114 lines
2.1 KiB
Go
114 lines
2.1 KiB
Go
package main
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import (
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"net"
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"sync/atomic"
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"time"
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"github.com/aler9/gortsplib"
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"github.com/aler9/gortsplib/multibuffer"
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)
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const (
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udpReadBufferSize = 2048
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)
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type udpBufAddrPair struct {
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buf []byte
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addr *net.UDPAddr
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}
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type serverUDP struct {
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p *program
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pc *net.UDPConn
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streamType gortsplib.StreamType
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readBuf *multibuffer.MultiBuffer
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writec chan udpBufAddrPair
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done chan struct{}
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}
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func newServerUDP(p *program, port int, streamType gortsplib.StreamType) (*serverUDP, error) {
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pc, err := net.ListenUDP("udp", &net.UDPAddr{
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Port: port,
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})
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if err != nil {
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return nil, err
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}
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l := &serverUDP{
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p: p,
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pc: pc,
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streamType: streamType,
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readBuf: multibuffer.New(2, udpReadBufferSize),
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writec: make(chan udpBufAddrPair),
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done: make(chan struct{}),
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}
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l.log("opened on :%d", port)
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return l, nil
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}
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func (l *serverUDP) log(format string, args ...interface{}) {
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var label string
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if l.streamType == gortsplib.StreamTypeRtp {
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label = "RTP"
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} else {
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label = "RTCP"
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}
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l.p.log("[UDP/"+label+" server] "+format, args...)
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}
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func (l *serverUDP) run() {
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writeDone := make(chan struct{})
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go func() {
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defer close(writeDone)
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for w := range l.writec {
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l.pc.SetWriteDeadline(time.Now().Add(l.p.conf.WriteTimeout))
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l.pc.WriteTo(w.buf, w.addr)
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}
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}()
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for {
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buf := l.readBuf.Next()
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n, addr, err := l.pc.ReadFromUDP(buf)
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if err != nil {
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break
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}
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pub := l.p.udpPublishersMap.get(makeUDPPublisherAddr(addr.IP, addr.Port))
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if pub == nil {
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continue
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}
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// client sent RTP on RTCP port or vice-versa
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if pub.streamType != l.streamType {
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continue
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}
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atomic.StoreInt64(pub.client.udpLastFrameTimes[pub.trackId], time.Now().Unix())
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pub.client.rtcpReceivers[pub.trackId].OnFrame(l.streamType, buf[:n])
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l.p.readersMap.forwardFrame(pub.client.path,
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pub.trackId,
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l.streamType,
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buf[:n])
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}
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close(l.writec)
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<-writeDone
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close(l.done)
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}
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func (l *serverUDP) close() {
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l.pc.Close()
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<-l.done
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}
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func (l *serverUDP) write(data []byte, addr *net.UDPAddr) {
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l.writec <- udpBufAddrPair{data, addr}
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}
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