ArtPlayer/docs/compiled/artplayer-plugin-auto-thumbnail.js

/*!
 * artplayer-plugin-auto-thumbnail.js v1.1.0
 * Github: https://github.com/zhw2590582/ArtPlayer
 * (c) 2017-2026 Harvey Zhao
 * Released under the MIT License.
 */
!function(e,t){"object"===typeof exports&&"undefined"!==typeof module?module.exports=t():"function"==typeof define&&define.amd?(e.artplayerPluginAutoThumbnail=t(),define(function(){return e.artplayerPluginAutoThumbnail})):(e="undefined"!==typeof globalThis?globalThis:e||self).artplayerPluginAutoThumbnail=t()}(this,function(){"use strict";function e(e){let t,n=!1;for(const r of e)try{r()}catch(i){n||(n=!0,t=i)}return{failed:n,failure:t}}function t(t,n){const i="function"===typeof n.requestVideoFrameCallback&&"function"===typeof n.cancelVideoFrameCallback;let r;function o(){const t=r;r=void 0;const i=e([()=>{n.onloadeddata=null},()=>{n.onseeked=null},()=>{t&&null!==t.timer&&clearTimeout(t.timer)},()=>{t&&null!==t.frame&&n.cancelVideoFrameCallback(t.frame)}]);if(i.failed)throw i.failure}return t.own(o),(e,a)=>{if(o(),!t.active())return;const u={frame:null,timer:null,sought:!1,presented:!i,retries:0,sequence:0,started:!1};r=u;const d=()=>t.active()&&r===u,c=t.guard(()=>{d()&&u.sought&&u.presented&&(o(),t.active()&&a())}),l=()=>{u.sought=!1,(()=>{if(!i)return;const e=++u.sequence;u.presented=!1;const r=u.frame;if(u.frame=null,null!==r&&n.cancelVideoFrameCallback(r),!d())return;let o=!1;const a=n.requestVideoFrameCallback(t.guard(()=>{d()&&e===u.sequence&&!o&&(o=!0,u.frame=null,u.presented=!0,c())}));d()&&e===u.sequence&&!o?u.frame=a:n.cancelVideoFrameCallback(a)})(),d()&&(n.currentTime=e)},s=t.guard(()=>{d()&&!u.started&&(u.started=!0,n.onloadeddata=null,n.onseeked=t.guard(()=>{if(!d()||n.seeking)return;const t=n.currentTime;if(d())if(!Number.isFinite(t)||Math.abs(t-e)>.05){if(++u.retries>3)throw new Error("Auto-thumbnail seek did not reach the requested time");l()}else u.sought=!0,c()}),l())});if(u.timer=setTimeout(t.guard(()=>{if(d())throw new Error("Auto-thumbnail frame readiness timed out")}),3e4),!d())return void clearTimeout(u.timer);const f=!i||n.readyState>=2;d()&&(f?s():n.onloadeddata=s)}}function n(e,n){const i=function(e){const t=document.createElement("video");e.own(()=>t.remove()),e.own(()=>t.load()),e.own(()=>t.removeAttribute("src")),e.own(()=>t.pause());for(const n of["onloadedmetadata","onloadeddata","onseeked","onerror"])e.own(()=>{t[n]=null});return e.active()?(t.crossOrigin="anonymous",t.muted=!0,t.playsInline=!0,t.tabIndex=-1,t.setAttribute("aria-hidden","true"),t.style.cssText="position:fixed;left:0;top:0;visibility:hidden;pointer-events:none;display:block;width:auto;height:auto;max-width:none;max-height:none",document.documentElement.appendChild(t),e.active()||t.remove(),t):t}(e);if(!e.active())return;let r=null;const o=()=>{const e=r;r=null,null!==e&&clearTimeout(e)};e.own(o),i.onerror=e.guard(()=>{throw i.error||new Error("Auto-thumbnail media failed to load")}),i.onloadedmetadata=e.guard(()=>{o(),i.onloadedmetadata=null;const r=i.duration,a=i.videoHeight,u=i.videoWidth,{height:d,canvasWidth:c,canvasHeight:l}=function(e,t){if(!Number.isFinite(t.duration)||t.duration<=0||!Number.isFinite(t.videoWidth)||t.videoWidth<=0||!Number.isFinite(t.videoHeight)||t.videoHeight<=0)throw new TypeError("Auto-thumbnail requires finite media duration and dimensions");const