2 lines
64 KiB
JavaScript
2 lines
64 KiB
JavaScript
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t.a==ze&&(t.a=e,t.xc=r,t.za=0),0}function ht(t,a){let c=[0],i=0;var u=[0],b=f(fn),s=f(cn);let l=f(nr);if(u="VP8StatusCode",b=f(rr),t==o)return alert("(dec == null)"),0;if(bt(t),a==o)return lt(t,"VP8_STATUS_INVALID_PARAM","null VP8Io passed to VP8GetHeaders()");if(b.data=a.data,b.b=a.b,b.e=a.e,b.b=[b.b],b.e=[b.e],(u=ye(b=[b]))!=ze)return lt(t,u,"Incorrect/incomplete header.");if((b=b[0]).b=b.b[0],b.e=b.e[0],b.ia)return lt(t,Je,"Unexpected lossless format encountered.");if(t.Ga==o&&(g(0==t.ub),t.Ga=b.$,t.G=b.G,t.ub=b.pa),i=b.data,c=b.b+b.offset,u=b.e-b.offset,g(b.e>=b.offset),u[0]<4)return lt(t,$e,"Truncated header.");if(l=i[c+0]|i[c+1]<<8|i[c+2]<<16,(b=t.Ac).fb=!(1&l)+0,b.Jc=l>>1&7,b.Nc=l>>4&1,b.Ra=l>>5,b.Jc>3)return lt(t,"VP8_STATUS_BITSTREAM_ERROR","Incorrect keyframe parameters.");if(!b.Nc)return lt(t,"VP8_STATUS_UNSUPPORTED_FEATURE","Frame not displayable.");if(c+=3,u-=3,s=t.P,b.fb){if(u<7)return lt(t,"VP8_STATUS_NOT_ENOUGH_DATA","cannot parse picture header");if(!(u>=3&&157==i[c+0]&&1==i[c+1]&&42==i[c+2]))return lt(t,"VP8_STATUS_BITSTREAM_ERROR","Bad code word");for(s.l=16383&(i[c+4]<<8|i[c+3]),s.gd=i[c+4]>>6,s.v=16383&(i[c+6]<<8|i[c+5]),s.hd=i[c+6]>>6,c+=7,u-=7,t.Ma=s.l+15>>4,t.hb=s.v+15>>4,a.width=s.l,a.height=s.v,a.I=0,a.Ua=0,a.k=0,a.t=0,a.Ka=a.width,a.K=a.height,a.m=a.width,a.h=a.height,l=t.R,n=0;n<l.Ta.length;++n)l.Ta[n]=255;for(l.z=f(ia),l=t.Ca,g(l!=o),l.pb=0,l.ob=0,l.tb=1,n=0;n<l.Kb.length;++n)l.Kb[n]=0;for(n=0;n<l.Cb.length;++n)l.Cb[n]=0;t.Lb=0}if(b.Ra>u)return lt(t,"VP8_STATUS_NOT_ENOUGH_DATA","bad partition length");l=t.o,P(l,i,c,c+b.Ra),c+=b.Ra,u-=b.Ra,b.fb&&(s.uc=e(l),s.$c=e(l)),s=l;var h=t.Ca;let d=t.R;if(g(s!=o),g(h!=o),h.pb=e(s),h.pb){if(h.ob=e(s),e(s)){var v;for(h.tb=e(s),v=0;v<Yr;++v)h.Kb[v]=e(s)?k(s,7):0;for(v=0;v<Yr;++v)h.Cb[v]=e(s)?k(s,6):0}if(h.ob)for(v=0;v<Jr;++v)d.Ta[v]=e(s)?A(s,8):255}else h.ob=0;if(s.Ab)return lt(t,"VP8_STATUS_BITSTREAM_ERROR","cannot parse segment header");if(s=l,(h=t.ga).Oc=e(s),h.Fb=A(s,6),h.kb=A(s,3),h.oc=e(s),h.oc&&e(s)){for(d=0;d<xr;++d)e(s)&&(h.Lc[d]=k(s,6));for(d=0;d<Qr;++d)e(s)&&(h.Gc[d]=k(s,6))}if(t.A=0==h.Fb?0:h.Oc?1:2,t.A>0)if(t.Ca.pb)for(d=0;d<Yr;++d)v=t.Ca.Cb[d],t.Ca.tb||(v+=h.Fb),t.Zb[d]=v;else