swarmcloud-hls
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Let your viewers become your unlimitedly scalable CDN.
1 lines • 731 kB
JavaScript
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a=this.elementaryStreams,o=a[e];o?(o.startPTS=Math.min(o.startPTS,t),o.endPTS=Math.max(o.endPTS,i),o.startDTS=Math.min(o.startDTS,r),o.endDTS=Math.max(o.endDTS,s)):a[e]={startPTS:t,endPTS:i,startDTS:r,endDTS:s,partial:n}},r(t,[{key:"byteLength",get:function(){if(this.hasStats){var e=this.stats.total;if(e)return e}if(this.byteRange){var t=this.byteRange[0],i=this.byteRange[1];if(T(t)&&T(i))return i-t}return null}},{key:"bitrate",get:function(){return this.byteLength?8*this.byteLength/this.duration:this._bitrate?this._bitrate:null},set:function(e){this._bitrate=e}},{key:"decryptdata",get:function(){if(!this.levelkeys&&!this._decryptdata)return null;if(!this._decryptdata&&this.levelkeys&&!this.levelkeys.NONE){var e=this.levelkeys.identity;if(e)this._decryptdata=e.getDecryptData(this.sn);else{var t=Object.keys(this.levelkeys);if(1===t.length)return this._decryptdata=this.levelkeys[t[0]].getDecryptData(this.sn)}}return this._decryptdata}},{key:"end",get:function(){return 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a;(a=e.call(this,r)||this).fragOffset=0,a.duration=0,a.gap=!1,a.independent=!1,a.relurl=void 0,a.fragment=void 0,a.index=void 0,a.duration=t.decimalFloatingPoint("DURATION"),a.gap=t.bool("GAP"),a.independent=t.bool("INDEPENDENT"),a.relurl=t.enumeratedString("URI"),a.fragment=i,a.index=s;var o=t.enumeratedString("BYTERANGE");return o&&a.setByteRange(o,n),n&&(a.fragOffset=n.fragOffset+n.duration),a}return o(t,e),r(t,[{key:"start",get:function(){return this.fragment.start+this.fragOffset}},{key:"end",get:function(){return this.start+this.duration}},{key:"loaded",get:function(){var e=this.elementaryStreams;return!!(e.audio||e.video||e.audiovideo)}}])}(J);function ie(e,t){var i=Object.getPrototypeOf(e);if(i)return Object.getOwnPropertyDescriptor(i,t)||ie(i,t)}var re=Math.pow(2,32)-1,se=[].push,ne={video:1,audio:2,id3:3,text:4};function ae(e){return String.fromCharCode.apply(null,e)}function oe(e,t){var i=e[t]<<8|e[t+1];return i<0?65536+i:i}function le(e,t){var i=ue(e,t);return 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i=e.split(","),r=t.split(",");return i.length===r.length&&!i.some((function(e){return-1===r.indexOf(e)}))}(e.characteristics||"",t.characteristics))&&(void 0===i||i(e,t))}function nt(e,t){var i=e.audioCodec,r=e.channels;return!(void 0!==i&&(t.audioCodec||"").substring(0,4)!==i.substring(0,4)||void 0!==r&&r!==(t.channels||"2"))}function at(e,t,i){for(var r=t;r>-1;r--)if(i(e[r]))return r;for(var s=t+1;s<e.length;s++)if(i(e[s]))return s;return-1}function ot(e,t){var i;return!!e&&e!