Chris@1: /********************************************************************
Chris@1:  *                                                                  *
Chris@1:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
Chris@1:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
Chris@1:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
Chris@1:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
Chris@1:  *                                                                  *
Chris@1:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001             *
Chris@1:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
Chris@1:  *                                                                  *
Chris@1:  ********************************************************************
Chris@1: 
Chris@1:  function: build a VQ codebook 
Chris@1:  last mod: $Id: vqgen.h 16037 2009-05-26 21:10:58Z xiphmont $
Chris@1: 
Chris@1:  ********************************************************************/
Chris@1: 
Chris@1: #ifndef _VQGEN_H_
Chris@1: #define _VQGEN_H_
Chris@1: 
Chris@1: typedef struct vqgen{
Chris@1:   int seeded;
Chris@1:   int sorted;
Chris@1: 
Chris@1:   int it;
Chris@1:   int elements;
Chris@1: 
Chris@1:   int aux;
Chris@1:   float mindist;
Chris@1:   int centroid;
Chris@1: 
Chris@1:   /* point cache */
Chris@1:   float *pointlist; 
Chris@1:   long   points;
Chris@1:   long   allocated;
Chris@1: 
Chris@1:   /* entries */
Chris@1:   float *entrylist;
Chris@1:   long   *assigned;
Chris@1:   float *bias;
Chris@1:   long   entries;
Chris@1:   float *max;
Chris@1:   
Chris@1:   float  (*metric_func) (struct vqgen *v,float *entry,float *point);
Chris@1:   float *(*weight_func) (struct vqgen *v,float *point);
Chris@1: 
Chris@1:   FILE *asciipoints;
Chris@1: } vqgen;
Chris@1: 
Chris@1: typedef struct {
Chris@1:   long   min;       /* packed 24 bit float */       
Chris@1:   long   delta;     /* packed 24 bit float */       
Chris@1:   int    quant;     /* 0 < quant <= 16 */
Chris@1:   int    sequencep; /* bitflag */
Chris@1: } quant_meta;
Chris@1: 
Chris@1: static inline float *_point(vqgen *v,long ptr){
Chris@1:   return v->pointlist+((v->elements+v->aux)*ptr);
Chris@1: }
Chris@1: 
Chris@1: static inline float *_aux(vqgen *v,long ptr){
Chris@1:   return _point(v,ptr)+v->aux;
Chris@1: }
Chris@1: 
Chris@1: static inline float *_now(vqgen *v,long ptr){
Chris@1:   return v->entrylist+(v->elements*ptr);
Chris@1: }
Chris@1: 
Chris@1: extern void vqgen_init(vqgen *v,
Chris@1:                        int elements,int aux,int entries,float mindist,
Chris@1:                        float  (*metric)(vqgen *,float *, float *),
Chris@1:                        float *(*weight)(vqgen *,float *),int centroid);
Chris@1: extern void vqgen_addpoint(vqgen *v, float *p,float *aux);
Chris@1: 
Chris@1: extern float vqgen_iterate(vqgen *v,int biasp);
Chris@1: extern void vqgen_unquantize(vqgen *v,quant_meta *q);
Chris@1: extern void vqgen_quantize(vqgen *v,quant_meta *q);
Chris@1: extern void vqgen_cellmetric(vqgen *v);
Chris@1: 
Chris@1: #endif
Chris@1: 
Chris@1: 
Chris@1: 
Chris@1: 
Chris@1: