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galene/conn/conn.go
Juliusz Chroboczek 263258a0c1 Implement renegotiation of down streams.
We used to destroy and recreate down streams whenever something changed,
which turned out to be racy.  We now properly implement renegotiation,
as well as atomic replacement of a stream by another one.
2021-02-03 19:15:40 +01:00

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Go

// Package conn defines interfaces for connections and tracks.
package conn
import (
"errors"
"github.com/pion/rtp"
"github.com/pion/webrtc/v3"
)
var ErrConnectionClosed = errors.New("connection is closed")
var ErrKeyframeNeeded = errors.New("keyframe needed")
// Type Up represents a connection in the client to server direction.
type Up interface {
AddLocal(Down) error
DelLocal(Down) bool
Id() string
User() (string, string)
}
// Type UpTrack represents a track in the client to server direction.
type UpTrack interface {
AddLocal(DownTrack) error
DelLocal(DownTrack) bool
Label() string
Codec() webrtc.RTPCodecCapability
// get a recent packet. Returns 0 if the packet is not in cache.
GetRTP(seqno uint16, result []byte) uint16
Nack(conn Up, seqnos []uint16) error
}
// Type Down represents a connection in the server to client direction.
type Down interface {
GetMaxBitrate(now uint64) uint64
}
// Type DownTrack represents a track in the server to client direction.
type DownTrack interface {
WriteRTP(packat *rtp.Packet) error
Accumulate(bytes uint32)
SetTimeOffset(ntp uint64, rtp uint32)
SetCname(string)
}