diff --git a/src/utils.js b/src/utils.js
index 108a3ab..cb0214f 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -25,3 +25,37 @@ export function replaceAsync (str, re, callback) {
     return strings.join('')
   })
 }
+
+let webpdecoder = null
+
+export function webp2png (data) {
+  return new Promise((resolve, reject) => {
+    const libwebp = require('./vendor/libwebp')
+    const WebPRiffParser = require('./vendor/libwebp-demux').WebPRiffParser
+    const PNGPacker = require('node-png/lib/packer')
+
+    if (!webpdecoder) {
+      webpdecoder = new libwebp.WebPDecoder()
+    }
+
+    let frame = WebPRiffParser(data, 0).frames[0]
+    let width = [0]
+    let height = [0]
+    let decodedData = webpdecoder.WebPDecodeRGBA(
+      data,
+      frame['src_off'], frame['src_size'],
+      width, height
+    )
+
+    let png = new PNGPacker({})
+    let buffers = []
+    png.on('data', (chunk) => {
+      buffers.push(chunk)
+    })
+    png.once('end', () => {
+      let pngData = Buffer.concat(buffers)
+      resolve(pngData)
+    })
+    png.pack(decodedData, width[0], height[0])
+  })
+}
diff --git a/src/vendor/libwebp-demux.js b/src/vendor/libwebp-demux.js
new file mode 100644
index 0000000..58831ce
--- /dev/null
+++ b/src/vendor/libwebp-demux.js
@@ -0,0 +1,116 @@
+/* eslint-disable */
+/*Copyright (c) 2017 Dominik Homberger
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+https://webpjs.appspot.com
+WebPRiffParser dominikhlbg@gmail.com
+*/
+
+function memcmp(data, data_off, str, size) {
+	for(var i=0;i<size;i++)
+		if(data[data_off+i]!=str.charCodeAt(i))
+			return true;
+	return false;
+}
+
+function GetTag(data, data_off) {
+	var str='';
+	for(var i=0;i<4;i++)
+		str +=String.fromCharCode(data[data_off++]);
+	return str;
+}
+
+function GetLE16(data,data_off) {
+  return (data[data_off+0] << 0) | (data[data_off+1] << 8);
+}
+
+function GetLE24(data,data_off) {
+  return ((data[data_off+0] << 0) | (data[data_off+1] << 8) | (data[data_off+2] << 16))>>>0;
+}
+
+function GetLE32(data,data_off) {
+  return ((data[data_off+0] << 0) | (data[data_off+1] << 8) | (data[data_off+2] << 16) | (data[data_off+3] << 24))>>>0;
+}
+
+function WebPRiffParser(src,src_off) {
+
+var imagearray={};var i=0;var alpha_chunk=false;var alpha_size=0; var alpha_offset=0;imagearray['frames']=[];
+	if(memcmp(src,src_off,'RIFF',4)) return;
+	src_off +=4;
+	var riff_size = GetLE32(src, src_off)+8;
+	src_off +=8;
+	
+	while(src_off<src.length) {
+		var fourcc=GetTag(src,src_off);
+		src_off +=4;
+		
+		var payload_size = GetLE32(src, src_off);
+		src_off +=4;
+		var payload_size_padded = payload_size + (payload_size & 1);
+		
+		switch(fourcc) {
+			case "VP8 ":
+			case "VP8L":
+				if(typeof imagearray['frames'][i]==='undefined') imagearray['frames'][i]={};var obj=imagearray['frames'][i];
+				var height=[0];
+				var width=[0];
+				obj['src_off']=alpha_chunk?alpha_offset:src_off-8;
+				obj['src_size']=alpha_size+payload_size+8;
+				//var rgba = webpdecoder.WebPDecodeRGBA(src,(alpha_chunk?alpha_offset:src_off-8),alpha_size+payload_size+8,width,height);
+				//imagearray[i]={'rgba':rgba,'width':width[0],'height':height[0]};
+				i++;
+				if(alpha_chunk) {
+					alpha_chunk=false;
+					alpha_size=0;
+					alpha_offset=0;
+				}
+				break;
+			case "VP8X":
+				var obj=imagearray['header']={};
+				var feature_flags=obj['feature_flags']=src[src_off];
+				var src_off_ =src_off+4;
+				var canvas_width=obj['canvas_width']= 1 + GetLE24(src,src_off_);
+				src_off_ +=3;
+				var canvas_height=obj['canvas_height']= 1 + GetLE24(src,src_off_);
+				src_off_ +=3;
+				break;
+			case "ALPH":
+				alpha_chunk=true;
+				alpha_size=payload_size_padded+8;
+				alpha_offset=src_off-8;
+				break;
+			
+			case "ANIM":
+				var obj=imagearray['header'];
+				var bgcolor=obj['bgcolor']=GetLE32(src,src_off);
+				src_off_ =src_off+4;
+				
+				var loop_count=obj['loop_count']=GetLE16(src,src_off_);
+				src_off_ +=2;
+				break;
+			case "ANMF":
+				var offset_x=0, offset_y=0, width=0, height=0, duration=0, blend=0, dispose=0, temp=0;
+				var obj=imagearray['frames'][i]={};
+				obj['offset_x']=offset_x = 2 * GetLE24(src,src_off); src_off +=3;
+				obj['offset_y']=offset_y = 2 * GetLE24(src,src_off); src_off +=3;
+				obj['width']=width = 1 + GetLE24(src,src_off); src_off +=3;
+				obj['height']=height = 1 + GetLE24(src,src_off); src_off +=3;
+				obj['duration']=duration = GetLE24(src,src_off); src_off +=3;
+				temp = src[src_off++];
+				obj['dispose']=dispose = temp & 1;
+				obj['blend']=blend = (temp >> 1) & 1;
+				break;
+			default:
+		}
+		if(fourcc!="ANMF")
+		src_off+=payload_size_padded;
+	}
+	return imagearray;
+}
+
+module.exports['WebPRiffParser']=WebPRiffParser;
diff --git a/src/vendor/libwebp.js b/src/vendor/libwebp.js
new file mode 100644
index 0000000..2f1e8dd
--- /dev/null
+++ b/src/vendor/libwebp.js
@@ -0,0 +1,161 @@
+/* eslint-disable */
+// Copyright 2011 Google Inc.
