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Make int16->uint16 conversion more accurate

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bloeys
2022-06-26 20:04:06 +04:00
parent aa751bbedd
commit 8f19e800f1
1 changed files with 9 additions and 3 deletions
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12
wavy.go
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@ -561,11 +561,17 @@ func F32ToUnsignedPCM16(fs []float32) []byte {
//Remap [-1,1]->[-32768, 32767], then re-interprets the int16 as a uint16. //Remap [-1,1]->[-32768, 32767], then re-interprets the int16 as a uint16.
//With this, the negative values are mapped into the higher half of the uint16 range, //With this, the negative values are mapped into the higher half of the uint16 range,
//while positive values remain unchanged //while positive values remain unchanged
x16 := uint16(fs[i] * math.MaxInt16) x := fs[i]
var u16 uint16
if x < 0 {
u16 = uint16(x * -math.MinInt16)
} else {
u16 = uint16(x * math.MaxInt16)
}
baseIndex := i * 2 baseIndex := i * 2
outBuf[baseIndex] = byte(x16 >> 0) outBuf[baseIndex] = byte(u16 >> 0)
outBuf[baseIndex+1] = byte(x16 >> 8) outBuf[baseIndex+1] = byte(u16 >> 8)
} }
return outBuf return outBuf