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rtcp sender/report: do not send reports until all needed data is available

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This commit is contained in:
aler9
2022-04-08 16:30:51 +02:00
parent f4efe9ceb5
commit 5b37e9d5bb
2 changed files with 34 additions and 31 deletions
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39
pkg/rtcpreceiver/rtcpreceiver.go
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@@ -29,8 +29,8 @@ type RTCPReceiver struct {
// data from RTP packets
firstRTPReceived bool
sequenceNumberCycles uint16
lastSequenceNumber uint16
lastRTPTimeRTP uint32
lastSequenceNumber *uint16
lastRTPTimeRTP *uint32
lastRTPTimeTime time.Time
totalLost uint32
totalLostSinceReport uint32
@@ -39,7 +39,7 @@ type RTCPReceiver struct {
// data from rtcp packets
senderSSRC uint32
lastSenderReport uint32
lastSenderReportRTP *uint32
lastSenderReportTime time.Time
terminate chan struct{}
@@ -99,8 +99,7 @@ func (rr *RTCPReceiver) report(ts time.Time) rtcp.Packet {
rr.mutex.Lock()
defer rr.mutex.Unlock()
var zero time.Time
if rr.lastSenderReportTime == zero {
if rr.lastSenderReportRTP == nil || rr.lastSequenceNumber == nil {
return nil
}
@@ -109,8 +108,8 @@ func (rr *RTCPReceiver) report(ts time.Time) rtcp.Packet {
Reports: []rtcp.ReceptionReport{
{
SSRC: rr.senderSSRC,
LastSequenceNumber: uint32(rr.sequenceNumberCycles)<<16 | uint32(rr.lastSequenceNumber),
LastSenderReport: rr.lastSenderReport,
LastSequenceNumber: uint32(rr.sequenceNumberCycles)<<16 | uint32(*rr.lastSequenceNumber),
LastSenderReport: *rr.lastSenderReportRTP,
// equivalent to taking the integer part after multiplying the
// loss fraction by 256
FractionLost: uint8(float64(rr.totalLostSinceReport*256) / float64(rr.totalSinceReport)),
@@ -136,19 +135,21 @@ func (rr *RTCPReceiver) ProcessPacketRTP(ts time.Time, pkt *rtp.Packet, ptsEqual
defer rr.mutex.Unlock()
// first packet
if !rr.firstRTPReceived {
if rr.lastSequenceNumber == nil {
rr.firstRTPReceived = true
rr.totalSinceReport = 1
rr.lastSequenceNumber = pkt.Header.SequenceNumber
v := pkt.Header.SequenceNumber
rr.lastSequenceNumber = &v
if ptsEqualsDTS {
rr.lastRTPTimeRTP = pkt.Header.Timestamp
v := pkt.Header.Timestamp
rr.lastRTPTimeRTP = &v
rr.lastRTPTimeTime = ts
}
// subsequent packets
} else {
diff := int32(pkt.Header.SequenceNumber) - int32(rr.lastSequenceNumber)
diff := int32(pkt.Header.SequenceNumber) - int32(*rr.lastSequenceNumber)
// following packet or following packet after an overflow
if diff > 0 || diff < -0x0FFF {
@@ -158,7 +159,7 @@ func (rr *RTCPReceiver) ProcessPacketRTP(ts time.Time, pkt *rtp.Packet, ptsEqual
}
// detect lost packets
if pkt.Header.SequenceNumber != (rr.lastSequenceNumber + 1) {
if pkt.Header.SequenceNumber != (*rr.lastSequenceNumber + 1) {
rr.totalLost += uint32(uint16(diff) - 1)
rr.totalLostSinceReport += uint32(uint16(diff) - 1)
@@ -172,22 +173,23 @@ func (rr *RTCPReceiver) ProcessPacketRTP(ts time.Time, pkt *rtp.Packet, ptsEqual
}
rr.totalSinceReport += uint32(uint16(diff))
rr.lastSequenceNumber = pkt.Header.SequenceNumber
v := pkt.Header.SequenceNumber
rr.lastSequenceNumber = &v
if ptsEqualsDTS {
var zero time.Time
if rr.lastRTPTimeTime != zero {
if rr.lastRTPTimeRTP != nil {
// update jitter
// https://tools.ietf.org/html/rfc3550#page-39
D := ts.Sub(rr.lastRTPTimeTime).Seconds()*rr.clockRate -
(float64(pkt.Header.Timestamp) - float64(rr.lastRTPTimeRTP))
(float64(pkt.Header.Timestamp) - float64(*rr.lastRTPTimeRTP))
if D < 0 {
D = -D
}
rr.jitter += (D - rr.jitter) / 16
}
rr.lastRTPTimeRTP = pkt.Header.Timestamp
v := pkt.Header.Timestamp
rr.lastRTPTimeRTP = &v
rr.lastRTPTimeTime = ts
}
}
@@ -202,7 +204,8 @@ func (rr *RTCPReceiver) ProcessPacketRTCP(ts time.Time, pkt rtcp.Packet) {
defer rr.mutex.Unlock()
rr.senderSSRC = sr.SSRC
rr.lastSenderReport = uint32(sr.NTPTime >> 16)
v := uint32(sr.NTPTime >> 16)
rr.lastSenderReportRTP = &v
rr.lastSenderReportTime = ts
}
}