noise.c
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#include "config.h"
#include "compat.h"
#include "dither.h"
#include "debug.h"
/* Directly include the code for testing, avoiding
build of same object with and without libtool. */
#include "../libmpg123/dither_impl.h"
const char *typenames[] = { "white", "tpdf", "highpass_tpdf" };
enum mpg123_noise_type types[] = { mpg123_white_noise, mpg123_tpdf_noise, mpg123_highpass_tpdf_noise };
int main(int argc, char **argv)
{
size_t i;
size_t count = DITHERSIZE;
float *table;
enum mpg123_noise_type type = mpg123_highpass_tpdf_noise;
fprintf(stderr, "Note: You could give two optional arguments: noise type and table size (number count).\n");
if(argc > 1)
{
const char *typename = argv[1];
for(i=0; i<sizeof(typenames)/sizeof(char*); ++i)
if(strcmp(typename, typenames[i]) == 0)
{
type = types[i];
break;
}
if(i == sizeof(typenames)/sizeof(char*))
{
error("Unknown noise type!");
return -1;
}
}
if(argc > 2)
{
count = (size_t) atol(argv[2]);
}
table = malloc(sizeof(float)*count);
if(table == NULL)
{
error("Cannot allocate memory for noise table!");
return -2;
}
mpg123_noise(table, count, type);
for(i=0; i<count; ++i)
printf("%g\n", table[i]);
free(table);
return 0;
}