More scan experimenting

codecs/jxl/Makefile

@@ -1,5 +1,5 @@
 CODEC_URL = https://gitlab.com/wg1/jpeg-xl.git
-CODEC_VERSION = v0.3.3
+CODEC_VERSION = ab7c5e9b6795134377aa4846ceaae2c5bc504f76
 CODEC_DIR = node_modules/jxl
 CODEC_BUILD_ROOT := $(CODEC_DIR)/build
 CODEC_MT_BUILD_DIR := $(CODEC_BUILD_ROOT)/mt

codecs/jxl/enc/jxl_enc.cpp

@@ -18,6 +18,7 @@ struct JXLOptions {
   int epf;
   int nearLossless;
   bool lossyPalette;
+  size_t decodingSpeedTier;
 };
 
 val encode(std::string image, int width, int height, JXLOptions options) {
@@ -35,6 +36,7 @@ val encode(std::string image, int width, int height, JXLOptions options) {
   cparams.epf = options.epf;
   cparams.speed_tier = static_cast<jxl::SpeedTier>(options.speed);
   cparams.near_lossless = options.nearLossless;
+  cparams.decoding_speed_tier = options.decodingSpeedTier;
 
   if (options.lossyPalette) {
     cparams.lossy_palette = true;
@@ -113,6 +115,7 @@ EMSCRIPTEN_BINDINGS(my_module) {
       .field("progressive", &JXLOptions::progressive)
       .field("nearLossless", &JXLOptions::nearLossless)
       .field("lossyPalette", &JXLOptions::lossyPalette)
+      .field("decodingSpeedTier", &JXLOptions::decodingSpeedTier)
       .field("epf", &JXLOptions::epf);
 
   function("encode", &encode);

codecs/jxl/enc/jxl_enc.d.ts

@@ -5,6 +5,7 @@ export interface EncodeOptions {
   epf: number;
   nearLossless: number;
   lossyPalette: boolean;
+  decodingSpeedTier: number;
 }
 
 export interface JXLModule extends EmscriptenWasm.Module {

codecs/jxl/enc/jxl_enc.js

@@ -50,9 +50,9 @@ v.push(p+"}\n");k=Ya(v).apply(null,q);l=b-1;if(!f.hasOwnProperty(n))throw new Oa
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 a:D,s:function(){},u:function(a,b,c,d){return ub(a,b,c,d)}};
 (function(){function a(g){f.asm=g.exports;L=f.asm.E;M--;f.monitorRunDependencies&&f.monitorRunDependencies(M);0==M&&(null!==Ba&&(clearInterval(Ba),Ba=null),N&&(g=N,N=null,g()))}function b(g){a(g.instance)}function c(g){return Fa().then(function(h){return WebAssembly.instantiate(h,d)}).then(g,function(h){z("failed to asynchronously prepare wasm: "+h);C(h)})}var d={a:Ab};M++;f.monitorRunDependencies&&f.monitorRunDependencies(M);if(f.instantiateWasm)try{return f.instantiateWasm(d,a)}catch(g){return z("Module.instantiateWasm callback failed with error: "+

