README


Pion RTP

A Go implementation of RTP

Pion RTP Sourcegraph Widget Slack Widget
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Roadmap

The library is used as a part of our WebRTC implementation. Please refer to that roadmap to track our major milestones.

Community

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Contributing

Check out the contributing wiki to join the group of amazing people making this project possible:

License

MIT License - see LICENSE for full text

Documentation

Overview

Package rtp provides RTP packetizer and depacketizer

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type AbsSendTimeExtension

type AbsSendTimeExtension struct {
	Timestamp uint64
}

AbsSendTimeExtension is a extension payload format in http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

func NewAbsSendTimeExtension

func NewAbsSendTimeExtension(sendTime time.Time) *AbsSendTimeExtension

NewAbsSendTimeExtension makes new AbsSendTimeExtension from time.Time.

func (*AbsSendTimeExtension) Estimate

func (t *AbsSendTimeExtension) Estimate(receive time.Time) time.Time

Estimate absolute send time according to the receive time. Note that if the transmission delay is larger than 64 seconds, estimated time will be wrong.

func (*AbsSendTimeExtension) Marshal

func (t *AbsSendTimeExtension) Marshal() ([]byte, error)

Marshal serializes the members to buffer.

func (*AbsSendTimeExtension) Unmarshal

func (t *AbsSendTimeExtension) Unmarshal(rawData []byte) error

Unmarshal parses the passed byte slice and stores the result in the members.

type AudioLevelExtension

type AudioLevelExtension struct {
	Level uint8
	Voice bool
}

AudioLevelExtension is a extension payload format described in https://tools.ietf.org/html/rfc6464

Implementation based on: https://chromium.googlesource.com/external/webrtc/+/e2a017725570ead5946a4ca8235af27470ca0df9/webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc#49

One byte format: 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ID | len=0 |V| level | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Two byte format: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ID | len=1 |V| level | 0 (pad) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

func (*AudioLevelExtension) Marshal

func (a *AudioLevelExtension) Marshal() ([]byte, error)

Marshal serializes the members to buffer

func (*AudioLevelExtension) Unmarshal

func (a *AudioLevelExtension) Unmarshal(rawData []byte) error

Unmarshal parses the passed byte slice and stores the result in the members

type Depacketizer

type Depacketizer interface {
	IsDetectedFinalPacketInSequence(rtpPacketMarketBit bool) bool
	Unmarshal(packet []byte) ([]byte, error)
}

Depacketizer depacketizes a RTP payload, removing any RTP specific data from the payload

type Extension

type Extension struct {
	// contains filtered or unexported fields
}

Extension RTP Header extension

type Header struct {
	Version          uint8
	Padding          bool
	Extension        bool
	Marker           bool
	PayloadOffset    int
	PayloadType      uint8
	SequenceNumber   uint16
	Timestamp        uint32
	SSRC             uint32
	CSRC             []uint32
	ExtensionProfile uint16
	Extensions       []Extension
}

Header represents an RTP packet header NOTE: PayloadOffset is populated by Marshal/Unmarshal and should not be modified

func (*Header) DelExtension

func (h *Header) DelExtension(id uint8) error

DelExtension Removes an RTP Header extension

func (*Header) GetExtension

func (h *Header) GetExtension(id uint8) []byte

GetExtension returns an RTP header extension

func (*Header) GetExtensionIDs

func (h *Header) GetExtensionIDs() []uint8

GetExtensionIDs returns an extension id array

func (*Header) Marshal

func (h *Header) Marshal() (buf []byte, err error)

Marshal serializes the header into bytes.

func (*Header) MarshalSize

func (h *Header) MarshalSize() int

MarshalSize returns the size of the header once marshaled.

func (*Header) MarshalTo

func (h *Header) MarshalTo(buf []byte) (n int, err error)

MarshalTo serializes the header and writes to the buffer.

func (*Header) SetExtension

func (h *Header) SetExtension(id uint8, payload []byte) error

SetExtension sets an RTP header extension

func (*Header) Unmarshal

func (h *Header) Unmarshal(rawPacket []byte) error

Unmarshal parses the passed byte slice and stores the result in the Header this method is called upon

type Packet

type Packet struct {
	Header
	Raw     []byte
	Payload []byte
}

Packet represents an RTP Packet NOTE: Raw is populated by Marshal/Unmarshal and should not be modified

func (*Packet) Marshal

func (p *Packet) Marshal() (buf []byte, err error)

Marshal serializes the packet into bytes.

func (*Packet) MarshalSize

func (p *Packet) MarshalSize() int

MarshalSize returns the size of the packet once marshaled.

func (*Packet) MarshalTo

func (p *Packet) MarshalTo(buf []byte) (n int, err error)

MarshalTo serializes the packet and writes to the buffer.

func (Packet) String

func (p Packet) String() string

String helps with debugging by printing packet information in a readable way

func (*Packet) Unmarshal

func (p *Packet) Unmarshal(rawPacket []byte) error

Unmarshal parses the passed byte slice and stores the result in the Packet this method is called upon

type Packetizer

type Packetizer interface {
	Packetize(payload []byte, samples uint32) []*Packet
	EnableAbsSendTime(value int)
	SkipSamples(skippedSamples uint32)
}

Packetizer packetizes a payload

func NewPacketizer

func NewPacketizer(mtu int, pt uint8, ssrc uint32, payloader Payloader, sequencer Sequencer, clockRate uint32) Packetizer

NewPacketizer returns a new instance of a Packetizer for a specific payloader

type PartitionHeadChecker

type PartitionHeadChecker interface {
	IsPartitionHead([]byte) bool
}

PartitionHeadChecker is the interface that checks whether the packet is keyframe or not

type Payloader

type Payloader interface {
	Payload(mtu int, payload []byte) [][]byte
}

Payloader payloads a byte array for use as rtp.Packet payloads

type Sequencer

type Sequencer interface {
	NextSequenceNumber() uint16
	RollOverCount() uint64
}

Sequencer generates sequential sequence numbers for building RTP packets

func NewFixedSequencer

func NewFixedSequencer(s uint16) Sequencer

NewFixedSequencer returns a new sequencer starting from a specific sequence number

func NewRandomSequencer

func NewRandomSequencer() Sequencer

NewRandomSequencer returns a new sequencer starting from a random sequence number

type TransportCCExtension

type TransportCCExtension struct {
	TransportSequence uint16
}

TransportCCExtension is a extension payload format in https://tools.ietf.org/html/draft-holmer-rmcat-transport-wide-cc-extensions-01 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 0xBE | 0xDE | length=1 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ID | L=1 |transport-wide sequence number | zero padding | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

func (*TransportCCExtension) Marshal

func (t *TransportCCExtension) Marshal() ([]byte, error)

Marshal serializes the members to buffer

func (*TransportCCExtension) Unmarshal

func (t *TransportCCExtension) Unmarshal(rawData []byte) error

Unmarshal parses the passed byte slice and stores the result in the members

Directories

Path Synopsis
Package codecs implements codec specific RTP payloader/depayloaders
Package codecs implements codec specific RTP payloader/depayloaders