mediabunny/dist/metamuxer.min.mjs

var ne=class{constructor(r){this.tracks=[];this.started=!1;this.finalizing=!1;if(r.target.output)throw new Error("Target is already used for another output.");r.target.output=this,this.writer=r.target.createWriter(),this.muxer=r.format.createMuxer(this)}addVideoTrack(r,e={}){this.addTrack("video",r,e)}addAudioTrack(r,e={}){this.addTrack("audio",r,e)}addSubtitleTrack(r,e={}){this.addTrack("subtitle",r,e)}addTrack(r,e,t){if(this.started)throw new Error("Cannot add track after output has started.");if(e.connectedTrack)throw new Error("Source is already used for a track.");let i={id:this.tracks.length+1,output:this,type:r,source:e,metadata:t};this.muxer.beforeTrackAdd(i),this.tracks.push(i),e.connectedTrack=i}start(){if(this.started)throw new Error("Output already started.");this.started=!0,this.muxer.start();for(let r of this.tracks)r.source.start()}async finalize(){if(this.finalizing)throw new Error("Cannot call finalize twice.");this.finalizing=!0;let r=this.tracks.map(e=>e.source.flush());await Promise.all(r),this.muxer.finalize(),this.writer.flush(),this.writer.finalize()}};function d(s){if(!s)throw new Error("Assertion failed.")}var U=s=>s&&s[s.length-1],O=s=>s>=0&&s<2**32,v=(s,r,e)=>{let t=0;for(let i=r;i<e;i++){let n=Math.floor(i/8),o=s[n],l=7-(i&7),a=(o&1<<l)>>l;t<<=1,t|=a}return t},ve=(s,r,e,t)=>{for(let i=r;i<e;i++){let n=Math.floor(i/8),o=s[n],l=7-(i&7);o&=~(1<<l),o|=(t&1<<e-i-1)>>e-i-1<<l,s[n]=o}},z=s=>s instanceof ArrayBuffer?new Uint8Array(s):new Uint8Array(s.buffer,s.byteOffset,s.byteLength);var h=new Uint8Array(8),w=new DataView(h.buffer),k=s=>[(s%256+256)%256],m=s=>(w.setUint16(0,s,!1),[h[0],h[1]]),Ke=s=>(w.setInt16(0,s,!1),[h[0],h[1]]),Ee=s=>(w.setUint32(0,s,!1),[h[1],h[2],h[3]]),u=s=>(w.setUint32(0,s,!1),[h[0],h[1],h[2],h[3]]),Ge=s=>(w.setInt32(0,s,!1),[h[0],h[1],h[2],h[3]]),V=s=>(w.setUint32(0,Math.floor(s/2**32),!1),w.setUint32(4,s,!1),[h[0],h[1],h[2],h[3],h[4],h[5],h[6],h[7]]),ae=s=>(w.setInt16(0,2**8*s,!1),[h[0],h[1]]),S=s=>(w.setInt32(0,2**16*s,!1),[h[0],h[1],h[2],h[3]]),oe=s=>(w.setInt32(0,2**30*s,!1),[h[0],h[1],h[2],h[3]]),x=(s,r=!1)=>{let e=Array(s.length).fill(null).map((t,i)=>s.charCodeAt(i));return r&&e.push(0),e},ue=s=>{let r=null;for(let e of s)(!r||e.timestamp>r.timestamp)&&(r=e);return r},Ue=s=>{let r=s*(Math.PI/180),e=Math.cos(r),t=Math.sin(r);return[e,t,0,-t,e,0,0,0,1]},ze=Ue(0),Me=s=>[S(s[0]),S(s[1]),oe(s[2]),S(s[3]),S(s[4]),oe(s[5]),S(s[6]),S(s[7]),oe(s[8])],p=(s,r,e)=>({type:s,contents:r&&new Uint8Array(r.flat(10)),children:e}),f=(s,r,e,t,i)=>p(s,[k(r),Ee(e),t??