BEEP

chip8/chip8.go

@@ -10,6 +10,7 @@ const graphicsBufferSize = 64 * 32
 type Chip8 struct {
 	addressRegister uint16
 	beepTimer       byte
+	beepRequired    bool
 	drawRequired    bool
 	delayTimer      byte
 	graphics        [graphicsBufferSize]byte
@@ -70,11 +71,22 @@ func (cpu *Chip8) TickTimers() {
 	if cpu.delayTimer > 0 {
 		cpu.delayTimer--
 	}
-	if cpu.beepTimer > 0 {
+	if cpu.beepTimer == 1 {
+		cpu.beepRequired = true
+		cpu.beepTimer--
+	} else if cpu.beepTimer > 1 {
 		cpu.beepTimer--
 	}
 }
 
+func (cpu *Chip8) BeepNeeded() bool {
+	if cpu.beepRequired == true {
+		cpu.beepRequired = false
+		return true
+	}
+	return false
+}
+
 func (cpu *Chip8) zeroIndexOpcodes() {
 	if cpu.opcode == 0x00E0 {
 		// fuck it the gc can do the hard work for us

cmd/web/main.go

@@ -22,7 +22,7 @@ var drawBuf = [64 * 32]byte{}
 var drawNeeded = false
 var graphicsLock sync.Mutex
 var keysLock sync.Mutex
-var window js.Value
+var window, beep js.Value
 var keys [16]byte
 var gameRunning = true
 
@@ -45,10 +45,10 @@ var keyMap = map[int]int{
 	86: 15, // v
 }
 
-var gameMap = map[string]func() []byte {
+var gameMap = map[string]func() []byte{
-	"pong": getPong,
+	"pong":     getPong,
 	"spaceinv": getSpaceInvaders,
-	"tetris": getTetris,
+	"tetris":   getTetris,
 }
 
 func keyEventHandle(event js.Value) {
@@ -81,6 +81,10 @@ func cpuCycle(cpu *chip8.Chip8, c chan int, i int) {
 		cpu.TickTimers()
 		//println("here!")
 	}
+	if cpu.BeepNeeded() {
+		go playSound()
+	}
+
 	c <- 1
 }
 
@@ -95,7 +99,7 @@ func runGame(game []byte) {
 	for gameRunning {
 		c := make(chan int)
 		go timeCycle(c)
-		i ++ 
+		i++
 		go cpuCycle(cpu, c, i)
 		if i > 7 {
 			i = 0
@@ -125,10 +129,17 @@ func changeGame(event js.Value) {
 	}
 }
 
+func playSound() {
+	beep.Call("play")
+	//window.Get("navigator").Call("vibrate", 300)
+}
+
 func main() {
 	println("CHIP8 IS HERE!")
 	window = js.Global()
 
+	beep = window.Get("Audio").New("data:audio/mp3;base64,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")
+
 	window.Call("addEventListener", "keydown", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
 		keyEventHandle(args[0])
 		return nil