ghostream/stream/srt/srt.go

101 lines
2.6 KiB
Go

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