86 lines
2.4 KiB
C
Executable File
86 lines
2.4 KiB
C
Executable File
/********************************************************************
|
|
* *
|
|
* 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: vqgen.h 16037 2009-05-26 21:10:58Z xiphmont $
|
|
|
|
********************************************************************/
|
|
|
|
#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
|
|
|
|
|
|
|
|
|
|
|