+//
+// This code is licensed under the same terms as WebM:
+//  Software License Agreement:  http://www.webmproject.org/license/software/
+//  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
+// -----------------------------------------------------------------------------
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
+// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
+// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+//
+// Copyright 2011-2017 Dominik Homberger
+// Libwebp Javascript / libwebpjs - the libwebp implementation in javascript (v0.6.0)
+//
+// Author: Dominik Homberger (dominik.homberger@gmail.com)
+
+let self = module.exports
+
+function x(F){if(!F)throw Error("assert :P");}function fa(F,L,J){for(var H=0;4>H;H++)if(F[L+H]!=J.charCodeAt(H))return!0;return!1}function I(F,L,J,H,Z){for(var O=0;O<Z;O++)F[L+O]=J[H+O]}function M(F,L,J,H){for(var Z=0;Z<H;Z++)F[L+Z]=J}function V(F){return new Int32Array(F)}function wa(F,L){for(var J=[],H=0;H<F;H++)J.push(new L);return J}function wb(){function F(J,H,Z){for(var O=Z[H],L=0;L<O;L++){J.push(Z.length>H+1?[]:0);if(Z.length<H+1)break;F(J[L],H+1,Z)}}var L=[];F(L,0,[3,11]);return L}
+function Ed(F,L){function J(H,O,F){for(var Z=F[O],ma=0;ma<Z;ma++){H.push(F.length>O+1?[]:new L);if(F.length<O+1)break;J(H[ma],O+1,F)}}var H=[];J(H,0,F);return H}
+module.exports.WebPDecoder=function(){function F(){V(55)}function L(a,b){for(var c=1<<b-1>>>0;a&c;)c>>>=1;return c?(a&c-1)+c:a}function J(a,b,c,d,e){x(!(d%c));do d-=c,a[b+d]=e;while(0<d)}function H(a,b,c,d,e,f){var g=b,h=1<<c,k,l,m=V(16),n=V(16);x(0!=e);x(null!=d);x(null!=a);x(0<c);for(l=0;l<e;++l){if(15<d[l])return 0;++m[d[l]]}if(m[0]==e)return 0;n[1]=0;for(k=1;15>k;++k){if(m[k]>1<<k)return 0;n[k+1]=n[k]+m[k]}for(l=0;l<e;++l)k=d[l],0<d[l]&&(f[n[k]++]=l);if(1==n[15])return d=new O,d.g=0,d.value=f[0],J(a,
+g,1,h,d),h;var r=-1,q=h-1,t=0,v=1,p=1,u,w=1<<c;l=0;k=1;for(e=2;k<=c;++k,e<<=1){p<<=1;v+=p;p-=m[k];if(0>p)return 0;for(;0<m[k];--m[k])d=new O,d.g=k,d.value=f[l++],J(a,g+t,e,w,d),t=L(t,k)}k=c+1;for(e=2;15>=k;++k,e<<=1){p<<=1;v+=p;p-=m[k];if(0>p)return 0;for(;0<m[k];--m[k]){d=new O;if((t&q)!=r){g+=w;r=k;for(u=1<<r-c;15>r;){u-=m[r];if(0>=u)break;++r;u<<=1}u=r-c;w=1<<u;h+=w;r=t&q;a[b+r].g=u+c;a[b+r].value=g-b-r}d.g=k-c;d.value=f[l++];J(a,g+(t>>c),e,w,d);t=L(t,k)}}return v!=2*n[15]-1?0:h}function Z(a,b,
+c,d,e){x(2328>=e);if(512>=e)var f=V(512);else if(f=V(e),null==f)return 0;return H(a,b,c,d,e,f)}function O(){this.value=this.g=0}function Fd(){this.value=this.g=0}function Ub(){this.G=wa(5,O);this.H=V(5);this.jc=this.Qb=this.qb=this.nd=0;this.pd=wa(xb,Fd)}function ma(a,b,c,d){x(null!=a);x(null!=b);x(2147483648>d);a.Ca=254;a.I=0;a.b=-8;a.Ka=0;a.oa=b;a.pa=c;a.Jd=b;a.Yc=c+d;a.Zc=4<=d?c+d-4+1:c;Qa(a)}function na(a,b){for(var c=0;0<b--;)c|=K(a,128)<<b;return c}function ca(a,b){var c=na(a,b);return G(a)?
