ophWRP_GPU.h

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#pragma once
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//#ifndef __ophWRP_GPU_h
//#define __ophWRP_GPU_h

#include "ophWRP.h"

#define __DEBUG_LOG_GPU_SPEC_

#include <cuda_runtime_api.h>
#include <cufft.h>

#define __CUDA_INTERNAL_COMPILATION__ //for CUDA Math Module
#include <math_constants.h>
//#include <math_functions_dbl_ptx3.h> //Double Precision Floating
#include <vector_functions.h> //Vector Processing Function
#undef __CUDA_INTERNAL_COMPILATION__

static void HandleError(cudaError_t err,
    const char *file,
    int line) {
    if (err != cudaSuccess) {
        printf("%s in %s at line %d\n", cudaGetErrorString(err),
            file, line);
        exit(EXIT_FAILURE);
    }
}
#define HANDLE_ERROR( err ) (HandleError( err, __FILE__, __LINE__ ))


#define HANDLE_NULL( a ) {if (a == NULL) { \
                            printf( "Host memory failed in %s at line %d\n", \
                                    __FILE__, __LINE__ ); \
                            exit( EXIT_FAILURE );}} 

// for PointCloud only GPU
typedef struct KernelConst {
    int n_points;   
    int n_colors;   
    int n_streams;  

    Real wrp_d; 
    Real propa_d;  

    int pn_X;       
    int pn_Y;       

    double pp_X; 
    double pp_Y; 

    double k;         
    double lambda;    

    Real zmax;
    bool bRandomPhase;  // use random phase
    int iAmplitude;

    double pi2;
    double tx;
    double ty;
    double det_tx;
    double det_ty;

    KernelConst(
        const int &n_points,        
        const int &n_colors,        
        const int &n_streams,
        const ivec2 &pixel_number,  
        const vec2 &pixel_pitch,    
        const Real wrp_dis,    
        const Real propagation_distance, 
        const Real depth_max,
        const Real &k,              
        const Real &lambda,        
        const bool &random_phase,
        const int &index_amplitude
    )
    {
        this->lambda = lambda;

        this->n_points = n_points;
        this->n_colors = n_colors;
        this->n_streams = n_streams;

        // Output Image Size
        this->pn_X = pixel_number[_X];
        this->pn_Y = pixel_number[_Y];

        // Pixel pitch at eyepiece lens plane (by simple magnification) ==> SLM pitch
        this->pp_X = pixel_pitch[_X];
        this->pp_Y = pixel_pitch[_Y];

        // WRP 
        this->wrp_d = wrp_dis;
        this->propa_d = propagation_distance;
        this->zmax = depth_max;

        // Wave Number
        this->k = k;

        this->lambda = lambda;

        // Random Phase
        this->bRandomPhase = random_phase;

        // Amplitude index
        this->iAmplitude = index_amplitude;

        this->pi2 = M_PI * 2;

        this->tx = lambda / (2 * pp_X);
        this->ty = lambda / (2 * pp_Y);
        this->det_tx = tx / sqrt(1 - tx * tx);
        this->det_ty = ty / sqrt(1 - ty * ty);

    }
} WRPGpuConst;

//cufftDoubleComplex *p_wrp_gpu_;


extern "C"
{
    void cudaFresnelPropagationWRP(
        const int &nBlocks, const int &nBlocks2, const int &nThreads, const int &nx, const int &ny,
        cuDoubleComplex *src, cuDoubleComplex *dst, cufftDoubleComplex *fftsrc, cufftDoubleComplex *fftdst,
        const WRPGpuConst* cuda_config);

    void cudaGenWRP(
        const int &nBlocks, const int &nThreads, const int &n_pts_per_stream,
        //Real* cuda_pc_data, Real* cuda_amp_data,
        Vertex* cuda_pc_data,
        cuDoubleComplex* cuda_dst, const WRPGpuConst* cuda_config);
}