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ghostream/stream/srt/handler.go

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// Package srt serves a SRT server
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package srt
import (
"log"
"github.com/haivision/srtgo"
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"gitlab.crans.org/nounous/ghostream/stream"
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)
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func handleStreamer(socket *srtgo.SrtSocket, streams map[string]*stream.Stream, name string) {
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// Check stream does not exist
if _, ok := streams[name]; ok {
log.Print("Stream already exists, refusing new streamer")
socket.Close()
return
}
// Create stream
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log.Printf("New SRT streamer for stream %s", name)
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st := stream.New()
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streams[name] = st
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// Read RTP packets forever and send them to the WebRTC Client
for {
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// Create a new buffer
// UDP packet cannot be larger than MTU (1500)
buff := make([]byte, 1500)
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// 5s timeout
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n, err := socket.Read(buff, 5000)
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if err != nil {
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log.Println("Error occurred while reading SRT socket:", err)
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break
}
if n == 0 {
// End of stream
log.Printf("Received no bytes, stopping stream.")
break
}
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// Send raw data to other streams
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buff = buff[:n]
st.Broadcast <- buff
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}
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// Close stream
st.Close()
socket.Close()
delete(streams, name)
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}
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func handleViewer(s *srtgo.SrtSocket, streams map[string]*stream.Stream, name string) {
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log.Printf("New SRT viewer for stream %s", name)
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// Get requested stream
st, ok := streams[name]
if !ok {
log.Println("Stream does not exist, refusing new viewer")
return
}
// Register new output
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c := make(chan []byte, 1024)
st.Register(c)
st.IncrementClientCount()
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// Receive data and send them
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for data := range c {
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if len(data) < 1 {
log.Print("Remove SRT viewer because of end of stream")
break
}
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// Send data
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_, err := s.Write(data, 1000)
if err != nil {
log.Printf("Remove SRT viewer because of sending error, %s", err)
break
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}
}
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// Close output
st.Unregister(c)
st.DecrementClientCount()
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s.Close()
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}