JPEG-XL: Better 'effort' and adding noise synth (GoogleChromeLabs#1039)

codecs/jxl/enc/jxl_enc.cpp

@@ -10,15 +10,13 @@ using namespace emscripten;
 thread_local const val Uint8Array = val::global("Uint8Array");
 
 struct JXLOptions {
-  // 1 = slowest
-  // 7 = fastest
-  int speed;
+  int effort;
   float quality;
   bool progressive;
   int epf;
-  int nearLossless;
   bool lossyPalette;
   size_t decodingSpeedTier;
+  float photonNoiseIso;
 };
 
 val encode(std::string image, int width, int height, JXLOptions options) {
@@ -33,11 +31,14 @@ val encode(std::string image, int width, int height, JXLOptions options) {
   pool_ptr = &pool;
 #endif
 
+  size_t st = 10 - options.effort;
+  cparams.speed_tier = jxl::SpeedTier(st);
+
   cparams.epf = options.epf;
-  cparams.speed_tier = static_cast<jxl::SpeedTier>(options.speed);
   cparams.decoding_speed_tier = options.decodingSpeedTier;
+  cparams.photon_noise_iso = options.photonNoiseIso;
 
-  if (options.lossyPalette || options.nearLossless) {
+  if (options.lossyPalette) {
     cparams.lossy_palette = true;
     cparams.palette_colors = 0;
     cparams.options.predictor = jxl::Predictor::Zero;
@@ -106,12 +107,12 @@ val encode(std::string image, int width, int height, JXLOptions options) {
 
 EMSCRIPTEN_BINDINGS(my_module) {
   value_object<JXLOptions>("JXLOptions")
-      .field("speed", &JXLOptions::speed)
+      .field("effort", &JXLOptions::effort)
       .field("quality", &JXLOptions::quality)
       .field("progressive", &JXLOptions::progressive)
-      .field("nearLossless", &JXLOptions::nearLossless)
       .field("lossyPalette", &JXLOptions::lossyPalette)
       .field("decodingSpeedTier", &JXLOptions::decodingSpeedTier)
+      .field("photonNoiseIso", &JXLOptions::photonNoiseIso)
       .field("epf", &JXLOptions::epf);
 
   function("encode", &encode);

codecs/jxl/enc/jxl_enc.d.ts

@@ -1,11 +1,11 @@
 export interface EncodeOptions {
-  speed: number;
+  effort: number;
   quality: number;
   progressive: boolean;
   epf: number;
-  nearLossless: number;
   lossyPalette: boolean;
   decodingSpeedTier: number;
+  photonNoiseIso: number;
 }
 
 export interface JXLModule extends EmscriptenWasm.Module {

src/client/lazy-app/Compress/Options/Range/custom-els/RangeInput/index.ts

@@ -20,7 +20,7 @@ const REFLECTED_ATTRIBUTES = [
   'disabled',
 ];
 
-function getPrescision(value: string): number {
+function getPrecision(value: string): number {
   const afterDecimal = value.split('.')[1];
   return afterDecimal ? afterDecimal.length : 0;
 }
@@ -112,18 +112,24 @@ class RangeInputElement extends HTMLElement {
     this.dispatchEvent(retargetted);
   };
 
+  private _getDisplayValue(value: number): string {
+    if (value >= 10000) return (value / 1000).toFixed(1) + 'k';
+
+    const labelPrecision =
+      Number(this.labelPrecision) || getPrecision(this.step) || 0;
+    return labelPrecision
+      ? value.toFixed(labelPrecision)
+      : Math.round(value).toString();
+  }
+
   private _update = () => {
     // Not connected?
     if (!this._valueDisplay) return;
     const value = Number(this.value) || 0;
     const min = Number(this.min) || 0;
     const max = Number(this.max) || 100;
-    const labelPrecision =
-      Number(this.labelPrecision) || getPrescision(this.step) || 0;
     const percent = (100 * (value - min)) / (max - min);
-    const displayValue = labelPrecision
-      ? value.toFixed(labelPrecision)
-      : Math.round(value).toString();
+    const displayValue = this._getDisplayValue(value);
 
     this._valueDisplay!.textContent = displayValue;
     this.style.setProperty('--value-percent', percent + '%');

src/client/lazy-app/Compress/Options/Range/style.css

@@ -35,7 +35,7 @@
   text-decoration-style: dotted;
   text-decoration-color: var(--main-theme-color);
   text-underline-position: under;
-  width: 48px;
+  width: 54px;
   position: relative;
   left: 5px;
 

