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

#ifdef __cplusplus
extern "C" {
#endif

#define CL_TARGET_OPENCL_VERSION 120 // to remove compilation warnings
#ifdef __APPLE__
#	include <OpenCL/cl.h>
#else
#	include <CL/cl.h>
#endif

#include <stdio.h>

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

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

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

typedef struct
{
	unsigned int x;
	unsigned int y;
	unsigned int z;
}clFFT_Dim3;	
	
typedef struct
{
	double *real;
	double *imag;
} clFFT_SplitComplex;

typedef struct
{
	double real;
	double imag;
}clFFT_Complex;

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 
