FFT.h

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/*
 * FFT.h
 *
 *  Created on: May 31, 2016
 *      Author: Torsten
 */

#ifndef FFT_H_
#define FFT_H_

#include "AudioPlayer.h"

#define FFT_SIZE            256                     //256, 512 or 1024, nothing else, just 256 supported
#define FFT_SAMPLES         (2*FFT_SIZE)

#define FFT_Y_BORDER        0
#define FFT_Y_BORDER_TOP    70
#define FFT_X_WIDTH         20
#define FFT_X_W_RECT        (FFT_X_WIDTH-3)
#define FFT_X_START         20

#define X_STEPS             7                       //for line and point graph

#define FFT_BIN_SKIP        0                       //0..10 : how many low freq. bins to skip for higher resolution on higher freq.
#define FFT_DISP_TYPE       2                       //0..2 : 0 = bars, 1 = points, 2 = lines - 1: points, it the fastest way

#define COLOR_INACTIVE      LCD_COLOR_BLACK
#define COLOR_LEFT          LCD_COLOR_YELLOW
#define COLOR_RIGHT         LCD_COLOR_GREEN

extern int32_t  FFT_Init(void);
extern int32_t  FFT_Filter(int ch);
extern int32_t  FFT_Ready(float32_t **result, int *numResults);
extern void     FFT_DisplayGraph(int ch);

#endif /* FFT_H_ */