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Code Issues Releases Wiki Activity

Make webrtc and forwarding work with new messaging

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This commit is contained in:
Alexandre Iooss
2020-10-18 16:05:28 +02:00
parent 37d944621b
commit b9da2ab3a7
6 changed files with 144 additions and 120 deletions
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47
stream/forwarding/forwarding.go
View File

@@ -2,12 +2,10 @@
package forwarding
import (
"bufio"
"io"
"log"
"os/exec"
"time"
"gitlab.crans.org/nounous/ghostream/stream/srt"
"gitlab.crans.org/nounous/ghostream/stream"
)
// Options to configure the stream forwarding.
@@ -15,21 +13,46 @@ import (
type Options map[string][]string
// Serve handles incoming packets from SRT and forward them to other external services
func Serve(inputChannel chan srt.Packet, cfg Options) {
func Serve(streams map[string]*stream.Stream, cfg Options) {
if len(cfg) < 1 {
// No forwarding, ignore
for {
<-inputChannel // Clear input channel
}
return
}
log.Printf("Stream forwarding initialized")
ffmpegInstances := make(map[string]*exec.Cmd)
for {
for name, st := range streams {
fwdCfg, ok := cfg[name]
if !ok {
// Not configured
continue
}
// Start forwarding
log.Printf("Starting forwarding for '%s'", name)
go forward(st, fwdCfg)
}
// Regulary pull stream list,
// it may be better to tweak the messaging system
// to get an event on a new stream.
time.Sleep(time.Second)
}
}
func forward(st *stream.Stream, fwdCfg []string) {
// FIXME
/*ffmpegInstances := make(map[string]*exec.Cmd)
ffmpegInputStreams := make(map[string]*io.WriteCloser)
for {
var err error = nil
// Wait for packets
packet := <-inputChannel
// FIXME packet := <-inputChannel
packet := srt.Packet{
Data: []byte{},
PacketType: "nothing",
StreamName: "demo",
}
switch packet.PacketType {
case "register":
err = registerStream(packet.StreamName, ffmpegInstances, ffmpegInputStreams, cfg)
@@ -47,9 +70,10 @@ func Serve(inputChannel chan srt.Packet, cfg Options) {
if err != nil {
log.Printf("Error occurred while receiving SRT packet of type %s: %s", packet.PacketType, err)
}
}
}*/
}
/*
// registerStream creates ffmpeg instance associated with newly created stream
func registerStream(name string, ffmpegInstances map[string]*exec.Cmd, ffmpegInputStreams map[string]*io.WriteCloser, cfg Options) error {
streams, exist := cfg[name]
@@ -119,3 +143,4 @@ func close(name string, ffmpegInstances map[string]*exec.Cmd, ffmpegInputStreams
delete(ffmpegInputStreams, name)
return nil
}
*/

12
stream/forwarding/forwarding_test.go
View File

@@ -6,6 +6,7 @@ import (
"testing"
"time"
"gitlab.crans.org/nounous/ghostream/stream"
"gitlab.crans.org/nounous/ghostream/stream/srt"
)
@@ -30,16 +31,15 @@ func TestForwardStream(t *testing.T) {
}
}()
forwardingList := make(map[string][]string)
forwardingList["demo"] = []string{"rtmp://127.0.0.1:1936/live/app"}
forwardingChannel := make(chan srt.Packet)
cfg := make(map[string][]string)
cfg["demo"] = []string{"rtmp://127.0.0.1:1936/live/app"}
// Register forwarding stream list
go Serve(forwardingChannel, forwardingList)
streams := make(map[string]*stream.Stream)
go Serve(streams, cfg)
// Serve SRT Server without authentification backend
go srt.Serve(&srt.Options{Enabled: true, ListenAddress: ":9712", MaxClients: 2}, nil, forwardingChannel, nil)
go srt.Serve(streams, nil, &srt.Options{Enabled: true, ListenAddress: ":9712", MaxClients: 2})
ffmpeg := exec.Command("ffmpeg", "-hide_banner", "-loglevel", "error",
"-re", "-f", "lavfi", "-i", "testsrc=size=640x480:rate=10",

183
stream/webrtc/ingest.go
View File

@@ -3,61 +3,53 @@ package webrtc
import (
"bufio"
"fmt"
"io"
"log"
"net"
"os/exec"
"strings"
"time"
"github.com/pion/rtp"
"github.com/pion/webrtc/v3"
"gitlab.crans.org/nounous/ghostream/stream/srt"
"gitlab.crans.org/nounous/ghostream/stream/telnet"
"gitlab.crans.org/nounous/ghostream/stream"
)
var (
ffmpeg = make(map[string]*exec.Cmd)
ffmpegInput = make(map[string]io.WriteCloser)
activeStream map[string]struct{}
)
func ingestFrom(inputChannel chan srt.Packet) {
// FIXME Clean code
func autoIngest(streams map[string]*stream.Stream) {
// Regulary check existing streams
activeStream = make(map[string]struct{})
for {
var err error = nil
srtPacket := <-inputChannel
switch srtPacket.PacketType {
case "register":
go registerStream(&srtPacket)
break
case "sendData":
if _, ok := ffmpegInput[srtPacket.StreamName]; !ok {
break
for name, st := range streams {
if strings.Contains(name, "@") {
// Not a source stream, pass
continue
}
// FIXME send to stream srtPacket.StreamName
if _, err := ffmpegInput[srtPacket.StreamName].Write(srtPacket.Data); err != nil {
log.Printf("Failed to write data to ffmpeg input: %s", err)
if _, ok := activeStream[name]; ok {
// Stream is already ingested
continue
}
break
case "close":
log.Printf("WebRTC CloseConnection %s", srtPacket.StreamName)
_ = ffmpeg[srtPacket.StreamName].Process.Kill()
_ = ffmpegInput[srtPacket.StreamName].Close()
delete(ffmpeg, srtPacket.StreamName)
delete(ffmpegInput, srtPacket.StreamName)
break
default:
log.Println("Unknown SRT srtPacket type:", srtPacket.PacketType)
break
}
if err != nil {
log.Printf("Error occurred while receiving SRT srtPacket of type %s: %s", srtPacket.PacketType, err)
// Start ingestion
log.Printf("Starting webrtc for '%s'", name)
go ingest(name, st)
}
// Regulary pull stream list,
// it may be better to tweak the messaging system
// to get an event on a new stream.
time.Sleep(time.Second)
}
}
func registerStream(srtPacket *srt.Packet) {
log.Printf("WebRTC RegisterStream %s", srtPacket.StreamName)
func ingest(name string, input *stream.Stream) {
// Register to get stream
videoInput := make(chan []byte, 1024)
input.Register(videoInput)
activeStream[name] = struct{}{}
// Open a UDP Listener for RTP Packets on port 5004
videoListener, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: 5004})
@@ -70,55 +62,12 @@ func registerStream(srtPacket *srt.Packet) {
log.Printf("Faited to open UDP listener %s", err)
return
}
// FIXME Close UDP listeners at the end of the stream, not the end of the routine
/* defer func() {
if err = videoListener.Close(); err != nil {
log.Printf("Faited to close UDP listener %s", err)
}
if err = audioListener.Close(); err != nil {
log.Printf("Faited to close UDP listener %s", err)
}
}() */
ffmpegArgs := []string{"-hide_banner", "-loglevel", "error", "-i", "pipe:0",
"-an", "-vcodec", "libvpx", "-crf", "10", "-cpu-used", "5", "-b:v", "6000k", "-maxrate", "8000k", "-bufsize", "12000k", // TODO Change bitrate when changing quality
"-qmin", "10", "-qmax", "42", "-threads", "4", "-deadline", "1", "-error-resilient", "1",
"-auto-alt-ref", "1",
"-f", "rtp", "rtp://127.0.0.1:5004",
"-vn", "-acodec", "libopus", "-cpu-used", "5", "-deadline", "1", "-qmin", "10", "-qmax", "42", "-error-resilient", "1", "-auto-alt-ref", "1",
"-f", "rtp", "rtp://127.0.0.1:5005"}
// Export stream to ascii art
if telnet.Cfg.Enabled {
bitrate := fmt.Sprintf("%dk", telnet.Cfg.Width*telnet.Cfg.Height/telnet.Cfg.Delay)
ffmpegArgs = append(ffmpegArgs,
"-an", "-vf", fmt.Sprintf("scale=%dx%d", telnet.Cfg.Width, telnet.Cfg.Height),
"-b:v", bitrate, "-minrate", bitrate, "-maxrate", bitrate, "-bufsize", bitrate, "-q", "42", "-pix_fmt", "gray", "-f", "rawvideo", "pipe:1")
}
ffmpeg[srtPacket.StreamName] = exec.Command("ffmpeg", ffmpegArgs...)
input, err := ffmpeg[srtPacket.StreamName].StdinPipe()
// Start ffmpag to convert videoInput to video and audio UDP
ffmpeg, err := startFFmpeg(videoInput)
if err != nil {
panic(err)
}
ffmpegInput[srtPacket.StreamName] = input
