@webav/av-cliper/dist/av-cliper.umd.cjs

WebCodecs-based, combine video, audio, images, text, with animation support 基于 WebCodecs 合成 视频、音频、图片、文字，支持动画

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Float32Array(t*2);for(let a=0;a<t;a++){let o=0,c=0;for(let l=0;l<r.length;l++){const m=((i=r[l][0])==null?void 0:i[a])??0,u=((s=r[l][1])==null?void 0:s[a])??m;o+=m,c+=u}e[a]=o,e[a+t]=c}return e}async function Ei(r,t,e){const i=r.length,s=Array(e.chanCount).fill(0).map(()=>new Float32Array(0));if(i===0)return s;const a=Math.max(...r.map(m=>m.length));if(a===0)return s;if(globalThis.OfflineAudioContext==null)return r.map(m=>new Float32Array(vi.resample(m,t,e.rate,{method:"sinc",LPF:!1})));const o=new globalThis.OfflineAudioContext(e.chanCount,a*e.rate/t,e.rate),c=o.createBufferSource(),l=o.createBuffer(i,a,t);return r.forEach((m,u)=>l.copyToChannel(m,u)),c.buffer=l,c.connect(o.destination),c.start(),De(await o.startRendering())}function Oe(r){return new Promise(t=>{const e=g.workerTimer(()=>{e(),t()},r)})}function Be(r,t,e){const i=e-t,s=new Float32Array(i);let a=0;for(;a<i;)s[a]=r[(t+a)%r.length],a+=1;return s}function ti(r,t){const e=Math.floor(r.length/t),i=new Float32Array(e);for(let s=0;s<e;s++){const a=s*t,o=Math.floor(a),c=a-o;o+1<r.length?i[s]=r[o]*(1-c)+r[o+1]*c:i[s]=r[o]}return i}const I={sampleRate:48e3,channelCount:2,codec:"mp4a.40.2"};function _e(r,t){const e=t.videoTracks[0],i={};if(e!=null){const a=Pi(r.getTrackById(e.id)).buffer,{descKey:o,type:c}=e.codec.startsWith("avc1")?{descKey:"avcDecoderConfigRecord",type:"avc1"}:e.codec.startsWith("hvc1")?{descKey:"hevcDecoderConfigRecord",type:"hvc1"}:{descKey:"",type:""};o!==""&&(i.videoTrackConf={timescale:e.timescale,duration:e.duration,width:e.video.width,height:e.video.height,brands:t.brands,type:c,[o]:a}),i.videoDecoderConf={codec:e.codec,codedHeight:e.video.height,codedWidth:e.video.width,description:a}}const s=t.audioTracks[0];if(s!=null){const a=ei(r);i.audioTrackConf={timescale:s.timescale,samplerate:s.audio.sample_rate,channel_count:s.audio.channel_count,hdlr:"soun",type:s.codec.startsWith("mp4a")?"mp4a":s.codec,description:ei(r)},i.audioDecoderConf={codec:s.codec.startsWith("mp4a")?I.codec:s.codec,numberOfChannels:s.audio.channel_count,sampleRate:s.audio.sample_rate,...a==null?{}:Di(a)}}return i}function Pi(r){for(const t of r.mdia.minf.stbl.stsd.entries){const e=t.avcC??t.hvcC??t.av1C??t.vpcC;if(e!=null){const i=new S.DataStream(void 0,0,S.DataStream.BIG_ENDIAN);return e.write(i),new Uint8Array(i.buffer.slice(8))}}throw Error("avcC, hvcC, av1C or VPX not found")}function ei(r,t="mp4a"){var i;const e=(i=r.moov)==null?void 0:i.traks.map(s=>s.mdia.minf.stbl.stsd.entries).flat().find(({type:s})=>s===t);return e==null?void 0:e.esds}function Di(r){var c;const t=(c=r.esd.descs[0])==null?void 0:c.descs[0];if(t==null)return{};const[e,i]=t.data,s=((e&7)<<1)+(i>>7),a=(i&127)>>3;return{sampleRate:[96e3,88200,64e3,48e3,44100,32e3,24e3,22050,16e3,12e3,11025,8e3,7350][s],numberOfChannels:a}}async function Oi(r,t,e){const i=S.createFile(!1);i.onReady=a=>{var l,m;t({mp4boxFile:i,info:a});const o=(l=a.videoTracks[0])==null?void 0:l.id;o!