1
Fork 0
mirror of https://github.com/jech/galene.git synced 2024-11-10 02:35:58 +01:00

Label tracks explicitly.

For now, this is only used to request screen sharing as opposed to normal
videos.  In the future, it will be used for simulcasting.
This commit is contained in:
Juliusz Chroboczek 2020-05-17 22:31:29 +02:00
parent 7281a09f6e
commit b26a8cad78
5 changed files with 106 additions and 78 deletions

View file

@ -26,7 +26,6 @@ import (
"github.com/gorilla/websocket"
"github.com/pion/rtcp"
"github.com/pion/rtp"
"github.com/pion/sdp"
"github.com/pion/webrtc/v2"
)
@ -104,6 +103,7 @@ type clientMessage struct {
Offer *webrtc.SessionDescription `json:"offer,omitempty"`
Answer *webrtc.SessionDescription `json:"answer,omitempty"`
Candidate *webrtc.ICECandidateInit `json:"candidate,omitempty"`
Labels map[string]string `json:"labels,omitempty"`
Del bool `json:"del,omitempty"`
Request []string `json:"request,omitempty"`
}
@ -301,13 +301,14 @@ func addUpConn(c *client, id string) (*upConnection, error) {
}
track := &upTrack{
track: remote,
label: u.labels[remote.ID()],
cache: packetcache.New(96),
rate: estimator.New(time.Second),
jitter: jitter.New(remote.Codec().ClockRate),
maxBitrate: ^uint64(0),
}
u.tracks = append(u.tracks, track)
done := len(u.tracks) >= u.trackCount
done := u.complete()
if remote.Kind() == webrtc.RTPCodecTypeVideo {
atomic.AddUint32(&c.group.videoCount, 1)
}
@ -830,28 +831,27 @@ func sendRecovery(p *rtcp.TransportLayerNack, track *downTrack) {
}
}
func countMediaStreams(data string) (int, error) {
desc := sdp.NewJSEPSessionDescription(false)
err := desc.Unmarshal(data)
func negotiate(c *client, id string, down *downConnection) error {
offer, err := down.pc.CreateOffer(nil)
if err != nil {
return 0, err
return err
}
return len(desc.MediaDescriptions), nil
}
func negotiate(c *client, id string, pc *webrtc.PeerConnection) error {
offer, err := pc.CreateOffer(nil)
err = down.pc.SetLocalDescription(offer)
if err != nil {
return err
}
err = pc.SetLocalDescription(offer)
if err != nil {
return err
labels := make(map[string]string)
for _, t := range down.tracks {
labels[t.track.ID()] = t.remote.label
}
return c.write(clientMessage{
Type: "offer",
Id: id,
Offer: &offer,
Type: "offer",
Id: id,
Offer: &offer,
Labels: labels,
})
}
@ -867,7 +867,7 @@ func sendICE(c *client, id string, candidate *webrtc.ICECandidate) error {
})
}
func gotOffer(c *client, offer webrtc.SessionDescription, id string) error {
func gotOffer(c *client, id string, offer webrtc.SessionDescription, labels map[string]string) error {
var err error
up, ok := c.up[id]
if !ok {
@ -879,12 +879,6 @@ func gotOffer(c *client, offer webrtc.SessionDescription, id string) error {
if c.username != "" {
up.label = c.username
}
n, err := countMediaStreams(offer.SDP)
if err != nil {
log.Printf("Couldn't parse SDP: %v", err)
n = 2
}
up.trackCount = n
err = up.pc.SetRemoteDescription(offer)
if err != nil {
return err
@ -900,6 +894,8 @@ func gotOffer(c *client, offer webrtc.SessionDescription, id string) error {
return err
}
up.labels = labels
return c.write(clientMessage{
Type: "answer",
Id: id,
@ -907,7 +903,7 @@ func gotOffer(c *client, offer webrtc.SessionDescription, id string) error {
})
}