[]],i),Pe=s=>{let r=512;return s.fragmented?p("ftyp",[x("iso5"),u(r),x("iso5"),x("iso6"),x("mp41")]):p("ftyp",[x("isom"),u(r),x("isom"),s.holdsAvc?x("avc1"):[],x("mp41")])},L=s=>({type:"mdat",largeSize:s}),Fe=s=>({type:"free",size:s}),W=(s,r,e=!1)=>p("moov",void 0,[je(r,s),...s.map(t=>qe(t,r)),e?Ct(s):null]),je=(s,r)=>{let e=y(Math.max(0,...r.filter(o=>o.samples.length>0).map(o=>{let l=ue(o.samples);return l.timestamp+l.duration})),X),t=Math.max(...r.map(o=>o.track.id))+1,i=!O(s)||!O(e),n=i?V:u;return f("mvhd",+i,0,[n(s),n(s),u(X),n(e),S(1),ae(1),Array(10).fill(0),Me(ze),Array(24).fill(0),u(t)])},qe=(s,r)=>p("trak",void 0,[Xe(s,r),Le(s,r)]),Xe=(s,r)=>{let e=ue(s.samples),t=y(e?e.timestamp+e.duration:0,X),i=!O(r)||!O(t),n=i?V:u,o;if(s.type==="video"){let l=s.track.metadata.rotation;o=l===void 0||typeof l=="number"?Ue(l??0):l}else o=ze;return f("tkhd",+i,3,[n(r),n(r),u(s.track.id),u(0),n(t),Array(8).fill(0),m(0),m(0),ae(s.type==="audio"?1:0),m(0),Me(o),S(s.type==="video"?s.info.width:0),S(s.type==="video"?s.info.height:0)])},Le=(s,r)=>p("mdia",void 0,[Ye(s,r),Ze(s.type==="video"?"vide":"soun"),Je(s)]),Ye=(s,r)=>{let e=ue(s.samples),t=y(e?e.timestamp+e.duration:0,s.timescale),i=!O(r)||!O(t),n=i?V:u;return f("mdhd",+i,0,[n(r),n(r),u(s.timescale),n(t),m(21956),m(0)])},Ze=s=>f("hdlr",0,0,[x("mhlr"),x(s),u(0),u(0),u(0),x("mp4-muxer-hdlr",!0)]),Je=s=>p("minf",void 0,[s.type==="video"?et():tt(),rt(),nt(s)]),et=()=>f("vmhd",0,1,[m(0),m(0),m(0),m(0)]),tt=()=>f("smhd",0,0,[m(0),m(0)]),rt=()=>p("dinf",void 0,[it()]),it=()=>f("dref",0,0,[u(1)],[st()]),st=()=>f("url ",0,1),nt=s=>{let r=s.compositionTimeOffsetTable.length>1||s.compositionTimeOffsetTable.some(e=>e.sampleCompositionTimeOffset!==0);return p("stbl",void 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p("av1C",[e,0,0,0])},ct=(s,r)=>p(s,[Array(6).fill(0),m(1),m(0),m(0),u(0),m(r.info.numberOfChannels),m(16),m(0),m(0),S(r.info.sampleRate)],[Mt[r.track.source.codec](r)]),ht=s=>{let r=z(s.info.decoderConfig.description??new ArrayBuffer(0));return f("esds",0,0,[u(58753152),k(32+r.byteLength),m(1),k(0),u(75530368),k(18+r.byteLength),k(64),k(21),Ee(0),u(130071),u(130071),u(92307584),k(r.byteLength),...r,u(109084800),k(1),k(2)])},mt=s=>{let r=3840,e=0,t=s.info.decoderConfig?.description;if(t){if(t.byteLength<18)throw new TypeError("Invalid decoder description provided for Opus; must be at least 18 bytes long.");let i=ArrayBuffer.isView(t)?new DataView(t.buffer,t.byteOffset,t.byteLength):new DataView(t);r=i.getUint16(10,!0),e=i.getInt16(14,!0)}return p("dOps",[k(0),k(s.info.numberOfChannels),m(r),u(s.info.sampleRate),ae(e),k(0)])},ft=s=>f("stts",0,0,[u(s.timeToSampleTable.length),s.timeToSampleTable.map(r=>[u(r.sampleCount),u(r.sampleDelta)])]),pt=s=>{if(s.samples.every(e=>e.type==="key"))return null;let r=[...s.samples.entries()].filter(([,e])=>e.type==="key");return f("stss",0,0,[u(r.length),r.map(([e])=>u(e+1))])},bt=s=>f("stsc",0,0,[u(s.compactlyCodedChunkTable.length),s.compactlyCodedChunkTable.map(r=>[u(r.firstChunk),u(r.samplesPerChunk),u(1)])]),kt=s=>f("stsz",0,0,[u(0),u(s.samples.length),s.samples.map(r=>u(r.size))]),gt=s=>s.finalizedChunks.length>0&&U(s.finalizedChunks).offset>=2**32?f("co64",0,0,[u(s.finalizedChunks.length),s.finalizedChunks.map(r=>V(r.offset))]):f("stco",0,0,[u(s.finalizedChunks.length),s.finalizedChunks.map(r=>u(r.offset))]),Tt=s=>f("ctts",0,0,[u(s.compositionTimeOffsetTable.length),s.compositionTimeOffsetTable.map(r=>[u(r.sampleCount),u(r.sampleCompositionTimeOffset)])]),Ct=s=>p("mvex",void 