=null&&i.setExtractionOptions(o,"video",{nbSamples:100});const c=(m=a.audioTracks[0])==null?void 0:m.id;c!=null&&i.setExtractionOptions(c,"audio",{nbSamples:100}),i.start()},i.onSamples=e,await s();async function s(){let a=0;const o=30*1024*1024;for(;;){const c=await r.read(o,{at:a});if(c.byteLength===0)break;c.fileStart=a;const l=i.appendBuffer(c);if(l==null)break;a=l}i.stop()}}let Me=0;function Le(r){return r.kind==="file"&&r.createReader instanceof Function}const bt=class bt{constructor(t,e={}){d(this,Ae,Me++);d(this,Yt,g.Log.create(`MP4Clip 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o=r.slice(0,i===0?r.length:i).map(l=>({...l}));for(let l=e;l<o.length;l++){const m=o[l];t<m.cts&&(m.deleted=!0,m.cts=-1)}Ne(o);const c=r.slice(a.is_idr?s:e).map(l=>({...l,cts:l.cts-t}));for(const l of c)l.cts<0&&(l.deleted=!0,l.cts=-1);return Ne(c),[o,c]}function $i(r,t){if(r.length===0)return[];let e=-1;for(let a=0;a<r.length;a++){const o=r[a];if(!(t>o.cts)){e=a;break}}if(e===-1)throw Error("Not found audio sample by time");const i=r.slice(0,e).map(a=>({...a})),s=r.slice(e).map(a=>({...a,cts:a.cts-t}));return[i,s]}function Ve(r,t,e){let i=0;if(r.state==="configured"){for(;i<t.length;i++)r.decode(t[i]);r.flush().catch(s=>{if(!(s instanceof Error))throw s;if(s.message.includes("Decoding error")&&e.onDecodingError!=null){e.onDecodingError(s);return}if(!s.message.includes("Aborted due to close"))throw s})}}function ji(r,t){if(t!=="avc1"&&t!=="hvc1")return 0;const e=new DataView(r.buffer);let i=0;for(;i<r.byteLength-4;){if(t==="avc1"&&(e.getUint8(i+4)&31)===5)return i;if(t==="hvc1"){const s=e.getUint8(i+4)>>1&63;if(s===19||s===20)return i}i+=e.getUint32(i)+4}return-1}async function Wi(r,t,e,i,s,a){const o=await t.createReader(),c=await ai(r.filter(u=>!u.deleted&&u.is_sync&&u.cts>=s.start&&u.cts<=s.end),o);if(c.length===0||i.aborted)return;let l=0;Ve(m(),c,{onDecodingError:u=>{g.Log.warn("thumbnailsByKeyFrame",u),l===0?Ve(m(!0),c,{onDecodingError:w=>{o.close(),g.Log.error("thumbnailsByKeyFrame retry soft deocde",w)}}):(a(null,!0),o.close())}});function m(u=!1){const w={...e,...u?{hardwareAcceleration:"prefer-software"}:{}},p=new VideoDecoder({output:x=>{l+=1;const f=l===c.length;a(x,f),f&&(o.close(),p.state!=="closed"&&p.close())},error:x=>{const f=`thumbnails decoder error: ${x.message}, config: ${JSON.stringify(w)}, state: ${JSON.stringify({qSize:p.decodeQueueSize,state:p.state,outputCnt:l,inputCnt:c.length})}`;throw g.Log.error(f),Error(f)}});return i.addEventListener("abort",()=>{o.close(),p.state!