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server_session_format.go
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server_session_format.go
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package gortsplib
import (
"time"
"github.com/pion/rtcp"
"github.com/pion/rtp"
"github.com/bluenviron/gortsplib/v4/pkg/format"
"github.com/bluenviron/gortsplib/v4/pkg/liberrors"
"github.com/bluenviron/gortsplib/v4/pkg/rtcpreceiver"
"github.com/bluenviron/gortsplib/v4/pkg/rtplossdetector"
"github.com/bluenviron/gortsplib/v4/pkg/rtpreorderer"
)
type serverSessionFormat struct {
sm *serverSessionMedia
format format.Format
onPacketRTP OnPacketRTPFunc
udpReorderer *rtpreorderer.Reorderer
tcpLossDetector *rtplossdetector.LossDetector
rtcpReceiver *rtcpreceiver.RTCPReceiver
}
func (sf *serverSessionFormat) start() {
if sf.sm.ss.state != ServerSessionStatePlay {
if *sf.sm.ss.setuppedTransport == TransportUDP || *sf.sm.ss.setuppedTransport == TransportUDPMulticast {
sf.udpReorderer = rtpreorderer.New()
} else {
sf.tcpLossDetector = rtplossdetector.New()
}
var err error
sf.rtcpReceiver, err = rtcpreceiver.New(
sf.format.ClockRate(),
nil,
sf.sm.ss.s.receiverReportPeriod,
sf.sm.ss.s.timeNow,
func(pkt rtcp.Packet) {
if *sf.sm.ss.setuppedTransport == TransportUDP || *sf.sm.ss.setuppedTransport == TransportUDPMulticast {
sf.sm.ss.WritePacketRTCP(sf.sm.media, pkt) //nolint:errcheck
}
})
if err != nil {
panic(err)
}
}
}
func (sf *serverSessionFormat) stop() {
if sf.rtcpReceiver != nil {
sf.rtcpReceiver.Close()
sf.rtcpReceiver = nil
}
}
func (sf *serverSessionFormat) readRTPUDP(pkt *rtp.Packet, now time.Time) {
packets, lost := sf.udpReorderer.Process(pkt)
if lost != 0 {
sf.sm.ss.onPacketLost(liberrors.ErrServerRTPPacketsLost{Lost: lost})
// do not return
}
for _, pkt := range packets {
err := sf.rtcpReceiver.ProcessPacket(pkt, now, sf.format.PTSEqualsDTS(pkt))
if err != nil {
sf.sm.ss.onDecodeError(err)
continue
}
sf.onPacketRTP(pkt)
}
}
func (sf *serverSessionFormat) readRTPTCP(pkt *rtp.Packet) {
lost := sf.tcpLossDetector.Process(pkt)
if lost != 0 {
sf.sm.ss.onPacketLost(liberrors.ErrServerRTPPacketsLost{Lost: lost})
// do not return
}
now := sf.sm.ss.s.timeNow()
err := sf.rtcpReceiver.ProcessPacket(pkt, now, sf.format.PTSEqualsDTS(pkt))
if err != nil {
sf.sm.ss.onDecodeError(err)
return
}
sf.onPacketRTP(pkt)
}