0,s.map(xt)),xt=s=>f("trex",0,0,[u(s.track.id),u(1),u(0),u(0),u(0)]),le=(s,r)=>p("moof",void 0,[yt(s),...r.map(St)]),yt=s=>f("mfhd",0,0,[u(s)]),De=s=>{let r=0,e=0,t=0,i=0,n=s.type==="delta";return e|=+n,n?r|=1:r|=2,r<<24|e<<16|t<<8|i},St=s=>p("traf",void 0,[wt(s),At(s),Ot(s)]),wt=s=>{d(s.currentChunk);let r=0;r|=8,r|=16,r|=32,r|=131072;let e=s.currentChunk.samples[1]??s.currentChunk.samples[0],t={duration:e.timescaleUnitsToNextSample,size:e.size,flags:De(e)};return f("tfhd",0,r,[u(s.track.id),u(t.duration),u(t.size),u(t.flags)])},At=s=>(d(s.currentChunk),f("tfdt",1,0,[V(y(s.currentChunk.startTimestamp,s.timescale))])),Ot=s=>{d(s.currentChunk);let r=s.currentChunk.samples.map(T=>T.timescaleUnitsToNextSample),e=s.currentChunk.samples.map(T=>T.size),t=s.currentChunk.samples.map(De),i=s.currentChunk.samples.map(T=>y(T.timestamp-T.decodeTimestamp,s.timescale)),n=new Set(r),o=new Set(e),l=new Set(t),a=new Set(i),c=l.size===2&&t[0]!==t[1],b=n.size>1,g=o.size>1,C=!c&&l.size>1,_=a.size>1||[...a].some(T=>T!==0),A=0;return A|=1,A|=4*+c,A|=256*+b,A|=512*+g,A|=1024*+C,A|=2048*+_,f("trun",1,A,[u(s.currentChunk.samples.length),u(s.currentChunk.offset-s.currentChunk.moofOffset||0),c?u(t[0]):[],s.currentChunk.samples.map((T,E)=>[b?u(r[E]):[],g?u(e[E]):[],C?u(t[E]):[],_?Ge(i[E]):[]])])},Be=s=>p("mfra",void 0,[...s.map(vt),Vt()]),vt=(s,r)=>f("tfra",1,0,[u(s.track.id),u(63),u(s.finalizedChunks.length),s.finalizedChunks.map(t=>[V(y(t.startTimestamp,s.timescale)),V(t.moofOffset),u(r+1),u(1),u(1)])]),Vt=()=>f("mfro",0,0,[u(0)]),Et={avc:"avc1",hevc:"hvc1",vp8:"vp08",vp9:"vp09",av1:"av01"},Ut={avc:ut,hevc:lt,vp8:Ve,vp9:Ve,av1:dt},zt={aac:"mp4a",opus:"Opus"},Mt={aac:ht,opus:mt};var M=class{constructor(r){this.output=r}beforeTrackAdd(r){}onTrackClose(r){}};var X=1e3,Pt=2082844800,y=(s,r,e=!0)=>{let t=s*r;return e?Math.round(t):t},Y=class extends M{constructor(e,t){super(e);this.#i=new Uint8Array(8);this.#t=new DataView(this.#i.buffer);this.offsets=new WeakMap;this.#s=null;this.#o=null;this.#n=[];this.#a=Math.floor(Date.now()/1e3)+Pt;this.#l=[];this.#h=1;this.#e=e.writer,this.#r=t}#e;#r;#i;#t;#s;#o;#n;#a;#l;#h;writeU32(e){this.#t.setUint32(0,e,!1),this.#e.write(this.#i.subarray(0,4))}writeU64(e){this.#t.setUint32(0,Math.floor(e/2**32),!1),this.#t.setUint32(4,e,!1),this.#e.write(this.#i.subarray(0,8))}writeAscii(e){for(let t=0;t<e.length;t++)this.#t.setUint8(t%8,e.charCodeAt(t)),t%8===7&&this.#e.write(this.#i);e.length%8!==0&&this.#e.write(this.#i.subarray(0,e.length%8))}writeBox(e){if(this.offsets.set(e,this.#e.getPos()),e.contents&&!e.children)this.writeBoxHeader(e,e.size??e.contents.byteLength+8),this.#e.write(e.contents);else{let t=this.#e.getPos();if(this.writeBoxHeader(e,0),e.contents&&this.