mediamtx/internal/formatprocessor/av1.go
2024-01-03 21:13:20 +01:00

117 lines
2.2 KiB
Go

package formatprocessor //nolint:dupl
import (
"errors"
"fmt"
"time"
"github.com/bluenviron/gortsplib/v4/pkg/format"
"github.com/bluenviron/gortsplib/v4/pkg/format/rtpav1"
"github.com/pion/rtp"
"github.com/bluenviron/mediamtx/internal/unit"
)
type formatProcessorAV1 struct {
udpMaxPayloadSize int
format *format.AV1
encoder *rtpav1.Encoder
decoder *rtpav1.Decoder
}
func newAV1(
udpMaxPayloadSize int,
forma *format.AV1,
generateRTPPackets bool,
) (*formatProcessorAV1, error) {
t := &formatProcessorAV1{
udpMaxPayloadSize: udpMaxPayloadSize,
format: forma,
}
if generateRTPPackets {
err := t.createEncoder()
if err != nil {
return nil, err
}
}
return t, nil
}
func (t *formatProcessorAV1) createEncoder() error {
t.encoder = &rtpav1.Encoder{
PayloadMaxSize: t.udpMaxPayloadSize - 12,
PayloadType: t.format.PayloadTyp,
}
return t.encoder.Init()
}
func (t *formatProcessorAV1) ProcessUnit(uu unit.Unit) error { //nolint:dupl
u := uu.(*unit.AV1)
pkts, err := t.encoder.Encode(u.TU)
if err != nil {
return err
}
ts := uint32(multiplyAndDivide(u.PTS, time.Duration(t.format.ClockRate()), time.Second))
for _, pkt := range pkts {
pkt.Timestamp += ts
}
u.RTPPackets = pkts
return nil
}
func (t *formatProcessorAV1) ProcessRTPPacket( //nolint:dupl
pkt *rtp.Packet,
ntp time.Time,
pts time.Duration,
hasNonRTSPReaders bool,
) (Unit, error) {
u := &unit.AV1{
Base: unit.Base{
RTPPackets: []*rtp.Packet{pkt},
NTP: ntp,
PTS: pts,
},
}
// remove padding
pkt.Header.Padding = false
pkt.PaddingSize = 0
if pkt.MarshalSize() > t.udpMaxPayloadSize {
return nil, fmt.Errorf("payload size (%d) is greater than maximum allowed (%d)",
pkt.MarshalSize(), t.udpMaxPayloadSize)
}
// decode from RTP
if hasNonRTSPReaders || t.decoder != nil {
if t.decoder == nil {
var err error
t.decoder, err = t.format.CreateDecoder()
if err != nil {
return nil, err
}
}
tu, err := t.decoder.Decode(pkt)
if err != nil {
if errors.Is(err, rtpav1.ErrNonStartingPacketAndNoPrevious) ||
errors.Is(err, rtpav1.ErrMorePacketsNeeded) {
return u, nil
}
return nil, err
}
u.TU = tu
}
// route packet as is
return u, nil
}