feat: add WebGPU DAS backend

packages/acoustics-core/das.js

@@ -116,6 +116,37 @@ export function estimateDasWorkload(options) {
   };
 }
 
+export function finalizeDasBands(rawMaps, workload, experiment) {
+  return experiment.frequencyBands.map((band, bandIndex) => {
+    const rawMap = rawMaps[bandIndex];
+    for (let pointIndex = 0; pointIndex < workload.pointCount; pointIndex += 1) {
+      rawMap[pointIndex] /= workload.bandBins[bandIndex].length;
+    }
+    const rawPeak = findPeak(rawMap);
+    const displayMap = Float32Array.from(rawMap);
+    let displayScale = "power";
+    if (experiment.beamforming.normalization === "peak" && rawPeak.value > 0) {
+      displayScale = "normalized";
+      for (let pointIndex = 0; pointIndex < workload.pointCount; pointIndex += 1) {
+        displayMap[pointIndex] /= rawPeak.value;
+      }
+    }
+    return {
+      id: band.id,
+      color: band.color,
+      bins: workload.bandBins[bandIndex],
+      rawMap,
+      displayMap,
+      displayScale,
+      peak: {
+        index: rawPeak.index,
+        position: scanIndexToPosition(rawPeak.index, experiment.scan),
+        rawPower: rawPeak.value,
+      },
+    };
+  });
+}
+
 export async function computeDasMap(options) {
   const {
     channels,
@@ -229,34 +260,7 @@ export async function computeDasMap(options) {
     }
   }
 
-  const bands = experiment.frequencyBands.map((band, bandIndex) => {
-    const rawMap = rawMaps[bandIndex];
-    for (let pointIndex = 0; pointIndex < workload.pointCount; pointIndex += 1) {
-      rawMap[pointIndex] /= workload.bandBins[bandIndex].length;
-    }
-    const rawPeak = findPeak(rawMap);
-    const displayMap = Float32Array.from(rawMap);
-    let displayScale = "power";
-    if (experiment.beamforming.normalization === "peak" && rawPeak.value > 0) {
-      displayScale = "normalized";
-      for (let pointIndex = 0; pointIndex < workload.pointCount; pointIndex += 1) {
-        displayMap[pointIndex] /= rawPeak.value;
-      }
-    }
-    return {
-      id: band.id,
-      color: band.color,
-      bins: workload.bandBins[bandIndex],
-      rawMap,
-      displayMap,
-      displayScale,
-      peak: {
-        index: rawPeak.index,
-        position: scanIndexToPosition(rawPeak.index, experiment.scan),
-        rawPower: rawPeak.value,
-      },
-    };
-  });
+  const bands = finalizeDasBands(rawMaps, workload, experiment);
 
   return {
     backend: "cpu",