j]],r[j]+=2):14===r[ze]&&(i[j]<r[j]&&(i=yield*e[et](r[j],s)),r[Ge]=10*((i[r[j]-1]<<8)+i[r[j]]),r[j]+=2),i[j]<r[j]&&(i=yield*e[et](r[j],s)),r[H]=i[r[j]-1],r[H]!==(e=>{let t=0;const s=e[j];for(let i=0;i!==s;i++)t=Ft[t^e[i]];return t})(i[ne](0,r[j]-1)))return null;if(!a){const{blockingStrategyBits:e,frameNumber:s,sampleNumber:i,samples:a,sampleRateBits:o,blockSizeBits:h,crc:c,length:l,...u}=r;t[ct](n,r,u)}return new Os(r)}constructor(e){super(e),this[I]=null,this[ue]=e[ue],this[pe]=e[pe],this[Me]=e[Me],this[Ee]=e[Ee],this[We]=null}}class Ns extends Lt{constructor(e,t,s){super(e,t),this.Frame=vs,this.Header=Os,s(this[v])}get[v](){return"flac"}*_getNextFrameSyncOffset(e){const t=yield*this._codecParser[et](2,0),s=t[j]-2;for(;e<s;){if(255===t[e]){const s=t[e+1];if(248===s||249===s)break;255!==s&&e++}e++}return e}*[ut](){for(;;){const e=yield*Os[ht](this._codecParser,this._headerCache,0);if(e){let t=Rt.get(e)[j]+2;for(;t<=524288;){if(this._codecParser._flushing||(yield*Os[ht](this._codecParser,this._headerCache,t))){let s=yield*this._codecParser[et](t);if(this._codecParser._flushing||(s=s[ne](0,t)),vs[ft](s)){const i=new vs(s,e);return this._headerCache[mt](),this._codecParser[tt](t),this._codecParser[it](i),i}}t=yield*this._getNextFrameSyncOffset(t+1)}this._codecParser[rt](`Unable to sync FLAC frame after searching ${t} bytes.`),this._codecParser[tt](t)}else this._codecParser[tt](yield*this._getNextFrameSyncOffset(1))}}[dt](e){return 0===e[De]?(this._headerCache[mt](),this._streamInfo=e[U][ne](13)):1===e[De]||(e[F]=Bt.get(e)[re].map((e=>{const t=Os[gt](e,this._headerCache);if(t)return new vs(e,t,this._streamInfo);this._codecParser[rt]("Failed to parse Ogg FLAC frame","Skipping invalid FLAC frame")})).filter((e=>!!e))),e}}class $s{static*[ht](e,t,s){const i={};let r=yield*e[et](28,s);if(79!==r[0]||103!==r[1]||103!==r[2]||83!==r[3])return null;i[Ke]=r[4];if(248&r[5])return null;i[E]=!!(4&r[5]),i[D]=!!(2&r[5]),i[B]=!!(1&r[5]);const n=new Ct(bt.from(r[ne](0,28))[P]);i[g]=((e,t)=>{try{return e.getBigInt64(t,!0)}catch{const s=128&e.getUint8(t+7)?-1:1;let i=e.getUint32(t,!0),r=e.getUint32(t+4,!0);return-1===s&&(i=1+~i,r=1+~r),r>1048575&&console.warn("This platform does not support BigInt"),s*(i+r*2**32)}})(n,6),i[Je]=n.getInt32(14,!0),i[De]=n.getInt32(18,!0),i[Re]=n.getInt32(22,!0);const a=r[26];i[j]=a+27,r=yield*e[et](i[j],s),i[He]=0,i[Le]=[],i[Be]=bt.from(r[ne](27,i[j]));for(let e=0,t=0;e<a;e++){const s=i[Be][e];i[He]+=s,t+=s,255===s&&e!==a-1||(i[Le].push(t),t=0)}return new $s(i)}constructor(e){Rt.set(this,e),this[g]=e[g],this[B]=e[B],this[D]=e[D],this[E]=e[E],this[Le]=e[Le],this[De]=e[De],this[Re]=e[Re],this[Je]=e[Je]}}class As extends Dt{static*[lt](e,t,s){const i=yield*$s[ht](e,t,s);if(i){const t=Rt.get(i)[He],s=Rt.get(i)[j],r=s+t,n=(yield*e[et](r,0))[ne](0,r),a=n[ne](s,r);return new As(i,a,n)}return null}constructor(e,t,s){super(e,t),Bt.get(this)[j]=s[j],this[F]=[],this[ie]=s,this[g]=e[g],this[M]=e[Re],this[N]=0,this[B]=e[B],this[D]=e[D],this[E]=e[E],this[De]=e[De],this[qe]=0,this[Je]=e[Je]}}class