fix(auto-thumbnail): [PKG-AUTO-THUMB-07] release terminal canvas storage

packages/artplayer-plugin-auto-thumbnail/ARCHITECTURE.md

@@ -24,6 +24,13 @@ for video processing.
   handlers, and the frame/encode sequence. Each valid draw is encoded before the
   next seek. The final decoder is paused, cleared and reset; the final sheet URL
   remains owned by the session until another usable sheet replaces it or destroy.
+  The private canvas is also job-owned: cancellation, failure and normal completion
+  reset both dimensions to zero, even if an encoding callback still retains it.
+  Width and height resets are independent cleanup actions, so one throwing setter
+  cannot prevent the other reset or decoder cleanup. Allocation checks job identity
+  after each dimension write; synchronous destruction cannot reallocate the sheet.
+  Previously encoded JPEG Blobs/URLs retain their independent bytes. This controls
+  canvas dimensions, not the browser's precise GPU/encoder reclamation time.
 - `src/video.ts` creates and owns the hidden media element. It is attached to the
   document root because detached media loses drawable pixels on Windows WebKit.
   `visibility:hidden` preserves its rendered box; `display:none` and a 1px box do

packages/artplayer-plugin-auto-thumbnail/dist/artplayer-plugin-auto-thumbnail.js

@@ -4,4 +4,4 @@
  * (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;if(r=void 0,n.onloadeddata=null,n.onseeked=null,!t)return;const i=e([()=>{null!==t.timer&&clearTimeout(t.timer)},()=>{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,s=t.guard(()=>{d()&&u.sought&&u.presented&&(o(),t.active()&&a())}),c=()=>{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,s())}));d()&&e===u.sequence&&!o?u.frame=a:n.cancelVideoFrameCallback(a)})(),d()&&(n.currentTime=e)},l=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");c()}else u.sought=!0,s()}),c())});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?l():n.onloadeddata=l)}}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);e.active()&&(i.onerror=e.guard(()=>{throw i.error||new Error("Auto-thumbnail media failed to load")}),i.onloadedmetadata=e.guard(()=>{i.onloadedmetadata=null;const r=i.duration,o=i.videoHeight,a=i.videoWidth,{height:u,canvasWidth:d,canvasHeight:s}=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:o,videoWidth:a});if(!e.active())return;i.width=a,i.height=o,i.style.width=`${a}px`,i.style.height=`${o}px`;const c=document.createElement("canvas");if(!e.active())return;c.width=d,c.height=s;const l=c.getContext("2d");if(!l)throw new Error("Auto-thumbnail canvas context is unavailable");if(!e.active())return;const f=t(e,i);let h=0;const m=e.guard(()=>{h>=n.number?e.dispose():f(r*h/n.number,e.guard(()=>{if(l.drawImage(i,h%10*n.width,Math.floor(h/10)*u,n.width,u),!e.active())return;let t=!1;c.toBlob(e.guard(i=>{t||(t=!0,e.publish(i,{height:u,column:10,number:n.number,width:n.width,scale:n.scale}),e.active()&&(h+=1,m()))}),"image/jpeg")}))});m()}),e.active()&&(i.src=n.url))}return function(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,s=[];let c=!1;const l={active:()=>!o&&!c&&i===l,own(t){if(c){const i=e([t]);i.failed&&n(i.failure)}else s.push(t)},dispose(){if(c)return;c=!0,i===l&&(i=void 0);const t=e(s.splice(0).reverse());t.failed&&n(t.failure)},fail(e){l.active()&&(l.dispose(),n(e))},guard:e=>(...t)=>{if(l.active())try{return e(...t)}catch(n){l.fail(n)}},publish(i,o){if(!l.active())return;if(!i)throw new Error("Auto-thumbnail encoding returned no Blob");const d=URL.createObjectURL(i);if(a.add(d),!l.active())return void u(d);const s=r;r=d;try{t({url:d,...o})}catch(c){r===d&&(r=void 0!==s&&a.has(s)?s:void 0);const t=e([()=>u(d)]);throw t.failed&&n(t.failure),c}u(s)}};return i=l,d?.dispoLine truncated
