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rtp_listener.go
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/
rtp_listener.go
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package rtc
import (
"fmt"
"sync"
"github.com/byyam/mediasoup-go-worker/pkg/rtpparser"
)
type RtpListener struct {
ssrcTable sync.Map
midTable sync.Map
ridTable sync.Map
}
func newRtpListener() *RtpListener {
return &RtpListener{}
}
func (r *RtpListener) AddProducer(producer *Producer) error {
// Add entries into the ssrcTable.
for _, encoding := range producer.RtpParameters.Encodings {
// Check encoding.ssrc.
if encoding.Ssrc != 0 {
if _, ok := r.ssrcTable.Load(encoding.Ssrc); ok {
return fmt.Errorf("ssrc already exists in RTP listener [ssrc:%d]", encoding.Ssrc)
}
r.ssrcTable.Store(encoding.Ssrc, producer)
}
// Check encoding.rtx.ssrc.
if encoding.Rtx != nil && encoding.Rtx.Ssrc != 0 {
if _, ok := r.ssrcTable.Load(encoding.Rtx.Ssrc); ok {
return fmt.Errorf("RTX ssrc already exists in RTP listener [ssrc:%d]", encoding.Ssrc)
}
r.ssrcTable.Store(encoding.Rtx.Ssrc, producer)
}
}
// Add entries into midTable.
if producer.RtpParameters.Mid != "" {
mid := producer.RtpParameters.Mid
if _, ok := r.midTable.Load(mid); ok {
return fmt.Errorf("MID already exists in RTP listener [mid:%s]", mid)
}
r.midTable.Store(mid, producer)
}
// Add entries into ridTable.
for _, encoding := range producer.RtpParameters.Encodings {
rid := encoding.Rid
if rid == "" {
continue
}
// Just fail if no MID is given.
if _, ok := r.ridTable.Load(rid); ok && producer.RtpParameters.Mid == "" {
return fmt.Errorf("RID already exists in RTP listener and no MID is given [rid:%s]", rid)
}
r.ridTable.Store(rid, producer)
}
return nil
}
func (r *RtpListener) GetProducer(packet *rtpparser.Packet) *Producer {
return r.GetProducerBySSRC(packet.SSRC)
}
func (r *RtpListener) GetProducerBySSRC(ssrc uint32) *Producer {
value, ok := r.ssrcTable.Load(ssrc)
if !ok {
return nil
}
return value.(*Producer)
}