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audio/internal/readerdriver: Reduce locked scopes (Linux)

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Updates #1549
This commit is contained in:
Hajime Hoshi 2021-06-05 22:01:52 +09:00
parent 044a0c69a7
commit 85b436b5bb
1 changed files with 7 additions and 4 deletions
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11
audio/internal/readerdriver/driver_unix.go
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@ -454,9 +454,9 @@ func (p *playerImpl) closeImpl() error {
func (p *playerImpl) addBuffer(buf []float32) int { func (p *playerImpl) addBuffer(buf []float32) int {
p.m.Lock() p.m.Lock()
defer p.m.Unlock()
if p.state != playerPlay { if p.state != playerPlay {
p.m.Unlock()
return 0 return 0
} }
@ -466,19 +466,22 @@ func (p *playerImpl) addBuffer(buf []float32) int {
n = len(buf) n = len(buf)
} }
volume := float32(p.volume) volume := float32(p.volume)
src := p.buf[:n*bitDepthInBytes]
p.buf = p.buf[n*bitDepthInBytes:]
p.m.Unlock()
for i := 0; i < n; i++ { for i := 0; i < n; i++ {
var v float32 var v float32
switch bitDepthInBytes { switch bitDepthInBytes {
case 1: case 1:
v8 := p.buf[i] v8 := src[i]
v = float32(v8-(1<<7)) / (1 << 7) v = float32(v8-(1<<7)) / (1 << 7)
case 2: case 2:
v16 := int16(p.buf[2*i]) | (int16(p.buf[2*i+1]) << 8) v16 := int16(src[2*i]) | (int16(src[2*i+1]) << 8)
v = float32(v16) / (1 << 15) v = float32(v16) / (1 << 15)
} }
buf[i] += v * volume buf[i] += v * volume
} }
p.buf = p.buf[n*bitDepthInBytes:]
return n return n
} }