120 lines
2.3 KiB
Go
120 lines
2.3 KiB
Go
package formatprocessor //nolint:dupl
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/bluenviron/gortsplib/v4/pkg/format"
|
|
"github.com/bluenviron/gortsplib/v4/pkg/format/rtpmjpeg"
|
|
"github.com/pion/rtp"
|
|
|
|
"github.com/bluenviron/mediamtx/internal/unit"
|
|
)
|
|
|
|
type formatProcessorMJPEG struct {
|
|
udpMaxPayloadSize int
|
|
format *format.MJPEG
|
|
encoder *rtpmjpeg.Encoder
|
|
decoder *rtpmjpeg.Decoder
|
|
randomStart uint32
|
|
}
|
|
|
|
func newMJPEG(
|
|
udpMaxPayloadSize int,
|
|
forma *format.MJPEG,
|
|
generateRTPPackets bool,
|
|
) (*formatProcessorMJPEG, error) {
|
|
t := &formatProcessorMJPEG{
|
|
udpMaxPayloadSize: udpMaxPayloadSize,
|
|
format: forma,
|
|
}
|
|
|
|
if generateRTPPackets {
|
|
err := t.createEncoder()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
t.randomStart, err = randUint32()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return t, nil
|
|
}
|
|
|
|
func (t *formatProcessorMJPEG) createEncoder() error {
|
|
t.encoder = &rtpmjpeg.Encoder{
|
|
PayloadMaxSize: t.udpMaxPayloadSize - 12,
|
|
}
|
|
return t.encoder.Init()
|
|
}
|
|
|
|
func (t *formatProcessorMJPEG) ProcessUnit(uu unit.Unit) error { //nolint:dupl
|
|
u := uu.(*unit.MJPEG)
|
|
|
|
// encode into RTP
|
|
pkts, err := t.encoder.Encode(u.Frame)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
u.RTPPackets = pkts
|
|
|
|
for _, pkt := range u.RTPPackets {
|
|
pkt.Timestamp += t.randomStart + uint32(u.PTS)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (t *formatProcessorMJPEG) ProcessRTPPacket( //nolint:dupl
|
|
pkt *rtp.Packet,
|
|
ntp time.Time,
|
|
pts int64,
|
|
hasNonRTSPReaders bool,
|
|
) (unit.Unit, error) {
|
|
u := &unit.MJPEG{
|
|
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
|
|
}
|
|
}
|
|
|
|
frame, err := t.decoder.Decode(pkt)
|
|
if err != nil {
|
|
if errors.Is(err, rtpmjpeg.ErrNonStartingPacketAndNoPrevious) ||
|
|
errors.Is(err, rtpmjpeg.ErrMorePacketsNeeded) {
|
|
return u, nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
u.Frame = frame
|
|
}
|
|
|
|
// route packet as is
|
|
return u, nil
|
|
}
|