codecs/jxl/enc/jxl_enc_mt.js

@@ -17,7 +17,7 @@ function Da(a){return 2*a.length}function Ea(a,b){for(var c=0,d="";!(c>=b/4);){v
 function Ga(a){for(var b=0,c=0;c<a.length;++c){var d=a.charCodeAt(c);55296<=d&&57343>=d&&++c;b+=4}return b}function Ha(a,b){e().set(a,b)}var n,aa,ba,ca,fa,ha,ia,ka,ma;function u(a){n=a;D.HEAP8=aa=new Int8Array(a);D.HEAP16=ca=new Int16Array(a);D.HEAP32=ha=new Int32Array(a);D.HEAPU8=ba=new Uint8Array(a);D.HEAPU16=fa=new Uint16Array(a);D.HEAPU32=ia=new Uint32Array(a);D.HEAPF32=ka=new Float32Array(a);D.HEAPF64=ma=new Float64Array(a)}var Ia=D.INITIAL_MEMORY||16777216;
 if(G)m=D.wasmMemory,n=D.buffer;else if(D.wasmMemory)m=D.wasmMemory;else if(m=new WebAssembly.Memory({initial:Ia/65536,maximum:32768,shared:!0}),!(m.buffer instanceof SharedArrayBuffer))throw J("requested a shared WebAssembly.Memory but the returned buffer is not a SharedArrayBuffer, indicating that while the browser has SharedArrayBuffer it does not have WebAssembly threads support - you may need to set a flag"),Error("bad memory");m&&(n=m.buffer);Ia=n.byteLength;u(n);var M,Ja=[],Ka=[],La=[],Ma=[];
 function Na(){var a=D.preRun.shift();Ja.unshift(a)}var N=0,Oa=null,Pa=null;D.preloadedImages={};D.preloadedAudios={};function K(a){if(D.onAbort)D.onAbort(a);G&&console.error("Pthread aborting at "+Error().stack);J(a);va=!0;a=new WebAssembly.RuntimeError("abort("+a+"). Build with -s ASSERTIONS=1 for more info.");oa(a);throw a;}function Qa(){var a=O;return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):0===a.indexOf("data:application/octet-stream;base64,")}var O="jxl_enc_mt.wasm";
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+Qa()||(O=qa(O));function Ra(){try{if(ta)return new Uint8Array(ta);if(ra)return ra(O);throw"both async and sync fetching of the wasm failed";}catch(a){K(a)}}function Sa(){return ta||"function"!==typeof fetch?Promise.resolve().then(Ra):fetch(O,{credentials:"same-origin"}).then(function(a){if(!a.ok)throw"failed to load wasm binary file at '"+O+"'";return a.arrayBuffer()}).catch(function(){return Ra()})}var Ua={60485:function(a,b){setTimeout(function(){Ta(a,b)},0)},60563:function(){throw"Canceled!";}};
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 function $a(a,b){if(0>=a||a>e().length||a&1||0>b)return-28;if(0==b)return 0;2147483647<=b&&(b=Infinity);var c=Atomics.load(A(),Q.rb>>2),d=0;if(c==a&&Atomics.compareExchange(A(),Q.rb>>2,c,0)==c&&(--b,d=1,0>=b))return 1;a=Atomics.notify(A(),a>>2,b);if(0<=a)return a+d;throw"Atomics.notify returned an unexpected value "+a;}D._emscripten_futex_wake=$a;
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@@ -77,10 +77,10 @@ r){if("number"!==typeof r&&"boolean"!==typeof r)throw new TypeError('Cannot conv
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 1});A()[b>>2]=d;return 0},Q:lc,z:mc,s:nc,B:function(){Q.Kb()},a:m||D.wasmMemory,D:ib,U:function(a,b,c,d){if("undefined"===typeof SharedArrayBuffer)return J("Current environment does not support SharedArrayBuffer, pthreads are not available!"),6;if(!a)return J("pthread_create called with a null thread pointer!"),28;var f=[];if(G&&0===f.length)return Ec(687865856,a,b,c,d);var g=0,l=0,k=0,q=0;if(b){var t=A()[b>>2];t+=81920;g=A()[b+8>>2];l=0!==A()[b+12>>2];if(0===A()[b+16>>2]){var r=A()[b+20>>2],w=A()[b+
@@ -89,17 +89,16 @@ t,wa(0<g));r=R(232);for(w=0;58>w;++w)C()[(r>>2)+w]=0;A()[a>>2]=r;A()[r+12>>2]=r;
 (function(){function a(f,g){D.asm=f.exports;M=D.asm.Y;ua=g;if(!G){var l=Q.Ma.length;Q.Ma.forEach(function(k){Q.qb(k,function(){if(!--l&&(N--,D.monitorRunDependencies&&D.monitorRunDependencies(N),0==N&&(null!==Oa&&(clearInterval(Oa),Oa=null),Pa))){var q=Pa;Pa=null;q()}})})}}function b(f){a(f.instance,f.module)}function c(f){return Sa().then(function(g){return WebAssembly.instantiate(g,d)}).then(f,function(g){J("failed to asynchronously prepare wasm: "+g);K(g)})}var d={a:Gc};G||(wa(!G,"addRunDependency cannot be used in a pthread worker"),
 N++,D.monitorRunDependencies&&D.monitorRunDependencies(N));if(D.instantiateWasm)try{return D.instantiateWasm(d,a)}catch(f){return J("Module.instantiateWasm callback failed with error: "+f),!1}(function(){return ta||"function"!==typeof WebAssembly.instantiateStreaming||Qa()||"function"!==typeof fetch?c(b):fetch(O,{credentials:"same-origin"}).then(function(f){return WebAssembly.instantiateStreaming(f,d).then(b,function(g){J("wasm streaming compile failed: "+g);J("falling back to ArrayBuffer instantiation");
