
//
// File:       clFFT.h
//
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#ifndef __CLFFT_H
#define __CLFFT_H

#ifdef __cplusplus
extern "C" {
#endif

#include <CL\opencl.h>
#include <stdio.h>

// XForm type
enum clFFT_Direction
{
	clFFT_Forward	= 	-1,
	clFFT_Inverse	= 	 1
	
};

// XForm dimension
enum clFFT_Dimension
{
	clFFT_1D	= 0,
	clFFT_2D	= 1,
	clFFT_3D	= 3
	
};

// XForm Data type
enum clFFT_DataFormat
{
	clFFT_SplitComplexFormat       = 0,
	clFFT_InterleavedComplexFormat = 1
};

struct clFFT_Dim3
{
	unsigned int x;
	unsigned int y;
	unsigned int z;

	clFFT_Dim3()
	{

	}

	clFFT_Dim3(unsigned int nx, unsigned int ny, unsigned int nz)
	{
		x = nx;
		y = ny;
		z = nz;
	}
};	
	
struct clFFT_SplitComplex
{
	float *real;
	float *imag;

	clFFT_SplitComplex() 
	{

	}
	clFFT_SplitComplex(float* pr, float* pi)
	{
		real = pr;
		imag = pi;
	}
} ;

struct clFFT_Complex
{
	float real;
	float imag;
};


struct clFFT_SplitComplexDouble
{
	double *real;
	double *imag;
	clFFT_SplitComplexDouble()
	{

	}
	clFFT_SplitComplexDouble(double* pr, double* pi)
	{
		real = pr;
		imag = pi;
	}
};

typedef void* clFFT_Plan;	

clFFT_Plan clFFT_CreatePlan( cl_context context, clFFT_Dim3 n, clFFT_Dimension dim, clFFT_DataFormat dataFormat, cl_int *error_code );

void clFFT_DestroyPlan( clFFT_Plan plan );

cl_int clFFT_ExecuteInterleaved( cl_command_queue queue, clFFT_Plan plan, cl_int batchSize, clFFT_Direction dir, 
								 cl_mem data_in, cl_mem data_out,
								 cl_int num_events, cl_event *event_list, cl_event *event );

cl_int clFFT_ExecutePlannar( cl_command_queue queue, clFFT_Plan plan, cl_int batchSize, clFFT_Direction dir, 
							 cl_mem data_in_real, cl_mem data_in_imag, cl_mem data_out_real, cl_mem data_out_imag,
							 cl_int num_events, cl_event *event_list, cl_event *event );

cl_int clFFT_1DTwistInterleaved(clFFT_Plan Plan, cl_command_queue queue, cl_mem array, 
						        size_t numRows, size_t numCols, size_t startRow, size_t rowsToProcess, clFFT_Direction dir);
	

cl_int clFFT_1DTwistPlannar(clFFT_Plan Plan, cl_command_queue queue, cl_mem array_real, cl_mem array_imag, 
					        size_t numRows, size_t numCols, size_t startRow, size_t rowsToProcess, clFFT_Direction dir);
	
void clFFT_DumpPlan( clFFT_Plan plan, FILE *file);	

#ifdef __cplusplus
}
#endif

#endif 
