ophDepthMap_GPU.h File Reference

Openholo Point Cloud based CGH generation with CUDA GPGPU. More...

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

Include dependency graph for ophDepthMap_GPU.h:

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Go to the source code of this file.

Classes
struct	DMKernelConfig

Macros
#define	__DEBUG_LOG_GPU_SPEC_
#define	HANDLE_ERROR(err)   (HandleError( err, __FILE__, __LINE__ ))
#define	HANDLE_NULL(a)

Typedefs
typedef struct DMKernelConfig	DMKernelConfig

Functions
void	cudaDepthHoloKernel (CUstream_st *stream, int nx, int ny, cufftDoubleComplex *u_o_gpu_, unsigned char *img_src_gpu, unsigned char *dimg_src_gpu, Real *depth_index_gpu, int dtr, cuDoubleComplex rand_phase_val, cuDoubleComplex carrier_phase_delay, int flag_change_depth_quan, unsigned int default_depth_quan, const unsigned int &mode)
	Convert data from the spatial domain to the frequency domain using 2D FFT on GPU. More...
void	cudaPropagation_AngularSpKernel (const int &nBlocks, const int &nThreads, CUstream_st *stream_, cufftDoubleComplex *input_d, cufftDoubleComplex *u_complex, const DMKernelConfig *cuda_config, Real propagation_dist)
	Angular spectrum propagation method for GPU implementation. More...
void	cudaChangeDepthQuanKernel (CUstream_st *stream_, int pnx, int pny, Real *depth_index_gpu, unsigned char *dimg_src_gpu, int dtr, Real d1, Real d2, Real params_num_of_depth, Real params_far_depthmap, Real params_near_depthmap)
	Quantize depth map on the GPU, only when the number of depth quantization is not the default value (i.e. change_depth_quantization == 1 ). More...

Detailed Description

Openholo Point Cloud based CGH generation with CUDA GPGPU.

Author

Hyeong-Hak Ahn

Date

2018/09

Definition in file ophDepthMap_GPU.h.

Macro Definition Documentation

__DEBUG_LOG_GPU_SPEC_

#define __DEBUG_LOG_GPU_SPEC_

Definition at line 58 of file ophDepthMap_GPU.h.

HANDLE_ERROR

#define HANDLE_ERROR

(

err

)

(HandleError( err, __FILE__, __LINE__ ))

Definition at line 72 of file ophDepthMap_GPU.h.

HANDLE_NULL

#define HANDLE_NULL

(

a

)

Value:

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

Definition at line 75 of file ophDepthMap_GPU.h.

Typedef Documentation

DMKernelConfig

typedef struct DMKernelConfig DMKernelConfig

Function Documentation

cudaChangeDepthQuanKernel()

void cudaChangeDepthQuanKernel	(	CUstream_st *	stream_,
		int	pnx,
		int	pny,
		Real *	depth_index_gpu,
		unsigned char *	dimg_src_gpu,
		int	dtr,
		Real	d1,
		Real	d2,
		Real	params_num_of_depth,
		Real	params_far_depthmap,
		Real	params_near_depthmap
	)

Quantize depth map on the GPU, only when the number of depth quantization is not the default value (i.e. change_depth_quantization == 1 ).

Calculate the value of 'depth_index_gpu'.

Parameters

stream	: CUDA Stream
pnx	: the number of column of the input data
pny	: the number of row of the input data
depth_index_gpu	: output variable
dimg_src_gpu	: input depth map data
dtr	: the current working depth level
d1	: the starting physical point of each depth level
d2	: the ending physical point of each depth level
params_num_of_depth	: the number of depth level
params_far_depthmap	: NEAR_OF_DEPTH_MAP at config file
params_near_depthmap	: FAR_OF_DEPTH_MAP at config file

See also

change_depth_quan_GPU

cudaDepthHoloKernel()

void cudaDepthHoloKernel	(	CUstream_st *	stream,
		int	nx,
		int	ny,
		cufftDoubleComplex *	u_o_gpu_,
		unsigned char *	img_src_gpu,
		unsigned char *	dimg_src_gpu,
		Real *	depth_index_gpu,
		int	dtr,
		cuDoubleComplex	rand_phase_val,
		cuDoubleComplex	carrier_phase_delay,
		int	flag_change_depth_quan,
		unsigned int	default_depth_quan,
		const unsigned int &	mode
	)

Convert data from the spatial domain to the frequency domain using 2D FFT on GPU.

call CUDA Kernel - fftShift and CUFFT Library.

Parameters

stream	: CUDA Stream
nx	: the number of column of the input data
ny	: the number of row of the input data
in_field	: input complex data variable
output_field	: output complex data variable
direction	: If direction == -1, forward FFT, if type == 1, inverse FFT.

See also

propagation_AngularSpectrum_GPU, encoding_GPU Find each depth plane of the input image and apply carrier phase delay to it on GPU.

call CUDA Kernel - depth_sources_kernel.

Parameters

stream	: CUDA Stream
nx	: the number of column of the input data
ny	: the number of row of the input data
u_o_gpu_	: output variable
img_src_gpu	: input image data
dimg_src_gpu	: input depth map data
depth_index_gpu	: input quantized depth map data
dtr	: current working depth level
rand_phase_val	: the random phase value
carrier_phase_delay	: the carrier phase delay
flag_change_depth_quan	: if true, change the depth quantization from the default value.
default_depth_quan	: default value of the depth quantization - 256
mode	: float/double precision, use fastmath

See also

calc_Holo_GPU

cudaPropagation_AngularSpKernel()

void cudaPropagation_AngularSpKernel	(	const int &	nBlocks,
		const int &	nThreads,
		CUstream_st *	stream_,
		cufftDoubleComplex *	input_d,
		cufftDoubleComplex *	u_complex,
		const DMKernelConfig *	cuda_config,
		Real	propagation_dist
	)

Angular spectrum propagation method for GPU implementation.

The propagation results of all depth levels are accumulated in the variable 'u_complex_gpu_'.

Parameters

nBlcoks	: the number of blocks
nThreads	: the number of threads per block
stream	: CUDA Stream
nx	: the number of column of the input data
ny	: the number of row of the input data
input_d	: input data
u_complex	: output data
ppx	: pixel pitch of x-axis
ppy	: pixel pitch of y-axis
ssx	: pnx * ppx
ssy	: pny * ppy
lambda	: wavelength
params_k	: 2 * PI / lambda
propagation_dist	: the distance from the object to the hologram plane

See also

propagation_AngularSpectrum_GPU