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  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 1994-2007             *
  9.  * by the Xiph.Org Foundation https://xiph.org/                     *
  10.  *                                                                  *
  11.  ********************************************************************
  12.  
  13.  function: single-block PCM analysis mode dispatch
  14.  
  15.  ********************************************************************/
  16.  
  17. #include <stdio.h>
  18. #include <string.h>
  19. #include <math.h>
  20. #include <ogg/ogg.h>
  21. #include "vorbis/codec.h"
  22. #include "codec_internal.h"
  23. #include "registry.h"
  24. #include "scales.h"
  25. #include "os.h"
  26. #include "misc.h"
  27.  
  28. /* decides between modes, dispatches to the appropriate mapping. */
  29. int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
  30.   int ret,i;
  31.   vorbis_block_internal *vbi=vb->internal;
  32.  
  33.   vb->glue_bits=0;
  34.   vb->time_bits=0;
  35.   vb->floor_bits=0;
  36.   vb->res_bits=0;
  37.  
  38.   /* first things first.  Make sure encode is ready */
  39.   for(i=0;i<PACKETBLOBS;i++)
  40.     oggpack_reset(vbi->packetblob[i]);
  41.  
  42.   /* we only have one mapping type (0), and we let the mapping code
  43.      itself figure out what soft mode to use.  This allows easier
  44.      bitrate management */
  45.  
  46.   if((ret=_mapping_P[0]->forward(vb)))
  47.     return(ret);
  48.  
  49.   if(op){
  50.     if(vorbis_bitrate_managed(vb))
  51.       /* The app is using a bitmanaged mode... but not using the
  52.          bitrate management interface. */
  53.       return(OV_EINVAL);
  54.  
  55.     op->packet=oggpack_get_buffer(&vb->opb);
  56.     op->bytes=oggpack_bytes(&vb->opb);
  57.     op->b_o_s=0;
  58.     op->e_o_s=vb->eofflag;
  59.     op->granulepos=vb->granulepos;
  60.     op->packetno=vb->sequence; /* for sake of completeness */
  61.   }
  62.   return(0);
  63. }
  64.  
  65. #ifdef ANALYSIS
  66. int analysis_noisy=1;
  67.  
  68. /* there was no great place to put this.... */
  69. void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
  70.   int j;
  71.   FILE *of;
  72.   char buffer[80];
  73.  
  74.   sprintf(buffer,"%s_%d.m",base,i);
  75.   of=fopen(buffer,"w");
  76.  
  77.   if(!of)perror("failed to open data dump file");
  78.  
  79.   for(j=0;j<n;j++){
  80.     if(bark){
  81.       float b=toBARK((4000.f*j/n)+.25);
  82.       fprintf(of,"%f ",b);
  83.     }else
  84.       if(off!=0)
  85.         fprintf(of,"%f ",(double)(j+off)/8000.);
  86.       else
  87.         fprintf(of,"%f ",(double)j);
  88.  
  89.     if(dB){
  90.       float val;
  91.       if(v[j]==0.)
  92.         val=-140.;
  93.       else
  94.         val=todB(v+j);
  95.       fprintf(of,"%f\n",val);
  96.     }else{
  97.       fprintf(of,"%f\n",v[j]);
  98.     }
  99.   }
  100.   fclose(of);
  101. }
  102.  
  103. void _analysis_output(char *base,int i,float *v,int n,int bark,int dB,
  104.                       ogg_int64_t off){
  105.   if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off);
  106. }
  107.  
  108. #endif
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