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rtp*: support decoding negative timestamps

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aler9
2021-03-09 08:36:39 +01:00
parent a66c1a8bdf
commit 7be302bd03
3 changed files with 31 additions and 4 deletions
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10
pkg/rtph264/decoder.go
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@@ -50,6 +50,10 @@ func NewDecoder() *Decoder {
return &Decoder{}
}
func (d *Decoder) decodeTimestamp(ts uint32) time.Duration {
return (time.Duration(ts) - time.Duration(d.initialTs)) * time.Second / rtpClockRate
}
// Decode decodes NALUs from RTP/H264 packets.
// It can return:
// * no NALUs and ErrMorePacketsNeeded
@@ -82,7 +86,7 @@ func (d *Decoder) Decode(byts []byte) ([]*NALUAndTimestamp, error) {
NALUTypeReserved23:
return []*NALUAndTimestamp{{
NALU: pkt.Payload,
Timestamp: time.Duration(pkt.Timestamp-d.initialTs) * time.Second / rtpClockRate,
Timestamp: d.decodeTimestamp(pkt.Timestamp),
}}, nil
case NALUTypeStapA:
@@ -108,7 +112,7 @@ func (d *Decoder) Decode(byts []byte) ([]*NALUAndTimestamp, error) {
ret = append(ret, &NALUAndTimestamp{
NALU: pkt.Payload[:size],
Timestamp: time.Duration(pkt.Timestamp-d.initialTs) * time.Second / rtpClockRate,
Timestamp: d.decodeTimestamp(pkt.Timestamp),
})
pkt.Payload = pkt.Payload[size:]
}
@@ -166,7 +170,7 @@ func (d *Decoder) Decode(byts []byte) ([]*NALUAndTimestamp, error) {
d.state = decoderStateInitial
return []*NALUAndTimestamp{{
NALU: d.fragmentedBuf,
Timestamp: time.Duration(pkt.Timestamp-d.initialTs) * time.Second / rtpClockRate,
Timestamp: d.decodeTimestamp(pkt.Timestamp),
}}, nil
}
}