t.Zb[0]=h.Fb;if(s.Ab)return lt(t,"VP8_STATUS_BITSTREAM_ERROR","cannot parse filter header");s=i,h=w=c,u=w+u,v=0;let p=0,m=0;if(t.Hb=1<<A(t.o,2),p=t.Hb-1,d=s,u<(v=w+3*p))u="VP8_STATUS_NOT_ENOUGH_DATA";else{for(m=0;m<p;++m){var w=d,y=v+(s[h+0]|s[h+1]<<8|s[h+2]<<16);y>u&&(w=s),P(t.ic[+m],d,v,y),d=w,v=y,h+=3}P(t.ic[+p],d,v,u),u=v<u?"VP8_STATUS_OK":"VP8_STATUS_SUSPENDED"}if("VP8_STATUS_OK"!=u)return lt(t,"VP8_STATUS_BITSTREAM_ERROR","cannot parse partitions");for(p=t.o,u=A(p,7),s=e(p)?k(p,4):0,h=e(p)?k(p,4):0,d=e(p)?k(p,4):0,v=e(p)?k(p,4):0,p=e(p)?k(p,4):0,m=t.Ca,w=0,w=0;w<Yr;++w){if(y=0,m.pb)y=m.Kb[w],m.tb||(y+=u);else{if(w>0){t.yb[w]=t.yb[0];continue}y=u}const e=t.yb[w];e.sc[0]=oa[ut(y+s,127)],e.sc[1]=fa[ut(y+0,127)],e.sb[0]=2*oa[ut(y+h,127)],e.sb[1]=101581*fa[ut(y+d,127)]>>16,e.sb[1]<8&&(e.sb[1]=8),e.qc[0]=oa[ut(y+v,117)],e.qc[1]=fa[ut(y+p,127)]}if(!b.fb)return lt(t,Ye,"Not a key frame.");for(t.Zc=259,e(l),u=t.R,s=0;s<$r;++s)for(h=0;h<Xr;++h)for(d=0;d<Zr;++d)for(v=0;v<tn;++v)r(l,ba[s][h][d][v])&&(u.z[s][h][d][v]=A(l,8));if(t.pc=e(l),t.pc&&(t.Pc=A(l,8)),t.P.uc){if(c-=8,l=0,b.Ra<8||1!=i[c+8-1])return lt(t,Je,"RIFF: Inconsistent extra information.");l=i[c+0]<<0|i[c+1]<<8|i[c+2]<<16,t.fc=l,t.dd=o,t.cd=i[c+3]}return t.za=1}function dt(t,e,n,a,o,f){let c=e[o][n];if(!r(t,c[0]))return 0;for(;;){if(++o,r(t,c[1])){var i;if(r(t,c[2])){if(r(t,c[3]))if(r(t,c[6])){var u;for(i=0,n=r(t,c[8]),c=r(t,c[9+n]),c=2*n+c,n=0,i=la[c],u=0;u<i.length-1;++u)n+=n+r(t,i[u]);n+=3+(8<<c)}else r(t,c[7])?(n=7+2*r(t,165),n+=r(t,145)):n=5+r(t,159);else n=r(t,c[4])?3+r(t,c[5]):2;c=e[sa[o]][2]}else c=e[sa[o]][1],n=1;if(i=ha[o-1],f[f[f.length-1]+i]=(r(t,128)?-n:n)*a[(i>0)+0],16==o||!r(t,c[0]))return o}else c=e[sa[o]][0];if(16==o)return 16}}function vt(t,e){return((16777216*t[0]+65536*t[1]+256*t[2]+1*t[3])*pa&4278190080)>>e}function pt(t,e){let a,f=0;if(t==o)return 0;if(e==o)return lt(t,"VP8_STATUS_INVALID_PARAM","NULL VP8Io parameter in VP8Decode().");if(!t.za&&!ht(t,e))return 0;if(g(t.za),e.Mb&&!e.Mb(e))lt(t,Qe,"Frame setup failed"),a=t.a;else{e.Za&&(t.A=0);const r=ea[t.A];2==t.A?