=="closed"&&p.close()}),p.configure(w),p}}function Ne(r){let t=0,e=null;for(const i of r)if(!i.deleted){if(i.is_sync&&(t+=1),t>=2)break;(e==null||i.cts<e.cts)&&(e=i)}e!=null&&e.cts<2e5&&(e.duration+=e.cts,e.cts=0)}function ri(){try{const r=performance.memory;return{jsHeapSizeLimit:r.jsHeapSizeLimit,totalJSHeapSize:r.totalJSHeapSize,usedJSHeapSize:r.usedJSHeapSize,percentUsed:(r.usedJSHeapSize/r.jsHeapSizeLimit).toFixed(3),percentTotal:(r.totalJSHeapSize/r.jsHeapSizeLimit).toFixed(3)}}catch{return{}}}const kt=class kt{constructor(t){d(this,Re);k(this,"ready");d(this,D,{duration:0,width:0,height:0});d(this,V,null);d(this,F,[]);k(this,"tickInterceptor",async(t,e)=>e);const e=i=>(h(this,V,i),n(this,D).width=i.width,n(this,D).height=i.height,n(this,D).duration=1/0,{...n(this,D)});if(t instanceof ReadableStream)this.ready=new Response(t).blob().then(i=>createImageBitmap(i)).then(e);else if(t instanceof ImageBitmap)this.ready=Promise.resolve(e(t));else if(Array.isArray(t)&&t.every(i=>i instanceof VideoFrame)){h(this,F,t);const 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e=Math.ceil(t/1e6*I.sampleRate),i=new st(this.getPCMData().map(a=>a.slice(0,e)),n(this,Y)),s=new st(this.getPCMData().map(a=>a.slice(e)),n(this,Y));return[i,s]}async clone(){await this.ready;const t=new st(this.getPCMData(),n(this,Y));return await t.ready,t}destroy(){h(this,nt,new Float32Array(0)),h(this,ht,new Float32Array(0)),g.Log.info("---- audioclip destroy ----")}};It=new WeakMap,nt=new WeakMap,ht=new WeakMap,Y=new WeakMap,Fe=new WeakSet,wi=async function(t){st.ctx==null&&(st.ctx=new AudioContext({sampleRate:I.sampleRate}));const e=performance.now(),i=t instanceof ReadableStream?await Xi(t,st.ctx):t;g.Log.info("Audio clip decoded complete:",performance.now()-e);const s=n(this,Y).volume;if(s!==1)for(const a of i)for(let o=0;o<a.length;o+=1)a[o]*=s;n(this,It).duration=i[0].length/I.sampleRate*1e6,h(this,nt,i[0]),h(this,ht,i[1]??n(this,nt)),g.Log.info("Audio clip convert to AudioData, time:",performance.now()-e)},dt=new WeakMap,Q=new WeakMap,k(st,"ctx",null);let $e=st;async function 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WeakSet,gi=function(t){const e=t.split(`
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a.decode(b)).map(qe),T=ki(C),A=x(T[0].length),R=b[0];o==null||o.encode(Ze([T,A]),R.cts/R.timescale*1e6)}return i}const nn=`#version 300 es
  layout (location = 0) in vec4 a_position;
  layout (location = 1) in vec2 a_texCoord;
  out vec2 v_texCoord;
  void main () {
    gl_Position = a_position;
    v_texCoord = a_texCoord;
  }
`,sn=`#version 300 es
precision mediump float;
out vec4 FragColor;
in vec2 v_texCoord;

uniform sampler2D frameTexture;
uniform vec3 keyColor;

// 色度的相似度计算
uniform float similarity;
// 透明度的平滑度计算
uniform float smoothness;
// 降低绿幕饱和度，提高抠图准确度
uniform float spill;

vec2 RGBtoUV(vec3 rgb) {
