Fix nested worker randomly shutting off in Firefox (closes #435)

packages/aac-encoder/src/encode.worker.ts

@@ -192,3 +192,7 @@ if (parentPort) {
 } else {
 	self.addEventListener('message', event => onMessage(event.data as { id: number; command: WorkerCommand }));
 }
+
+// Prevents the worker for being randomly closed by Firefox
+// https://github.com/Vanilagy/mediabunny/issues/435
+setInterval(() => {}, 1000);

packages/ac3/src/codec.worker.ts

@@ -304,3 +304,7 @@ if (parentPort) {
 } else {
 	self.addEventListener('message', event => onMessage(event.data as { id: number; command: WorkerCommand }));
 }
+
+// Prevents the worker for being randomly closed by Firefox
+// https://github.com/Vanilagy/mediabunny/issues/435
+setInterval(() => {}, 1000);

packages/ac3/src/worker-client.ts

@@ -46,6 +46,7 @@ export const unrefWorker = async () => {
 		if (worker) {
 			if (worker.unref) {
 				worker.unref(); // If we don't do this, then the Node process never terminates by itself
+				// Keep the worker around tho
 			} else if (typeof window === 'undefined') {
 				// Non-browser environment without unref - terminate instead
 				worker.terminate();

packages/flac-encoder/src/encode.worker.ts

@@ -192,3 +192,7 @@ if (parentPort) {
 } else {
 	self.addEventListener('message', event => onMessage(event.data as { id: number; command: WorkerCommand }));
 }
+
+// Prevents the worker for being randomly closed by Firefox
+// https://github.com/Vanilagy/mediabunny/issues/435
+setInterval(() => {}, 1000);

packages/mp3-encoder/src/encode.worker.ts

@@ -219,3 +219,7 @@ if (parentPort) {
 } else {
 	self.addEventListener('message', event => onMessage(event.data as { id: number; command: WorkerCommand }));
 }
+
+// Prevents the worker for being randomly closed by Firefox
+// https://github.com/Vanilagy/mediabunny/issues/435
+setInterval(() => {}, 1000);