mirror of
https://github.com/cookiengineer/audacity
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62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/********************************************************************
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* *
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* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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* *
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* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
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* by the Xiph.Org Foundation http://www.xiph.org/ *
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* *
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********************************************************************
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function: generic euclidian distance metric for VQ codebooks
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last mod: $Id: genericdata.c,v 1.4 2008-02-02 15:54:08 richardash1981 Exp $
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********************************************************************/
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#include <stdlib.h>
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#include <math.h>
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#include <stdio.h>
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#include "vqgen.h"
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#include "vqext.h"
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char *vqext_booktype="GENERICdata";
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int vqext_aux=0;
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quant_meta q={0,0,0,0}; /* non sequence data; each scalar
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independent */
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void vqext_quantize(vqgen *v,quant_meta *q){
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vqgen_quantize(v,q);
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}
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float *vqext_weight(vqgen *v,float *p){
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/*noop*/
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return(p);
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}
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/* candidate,actual */
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float vqext_metric(vqgen *v,float *e, float *p){
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int i;
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float acc=0.f;
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for(i=0;i<v->elements;i++){
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float val=p[i]-e[i];
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acc+=val*val;
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}
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return sqrt(acc/v->elements);
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}
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void vqext_addpoint_adj(vqgen *v,float *b,int start,int dim,int cols,int num){
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vqgen_addpoint(v,b+start,NULL);
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}
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void vqext_preprocess(vqgen *v){
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/* noop */
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}
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