/*
* Copyright (C) 2004 Steve Harris
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* $Id: ex1.c $
*/
#include <stdio.h>
#include <stdint.h>
#include <math.h>
#define SIZE 256
#include "gdither.h"
int main(int argc, char *argv[])
{
GDither ds;
float in[SIZE]; /* test input data */
double ind[SIZE]; /* test input data */
int32_t out32[SIZE]; /* test output data: 1 chan 32bit */
int16_t out16[SIZE][4]; /* test output data: 4 chan 16bit */
float outf[SIZE]; /* test output data: 1 chan float */
int i;
/* --- Example 1a --- */
/* create an arbitrary sinewave for testing */
for (i=0; i<SIZE; i++) {
ind[i] = sin(i);
in[i] = ind[i];
}
/* create a dither object that produces 32bit ints, triangular dithered to
* 24 bits */
ds = gdither_new(GDitherTri, 1, GDither32bit, 24);
/* run the dother algorithm over the input data */
gdither_runf(ds, 0, SIZE, in, out32);
/* free the dither object */
gdither_free(ds);
/* --- Example 1b --- */
/* create a dither object to produce rounded (undithered) 4 channel
* interleaved 16bit output */
ds = gdither_new(GDitherNone, 4, GDither16bit, 16);
gdither_runf(ds, 0, SIZE, in, out16);
gdither_runf(ds, 1, SIZE, in, out16);
gdither_runf(ds, 2, SIZE, in, out16);
gdither_runf(ds, 3, SIZE, in, out16);
gdither_free(ds);
/* --- Example 1c --- */
/* create a dither object to produce float output rectangular dithered to
* 24 bits from double data */
ds = gdither_new(GDitherRect, 4, GDitherFloat, 24);
gdither_run(ds, 0, SIZE, ind, outf);
gdither_free(ds);
return 0;
}
/* vi:set ts=8 sts=4 sw=4: */