decoder.js

/*
*
* decoder.js v2.1.1
* Copyright (c) 2026-3-3 Ezviz-OpenBiz
*
* https://github.com/Ezviz-OpenBiz/EZUIKit-flv
*
*/
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H=[Math.floor(o/1e3)>>>0,(V=Math.floor(o/1e3),+Math.abs(V)>=1?V>0?+Math.floor(V/4294967296)>>>0:~~+Math.ceil((V-+(~~V>>>0))/4294967296)>>>0:0)],C[t+40>>2]=H[0],C[t+44>>2]=H[1],_[t+48>>2]=o%1e3*1e3,H=[Math.floor(a/1e3)>>>0,(V=Math.floor(a/1e3),+Math.abs(V)>=1?V>0?+Math.floor(V/4294967296)>>>0:~~+Math.ceil((V-+(~~V>>>0))/4294967296)>>>0:0)],C[t+56>>2]=H[0],C[t+60>>2]=H[1],_[t+64>>2]=a%1e3*1e3,H=[Math.floor(i/1e3)>>>0,(V=Math.floor(i/1e3),+Math.abs(V)>=1?V>0?+Math.floor(V/4294967296)>>>0:~~+Math.ceil((V-+(~~V>>>0))/4294967296)>>>0:0)],C[t+72>>2]=H[0],C[t+76>>2]=H[1],_[t+80>>2]=i%1e3*1e3,H=[n.ino>>>0,(V=n.ino,+Math.abs(V)>=1?V>0?+Math.floor(V/4294967296)>>>0:~~+Math.ceil((V-+(~~V>>>0))/4294967296)>>>0:0)],C[t+88>>2]=H[0],C[t+92>>2]=H[1],0},doMsync(e,r,t,n,o){if(!ke.isFile(r.node.mode))throw new ke.ErrnoError(43);if(2&n)return 0;var a=w.slice(e,e+t);ke.msync(r,a,o,t,n)},getStreamFromFD:e=>ke.getStreamChecked(e),varargs:void 0,getStr:e=>se(e)},De=e=>{for(var 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OffscreenCanvas},initAudioPlanar:function(e,t){postMessage({cmd:b,sampleRate:t,channels:e});const n=[];let o=0;this.playAudioPlanar=function(t,a,i){let s=a;const l=[];let d=0;for(let e=0;e<2;e++){const r=h.HEAPU32[(t>>2)+e]>>2;l[e]=h.HEAPF32.subarray(r,r+s)}if(o){if(!(s>=(a=1024-o)))return o+=s,r[0]=Float32Array.of(...r[0],...l[0]),void(2===e&&(r[1]=Float32Array.of(...r[1],...l[1])));n[0]=Float32Array.of(...r[0],...l[0].subarray(0,a)),2===e&&(n[1]=Float32Array.of(...r[1],...l[1].subarray(0,a))),postMessage({cmd:w,buffer:n,ts:i},n.map((e=>e.buffer))),d=a,s-=a}for(o=s;o>=1024;o-=1024)n[0]=l[0].slice(d,d+=1024),2===e&&(n[1]=l[1].slice(d-1024,d)),postMessage({cmd:w,buffer:n,ts:i},n.map((e=>e.buffer)));o&&(r[0]=l[0].slice(d),2===e&&(r[1]=l[1].slice(d)))}},setVideoCodec:function(e){postMessage({cmd:C,code:e})},setAudioCodec:function(e){postMessage({cmd:T,code:e})},setVideoSize:function(e,r){postMessage({cmd:v,w:e,h:r});const t=e*r,o=t>>2;n.useOffscreen()?(this.offscreenCanvas=new 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o=e.createShader(e.VERTEX_SHADER);e.shaderSource(o,t),e.compileShader(o),e.getShaderParameter(o,e.COMPILE_STATUS);var a=e.createShader(e.FRAGMENT_SHADER);e.shaderSource(a,n),e.compileShader(a),e.getShaderParameter(a,e.COMPILE_STATUS);var i=e.createProgram();e.attachShader(i,o),e.attachShader(i,a),e.linkProgram(i),e.getProgramParameter(i,e.LINK_STATUS),e.useProgram(i);var s=e.createBuffer();e.bindBuffer(e.ARRAY_BUFFER,s),e.bufferData(e.ARRAY_BUFFER,new Float32Array([1,1,-1,1,1,-1,-1,-1]),e.STATIC_DRAW);var l=e.getAttribLocation(i,"vertexPos");e.enableVertexAttribArray(l),e.vertexAttribPointer(l,2,e.FLOAT,!1,0,0);var d=e.createBuffer();e.bindBuffer(e.ARRAY_BUFFER,d),e.bufferData(e.ARRAY_BUFFER,new Float32Array([1,0,0,0,1,1,0,1]),e.STATIC_DRAW);var u=e.getAttribLocation(i,"texturePos");function c(r,t){var n=e.createTexture();return e.bindTexture(e.TEXTURE_2D,n),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MAG_FILTER,e.LINEAR),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MIN_FILTER,e.LINEAR),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_S,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_T,e.CLAMP_TO_EDGE),e.bindTexture(e.TEXTURE_2D,null),e.uniform1i(e.getUniformLocation(i,r),t),n}e.enableVertexAttribArray(u),e.vertexAttribPointer(u,2,e.FLOAT,!1,0,0);var