101 lines
2.6 KiB
Go
101 lines
2.6 KiB
Go
package srt
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import (
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"log"
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"net"
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"strconv"
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"github.com/haivision/srtgo"
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)
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// Options holds web package configuration
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type Options struct {
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ListenAddress string
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MaxClients int
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}
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// Packet contains the necessary data to broadcast events like stream creating, packet receiving or stream closing.
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type Packet struct {
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Data []byte
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PacketType string
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StreamName string
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}
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// Split host and port from listen address
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func splitHostPort(hostport string) (string, uint16) {
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host, portS, err := net.SplitHostPort(hostport)
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if err != nil {
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log.Fatalf("Failed to split host and port from %s", hostport)
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}
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if host == "" {
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host = "0.0.0.0"
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}
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port64, err := strconv.ParseUint(portS, 10, 16)
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if err != nil {
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log.Fatalf("Port is not a integer: %s", err)
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}
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return host, uint16(port64)
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}
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// Serve SRT server
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func Serve(cfg *Options, forwardingChannel chan Packet) {
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options := make(map[string]string)
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options["transtype"] = "live"
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// Start SRT in listen mode
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log.Printf("SRT server listening on %s", cfg.ListenAddress)
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host, port := splitHostPort(cfg.ListenAddress)
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sck := srtgo.NewSrtSocket(host, uint16(port), options)
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if err := sck.Listen(cfg.MaxClients); err != nil {
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log.Fatal("Unable to listen to SRT clients:", err)
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}
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// FIXME: See srtgo.SocketOptions and value, err := s.GetSockOptString to get parameters
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// http://ffmpeg.org/ffmpeg-protocols.html#srt
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for {
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// Wait for new connection
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s, err := sck.Accept()
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if err != nil {
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log.Println("Error occurred while accepting request:", err)
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break // FIXME: should not break here
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}
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// Create a new buffer
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buff := make([]byte, 2048)
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// Setup stream forwarding
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// FIXME: demo should be replaced by stream name
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forwardingChannel <- Packet{StreamName: "demo", PacketType: "register", Data: nil}
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// Read RTP packets forever and send them to the WebRTC Client
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for {
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n, err := s.Read(buff, 10000)
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if err != nil {
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log.Println("Error occured while reading SRT socket:", err)
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break
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}
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if n == 0 {
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// End of stream
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log.Printf("Received no bytes, stopping stream.")
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break
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}
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// log.Printf("Received %d bytes", n)
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// Send raw packet to other streams
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// Copy data in another buffer to ensure that the data would not be overwritten
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data := make([]byte, n)
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copy(data, buff[:n])
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forwardingChannel <- Packet{StreamName: "demo", PacketType: "sendData", Data: data}
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// TODO: Send to WebRTC
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// See https://github.com/ebml-go/webm/blob/master/reader.go
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//err := videoTrack.WriteSample(media.Sample{Data: data, Samples: uint32(sampleCount)})
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}
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forwardingChannel <- Packet{StreamName: "demo", PacketType: "close", Data: nil}
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}
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}
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