96 lines
1.7 KiB
Go
96 lines
1.7 KiB
Go
package main
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import (
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"net"
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"time"
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)
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type streamerUdpListenerState int
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const (
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_UDPL_STATE_STARTING streamerUdpListenerState = iota
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_UDPL_STATE_RUNNING
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)
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type streamerUdpListener struct {
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p *program
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streamer *streamer
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trackId int
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trackFlowType trackFlowType
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publisherIp net.IP
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publisherPort int
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nconn *net.UDPConn
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running bool
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readBuf1 []byte
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readBuf2 []byte
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readCurBuf bool
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lastFrameTime time.Time
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done chan struct{}
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}
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func newStreamerUdpListener(p *program, port int, streamer *streamer,
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trackId int, trackFlowType trackFlowType, publisherIp net.IP) (*streamerUdpListener, error) {
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nconn, 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 := &streamerUdpListener{
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p: p,
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streamer: streamer,
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trackId: trackId,
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trackFlowType: trackFlowType,
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publisherIp: publisherIp,
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nconn: nconn,
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readBuf1: make([]byte, 2048),
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readBuf2: make([]byte, 2048),
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lastFrameTime: time.Now(),
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done: make(chan struct{}),
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}
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return l, nil
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}
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func (l *streamerUdpListener) close() {
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l.nconn.Close()
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if l.running {
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<-l.done
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}
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}
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func (l *streamerUdpListener) start() {
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l.running = true
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go l.run()
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}
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func (l *streamerUdpListener) run() {
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for {
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var buf []byte
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if !l.readCurBuf {
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buf = l.readBuf1
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} else {
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buf = l.readBuf2
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}
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l.readCurBuf = !l.readCurBuf
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n, addr, err := l.nconn.ReadFromUDP(buf)
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if err != nil {
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break
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}
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if !l.publisherIp.Equal(addr.IP) || addr.Port != l.publisherPort {
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continue
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}
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l.lastFrameTime = time.Now()
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l.p.events <- programEventStreamerFrame{l.streamer, l.trackId, l.trackFlowType, buf[:n]}
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}
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close(l.done)
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}
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