release/src/router/libvorbis/vq/cascade.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: function call to do simple data cascading
  14  last mod: $Id: cascade.c 16037 2009-05-26 21:10:58Z xiphmont $
  15
  16  ********************************************************************/
  17
  18 /* this one outputs residue to stdout. */
  19
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <math.h>
  23 #include "bookutil.h"
  24
  25 /* set up metrics */
  26
  27 float count=0.f;
  28
  29
  30 void process_preprocess(codebook **bs,char *basename){
  31 }
  32
  33 void process_postprocess(codebook **b,char *basename){
  34   fprintf(stderr,"Done.                      \n");
  35 }
  36
  37 float process_one(codebook *b,float *a,int dim,int step,int addmul,
  38                    float base){
  39   int j;
  40
  41   if(b->c->q_sequencep){
  42     float temp;
  43     for(j=0;j<dim;j++){
  44       temp=a[j*step];
  45       a[j*step]-=base;
  46     }
  47     base=temp;
  48   }
  49
  50   vorbis_book_besterror(b,a,step,addmul);
  51
  52   return base;
  53 }
  54
  55 void process_vector(codebook **bs,int *addmul,int inter,float *a,int n){
  56   int i,bi=0;
  57   int booknum=0;
  58
  59   while(*bs){
  60     float base=0.f;
  61     codebook *b=*bs;
  62     int dim=b->dim;
  63
  64     if(inter){
  65       for(i=0;i<n/dim;i++)
  66         base=process_one(b,a+i,dim,n/dim,addmul[bi],base);
  67     }else{
  68       for(i=0;i<=n-dim;i+=dim)
  69         base=process_one(b,a+i,dim,1,addmul[bi],base);
  70     }
  71
  72     bs++;
  73     booknum++;
  74     bi++;
  75   }
  76
  77   for(i=0;i<n;i++)
  78     fprintf(stdout,"%f, ",a[i]);
  79   fprintf(stdout,"\n");
  80
  81   if((long)(count++)%100)spinnit("working.... lines: ",count);
  82 }
  83
  84 void process_usage(void){
  85   fprintf(stderr,
  86           "usage: vqcascade [-i] +|*<codebook>.vqh [ +|*<codebook.vqh> ]... \n"
  87           "                 datafile.vqd [datafile.vqd]...\n\n"
  88           "       data can be taken on stdin.  residual error data sent to\n"
  89           "       stdout.\n\n");
  90
  91 }