+-c:c}function cb(a,b,c,d){var e,f=0;x(null!=a);x(null!=b);x(4294967288>d);a.Sb=d;a.Ra=0;a.u=0;a.h=0;4<d&&(d=4);for(e=0;e<d;++e)f+=b[c+e]<<8*e;a.Ra=f;a.bb=d;a.oa=b;a.pa=c}function Vb(a){for(;8<=a.u&&a.bb<a.Sb;)a.Ra>>>=8,a.Ra+=a.oa[a.pa+a.bb]<<ob-8>>>0,++a.bb,a.u-=8;db(a)&&(a.h=1,a.u=0)}function D(a,b){x(0<=b);if(!a.h&&b<=Gd){var c=pb(a)&Hd[b];a.u+=b;Vb(a);return c}a.h=1;return a.u=0}function Wb(){this.b=this.Ca=this.I=0;this.oa=[];this.pa=0;this.Jd=[];this.Yc=0;this.Zc=[];this.Ka=0}function Ra(){this.Ra=
+0;this.oa=[];this.h=this.u=this.bb=this.Sb=this.pa=0}function pb(a){return a.Ra>>>(a.u&ob-1)>>>0}function db(a){x(a.bb<=a.Sb);return a.h||a.bb==a.Sb&&a.u>ob}function qb(a,b){a.u=b;a.h=db(a)}function Sa(a){a.u>=Xb&&(x(a.u>=Xb),Vb(a))}function Qa(a){x(null!=a&&null!=a.oa);a.pa<a.Zc?(a.I=(a.oa[a.pa++]|a.I<<8)>>>0,a.b+=8):(x(null!=a&&null!=a.oa),a.pa<a.Yc?(a.b+=8,a.I=a.oa[a.pa++]|a.I<<8):a.Ka?a.b=0:(a.I<<=8,a.b+=8,a.Ka=1))}function G(a){return na(a,1)}function K(a,b){var c=a.Ca;0>a.b&&Qa(a);var d=a.b,
+e=c*b>>>8,f=(a.I>>>d>e)+0;f?(c-=e,a.I-=e+1<<d>>>0):c=e+1;d=c;for(e=0;256<=d;)e+=8,d>>=8;d=7^e+Id[d];a.b-=d;a.Ca=(c<<d)-1;return f}function ra(a,b,c){a[b+0]=c>>24&255;a[b+1]=c>>16&255;a[b+2]=c>>8&255;a[b+3]=c>>0&255}function Ta(a,b){return a[b+0]<<0|a[b+1]<<8}function Yb(a,b){return Ta(a,b)|a[b+2]<<16}function Ha(a,b){return Ta(a,b)|Ta(a,b+2)<<16}function Zb(a,b){var c=1<<b;x(null!=a);x(0<b);a.X=V(c);if(null==a.X)return 0;a.Mb=32-b;a.Xa=b;return 1}function $b(a,b){x(null!=a);x(null!=b);x(a.Xa==b.Xa);
+I(b.X,0,a.X,0,1<<b.Xa)}function ac(){this.X=[];this.Xa=this.Mb=0}function bc(a,b,c,d){x(null!=c);x(null!=d);var e=c[0],f=d[0];0==e&&(e=(a*f+b/2)/b);0==f&&(f=(b*e+a/2)/a);if(0>=e||0>=f)return 0;c[0]=e;d[0]=f;return 1}function xa(a,b){return a+(1<<b)-1>>>b}function yb(a,b){return((a&4278255360)+(b&4278255360)>>>0&4278255360)+((a&16711935)+(b&16711935)>>>0&16711935)>>>0}function X(a,b){self[b]=function(b,d,e,f,g,h,k){var c;for(c=0;c<g;++c){var m=self[a](h[k+c-1],e,f+c);h[k+c]=yb(b[d+c],m)}}}function Jd(){this.ud=
+this.hd=this.jd=0}function aa(a,b){return(((a^b)&4278124286)>>>1)+(a&b)>>>0}function sa(a){if(0<=a&&256>a)return a;if(0>a)return 0;if(255<a)return 255}function eb(a,b){return sa(a+(a-b+.5>>1))}function Ia(a,b,c){return Math.abs(b-c)-Math.abs(a-c)}function cc(a,b,c,d,e,f,g){d=f[g-1];for(c=0;c<e;++c)f[g+c]=d=yb(a[b+c],d)}function Kd(a,b,c,d,e){var f;for(f=0;f<c;++f){var g=a[b+f],h=g>>8&255,k=g&16711935,k=k+((h<<16)+h),k=k&16711935;d[e+f]=(g&4278255360)+k>>>0}}function dc(a,b){b.jd=a>>0&255;b.hd=a>>