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-D.___embind_register_native_and_builtin_types=function(){return(D.___embind_register_native_and_builtin_types=D.asm.ca).apply(null,arguments)};D.___em_js__initPthreadsJS=function(){return(D.___em_js__initPthreadsJS=D.asm.da).apply(null,arguments)};
-var oc=D._emscripten_get_global_libc=function(){return(oc=D._emscripten_get_global_libc=D.asm.ea).apply(null,arguments)},Sb=D.stackSave=function(){return(Sb=D.stackSave=D.asm.fa).apply(null,arguments)},gb=D.stackRestore=function(){return(gb=D.stackRestore=D.asm.ga).apply(null,arguments)},Tb=D.stackAlloc=function(){return(Tb=D.stackAlloc=D.asm.ha).apply(null,arguments)},Fc=D._memalign=function(){return(Fc=D._memalign=D.asm.ia).apply(null,arguments)};
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+var Sb=D.stackSave=function(){return(Sb=D.stackSave=D.asm.fa).apply(null,arguments)},gb=D.stackRestore=function(){return(gb=D.stackRestore=D.asm.ga).apply(null,arguments)},Tb=D.stackAlloc=function(){return(Tb=D.stackAlloc=D.asm.ha).apply(null,arguments)},Fc=D._memalign=function(){return(Fc=D._memalign=D.asm.ia).apply(null,arguments)};D._emscripten_main_browser_thread_id=function(){return(D._emscripten_main_browser_thread_id=D.asm.ja).apply(null,arguments)};
+var db=D.___pthread_tsd_run_dtors=function(){return(db=D.___pthread_tsd_run_dtors=D.asm.ka).apply(null,arguments)},eb=D._emscripten_main_thread_process_queued_calls=function(){return(eb=D._emscripten_main_thread_process_queued_calls=D.asm.la).apply(null,arguments)};D._emscripten_current_thread_process_queued_calls=function(){return(D._emscripten_current_thread_process_queued_calls=D.asm.ma).apply(null,arguments)};
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+D._emscripten_sync_run_in_main_thread=function(){return(D._emscripten_sync_run_in_main_thread=D.asm.qa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_0=function(){return(D._emscripten_sync_run_in_main_thread_0=D.asm.ra).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_1=function(){return(D._emscripten_sync_run_in_main_thread_1=D.asm.sa).apply(null,arguments)};
+D._emscripten_sync_run_in_main_thread_2=function(){return(D._emscripten_sync_run_in_main_thread_2=D.asm.ta).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_xprintf_varargs=function(){return(D._emscripten_sync_run_in_main_thread_xprintf_varargs=D.asm.ua).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_3=function(){return(D._emscripten_sync_run_in_main_thread_3=D.asm.va).apply(null,arguments)};
+var Ec=D._emscripten_sync_run_in_main_thread_4=function(){return(Ec=D._emscripten_sync_run_in_main_thread_4=D.asm.wa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_5=function(){return(D._emscripten_sync_run_in_main_thread_5=D.asm.xa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_6=function(){return(D._emscripten_sync_run_in_main_thread_6=D.asm.ya).apply(null,arguments)};
+D._emscripten_sync_run_in_main_thread_7=function(){return(D._emscripten_sync_run_in_main_thread_7=D.asm.za).apply(null,arguments)};var Ub=D._emscripten_run_in_main_runtime_thread_js=function(){return(Ub=D._emscripten_run_in_main_runtime_thread_js=D.asm.Aa).apply(null,arguments)},$b=D.__emscripten_call_on_thread=function(){return($b=D.__emscripten_call_on_thread=D.asm.Ba).apply(null,arguments)};D._emscripten_tls_init=function(){return(D._emscripten_tls_init=D.asm.Ca).apply(null,arguments)};
+D.dynCall_viijii=function(){return(D.dynCall_viijii=D.asm.Da).apply(null,arguments)};D.dynCall_iiji=function(){return(D.dynCall_iiji=D.asm.Ea).apply(null,arguments)};D.dynCall_jiji=function(){return(D.dynCall_jiji=D.asm.Fa).apply(null,arguments)};D.dynCall_iiiiiijj=function(){return(D.dynCall_iiiiiijj=D.asm.Ga).apply(null,arguments)};D.dynCall_iiiiij=function(){return(D.dynCall_iiiiij=D.asm.Ha).apply(null,arguments)};D.dynCall_iiiiijj=function(){return(D.dynCall_iiiiijj=D.asm.Ia).apply(null,arguments)};
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codecs/jxl/enc/jxl_enc_mt_simd.js

