cannam@86: /********************************************************************
cannam@86:  *                                                                  *
cannam@86:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
cannam@86:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
cannam@86:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
cannam@86:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
cannam@86:  *                                                                  *
cannam@86:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001             *
cannam@86:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
cannam@86:  *                                                                  *
cannam@86:  ********************************************************************
cannam@86: 
cannam@86:  function: build a VQ codebook 
cannam@86:  last mod: $Id: vqgen.h 16037 2009-05-26 21:10:58Z xiphmont $
cannam@86: 
cannam@86:  ********************************************************************/
cannam@86: 
cannam@86: #ifndef _VQGEN_H_
cannam@86: #define _VQGEN_H_
cannam@86: 
cannam@86: typedef struct vqgen{
cannam@86:   int seeded;
cannam@86:   int sorted;
cannam@86: 
cannam@86:   int it;
cannam@86:   int elements;
cannam@86: 
cannam@86:   int aux;
cannam@86:   float mindist;
cannam@86:   int centroid;
cannam@86: 
cannam@86:   /* point cache */
cannam@86:   float *pointlist; 
cannam@86:   long   points;
cannam@86:   long   allocated;
cannam@86: 
cannam@86:   /* entries */
cannam@86:   float *entrylist;
cannam@86:   long   *assigned;
cannam@86:   float *bias;
cannam@86:   long   entries;
cannam@86:   float *max;
cannam@86:   
cannam@86:   float  (*metric_func) (struct vqgen *v,float *entry,float *point);
cannam@86:   float *(*weight_func) (struct vqgen *v,float *point);
cannam@86: 
cannam@86:   FILE *asciipoints;
cannam@86: } vqgen;
cannam@86: 
cannam@86: typedef struct {
cannam@86:   long   min;       /* packed 24 bit float */       
cannam@86:   long   delta;     /* packed 24 bit float */       
cannam@86:   int    quant;     /* 0 < quant <= 16 */
cannam@86:   int    sequencep; /* bitflag */
cannam@86: } quant_meta;
cannam@86: 
cannam@86: static inline float *_point(vqgen *v,long ptr){
cannam@86:   return v->pointlist+((v->elements+v->aux)*ptr);
cannam@86: }
cannam@86: 
cannam@86: static inline float *_aux(vqgen *v,long ptr){
cannam@86:   return _point(v,ptr)+v->aux;
cannam@86: }
cannam@86: 
cannam@86: static inline float *_now(vqgen *v,long ptr){
cannam@86:   return v->entrylist+(v->elements*ptr);
cannam@86: }
cannam@86: 
cannam@86: extern void vqgen_init(vqgen *v,
cannam@86:                        int elements,int aux,int entries,float mindist,
cannam@86:                        float  (*metric)(vqgen *,float *, float *),
cannam@86:                        float *(*weight)(vqgen *,float *),int centroid);
cannam@86: extern void vqgen_addpoint(vqgen *v, float *p,float *aux);
cannam@86: 
cannam@86: extern float vqgen_iterate(vqgen *v,int biasp);
cannam@86: extern void vqgen_unquantize(vqgen *v,quant_meta *q);
cannam@86: extern void vqgen_quantize(vqgen *v,quant_meta *q);
cannam@86: extern void vqgen_cellmetric(vqgen *v);
cannam@86: 
cannam@86: #endif
cannam@86: 
cannam@86: 
cannam@86: 
cannam@86: 
cannam@86: