use portaudio instead of oto

Dockerfile.test

@@ -2,7 +2,7 @@ FROM golang:1.20-buster
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends --no-install-suggests \
-    gcc libgl1-mesa-dev xorg-dev libasound2-dev
+    gcc libgl1-mesa-dev xorg-dev portaudio19-dev
 
 WORKDIR /work
 COPY . .

cmd/rgnes/main.go

@@ -14,7 +14,7 @@ import (
 	"fyne.io/fyne/v2/canvas"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/driver/desktop"
-	"github.com/hajimehoshi/oto"
+	"github.com/gordonklaus/portaudio"
 	"github.com/ichirin2501/rgnes/nes"
 )
 
@@ -56,29 +56,60 @@ func (r *renderer) Refresh() {
 	r.currImg.Refresh()
 }
 
-type player struct {
-	p   *oto.Player
-	buf []byte
+// ref: https://github.com/fogleman/nes/blob/3880f3400500b1ff2e89af4e12e90be46c73ae07/ui/audio.go#L5
+type Player struct {
+	stream         *portaudio.Stream
+	sampleRate     float64
+	outputChannels int
+	channel        chan float32
 }
 
-func newPlayer() (*player, error) {
-	c, err := oto.NewContext(44100, 1, 1, 1)
+func newPlayer() *Player {
+	a := Player{}
+	a.channel = make(chan float32, 44100)
+	return &a
+}
+
+func (a *Player) Start() error {
+	host, err := portaudio.DefaultHostApi()
+	if err != nil {
+		return err
+	}
+	parameters := portaudio.HighLatencyParameters(nil, host.DefaultOutputDevice)
+	stream, err := portaudio.OpenStream(parameters, a.Callback)
 	if err != nil {
-		return nil, err
+		return err
+	}
+	if err := stream.Start(); err != nil {
+		return err
 	}
-	p := c.NewPlayer()
-	return &player{
-		p:   p,
-		buf: make([]byte, 1),
-	}, nil
+	a.stream = stream
+	a.sampleRate = parameters.SampleRate
+	a.outputChannels = parameters.Output.Channels
+	return nil
+}
+
+func (a *Player) Stop() error {
+	return a.stream.Close()
 }
 
-func (p *player) Sample(v float32) {
-	p.buf[0] = byte(v * 0xFF)
-	if _, err := p.p.Write(p.buf); err != nil {
-		fmt.Println("why: ", err)
+func (a *Player) Callback(out []float32) {
+	var output float32
+	for i := range out {
+		if i%a.outputChannels == 0 {
+			select {
+			case sample := <-a.channel:
+				output = sample
+			default:
+				output = 0
+			}
+		}
+		out[i] = output
 	}
 }
+func (a *Player) Sample(v float32) {
+	a.channel <- v
+}
 
 func realMain() error {
 	var (
@@ -94,8 +125,9 @@ func realMain() error {
 
 	canvasImg1 := canvas.NewImageFromImage(img1)
 	canvasImg2 := canvas.NewImageFromImage(img2)
-	canvasImg1.SetMinSize(fyne.NewSize(256, 240))
-	canvasImg2.SetMinSize(fyne.NewSize(256, 240))
+	canvasImg1.SetMinSize(fyne.NewSize(256*2, 240*2))
+	canvasImg2.SetMinSize(fyne.NewSize(256*2, 240*2))
+
 	canvasImg1.ScaleMode = canvas.ImageScalePixels
 	canvasImg2.ScaleMode = canvas.ImageScalePixels
 
@@ -115,10 +147,13 @@ func realMain() error {
 		return err
 	}
 
-	player, err := newPlayer()
-	if err != nil {
+	portaudio.Initialize()
+	defer portaudio.Terminate()
+	player := newPlayer()
+	if err := player.Start(); err != nil {
 		return err
 	}
+	defer player.Stop()
 
 	n := nes.New(mapper, renderer, player)
 	n.PowerUp()

go.mod

@@ -3,28 +3,38 @@ module github.com/ichirin2501/rgnes
 go 1.20
 
 require (
-	fyne.io/fyne/v2 v2.1.4
-	github.com/hajimehoshi/oto v1.0.1
-	github.com/stretchr/testify v1.6.1
+	fyne.io/fyne/v2 v2.4.3
+	github.com/gordonklaus/portaudio v0.0.0-20230709114228-aafa478834f5
+	github.com/stretchr/testify v1.8.4
 )
 
 require (
+	fyne.io/systray v1.10.1-0.20231115130155-104f5ef7839e // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fredbi/uri v0.0.0-20181227131451-3dcfdacbaaf3 // indirect
-	github.com/fsnotify/fsnotify v1.4.9 // indirect
-	github.com/go-gl/gl v0.0.0-20210813123233-e4099ee2221f // indirect
-	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20211024062804-40e447a793be // indirect
-	github.com/godbus/dbus/v5 v5.0.4 // indirect
-	github.com/goki/freetype v0.0.0-20181231101311-fa8a33aabaff // indirect
+	github.com/fredbi/uri v1.0.0 // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/fyne-io/gl-js v0.0.0-20220119005834-d2da28d9ccfe // indirect
+	github.com/fyne-io/glfw-js v0.0.0-20220120001248-ee7290d23504 // indirect
+	github.com/fyne-io/image v0.0.0-20220602074514-4956b0afb3d2 // indirect
+	github.com/go-gl/gl v0.0.0-20211210172815-726fda9656d6 // indirect
+	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20221017161538-93cebf72946b // indirect
+	github.com/go-text/render v0.0.0-20230619120952-35bccb6164b8 // indirect
+	github.com/go-text/typesetting v0.0.0-20230905121921-abdbcca6e0eb // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/gopherjs/gopherjs v1.17.2 // indirect
+	github.com/jsummers/gobmp v0.0.0-20151104160322-e2ba15ffa76e // indirect
+	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/srwiley/oksvg v0.0.0-20200311192757-870daf9aa564 // indirect
-	github.com/srwiley/rasterx v0.0.0-20200120212402-85cb7272f5e9 // indirect
-	github.com/yuin/goldmark v1.3.8 // indirect
-	golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8 // indirect
-	golang.org/x/image v0.0.0-20200430140353-33d19683fad8 // indirect
-	golang.org/x/mobile v0.0.0-20190415191353-3e0bab5405d6 // indirect
-	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
-	golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f // indirect
-	golang.org/x/text v0.3.3 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect
+	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
+	github.com/tevino/abool v1.2.0 // indirect
+	github.com/yuin/goldmark v1.5.5 // indirect
+	golang.org/x/image v0.12.0 // indirect
+	golang.org/x/mobile v0.0.0-20230922142353-e2f452493d57 // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	honnef.co/go/js/dom v0.0.0-20210725211120-f030747120f2 // indirect
 )