errOutput, err := ffmpeg[srtPacket.StreamName].StderrPipe()
if err != nil {
panic(err)
}
// Receive raw video output and convert it to ASCII art, then forward it TCP
if telnet.Cfg.Enabled {
output, err := ffmpeg[srtPacket.StreamName].StdoutPipe()
if err != nil {
panic(err)
}
go telnet.StartASCIIArtStream(srtPacket.StreamName, output)
}
if err := ffmpeg[srtPacket.StreamName].Start(); err != nil {
panic(err)
log.Printf("Error while starting ffmpeg: %s", err)
return
}
// Receive video
@@ -128,7 +77,7 @@ func registerStream(srtPacket *srt.Packet) {
n, _, err := videoListener.ReadFromUDP(inboundRTPPacket)
if err != nil {
log.Printf("Failed to read from UDP: %s", err)
continue
break
}
packet := &rtp.Packet{}
if err := packet.Unmarshal(inboundRTPPacket[:n]); err != nil {
@@ -136,13 +85,13 @@ func registerStream(srtPacket *srt.Packet) {
continue
}
if videoTracks[srtPacket.StreamName] == nil {
videoTracks[srtPacket.StreamName] = make([]*webrtc.Track, 0)
if videoTracks[name] == nil {
videoTracks[name] = make([]*webrtc.Track, 0)
}
// Write RTP srtPacket to all video tracks
// Adapt payload and SSRC to match destination
for _, videoTrack := range videoTracks[srtPacket.StreamName] {
for _, videoTrack := range videoTracks[name] {
packet.Header.PayloadType = videoTrack.PayloadType()
packet.Header.SSRC = videoTrack.SSRC()
if writeErr := videoTrack.WriteRTP(packet); writeErr != nil {
@@ -160,7 +109,7 @@ func registerStream(srtPacket *srt.Packet) {
n, _, err := audioListener.ReadFromUDP(inboundRTPPacket)
if err != nil {
log.Printf("Failed to read from UDP: %s", err)
continue
break
}
packet := &rtp.Packet{}
if err := packet.Unmarshal(inboundRTPPacket[:n]); err != nil {
@@ -168,13 +117,13 @@ func registerStream(srtPacket *srt.Packet) {
continue
}
if audioTracks[srtPacket.StreamName] == nil {
audioTracks[srtPacket.StreamName] = make([]*webrtc.Track, 0)
if audioTracks[name] == nil {
audioTracks[name] = make([]*webrtc.Track, 0)
}
// Write RTP srtPacket to all audio tracks
// Adapt payload and SSRC to match destination
for _, audioTrack := range audioTracks[srtPacket.StreamName] {
for _, audioTrack := range audioTracks[name] {
packet.Header.PayloadType = audioTrack.PayloadType()
packet.Header.SSRC = audioTrack.SSRC()
if writeErr := audioTrack.WriteRTP(packet); writeErr != nil {
@@ -185,10 +134,60 @@ func registerStream(srtPacket *srt.Packet) {
}
}()
// Wait for stopped ffmpeg
if err = ffmpeg.Wait(); err != nil {
log.Printf("Faited to wait for ffmpeg: %s", err)
}
// Close UDP listeners
if err = videoListener.Close(); err != nil {
log.Printf("Faited to close UDP listener: %s", err)
}
if err = audioListener.Close(); err != nil {
log.Printf("Faited to close UDP listener: %s", err)
}
delete(activeStream, name)
}
func startFFmpeg(in <-chan []byte) (ffmpeg *exec.Cmd, err error) {
ffmpegArgs := []string{"-hide_banner", "-loglevel", "error", "-i", "pipe:0",
"-an", "-vcodec", "libvpx", "-crf", "10", "-cpu-used", "5", "-b:v", "6000k", "-maxrate", "8000k", "-bufsize", "12000k", // TODO Change bitrate when changing quality
"-qmin", "10", "-qmax", "42", "-threads", "4", "-deadline", "1", "-error-resilient", "1",
"-auto-alt-ref", "1",
"-f", "rtp", "rtp://127.0.0.1:5004",
"-vn", "-acodec", "libopus", "-cpu-used", "5", "-deadline", "1", "-qmin", "10", "-qmax", "42", "-error-resilient", "1", "-auto-alt-ref", "1",
"-f", "rtp", "rtp://127.0.0.1:5005"}
ffmpeg = exec.Command("ffmpeg", ffmpegArgs...)
// Handle errors output
errOutput, err := ffmpeg.StderrPipe()
if err != nil {
return nil, err
}
go func() {
scanner := bufio.NewScanner(errOutput)
for scanner.Scan() {
log.Printf("[WEBRTC FFMPEG %s] %s", "demo", scanner.Text())
}
}()
// Handle stream input
input, err := ffmpeg.StdinPipe()
if err != nil {
return nil, err
}
go func() {
for data := range in {
if _, err := input.Write(data); err != nil {
log.Printf("Failed to write data to ffmpeg input: %s", err)
}
}
// End of stream
ffmpeg.Process.Kill()
}()
// Start process
err = ffmpeg.Start()
return ffmpeg, err
}