  return vec2(
    rgb.r * -0.169 + rgb.g * -0.331 + rgb.b *  0.5    + 0.5,
    rgb.r *  0.5   + rgb.g * -0.419 + rgb.b * -0.081  + 0.5
  );
}

void main() {
  // 获取当前像素的rgba值
  vec4 rgba = texture(frameTexture, v_texCoord);
  // 计算当前像素与绿幕像素的色度差值
  vec2 chromaVec = RGBtoUV(rgba.rgb) - RGBtoUV(keyColor);
  // 计算当前像素与绿幕像素的色度距离（向量长度）, 越相像则色度距离越小
  float chromaDist = sqrt(dot(chromaVec, chromaVec));
  // 设置了一个相似度阈值，baseMask为负，则表明是绿幕，为正则表明不是绿幕
  float baseMask = chromaDist - similarity;
  // 如果baseMask为负数，fullMask等于0；baseMask为正数，越大，则透明度越低
  float fullMask = pow(clamp(baseMask / smoothness, 0., 1.), 1.5);
  rgba.a = fullMask; // 设置透明度
  // 如果baseMask为负数，spillVal等于0；baseMask为整数，越小，饱和度越低
  float spillVal = pow(clamp(baseMask / spill, 0., 1.), 1.5);
  float desat = clamp(rgba.r * 0.2126 + rgba.g * 0.7152 + rgba.b * 0.0722, 0., 1.); // 计算当前像素的灰度值
  rgba.rgb = mix(vec3(desat, desat, desat), rgba.rgb, spillVal);
  FragColor = rgba;
}
`,an=[-1,1,-1,-1,1,-1,1,-1,1,1,-1,1],rn=[0,1,0,0,1,0,1,0,1,1,0,1];function on(r,t,e){const i=hi(r,r.VERTEX_SHADER,t),s=hi(r,r.FRAGMENT_SHADER,e),a=r.createProgram();if(r.attachShader(a,i),r.attachShader(a,s),r.linkProgram(a),!r.getProgramParameter(a,r.LINK_STATUS))throw Error(r.getProgramInfoLog(a)??"Unable to initialize the shader program");return a}function hi(r,t,e){const i=r.createShader(t);if(r.shaderSource(i,e),r.compileShader(i),!r.getShaderParameter(i,r.COMPILE_STATUS)){const s=r.getShaderInfoLog(i);throw r.deleteShader(i),Error(s??"An error occurred compiling the shaders")}return i}function cn(r,t,e){r.bindTexture(r.TEXTURE_2D,e),r.texImage2D(r.TEXTURE_2D,0,r.RGBA,r.RGBA,r.UNSIGNED_BYTE,t),r.drawArrays(r.TRIANGLES,0,6)}function ln(r){const t=r.createTexture();if(t==null)throw Error("Create WebGL texture error");r.bindTexture(r.TEXTURE_2D,t);const e=0,i=r.RGBA,s=1,a=1,o=0,c=r.RGBA,l=r.UNSIGNED_BYTE,m=new Uint8Array([0,0,255,255]);return r.texImage2D(r.TEXTURE_2D,e,i,s,a,o,c,l,m),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_MAG_FILTER,r.LINEAR),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_MIN_FILTER,r.LINEAR),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_WRAP_S,r.CLAMP_TO_EDGE),r.texParameteri(r.TEXTURE_2D,r.TEXTURE_WRAP_T,r.CLAMP_TO_EDGE),t}function hn(r){const t="document"in globalThis?globalThis.document.createElement("canvas"):new OffscreenCanvas(r.width,r.height);t.width=r.width,t.height=r.height;const e=t.getContext("webgl2",{premultipliedAlpha:!1,alpha:!0});if(e==null)throw Error("Cant create gl context");const i=on(e,nn,sn);e.useProgram(i),e.uniform3fv(e.getUniformLocation(i,"keyColor"),r.keyColor.map(l=>l/255)),e.uniform1f(e.getUniformLocation(i,"similarity"),r.similarity),e.uniform1f(e.getUniformLocation(i,"smoothness"),r.smoothness),e.uniform1f(e.getUniformLocation(i,"spill"),r.spill);const s=e.createBuffer();e.bindBuffer(e.ARRAY_BUFFER,s),e.bufferData(e.ARRAY_BUFFER,new