Add sounds (only simulator for now)

sim/state/sounds.ts

@@ -0,0 +1,33 @@
+
+namespace pxsim.music {
+    export function fromWAV(buf: RefBuffer) {
+        return incr(buf)
+    }
+}
+
+namespace pxsim.SoundMethods {
+
+    export function buffer(buf: RefBuffer) {
+        return incr(buf)
+    }
+
+    export function uint8ArrayToString(input: Uint8Array) {
+        let len = input.length;
+        let res = ""
+        for (let i = 0; i < len; ++i)
+            res += String.fromCharCode(input[i]);
+        return res;
+    }
+
+    export function play(buf: RefBuffer, volume: number) {
+        return new Promise<void>(resolve => {
+            let url = "data:audio/wav;base64," + btoa(uint8ArrayToString(buf.data))
+            let audio = new Audio(url)
+            audio.onended = () => {
+                resolve()
+            }
+            audio.play()
+        })
+    }
+}
+