Rs extends Tt{constructor(e,t,s){super(t,e,s)}}const Bs={0:h.slice(0,2),1:h},Ls="SILK-only",Ds="CELT-only",Ts="Hybrid",Es="narrowband",Gs="medium-band",zs="wideband",qs="super-wideband",Vs="fullband",js={0:{[W]:Ls,[f]:Es,[Oe]:10},8:{[W]:Ls,[f]:Es,[Oe]:20},16:{[W]:Ls,[f]:Es,[Oe]:40},24:{[W]:Ls,[f]:Es,[Oe]:60},32:{[W]:Ls,[f]:Gs,[Oe]:10},40:{[W]:Ls,[f]:Gs,[Oe]:20},48:{[W]:Ls,[f]:Gs,[Oe]:40},56:{[W]:Ls,[f]:Gs,[Oe]:60},64:{[W]:Ls,[f]:zs,[Oe]:10},72:{[W]:Ls,[f]:zs,[Oe]:20},80:{[W]:Ls,[f]:zs,[Oe]:40},88:{[W]:Ls,[f]:zs,[Oe]:60},96:{[W]:Ts,[f]:qs,[Oe]:10},104:{[W]:Ts,[f]:qs,[Oe]:20},112:{[W]:Ts,[f]:Vs,[Oe]:10},120:{[W]:Ts,[f]:Vs,[Oe]:20},128:{[W]:Ds,[f]:Es,[Oe]:2.5},136:{[W]:Ds,[f]:Es,[Oe]:5},144:{[W]:Ds,[f]:Es,[Oe]:10},152:{[W]:Ds,[f]:Es,[Oe]:20},160:{[W]:Ds,[f]:zs,[Oe]:2.5},168:{[W]:Ds,[f]:zs,[Oe]:5},176:{[W]:Ds,[f]:zs,[Oe]:10},184:{[W]:Ds,[f]:zs,[Oe]:20},192:{[W]:Ds,[f]:qs,[Oe]:2.5},200:{[W]:Ds,[f]:qs,[Oe]:5},208:{[W]:Ds,[f]:qs,[Oe]:10},216:{[W]:Ds,[f]:qs,[Oe]:20},224:{[W]:Ds,[f]:Vs,[Oe]:2.5},232:{[W]:Ds,[f]:Vs,[Oe]:5},240:{[W]:Ds,[f]:Vs,[Oe]:10},248:{[W]:Ds,[f]:Vs,[Oe]:20}};class Ws extends jt{static[gt](e,t,s){const i={};if(i[we]=e[9],i[be]=e[18],i[j]=0!==i[be]?21+i[we]:19,e[j]<i[j])throw new Error("Out of data while inside an Ogg Page");const r=3&t[0],n=3===r?2:1,a=Ut(e[ne](0,i[j]))+Ut(t[ne](0,n)),o=s[ht](a);if(o)return new Ws(o);if("OpusHead"!==a.substr(0,8))return null;if(1!==e[8])return null;i[U]=bt.from(e[ne](0,i[j]));const h=new Ct(i[U][P]);if(i[b]=16,i[Z]=h.getUint16(10,!0),i[$e]=h.getUint32(12,!0),i[Ge]=c,i[Y]=h.getInt16(16,!0),i[be]in Bs&&(i[ye]=Bs[i[be]][i[we]-1],!i[ye]))return null;0!==i[be]&&(i[je]=e[19],i[x]=e[20],i[Ce]=[...e[ne](21,i[we]+21)]);const l=js[248&t[0]];switch(i[W]=l[W],i[f]=l[f],i[Oe]=l[Oe],r){case 0:i[xe]=1;break;case 1:case 2:i[xe]=2;break;case 3:i[q]=!!(128&t[1]),i[A]=!!(64&t[1]),i[xe]=63&t[1];break;default:return null}{const{length:e,data:t,channelMappingFamily:r,...n}=i;s[ct](a,i,n)}return new Ws(i)}constructor(e){super(e),this[U]=e[U],this[f]=e[f],this[be]=e[be],this[Ce]=e[Ce],this[x]=e[x],this[xe]=e[xe],this[Oe]=e[Oe],this[A]=e[A],this[$e]=e[$e],this[q]=e[q],this[W]=e[W],this[Y]=e[Y],this[Z]=e[Z],this[je]=e[je]}}class Js extends Lt{constructor(e,t,s){super(e,t),this.Frame=Rs,this.Header=Ws,s(this[v]),this._identificationHeader=null,this._preSkipRemaining=null}get[v](){return"opus"}[dt](e){return 0===e[De]?(this._headerCache[mt](),this._identificationHeader=e[U]):1===e[De]||(e[F]=Bt.get(e)[re].map((e=>{const t=Ws[gt](this._identificationHeader,e,this._headerCache);if(t){null===this._preSkipRemaining&&(this._preSkipRemaining=t[Z]);let s=t[Oe]*t[xe]/1e3*t[Ge];return this._preSkipRemaining>0&&(this._preSkipRemaining-=s,s=this._preSkipRemaining<0?