#e.write(e.contents),e.children)for(let o of e.children)o&&this.writeBox(o);let 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t=this.#d();this.#e.seek(this.#e.getPos()+t)}this.#o=L(!0),this.writeBox(this.#o)}this.#e.flush()}#d(){d(typeof this.#r.options.fastStart=="object");let e=0,t=[this.#r.options.fastStart.expectedVideoChunks,this.#r.options.fastStart.expectedAudioChunks];for(let i of t)i&&(e+=8*Math.ceil(2/3*i),e+=4*i,e+=12*Math.ceil(2/3*i),e+=4*i,e+=8*i);return e+=4096,e}#u(e,t){let i=this.#n.find(o=>o.track===e);if(i)return i;d(t),d(t.decoderConfig),d(t.decoderConfig.codedWidth!==void 0),d(t.decoderConfig.codedHeight!==void 0);let n={track:e,type:"video",info:{width:t.decoderConfig.codedWidth,height:t.decoderConfig.codedHeight,decoderConfig:t.decoderConfig},timescale:e.metadata.frameRate??57600,samples:[],sampleQueue:[],timestampProcessingQueue:[],firstTimestamp:null,lastKeyFrameTimestamp:null,timeToSampleTable:[],compositionTimeOffsetTable:[],lastTimescaleUnits:null,lastSample:null,finalizedChunks:[],currentChunk:null,compactlyCodedChunkTable:[]};return 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o=this.#f(n,t);this.#r.options.fastStart==="fragmented"?(n.sampleQueue.push(o),this.#b()):this.#p(n,o)}addEncodedAudioChunk(e,t,i){let n=this.#m(e,i);if(typeof this.#r.options.fastStart=="object"&&n.samples.length===this.#r.options.fastStart.expectedAudioChunks)throw new Error(`Cannot add more audio chunks than specified in 'fastStart' (${this.#r.options.fastStart.expectedAudioChunks}).`);let o=this.#f(n,t);this.#r.options.fastStart==="fragmented"?(n.sampleQueue.push(o),this.#b()):this.#p(n,o)}#f(e,t){let i=this.#x(e,t),n=(t.duration??0)/1e6,o=new Uint8Array(t.byteLength);return t.copyTo(o),{timestamp:i,decodeTimestamp:i,duration:n,data:o,size:o.byteLength,type:t.type,timescaleUnitsToNextSample:y(n,e.timescale)}}#c(e){if(e.timestampProcessingQueue.length===0)return;let t=e.timestampProcessingQueue.map(i=>i.timestamp).sort((i,n)=>i-n);for(let i=0;i<e.timestampProcessingQueue.length;i++){let n=e.timestampProcessingQueue[i];n.decodeTimestamp=t[i];let o=y(n.timestamp-n.decodeTimestamp,e.timescale);if(e.lastTimescaleUnits!==null){d(e.lastSample);let l=y(n.decodeTimestamp,e.timescale,!1),a=Math.round(l-e.lastTimescaleUnits);if(e.lastTimescaleUnits+=a,e.lastSample.timescaleUnitsToNextSample=a,this.#r.options.fastStart!=="fragmented"){let c=U(e.timeToSampleTable);d(c),c.sampleCount===1?(c.sampleDelta=a,c.sampleCount++):c.sampleDelta===a?c.sampleCount++:(c.sampleCount--,e.timeToSampleTable.push({sampleCount:2,sampleDelta:a}));let b=U(e.compositionTimeOffsetTable);d(b),b.sampleCompositionTimeOffset===o?b.sampleCount++:e.compositionTimeOffsetTable.push({sampleCount:1,sampleCompositionTimeOffset:o})}}else e.lastTimescaleUnits=0,this.#r.options.fastStart!