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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: build a VQ codebook
last mod: $Id$
********************************************************************/
#ifndef _VQGEN_H_
#define _VQGEN_H_
typedef struct vqgen{
int seeded;
int sorted;
int it;
int elements;
int aux;
float mindist;
int centroid;
/* point cache */
float *pointlist;
long points;
long allocated;
/* entries */
float *entrylist;
long *assigned;
float *bias;
long entries;
float *max;
float (*metric_func) (struct vqgen *v,float *entry,float *point);
float *(*weight_func) (struct vqgen *v,float *point);
FILE *asciipoints;
} vqgen;
typedef struct {
long min; /* packed 24 bit float */
long delta; /* packed 24 bit float */
int quant; /* 0 < quant <= 16 */
int sequencep; /* bitflag */
} quant_meta;
static inline float *_point(vqgen *v,long ptr){
return v->pointlist+((v->elements+v->aux)*ptr);
}
static inline float *_aux(vqgen *v,long ptr){
return _point(v,ptr)+v->aux;
}
static inline float *_now(vqgen *v,long ptr){
return v->entrylist+(v->elements*ptr);
}
extern void vqgen_init(vqgen *v,
int elements,int aux,int entries,float mindist,
float (*metric)(vqgen *,float *, float *),
float *(*weight)(vqgen *,float *),int centroid);
extern void vqgen_addpoint(vqgen *v, float *p,float *aux);
extern float vqgen_iterate(vqgen *v,int biasp);
extern void vqgen_unquantize(vqgen *v,quant_meta *q);
extern void vqgen_quantize(vqgen *v,quant_meta *q);
extern void vqgen_cellmetric(vqgen *v);
#endif