-this._preSkipRemaining:0),new Rs(e,t,s)}this._codecParser[nt]("Failed to parse Ogg Opus Header","Not a valid Ogg Opus file")}))),e}}class Ks extends Tt{constructor(e,t,s){super(t,e,s)}}const Qs={};for(let e=0;e<8;e++)Qs[e+6]=2**(6+e);class Xs extends jt{static[gt](e,t,s,i){if(e[j]<30)throw new Error("Out of data while inside an Ogg Page");const r=Ut(e[ne](0,30)),n=t[ht](r);if(n)return new Xs(n);const a={[j]:30};if("vorbis"!==r.substr(0,7))return null;a[U]=bt.from(e[ne](0,30));const o=new Ct(a[U][P]);if(a[ae]=o.getUint32(7,!0),0!==a[ae])return null;if(a[we]=e[11],a[ye]=h[a[we]-1]||"application defined",a[Ge]=o.getUint32(12,!0),a[y]=o.getInt32(16,!0),a[w]=o.getInt32(20,!0),a[S]=o.getInt32(24,!0),a[me]=Qs[(240&e[28])>>4],a[_e]=Qs[15&e[28]],a[_e]>a[me])return null;if(1!==e[29])return null;a[b]=32,a[ce]=i,a[he]=s;{const{length:e,data:s,version:i,vorbisSetup:n,vorbisComments:o,...h}=a;t[ct](r,a,h)}return new Xs(a)}constructor(e){super(e),this[y]=e[y],this[S]=e[S],this[w]=e[w],this[_e]=e[_e],this[me]=e[me],this[U]=e[U],this[he]=e[he],this[ce]=e[ce]}}class Ys extends Lt{constructor(e,t,s){super(e,t),this.Frame=Ks,s(this[v]),this._identificationHeader=null,this._setupComplete=!1,this._prevBlockSize=null}get[v](){return oe}[dt](e){e[F]=[];for(const t of Bt.get(e)[re])if(1===t[0])this._headerCache[mt](),this._identificationHeader=e[U],this._setupComplete=!1;else if(3===t[0])this._vorbisComments=t;else if(5===t[0])this._vorbisSetup=t,this._mode=this._parseSetupHeader(t),this._setupComplete=!0;else if(this._setupComplete){const s=Xs[gt](this._identificationHeader,this._headerCache,this._vorbisComments,this._vorbisSetup);s?e[F].push(new Ks(t,s,this._getSamples(t,s))):this._codecParser[logError]("Failed to parse Ogg Vorbis Header","Not a valid Ogg Vorbis file")}return e}_getSamples(e,t){const s=this._mode.blockFlags[e[0]>>1&this._mode.mask]?t[me]:t[_e],i=null===this._prevBlockSize?0:(this._prevBlockSize+s)/4;return this._prevBlockSize=s,i}_parseSetupHeader(e){const t=new $t(e),s={count:0,blockFlags:[]};for(;1&~t.read(1););let i;for(;s.count<64&&t.position>0;){Nt(t.read(8));let e=0;for(;0===t.read(8)&&e++<3;);if(4!==e){1+((126&Nt(i))>>1)!==s.count&&this._codecParser[rt]("vorbis derived mode count did not match actual mode count");break}i=t.read(7),s.blockFlags.unshift(1&i),t.position+=6,s.count++}return s.mask=(1<<Math.log2(s.count))-1,s}}class Zs{constructor(e,t,s){this._codecParser=e,this._headerCache=t,this._onCodec=s,this._continuedPacket=new bt,this._codec=null,this._isSupported=null,this._previousAbsoluteGranulePosition=null}get[v](){return this._codec||""}_updateCodec(e,t){this._codec!==e&&(this._headerCache[_t](),this._parser=new t(this._codecParser,this._headerCache,this._onCodec),this._codec=e)}_checkCodecSupport({data:e}){const t=Ut(e[ne](0,8));switch(t){case"fishead\0":return!1;case"OpusHead":return this._updateCodec("opus",Js),!0;case/^\x7fFLAC/.test(t)&&t:return this._updateCodec("flac",Ns),!0;case/^\x01vorbis/.test(t)&&t:return this._updateCodec(oe,Ys),!0;default:return!1}}_checkPageSequenceNumber(e){e[De]!