qrtplib::RTPRandom Class Reference

#include <rtprandom.h>

Inheritance diagram for qrtplib::RTPRandom:

Public Member Functions
	RTPRandom ()
virtual	~RTPRandom ()
virtual uint8_t	GetRandom8 ()=0
virtual uint16_t	GetRandom16 ()=0
virtual uint32_t	GetRandom32 ()=0
virtual double	GetRandomDouble ()=0
uint32_t	PickSeed ()

Static Public Member Functions
static RTPRandom *	CreateDefaultRandomNumberGenerator ()

Detailed Description

Interface for generating random numbers.

Definition at line 53 of file rtprandom.h.

Constructor & Destructor Documentation

RTPRandom()

qrtplib::RTPRandom::RTPRandom ( )

inline

Definition at line 56 of file rtprandom.h.

    {
    }

~RTPRandom()

virtual qrtplib::RTPRandom::~RTPRandom ( )

inlinevirtual

Definition at line 59 of file rtprandom.h.

    {
    }

Member Function Documentation

CreateDefaultRandomNumberGenerator()

RTPRandom * qrtplib::RTPRandom::CreateDefaultRandomNumberGenerator ( )

static

Allocate a default random number generator based on your platform.

Definition at line 73 of file rtprandom.cpp.

References qrtplib::RTPRandomURandom::Init().

Referenced by qrtplib::RTPSession::GetRandomNumberGenerator().

{
    RTPRandomURandom *r = new RTPRandomURandom();
    RTPRandom *rRet = r;

    if (r->Init() < 0) // fall back to rand48
    {
        delete r;
        rRet = new RTPRandomRand48();
    }

    return rRet;
}

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GetRandom16()

virtual uint16_t qrtplib::RTPRandom::GetRandom16 ( )

pure virtual

Returns a random sixteen bit value.

Implemented in qrtplib::RTPRandomRandS, qrtplib::RTPRandomURandom, and qrtplib::RTPRandomRand48.

Referenced by qrtplib::RTPPacketBuilder::CreateNewSSRC().

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GetRandom32()

virtual uint32_t qrtplib::RTPRandom::GetRandom32 ( )

pure virtual

Returns a random thirty-two bit value.

Implemented in qrtplib::RTPRandomRandS, qrtplib::RTPRandomURandom, and qrtplib::RTPRandomRand48.

Referenced by qrtplib::RTPPacketBuilder::CreateNewSSRC().

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GetRandom8()

virtual uint8_t qrtplib::RTPRandom::GetRandom8 ( )

pure virtual

Returns a random eight bit value.

Implemented in qrtplib::RTPRandomRandS, qrtplib::RTPRandomURandom, and qrtplib::RTPRandomRand48.

GetRandomDouble()

virtual double qrtplib::RTPRandom::GetRandomDouble ( )

pure virtual

Returns a random number between $0.0$ and $1.0$.

Implemented in qrtplib::RTPRandomRandS, qrtplib::RTPRandomURandom, and qrtplib::RTPRandomRand48.

Referenced by qrtplib::RTCPScheduler::CalculateBYETransmissionInterval(), and qrtplib::RTCPScheduler::CalculateTransmissionInterval().

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PickSeed()

uint32_t qrtplib::RTPRandom::PickSeed

(

)

Can be used by subclasses to generate a seed for a random number generator.

Definition at line 54 of file rtprandom.cpp.

Referenced by qrtplib::RTPRandomRand48::RTPRandomRand48().

{
    uint32_t x;
#ifdef _MSC_VER
    x = GetCurrentProcessId();
#else
    x = (uint32_t) getpid();
#endif
    QDateTime currentDateTime = QDateTime::currentDateTime();
    x += currentDateTime.toTime_t();
#if defined(WIN32)
    x += QDateTime::currentMSecsSinceEpoch() % 1000;
#else
    x += (uint32_t)clock();
#endif
    x ^= (uint32_t)((uint8_t *)this - (uint8_t *)0);
    return x;
}

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---

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

• qrtplib/rtprandom.h
• qrtplib/rtprandom.cpp