Float32Array(an),e.STATIC_DRAW);const a=e.getAttribLocation(i,"a_position");e.vertexAttribPointer(a,2,e.FLOAT,!1,Float32Array.BYTES_PER_ELEMENT*2,0),e.enableVertexAttribArray(a);const o=e.createBuffer();e.bindBuffer(e.ARRAY_BUFFER,o),e.bufferData(e.ARRAY_BUFFER,new Float32Array(rn),e.STATIC_DRAW);const c=e.getAttribLocation(i,"a_texCoord");return e.vertexAttribPointer(c,2,e.FLOAT,!1,Float32Array.BYTES_PER_ELEMENT*2,0),e.enableVertexAttribArray(c),e.pixelStorei(e.UNPACK_FLIP_Y_WEBGL,1),{cvs:t,gl:e}}function dn(r){return r instanceof VideoFrame?{width:r.codedWidth,height:r.codedHeight}:{width:r.width,height:r.height}}function un(r){const e=new OffscreenCanvas(1,1).getContext("2d");e.drawImage(r,0,0);const{data:[i,s,a]}=e.getImageData(0,0,1,1);return[i,s,a]}const fn=r=>{let t=null,e=null,i=r.keyColor,s=null;return async a=>{if((t==null||e==null||s==null)&&(i==null&&(i=un(a)),{cvs:t,gl:e}=hn({...dn(a),keyColor:i,...r}),s=ln(e)),cn(e,a,s),globalThis.VideoFrame!=null&&a instanceof globalThis.VideoFrame){const o=new VideoFrame(t,{alpha:"keep",timestamp:a.timestamp,duration:a.duration??void 0});return a.close(),o}return createImageBitmap(t,{imageOrientation:a instanceof ImageBitmap?"flipY":"none"})}},Je=class Je{constructor(t,e,i,s,a){d(this,ut);d(this,le,new g.EventTool);k(this,"on",n(this,le).on);d(this,he,0);d(this,de,0);d(this,ue,0);d(this,fe,0);d(this,me,0);d(this,ft,null);k(this,"fixedAspectRatio",!1);k(this,"fixedScaleCenter",!1);this.x=t??0,this.y=e??0,this.w=i??0,this.h=s??0,h(this,ft,a??null)}get x(){return n(this,he)}set x(t){L(this,ut,Jt).call(this,"x",t)}get y(){return n(this,de)}set y(t){L(this,ut,Jt).call(this,"y",t)}get w(){return n(this,ue)}set w(t){L(this,ut,Jt).call(this,"w",t)}get h(){return n(this,fe)}set h(t){L(this,ut,Jt).call(this,"h",t)}get angle(){return n(this,me)}set angle(t){L(this,ut,Jt).call(this,"angle",t)}get center(){const{x:t,y:e,w:i,h:s}=this;return{x:t+i/2,y:e+s/2}}clone(){const{x:t,y:e,w:i,h:s}=this,a=new Je(t,e,i,s,n(this,ft));return a.angle=this.angle,a.fixedAspectRatio=this.fixedAspectRatio,a.fixedScaleCenter=this.fixedScaleCenter,a}checkHit(t,e){var y,b;let{angle:i,center:s,x:a,y:o,w:c,h:l}=this;const m=((y=n(this,ft))==null?void 0:y.center)??s,u=((b=n(this,ft))==null?void 0:b.angle)??i;n(this,ft)==null&&(a=a-m.x,o=o-m.y);const w=t-m.x,p=e-m.y;let x=w,f=p;return u!==0&&(x=w*Math.cos(u)+p*Math.sin(u),f=p*Math.cos(u)-w*Math.sin(u)),!(x<a||x>a+c||f<o||f>o+l)}};le=new WeakMap,he=new WeakMap,de=new WeakMap,ue=new WeakMap,fe=new WeakMap,me=new WeakMap,ut=new WeakSet,Jt=function(t,e){const i=this[t]!