/*! 
 * Copyright 2021-2024 Ethan Halsall
 * https://github.com/eshaz/icecast-metadata-js
 *
 * This file is part of icecast-metadata-player.
 *
 * icecast-metadata-player free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * icecast-metadata-player distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see 
 */
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o¦eà|¶qdoooo`;class r{constructor(d={}){this.o=d.correlationSampleSize>0?d.correlationSampleSize:11025,this.t=d.initialGranularity>0?d.initialGranularity:16,this.h=d.correlationThreshold>=0?d.correlationThreshold:.5,this.i=!0===d.shared,this.q=h.get(r),this.p=s.get(r),this.q||(this.i?(this.q=WebAssembly.compile((0,e.D4)(g)),this.p=Promise.resolve(66560)):(this.q=t().then(d=>d?WebAssembly.compile((0,e.D4)(n)):WebAssembly.compile((0,e.D4)(i))),this.p=t().then(d=>66560)),h.set(this.q),s.set(this.p)),this.SynAudioWorker=function d(f,a,e,t,h){this.l=new Map,this.H=(d,f)=>Math.min(d.samplesDecoded,f.samplesDecoded,this.o),this.T=(d,f)=>Math.min(d.samplesDecoded,f.samplesDecoded,this.t),this.u=(d,f,a)=>{const e=new Float32Array(f.buffer);let o=a/this.J;for(let f=0;f{const e=4+(a+d.samplesDecoded*d.channelData.length*this.J+f.reduce((d,f)=>f.data.samplesDecoded*f.data.channelData.length*this.J+d,0)+f.length*this.J+f.length*this.m)/this.k;return new WebAssembly.Memory({initial:e,maximum:e,shared:this.i})},this.j=(d,f,a)=>[a,this.u(d.channelData,f,a)],this.R=(d,f,a)=>{const e=this.u(d.channelData,f,a),o=e+this.J;return[a,e,o,o+this.J]},this.I=(f,a)=>{let e=this.l.get(f);if(!e){let a,o="text/javascript",t=`'use strict';(${((d,f,a,e,o)=>{self.onmessage=t=>{new d(Promise.resolve(t.data.module),Promise.resolve(t.data.heapBase),a,e,o).v.get(f).apply(null,t.data.params).then(d=>{self.postMessage(d)})}}).toString()})(${d.toString()}, "${f}", ${this.i}, ${this.o}, ${this.t})`;try{a=void 0!==process.versions.node}catch{}e=a?`data:${o};base64,${Buffer.from(t).toString("base64")}`:URL.createObjectURL(new Blob([t],{type:o})),this.l.set(f,e)}const t=new(globalThis.Worker||o)(e,{name:"SynAudio"}),h=new Promise(d=>{t.onmessage=f=>{t.terminate(),d(f.data)}});return Promise.all([this.q,this.p]).then(([d,f])=>{t.postMessage({module:d,heapBase:f,params:a})}),h},this.M=(d,f,a,e,o,t,h,s,n,i,g)=>this.q.then(f=>WebAssembly.instantiate(f,{env:{memory:d}})).then(({exports:r})=>{const z=new Map(Object.entries(r)).get("correlate"),q=new DataView(d.buffer);z(f,a,e,o,t,h,s,n,i,g);return{correlation:q.getFloat32(i,!0),sampleOffset:q.getUint32(g,!0)}}),this.W=(d,f)=>this.p.then(a=>{const e=this.S(d,[{data:f}],a);let o,t,h,s,n;[o,n]=this.j(d,e,a),[t,h,s,n]=this.R(f,e,n);const i=this.H(d,f),g=this.T(d,f);return this.M(e,o,d.samplesDecoded,d.channelData.length,t,f.samplesDecoded,f.channelData.length,i,g,h,s)}),this.