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rtptime: fix time encoding on arm32 (#274) (#277)

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This commit is contained in:
Alessandro Ros
2023-05-08 13:54:51 +02:00
committed by GitHub
parent 49d0d56367
commit 67d4106adc
4 changed files with 27 additions and 11 deletions
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14
pkg/rtptime/decoder.go
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@@ -7,6 +7,14 @@ import (
const negativeThreshold = 0xFFFFFFFF / 2
// avoid an int64 overflow and preserve resolution by splitting division into two parts:
// first add the integer part, then the decimal part.
func multiplyAndDivide(v, m, d time.Duration) time.Duration {
secs := v / d
dec := v % d
return (secs*m + dec*m/d)
}
// Decoder is a RTP timestamp decoder.
type Decoder struct {
clockRate time.Duration
@@ -42,9 +50,5 @@ func (d *Decoder) Decode(ts uint32) time.Duration {
d.overall += time.Duration(diff)
}
// avoid an int64 overflow and preserve resolution by splitting division into two parts:
// first add the integer part, then the decimal part.
secs := d.overall / d.clockRate
dec := d.overall % d.clockRate
return secs*time.Second + dec*time.Second/d.clockRate
return multiplyAndDivide(d.overall, time.Second, d.clockRate)
}