/*******************************************************************************
Vendor: Xilinx 
Associated Filename: hamming_window.h
Purpose: Vivado HLS tutorial example 
Revision History: March 1, 2013 - initial release
                                                
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#ifndef HAMMING_WINDOW_H_
#define HAMMING_WINDOW_H_

#include <cmath>
#include <fstream>
#include <iostream>
#include <iomanip>
#include <cstdlib>
using namespace std;

#ifndef M_PI
#define M_PI           3.14159265358979323846
#endif

// If WINDOW_LEN is not defined by the user, define a default value
#ifndef WINDOW_LEN
#define WINDOW_LEN 256
#endif
// If WIN_COEFF_FRACBITS not defined by user, set a default value
#ifndef WIN_COEFF_FRACBITS
#define WIN_COEFF_FRACBITS (14)
#endif
// Set the scale factor for the window coefficients
#define WIN_COEFF_SCALE ((float)(1 << WIN_COEFF_FRACBITS))

// This function applies an Hamming window function to the 'indata' buffer,
// returning the windowed data in 'outdata'.  The coefficients are 16-bit
// scaled integer, which may be interpreted as a signed fixed point format,
// with WIN_COEFF_FRACBITS bits after the binary point.

//typedef int16_t		in_data_t;
//typedef int32_t		out_data_t;
#include "ap_int.h"
typedef ap_int<16>		in_data_t;
typedef ap_int<32>		out_data_t;

void hamming_window(out_data_t outdata[], in_data_t indata[]);

#endif // HAMMING_WINDOW_H_ not defined