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+this.ya=Array(new Kb);this.L=this.aa=0;this.gd=Ed([4,2],Xa);this.ga=null;this.Fa=[];this.Cc=this.qc=this.P=0;this.Gb=[];this.Uc=0;this.mb=[];this.nb=0;this.rc=[];this.Ga=this.Vc=0}function ga(a,b){return 0>a?0:a>b?b:a}function Oa(){this.T=this.U=this.ka=this.height=this.width=0;this.y=[];this.f=[];this.ea=[];this.Rc=this.fa=this.W=this.N=this.O=0;this.ma="void";this.put="VP8IoPutHook";this.ac="VP8IoSetupHook";this.bc="VP8IoTeardownHook";this.ha=this.Kb=0;this.data=[];this.hb=this.ib=this.da=this.o=
+this.j=this.va=this.v=this.Da=this.ob=this.w=0;this.F=[];this.J=0}function Ce(){var a=new Be;null!=a&&(a.a=0,a.sc="OK",a.cb=0,a.Xb=0,oa||(oa=De));return a}function T(a,b,c){0==a.a&&(a.a=b,a.sc=c,a.cb=0);return 0}function Jc(a,b,c){return 3<=c&&157==a[b+0]&&1==a[b+1]&&42==a[b+2]}function Kc(a,b){if(null==a)return 0;a.a=0;a.sc="OK";if(null==b)return T(a,2,"null VP8Io passed to VP8GetHeaders()");var c=b.data;var d=b.w;var e=b.ha;if(4>e)return T(a,7,"Truncated header.");var f=c[d+0]|c[d+1]<<8|c[d+2]<<
+16;var g=a.Od;g.Rb=!(f&1);g.td=f>>1&7;g.yd=f>>4&1;g.ub=f>>5;if(3<g.td)return T(a,3,"Incorrect keyframe parameters.");if(!g.yd)return T(a,4,"Frame not displayable.");d+=3;e-=3;var h=a.Kc;if(g.Rb){if(7>e)return T(a,7,"cannot parse picture header");if(!Jc(c,d,e))return T(a,3,"Bad code word");h.c=(c[d+4]<<8|c[d+3])&16383;h.Td=c[d+4]>>6;h.i=(c[d+6]<<8|c[d+5])&16383;h.Ud=c[d+6]>>6;d+=7;e-=7;a.za=h.c+15>>4;a.Ub=h.i+15>>4;b.width=h.c;b.height=h.i;b.Da=0;b.j=0;b.v=0;b.va=b.width;b.o=b.height;b.da=0;b.ib=b.width;
+b.hb=b.height;b.U=b.width;b.T=b.height;f=a.Pa;M(f.jb,0,255,f.jb.length);f=a.Qa;x(null!=f);f.Cb=0;f.Bb=0;f.Fb=1;M(f.Zb,0,0,f.Zb.length);M(f.Lb,0,0,f.Lb)}if(g.ub>e)return T(a,7,"bad partition length");f=a.m;ma(f,c,d,g.ub);d+=g.ub;e-=g.ub;g.Rb&&(h.Ld=G(f),h.Kd=G(f));h=a.Qa;var k=a.Pa,l;x(null!=f);x(null!=h);h.Cb=G(f);if(h.Cb){h.Bb=G(f);if(G(f)){h.Fb=G(f);for(l=0;4>l;++l)h.Zb[l]=G(f)?ca(f,7):0;for(l=0;4>l;++l)h.Lb[l]=G(f)?ca(f,6):0}if(h.Bb)for(l=0;3>l;++l)k.jb[l]=G(f)?na(f,8):255}else h.Bb=0;if(f.Ka)return T(a,
+3,"cannot parse segment header");h=a.ed;h.zd=G(f);h.Tb=na(f,6);h.wb=na(f,3);h.Pc=G(f);if(h.Pc&&G(f)){for(k=0;4>k;++k)G(f)&&(h.vd[k]=ca(f,6));for(k=0;4>k;++k)G(f)&&(h.od[k]=ca(f,6))}a.L=0==h.Tb?0:h.zd?1:2;if(f.Ka)return T(a,3,"cannot parse filter header");l=d;var m=e;e=l;d=l+m;h=m;a.Xb=(1<<na(a.m,2))-1;k=a.Xb;if(m<3*k)c=7;else{l+=3*k;h-=3*k;for(m=0;m<k;++m){var n=c[e+0]|c[e+1]<<8|c[e+2]<<16;n>h&&(n=h);ma(a.Jc[+m],c,l,n);l+=n;h-=n;e+=3}ma(a.Jc[+k],c,l,h);c=l<d?0:5}if(0!=c)return T(a,c,"cannot parse partitions");
