mirror of
https://github.com/livekit/livekit.git
synced 2026-05-11 03:57:12 +00:00
Raja Subramanian
103 lines
2.3 KiB
Go
103 lines
2.3 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/protocol/logger"
|
|
"github.com/pion/rtp"
|
|
)
|
|
|
|
type Base struct {
|
|
logger logger.Logger
|
|
|
|
packetTime *PacketTime
|
|
}
|
|
|
|
func NewBase(logger logger.Logger) *Base {
|
|
return &Base{
|
|
logger: logger,
|
|
packetTime: NewPacketTime(),
|
|
}
|
|
}
|
|
|
|
func (b *Base) SetInterval(_interval time.Duration) {
|
|
}
|
|
|
|
func (b *Base) SetBitrate(_bitrate int) {
|
|
}
|
|
|
|
func (b *Base) SendPacket(p *Packet) (int, error) {
|
|
defer func() {
|
|
if p.Pool != nil && p.PoolEntity != nil {
|
|
p.Pool.Put(p.PoolEntity)
|
|
}
|
|
}()
|
|
|
|
_, err := b.writeRTPHeaderExtensions(p)
|
|
if err != nil {
|
|
b.logger.Errorw("writing 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
|
|
}
|
|
|
|
// writes RTP header extensions of track
|
|
func (b *Base) writeRTPHeaderExtensions(p *Packet) (time.Time, error) {
|
|
// clear out extensions that may have been in the forwarded header
|
|
p.Header.Extension = false
|
|
p.Header.ExtensionProfile = 0
|
|
p.Header.Extensions = []rtp.Extension{}
|
|
|
|
for _, ext := range p.Extensions {
|
|
if ext.ID == 0 || len(ext.Payload) == 0 {
|
|
continue
|
|
}
|
|
|
|
p.Header.SetExtension(ext.ID, ext.Payload)
|
|
}
|
|
|
|
sendingAt := b.packetTime.Get()
|
|
if p.AbsSendTimeExtID != 0 {
|
|
sendTime := rtp.NewAbsSendTimeExtension(sendingAt)
|
|
b, err := sendTime.Marshal()
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
|
|
err = p.Header.SetExtension(p.AbsSendTimeExtID, b)
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
}
|
|
|
|
return sendingAt, nil
|
|
}
|
|
|
|
// ------------------------------------------------
|