fix: audioworklet registerProcessor should expect a constructor not a function (microsoft#1296)

Co-authored-by: saschanaz <[email protected]>

Author: mathe42

baselines/audioworklet.generated.d.ts

@@ -217,6 +217,10 @@ declare var AudioWorkletProcessor: {
     new(): AudioWorkletProcessor;
 };
 
+interface AudioWorkletProcessorImpl extends AudioWorkletProcessor {
+    process(inputs: Float32Array[][], outputs: Float32Array[][], parameters: Record<string, Float32Array>): boolean;
+}
+
 /** This Streams API interface provides a built-in byte length queuing strategy that can be used when constructing streams. */
 interface ByteLengthQueuingStrategy extends QueuingStrategy<ArrayBufferView> {
     readonly highWaterMark: number;
@@ -891,7 +895,7 @@ declare namespace WebAssembly {
 }
 
 interface AudioWorkletProcessorConstructor {
-    (options: any): AudioWorkletProcessor;
+    new (options: any): AudioWorkletProcessorImpl;
 }
 
 interface PerformanceObserverCallback {

inputfiles/addedTypes.jsonc

@@ -338,6 +338,22 @@
     },
     "interfaces": {
         "interface": {
+            "AudioWorkletProcessorImpl": {
+                "name": "AudioWorkletProcessorImpl",
+                "extends": "AudioWorkletProcessor",
+                "methods": {
+                    "method": {
+                        "process": {
+                            "name": "process",
+                            "overrideSignatures": [
+                                "process(inputs: Float32Array[][], outputs: Float32Array[][], parameters: Record<string, Float32Array>): boolean"
+                            ]
+                        }
+                    }
+                },
+                "exposed": "AudioWorklet",
+                "noInterfaceObject": true
+            },
             "BroadcastChannel": {
                 "events": {
                     "event": [

inputfiles/overridingTypes.jsonc

@@ -366,6 +366,11 @@
                 "overrideSignatures": [
                     "new (...params: any[]): HTMLElement"
                 ]
+            },
+            "AudioWorkletProcessorConstructor": {
+                "overrideSignatures": [
+                    "new (options: any): AudioWorkletProcessorImpl"
+                ]
             }
         }
     },

unittests/files/audioworklet/tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "target": "es2020",
+    "lib": ["es2020"],
+    "module": "esnext",
+    "moduleResolution": "node",
+    "strict": true,
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true
+  },
+  "include": [
+    "../../../baselines/audioworklet*",
+    "**/*"
+  ]
+}

unittests/files/audioworklet/usage.ts

@@ -0,0 +1,8 @@
+registerProcessor(
+  "test",
+  class extends AudioWorkletProcessor {
+    process(input: Float32Array[][], output: Float32Array[][], params: { [key: string]: Float32Array }) {
+      return true;
+    }
+  }
+);

unittests/index.js

@@ -8,3 +8,11 @@ for (const filename of await readdir(new URL("files/", import.meta.url))) {
     });
   }
 }
+
+for (const filename of await readdir(new URL("files/audioworklet", import.meta.url))) {
+  if (filename.endsWith(".ts")) {
+    execSync(`npx tsc generated/audioworklet.generated.d.ts unittests/files/audioworklet/${filename} --target es2020 --lib es2020 --types --noEmit`, {
+      stdio: "inherit"
+    });
+  }
+}