renamed internal headers to avoid conflicts with system header files

modules/objdetect/src/_lsvm_fft.h

@@ -0,0 +1,79 @@
+#ifndef _LSVM_FFT_H
+#define _LSVM_FFT_H
+
+#include "_lsvm_types.h"
+#include "_lsvm_error.h"
+#include <math.h>
+
+/*
+// 1-dimensional FFT
+//
+// API
+// int fft(float *x_in, float *x_out, int n, int shift); 
+// INPUT
+// x_in              - input signal
+// n                 - number of elements for searching Fourier image
+// shift             - shift between input elements
+// OUTPUT
+// x_out             - output signal (contains 2n elements in order 
+                       Re(x_in[0]), Im(x_in[0]), Re(x_in[1]), Im(x_in[1]) and etc.)
+// RESULT
+// Error status
+*/
+int fft(float *x_in, float *x_out, int n, int shift);
+
+/*
+// Inverse 1-dimensional FFT
+//
+// API
+// int fftInverse(float *x_in, float *x_out, int n, int shift);
+// INPUT
+// x_in              - Fourier image of 1d input signal(contains 2n elements 
+                       in order Re(x_in[0]), Im(x_in[0]), 
+                       Re(x_in[1]), Im(x_in[1]) and etc.)
+// n                 - number of elements for searching counter FFT image
+// shift             - shift between input elements
+// OUTPUT
+// x_in              - input signal (contains n elements)
+// RESULT
+// Error status
+*/
+int fftInverse(float *x_in, float *x_out, int n, int shift);
+
+/*
+// 2-dimensional FFT
+//
+// API
+// int fft2d(float *x_in, float *x_out, int numRows, int numColls);
+// INPUT
+// x_in              - input signal (matrix, launched by rows)
+// numRows           - number of rows
+// numColls          - number of collumns
+// OUTPUT
+// x_out             - output signal (contains (2 * numRows * numColls) elements
+                       in order Re(x_in[0][0]), Im(x_in[0][0]), 
+                       Re(x_in[0][1]), Im(x_in[0][1]) and etc.)
+// RESULT
+// Error status
+*/
+int fft2d(float *x_in, float *x_out, int numRows, int numColls);
+
+/*
+// Inverse 2-dimensional FFT
+//
+// API
+// int fftInverse2d(float *x_in, float *x_out, int numRows, int numColls);
+// INPUT
+// x_in              - Fourier image of matrix (contains (2 * numRows * numColls) 
+                       elements in order Re(x_in[0][0]), Im(x_in[0][0]), 
+                       Re(x_in[0][1]), Im(x_in[0][1]) and etc.)
+// numRows           - number of rows
+// numColls          - number of collumns
+// OUTPUT
+// x_out             - initial signal (matrix, launched by rows)
+// RESULT
+// Error status
+*/
+int fftInverse2d(float *x_in, float *x_out, int numRows, int numColls);
+
+#endif