+!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,i=!1;for(const r of e)try{r()}catch(n){i||(i=!0,t=n)}return{failed:i,failure:t}}function t(t,i){const n="function"===typeof i.requestVideoFrameCallback&&"function"===typeof i.cancelVideoFrameCallback;let r;function o(){const t=r;if(r=void 0,i.onloadeddata=null,i.onseeked=null,!t)return;const n=e([()=>{null!==t.timer&&clearTimeout(t.timer)},()=>{null!==t.frame&&i.cancelVideoFrameCallback(t.frame)}]);if(n.failed)throw n.failure}return t.own(o),(e,a)=>{if(o(),!t.active())return;const u={frame:null,timer:null,sought:!1,presented:!n,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())}),s=()=>{u.sought=!1,(()=>{if(!n)return;const e=++u.sequence;u.presented=!1;const r=u.frame;if(u.frame=null,null!==r&&i.cancelVideoFrameCallback(r),!d())return;let o=!1;const a=i.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:i.cancelVideoFrameCallback(a)})(),d()&&(i.currentTime=e)},l=t.guard(()=>{d()&&!u.started&&(u.started=!0,i.onloadeddata=null,i.onseeked=t.guard(()=>{if(!d()||i.seeking)return;const t=i.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");s()}else u.sought=!0,c()}),s())});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=!n||i.readyState>=2;d()&&(f?l():i.onloadeddata=l)}}function i(e,i){const n=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 i of["onloadedmetadata","onloadeddata","onseeked","onerror"])e.own(()=>{t[i]=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);e.active()&&(n.onerror=e.guard(()=>{throw n.error||new Error("Auto-thumbnail media failed to load")}),n.onloadedmetadata=e.guard(()=>{n.onloadedmetadata=null;const r=n.duration,o=n.videoHeight,a=n.videoWidth,{height:u,canvasWidth:d,canvasHeight:c}=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 i=Math.floor(e.width*t.videoHeight/t.videoWidth),n=Math.trunc(10*e.width),r=Math.trunc(i*Math.ceil(e.number/10));if(![i,n,r].every(e=>Number.isSafeInteger(e)&&e>0&&e<=4294967295))throw new RangeError("Auto-thumbnail canvas dimensions are invalid");return{height:i,canvasWidth:n,canvasHeight:r}}(i,{duration:r,videoHeight:o,videoWidth:a});if(!e.active())return;n.width=a,n.height=o,n.style.width=`${a}px`,n.style.height=`${o}px`;const s=document.createElement("canvas");if(e.own(()=>{s.height=0}),e.own(()=>{s.width=0}),!e.active())return;if(s.width=d,!e.active())return;if(s.height=c,!e.active())return;const l=s.getContext("2d");if(!l)throw new Error("Auto-thumbnail canvas context is unavailable");if(!e.active())return;const f=t(e,n);let h=0;const m=e.guard(()=>{h>=i.number?e.dispose():f(r*h/i.number,e.guard(()=>{if(l.drawImage(n,h%10*i.width,Math.floor(h/10)*u,i.width,u),!e.active())return;let t=!1;s.toBlob(e.guard(n=>{t||(t=!0,e.publish(n,{height:u,column:10,number:i.number,width:i.width,scale:i.scale}),e.active()&&(h+=1,m()))}),"image/jpeg")}))});m()}),e.active()&&(n.src=i.url))}return function(t){return async n=>{const r=e=>console.warn("ArtPlayer auto-thumbnail failed:",e),o=function(t,i){let n,r,o=!1;const a=new Set;function u(e){void 0!==e&&a.delete(e)&&URL.revokeObjectURL(e)}function d(){const e=n;n=void 0,e?.dispose()}return{start:function(){if(o)return;const d=n,c=[];let s=!1;const l={active:()=>!o&&!s&&n===l,own(t){if(s){const n=e([t]);n.failed&&i(n.failure)}else c.push(t)},dispose(){if(s)return;s=!0,n===l&&(n=void 0);const 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packages/artplayer-plugin-auto-thumbnail/dist/artplayer-plugin-auto-thumbnail.legacy.js