+l=a.m;c=na(l,7);e=G(l)?ca(l,4):0;d=G(l)?ca(l,4):0;h=G(l)?ca(l,4):0;k=G(l)?ca(l,4):0;l=G(l)?ca(l,4):0;m=a.Qa;for(n=0;4>n;++n){if(m.Cb){var r=m.Zb[n];m.Fb||(r+=c)}else if(0<n){a.pb[n]=a.pb[0];continue}else r=c;var q=a.pb[n];q.Sc[0]=Lb[ga(r+e,127)];q.Sc[1]=Mb[ga(r+0,127)];q.Eb[0]=2*Lb[ga(r+d,127)];q.Eb[1]=101581*Mb[ga(r+h,127)]>>16;8>q.Eb[1]&&(q.Eb[1]=8);q.Qc[0]=Lb[ga(r+k,117)];q.Qc[1]=Mb[ga(r+l,127)];q.lc=r+l}if(!g.Rb)return T(a,4,"Not a key frame.");G(f);g=a.Pa;for(c=0;4>c;++c){for(e=0;8>e;++e)for(d=
+0;3>d;++d)for(h=0;11>h;++h)k=K(f,Ee[c][e][d][h])?na(f,8):Fe[c][e][d][h],g.Wc[c][e].Yb[d][h]=k;for(e=0;17>e;++e)g.Xc[c][e]=g.Wc[c][Ge[e]]}a.kc=G(f);a.kc&&(a.Bd=na(f,8));return a.cb=1}function De(a,b,c,d,e,f,g){var h=b[e].Yb[c];for(c=0;16>e;++e){if(!K(a,h[c+0]))return e;for(;!K(a,h[c+1]);)if(h=b[++e].Yb[0],c=0,16==e)return 16;var k=b[e+1].Yb;if(K(a,h[c+2])){var l=a,m=h,n=c;var r=0;if(K(l,m[n+3]))if(K(l,m[n+6])){h=0;r=K(l,m[n+8]);m=K(l,m[n+9+r]);n=2*r+m;r=0;for(m=He[n];m[h];++h)r+=r+K(l,m[h]);r+=3+(8<<
+n)}else K(l,m[n+7])?(r=7+2*K(l,165),r+=K(l,145)):r=5+K(l,159);else K(l,m[n+4])?r=3+K(l,m[n+5]):r=2;h=k[2]}else r=1,h=k[1];k=g+Ie[e];l=a;0>l.b&&Qa(l);var m=l.b,n=l.Ca>>1,q=n-(l.I>>m)>>31;--l.b;l.Ca+=q;l.Ca|=1;l.I-=(n+1&q)<<m;f[k]=((r^q)-q)*d[(0<e)+0]}return 16}function Lc(a){var b=a.rb[a.sb-1];b.la=0;b.Na=0;M(a.zc,0,0,a.zc.length);a.ja=0}function Je(a,b){for(a.M=0;a.M<a.Va;++a.M){var c=a.Jc[a.M&a.Xb],d=a.m,e=a,f;for(f=0;f<e.za;++f){var g=d;var h=e;var k=h.Ac,l=h.Bc+4*f,m=h.zc,n=h.ya[h.aa+f];h.Qa.Bb?
+n.$b=K(g,h.Pa.jb[0])?2+K(g,h.Pa.jb[2]):K(g,h.Pa.jb[1]):n.$b=0;h.kc&&(n.Ad=K(g,h.Bd));n.Za=!K(g,145)+0;if(n.Za){var r=n.Ob,q=0;for(h=0;4>h;++h){var t=m[0+h];var v;for(v=0;4>v;++v){t=Ke[k[l+v]][t];for(var p=Mc[K(g,t[0])];0<p;)p=Mc[2*p+K(g,t[p])];t=-p;k[l+v]=t}I(r,q,k,l,4);q+=4;m[0+h]=t}}else t=K(g,156)?K(g,128)?1:3:K(g,163)?2:0,n.Ob[0]=t,M(k,l,t,4),M(m,0,t,4);n.Dd=K(g,142)?K(g,114)?K(g,183)?1:3:2:0}if(e.m.Ka)return T(a,7,"Premature end-of-partition0 encountered.");for(;a.ja<a.za;++a.ja){d=a;e=c;g=d.rb[d.sb-
+1];k=d.rb[d.sb+d.ja];f=d.ya[d.aa+d.ja];if(l=d.kc?f.Ad:0)g.la=k.la=0,f.Za||(g.Na=k.Na=0),f.Hc=0,f.Gc=0,f.ia=0;else{var u,w,g=k,k=e,l=d.Pa.Xc,m=d.ya[d.aa+d.ja],n=d.pb[m.$b];h=m.ad;r=0;q=d.rb[d.sb-1];t=v=0;M(h,r,0,384);if(m.Za){var y=0;var A=l[3]}else{p=V(16);var E=g.Na+q.Na;E=oa(k,l[1],E,n.Eb,0,p,0);g.Na=q.Na=(0<E)+0;if(1<E)Nc(p,0,h,r);else{var B=p[0]+3>>3;for(p=0;256>p;p+=16)h[r+p]=B}y=1;A=l[0]}var C=g.la&15;var N=q.la&15;for(p=0;4>p;++p){var z=N&1;for(B=w=0;4>B;++B)E=z+(C&1),E=oa(k,A,E,n.Sc,y,h,r),