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 10];c.zb=A()[b+11];c.tc=A()[b+12];c.uc=A()[b+13];a=Yb(a);!a||c.zb?c=0:(a=a.getContext("webgl",c))?(b=R(8),A()[b+4>>2]=P|0,d={nc:b,attributes:c,version:c.Mb,Za:a},a.canvas&&(a.canvas.$a=d),("undefined"===typeof c.nb||c.nb)&&ec(d),c=b):c=0;return c},O:function(a,b){var c=0;ic().forEach(function(d,f){var g=b+c;f=A()[a+4*f>>2]=g;for(g=0;g<d.length;++g)e()[f++>>0]=d.charCodeAt(g);e()[f>>0]=0;c+=d.length+1});return 0},P:function(a,b){var c=ic();A()[a>>2]=c.length;var d=0;c.forEach(function(f){d+=f.length+
 1});A()[b>>2]=d;return 0},Q:lc,z:mc,s:nc,B:function(){Q.Kb()},a:m||D.wasmMemory,D:ib,U:function(a,b,c,d){if("undefined"===typeof SharedArrayBuffer)return J("Current environment does not support SharedArrayBuffer, pthreads are not available!"),6;if(!a)return J("pthread_create called with a null thread pointer!"),28;var f=[];if(G&&0===f.length)return Ec(687865856,a,b,c,d);var g=0,l=0,k=0,q=0;if(b){var t=A()[b>>2];t+=81920;g=A()[b+8>>2];l=0!==A()[b+12>>2];if(0===A()[b+16>>2]){var r=A()[b+20>>2],w=A()[b+
@@ -90,17 +90,16 @@ t,wa(0<g));r=R(232);for(w=0;58>w;++w)C()[(r>>2)+w]=0;A()[a>>2]=r;A()[r+12>>2]=r;
 (function(){function a(f,g){D.asm=f.exports;M=D.asm.Y;ua=g;if(!G){var l=Q.Ma.length;Q.Ma.forEach(function(k){Q.qb(k,function(){if(!--l&&(N--,D.monitorRunDependencies&&D.monitorRunDependencies(N),0==N&&(null!==Oa&&(clearInterval(Oa),Oa=null),Pa))){var q=Pa;Pa=null;q()}})})}}function b(f){a(f.instance,f.module)}function c(f){return Sa().then(function(g){return WebAssembly.instantiate(g,d)}).then(f,function(g){J("failed to asynchronously prepare wasm: "+g);K(g)})}var d={a:Gc};G||(wa(!G,"addRunDependency cannot be used in a pthread worker"),
 N++,D.monitorRunDependencies&&D.monitorRunDependencies(N));if(D.instantiateWasm)try{return D.instantiateWasm(d,a)}catch(f){return J("Module.instantiateWasm callback failed with error: "+f),!1}(function(){return ta||"function"!==typeof WebAssembly.instantiateStreaming||Qa()||"function"!==typeof fetch?c(b):fetch(O,{credentials:"same-origin"}).then(function(f){return WebAssembly.instantiateStreaming(f,d).then(b,function(g){J("wasm streaming compile failed: "+g);J("falling back to ArrayBuffer instantiation");
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-D.___embind_register_native_and_builtin_types=function(){return(D.___embind_register_native_and_builtin_types=D.asm.ca).apply(null,arguments)};D.___em_js__initPthreadsJS=function(){return(D.___em_js__initPthreadsJS=D.asm.da).apply(null,arguments)};
-var oc=D._emscripten_get_global_libc=function(){return(oc=D._emscripten_get_global_libc=D.asm.ea).apply(null,arguments)},Sb=D.stackSave=function(){return(Sb=D.stackSave=D.asm.fa).apply(null,arguments)},gb=D.stackRestore=function(){return(gb=D.stackRestore=D.asm.ga).apply(null,arguments)},Tb=D.stackAlloc=function(){return(Tb=D.stackAlloc=D.asm.ha).apply(null,arguments)},Fc=D._memalign=function(){return(Fc=D._memalign=D.asm.ia).apply(null,arguments)};
-D._emscripten_main_browser_thread_id=function(){return(D._emscripten_main_browser_thread_id=D.asm.ja).apply(null,arguments)};var db=D.___pthread_tsd_run_dtors=function(){return(db=D.___pthread_tsd_run_dtors=D.asm.ka).apply(null,arguments)},eb=D._emscripten_main_thread_process_queued_calls=function(){return(eb=D._emscripten_main_thread_process_queued_calls=D.asm.la).apply(null,arguments)};
-D._emscripten_current_thread_process_queued_calls=function(){return(D._emscripten_current_thread_process_queued_calls=D.asm.ma).apply(null,arguments)};var bb=D._emscripten_register_main_browser_thread_id=function(){return(bb=D._emscripten_register_main_browser_thread_id=D.asm.na).apply(null,arguments)},Ta=D._do_emscripten_dispatch_to_thread=function(){return(Ta=D._do_emscripten_dispatch_to_thread=D.asm.oa).apply(null,arguments)};
