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improve performance

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This commit is contained in:
aler9
2023-08-15 00:25:39 +02:00
committed by Alessandro Ros
parent 9bcb05f099
commit 9f19892c23
2 changed files with 7 additions and 18 deletions
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7
pkg/rtpreorderer/reorderer.go
View File

@@ -7,7 +7,6 @@ import (
const ( const (
bufferSize = 64 bufferSize = 64
negativeThreshold = 0xFFFF / 2
) )
// Reorderer filters incoming RTP packets, in order to // Reorderer filters incoming RTP packets, in order to
@@ -37,12 +36,12 @@ func (r *Reorderer) Process(pkt *rtp.Packet) ([]*rtp.Packet, int) {
return []*rtp.Packet{pkt}, 0 return []*rtp.Packet{pkt}, 0
} }
relPos := pkt.SequenceNumber - r.expectedSeqNum relPos := int16(pkt.SequenceNumber - r.expectedSeqNum)
// packet is a duplicate or has been sent // packet is a duplicate or has been sent
// before the first packet processed by Reorderer. // before the first packet processed by Reorderer.
// discard. // discard.
if relPos > negativeThreshold { if relPos < 0 {
r.negativeCount++ r.negativeCount++
// stream has been resetted, therefore reset reorderer too // stream has been resetted, therefore reset reorderer too
@@ -94,7 +93,7 @@ func (r *Reorderer) Process(pkt *rtp.Packet) ([]*rtp.Packet, int) {
// there's a missing packet // there's a missing packet
if relPos != 0 { if relPos != 0 {
p := (r.absPos + relPos) & (bufferSize - 1) p := (r.absPos + uint16(relPos)) & (bufferSize - 1)
// current packet is a duplicate. discard // current packet is a duplicate. discard
if r.buffer[p] != nil { if r.buffer[p] != nil {

12
pkg/rtptime/decoder.go
View File

@@ -5,8 +5,6 @@ import (
"time" "time"
) )
const negativeThreshold = 0xFFFFFFFF / 2
// avoid an int64 overflow and preserve resolution by splitting division into two parts: // avoid an int64 overflow and preserve resolution by splitting division into two parts:
// first add the integer part, then the decimal part. // first add the integer part, then the decimal part.
func multiplyAndDivide(v, m, d time.Duration) time.Duration { func multiplyAndDivide(v, m, d time.Duration) time.Duration {
@@ -38,17 +36,9 @@ func (d *Decoder) Decode(ts uint32) time.Duration {
return 0 return 0
} }
diff := ts - d.prev diff := int32(ts - d.prev)
// negative difference
if diff > negativeThreshold {
diff = d.prev - ts
d.prev = ts
d.overall -= time.Duration(diff)
} else {
d.prev = ts d.prev = ts
d.overall += time.Duration(diff) d.overall += time.Duration(diff)
}
return multiplyAndDivide(d.overall, time.Second, d.clockRate) return multiplyAndDivide(d.overall, time.Second, d.clockRate)
} }