(t.lb=0,t.mb=0):(t.lb=e.t-r>>4,t.mb=e.k-r>>4,t.lb<0&&(t.lb=0),t.mb<0&&(t.mb=0)),t.Ya=e.K+15+r>>4,t.wb=e.Ka+15+r>>4,t.wb>t.Ma&&(t.wb=t.Ma),t.Ya>t.hb&&(t.Ya=t.hb),a=ze}if(f=a==ze){if(f){let r,n;t:{if(t.Ja=0,t.qb){const e=t.rc;if(!WebPWorkerReset(e)){r=lt(t,qe,"thread initialization failed.");break t}e.Qd=t,e.Rd=t.oa.N,e.Ud=FinishRow,t.jb=t.A>0?ra:ra-1}else t.jb=na;r=1}if(!(n=!r)){let e;t:{const r=t.jb,n=t.Ma,a=4*n,f=32*n,c=n+1,i=t.A>0?n*(t.qb?2:1):0,s=rn,l=f*(16*r+parseInt(3*ea[t.A]/2,10)),h=t.Ga!=o?t.P.l*t.P.v:0,v=a+f+c+i+s+384+l+h+ta;if(v!=v)e=0;else{if(v>t.Gb){if(t.ib=0,t.Gb=0,t.ib==o){e=lt(t,"VP8_STATUS_OUT_OF_MEMORY","no memory during frame initialization.");break t}t.Gb=v}t.dc=205,t.Xc=b(205,16*n),t.Sc=b(205,8*n),t.Vc=b(205,8*n),t.M=i?u(ln,i):o,t.Sd=i?0:o,t.oa.ha=0,t.oa.M=t.M,g(0==(s&ta)),t.Ea=b(205,1*s),t.z=-12851,t.H=16*n,t.r=8*n;const f=ea[t.A],p=f*t.H,P=f/2*t.r;t.ca=d(l,205),t.da=+p,t.aa=t.ca,t.ba=t.da+16*r*t.H+P,t.ra=t.aa,t.sa=t.ba+8*r*t.r+P,t.Xb=h?d(h,0):o,t.La=u(hn,c),t.dc=b(Fr,a),e=1}}n=!e}if(n)f=0;else{if(e.width=t.P.l,e.height=t.P.v,e.w=0,e.y=t.ca,e.D=t.da,e.c=t.aa,e.B=t.ba,e.S=t.ra,e.C=t.sa,e.F=t.H,e.Da=t.r,e.p=o,e.q=o,!Un){let t;for(t=-255;t<=255;++t)On[255+t]=t<0?-t:t,Vn[255+t]=On[255+t]>>1;for(t=-1020;t<=1020;++t)In[1020+t]=t<-128?-128:t>127?127:t;for(t=-112;t<=112;++t)_n[112+t]=t<-16?-16:t>15?15:t;for(t=-255;t<=510;++t)Wn[255+t]=t<0?0:t>255?255:t;Un=1}Cn=D,Fn=E,Gn=C,Nn=F,Ln=Z,Hn=tt,zn=nt,qn=at,Kn=et,Jn=rt,Yn=ot,xn=ft,Qn=J,$n=Y,Xn=x,Zn=Q,f=1}}if(f)t:{for(t.d=0;t.d<t.Ya;++t.d){const a=t.ic[t.d&t.Hb-1],u=t,D=u.La[0];for(D.X=0,D.ua=0,l(u.cc,0,Fr,u.cc.length),u.W=(u.A>0&&u.d>=u.mb&&u.d<=u.Ya)+0,t.i=0;t.i<t.Ma;t.i++){var s;const e=t,o=a,u=e.o,l=e.La[0],g=e.La[1+e.i];e.Ca.ob&&(e.Lb=r(u,e.R.Ta[0])?2+r(u,e.R.Ta[2]):0+r(u,e.R.Ta[1])),g.Nb=e.pc?r(u,e.Pc):0;const W=e.dc;W[W.length-1]=0+4*e.i;const D=e.cc;if(e.wa=!r(u,145),e.wa){var h=e.Eb,v=0,p=0;for(p=0;p<4;++p){var P,A=D[p];for(P=0;P<4;++P){const t=ua[W[W[W.length-1]+P]][A];var k=0;do{k=ca[2*k+r(u,t[k])]}while(k>0);A=-k,W[W[W.length-1]+P]=A,h[v]=A,v++}D[p]=A}}else{for(A=r(u,156)?r(u,128)?Hr:Lr:r(u,163)?Nr:Gr,e.Eb[0]=A,k=0;k<4;++k)W[k+W[W.length-1]]=A;for(k=0;k<4;++k)D[k]=A}if(e.Tc=r(u,142)?r(u,114)?r(u,183)?Hr:Lr:Nr:Gr,u.Ab)s=0;else{if(g.Nb)l.X=g.X=0,e.wa||(l.ua=g.ua=0),e.ja=0,e.Oa=0;else{let