==this._pageSequenceNumber+1&&this._pageSequenceNumber>1&&e[De]>1&&this._codecParser[rt]("Unexpected gap in Ogg Page Sequence Number.",`Expected: ${this._pageSequenceNumber+1}, Got: ${e[De]}`),this._pageSequenceNumber=e[De]}_parsePage(e){null===this._isSupported&&(this._pageSequenceNumber=e[De],this._isSupported=this._checkCodecSupport(e)),this._checkPageSequenceNumber(e);const t=Bt.get(e),s=Rt.get(t[R]);let i=0;if(t[re]=s[Le].map((t=>e[U][ne](i,i+=t))),this._continuedPacket[j]&&(t[re][0]=Mt(this._continuedPacket,t[re][0]),this._continuedPacket=new bt),255===s[Be][s[Be][j]-1]&&(this._continuedPacket=Mt(this._continuedPacket,t[re].pop())),null!==this._previousAbsoluteGranulePosition&&(e[qe]=Number(e[g]-this._previousAbsoluteGranulePosition)),this._previousAbsoluteGranulePosition=e[g],this._isSupported){const t=this._parser[dt](e);return this._codecParser[it](t),t}return e}}class ei extends Lt{constructor(e,t,s){super(e,t),this._onCodec=s,this.Frame=As,this.Header=$s,this._streams=new Map,this._currentSerialNumber=null}get[v](){const e=this._streams.get(this._currentSerialNumber);return e?e.codec:""}*[ut](){const e=yield*this[ot](!0);this._currentSerialNumber=e[Je];let t=this._streams.get(this._currentSerialNumber);return t||(t=new Zs(this._codecParser,this._headerCache,this._onCodec),this._streams.set(this._currentSerialNumber,t)),e[E]&&this._streams.delete(this._currentSerialNumber),t._parsePage(e)}}const ti=()=>{};const si=g,ii=f,ri=b,ni=C,ai=y,oi=S,hi=w,ci=P,li=k,ui=v,di=F,pi=x,_i=H,mi=I,gi=M,fi=U,bi=O,Ci=N,yi=$,Si=A,wi=R,Pi=B,ki=L,vi=D,Fi=T,xi=E,Hi=G,Ii=z,Mi=q,Ui=V,Oi=j,Ni=W,$i=J,Ai=K,Ri=Q,Bi=X,Li=Y,Di=Z,Ti=ee,Ei=se,Gi=ie,zi=re,qi=ne,Vi=ae,ji=oe,Wi=he,Ji=ce,Ki=ue,Qi=pe,Xi=_e,Yi=me,Zi=be,er=Ce,tr=ye,sr=we,ir=ke,rr=ve,nr=Fe,ar=xe,or=He,hr=Me,cr=Ue,lr=Oe,ur=$e,dr=Re,pr=Le,_r=De,mr=Ee,gr=Ge,fr=qe,br=je,Cr=We,yr=Je,Sr=Ke,wr=Xe,Pr=Ye,kr=Ze;return e.CodecParser=class{constructor(e,{onCodec:t,onCodecHeader:s,onCodecUpdate:i,enableLogging:r=!1,enableFrameCRC32:n=!0}={}){this._inputMimeType=e,this._onCodec=t||ti,this._onCodecHeader=s||ti,this._onCodecUpdate=i,this._enableLogging=r,this._crc32=n?It:ti,this[_t]()}get[v](){return this._parser?this._parser[v]:""}[_t](){this._headerCache=new At(this._onCodecHeader,this._onCodecUpdate),this._generator=this._getGenerator(),this._generator.next()}*flush(){this._flushing=!0;for(let e=this._generator.next();e.value;e=this._generator.next())yield e.value;this._flushing=!1,this[_t]()}*parseChunk(e){for(let t=this._generator.next(e);t.value;t=this._generator.next())yield t.value}parseAll(e){return[...this.parseChunk(e),...this.flush()]}*_getGenerator(){if(this._inputMimeType.match(/aac/))this._parser=new ks(this,this._headerCache,this._onCodec);else if(this._inputMimeType.match(/mpeg/))this._parser=new ms(this,this._headerCache,this._onCodec);else if(this._inputMimeType.match(/flac/))this._parser=new Ns(this,this._headerCache,this._onCodec);else{if(!this._inputMimeType.match(/ogg/))throw new Error(`Unsupported