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audio: Reduce 'make' for performance (#183)

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This commit is contained in:
Hajime Hoshi 2016-03-13 23:13:50 +09:00
parent 8b8eb855a7
commit f07702746c
1 changed files with 12 additions and 5 deletions
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17
exp/audio/audio_openal.go
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@ -29,6 +29,7 @@ const (
maxBufferNum = 8 maxBufferNum = 8
) )
// TODO: This should be in player
var totalBufferNum = 0 var totalBufferNum = 0
type player struct { type player struct {
@ -60,7 +61,14 @@ func startPlaying(src io.Reader, sampleRate int) (*player, error) {
return p, nil return p, nil
} }
const bufferSize = 1024 const (
bufferSize = 1024
)
var (
tmpBuffer = make([]byte, bufferSize)
tmpAlBuffers = make([]al.Buffer, maxBufferNum)
)
func (p *player) proceed() error { func (p *player) proceed() error {
if err := al.Error(); err != 0 { if err := al.Error(); err != 0 {
@ -68,7 +76,7 @@ func (p *player) proceed() error {
} }
processedNum := p.alSource.BuffersProcessed() processedNum := p.alSource.BuffersProcessed()
if 0 < processedNum { if 0 < processedNum {
bufs := make([]al.Buffer, processedNum) bufs := tmpAlBuffers[:processedNum]
p.alSource.UnqueueBuffers(bufs...) p.alSource.UnqueueBuffers(bufs...)
if err := al.Error(); err != 0 { if err := al.Error(); err != 0 {
panic(fmt.Sprintf("audio: Unqueue in process: %d", err)) panic(fmt.Sprintf("audio: Unqueue in process: %d", err))
@ -77,12 +85,11 @@ func (p *player) proceed() error {
} }
for 0 < len(p.alBuffers) { for 0 < len(p.alBuffers) {
b := make([]byte, bufferSize) n, err := p.source.Read(tmpBuffer)
n, err := p.source.Read(b)
if 0 < n { if 0 < n {
buf := p.alBuffers[0] buf := p.alBuffers[0]
p.alBuffers = p.alBuffers[1:] p.alBuffers = p.alBuffers[1:]
buf.BufferData(al.FormatStereo16, b[:n], int32(p.sampleRate)) buf.BufferData(al.FormatStereo16, tmpBuffer[:n], int32(p.sampleRate))
p.alSource.QueueBuffers(buf) p.alSource.QueueBuffers(buf)
if err := al.Error(); err != 0 { if err := al.Error(); err != 0 {
panic(fmt.Sprintf("audio: Queue in process: %d", err)) panic(fmt.Sprintf("audio: Queue in process: %d", err))