hls.js
Version:
JavaScript HLS client using MediaSourceExtension
1 lines • 543 kB
JavaScript
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t,n,a,s,o=(n="",a=(t=e).audio,(s=t.video)&&(n+=je(s.contentType)+"_r"+s.height+"x"+s.width+"f"+Math.ceil(s.framerate)+(s.transferFunction||"sd")+"_"+Math.ceil(s.bitrate/1e5)),a&&(n+=(s?"_":"")+je(a.contentType)+"_c"+a.channels),n);return i[o]||(i[o]=r.decodingInfo(e))}))).then((function(e){return{supported:!e.some((function(e){return!e.supported})),configurations:a,decodingInfoResults:e}})).catch((function(e){return{supported:!1,configurations:a,decodingInfoResults:[],error:e}}))}function $e(e,t){if(t<=1)return 1;var r=128e3;return"ec-3"===e?r=768e3:"ac-3"===e&&(r=64e4),Math.min(t/2,r)}function Ze(e){return 1e3*Math.ceil(Math.max(.9*e.bitrate,e.averageBitrate)/1e3)||1}var Je=["NONE","TYPE-0","TYPE-1",null],et=["SDR","PQ","HLG"],tt="",rt="YES",it="v2";function nt(e){var t=e.canSkipUntil,r=e.canSkipDateRanges,i=e.age;return t&&i<t/2?r?it:rt:tt}var at=function(){function e(e,t,r){this.msn=void 0,this.part=void 0,this.skip=void 0,this.msn=e,this.part=t,this.skip=r}return e.prototype.addDirectives=function(e){var t=new self.URL(e);return void 0!==this.msn&&t.searchParams.set("_HLS_msn",this.msn.toString()),void 0!==this.part&&t.searchParams.set("_HLS_part",this.part.toString()),this.skip&&t.searchParams.set("_HLS_skip",this.skip),t.href},e}(),st=function(){function e(e){if(this._attrs=void 0,this.audioCodec=void 0,this.bitrate=void 0,this.codecSet=void 0,this.url=void 0,this.frameRate=void 0,this.height=void 0,this.id=void 0,this.name=void 0,this.supplemental=void 0,this.videoCodec=void 0,this.width=void 0,this.details=void 0,this.fragmentError=0,this.loadError=0,this.loaded=void 0,this.realBitrate=0,this.supportedPromise=void 0,this.supportedResult=void 0,this._avgBitrate=0,this._audioGroups=void 0,this._subtitleGroups=void 0,this._urlId=0,this.url=[e.url],this._attrs=[e.attrs],this.bitrate=e.bitrate,e.details&&(this.details=e.details),this.id=e.id||0,this.name=e.name,this.width=e.width||0,this.height=e.height||0,this.frameRate=e.attrs.optionalFloat("FRAME-RATE",0),this._avgBitrate=e.attrs.decimalInteger("AVERAGE-BANDWIDTH"),this.audioCodec=e.audioCodec,this.videoCodec=e.videoCodec,this.codecSet=[e.videoCodec,e.audioCodec].filter((function(e){return!!e})).map((function(e){return e.substring(0,4)})).join(","),"supplemental"in e){var t;this.supplemental=e.supplemental;var r=null==(t=e.supplemental)?void 0:t.videoCodec;r&&r!