RtpHeader

class

This class represents an RTP data packet. Real data can either be encapsulated, or simulated by adding length.

The following RTP header fields exist but aren't used: padding, extension, csrcCount. The csrcList can't be used because csrcCount is always 0.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Extends

Name	Type	Description
FieldsChunk	class	(no description)

Fields

Name	Type	Description
chunkLength	b
version	uint8_t	The rtp version of this RtpPacket.
paddingFlag	bool	Set to 1 if padding is used in this RtpPacket, 0 otherwise. This implementation doesn't use padding bytes, so it is always 0.
extensionFlag	bool	Set to 1, if this RtpPacket contains an rtp header extension, 0 otherwise. This implementation doesn't support rtp header extensions, so it is always 0.
marker	bool	The marker.
payloadType	int8_t	The type of payload carried in this RtpPacket.
sequenceNumber	uint16_t	The sequence number of this RtpPacket.
timeStamp	uint32_t	The rtp time stamp of this RtpPacket.
ssrc	uint32_t	The ssrc identifier of the creator of this RtpPacket.
csrc	uint32_t[]	no mixers, no contributing sources
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
rawBin	string[]
rawHex	string[]
tags	RegionTagSet::cObjectRegionTag[]

Source code

//
// This class represents an RTP data packet. Real data can either
// be encapsulated, or simulated by adding length.
//
// The following RTP header fields exist but aren't used:
// padding, extension, csrcCount. The csrcList can't be used
// because csrcCount is always 0.
//
class RtpHeader extends FieldsChunk
{
    chunkLength = RTPPACKET_FIX_HEADERLENGTH;  // 12-byte fixed header

    // The rtp version of this ~RtpPacket.
    uint8_t version = 2;      // 2 bits

    // Set to 1 if padding is used in this ~RtpPacket, 0 otherwise.
    // This implementation doesn't use padding bytes, so it is always 0.
    bool paddingFlag = false;      // 1 bit

    // Set to 1, if this ~RtpPacket contains an rtp header extension, 0 otherwise.
    // This implementation doesn't support rtp header extensions, so it is always 0.
    bool extensionFlag = false;      // 1 bit

    // uint8_t cc;      // 4 bits, csrc count

    // The marker.
    bool marker = false;      // 1 bit

    // The type of payload carried in this ~RtpPacket.
    int8_t payloadType;      // 7 bits

    // The sequence number of this ~RtpPacket.
    uint16_t sequenceNumber;      // 16 bits

    // The rtp time stamp of this ~RtpPacket.
    uint32_t timeStamp;      // 32 bits

    // The ssrc identifier of the creator of this ~RtpPacket.
    uint32_t ssrc;      // 32 bits

    // no mixers, no contributing sources
    uint32_t csrc[];      // cc * 32 bits
}

File: src/inet/transportlayer/rtp/RtpPacket.msg