+z=E>y,C=C>>1|z<<7,w=w<<2|(3<E?3:1<E?2:0!=h[r+0]),r+=16;C>>=4;N=N>>1|z<<7;v=(v<<8|w)>>>0}A=C;y=N>>4;for(u=0;4>u;u+=2){w=0;C=g.la>>4+u;N=q.la>>4+u;for(p=0;2>p;++p){z=N&1;for(B=0;2>B;++B)E=z+(C&1),E=oa(k,l[2],E,n.Qc,0,h,r),z=0<E,C=C>>1|z<<3,w=w<<2|(3<E?3:1<E?2:0!=h[r+0]),r+=16;C>>=2;N=N>>1|z<<5}t|=w<<4*u;A|=C<<4<<u;y|=(N&240)<<u}g.la=A;q.la=y;m.Hc=v;m.Gc=t;m.ia=t&43690?0:n.ia;l=!(v|t)}0<d.L&&(d.wa[d.Y+d.ja]=d.gd[f.$b][f.Za],d.wa[d.Y+d.ja].La|=!l);if(e.Ka)return T(a,7,"Premature end-of-file encountered.")}Lc(a);
+c=a;d=b;e=1;f=c.D;g=0<c.L&&c.M>=c.zb&&c.M<=c.Va;if(0==c.Aa)a:{f.M=c.M,f.uc=g,Oc(c,f),e=1;w=c.D;f=w.Nb;t=Ya[c.L];g=t*c.R;k=t/2*c.B;p=16*f*c.R;B=8*f*c.B;l=c.sa;m=c.ta-g+p;n=c.qa;h=c.ra-k+B;r=c.Ha;q=c.Ia-k+B;C=w.M;N=0==C;v=C>=c.Va-1;2==c.Aa&&Oc(c,w);if(w.uc)for(E=c,z=E.D.M,x(E.D.uc),w=E.yb;w<E.Hb;++w){var Q=E;y=w;A=z;var S=Q.D,D=S.Nb;u=Q.R;var S=S.wa[S.Y+y],F=Q.sa,H=Q.ta+16*D*u+16*y,J=S.dd,G=S.tc;if(0!=G)if(x(3<=G),1==Q.L)0<y&&Pc(F,H,u,G+4),S.La&&Qc(F,H,u,G),0<A&&Rc(F,H,u,G+4),S.La&&Sc(F,H,u,G);else{var L=
+Q.B,O=Q.qa,P=Q.ra+8*D*L+8*y,R=Q.Ha,Q=Q.Ia+8*D*L+8*y,D=S.ld;0<y&&(Tc(F,H,u,G+4,J,D),Uc(O,P,R,Q,L,G+4,J,D));S.La&&(Vc(F,H,u,G,J,D),Wc(O,P,R,Q,L,G,J,D));0<A&&(Xc(F,H,u,G+4,J,D),Yc(O,P,R,Q,L,G+4,J,D));S.La&&(Zc(F,H,u,G,J,D),$c(O,P,R,Q,L,G,J,D))}}c.ia&&console.warn("todo:DitherRow");if(null!=d.put){w=16*C;C=16*(C+1);N?(d.y=c.sa,d.O=c.ta+p,d.f=c.qa,d.N=c.ra+B,d.ea=c.Ha,d.W=c.Ia+B):(w-=t,d.y=l,d.O=m,d.f=n,d.N=h,d.ea=r,d.W=q);v||(C-=t);C>d.o&&(C=d.o);d.F=null;d.J=null;if(null!=c.Fa&&0<c.Fa.length&&w<C&&(d.J=Le(c,
+d,w,C-w),d.F=c.mb,null==d.F&&0==d.F.length)){e=T(c,3,"Could not decode alpha data.");break a}w<d.j&&(t=d.j-w,w=d.j,x(!(t&1)),d.O+=c.R*t,d.N+=c.B*(t>>1),d.W+=c.B*(t>>1),null!=d.F&&(d.J+=d.width*t));w<C&&(d.O+=d.v,d.N+=d.v>>1,d.W+=d.v>>1,null!=d.F&&(d.J+=d.v),d.ka=w-d.j,d.U=d.va-d.v,d.T=C-w,e=d.put(d))}f+1!=c.Ic||v||(I(c.sa,c.ta-g,l,m+16*c.R,g),I(c.qa,c.ra-k,n,h+8*c.B,k),I(c.Ha,c.Ia-k,r,q+8*c.B,k))}if(!e)return T(a,6,"Output aborted.")}return 1}function Me(a,b){if(null==a)return 0;if(null==b)return T(a,
+2,"NULL VP8Io parameter in VP8Decode().");if(!a.cb&&!Kc(a,b))return 0;x(a.cb);if(null==b.ac||b.ac(b)){b.ob&&(a.L=0);var c=Ya[a.L];2==a.L?(a.yb=0,a.zb=0):(a.yb=b.v-c>>4,a.zb=b.j-c>>4,0>a.yb&&(a.yb=0),0>a.zb&&(a.zb=0));a.Va=b.o+15+c>>4;a.Hb=b.va+15+c>>4;a.Hb>a.za&&(a.Hb=a.za);a.Va>a.Ub&&(a.Va=a.Ub);if(0<a.L){var d=a.ed;for(c=0;4>c;++c){var e;if(a.Qa.Cb){var f=a.Qa.Lb[c];a.Qa.Fb||(f+=d.Tb)}else f=d.Tb;for(e=0;1>=e;++e){var g=a.gd[c][e],h=f;d.Pc&&(h+=d.vd[0],e&&(h+=d.od[0]));h=0>h?0:63<h?63:h;if(0<h){var k=
