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81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
/*
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This file is a part of JRTPLIB
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Copyright (c) 1999-2017 Jori Liesenborgs
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Contact: jori.liesenborgs@gmail.com
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This library was developed at the Expertise Centre for Digital Media
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(http://www.edm.uhasselt.be), a research center of the Hasselt University
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(http://www.uhasselt.be). The library is based upon work done for
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my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#if defined(WIN32) && !defined(_WIN32_WCE)
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#define _CRT_RAND_S
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#endif // WIN32 || _WIN32_WCE
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#include "rtprandom.h"
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#include "rtprandomrands.h"
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#include "rtprandomurandom.h"
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#include "rtprandomrand48.h"
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#include <time.h>
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#include <unistd.h>
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#include <QDateTime>
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namespace qrtplib
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{
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uint32_t RTPRandom::PickSeed()
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{
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uint32_t x;
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x = (uint32_t) getpid();
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QDateTime currentDateTime = QDateTime::currentDateTime();
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x += currentDateTime.toTime_t();
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#if defined(WIN32)
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x += QDateTime::currentMSecsSinceEpoch() % 1000;
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#else
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x += (uint32_t)clock();
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#endif
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x ^= (uint32_t)((uint8_t *)this - (uint8_t *)0);
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return x;
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}
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RTPRandom *RTPRandom::CreateDefaultRandomNumberGenerator()
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{
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RTPRandomURandom *r = new RTPRandomURandom();
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RTPRandom *rRet = r;
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if (r->Init() < 0) // fall back to rand48
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{
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delete r;
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rRet = new RTPRandomRand48();
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}
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return rRet;
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}
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} // end namespace
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