==e.videoCodec&&(this.codecSet+=","+r.substring(0,4))}this.addGroupId("audio",e.attrs.AUDIO),this.addGroupId("text",e.attrs.SUBTITLES)}var t=e.prototype;return t.hasAudioGroup=function(e){return ot(this._audioGroups,e)},t.hasSubtitleGroup=function(e){return ot(this._subtitleGroups,e)},t.addGroupId=function(e,t){if(t)if("audio"===e){var r=this._audioGroups;r||(r=this._audioGroups=[]),-1===r.indexOf(t)&&r.push(t)}else if("text"===e){var i=this._subtitleGroups;i||(i=this._subtitleGroups=[]),-1===i.indexOf(t)&&i.push(t)}},t.addFallback=function(){},i(e,[{key:"maxBitrate",get:function(){return Math.max(this.realBitrate,this.bitrate)}},{key:"averageBitrate",get:function(){return this._avgBitrate||this.realBitrate||this.bitrate}},{key:"attrs",get:function(){return this._attrs[0]}},{key:"codecs",get:function(){return this.attrs.CODECS||""}},{key:"pathwayId",get:function(){return this.attrs["PATHWAY-ID"]||"."}},{key:"videoRange",get:function(){return this.attrs["VIDEO-RANGE"]||"SDR"}},{key:"score",get:function(){return this.attrs.optionalFloat("SCORE",0)}},{key:"uri",get:function(){return this.url[0]||""}},{key:"audioGroups",get:function(){return this._audioGroups}},{key:"subtitleGroups",get:function(){return this._subtitleGroups}},{key:"urlId",get:function(){return 0},set:function(e){}},{key:"audioGroupIds",get:function(){return this.audioGroups?[this.audioGroupId]:void 0}},{key:"textGroupIds",get:function(){return this.subtitleGroups?[this.textGroupId]:void 0}},{key:"audioGroupId",get:function(){var e;return null==(e=this.audioGroups)?void 0:e[0]}},{key:"textGroupId",get:function(){var e;return null==(e=this.subtitleGroups)?void 0:e[0]}}])}();function ot(e,t){return!(!t||!e)&&-1!==e.indexOf(t)}function lt(e,t){var r=!1,i=[];if(e&&(r="SDR"!==e,i=[e]),t){var n="SDR"!==(i=t.allowedVideoRanges||et.slice(0)).join("")&&!t.videoCodec;(r=void 0!==t.preferHDR?t.preferHDR:n&&function(){if("function"==typeof matchMedia){var e=matchMedia("(dynamic-range: high)"),t=matchMedia("bad query");if(e.media!==t.media)return!0===e.matches}return!1}())||(i=["SDR"])}return{preferHDR:r,allowedVideoRanges:i}}var ut=function(e,t){return JSON.stringify(e,function(e){var t=new WeakSet;return function(r,i){if(e&&(i=e(r,i)),"object"==typeof 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0===a||t.groupId===a)&&(void 0===s||t.name===s)&&(void 0===o||(i=o,void 0===(n=t.lang)&&(n="--"),i.length===n.length?i===n:i.startsWith(n)||n.startsWith(i)))&&(void 0===o||t.assocLang===l)&&(void 0===u||t.default===u)&&(void 0===d||t.forced===d)&&(!("characteristics"in e)||function(e,t){void 0===t&&(t="");var r=e.split(","),i=t.split(",");return r.length===i.length&&!r.some((function(e){return-1===i.indexOf(e)}))}(e.characteristics||"",t.characteristics))&&(void 0===r||r(e,t))}function vt(e,t){var r=e.audioCodec,i=e.channels;return!(void 0!==r&&(t.audioCodec||"").substring(0,4)!==r.substring(0,4)||void 0!==i&&i!==(t.channels||"2"))}function mt(e,t,r){for(var i=t;i>-1;i--)if(r(e[i]))return i;for(var n=t+1;n<e.length;n++)if(r(e[n]))return n;return-1}function pt(e,t){var r;return!!e&&e!