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73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <curand.h>
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#include <string>
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// RNGs
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class RNG
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{
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public:
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enum RngType {Pseudo, Quasi, ScrambledQuasi};
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RNG(unsigned long prngSeed, unsigned int qrngDimensions, unsigned int nSamples);
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virtual ~RNG();
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float getNextU01(void);
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void getInfoString(std::string &msg);
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void selectRng(RngType type);
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void resetSeed(void);
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void resetDimensions(void);
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void incrementDimensions(void);
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private:
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// Generators
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curandGenerator_t *m_pCurrent;
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curandGenerator_t m_prng;
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curandGenerator_t m_qrng;
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curandGenerator_t m_sqrng;
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// Parameters
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unsigned long m_prngSeed;
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unsigned int m_qrngDimensions;
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// Batches
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const unsigned int m_nSamplesBatchTarget;
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unsigned int m_nSamplesBatchActual;
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unsigned int m_nSamplesRemaining;
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void generateBatch(void);
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// Helpers
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void updateDimensions(void);
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void setBatchSize(void);
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// Buffers
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float *m_h_samples;
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float *m_d_samples;
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static const unsigned int s_maxQrngDimensions;
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};
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