12
stream/webrtc/webrtc.go
View File

@@ -8,7 +8,7 @@ import (
"github.com/pion/webrtc/v3"
"gitlab.crans.org/nounous/ghostream/internal/monitoring"
"gitlab.crans.org/nounous/ghostream/stream/srt"
"gitlab.crans.org/nounous/ghostream/stream"
)
// Options holds web package configuration
@@ -182,12 +182,12 @@ func getPayloadType(m webrtc.MediaEngine, codecType webrtc.RTPCodecType, codecNa
}
// Serve WebRTC media streaming server
func Serve(remoteSdpChan chan struct {
func Serve(streams map[string]*stream.Stream, remoteSdpChan chan struct {
StreamID string
RemoteDescription webrtc.SessionDescription
}, localSdpChan chan webrtc.SessionDescription, inputChannel chan srt.Packet, cfg *Options) {
}, localSdpChan chan webrtc.SessionDescription, cfg *Options) {
if !cfg.Enabled {
// SRT is not enabled, ignore
// WebRTC is not enabled, ignore
return
}
@@ -197,8 +197,8 @@ func Serve(remoteSdpChan chan struct {
videoTracks = make(map[string][]*webrtc.Track)
audioTracks = make(map[string][]*webrtc.Track)
// Ingest data from SRT
go ingestFrom(inputChannel)
// Ingest data
go autoIngest(streams)
// Handle new connections
for {

8
stream/webrtc/webrtc_test.go
View File

@@ -5,24 +5,24 @@ import (
"testing"
"github.com/pion/webrtc/v3"
"gitlab.crans.org/nounous/ghostream/stream/srt"
"gitlab.crans.org/nounous/ghostream/stream"
)
func TestServe(t *testing.T) {
// Serve WebRTC server
// Init streams messaging and WebRTC server
streams := make(map[string]*stream.Stream)
remoteSdpChan := make(chan struct {
StreamID string
RemoteDescription webrtc.SessionDescription
})
localSdpChan := make(chan webrtc.SessionDescription)
webrtcChannel := make(chan srt.Packet, 64)
cfg := Options{
Enabled: true,
MinPortUDP: 10000,
MaxPortUDP: 10005,
STUNServers: []string{"stun:stun.l.google.com:19302"},
}
go Serve(remoteSdpChan, localSdpChan, webrtcChannel, &cfg)
go Serve(streams, remoteSdpChan, localSdpChan, &cfg)
// New client connection
mediaEngine := webrtc.MediaEngine{}

2
transcoder/text/text.go
View File

@@ -153,5 +153,5 @@ func startFFmpeg(in <-chan []byte, cfg *Options) (*exec.Cmd, *io.ReadCloser, err
// Start process
err = ffmpeg.Start()
return ffmpeg, &output, nil
return ffmpeg, &output, err
}