==(null==(r=t.loadLevelObj)?void 0:r.uri)}var yt=function(e){function t(t){var r;return(r=e.call(this,"abr",t.logger)||this).hls=void 0,r.lastLevelLoadSec=0,r.lastLoadedFragLevel=-1,r.firstSelection=-1,r._nextAutoLevel=-1,r.nextAutoLevelKey="",r.audioTracksByGroup=null,r.codecTiers=null,r.timer=-1,r.fragCurrent=null,r.partCurrent=null,r.bitrateTestDelay=0,r.rebufferNotice=-1,r.supportedCache={},r.bwEstimator=void 0,r._abandonRulesCheck=function(e){var t,i=r,n=i.fragCurrent,a=i.partCurrent,s=i.hls,o=s.autoLevelEnabled,l=s.media;if(n&&l){var u=performance.now(),d=a?a.stats:n.stats,h=a?a.duration:n.duration,f=u-d.loading.start,c=s.minAutoLevel,g=n.level,v=r._nextAutoLevel;if(d.aborted||d.loaded&&d.loaded===d.total||g<=c)return r.clearTimer(),void(r._nextAutoLevel=-1);if(o){var m=v>-1&&v!==g,p=!!e||m;if(p||!l.paused&&l.playbackRate&&l.readyState){var y=s.mainForwardBufferInfo;if(p||null!==y){var E=r.bwEstimator.getEstimateTTFB(),T=Math.abs(l.playbackRate);if(!(f<=Math.max(E,h/(2*T)*1e3))){var S=y?y.len/T:0,L=d.loading.first?d.loading.first-d.loading.start:-1,I=d.loaded&&L>-1,R=r.getBwEstimate(),k=s.levels,D=k[g],_=Math.max(d.loaded,Math.round(h*(n.bitrate||D.averageBitrate)/8)),P=I?f-L:f;P<1&&I&&(P=Math.min(f,8*d.loaded/R));var C=I?1e3*d.loaded/P:0,w=E/1e3,O=C?(_-d.loaded)/C:8*_/R+w;if(!(O<=S)){var x,M=C?8*C:R,F=!0===(null==(t=(null==e?void 0:e.details)||r.hls.latestLevelDetails)?void 0:t.live),N=r.hls.config.abrBandWidthUpFactor,U=Number.POSITIVE_INFINITY;for(x=g-1;x>c;x--){var B=k[x].maxBitrate,G=!k[x].details||F;if((U=r.getTimeToLoadFrag(w,M,h*B,G))<Math.min(S,h+w))break}if(!(U>=O||U>10*h)){I?r.bwEstimator.sample(f-Math.min(E,L),d.loaded):r.bwEstimator.sampleTTFB(f);var K=k[x].maxBitrate;r.getBwEstimate()*N>K&&r.resetEstimator(K);var V=r.findBestLevel(K,c,x,0,S,1,1);V>-1&&(x=V),r.warn("Fragment "+n.sn+(a?" part "+a.index:"")+" of level "+g+" is loading too slowly;\n Fragment duration: "+n.duration.toFixed(3)+"\n Time to underbuffer: "+S.toFixed(3)+" s\n Estimated load time for current fragment: "+O.toFixed(3)+" s\n Estimated load time for down switch fragment: "+U.toFixed(3)+" s\n TTFB estimate: "+(0|L)+" ms\n Current BW estimate: "+(A(R)?0|R:"Unknown")+" bps\n New BW estimate: "+(0|r.getBwEstimate())+" bps\n Switching to level "+x+" @ "+(0|K)+" bps"),s.nextLoadLevel=s.nextAutoLevel=x,r.clearTimer();var H=function(){if(r.clearTimer(),r.fragCurrent===n&&r.hls.loadLevel===x&&x>0){var e=r.getStarvationDelay();if(r.warn("Aborting inflight request "+(x>0?"and switching down":"")+"\n Fragment duration: "+n.duration.toFixed(3)+" s\n Time to underbuffer: "+e.toFixed(3)+" s"),n.abortRequests(),r.fragCurrent=r.partCurrent=null,x>c){var t=r.findBestLevel(r.hls.levels[c].bitrate,c,x,0,e,1,1);-1===t&&(t=c),r.hls.nextLoadLevel=r.hls.nextAutoLevel=t,r.resetEstimator(r.hls.levels[t].bitrate)}}};m||O>2*U?H():r.timer=self.setInterval(H,1e3*U),s.trigger(b.FRAG_LOAD_EMERGENCY_ABORTED,{frag:n,part:a,stats:d})}}}}}}}},r.hls=t,r.bwEstimator=r.initEstimator(),r.registerListeners(),r}o(t,e);var r=t.prototype;return r.resetEstimator=function(e){e&&(this.log("setting initial