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

@@ -29,10 +29,9 @@ interface State {
   slightLoss: boolean;
   autoEdgePreservingFilter: boolean;
   decodingSpeedTier: number;
+  photonNoiseIso: number;
 }
 
-const maxSpeed = 7;
-
 export class Options extends Component<Props, State> {
   static getDerivedStateFromProps(
     props: Props,
@@ -47,14 +46,15 @@ export class Options extends Component<Props, State> {
     // Create default form state from options
     return {
       options,
-      effort: maxSpeed - options.speed,
+      effort: options.effort,
       quality: options.quality,
       progressive: options.progressive,
       edgePreservingFilter: options.epf === -1 ? 2 : options.epf,
       lossless: options.quality === 100,
       slightLoss: options.lossyPalette,
       autoEdgePreservingFilter: options.epf === -1,
       decodingSpeedTier: options.decodingSpeedTier,
+      photonNoiseIso: options.photonNoiseIso,
     };
   }
 
@@ -87,15 +87,15 @@ export class Options extends Component<Props, State> {
         };
 
         const newOptions: EncodeOptions = {
-          speed: maxSpeed - optionState.effort,
+          effort: optionState.effort,
           quality: optionState.lossless ? 100 : optionState.quality,
           progressive: optionState.progressive,
           epf: optionState.autoEdgePreservingFilter
             ? -1
             : optionState.edgePreservingFilter,
-          nearLossless: 0,
           lossyPalette: optionState.lossless ? optionState.slightLoss : false,
           decodingSpeedTier: optionState.decodingSpeedTier,
+          photonNoiseIso: optionState.photonNoiseIso,
         };
 
         // Updating options, so we don't recalculate in getDerivedStateFromProps.
@@ -121,6 +121,7 @@ export class Options extends Component<Props, State> {
       slightLoss,
       autoEdgePreservingFilter,
       decodingSpeedTier,
+      photonNoiseIso,
     }: State,
   ) {
     // I'm rendering both lossy and lossless forms, as it becomes much easier when
@@ -164,7 +165,6 @@ export class Options extends Component<Props, State> {
               <label class={style.optionToggle}>
                 Auto edge filter
                 <Checkbox
-                  name="autoEdgeFilter"
                   checked={autoEdgePreservingFilter}
                   onChange={this._inputChange(
                     'autoEdgePreservingFilter',
@@ -199,6 +199,17 @@ export class Options extends Component<Props, State> {
                   Optimise for decoding speed (worse compression):
                 </Range>
               </div>
+              <div class={style.optionOneCell}>
+                <Range
+                  min="0"
+                  max="50000"
+                  step="100"
+                  value={photonNoiseIso}
+                  onInput={this._inputChange('photonNoiseIso', 'number')}
+                >
+                  Noise equivalent to ISO:
+                </Range>
+              </div>
             </div>
           )}
         </Expander>
@@ -212,8 +223,8 @@ export class Options extends Component<Props, State> {
         </label>
         <div class={style.optionOneCell}>
           <Range
-            min="0"
-            max={maxSpeed - 1}
+            min="3"
+            max="9"
             value={effort}
             onInput={this._inputChange('effort', 'number')}
           >

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

@@ -18,11 +18,11 @@ export const label = 'JPEG XL (beta)';
 export const mimeType = 'image/jxl';
 export const extension = 'jxl';
 export const defaultOptions: EncodeOptions = {
-  speed: 4,
+  effort: 7,
   quality: 75,
   progressive: false,
   epf: -1,
-  nearLossless: 0,
   lossyPalette: false,
   decodingSpeedTier: 0,
+  photonNoiseIso: 0,
 };