Add 'waitForReady' API

Author: jet2jet

src/main/index.ts

@@ -3,12 +3,14 @@ import * as Constants from './Constants';
 import ISequencer from './ISequencer';
 import ISynthesizer from './ISynthesizer';
 import Synthesizer from './Synthesizer';
+import waitForReady from './waitForReady';
 import AudioWorkletNodeSynthesizer from './AudioWorkletNodeSynthesizer';
 
 export {
 	Constants,
 	ISequencer,
 	ISynthesizer,
 	Synthesizer,
+	waitForReady,
 	AudioWorkletNodeSynthesizer
 };

src/main/registerAudioWorkletProcessor.ts

@@ -1,5 +1,6 @@
 
 import Synthesizer from './Synthesizer';
+import waitForReady from './waitForReady';
 
 import {
 	Constants,
@@ -12,20 +13,7 @@ import {
     ReturnMessageInstance
 } from './MethodMessaging';
 
-const _module: any = AudioWorkletGlobalScope.wasmModule;
-const promiseWasmInitialized = new Promise<void>((resolve) => {
-	if (_module.calledRun) {
-		resolve();
-	} else {
-		const fn: (() => void) | undefined = _module.onRuntimeInitialized;
-		_module.onRuntimeInitialized = () => {
-			resolve();
-			if (fn) {
-				fn();
-			}
-		};
-	}
-});
+const promiseWasmInitialized = waitForReady();
 
 /** Registers processor using Synthesizer for AudioWorklet. */
 export default function registerAudioWorkletProcessor() {

src/main/waitForReady.ts

@@ -0,0 +1,28 @@
+
+/** @internal */
+declare global {
+	var Module: any;
+}
+
+const _module: any = typeof AudioWorkletGlobalScope !== 'undefined' ?
+	AudioWorkletGlobalScope.wasmModule : Module;
+const promiseWasmInitialized = new Promise<void>((resolve) => {
+	if (_module.calledRun) {
+		resolve();
+	} else {
+		const fn: (() => void) | undefined = _module.onRuntimeInitialized;
+		_module.onRuntimeInitialized = () => {
+			resolve();
+			if (fn) {
+				fn();
+			}
+		};
+	}
+});
+
+/**
+ * Returns the Promise object which resolves when the synthesizer engine is ready.
+ */
+export default function waitForReady(): Promise<void> {
+	return promiseWasmInitialized;
+}