go/chip8-emulator
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playing sounds... kinda

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This commit is contained in:
Jairinho 2022-03-01 18:23:28 -03:00
parent c3bc952330
commit 6fbee32542
No known key found for this signature in database
GPG Key ID: 954589B18A21D5B6
5 changed files with 41 additions and 8 deletions
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20
chip8/chip8.go
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@ -1,10 +1,14 @@
package chip8
import (
_ "embed"
"encoding/binary"
"image"
)
//go:embed sound.wav
var Sound []byte
const (
MemorySize = 4096 // 4KB of memory
InstructionSize = 2 // 2 bytes long instructions
@ -21,6 +25,7 @@ const (
)
type KeyPressed func(key uint8) bool
type PlaySound func(sound []byte) func()
type ROM struct {
Name string
@ -38,11 +43,14 @@ type Emulator struct {
ROM ROM // game rom
Display *image.RGBA // display buffer
KeyPressed KeyPressed // input function
PlaySound PlaySound
StopSound func()
}
func NewEmulator(keyPressed KeyPressed) *Emulator {
func NewEmulator(keyPressed KeyPressed, playSound PlaySound) *Emulator {
emulator := new(Emulator)
emulator.KeyPressed = keyPressed
emulator.PlaySound = playSound
emulator.Stack = NewStack()
emulator.Display = image.NewRGBA(image.Rect(0, 0, Width, Height))
emulator.Reset()
@ -93,7 +101,17 @@ func (emulator *Emulator) UpdateTimers() {
emulator.DT -= 1
}
if emulator.ST > 0 {
if emulator.StopSound == nil {
_ = 1
emulator.StopSound = emulator.PlaySound(Sound)
}
emulator.ST -= 1
} else {
if emulator.StopSound != nil {
emulator.StopSound()
emulator.StopSound = nil
}
}
}

BIN
chip8/sound.wav Normal file
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Binary file not shown.

1
go.mod
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@ -10,6 +10,7 @@ require (
require (
github.com/davecgh/go-spew v1.1.0 // indirect
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20210727001814-0db043d8d5be // indirect
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.2 // indirect
github.com/jezek/xgb v0.0.0-20210312150743-0e0f116e1240 // indirect
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect

2
go.sum
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@ -8,7 +8,9 @@ github.com/hajimehoshi/ebiten/v2 v2.2.5 h1:i6NdS6pEi5kgfTh+4XAVCVtCXxjTyxzU1cj1o
github.com/hajimehoshi/ebiten/v2 v2.2.5/go.mod h1:olKl/qqhMBBAm2oI7Zy292nCtE+nitlmYKNF3UpbFn0=
github.com/hajimehoshi/file2byteslice v0.0.0-20210813153925-5340248a8f41/go.mod h1:CqqAHp7Dk/AqQiwuhV1yT2334qbA/tFWQW0MD2dGqUE=
github.com/hajimehoshi/go-mp3 v0.3.2/go.mod h1:qMJj/CSDxx6CGHiZeCgbiq2DSUkbK0UbtXShQcnfyMM=
github.com/hajimehoshi/oto v0.6.1 h1:7cJz/zRQV4aJvMSSRqzN2TImoVVMpE0BCY4nrNJaDOM=
github.com/hajimehoshi/oto v0.6.1/go.mod h1:0QXGEkbuJRohbJaxr7ZQSxnju7hEhseiPx2hrh6raOI=
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.2 h1:DV2DcbY3YLuLB9gI9R1GT9TPOo92lUeWveV8ci1sBLk=
github.com/hajimehoshi/oto/v2 v2.1.0-alpha.2/go.mod h1:rUKQmwMkqmRxe+IAof9+tuYA2ofm8cAWXFmSfzDN8vQ=
github.com/jakecoffman/cp v1.1.0/go.mod h1:JjY/Fp6d8E1CHnu74gWNnU0+b9VzEdUVPoJxg2PsTQg=
github.com/jezek/xgb v0.0.0-20210312150743-0e0f116e1240 h1:dy+DS31tGEGCsZzB45HmJJNHjur8GDgtRNX9U7HnSX4=

26
main.go
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@ -6,6 +6,7 @@ import (
"time"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/audio"
"github.com/tangzero/chip8-emulator/chip8"
)
@ -50,8 +51,9 @@ var KeyMapping = []ebiten.Key{
}
type UI struct {
Emulator *chip8.Emulator
State State
Emulator *chip8.Emulator
State State
AudioContext *audio.Context
}
func (ui *UI) Run() {
@ -85,17 +87,27 @@ func (ui *UI) Layout(outsideWidth, outsideHeight int) (int, int) {
return Width, Height
}
func KeyPressed(key uint8) bool {
func (ui *UI) KeyPressed(key uint8) bool {
return ebiten.IsKeyPressed(KeyMapping[key])
}
func (ui *UI) PlaySound(sound []byte) func() {
player := ui.AudioContext.NewPlayerFromBytes(sound)
player.SetVolume(0.3)
player.Play()
return func() {
player.Pause()
_ = player.Close()
}
}
func main() {
rom := LoadROM()
ui := UI{
Emulator: chip8.NewEmulator(KeyPressed),
State: LoadingState,
}
ui := UI{}
ui.Emulator = chip8.NewEmulator(ui.KeyPressed, ui.PlaySound)
ui.State = LoadingState
ui.AudioContext = audio.NewContext(44100)
ui.Emulator.LoadROM(rom)
ebiten.SetWindowSize(Width, Height)