VUMeter.h

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/*
 * VUMeter.h
 *
 *  Created on: May 30, 2016
 *      Author: Torsten
 */

#ifndef VUMETER_H_
#define VUMETER_H_

#include "main.h"

#define NUM_CHANNELS    2
#define MAX_VALUE       0x7FFF              // for int16 (16bit samples)
#define SEGMENTS        25
#define X_START         10
#define Y_START         13
#define X_WIDTH         30
#define Y_WIDTH         20
#define XY_GAP           1

#define PEAKHOLD        2000                // Time of peak hold in ms
#define LEVELMOVE        100                // Time to lower level in ms, if too slow (in relation to buffer size) - it looks strange on highest segment

typedef struct                              // VU Meter Parameters
{
    uint16_t channel;                       // defines active channel for processing
    int16_t  vuInput[NUM_CHANNELS];         // value for VU-Input (0 = left, 1 = right)
    int16_t  vuPeak[NUM_CHANNELS];          // Peak value for VU-Meter peak hold
    uint32_t vuTick[NUM_CHANNELS];          // Time constant for release VU-Input
    uint32_t vuTickPeak[NUM_CHANNELS];      // Time constant for release VU-Input Peak
} t_VUparams;

extern void VUMETER_Analyse(void);
extern void VUMETER_Input(int channel);
extern void VUMETER_Display(int channel);

#endif /* VUMETER_H_ */