f=c("ySampler",0),p=c("uSampler",1),m=c("vSampler",2);return{render:function(r,t,n,o,a){e.viewport(0,0,r,t),e.activeTexture(e.TEXTURE0),e.bindTexture(e.TEXTURE_2D,f),e.texImage2D(e.TEXTURE_2D,0,e.LUMINANCE,r,t,0,e.LUMINANCE,e.UNSIGNED_BYTE,n),e.activeTexture(e.TEXTURE1),e.bindTexture(e.TEXTURE_2D,p),e.texImage2D(e.TEXTURE_2D,0,e.LUMINANCE,r/2,t/2,0,e.LUMINANCE,e.UNSIGNED_BYTE,o),e.activeTexture(e.TEXTURE2),e.bindTexture(e.TEXTURE_2D,m),e.texImage2D(e.TEXTURE_2D,0,e.LUMINANCE,r/2,t/2,0,e.LUMINANCE,e.UNSIGNED_BYTE,a),e.drawArrays(e.TRIANGLE_STRIP,0,4)},destroy:function(){try{e.deleteProgram(i),e.deleteBuffer(s),e.deleteBuffer(d),e.deleteTexture(f),e.deleteTexture(p),e.deleteTexture(m)}catch(e){}}}})(this.offscreenCanvasGL,n.opt.openWebglAlignment),this.draw=function(n,a,i,s){const l=h.HEAPU8.subarray(a,a+t),d=h.HEAPU8.subarray(i,i+o),u=h.HEAPU8.subarray(s,s+o);this.webglObj.render(e,r,l,d,u);const c=this.offscreenCanvas.transferToImageBitmap();postMessage({cmd:E,buffer:c,delay:this.delay,ts:n},[c])}):this.draw=function(e,r,n,a,i,s){const l=[Uint8Array.from(h.HEAPU8.subarray(r,r+t)),Uint8Array.from(h.HEAPU8.subarray(n,n+o)),Uint8Array.from(h.HEAPU8.subarray(a,a+o))];postMessage({cmd:E,output:l,delay:this.delay,ts:e,w:i,h:s},l.map((e=>e.buffer)))}},getDelay:function(e){if(!e)return-1;if(this.firstTimestamp){if(e){const r=Date.now()-this.startTimestamp,t=e-this.firstTimestamp;this.delay=r>=t?r-t:t-r}}else this.firstTimestamp=e,this.startTimestamp=Date.now(),this.delay=-1;return this.delay},resetDelay:function(){this.firstTimestamp=null,this.startTimestamp=null,this.delay=-1},init:function(){n.opt.debug;const r=e=>{n.opt.useWCS&&n.useOffscreen()&&e.type===S&&t.decode?t.decode(e.payload,e.ts):e.decoder.decode(e.payload,e.ts)};this.stopId=setInterval((()=>{if(e.length)if(this.dropping){let t=e.shift();for(t&&t.type===_&&0===t.payload[1]&&r(t);!t.isIFrame&&e.length;)t=e.shift(),t.type===_&&0===t.payload[1]&&r(t);t.isIFrame&&(this.dropping=!1,r(t))}else{let t=e[0];if(-1===this.getDelay(t.ts))e.shift(),r(t);else if(this.delay>n.opt.videoBuffer+n.opt.videoBufferDelay)this.resetDelay(),this.dropping=!0;else for(;e.length&&(t=e[0],this.getDelay(t.ts)>n.opt.videoBuffer);)e.shift(),r(t)}}),10)},close:function(){var i,s,l,d;n.opt.debug,clearInterval(this.stopId),this.stopId=null,null==o||null===(i=o.clear)||void 0===i||i.call(o),null==a||null===(s=a.clear)||void 0===s||s.call(a),null===(l=t)||void 0===l||null===(d=l.reset)||void 0===d||d.call(l),this.firstTimestamp=null,this.startTimestamp=null,this.delay=-1,this.dropping=!1,this.webglObj&&(this.webglObj.destroy(),this.offscreenCanvas=null,this.offscreenCanvasGL=null,this.offscreenCanvasCtx=null),e=[],r=[],delete this.playAudioPlanar,delete this.draw},pushBuffer:function(r,t){t.type===_?e.push({ts:t.ts,payload:r,decoder:o,type:_}):t.type===S&&e.push({ts:t.ts,payload:r,decoder:a,type:S,isIFrame:t.isIFrame})}},o=new h.AudioDecoder(n),a=new h.VideoDecoder(n);self.onmessage=function(e){const r=e.data;switch(r.cmd){case P:try{n.opt=Object.assign(n.opt,JSON.parse(r.opt))}catch(e){}o.sample_rate=r.sampleRate,n.init();break;case k:n.pushBuffer(r.buffer,r.options);break;case A:o.decode(r.buffer,r.ts);break;case D:a.decode(r.buffer,r.ts);break;case O:n.close();break;case F:n.opt[r.key]=r.value}}},h.onRuntimeInitialized=function(){setTimeout((()=>{postMessage({cmd:P})}),10)}}));