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#include "utils.h"
#include <unistd.h>
#include <stdint.h>
#include <math.h>
/* Taken from sox */
const char* level(int channel, int peak)
{
static char const * const text[][2] = {
/* White: 2dB steps */
{"", ""}, {"-", "-"}, {"=", "="}, {"-=", "=-"},
{"==", "=="}, {"-==", "==-"}, {"===", "==="}, {"-===", "===-"},
{"====", "===="}, {"-====", "====-"}, {"=====", "====="},
{"-=====", "=====-"}, {"======", "======"},
/* Red: 1dB steps */
{"!=====", "=====!"},
};
int const red = 1, white = NUMOF(text) - red;
double linear = ((double)peak) / INT16_MAX;
int vu_dB = linear ? floor(2 * white + red + linear_to_dB(linear)) : 0;
int index = vu_dB < 2 * white ?
MAX(vu_dB / 2, 0) :
MIN(vu_dB - white, red + white - 1);
return text[index][channel];
}
size_t strlen_utf8(const char *s) {
size_t result = 0;
// ignore continuation bytes - only count single/leading bytes
while (*s)
if ((*s++ & 0xC0) != 0x80)
result++;
return result;
}
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