==e;switch(t){case"x":h(this,he,e);break;case"y":h(this,de,e);break;case"w":h(this,ue,e);break;case"h":h(this,fe,e);break;case"angle":h(this,me,e);break}i&&n(this,le).emit("propsChange",{[t]:e})},ft=new WeakMap;let Te=Je;class di{constructor(){k(this,"rect",new Te);d(this,pe,{offset:0,duration:0,playbackRate:1});d(this,Ft,new g.EventTool);k(this,"on",n(this,Ft).on);d(this,$t,0);k(this,"opacity",1);k(this,"flip",null);d(this,mt,null);d(this,Z,null);k(this,"ready",Promise.resolve());this.rect.on("propsChange",t=>{n(this,Ft).emit("propsChange",{rect:t})})}get time(){return n(this,pe)}set time(t){Object.assign(n(this,pe),t)}get zIndex(){return n(this,$t)}set zIndex(t){const e=n(this,$t)!==t;h(this,$t,t),e&&n(this,Ft).emit("propsChange",{zIndex:t})}_render(t){const{rect:{center:e,angle:i}}=this;t.setTransform(this.flip==="horizontal"?-1:1,0,0,this.flip==="vertical"?-1:1,e.x,e.y),t.rotate((this.flip==null?1:-1)*i),t.globalAlpha=this.opacity}setAnimation(t,e){h(this,mt,Object.entries(t).map(([i,s])=>{const a={from:0,to:100}[i]??Number(i.slice(0,-1));if(isNaN(a)||a>100||a<0)throw Error("keyFrame must between 0~100");return[a/100,s]})),h(this,Z,Object.assign({},n(this,Z),{duration:e.duration,delay:e.delay??0,iterCount:e.iterCount??1/0}))}animate(t){if(n(this,mt)==null||n(this,Z)==null||t<n(this,Z).delay)return;const e=mn(t,n(this,mt),n(this,Z));for(const i in e)switch(i){case"opacity":this.opacity=e[i];break;case"x":case"y":case"w":case"h":case"angle":this.rect[i]=e[i];break}}copyStateTo(t){h(t,mt,n(this,mt)),h(t,Z,n(this,Z)),t.zIndex=this.zIndex,t.opacity=this.opacity,t.flip=this.flip,t.rect=this.rect.clone(),t.time={...this.time}}destroy(){n(this,Ft).destroy()}}pe=new WeakMap,Ft=new WeakMap,$t=new WeakMap,mt=new WeakMap,Z=new WeakMap;function mn(r,t,e){const i=r-e.delay;if(i/e.duration>=e.iterCount)return{};const s=i%e.duration,a=i===e.duration?1:s/e.duration,o=t.findIndex(x=>x[0]>=a);if(o===-1)return{};const c=t[o-1],l=t[o],m=l[1];if(c==null)return m;const u=c[1],w={},p=(a-c[0])/(l[0]-c[0]);for(const x in m){const f=x;u[f]!=null&&(w[f]=(m[f]-u[f])*p+u[f])}return w}const Ye=class Ye extends di{constructor(e){super();d(this,Et);d(this,pt,null);d(this,we,!1);h(this,Et,e),this.ready=e.ready.then(({width:i,height:s,duration:a})=>{this.rect.w=this.rect.w===0?i:this.rect.w,this.rect.h=this.rect.h===0?s:this.rect.h,this.time.duration=this.time.duration===0?a:this.time.duration})}async offscreenRender(e,i){var p;const s=i*this.time.playbackRate;this.animate(s),super._render(e);const{w:a,h:o}=this.rect,{video:c,audio:l,state:m}=await n(this,Et).tick(s);let u=l??[];if(l!=null&&this.time.playbackRate!==1&&(u=l.map(x=>ti(x,this.time.playbackRate))),m==="done")return{audio:u,done:!0};const w=c??n(this,pt);return w!=null&&e.drawImage(w,-a/2,-o/2,a,o),c!=null&&((p=n(this,pt))==null||p.close(),h(this,pt,c)),{audio:u,done:!1}}async clone(){const e=new Ye(await n(this,Et).clone());return await e.ready,this.copyStateTo(e),e}destroy(){var e;n(this,we)||(h(this,we,!0),g.Log.info("OffscreenSprite 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