=="fragmented"&&(e.timeToSampleTable.push({sampleCount:1,sampleDelta:y(n.duration,e.timescale)}),e.compositionTimeOffsetTable.push({sampleCount:1,sampleCompositionTimeOffset:o}));e.lastSample=n}e.timestampProcessingQueue.length=0}#p(e,t){t.type==="key"&&this.#c(e),this.#r.options.fastStart!=="fragmented"&&e.samples.push(t);let i=!1;if(!e.currentChunk)i=!0;else{let n=t.timestamp-e.currentChunk.startTimestamp;if(this.#r.options.fastStart==="fragmented"){let o=this.#n.every(l=>{if(e===l)return t.type==="key";let a=l.sampleQueue[0];return a&&a.type==="key"});n>=1&&o&&(i=!0,this.#T())}else i=n>=.5}i&&(e.currentChunk&&this.#g(e),e.currentChunk={startTimestamp:t.timestamp,samples:[],offset:null,moofOffset:null}),d(e.currentChunk),e.currentChunk.samples.push(t),e.timestampProcessingQueue.push(t)}#x(e,t){let i=t.timestamp/1e6;if(i<0)throw new Error(`Timestamps must be non-negative (got 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${i}
${t}`;He.lastIndex=0,C=C.replace(He,E=>{let $e=this.#s(E.slice(1,-1))-c;return`<${this.#o($e)}>`}),r=r.slice(a).trimStart(),Q.lastIndex=0;let A={body:fe.encode(C),additions:_.trim()===""?null:fe.encode(_),timestamp:c*1e3,duration:g*1e3},T={};this.#t||(T.decoderConfig={description:this.#i},this.#t=!0),this.#e.output(A,T)}}#s(r){let e=It.exec(r);if(!e)throw new Error("Expected match.");return 60*60*1e3*Number(e[1]||"0")+60*1e3*Number(e[2])+1e3*Number(e[3])+Number(e[4])}#o(r){let e=Math.floor(r/36e5),t=Math.floor(r%(60*60*1e3)/(60*1e3)),i=Math.floor(r%(60*1e3)/1e3),n=r%1e3;return e.toString().padStart(2,"0")+":"+t.toString().padStart(2,"0")+":"+i.toString().padStart(2,"0")+"."+n.toString().padStart(3,"0")}};var H=class{constructor(){this.connectedTrack=null;this.closed=!1}ensureValidDigest(){if(!this.connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this.connectedTrack.output.started)throw new Error("Cannot call digest before output has been started.");if(this.connectedTrack.output.finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this.closed)throw new Error("Cannot call digest after source has been closed.")}start(){}async flush(){}close(){if(this.closed)throw new Error("Source already closed.");if(!this.connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this.connectedTrack.output.started)throw new Error("Cannot call close before output has been started.");this.closed=!0,!this.connectedTrack.output.finalizing&&this.connectedTrack.output.muxer.onTrackClose(this.connectedTrack)}},D=class extends H{constructor(e){super();this.connectedTrack=null;this.codec=e}},pe=class extends D{constructor(r){super(r)}digest(r,e){this.ensureValidDigest(),this.connectedTrack?.output.muxer.addEncodedVideoChunk(this.connectedTrack,r,e)}},_t=5,$=class{constructor(r,e){this.source=r;this.codecConfig=e;this.encoder=null;this.lastMultipleOfKeyFrameInterval=-1}digest(r){this.source.ensureValidDigest(),this.ensureEncoder(r),d(this.encoder);let e=Math.floor(r.timestamp/1e6/_t);this.encoder.encode(r,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e}ensureEncoder(r){this.encoder||(this.encoder=new