func gotAnswer(c *client, answer webrtc.SessionDescription, id string) error {
func gotAnswer(c *client, id string, answer webrtc.SessionDescription) error {
conn := getDownConn(c, id)
if conn == nil {
return protocolError("unknown id in answer")
@ -934,11 +930,7 @@ func gotICE(c *client, candidate *webrtc.ICECandidateInit, id string) error {
return pc.AddICECandidate(*candidate)
}
func (c *client) setRequested(audio, video bool) error {
if audio == c.requestedAudio && video == c.requestedVideo {
return nil
}
func (c *client) setRequested(requested []string) error {
if c.down != nil {
for id := range c.down {
c.write(clientMessage{
@ -949,8 +941,7 @@ func (c *client) setRequested(audio, video bool) error {
}
}
c.requestedAudio = audio
c.requestedVideo = video
c.requested = requested
go func() {
clients := c.group.getClients(c)
@ -962,15 +953,13 @@ func (c *client) setRequested(audio, video bool) error {
return nil
}
func (c *client) requested(kind webrtc.RTPCodecType) bool {
switch kind {
case webrtc.RTPCodecTypeAudio:
return c.requestedAudio
case webrtc.RTPCodecTypeVideo:
return c.requestedVideo
default:
return false
func (c *client) isRequested(label string) bool {
for _, r := range c.requested {
if label == r {
return true
}
}
return false
}
func pushTracks(c *client, conn *upConnection, tracks []*upTrack, done bool, label string) {
@ -989,7 +978,7 @@ func clientLoop(c *client, conn *websocket.Conn) error {
go clientReader(conn, read, c.done)
defer func() {
c.setRequested(false, false)
c.setRequested([]string{})
if c.up != nil {
for id := range c.up {
delUpConn(c, id)
@ -1044,7 +1033,7 @@ func clientLoop(c *client, conn *websocket.Conn) error {
case addTrackAction:
var down *downConnection
var err error
if c.requested(a.track.track.Kind()) {
if c.isRequested(a.track.label) {
down, _, err = addDownTrack(
c, a.remote.id, a.track,
a.remote)
@ -1055,7 +1044,7 @@ func clientLoop(c *client, conn *websocket.Conn) error {
down = getDownConn(c, a.remote.id)
}
if a.done && down != nil {
err = negotiate(c, a.remote.id, down.pc)
err = negotiate(c, a.remote.id, down)
if err != nil {
return err
}
@ -1080,7 +1069,7 @@ func clientLoop(c *client, conn *websocket.Conn) error {
copy(tracks, u.tracks)
go pushTracks(
a.c, u, tracks,
len(tracks) >= u.trackCount-1,
u.complete(),
u.label,
)
}
@ -1141,15 +1130,7 @@ func clientLoop(c *client, conn *websocket.Conn) error {
func handleClientMessage(c *client, m clientMessage) error {
switch m.Type {
case "request":
var audio, video bool
for _, s := range m.Request {
switch(s) {
case "audio": audio = true
case "video": video = true
default: log.Printf("Unknown request %v", s)
}
}
err := c.setRequested(audio, video)
err := c.setRequested(m.Request)
if err != nil {
return err
}
@ -1164,7 +1145,7 @@ func handleClientMessage(c *client, m clientMessage) error {
if m.Offer == nil {
return protocolError("null offer")
}
err := gotOffer(c, *m.Offer, m.Id)
err := gotOffer(c, m.Id, *m.Offer, m.Labels)
if err != nil {
return err
}
@ -1172,7 +1153,7 @@ func handleClientMessage(c *client, m clientMessage) error {
if m.Answer == nil {
return protocolError("null answer")
}
err := gotAnswer(c, *m.Answer, m.Id)
err := gotAnswer(c, m.Id, *m.Answer)
if err != nil {
return err
}