t=0,r=0;var m=0,w=da;const n=e.yb[e.Lb];var y=e.z;const a=e.La[0],f=d(4,0),c=d(4,0);let u=d(4,0),s=d(4,0),l=0,h=0;var S=0;let v=0,p=0;if(y=b(0,384),e.wa)m=0,w=e.R.z[3];else{const t=d(16,0);var T=g.ua+a.ua;g.ua=a.ua=(dt(o,e.R.z[1],T,n.sb,0,t)>0)+0,m=1,w=e.R.z[0];var R=t,O=y,V=d(16,0),I=0;for(I=0;I<4;++I){var _=R[0+I]+R[12+I],U=R[4+I]+R[8+I],M=R[4+I]-R[8+I],B=R[0+I]-R[12+I];V[0+I]=_+U,V[8+I]=_-U,V[4+I]=B+M,V[12+I]=B-M}for(I=0;I<4;++I){const t=O[O.length-1],e=V[0+4*I]+3;_=e+V[3+4*I],U=V[1+4*I]+V[2+4*I],M=V[1+4*I]-V[2+4*I],B=e-V[3+4*I],O[t+0]=_+U>>3,O[t+16]=B+M>>3,O[t+32]=_-U>>3,O[t+48]=B-M>>3,O[O.length-1]+=64}y[y.length-1]=0}for(u=i(va[15&g.X]),s=i(va[15&a.X]),v=0;v<4;++v){var j=s[v];for(S=0;S<4;++S){var G=dt(o,w,T=j+u[S],n.sc,m,y);u[S]=j=(G>0)+0,c[S]=(0!=y[y[y.length-1]+0])+0,f[S]=(G>1)+0,y[y.length-1]+=16}s[v]=j,h|=vt(c,24-4*v),l|=vt(f,24-4*v)}for(t=vt(u,24),r=vt(s,24),u=i(va[g.X>>4]),s=i(va[a.X>>4]),p=0;p<4;p+=2){for(v=0;v<2;++v){for(j=s[p+v],S=0;S<2;++S)T=j+u[p+S],G=dt(o,e.R.z[2],T,n.qc,0,y),u[p+S]=j=(G>0)+0,c[2*v+S]=(0!=y[y[y.length-1]+0])+0,f[2*v+S]=(G>1)+0,y[y.length-1]+=16;s[p+v]=j}h|=vt(c,8-2*p),l|=vt(f,8-2*p)}t|=vt(u,20),r|=vt(s,20),g.X=t,a.X=r,e.z=y,e.Oa=l+0,e.ja=l|h,g.Nb=!e.ja+0}s=!o.Ab}if(!s){f=lt(t,"VP8_STATUS_NOT_ENOUGH_DATA",`Premature end-of-file encountered.${t.i} ${t.d}`);break t}const E=t,C=E.Ea,F=nn,J=E.Ea,Y=an,x=E.Ea,Q=on;if(E.i>0){var N=0;for(N=-1;N<16;++N)it(C,F+N*en-4,C,F+N*en+12);for(N=-1;N<8;++N)it(J,Y+N*en-4,J,Y+N*en+4),it(x,Q+N*en-4,x,Q+N*en+4)}else{for(N=0;N<16;++N)C[F+N*en-1]=129;for(N=0;N<8;++N)J[Y+N*en-1]=129,x[Q+N*en-1]=129;E.d>0&&(C[F-1-en]=J[Y-1-en]=x[Q-1-en]=129)}const Z=E.Xc,tt=16*+E.i,et=E.Sc,rt=8*+E.i,nt=E.Vc,at=8*+E.i,ot=E.z;let ft=0;if(E.d>0)c(C,F-en,Z,tt,16),c(J,Y-en,et,rt,8),c(x,Q-en,nt,at,8);else if(0==E.i){for(n=0;n<21;++n)C[F-en-1+n]=127;for(n=0;n<9;++n)J[Y-en-1+n]=127;for(n=0;n<9;++n)x[Q-en-1+n]=127}if(E.wa){const t=F-en+16;E.d>0&&(E.i>=E.Ma-1?C[t+0]=C[t+1]=C[t+2]=C[t+3]=Z[tt+15]:c(C,t+0,Z,tt+16,4));for(let e=0;e<4;++e)C[e+t+4*en]=C[e+t+4*en]=C[e+t+8*en]=C[e+t+12*en]=C[e+t+0];for(ft=0;ft<16;ft++){var L=C,H=F+aa[ft];Dn[E.Eb[ft]](L,H),E.Oa&1<<ft?Cn(ot,16*+ft,L,H,0):E.ja&1<<ft&&Gn(ot,16*+ft,L,H)}}else{var