bwe to "+e),this.hls.config.abrEwmaDefaultEstimate=e),this.firstSelection=-1,this.bwEstimator=this.initEstimator()},r.initEstimator=function(){var e=this.hls.config;return new F(e.abrEwmaSlowVoD,e.abrEwmaFastVoD,e.abrEwmaDefaultEstimate)},r.registerListeners=function(){var e=this.hls;e.on(b.MANIFEST_LOADING,this.onManifestLoading,this),e.on(b.FRAG_LOADING,this.onFragLoading,this),e.on(b.FRAG_LOADED,this.onFragLoaded,this),e.on(b.FRAG_BUFFERED,this.onFragBuffered,this),e.on(b.LEVEL_SWITCHING,this.onLevelSwitching,this),e.on(b.LEVEL_LOADED,this.onLevelLoaded,this),e.on(b.LEVELS_UPDATED,this.onLevelsUpdated,this),e.on(b.MAX_AUTO_LEVEL_UPDATED,this.onMaxAutoLevelUpdated,this),e.on(b.ERROR,this.onError,this)},r.unregisterListeners=function(){var e=this.hls;e&&(e.off(b.MANIFEST_LOADING,this.onManifestLoading,this),e.off(b.FRAG_LOADING,this.onFragLoading,this),e.off(b.FRAG_LOADED,this.onFragLoaded,this),e.off(b.FRAG_BUFFERED,this.onFragBuffered,this),e.off(b.LEVEL_SWITCHING,this.onLevelSwitching,this),e.off(b.LEVEL_LOADED,this.onLevelLoaded,this),e.off(b.LEVELS_UPDATED,this.onLevelsUpdated,this),e.off(b.MAX_AUTO_LEVEL_UPDATED,this.onMaxAutoLevelUpdated,this),e.off(b.ERROR,this.onError,this))},r.destroy=function(){this.unregisterListeners(),this.clearTimer(),this.hls=this._abandonRulesCheck=this.supportedCache=null,this.fragCurrent=this.partCurrent=null},r.onManifestLoading=function(e,t){this.lastLoadedFragLevel=-1,this.firstSelection=-1,this.lastLevelLoadSec=0,this.supportedCache={},this.fragCurrent=this.partCurrent=null,this.onLevelsUpdated(),this.clearTimer()},r.onLevelsUpdated=function(){this.lastLoadedFragLevel>-1&&this.fragCurrent&&(this.lastLoadedFragLevel=this.fragCurrent.level),this._nextAutoLevel=-1,this.onMaxAutoLevelUpdated(),this.codecTiers=null,this.audioTracksByGroup=null},r.onMaxAutoLevelUpdated=function(){this.firstSelection=-1,this.nextAutoLevelKey=""},r.onFragLoading=function(e,t){var r,i=t.frag;this.ignoreFragment(i)||(i.bitrateTest||(this.fragCurrent=i,this.partCurrent=null!=(r=t.part)?r:null),this.clearTimer(),this.timer=self.setInterval(this._abandonRulesCheck,100))},r.onLevelSwitching=function(e,t){this.clearTimer()},r.onError=function(e,t){if(!t.fatal)switch(t.details){case k.BUFFER_ADD_CODEC_ERROR:case k.BUFFER_APPEND_ERROR:this.lastLoadedFragLevel=-1,this.firstSelection=-1;break;case k.FRAG_LOAD_TIMEOUT:var r=t.frag,i=this.fragCurrent,n=this.partCurrent;if(r&&i&&r.sn===i.sn&&r.level===i.level){var a=performance.now(),s=n?n.stats:r.stats,o=a-s.loading.start,l=s.loading.first?s.loading.first-s.loading.start:-1;if(s.loaded&&l>-1){var u=this.bwEstimator.getEstimateTTFB();this.bwEstimator.sample(o-Math.min(u,l),s.loaded)}else this.bwEstimator.sampleTTFB(o)}}},r.getTimeToLoadFrag=function(e,t,r,i){return e+r/t+(i?e+this.lastLevelLoadSec:0)},r.onLevelLoaded=function(e,t){var