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// ----------------------------------------------------------------------------
//
// Copyright (C) 2006-2011 Fons Adriaensen <fons@linuxaudio.org>
//
// 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 3 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.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
#ifndef __DITHER_H
#define __DITHER_H
#include <stdint.h>
class Dither
{
public:
Dither (void);
void reset (void);
void proc_rectangular (const float *srce, int16_t *dest, int step, int nsam);
void proc_triangular (const float *srce, int16_t *dest, int step, int nsam);
void proc_lipschitz (const float *srce, int16_t *dest, int step, int nsam);
private:
enum { SIZE = 64 };
float genrand (void)
{
_ran *= 1103515245;
_ran += 12345;
return _ran / _div;
}
float _err [SIZE + 4];
int _ind;
uint32_t _ran;
static float _div;
};
#endif
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