$=(d,f,a=1,e=()=>{})=>this.p.then(o=>{const t=this.S(d,f,o);let h,s,n,i,g;[h,g]=this.j(d,t,o);const r=f.map(f=>{[s,n,i,g]=this.R(f.data,t,g);const a=this.H(d,f.data),e=this.T(d,f.data);let o=f.syncStart||0,r=f.syncEnd||d.samplesDecoded;r-o{e(0);const o=()=>{if(z>=r.length)return void(0===q&&d(y));const t=z++;q++;const h=this.I("_runCorrelate",r[t][0]).then(d=>{d.sampleOffset+=r[t][1],d.name=r[t][2],y[t]=d}).catch(f).finally(()=>{q--,p++,e(p/y.length),o()});l.push(h),q{const e=[],o=[0],t=this.H(d,f),h=Math.log(d.samplesDecoded*t)/Math.log(this.t+1)*Math.log(t/1e4+1);a=Math.max(Math.round(Math.min(a,h,d.samplesDecoded/t/4)),1);const s=Math.ceil(d.samplesDecoded/a);let n=0;for(let h=0;h{let f=0,a=-1;for(let e=0;ea&&(f=e,a=d[e].correlation);return{correlation:d[f].correlation,sampleOffset:d[f].sampleOffset+o[f]}})},this.P=(d,f)=>this.I("_sync",[d,f]),this._=(d,f,a)=>globalThis.Worker?this.I("_syncWorkerConcurrent",[d,f,a]):this.A(d,f,a),this.v=new Map([["_sync",this.W],["_runCorrelate",this.M],["_syncOneToMany",this.$],["_syncWorker",this.P],["_syncWorkerConcurrent",this.A]]),this.q=f,this.p=a,this.i=e,this.o=t,this.t=h,this.k=65536,this.J=Float32Array.BYTES_PER_ELEMENT,this.m=Uint32Array.BYTES_PER_ELEMENT},this.O=new this.SynAudioWorker(this.q,this.p,this.i,this.o,this.t)}async syncWorkerConcurrent(d,f,a){return this.O._(d,f,a>=1?a:1)}async syncWorker(d,f){return this.O.P(d,f)}async sync(d,f){return this.O.W(d,f)}async syncOneToMany(d,f,a,e){const o=this.O.$(d,f,a,e);return d=null,f=null,o}async syncMultiple(d,f){f=f>=1?f:8;const a=[],e=[];let o=()=>{},t=Promise.resolve(),h=0;const s=()=>{t=new Promise(d=>{o=d})};for(let f=0;f{d.correlation>this.h&&g.edges.add({parent:g,vertex:q.vertex,samplesDecoded:z.data.samplesDecoded,...d}),h--,o()})),h>=f&&(s(),await t)}}await Promise.all(a);const n=(d,f)=>d.parent&&f.parent&&d.parent.samplesDecoded!==f.parent.samplesDecoded?d.parent.samplesDecoded>f.parent.samplesDecoded:d.correlation!==f.correlation?d.correlation>f.correlation:d.sampleOffset!==f.sampleOffset?d.sampleOffset>f.sampleOffset:d.vertex&&f.vertex&&d.vertex.name.localeCompare(f.vertex.name)<0,i=new Map,g=new Set,r=d=>{for(const f of d.edges.values()){if(i.has(d))return i.get(d);i.set(d,f);const a=r(f.vertex),e=f;if(a){let d,f;n(a,e)?(d=a,f=e):(d=e,f=a),f.cycleWith||(f.cycleWith=new Set,g.add(f)),f.cycleWith.add(d),d.cycleWith&&d.cycleWith.delete(f)}i.delete(d)}};for(const{vertex:d}of e)r(d);for(const d of g)d.cycleWith.size&&d.parent.edges.delete(d);const z=new Set;for(const d of e)z.add(d.vertex);for(const d of e)for(const f of d.vertex.edges)z.delete(f.vertex);const q=(d,f,a,e=0)=>{for(const o of a)d.has(o.vertex)&&n(d.get(o.vertex),o)||d.set(o.vertex,{name:o.vertex.name,correlation:o.correlation,sampleOffset:e+o.sampleOffset}),q(d,f,o.vertex.edges,e+o.sampleOffset)},p=[];for(const d of z){const f=new Map;f.set(d,{name:d.name,sampleOffset:0}),q(f,d,d.edges),p.push([...f.values()].sort((d,f)=>d.sampleOffset-f.sampleOffset||(d.correlation||0)-(f.correlation||0)||f.name.localeCompare(d.name)))}return p}}const z=r}}]);
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