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audio: Use channel num and bytes per sample on OpenAL

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This commit is contained in:
Hajime Hoshi 2016-04-09 01:10:11 +09:00
parent bbdb522b15
commit 2ba5105ba9
1 changed files with 26 additions and 10 deletions
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36
exp/audio/internal/driver/driver_openal.go
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@ -34,21 +34,37 @@ type Player struct {
source io.Reader
sampleRate int
isClosed bool
alFormat uint32
}
func alFormat(channelNum, bytesPerSample int) uint32 {
switch {
case channelNum == 1 && bytesPerSample == 1:
return al.FormatMono8
case channelNum == 1 && bytesPerSample == 2:
return al.FormatMono16
case channelNum == 2 && bytesPerSample == 1:
return al.FormatStereo8
case channelNum == 2 && bytesPerSample == 2:
return al.FormatStereo16
}
panic(fmt.Sprintf("driver: invalid channel num (%d) or bytes per sample (%d)", channelNum, bytesPerSample))
}
func NewPlayer(src io.Reader, sampleRate, channelNum, bytesPerSample int) (*Player, error) {
if e := al.OpenDevice(); e != nil {
return nil, fmt.Errorf("audio: OpenAL initialization failed: %v", e)
return nil, fmt.Errorf("driver: OpenAL initialization failed: %v", e)
}
s := al.GenSources(1)
if err := al.Error(); err != 0 {
return nil, fmt.Errorf("audio: al.GenSources error: %d", err)
return nil, fmt.Errorf("driver: al.GenSources error: %d", err)
}
p := &Player{
alSource: s[0],
alBuffers: []al.Buffer{},
source: src,
sampleRate: sampleRate,
alFormat: alFormat(channelNum, bytesPerSample),
}
runtime.SetFinalizer(p, (*Player).Close)
@ -56,7 +72,7 @@ func NewPlayer(src io.Reader, sampleRate, channelNum, bytesPerSample int) (*Play
emptyBytes := make([]byte, bufferSize)
for _, b := range bs {
// Note that the third argument of only the first buffer is used.
b.BufferData(al.FormatStereo16, emptyBytes, int32(p.sampleRate))
b.BufferData(p.alFormat, emptyBytes, int32(p.sampleRate))
p.alSource.QueueBuffers(b)
}
al.PlaySources(p.alSource)
@ -74,14 +90,14 @@ var (
func (p *Player) Proceed() error {
if err := al.Error(); err != 0 {
return fmt.Errorf("audio: before proceed: %d", err)
return fmt.Errorf("driver: before proceed: %d", err)
}
processedNum := p.alSource.BuffersProcessed()
if 0 < processedNum {
bufs := tmpAlBuffers[:processedNum]
p.alSource.UnqueueBuffers(bufs...)
if err := al.Error(); err != 0 {
return fmt.Errorf("audio: Unqueue in process: %d", err)
return fmt.Errorf("driver: Unqueue in process: %d", err)
}
p.alBuffers = append(p.alBuffers, bufs...)
}
@ -91,10 +107,10 @@ func (p *Player) Proceed() error {
if 0 < n {
buf := p.alBuffers[0]
p.alBuffers = p.alBuffers[1:]
buf.BufferData(al.FormatStereo16, tmpBuffer[:n], int32(p.sampleRate))
buf.BufferData(p.alFormat, tmpBuffer[:n], int32(p.sampleRate))
p.alSource.QueueBuffers(buf)
if err := al.Error(); err != 0 {
return fmt.Errorf("audio: Queue in process: %d", err)
return fmt.Errorf("driver: Queue in process: %d", err)
}
}
if err != nil {
@ -106,7 +122,7 @@ func (p *Player) Proceed() error {
al.RewindSources(p.alSource)
al.PlaySources(p.alSource)
if err := al.Error(); err != 0 {
return fmt.Errorf("audio: PlaySource in process: %d", err)
return fmt.Errorf("driver: PlaySource in process: %d", err)
}
}
@ -115,7 +131,7 @@ func (p *Player) Proceed() error {
func (p *Player) Close() error {
if err := al.Error(); err != 0 {
return fmt.Errorf("audio: error before closing: %d", err)
return fmt.Errorf("driver: error before closing: %d", err)
}
if p.isClosed {
return nil
@ -130,7 +146,7 @@ func (p *Player) Close() error {
}
p.isClosed = true
if err := al.Error(); err != 0 {
return fmt.Errorf("audio: error after closing: %d", err)
return fmt.Errorf("driver: error after closing: %d", err)
}
runtime.SetFinalizer(p, nil)
return nil