View file

@ -26,6 +26,7 @@ import (
type upTrack struct {
track *webrtc.Track
label string
rate *estimator.Estimator
cache *packetcache.Cache
jitter *jitter.Estimator
@ -74,11 +75,27 @@ func (up *upTrack) hasRtcpFb(tpe, parameter string) bool {
}
type upConnection struct {
id string
label string
pc *webrtc.PeerConnection
trackCount int
tracks []*upTrack
id string
label string
pc *webrtc.PeerConnection
tracks []*upTrack
labels map[string]string
}
func (up *upConnection) complete() bool {
for id, _ := range up.labels {
found := false
for _, t := range up.tracks {
if t.track.ID() == id {
found = true
break
}
}
if !found {
return false
}
}
return true
}
type bitrate struct {
@ -150,16 +167,15 @@ type downConnection struct {
}
type client struct {
group *group
id string
username string
permissions userPermission
requestedAudio bool
requestedVideo bool
done chan struct{}
writeCh chan interface{}
writerDone chan struct{}
actionCh chan interface{}
group *group
id string
username string
permissions userPermission
requested []string
done chan struct{}
writeCh chan interface{}
writerDone chan struct{}
actionCh chan interface{}
mu sync.Mutex
down map[string]*downConnection

View file

@ -65,6 +65,11 @@ h1 {
margin-right: 0.4em;
}
#requestselect {
width: 8em;
text-align-last: center;
}
#main {
display: flex;
}

View file

@ -47,8 +47,12 @@
<label for="sharebox">Share screen:</label>
<input id="sharebox" type="checkbox" disabled/>
<label for="requestbox">Receive video:</label>
<input id="requestbox" type="checkbox" checked>
<label for="requestselect">Receive:</label>
<select id="requestselect">
<option value="audio">audio only</option>
<option value="screenshare">screen share</option>
<option value="everything" selected>everything</option>
</select>
</div>
</div>

View file

@ -39,6 +39,7 @@ function Connection(id, pc) {
this.label = null;
this.pc = pc;
this.stream = null;
this.labels = {};
this.iceCandidates = [];
this.timers = [];
this.audioStats = {};
@ -140,9 +141,9 @@ document.getElementById('sharebox').onchange = function(e) {
setShareMedia(this.checked);
};
document.getElementById('requestbox').onchange = function(e) {
document.getElementById('requestselect').onchange = function(e) {
e.preventDefault();
sendRequest(this.checked);
sendRequest(this.value);
};
async function updateStats(conn, sender) {
@ -312,6 +313,7 @@ async function setLocalMedia(setup) {
let c = up[localMediaId];
c.stream = stream;
stream.getTracks().forEach(t => {
c.labels[t.id] = t.kind
let sender = c.pc.addTrack(t, stream);
c.setInterval(() => {
updateStats(c, sender);
@ -358,6 +360,7 @@ async function setShareMedia(setup) {
document.getElementById('sharebox').checked = false;
setShareMedia(false);
};
c.labels[t.id] = 'screenshare';
c.setInterval(() => {
updateStats(c, sender);
}, 2000);
@ -485,7 +488,7 @@ function serverConnect() {
username: up.username,
password: up.password,
});
sendRequest(document.getElementById('requestbox').checked);
sendRequest(document.getElementById('requestselect').value);
resolve();
};
socket.onclose = function(e) {
@ -508,7 +511,7 @@ function serverConnect() {
let m = JSON.parse(e.data);
switch(m.type) {
case 'offer':
gotOffer(m.id, m.offer);
gotOffer(m.id, m.labels, m.offer);
break;
case 'answer':
gotAnswer(m.id, m.answer);
@ -556,14 +559,30 @@ function serverConnect() {
});
}
function sendRequest(video) {
function sendRequest(value) {
let request = [];
switch(value) {
case 'audio':
request = ['audio'];
break;
case 'screenshare':
request = ['audio', 'screenshare'];
break;
case 'everything':
request = ['audio', 'screenshare', 'video'];
break;
default:
console.error(`Uknown value ${value} in sendRequest`);
break;
}
send({
type: 'request',
request: video ? ['audio', 'video'] : ['audio'],
request: request,
});
}
async function gotOffer(id, offer) {
async function gotOffer(id, labels, offer) {
let c = down[id];
if(!c) {
let pc = new RTCPeerConnection({
@ -587,6 +606,8 @@ async function gotOffer(id, offer) {
};
}
c.labels = labels;
await c.pc.setRemoteDescription(offer);
await addIceCandidates(c);
let answer = await c.pc.createAnswer();
@ -1007,6 +1028,7 @@ async function negotiate(id) {
send({
type: 'offer',
id: id,
labels: c.labels,
offer: offer,
});
}