+h;0<d.wb&&(k=4<d.wb?k>>2:k>>1,k>9-d.wb&&(k=9-d.wb));1>k&&(k=1);g.dd=k;g.tc=2*h+k;g.ld=40<=h?2:15<=h?1:0}else g.tc=0;g.La=e}}}c=0}else T(a,6,"Frame setup failed"),c=a.a;if(c=0==c){if(c){a.$c=0;0<a.Aa||(a.Ic=Ne);b:{c=a.Ic;var k=a.za,d=4*k,l=32*k,m=k+1,n=0<a.L?k*(0<a.Aa?2:1):0,r=(2==a.Aa?2:1)*k;e=3*(16*c+Ya[a.L])/2*l;f=null!=a.Fa&&0<a.Fa.length?a.Kc.c*a.Kc.i:0;g=d+832+e+f;if(g!=g)c=0;else{if(g>a.Vb){a.Vb=0;a.Ec=V(g);a.Fc=0;if(null==a.Ec){c=T(a,1,"no memory during frame initialization.");break b}a.Vb=
+g}g=a.Ec;h=a.Fc;a.Ac=g;a.Bc=h;h+=d;a.Gd=wa(l,Ic);a.Hd=0;a.rb=wa(m+1,Hc);a.sb=1;a.wa=n?wa(n,Xa):null;a.Y=0;a.D.Nb=0;a.D.wa=a.wa;a.D.Y=a.Y;0<a.Aa&&(a.D.Y+=k);x(!0);a.oc=g;a.pc=h;h+=832;a.ya=wa(r,Kb);a.aa=0;a.D.ya=a.ya;a.D.aa=a.aa;2==a.Aa&&(a.D.aa+=k);a.R=16*k;a.B=8*k;l=Ya[a.L];k=l*a.R;l=l/2*a.B;a.sa=g;a.ta=h+k;a.qa=a.sa;a.ra=a.ta+16*c*a.R+l;a.Ha=a.qa;a.Ia=a.ra+8*c*a.B+l;a.$c=0;h+=e;a.mb=f?g:null;a.nb=f?h:null;x(h+f<=a.Fc+a.Vb);Lc(a);M(a.Ac,a.Bc,0,d);c=1}}if(c){b.ka=0;b.y=a.sa;b.O=a.ta;b.f=a.qa;b.N=
+a.ra;b.ea=a.Ha;b.Vd=a.Ia;b.fa=a.R;b.Rc=a.B;b.F=null;b.J=0;if(!ad){for(c=-255;255>=c;++c)bd[255+c]=0>c?-c:c;for(c=-1020;1020>=c;++c)cd[1020+c]=-128>c?-128:127<c?127:c;for(c=-112;112>=c;++c)dd[112+c]=-16>c?-16:15<c?15:c;for(c=-255;510>=c;++c)ed[255+c]=0>c?0:255<c?255:c;ad=1}Nc=Oe;Za=Pe;Nb=Qe;pa=Re;Ob=Se;fd=Te;Xc=Ue;Tc=Ve;Yc=We;Uc=Xe;Zc=Ye;Vc=Ze;$c=$e;Wc=af;Rc=gd;Pc=hd;Sc=bf;Qc=cf;W[0]=df;W[1]=ef;W[2]=ff;W[3]=gf;W[4]=hf;W[5]=jf;W[6]=kf;W[7]=lf;W[8]=mf;W[9]=nf;Y[0]=of;Y[1]=pf;Y[2]=qf;Y[3]=rf;Y[4]=sf;
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+254,255,255,255,255,255,255,255,255]],[[255,251,253,255,255,255,255,255,255,255,255],[252,253,254,255,255,255,255,255,255,255,255],[255,254,255,255,255,255,255,255,255,255,255]],[[255,252,255,255,255,255,255,255,255,255,255],[249,255,254,255,255,255,255,255,255,255,255],[255,255,254,255,255,255,255,255,255,255,255]],[[255,255,253,255,255,255,255,255,255,255,255],[250,255,255,255,255,255,255,255,255,255,255],[255,255,255,255,255,255,255,255,255,255,255]],[[255,255,255,255,255,255,255,255,255,255,255],
+[254,255,255,255,255,255,255,255,255,255,255],[255,255,255,255,255,255,255,255,255,255,255]]]],Ge=[0,1,2,3,6,4,5,6,6,6,6,6,6,6,6,7,0],Nc,Y=[],W=[],ka=[],Za,fd,Nb,pa,Ob,Xc,Tc,Yc,Uc,Zc,Vc,$c,Wc,Rc,Pc,Sc,Qc,re=1,Cc=2,ia=[],za,vc,fc,Fc,P=[];va("UpsampleRgbLinePair",Ga,3);va("UpsampleBgrLinePair",Tb,3);va("UpsampleRgbaLinePair",wd,4);va("UpsampleBgraLinePair",vd,4);va("UpsampleArgbLinePair",ud,4);va("UpsampleRgba4444LinePair",td,2);va("UpsampleRgb565LinePair",sd,2);var Mf=module.exports.UpsampleRgbLinePair,Nf=
