qrtplib::RTCPRRPacket Class Reference

#include <rtcprrpacket.h>

Inheritance diagram for qrtplib::RTCPRRPacket:

Collaboration diagram for qrtplib::RTCPRRPacket:

Public Member Functions
	RTCPRRPacket (uint8_t *data, std::size_t datalen)
	~RTCPRRPacket ()
uint32_t	GetSenderSSRC () const
int	GetReceptionReportCount () const
uint32_t	GetSSRC (int index) const
uint8_t	GetFractionLost (int index) const
int32_t	GetLostPacketCount (int index) const
uint32_t	GetExtendedHighestSequenceNumber (int index) const
uint32_t	GetJitter (int index) const
uint32_t	GetLSR (int index) const
uint32_t	GetDLSR (int index) 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 Member Functions
RTCPReceiverReport *	GotoReport (int index) const

Private Attributes
RTPEndian	m_endian

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 receiver report packet.

Definition at line 54 of file rtcprrpacket.h.

Constructor & Destructor Documentation

RTCPRRPacket()

qrtplib::RTCPRRPacket::RTCPRRPacket	(	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 rtcprrpacket.cpp.

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

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

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

    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;
    }

    expectedlength = sizeof(RTCPCommonHeader) + sizeof(uint32_t);
    expectedlength += sizeof(RTCPReceiverReport) * ((int) hdr->count);

    if (expectedlength != len)
        return;

    knownformat = true;
}

~RTCPRRPacket()

qrtplib::RTCPRRPacket::~RTCPRRPacket ( )

inline

Definition at line 63 of file rtcprrpacket.h.

    {
    }

Member Function Documentation

GetDLSR()

uint32_t qrtplib::RTCPRRPacket::GetDLSR ( int  index ) const

inline

Returns the DLSR field of the reception report block described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 195 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::dlsr.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    return m_endian.qToHost(r->dlsr);
}

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GetExtendedHighestSequenceNumber()

uint32_t qrtplib::RTCPRRPacket::GetExtendedHighestSequenceNumber ( int  index ) const

inline

Returns the extended highest sequence number of the reception report block described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 171 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::exthighseqnr.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    return m_endian.qToHost(r->exthighseqnr);
}

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GetFractionLost()

uint8_t qrtplib::RTCPRRPacket::GetFractionLost ( int  index ) const

inline

Returns the `fraction lost' field of the reception report described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 151 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::fractionlost.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    return r->fractionlost;
}

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GetJitter()

uint32_t qrtplib::RTCPRRPacket::GetJitter ( int  index ) const

inline

Returns the jitter field of the reception report block described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 179 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::jitter.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    return m_endian.qToHost(r->jitter);
}

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GetLostPacketCount()

int32_t qrtplib::RTCPRRPacket::GetLostPacketCount ( int  index ) const

inline

Returns the number of lost packets in the reception report block described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 159 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::packetslost.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    uint32_t count = ((uint32_t) r->packetslost[2]) | (((uint32_t) r->packetslost[1]) << 8) | (((uint32_t) r->packetslost[0]) << 16);
    if ((count & 0x00800000) != 0) // test for negative number
        count |= 0xFF000000;
    int32_t *count2 = (int32_t *) (&count);
    return (*count2);
}

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GetLSR()

uint32_t qrtplib::RTCPRRPacket::GetLSR ( int  index ) const

inline

Returns the LSR field of the reception report block described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 187 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::lsr.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    return m_endian.qToHost(r->lsr);
}

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GetReceptionReportCount()

int qrtplib::RTCPRRPacket::GetReceptionReportCount ( ) const

inline

Returns the number of reception report blocks present in this packet.

Definition at line 129 of file rtcprrpacket.h.

References qrtplib::RTCPCommonHeader::count.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

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

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GetSenderSSRC()

uint32_t qrtplib::RTCPRRPacket::GetSenderSSRC ( ) const

inline

Returns the SSRC of the participant who sent this packet.

Definition at line 121 of file rtcprrpacket.h.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;

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

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GetSSRC()

uint32_t qrtplib::RTCPRRPacket::GetSSRC ( int  index ) const

inline

Returns the SSRC of the reception report block described by index which may have a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if index is valid).

Definition at line 143 of file rtcprrpacket.h.

References qrtplib::RTCPReceiverReport::ssrc.

Referenced by qrtplib::RTPSources::ProcessRTCPCompoundPacket().

{
    if (!knownformat)
        return 0;
    RTCPReceiverReport *r = GotoReport(index);
    return m_endian.qToHost(r->ssrc);
}

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GotoReport()

RTCPReceiverReport * qrtplib::RTCPRRPacket::GotoReport ( int  index ) const

inlineprivate

Definition at line 137 of file rtcprrpacket.h.

{
    RTCPReceiverReport *r = (RTCPReceiverReport *) (data + sizeof(RTCPCommonHeader) + sizeof(uint32_t) + index * sizeof(RTCPReceiverReport));
    return r;
}

Member Data Documentation

m_endian

RTPEndian qrtplib::RTCPRRPacket::m_endian

private

Definition at line 118 of file rtcprrpacket.h.

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

• qrtplib/rtcprrpacket.h
• qrtplib/rtcprrpacket.cpp