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-D._emscripten_sync_run_in_main_thread_1=function(){return(D._emscripten_sync_run_in_main_thread_1=D.asm.sa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_2=function(){return(D._emscripten_sync_run_in_main_thread_2=D.asm.ta).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_xprintf_varargs=function(){return(D._emscripten_sync_run_in_main_thread_xprintf_varargs=D.asm.ua).apply(null,arguments)};
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-var Ub=D._emscripten_run_in_main_runtime_thread_js=function(){return(Ub=D._emscripten_run_in_main_runtime_thread_js=D.asm.Aa).apply(null,arguments)},$b=D.__emscripten_call_on_thread=function(){return($b=D.__emscripten_call_on_thread=D.asm.Ba).apply(null,arguments)};D._emscripten_tls_init=function(){return(D._emscripten_tls_init=D.asm.Ca).apply(null,arguments)};D.dynCall_viijii=function(){return(D.dynCall_viijii=D.asm.Da).apply(null,arguments)};
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-D.wasmMemory=m;D.ExitStatus=Hc;var Ic;function Hc(a){this.name="ExitStatus";this.message="Program terminated with exit("+a+")";this.status=a}Pa=function Jc(){Ic||Kc();Ic||(Pa=Jc)};
+D.___embind_register_native_and_builtin_types=function(){return(D.___embind_register_native_and_builtin_types=D.asm.ca).apply(null,arguments)};var oc=D._emscripten_get_global_libc=function(){return(oc=D._emscripten_get_global_libc=D.asm.da).apply(null,arguments)};D.___em_js__initPthreadsJS=function(){return(D.___em_js__initPthreadsJS=D.asm.ea).apply(null,arguments)};
+var Sb=D.stackSave=function(){return(Sb=D.stackSave=D.asm.fa).apply(null,arguments)},gb=D.stackRestore=function(){return(gb=D.stackRestore=D.asm.ga).apply(null,arguments)},Tb=D.stackAlloc=function(){return(Tb=D.stackAlloc=D.asm.ha).apply(null,arguments)},Fc=D._memalign=function(){return(Fc=D._memalign=D.asm.ia).apply(null,arguments)};D._emscripten_main_browser_thread_id=function(){return(D._emscripten_main_browser_thread_id=D.asm.ja).apply(null,arguments)};
+var db=D.___pthread_tsd_run_dtors=function(){return(db=D.___pthread_tsd_run_dtors=D.asm.ka).apply(null,arguments)},eb=D._emscripten_main_thread_process_queued_calls=function(){return(eb=D._emscripten_main_thread_process_queued_calls=D.asm.la).apply(null,arguments)};D._emscripten_current_thread_process_queued_calls=function(){return(D._emscripten_current_thread_process_queued_calls=D.asm.ma).apply(null,arguments)};
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+D._emscripten_sync_run_in_main_thread=function(){return(D._emscripten_sync_run_in_main_thread=D.asm.qa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_0=function(){return(D._emscripten_sync_run_in_main_thread_0=D.asm.ra).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_1=function(){return(D._emscripten_sync_run_in_main_thread_1=D.asm.sa).apply(null,arguments)};
+D._emscripten_sync_run_in_main_thread_2=function(){return(D._emscripten_sync_run_in_main_thread_2=D.asm.ta).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_xprintf_varargs=function(){return(D._emscripten_sync_run_in_main_thread_xprintf_varargs=D.asm.ua).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_3=function(){return(D._emscripten_sync_run_in_main_thread_3=D.asm.va).apply(null,arguments)};
+var Ec=D._emscripten_sync_run_in_main_thread_4=function(){return(Ec=D._emscripten_sync_run_in_main_thread_4=D.asm.wa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_5=function(){return(D._emscripten_sync_run_in_main_thread_5=D.asm.xa).apply(null,arguments)};D._emscripten_sync_run_in_main_thread_6=function(){return(D._emscripten_sync_run_in_main_thread_6=D.asm.ya).apply(null,arguments)};
+D._emscripten_sync_run_in_main_thread_7=function(){return(D._emscripten_sync_run_in_main_thread_7=D.asm.za).apply(null,arguments)};var Ub=D._emscripten_run_in_main_runtime_thread_js=function(){return(Ub=D._emscripten_run_in_main_runtime_thread_js=D.asm.Aa).apply(null,arguments)},$b=D.__emscripten_call_on_thread=function(){return($b=D.__emscripten_call_on_thread=D.asm.Ba).apply(null,arguments)};D._emscripten_tls_init=function(){return(D._emscripten_tls_init=D.asm.Ca).apply(null,arguments)};
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codecs/jxl/enc/jxl_node_enc.js

