mirror of
https://github.com/livekit/livekit.git
synced 2026-05-11 01:47:18 +00:00
Raja Subramanian
4b16017d09
* WIP * no worker * fixes * use congested packet groups * oldest group * markers * WIP * WIP * WIP * WIP * WIP * clean up * fmt * consolidate * store last packet only for bwe extension cases
128 lines
2.9 KiB
Go
128 lines
2.9 KiB
Go
// Copyright 2023 LiveKit, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package pacer
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
"time"
|
|
|
|
"github.com/livekit/livekit-server/pkg/sfu/bwe"
|
|
"github.com/livekit/protocol/logger"
|
|
"github.com/livekit/protocol/utils/mono"
|
|
"github.com/pion/rtp"
|
|
"go.uber.org/atomic"
|
|
)
|
|
|
|
type Base struct {
|
|
logger logger.Logger
|
|
|
|
bwe bwe.BWE
|
|
|
|
lastPacketSentAt atomic.Int64
|
|
|
|
*ProbeObserver
|
|
}
|
|
|
|
func NewBase(logger logger.Logger, bwe bwe.BWE) *Base {
|
|
return &Base{
|
|
logger: logger,
|
|
bwe: bwe,
|
|
ProbeObserver: NewProbeObserver(logger),
|
|
}
|
|
}
|
|
|
|
func (b *Base) SetInterval(_interval time.Duration) {
|
|
}
|
|
|
|
func (b *Base) SetBitrate(_bitrate int) {
|
|
}
|
|
|
|
func (b *Base) TimeSinceLastSentPacket() time.Duration {
|
|
return time.Duration(mono.UnixNano() - b.lastPacketSentAt.Load())
|
|
}
|
|
|
|
func (b *Base) SendPacket(p *Packet) (int, error) {
|
|
defer func() {
|
|
if p.Pool != nil && p.PoolEntity != nil {
|
|
p.Pool.Put(p.PoolEntity)
|
|
}
|
|
}()
|
|
|
|
err := b.patchRTPHeaderExtensions(p)
|
|
if err != nil {
|
|
b.logger.Errorw("patching rtp header extensions err", err)
|
|
return 0, err
|
|
}
|
|
|
|
var written int
|
|
written, err = p.WriteStream.WriteRTP(p.Header, p.Payload)
|
|
if err != nil {
|
|
if !errors.Is(err, io.ErrClosedPipe) {
|
|
b.logger.Errorw("write rtp packet failed", err)
|
|
}
|
|
return 0, err
|
|
}
|
|
|
|
return written, nil
|
|
}
|
|
|
|
// patch just abs-send-time and transport-cc extensions if applicable
|
|
func (b *Base) patchRTPHeaderExtensions(p *Packet) error {
|
|
sendingAt := mono.Now()
|
|
if p.AbsSendTimeExtID != 0 {
|
|
absSendTime := rtp.NewAbsSendTimeExtension(sendingAt)
|
|
absSendTimeBytes, err := absSendTime.Marshal()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = p.Header.SetExtension(p.AbsSendTimeExtID, absSendTimeBytes); err != nil {
|
|
return err
|
|
}
|
|
|
|
b.lastPacketSentAt.Store(sendingAt.UnixNano())
|
|
}
|
|
|
|
packetSize := p.HeaderSize + len(p.Payload)
|
|
if p.TransportWideExtID != 0 && b.bwe != nil {
|
|
twccSN := b.bwe.RecordPacketSendAndGetSequenceNumber(
|
|
sendingAt.UnixMicro(),
|
|
packetSize,
|
|
p.IsRTX,
|
|
p.ProbeClusterId,
|
|
p.IsProbe,
|
|
)
|
|
twccExt := rtp.TransportCCExtension{
|
|
TransportSequence: twccSN,
|
|
}
|
|
twccExtBytes, err := twccExt.Marshal()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = p.Header.SetExtension(p.TransportWideExtID, twccExtBytes); err != nil {
|
|
return err
|
|
}
|
|
|
|
b.lastPacketSentAt.Store(sendingAt.UnixNano())
|
|
}
|
|
|
|
b.ProbeObserver.RecordPacket(packetSize, p.IsRTX, p.ProbeClusterId, p.IsProbe)
|
|
return nil
|
|
}
|
|
|
|
// ------------------------------------------------
|