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Rework locking of tracks.

We now add tracks after the stream has been pushed, so we need a lock
on down streams.  Also rework sendUpRTCP to reduce locking.
This commit is contained in:
Juliusz Chroboczek 2021-01-19 23:55:33 +01:00
parent 9a5c8b6b43
commit f0dcd0b1d9
2 changed files with 28 additions and 12 deletions

View file

@ -139,10 +139,20 @@ type rtpDownConnection struct {
id string
pc *webrtc.PeerConnection
remote conn.Up
tracks []*rtpDownTrack
maxREMBBitrate *bitrate
iceCandidates []*webrtc.ICECandidateInit
negotiationNeeded int
mu sync.Mutex
tracks []*rtpDownTrack
}
func (down *rtpDownConnection) getTracks() []*rtpDownTrack {
down.mu.Lock()
defer down.mu.Unlock()
tracks := make([]*rtpDownTrack, len(down.tracks))
copy(tracks, down.tracks)
return tracks
}
func newDownConn(c group.Client, id string, remote conn.Up) (*rtpDownConnection, error) {
@ -169,7 +179,8 @@ func newDownConn(c group.Client, id string, remote conn.Up) (*rtpDownConnection,
func (down *rtpDownConnection) GetMaxBitrate(now uint64) uint64 {
rate := down.maxREMBBitrate.Get(now)
var trackRate uint64
for _, t := range down.tracks {
tracks := down.getTracks()
for _, t := range tracks {
r := t.maxBitrate.Get(now)
if r == ^uint64(0) {
if t.track.Kind() == webrtc.RTPCodecTypeAudio {
@ -779,8 +790,7 @@ func rtcpUpListener(conn *rtpUpConnection, track *rtpUpTrack, r *webrtc.RTPRecei
}
func sendUpRTCP(conn *rtpUpConnection) error {
conn.mu.Lock()
defer conn.mu.Unlock()
tracks := conn.getTracks()
if len(conn.tracks) == 0 {
state := conn.pc.ConnectionState()
@ -793,7 +803,7 @@ func sendUpRTCP(conn *rtpUpConnection) error {
now := rtptime.Jiffies()
reports := make([]rtcp.ReceptionReport, 0, len(conn.tracks))
for _, t := range conn.tracks {
for _, t := range tracks {
updateUpTrack(t)
expected, lost, totalLost, eseqno := t.cache.GetStats(true)
if expected == 0 {
@ -832,18 +842,21 @@ func sendUpRTCP(conn *rtpUpConnection) error {
}
rate := ^uint64(0)
for _, l := range conn.local {
local := conn.getLocal()
for _, l := range local {
r := l.GetMaxBitrate(now)
if r < rate {
rate = r
}
}
if rate < group.MinBitrate {
rate = group.MinBitrate
}
var ssrcs []uint32
for _, t := range conn.tracks {
for _, t := range tracks {
if t.hasRtcpFb("goog-remb", "") {
continue
}
@ -869,21 +882,21 @@ func rtcpUpSender(conn *rtpUpConnection) {
if err == io.EOF || err == io.ErrClosedPipe {
return
}
log.Printf("sendRR: %v", err)
log.Printf("sendUpRTCP: %v", err)
}
}
}
func sendSR(conn *rtpDownConnection) error {
// since this is only called after all tracks have been created,
// there is no need for locking.
packets := make([]rtcp.Packet, 0, len(conn.tracks))
tracks := conn.getTracks()
packets := make([]rtcp.Packet, 0, len(tracks))
now := time.Now()
nowNTP := rtptime.TimeToNTP(now)
jiffies := rtptime.TimeToJiffies(now)
for _, t := range conn.tracks {
for _, t := range tracks {
clockrate := t.track.Codec().ClockRate
var nowRTP uint32

View file

@ -419,7 +419,10 @@ func addDownTrack(c *webClient, conn *rtpDownConnection, remoteTrack conn.UpTrac
rate: estimator.New(time.Second),
atomics: &downTrackAtomics{},
}
conn.mu.Lock()
conn.tracks = append(conn.tracks, track)
conn.mu.Unlock()
go rtcpDownListener(conn, track, sender)