r=this.hls.config,i=t.stats.loading,n=i.end-i.first;A(n)&&(this.lastLevelLoadSec=n/1e3),t.details.live?this.bwEstimator.update(r.abrEwmaSlowLive,r.abrEwmaFastLive):this.bwEstimator.update(r.abrEwmaSlowVoD,r.abrEwmaFastVoD),this.timer>-1&&this._abandonRulesCheck(t.levelInfo)},r.onFragLoaded=function(e,t){var r=t.frag,i=t.part,n=i?i.stats:r.stats;if(r.type===w&&this.bwEstimator.sampleTTFB(n.loading.first-n.loading.start),!this.ignoreFragment(r)){if(this.clearTimer(),r.level===this._nextAutoLevel&&(this._nextAutoLevel=-1),this.firstSelection=-1,this.hls.config.abrMaxWithRealBitrate){var a=i?i.duration:r.duration,s=this.hls.levels[r.level],o=(s.loaded?s.loaded.bytes:0)+n.loaded,l=(s.loaded?s.loaded.duration:0)+a;s.loaded={bytes:o,duration:l},s.realBitrate=Math.round(8*o/l)}if(r.bitrateTest){var u={stats:n,frag:r,part:i,id:r.type};this.onFragBuffered(b.FRAG_BUFFERED,u),r.bitrateTest=!1}else this.lastLoadedFragLevel=r.level}},r.onFragBuffered=function(e,t){var r=t.frag,i=t.part,n=null!=i&&i.stats.loaded?i.stats:r.stats;if(!n.aborted&&!this.ignoreFragment(r)){var a=n.parsing.end-n.loading.start-Math.min(n.loading.first-n.loading.start,this.bwEstimator.getEstimateTTFB());this.bwEstimator.sample(a,n.loaded),n.bwEstimate=this.getBwEstimate(),r.bitrateTest?this.bitrateTestDelay=a/1e3:this.bitrateTestDelay=0}},r.ignoreFragment=function(e){return e.type!==w||"initSegment"===e.sn},r.clearTimer=function(){this.timer>-1&&(self.clearInterval(this.timer),this.timer=-1)},r.getAutoLevelKey=function(){return this.getBwEstimate()+"_"+this.getStarvationDelay().toFixed(2)},r.getNextABRAutoLevel=function(){var e=this.fragCurrent,t=this.partCurrent,r=this.hls;if(r.levels.length<=1)return r.loadLevel;var i=r.maxAutoLevel,n=r.config,a=r.minAutoLevel,s=t?t.duration:e?e.duration:0,o=this.getBwEstimate(),l=this.getStarvationDelay(),u=n.abrBandWidthFactor,d=n.abrBandWidthUpFactor;if(l){var h=this.findBestLevel(o,a,i,l,0,u,d);if(h>=0)return this.rebufferNotice=-1,h}var f=s?Math.min(s,n.maxStarvationDelay):n.maxStarvationDelay;if(!l){var c=this.bitrateTestDelay;c&&(f=(s?Math.min(s,n.maxLoadingDelay):n.maxLoadingDelay)-c,this.info("bitrate test took "+Math.round(1e3*c)+"ms, set first fragment max fetchDuration to "+Math.round(1e3*f)+" ms"),u=d=1)}var g=this.findBestLevel(o,a,i,l,f,u,d);if(this.rebufferNotice!==g&&(this.rebufferNotice=g,this.info((l?"rebuffering expected":"buffer is empty")+", optimal quality level "+g)),g>-1)return g;var v=r.levels[a],m=r.loadLevelObj;return m&&(null==v?void 0:v.bitrate)<m.bitrate?a:r.loadLevel},r.getStarvationDelay=function(){var e=this.hls,t=e.media;if(!t)return 1/0;var r=t&&0!==t.playbackRate?Math.abs(t.playbackRate):1,i=e.mainForwardBufferInfo;return(i?i.len:0)/r},r.getBwEstimate=function(){return this.bwEstimator.canEstimate()?this.bwEstimator.getEstimate():this.hls.config.abrEwmaDefaultEstimate},r.findBestLevel=function(e,t,r,i,n,a,s){var o,l=this,u=i+n,d=this.lastLoadedFragLevel,h=-1===d?this.hls.