Codec ${mimeType}`);this._parser=new ei(this,this._headerCache,this._onCodec)}for(this._frameNumber=0,this._currentReadPosition=0,this._totalBytesIn=0,this._totalBytesOut=0,this._totalSamples=0,this._sampleRate=void 0,this._rawData=new Uint8Array(0);;){const e=yield*this._parser[ut]();e&&(yield e)}}*[et](e=0,t=0){let s;for(;this._rawData[j]<=e+t;){if(s=yield,this._flushing)return this._rawData[ne](t);s&&(this._totalBytesIn+=s[j],this._rawData=Mt(this._rawData,s))}return this._rawData[ne](t)}[tt](e){this._currentReadPosition+=e,this._rawData=this._rawData[ne](e)}[st](e){this._sampleRate=e[R][Ge],e[R][C]=e[N]>0?8*Math.round(e[U][j]/e[N]):0,e[Me]=this._frameNumber++,e[Xe]=this._totalBytesOut,e[Ze]=this._totalSamples,e[Ye]=this._totalSamples/this._sampleRate*1e3,e[M]=this._crc32(e[U]),this._headerCache[pt](e[R][C],e[Ye]),this._totalBytesOut+=e[U][j],this._totalSamples+=e[qe]}[it](e){if(e[F]){if(e[E]){let t=e[qe];e[F].forEach((e=>{const s=e[qe];t<s&&(e[qe]=t>0?t:0,e[N]=e[qe]/e[R][Ge]*1e3),t-=s,this[st](e)}))}else e[qe]=0,e[F].forEach((t=>{e[qe]+=t[qe],this[st](t)}));e[N]=e[qe]/this._sampleRate*1e3||0,e[Ze]=this._totalSamples,e[Ye]=this._totalSamples/this._sampleRate*1e3||0,e[Xe]=this._totalBytesOut}else this[st](e)}_log(e,t){if(this._enableLogging){const s=[`${v}: ${this[v]}`,`inputMimeType: ${this._inputMimeType}`,`readPosition: ${this._currentReadPosition}`,`totalBytesIn: ${this._totalBytesIn}`,`${Xe}: ${this._totalBytesOut}`],i=Math.max(...s.map((e=>e[j])));t.push(`--stats--${"-".repeat(i-9)}`,...s,"-".repeat(i)),e("codec-parser",t.reduce(((e,t)=>e+"\n "+t),""))}}[rt](...e){this._log(console.warn,e)}[nt](...e){this._log(console.error,e)}},e.absoluteGranulePosition=si,e.bandwidth=ii,e.bitDepth=ri,e.bitrate=ni,e.bitrateMaximum=ai,e.bitrateMinimum=oi,e.bitrateNominal=hi,e.blockSize=Qi,e.blockingStrategy=Ki,e.blocksize0=Xi,e.blocksize1=Yi,e.buffer=ci,e.bufferFullness=li,e.channelMappingFamily=Zi,e.channelMappingTable=er,e.channelMode=tr,e.channels=sr,e.codec=ui,e.codecFrames=di,e.copyrightId=ir,e.copyrightIdStart=rr,e.coupledStreamCount=pi,e.crc=_i,e.crc16=mi,e.crc32=gi,e.data=fi,e.description=bi,e.duration=Ci,e.emphasis=yi,e.frame=nr,e.frameCount=ar,e.frameLength=or,e.frameNumber=hr,e.framePadding=cr,e.frameSize=lr,e.hasOpusPadding=Si,e.header=wi,e.inputSampleRate=ur,e.isContinuedPacket=Pi,e.isCopyrighted=ki,e.isFirstPage=vi,e.isHome=Fi,e.isLastPage=xi,e.isOriginal=Hi,e.isPrivate=Ii,e.isVbr=Mi,e.layer=Ui,e.length=Oi,e.mode=Ni,e.modeExtension=$i,e.mpeg=Ai,e.mpegVersion=Ri,e.numberAACFrames=Bi,e.outputGain=Li,e.pageChecksum=dr,e.pageSegmentTable=pr,e.pageSequenceNumber=_r,e.preSkip=Di,e.profile=Ti,e.protection=Ei,e.rawData=Gi,e.sampleNumber=mr,e.sampleRate=gr,e.samples=fr,e.segments=zi,e.streamCount=br,e.streamInfo=Cr,e.streamSerialNumber=yr,e.streamStructureVersion=Sr,e.subarray=qi,e.totalBytesOut=wr,e.totalDuration=Pr,e.totalSamples=kr,e.version=Vi,e.vorbis=ji,e.vorbisComments=Wi,e.vorbisSetup=Ji,e}({});
|