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 g;return 0},a:C,s:function(){},u:function(a,b,c,d){return wb(a,b,c,d)}};
 (function(){function a(g){f.asm=g.exports;K=f.asm.E;L--;f.monitorRunDependencies&&f.monitorRunDependencies(L);0==L&&(null!==Fa&&(clearInterval(Fa),Fa=null),M&&(g=M,M=null,g()))}function b(g){a(g.instance)}function c(g){return Promise.resolve().then(Ia).then(function(h){return WebAssembly.instantiate(h,d)}).then(g,function(h){z("failed to asynchronously prepare wasm: "+h);y(h)})}var d={a:Cb};L++;f.monitorRunDependencies&&f.monitorRunDependencies(L);if(f.instantiateWasm)try{return f.instantiateWasm(d,

codecs/mozjpeg/enc/mozjpeg_enc.cpp

@@ -141,6 +141,7 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
   jpeg_c_set_bool_param(&cinfo, JBOOLEAN_TRELLIS_EOB_OPT, opts.trellis_opt_zero);
   jpeg_c_set_bool_param(&cinfo, JBOOLEAN_TRELLIS_Q_OPT, opts.trellis_opt_table);
   jpeg_c_set_int_param(&cinfo, JINT_TRELLIS_NUM_LOOPS, opts.trellis_loops);
+  jpeg_c_set_int_param(&cinfo, JINT_DC_SCAN_OPT_MODE, 0);
 