n=Math.floor(e.width*t.videoHeight/t.videoWidth),i=Math.trunc(10*e.width),r=Math.trunc(n*Math.ceil(e.number/10));if(![n,i,r].every(e=>Number.isSafeInteger(e)&&e>0&&e<=4294967295))throw new RangeError("Auto-thumbnail canvas dimensions are invalid");return{height:n,canvasWidth:i,canvasHeight:r}}(n,{duration:r,videoHeight:a,videoWidth:u});if(!e.active())return;i.width=u,i.height=a,i.style.width=`${u}px`,i.style.height=`${a}px`;const s=document.createElement("canvas");if(e.own(()=>{s.height=0}),e.own(()=>{s.width=0}),!e.active())return;if(s.width=c,!e.active())return;if(s.height=l,!e.active())return;const f=s.getContext("2d");if(!f)throw new Error("Auto-thumbnail canvas context is unavailable");if(!e.active())return;const h=t(e,i),m=function(e,t){let n;function i(){const e=n;n=void 0,e&&null!==e.timer&&clearTimeout(e.timer)}return e.own(i),r=>{if(!e.active())return;if(n)throw new Error("Auto-thumbnail encoding is already pending");const o={timer:null};n=o;const a=()=>e.active()&&n===o;o.timer=setTimeout(e.guard(()=>{if(a())throw new Error("Auto-thumbnail encoding timed out")}),3e4),a()?t.toBlob(e.guard(t=>{a()&&(i(),e.active()&&r(t))}),"image/jpeg"):clearTimeout(o.timer)}}(e,s);let v=0;const b=e.guard(()=>{v>=n.number?e.dispose():h(r*v/n.number,e.guard(()=>{f.drawImage(i,v%10*n.width,Math.floor(v/10)*d,n.width,d),e.active()&&m(t=>{e.publish(t,{height:d,column:10,number:n.number,width:n.width,scale:n.scale}),e.active()&&(v+=1,b())})}))});b()}),e.active()&&(r=setTimeout(e.guard(()=>{if(null!==r)throw new Error("Auto-thumbnail metadata timed out")}),3e4),e.active()?i.src=n.url:o())}function i(t){return async i=>{const r=e=>console.warn("ArtPlayer auto-thumbnail failed:",e),o=function(t,n){let i,r,o=!1;const a=new Set;function u(e){void 0!==e&&a.delete(e)&&URL.revokeObjectURL(e)}function d(){const e=i;i=void 0,e?.dispose()}return{start:function(){if(o)return;const d=i,c=[];let l=!1;const s={active:()=>!o&&!l&&i===s,own(t){if(l){const i=e([t]);i.failed&&n(i.failure)}else c.push(t)},dispose(){if(l)return;l=!0,i===s&&(i=void 0);const t=e(c.splice(0).reverse());t.failed&&n(t.failure)},fail(e){s.active()&&(s.dispose(),n(e))},guard:e=>(...t)=>{if(s.active())try{return e(...t)}catch(n){s.fail(n)}},publish(i,o){if(!s.active())return;if(!i)throw new Error("Auto-thumbnail encoding returned no Blob");const d=URL.createObjectURL(i);if(a.add(d),!s.active())return void u(d);const c=r;r=d;try{t({url:d,...o})}catch(l){r===d&&(r=void 0!==c&&a.has(c)?c:void 0);const t=e([()=>u(d)]);throw t.failed&&n(t.failure),l}u(c)}};return i=s,d?.dispose(),s},cancel:d,destroy:function(){if(o)return;o=!0;const t=e([d,...[...a].map(e=>()=>u(e))]);r=void 0,t.failed&&n(t.failure)},get closed(){return o}}}(e=>{i.thumbnails=e},r),a=[],u=()=>{const e=o.start();e&&e.guard(()=>{const r=function(e,t){const n={url:e.url||t(),width:e.width||160,number:e.number||100,scale:e.scale||1};if(!Number.isFinite(Number(n.width))||n.width<=0||!Number.isFinite(Number(n.number))||n.number<=0)throw new TypeError("Auto-thumbnail width and number must be finite positive numbers");return n}(t,()=>i.option.url);e.active()&&n(e,r)})()},d=()=>{const t=a.splice(0),n=e([o.destroy,...t]);n.failed&&r(n.failure)};try{const e=[["destroy",d],["restart",o.cancel],["video:loadedmetadata",u]];for(const[t,n]of e){if(o.closed)break;a.push(()=>i.off(t,n)),i.on(t,n),o.closed&&i.off(t,n)}}catch(c){throw d(),c}return{name:"artplayerPluginAutoThumbnail"}}}return i.default=i,i});