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/* This program is licensed under the GNU Library General Public License, version 2,
* a copy of which is included with this program (with filename LICENSE.LGPL).
*
* (c) 2002 John Edwards
*
* rand_t header.
*
* last modified: $ID:$
*/
#include "common.h"
#ifndef __RAND_T_H
#define __RAND_T_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef FIXED_POINT
typedef struct {
const float32_t* FilterCoeff;
uint64_t Mask;
double Add;
float32_t Dither;
float32_t ErrorHistory [2] [16]; // max. 2 channels, 16th order Noise shaping
float32_t DitherHistory [2] [16];
int32_t LastRandomNumber [2];
} dither_t;
extern dither_t Dither;
extern double doubletmp;
//static const uint8_t Parity [256];
uint32_t random_int ( void );
extern double scalar16 ( const float32_t* x, const float32_t* y );
extern double Random_Equi ( double mult );
extern double Random_Triangular ( double mult );
void Init_Dither ( uint8_t bits, uint8_t shapingtype );
#endif
#ifdef __cplusplus
}
#endif
#endif
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