+module.exports.UpsampleBgrLinePair,nd=module.exports.UpsampleRgbaLinePair,od=module.exports.UpsampleBgraLinePair,pd=module.exports.UpsampleArgbLinePair,qd=module.exports.UpsampleRgba4444LinePair,Of=module.exports.UpsampleRgb565LinePair,Wa=16,Ba=1<<Wa-1,ta=-227,Eb=482,rd=6,Pf=(256<<rd)-1,jc=0,Yd=V(256),ae=V(256),$d=V(256),Zd=V(256),be=V(Eb-ta),ce=V(Eb-ta);la("YuvToRgbRow",Ga,3);la("YuvToBgrRow",Tb,3);la("YuvToRgbaRow",wd,4);la("YuvToBgraRow",vd,4);la("YuvToArgbRow",ud,4);la("YuvToRgba4444Row",td,2);la("YuvToRgb565Row",sd,2);var zd=[0,4,8,12,128,
+132,136,140,256,260,264,268,384,388,392,396],Ya=[0,2,8],Qf=[8,7,6,4,4,2,2,2,1,1,1,1],Ne=1;this.WebPDecodeRGBA=function(a,b,c,d,e){var f=Ua;var g=new Cf,h=new Cb;g.ba=h;h.S=f;h.width=[h.width];h.height=[h.height];var k=h.width;var l=h.height,m=new Td;if(null==m||null==a)var n=2;else x(null!=m),n=Ad(a,b,c,m.width,m.height,m.Pd,m.Qd,m.format,null);0!=n?k=0:(null!=k&&(k[0]=m.width[0]),null!=l&&(l[0]=m.height[0]),k=1);if(k){h.width=h.width[0];h.height=h.height[0];null!=d&&(d[0]=h.width);null!=e&&(e[0]=
+h.height);b:{d=new Oa;e=new md;e.data=a;e.w=b;e.ha=c;e.kd=1;b=[0];x(null!=e);a=Ad(e.data,e.w,e.ha,null,null,null,b,null,e);(0==a||7==a)&&b[0]&&(a=4);b=a;if(0==b){x(null!=g);d.data=e.data;d.w=e.w+e.offset;d.ha=e.ha-e.offset;d.put=kc;d.ac=gc;d.bc=lc;d.ma=g;if(e.xa){a=Bc();if(null==a){g=1;break b}if(te(a,d)){b=Cd(d.width,d.height,g.Oa,g.ba);if(d=0==b){c:{d=a;d:for(;;){if(null==d){d=0;break c}x(null!=d.s.yc);x(null!=d.s.Ya);x(0<d.s.Wb);c=d.l;x(null!=c);e=c.ma;x(null!=e);if(0!=d.xb){d.ca=e.ba;d.tb=e.tb;
+x(null!=d.ca);if(!hc(e.Oa,c,Va)){d.a=2;break d}if(!Ec(d,c.width))break d;if(c.da)break d;(c.da||hb(d.ca.S))&&Aa();11>d.ca.S||(console.warn("todo:WebPInitConvertARGBToYUV"),null!=d.ca.f.kb.F&&Aa());if(d.Pb&&0<d.s.ua&&null==d.s.vb.X&&!Zb(d.s.vb,d.s.Wa.Xa)){d.a=1;break d}d.xb=0}if(!Jb(d,d.V,d.Ba,d.c,d.i,c.o,ge))break d;e.Dc=d.Ma;d=1;break c}x(0!=d.a);d=0}d=!d}d&&(b=a.a)}else b=a.a}else{a=new Ce;if(null==a){g=1;break b}a.Fa=e.na;a.P=e.P;a.qc=e.Sa;if(Kc(a,d)){if(b=Cd(d.width,d.height,g.Oa,g.ba),0==b){a.Aa=0;
+c=g.Oa;e=a;x(null!=e);if(null!=c){k=c.Md;k=0>k?0:100<k?255:255*k/100;if(0<k){for(l=m=0;4>l;++l)n=e.pb[l],12>n.lc&&(n.ia=k*Qf[0>n.lc?0:n.lc]>>3),m|=n.ia;m&&(console.warn("todo:VP8InitRandom"),e.ia=1)}e.Ga=c.Id;100<e.Ga?e.Ga=100:0>e.Ga&&(e.Ga=0)}Me(a,d)||(b=a.a)}}else b=a.a}0==b&&null!=g.Oa&&g.Oa.fd&&(b=Bd(g.ba))}g=b}f=0!=g?null:11>f?h.f.RGBA.eb:h.f.kb.y}else f=null;return f};var Dd=[3,4,3,4,4,2,2,4,4,4,2,1,1]};