qrtplib::RTCPAPPPacket Class Reference

#include <rtcpapppacket.h>

Inheritance diagram for qrtplib::RTCPAPPPacket:

Collaboration diagram for qrtplib::RTCPAPPPacket:

Public Member Functions
	RTCPAPPPacket (uint8_t *data, std::size_t datalen)
	~RTCPAPPPacket ()
uint8_t	GetSubType () const
uint32_t	GetSSRC () const
uint8_t *	GetName ()
uint8_t *	GetAPPData ()
std::size_t	GetAPPDataLength () const
Public Member Functions inherited from qrtplib::RTCPPacket
virtual	~RTCPPacket ()
bool	IsKnownFormat () const
PacketType	GetPacketType () const
uint8_t *	GetPacketData ()
std::size_t	GetPacketLength () const

Private Attributes
RTPEndian	m_endian
std::size_t	appdatalen

Additional Inherited Members
Public Types inherited from qrtplib::RTCPPacket
enum	PacketType {   SR, RR, SDES, BYE,   APP, Unknown }
Protected Member Functions inherited from qrtplib::RTCPPacket
	RTCPPacket (PacketType t, uint8_t *d, std::size_t dlen)
Protected Attributes inherited from qrtplib::RTCPPacket
uint8_t *	data
std::size_t	datalen
bool	knownformat

Detailed Description

Describes an RTCP APP packet.

Definition at line 54 of file rtcpapppacket.h.

Constructor & Destructor Documentation

RTCPAPPPacket()

qrtplib::RTCPAPPPacket::RTCPAPPPacket	(	uint8_t *	data,
		std::size_t	datalen
	)

Creates an instance based on the data in data with length datalen. Creates an instance based on the data in data with length datalen. Since the data pointer is referenced inside the class (no copy of the data is made) one must make sure that the memory it points to is valid as long as the class instance exists.

Definition at line 38 of file rtcpapppacket.cpp.

References appdatalen, qrtplib::RTCPPacket::knownformat, and qrtplib::RTCPCommonHeader::padding.

                                                                :
        RTCPPacket(APP, data, datalength)
{
    knownformat = false;

    RTCPCommonHeader *hdr;
    std::size_t len = datalength;

    hdr = (RTCPCommonHeader *) data;
    if (hdr->padding)
    {
        uint8_t padcount = data[datalength - 1];
        if ((padcount & 0x03) != 0) // not a multiple of four! (see rfc 3550 p 37)
            return;
        if (((std::size_t) padcount) >= len)
            return;
        len -= (std::size_t) padcount;
    }

    if (len < (sizeof(RTCPCommonHeader) + sizeof(uint32_t) * 2))
        return;
    len -= (sizeof(RTCPCommonHeader) + sizeof(uint32_t) * 2);
    appdatalen = len;
    knownformat = true;
}

~RTCPAPPPacket()

qrtplib::RTCPAPPPacket::~RTCPAPPPacket ( )

inline

Definition at line 63 of file rtcpapppacket.h.

    {
    }

Member Function Documentation

GetAPPData()

uint8_t * qrtplib::RTCPAPPPacket::GetAPPData ( )

inline

Returns a pointer to the actual data.

Definition at line 113 of file rtcpapppacket.h.

{
    if (!knownformat)
        return 0;
    if (appdatalen == 0)
        return 0;
    return (data + sizeof(RTCPCommonHeader) + sizeof(uint32_t) * 2);
}

GetAPPDataLength()

std::size_t qrtplib::RTCPAPPPacket::GetAPPDataLength ( ) const

inline

Returns the length of the actual data.

Definition at line 122 of file rtcpapppacket.h.

{
    if (!knownformat)
        return 0;
    return appdatalen;
}

GetName()

uint8_t * qrtplib::RTCPAPPPacket::GetName ( )

inline

Returns the name contained in the APP packet. Returns the name contained in the APP packet. This alway consists of four bytes and is not NULL-terminated.

Definition at line 105 of file rtcpapppacket.h.

{
    if (!knownformat)
        return 0;

    return (data + sizeof(RTCPCommonHeader) + sizeof(uint32_t));
}

GetSSRC()

uint32_t qrtplib::RTCPAPPPacket::GetSSRC ( ) const

inline

Returns the SSRC of the source which sent this packet.

Definition at line 96 of file rtcpapppacket.h.

{
    if (!knownformat)
        return 0;

    uint32_t *ssrc = (uint32_t *) (data + sizeof(RTCPCommonHeader));
    return m_endian.qToHost(*ssrc);
}

GetSubType()

uint8_t qrtplib::RTCPAPPPacket::GetSubType ( ) const

inline

Returns the subtype contained in the APP packet.

Definition at line 88 of file rtcpapppacket.h.

References qrtplib::RTCPCommonHeader::count.

{
    if (!knownformat)
        return 0;
    RTCPCommonHeader *hdr = (RTCPCommonHeader *) data;
    return hdr->count;
}

Member Data Documentation

appdatalen

std::size_t qrtplib::RTCPAPPPacket::appdatalen

private

Definition at line 85 of file rtcpapppacket.h.

Referenced by RTCPAPPPacket().

m_endian

RTPEndian qrtplib::RTCPAPPPacket::m_endian

private

Definition at line 84 of file rtcpapppacket.h.

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The documentation for this class was generated from the following files:

• qrtplib/rtcpapppacket.h
• qrtplib/rtcpapppacket.cpp