   // A little hacky to build a string for this, but it means we can use
   // set_quality_ratings which does some useful heuristic stuff.
@@ -160,7 +161,84 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
   }
 
   if (!opts.baseline && opts.progressive) {
-    jpeg_simple_progression(&cinfo);
+    if (cinfo.jpeg_color_space != JCS_YCbCr) {
+      jpeg_simple_progression(&cinfo);
+    } else {
+      jpeg_c_set_bool_param(&cinfo, JBOOLEAN_OPTIMIZE_SCANS, FALSE);
+      int num_scans = 8;
+      if (cinfo.script_space == NULL || cinfo.script_space_size < num_scans) {
+        cinfo.script_space_size = ((num_scans) > (10) ? (num_scans) : (10));
+        cinfo.script_space = (jpeg_scan_info*)(*cinfo.mem->alloc_small)(
+            (j_common_ptr)&cinfo, JPOOL_PERMANENT,
+            cinfo.script_space_size * sizeof(jpeg_scan_info));
+      }
+      jpeg_scan_info* scanptr = cinfo.script_space;
+      cinfo.scan_info = scanptr;
+      cinfo.num_scans = num_scans;
+
+      // DC scan
+      scanptr->comps_in_scan = 3;
+      for (int ci = 0; ci < 3; ci++) {
+        scanptr->component_index[ci] = ci;
+      }
+      scanptr->Ss = scanptr->Se = scanptr->Ah = scanptr->Al = 0;
+      scanptr++;
+      // Luma progressions
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 0;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 0;
+      scanptr->Al = 2;
+      scanptr++;
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 0;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 2;
+      scanptr->Al = 1;
+      scanptr++;
+      // Chroma almost full
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 2;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 0;
+      scanptr->Al = 1;
+      scanptr++;
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 1;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 0;
+      scanptr->Al = 1;
+      scanptr++;
+      // Luma full
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 0;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 1;
+      scanptr->Al = 0;
+      scanptr++;
+      // Chroma full
+      // TODO: once the decoder is fixed, try this vs full chroma earlier
+      // (as in, just one Chroma pass where it's currently "Chroma almost full")
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 2;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 1;
+      scanptr->Al = 0;
+      scanptr++;
+      scanptr->comps_in_scan = 1;
+      scanptr->component_index[0] = 1;
+      scanptr->Ss = 1;
+      scanptr->Se = 63;
+      scanptr->Ah = 1;
+      scanptr->Al = 0;
+      scanptr++;
+    }
   } else {
     cinfo.num_scans = 0;
     cinfo.scan_info = NULL;

src/features/encoders/jxl/client/index.tsx

@@ -28,6 +28,7 @@ interface State {
   lossless: boolean;
   slightLoss: boolean;
   autoEdgePreservingFilter: boolean;
+  decodingSpeedTier: number;
 }
 
 const maxSpeed = 7;
@@ -53,6 +54,7 @@ export class Options extends Component<Props, State> {
       lossless: options.quality === 100,
       slightLoss: options.lossyPalette,
       autoEdgePreservingFilter: options.epf === -1,
+      decodingSpeedTier: options.decodingSpeedTier,
     };
   }
 
@@ -93,6 +95,7 @@ export class Options extends Component<Props, State> {
             : optionState.edgePreservingFilter,
           nearLossless: 0,
           lossyPalette: optionState.lossless ? optionState.slightLoss : false,
+          decodingSpeedTier: optionState.decodingSpeedTier,
         };
 
         // Updating options, so we don't recalculate in getDerivedStateFromProps.
@@ -117,6 +120,7 @@ export class Options extends Component<Props, State> {
       lossless,
       slightLoss,
       autoEdgePreservingFilter,
+      decodingSpeedTier,
     }: State,
   ) {
     // I'm rendering both lossy and lossless forms, as it becomes much easier when
@@ -185,6 +189,16 @@ export class Options extends Component<Props, State> {
                   </div>
                 )}
               </Expander>
+              <div class={style.optionOneCell}>
+                <Range
+                  min="0"
+                  max="4"
+                  value={decodingSpeedTier}
+                  onInput={this._inputChange('decodingSpeedTier', 'number')}
+                >
+                  Optimise for decoding speed (worse compression):
+                </Range>
+              </div>
             </div>
           )}
         </Expander>

src/features/encoders/jxl/shared/meta.ts

@@ -24,4 +24,5 @@ export const defaultOptions: EncodeOptions = {
   epf: -1,
   nearLossless: 0,
   lossyPalette: false,
+  decodingSpeedTier: 0,
 };