ghostream/stream/srt/srt.go

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package srt
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// #include <srt/srt.h>
import "C"
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import (
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"gitlab.crans.org/nounous/ghostream/auth"
"gitlab.crans.org/nounous/ghostream/auth/bypass"
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"log"
"net"
"strconv"
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"strings"
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"github.com/haivision/srtgo"
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)
// Options holds web package configuration
type Options struct {
ListenAddress string
MaxClients int
}
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// 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)
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}
// Serve SRT server
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func Serve(cfg *Options, authBackend auth.Backend, forwardingChannel chan Packet) {
if authBackend == nil {
authBackend, _ = bypass.New()
}
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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
log.Printf("SRT server listening on %s", cfg.ListenAddress)
host, port := splitHostPort(cfg.ListenAddress)
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sck := srtgo.NewSrtSocket(host, port, options)
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if err := sck.Listen(cfg.MaxClients); err != nil {
log.Fatal("Unable to listen to SRT clients:", err)
}
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// FIXME: See srtgo.SocketOptions and value, err := s.GetSockOptString to get parameters
// 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()
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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streamID, err := s.GetSockOptString(C.SRTO_STREAMID)
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if err != nil {
log.Println("Error while fetching stream key:", err)
s.Close()
continue
}
if !strings.Contains(streamID, "|") {
log.Printf("Warning: stream id must be at the format streamID|password. Input: %s", streamID)
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s.Close()
continue
}
splittedStreamID := strings.SplitN(streamID, "|", 2)
streamName, password := splittedStreamID[0], splittedStreamID[1]
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loggedIn, err := authBackend.Login(streamName, password)
if !loggedIn {
log.Printf("Invalid credentials for stream %s.", streamName)
s.Close()
continue
}
log.Printf("Starting stream %s...", streamName)
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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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forwardingChannel <- Packet{StreamName: streamName, PacketType: "register", Data: nil}
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// 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
}
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if n == 0 {
// End of stream
log.Printf("Received no bytes, stopping stream.")
break
}
// log.Printf("Received %d bytes", n)
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// 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])
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forwardingChannel <- Packet{StreamName: streamName, 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
//err := videoTrack.WriteSample(media.Sample{Data: data, Samples: uint32(sampleCount)})
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}
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forwardingChannel <- Packet{StreamName: streamName, PacketType: "close", Data: nil}
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}
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sck.Close()
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}