1 /********************************************************************
3 * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
5 * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
6 * PLEASE READ THESE TERMS DISTRIBUTING. *
8 * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
9 * by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
10 * http://www.xiph.org/ *
12 ********************************************************************
14 function: build a VQ codebook
15 last mod: $Id: vqgen.h,v 1.15 2000/10/12 03:13:02 xiphmont Exp $
17 ********************************************************************/
45 float (*metric_func) (struct vqgen *v,float *entry,float *point);
46 float *(*weight_func) (struct vqgen *v,float *point);
52 long min; /* packed 24 bit float */
53 long delta; /* packed 24 bit float */
54 int quant; /* 0 < quant <= 16 */
55 int sequencep; /* bitflag */
58 static inline float *_point(vqgen *v,long ptr){
59 return v->pointlist+((v->elements+v->aux)*ptr);
62 static inline float *_aux(vqgen *v,long ptr){
63 return _point(v,ptr)+v->aux;
66 static inline float *_now(vqgen *v,long ptr){
67 return v->entrylist+(v->elements*ptr);
70 extern void vqgen_init(vqgen *v,
71 int elements,int aux,int entries,float mindist,
72 float (*metric)(vqgen *,float *, float *),
73 float *(*weight)(vqgen *,float *),int centroid);
74 extern void vqgen_addpoint(vqgen *v, float *p,float *aux);
76 extern float vqgen_iterate(vqgen *v,int biasp);
77 extern void vqgen_unquantize(vqgen *v,quant_meta *q);
78 extern void vqgen_quantize(vqgen *v,quant_meta *q);
79 extern void vqgen_cellmetric(vqgen *v);