z=ct(E,E.Eb[0]);if(En[z](C,F),E.ja)for(ft=0;ft<16;ft++)L=C,H=F+aa[ft],E.Oa&1<<ft?Cn(ot,16*+ft,L,H,0):E.ja&1<<ft&&Gn(ot,16*+ft,L,H)}if(z=ct(E,E.Tc),jn[z](J,Y),jn[z](x,Q),983040&E.ja){const t=E.z;var q=256;983040&E.Oa?Fn(t,q,J,Y):Nn(t,q,J,Y)}if(15728640&E.ja){const t=E.z;q=320,15728640&E.Oa?Fn(t,q,x,Q):Nn(t,q,x,Q)}E.d<E.hb-1&&(c(Z,tt,C,F+15*en,16),c(et,rt,J,Y+7*en,8),c(nt,at,x,Q+7*en,8));const ht=t;if(ht.A>0){const t=ht.M[1+ht.i],e=ht.La[1+ht.i].Nb;let r=ht.Zb[ht.Lb];ht.ga.oc&&(r+=ht.ga.Lc[0],ht.wa&&(r+=ht.ga.Gc[0])),r=r<0?0:r>63?63:r,t.zc=r,ht.ga.kb>0&&(r=ht.ga.kb>4?r>>2:r>>1,r>9-ht.ga.kb&&(r=9-ht.ga.kb)),t.yc=r<1?1:r,t.ab=(!e||ht.wa)+0}var K=0,$=8*ht.Ja*ht.r,X=ht.ca,ut=ht.da+16*ht.i+16*ht.Ja*ht.H,bt=ht.aa,st=ht.ba+8*ht.i+$,pt=ht.ra,Pt=ht.sa+8*ht.i+$;for(K=0;K<16;++K)c(X,ut+K*ht.H,ht.Ea,+nn+K*en,16);for(K=0;K<8;++K)c(bt,st+K*ht.r,ht.Ea,+an+K*en,8),c(pt,Pt+K*ht.r,ht.Ea,+on+K*en,8)}const E=t,C=e;var At=1;const F=E.oa;if(E.qb){const t=E.rc;if(At&=WebPWorkerSync(t),g(t.a==OK),At){if(F.N=C,F.ha=E.Ja,F.d=E.d,F.W=E.W,F.W){const t=F.M;F.M=E.M,E.M=t}WebPWorkerLaunch(t),++E.Ja==E.jb&&(E.Ja=0)}}else{F.d=E.d,F.W=E.W;e:{let t=1;const e=E.oa,r=ea[E.A],n=r*E.H,a=parseInt(r/2)*E.r,f=16*e.ha*E.H,i=8*e.ha*E.r,u=E.ca,b=E.da-n+f,s=E.aa,l=E.ba-a+i,h=E.ra,d=E.sa-a+i,v=0==e.d,p=(e.d>=E.hb-1)+0;var kt=16*e.d;let P=16*(e.d+1);if(e.W){const t=E;let e=0;const r=t.oa.d;for(g(t.oa.W),e=t.lb;e<t.wb;++e){const n=t,a=e,o=r,f=n.oa,c=n.H,i=f.M[1+a],u=n.ca,b=n.da+16*f.ha*c+16*a,s=i.zc,l=i.yc,h=2*s+l;if(0!=s)if(1==n.A)a>0&&$n(u,b,c,h+4),i.ab&&Zn(u,b,c,h),o>0&&Qn(u,b,c,h+4),i.ab&&Xn(u,b,c,h);else{const t=n.r,e=n.aa,r=n.ba+8*f.ha*t+8*a,d=n.ra,v=n.sa+8*f.ha*t+8*a,p=n.Ac.fb?s>=40?2:s>=15?1:0:s>=40?3:s>=20?2:s>=15?1:0;a>0&&(Hn(u,b,c,h+4,l,p),qn(e,r,d,v,t,h+4,l,p)),i.ab&&(Jn(u,b,c,h,l,p),xn(e,r,d,v,t,h,l,p)),o>0&&(Ln(u,b,c,h+4,l,p),zn(e,r,d,v,t,h+4,l,p)),i.ab&&(Kn(u,b,c,h,l,p),Yn(e,r,d,v,t,h,l,p))}}}if(C.put){if(v?(C.y=E.ca,C.D=E.da+f,C.c=E.aa,C.B=E.ba+i,C.S=E.ra,C.C=E.sa+i):(kt-=r,C.y=u,C.D=b,C.c=s,C.B=l,C.S=h,C.C=d),p||(P-=r),P>C.K&&(P=C.K),E.Ga!=o&&kt<P&&(0==kt?(C.p=W(E,kt,P-kt),C.q=0):C.q=W(E,kt,P-kt),C.p==o)){At=lt(E,Je,"Could not decode 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