VideoEncoder({output:(e,t)=>this.source.connectedTrack?.output.muxer.addEncodedVideoChunk(this.source.connectedTrack,e,t),error:e=>console.error(e)}),this.encoder.configure({codec:Re(this.codecConfig.codec,r.codedWidth,r.codedHeight),width:r.codedWidth,height:r.codedHeight,bitrate:this.codecConfig.bitrate}))}async flush(){return this.encoder?.flush()}},be=class extends D{constructor(r){super(r.codec),this.encoder=new $(this,r)}digest(r){this.encoder.digest(r)}flush(){return this.encoder.flush()}},ke=class extends D{constructor(e,t){super(t.codec);this.canvas=e;this.encoder=new $(this,t)}digest(e,t=0){let i=new VideoFrame(this.canvas,{timestamp:Math.round(1e6*e),duration:Math.round(1e6*t)});this.encoder.digest(i),i.close()}flush(){return this.encoder.flush()}},ge=class extends D{constructor(e,t){super(t.codec);this.track=e;this.abortController=null;this.encoder=new $(this,t)}start(){this.abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this.track}),t=new WritableStream({write:i=>{this.encoder.digest(i),i.close()}});e.readable.pipeTo(t,{signal:this.abortController.signal}).catch(i=>{i instanceof DOMException&&i.name==="AbortError"||console.error("Pipe error:",i)})}async flush(){this.abortController&&(this.abortController.abort(),this.abortController=null),await this.encoder.flush()}},B=class extends H{constructor(e){super();this.connectedTrack=null;this.codec=e}},Te=class extends B{constructor(r){super(r)}digest(r,e){this.ensureValidDigest(),this.connectedTrack?.output.muxer.addEncodedAudioChunk(this.connectedTrack,r,e)}},K=class{constructor(r,e){this.source=r;this.codecConfig=e;this.encoder=null}digest(r){this.source.ensureValidDigest(),this.ensureEncoder(r),d(this.encoder),this.encoder.encode(r)}ensureEncoder(r){this.encoder||(this.encoder=new AudioEncoder({output:(e,t)=>this.source.connectedTrack?.output.muxer.addEncodedAudioChunk(this.source.connectedTrack,e,t),error:e=>console.error(e)}),this.encoder.configure({codec:Qe(this.codecConfig.codec,r.numberOfChannels,r.sampleRate),numberOfChannels:r.numberOfChannels,sampleRate:r.sampleRate,bitrate:this.codecConfig.bitrate}))}async flush(){return this.encoder?.flush()}},Ce=class extends B{constructor(r){super(r.codec),this.encoder=new K(this,r)}digest(r){this.encoder.digest(r)}flush(){return this.encoder.flush()}},xe=class extends B{constructor(e){super(e.codec);this.accumulatedFrameCount=0;this.encoder=new K(this,e)}digest(e){let t=e.numberOfChannels,i=e.sampleRate,n=e.length,o=new Float32Array(t*n);for(let a=0;a<t;a++){let c=e.getChannelData(a);o.set(c,a*n)}let l=new AudioData({format:"f32-planar",sampleRate:i,numberOfFrames:n,numberOfChannels:t,timestamp:Math.round(1e6*this.accumulatedFrameCount/i),data:o});this.encoder.digest(l),l.close(),this.accumulatedFrameCount+=n}flush(){return this.encoder.flush()}},ye=class extends B{constructor(e,t){super(t.codec);this.track=e;this.abortController=null;this.encoder=new