==(null==(i=t.loadLevelObj)?void 0:i.uri)}var lt=function(e){function t(t){var i;return(i=e.call(this,"abr",t.logger)||this).hls=void 0,i.lastLevelLoadSec=0,i.lastLoadedFragLevel=-1,i.firstSelection=-1,i._nextAutoLevel=-1,i.nextAutoLevelKey="",i.audioTracksByGroup=null,i.codecTiers=null,i.timer=-1,i.fragCurrent=null,i.partCurrent=null,i.bitrateTestDelay=0,i.rebufferNotice=-1,i.bwEstimator=void 0,i._abandonRulesCheck=function(e){var t,r=i,s=r.fragCurrent,n=r.partCurrent,a=r.hls,o=a.autoLevelEnabled,l=a.media;if(s&&l){var h=performance.now(),u=n?n.stats:s.stats,d=n?n.duration:s.duration,c=h-u.loading.start,f=a.minAutoLevel,g=s.level,p=i._nextAutoLevel;if(u.aborted||u.loaded&&u.loaded===u.total||g<=f)return i.clearTimer(),void(i._nextAutoLevel=-1);if(o){var m=p>-1&&p!==g,v=!!e||m;if(v||!l.paused&&l.playbackRate&&l.readyState){var y=a.mainForwardBufferInfo;if(v||null!==y){var E=i.bwEstimator.getEstimateTTFB(),S=Math.abs(l.playbackRate);if(!(c<=Math.max(E,d/(2*S)*1e3))){var L=y?y.len/S:0,_=u.loading.first?u.loading.first-u.loading.start:-1,b=u.loaded&&_>-1,A=i.getBwEstimate(),R=a.levels,P=R[g],k=Math.max(u.loaded,Math.round(d*(s.bitrate||P.averageBitrate)/8)),D=b?c-_:c;D<1&&b&&(D=Math.min(c,8*u.loaded/A));var w=b?1e3*u.loaded/D:0,C=E/1e3,M=w?(k-u.loaded)/w:8*k/A+C;if(!(M<=L)){var O,x=w?8*w:A,F=!0===(null==(t=(null==e?void 0:e.details)||i.hls.latestLevelDetails)?void 0:t.live),N=i.hls.config.abrBandWidthUpFactor,B=Number.POSITIVE_INFINITY;for(O=g-1;O>f;O--){var U=R[O].maxBitrate,G=!R[O].details||F;if((B=i.getTimeToLoadFrag(C,x,d*U,G))<Math.min(L,d+C))break}if(!(B>=M||B>10*d)){b?i.bwEstimator.sample(c-Math.min(E,_),u.loaded):i.bwEstimator.sampleTTFB(c);var H=R[O].maxBitrate;i.getBwEstimate()*N>H&&i.resetEstimator(H);var K=i.findBestLevel(H,f,O,0,L,1,1);K>-1&&(O=K),i.warn("Fragment "+s.sn+(n?" part "+n.index:"")+" of level "+g+" is loading too slowly;\n Fragment duration: "+s.duration.toFixed(3)+"\n Time to underbuffer: "+L.toFixed(3)+" s\n Estimated load time for current fragment: "+M.toFixed(3)+" s\n Estimated load time for down switch fragment: "+B.toFixed(3)+" s\n TTFB estimate: "+(0|_)+" ms\n Current BW estimate: "+(T(A)?0|A:"Unknown")+" bps\n New BW estimate: "+(0|i.getBwEstimate())+" bps\n Switching to level "+O+" @ "+(0|H)+" bps"),a.nextLoadLevel=a.nextAutoLevel=O,i.clearTimer();var V=function(){if(i.clearTimer(),i.fragCurrent===s&&i.hls.loadLevel===O&&O>0){var e=i.getStarvationDelay();if(i.warn("Aborting inflight request "+(O>0?"and switching down":"")+"\n Fragment duration: "+s.duration.toFixed(3)+" s\n Time to underbuffer: "+e.toFixed(3)+" s"),s.abortRequests(),i.fragCurrent=i.partCurrent=null,O>f){var t=i.findBestLevel(i.hls.levels[f].bitrate,f,O,0,e,1,1);-1===t&&(t=f),i.hls.nextLoadLevel=i.hls.nextAutoLevel=t,i.resetEstimator(i.hls.levels[t].bitrate)}}};m||M>2*B?V():i.timer=self.setInterval(V,1e3*B),a.trigger(I.FRAG_LOAD_EMERGENCY_ABORTED,{frag:s,part:n,stats:u})}}}}}}}},i.hls=t,i.bwEstimator=i.initEs