@@ -4,4 +4,4 @@
  * (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";var e=Object.defineProperty,t=Object.getOwnPropertySymbols,n=Object.prototype.hasOwnProperty,r=Object.prototype.propertyIsEnumerable,i=(t,n,r)=>n in t?e(t,n,{enumerable:!0,configurable:!0,writable:!0,value:r}):t[n]=r;function o(e){let t,n=!1;for(const i of e)try{i()}catch(r){n||(n=!0,t=r)}return{failed:n,failure:t}}function a(e,a){let u,d,l=!1;const c=new Set;function s(e){void 0!==e&&c.delete(e)&&URL.revokeObjectURL(e)}function f(){const e=u;u=void 0,null==e||e.dispose()}return{start:function(){if(l)return;const f=u,h=[];let m=!1;const v={active:()=>!l&&!m&&u===v,own(e){if(m){const t=o([e]);t.failed&&a(t.failure)}else 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0,t.onloadeddata=null,t.onseeked=null,!e)return;const n=o([()=>{null!==e.timer&&clearTimeout(e.timer)},()=>{null!==e.frame&&t.cancelVideoFrameCallback(e.frame)}]);if(n.failed)throw n.failure}return e.own(i),(o,a)=>{if(i(),!e.active())return;const u={frame:null,timer:null,sought:!1,presented:!n,retries:0,sequence:0,started:!1};r=u;const d=()=>e.active()&&r===u,l=e.guard(()=>{d()&&u.sought&&u.presented&&(i(),e.active()&&a())}),c=()=>{u.sought=!1,(()=>{if(!n)return;const r=++u.sequence;u.presented=!1;const i=u.frame;if(u.frame=null,null!==i&&t.cancelVideoFrameCallback(i),!d())return;let o=!1;const a=t.requestVideoFrameCallback(e.guard(()=>{d()&&r===u.sequence&&!o&&(o=!0,u.frame=null,u.presented=!0,l())}));d()&&r===u.sequence&&!o?u.frame=a:t.cancelVideoFrameCallback(a)})(),d()&&(t.currentTime=o)},s=e.guard(()=>{d()&&!u.started&&(u.started=!0,t.onloadeddata=null,t.onseeked=e.guard(()=>{if(!d()||t.seeking)return;const e=t.currentTime;if(d())if(!Number.isFinite(e)||Math.abs(e-o)>.05){if(++u.retries>3)throw new Error("Auto-thumbnail seek did not reach the requested time");c()}else u.sought=!0,l()}),c())});if(u.timer=setTimeout(e.guard(()=>{if(d())throw new Error("Auto-thumbnail frame readiness timed out")}),3e4),!d())return void clearTimeout(u.timer);const f=!n||t.readyState>=2;d()&&(f?s():t.onloadeddata=s)}}function d(e,t){const n=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);e.active()&&(n.onerror=e.guard(()=>{throw n.error||new Error("Auto-thumbnail media failed to load")}),n.onloadedmetadata=e.guard(()=>{n.onloadedmetadata=null;const r=n.duration,i=n.videoHeight,o=n.videoWidth,{height:a,canvasWidth:d,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),r=Math.trunc(10*e.width),i=Math.trunc(n*Math.ceil(e.number/10));if(![n,r,i].every(e=>Number.isSafeInteger(e)&&e>0&&e<=4294967295))throw new RangeError("Auto-thumbnail canvas dimensions are invalid");return{height:n,canvasWidth:r,canvasHeight:i}}(t,{duration:r,videoHeight:i,videoWidth:o});if(!e.active())return;n.width=o,n.height=i,n.style.width=`${o}px`,n.style.height=`${i}px`;const c=document.createElement("canvas");if(e.own(()=>{c.height=0}),e.own(()=>{c.width=0}),!e.active())return;if(c.width=d,!e.active())return;if(c.height=l,!e.active())retuLine truncated

packages/artplayer-plugin-auto-thumbnail/dist/artplayer-plugin-auto-thumbnail.mjs

@@ -301,10 +301,20 @@ function extract(job, config) {
     video.style.width = `${videoWidth}px`;
     video.style.height = `${videoHeight}px`;
     const canvas = document.createElement("canvas");
+    job.own(() => {
+      canvas.height = 0;
+    });
+    job.own(() => {
+      canvas.width = 0;
+    });
     if (!job.active())
       return;
     canvas.width = canvasWidth;
+    if (!job.active())
+      return;
     canvas.height = canvasHeight;
+    if (!job.active())
+      return;
     const ctx = canvas.getContext("2d");
     if (!ctx)
       throw new Error("Auto-thumbnail canvas context is unavailable");

packages/artplayer-plugin-auto-thumbnail/src/extraction.ts

@@ -27,10 +27,20 @@ export default function extract(job: ExtractionJob, config: ExtractionConfig) {
     video.style.width = `${videoWidth}px`
     video.style.height = `${videoHeight}px`
     const canvas = document.createElement('canvas')
+    job.own(() => {
+      canvas.height = 0
+    })
+    job.own(() => {
+      canvas.width = 0
+    })
     if (!job.active())
       return
     canvas.width = canvasWidth
+    if (!job.active())
+      return
     canvas.height = canvasHeight
+    if (!job.active())
+      return
     const ctx = canvas.getContext('2d')
     if (!ctx)
       throw new Error('Auto-thumbnail canvas context is unavailable')