K(this,t)}start(){this.abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this.track}),t=new WritableStream({write:i=>{this.encoder.digest(i),i.close()}});e.readable.pipeTo(t,{signal:this.abortController.signal}).catch(i=>{i instanceof DOMException&&i.name==="AbortError"||console.error("Pipe error:",i)})}async flush(){this.abortController&&(this.abortController.abort(),this.abortController=null),await this.encoder.flush()}},Se=class extends H{constructor(e){super();this.connectedTrack=null;this.codec=e}},we=class extends Se{constructor(r){super(r),this.encoder=new te({output:(e,t)=>this.connectedTrack?.output.muxer.addEncodedSubtitleChunk(this.connectedTrack,e,t),error:e=>console.error(e)}),this.encoder.configure({codec:r})}digest(r){this.ensureValidDigest(),this.encoder.encode(r)}};var G=class{},re=class extends G{#e=0;#r;#i=new ArrayBuffer(2**16);#t=new Uint8Array(this.#i);#s=0;constructor(r){super(),this.#r=r}#o(r){let e=this.#i.byteLength;for(;e<r;)e*=2;if(e===this.#i.byteLength)return;let t=new ArrayBuffer(e),i=new Uint8Array(t);i.set(this.#t,0),this.#i=t,this.#t=i}write(r){this.#o(this.#e+r.byteLength),this.#t.set(r,this.#e),this.#e+=r.byteLength,this.#s=Math.max(this.#s,this.#e)}seek(r){this.#e=r}getPos(){return this.#e}flush(){}finalize(){this.#o(this.#e),this.#r.buffer=this.#i.slice(0,Math.max(this.#s,this.#e))}},ie=class extends G{#e=0;#r;#i=[];constructor(r){super(),this.#r=r}write(r){this.#i.push({data:r.slice(),start:this.#e}),this.#e+=r.byteLength}seek(r){this.#e=r}getPos(){return this.#e}flush(){if(this.#i.length===0)return;let r=[],e=[...this.#i].sort((t,i)=>t.start-i.start);r.push({start:e[0].start,size:e[0].data.byteLength});for(let t=1;t<e.length;t++){let i=r[r.length-1],n=e[t];n.start<=i.start+i.size?i.size=Math.max(i.size,n.start+n.data.byteLength-i.start):r.push({start:n.start,size:n.data.byteLength})}for(let t of r){t.data=new Uint8Array(t.size);for(let i of this.#i)t.start<=i.start&&i.start<t.start+t.size&&t.data.set(i.data,i.start-t.start);this.#r.options.onData?.(t.data,t.start)}this.#i.length=0}finalize(){}},Wt=2**24,Nt=2,j=class extends G{#e=0;#r;#i;#t=[];constructor(r){if(super(),this.#r=r,this.#i=r.options?.chunkSize??Wt,!Number.isInteger(this.#i)||this.#i<2**10)throw new Error("Invalid StreamTarget options: chunkSize must be an integer not smaller than 1024.")}write(r){this.#s(r,this.#e),this.#a(),this.#e+=r.byteLength}seek(r){this.#e=r}getPos(){return this.#e}#s(r,e){let t=this.#t.findIndex(a=>a.start<=e&&e<a.start+this.#i);t===-1&&(t=this.#n(e));let i=this.#t[t],n=e-i.start,o=r.subarray(0,Math.min(this.#i-n,r.byteLength));i.data.set(o,n);let l={start:n,end:n+o.byteLength};if(this.#o(i,l),i.written[0].start===0&&i.written[0].end===this.#i&&(i.shouldFlush=!0),this.#t.length>Nt){for(let a=0;a<this.#t.length-1;a++)this.#t[a].shouldFlush=!0;this.#a()}o.byteLength<r.byteLength&&this.#s(r.subarray(o.byteLength),e+o.byteLength)}#o(r,e){let t=0,i=r.written.length-1,n=-1;for(;t<=i;){let o=Math.floor(t+(i-t+1)/2);r.written[o].start<=e.start?