func (p *Player) updateSE() error {
if seStream == nil {
return nil
}
if !ebiten.IsKeyPressed(ebiten.KeyP) {
keyState[ebiten.KeyP] = 0
return nil
}
keyState[ebiten.KeyP]++
if keyState[ebiten.KeyP] != 1 {
return nil
}
if sePlayer == nil {
var err error
sePlayer, err = audio.NewPlayer(audioContext, seStream)
if err != nil {
return err
}
}
if sePlayer.IsPlaying() {
return nil
}
if err := sePlayer.Rewind(); err != nil {
return err
}
return sePlayer.Play()
}
func main() {
wavF, err := ebitenutil.OpenFile("_resources/audio/jab.wav")
if err != nil {
log.Fatal(err)
}
oggF, err := ebitenutil.OpenFile("_resources/audio/ragtime.ogg")
if err != nil {
log.Fatal(err)
}
const sampleRate = 22050
const bytesPerSample = 4 // TODO: This should be defined in audio package
audioContext, err = audio.NewContext(sampleRate)
if err != nil {
log.Fatal(err)
}
go func() {
s, err := wav.Decode(audioContext, wavF)
if err != nil {
log.Fatal(err)
return
}
seCh <- s
close(seCh)
}()
go func() {
s, err := vorbis.Decode(audioContext, oggF)
if err != nil {
log.Fatal(err)
return
}
p, err := audio.NewPlayer(audioContext, s)
if err != nil {
log.Fatal(err)
return
}
musicCh <- &Player{
audioPlayer: p,
total: time.Second * time.Duration(s.Size()) / bytesPerSample / sampleRate,
}
close(musicCh)
// TODO: Is this goroutine-safe?
p.Play()
}()
if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Audio (Ebiten Demo)"); err != nil {
log.Fatal(err)
}
if musicPlayer != nil {
if err := musicPlayer.close(); err != nil {
log.Fatal(err)
}
}
}
func update(screen *ebiten.Image) error {
if player == nil {
var err error
player, err = audio.NewPlayer(audioContext, &stream{})
if err != nil {
return err
}
if err := player.Play(); err != nil {
return err
}
}
ebitenutil.DebugPrint(screen, fmt.Sprintf("FPS: %0.2f", ebiten.CurrentFPS()))
if err := audioContext.Update(); err != nil {
return err
}
return nil
}
func update(screen *ebiten.Image) error {
if player == nil {
var err error
player, err = audio.NewPlayer(audioContext, &stream{})
if err != nil {
return err
}
if err := player.Play(); err != nil {
return err
}
}
msg := fmt.Sprintf("FPS: %0.2f\nThis is an example using infinite audio stream.", ebiten.CurrentFPS())
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
return err
}
if err := audioContext.Update(); err != nil {
return err
}
return nil
}
func addNote() error {
size := sampleRate / ebiten.FPS
notes := []float64{freqC, freqD, freqE, freqF, freqG, freqA * 2, freqB * 2}
defer func() {
scoreIndex++
scoreIndex %= len(score)
}()
l := make([]int16, size*30)
r := make([]int16, size*30)
note := score[scoreIndex]
for note == ' ' {
scoreIndex++
scoreIndex %= len(score)
note = score[scoreIndex]
}
freq := 0.0
switch {
case note == 'R':
freq = 0
case note <= 'B':
freq = notes[int(note)+len(notes)-int('C')]
default:
freq = notes[note-'C']
}
vol := 1.0 / 16.0
square(l, vol, freq, 0.25)
square(r, vol, freq, 0.25)
b := toBytes(l, r)
s := &srcStream{bytes.NewReader(b)}
p, err := audio.NewPlayer(audioContext, s)
if err != nil {
return err
}
p.Play()
return nil
}
func main() {
wavF, err := ebitenutil.OpenFile("_resources/audio/jab.wav")
if err != nil {
log.Fatal(err)
}
oggF, err := ebitenutil.OpenFile("_resources/audio/game.ogg")
if err != nil {
log.Fatal(err)
}
// This sample rate doesn't match with wav/ogg's sample rate,
// but decoders adjust them.
const sampleRate = 48000
const bytesPerSample = 4 // TODO: This should be defined in audio package
audioContext, err = audio.NewContext(sampleRate)
if err != nil {
log.Fatal(err)
}
go func() {
s, err := wav.Decode(audioContext, wavF)
if err != nil {
log.Fatal(err)
return
}
b, err := ioutil.ReadAll(s)
if err != nil {
log.Fatal(err)
return
}
seCh <- b
close(seCh)
}()
go func() {
s, err := vorbis.Decode(audioContext, oggF)
if err != nil {
log.Fatal(err)
return
}
p, err := audio.NewPlayer(audioContext, s)
if err != nil {
log.Fatal(err)
return
}
musicCh <- &Player{
audioPlayer: p,
total: time.Second * time.Duration(s.Size()) / bytesPerSample / sampleRate,
}
close(musicCh)
// TODO: Is this goroutine-safe?
if err := p.Play(); err != nil {
log.Fatal(err)
return
}
}()
if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Audio (Ebiten Demo)"); err != nil {
log.Fatal(err)
}
if musicPlayer != nil {
if err := musicPlayer.close(); err != nil {
log.Fatal(err)
}
}
}