(t=o+1,n=o):i=o-1}for(r.written.splice(n+1,0,e),(n===-1||r.written[n].end<e.start)&&n++;n<r.written.length-1&&r.written[n].end>=r.written[n+1].start;)r.written[n].end=Math.max(r.written[n].end,r.written[n+1].end),r.written.splice(n+1,1)}#n(r){let t={start:Math.floor(r/this.#i)*this.#i,data:new Uint8Array(this.#i),written:[],shouldFlush:!1};return this.#t.push(t),this.#t.sort((i,n)=>i.start-n.start),this.#t.indexOf(t)}#a(r=!1){for(let e=0;e<this.#t.length;e++){let t=this.#t[e];if(!(!t.shouldFlush&&!r)){for(let i of t.written)this.#r.options.onData?.(t.data.subarray(i.start,i.end),t.start+i.start);this.#t.splice(e--,1)}}}flush(){}finalize(){this.#a(!0)}},se=class extends j{constructor(r){super(new q({onData:(e,t)=>r.stream.write({type:"write",data:e,position:t}),chunkSize:r.options?.chunkSize}))}};var I=class{constructor(){this.output=null}},Ae=class extends I{constructor(){super(...arguments);this.buffer=null}createWriter(){return new re(this)}},q=class extends I{constructor(e){super();this.options=e;if(typeof e!="object")throw new TypeError("StreamTarget requires an options object to be passed to its constructor.");if(e.onData){if(typeof e.onData!="function")throw new TypeError("options.onData, when provided, must be a function.");if(e.onData.length<2)throw new TypeError("options.onData, when provided, must be a function that takes in at least two arguments (data and position). Ignoring the position argument, which specifies the byte offset at which the data is to be written, can lead to broken outputs.")}if(e.chunked!==void 0&&typeof e.chunked!="boolean")throw new TypeError("options.chunked, when provided, must be a boolean.");if(e.chunkSize!==void 0&&(!Number.isInteger(e.chunkSize)||e.chunkSize<=0))throw new TypeError("options.chunkSize, when provided, must be a positive integer.")}createWriter(){return this.options.chunked?new j(this):new ie(this)}},Oe=class extends I{constructor(e,t){super();this.stream=e;this.options=t;if(!(e instanceof FileSystemWritableFileStream))throw new TypeError("FileSystemWritableFileStreamTarget requires a FileSystemWritableFileStream instance.");if(t!==void 0&&typeof t!="object")throw new TypeError("FileSystemWritableFileStreamTarget's options, when provided, must be an object.");if(t&&t.chunkSize!==void 0&&(!Number.isInteger(t.chunkSize)||t.chunkSize<=0))throw new TypeError("options.chunkSize, when provided, must be a positive integer")}createWriter(){return new se(this)}};export{Ae as ArrayBufferTarget,xe as AudioBufferSource,Ce as AudioDataSource,ke as CanvasSource,Te as EncodedAudioChunkSource,pe as EncodedVideoChunkSource,Oe as FileSystemWritableFileStreamTarget,ye as MediaStreamAudioTrackSource,ge as MediaStreamVideoTrackSource,ee as MkvOutputFormat,me as Mp4OutputFormat,ne as Output,q as StreamTarget,I as Target,we as TextSubtitleSource,be as VideoFrameSource,F as WebMOutputFormat};