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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 http://www.xiph.org/                  *
     10  *                                                                  *
     11  ********************************************************************
     12 
     13  function: single-block PCM analysis mode dispatch
     14  last mod: $Id: analysis.c 16226 2009-07-08 06:43:49Z xiphmont $
     15 
     16  ********************************************************************/
     17 
     18 #include <stdio.h>
     19 #include <string.h>
     20 #include <math.h>
     21 #include <ogg/ogg.h>
     22 #include "vorbis/codec.h"
     23 #include "codec_internal.h"
     24 #include "registry.h"
     25 #include "scales.h"
     26 #include "os.h"
     27 #include "misc.h"
     28 
     29 /* decides between modes, dispatches to the appropriate mapping. */
     30 int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
     31   int ret,i;
     32   vorbis_block_internal *vbi=vb->internal;
     33 
     34   vb->glue_bits=0;
     35   vb->time_bits=0;
     36   vb->floor_bits=0;
     37   vb->res_bits=0;
     38 
     39   /* first things first.  Make sure encode is ready */
     40   for(i=0;i<PACKETBLOBS;i++)
     41     oggpack_reset(vbi->packetblob[i]);
     42 
     43   /* we only have one mapping type (0), and we let the mapping code
     44      itself figure out what soft mode to use.  This allows easier
     45      bitrate management */
     46 
     47   if((ret=_mapping_P[0]->forward(vb)))
     48     return(ret);
     49 
     50   if(op){
     51     if(vorbis_bitrate_managed(vb))
     52       /* The app is using a bitmanaged mode... but not using the
     53          bitrate management interface. */
     54       return(OV_EINVAL);
     55 
     56     op->packet=oggpack_get_buffer(&vb->opb);
     57     op->bytes=oggpack_bytes(&vb->opb);
     58     op->b_o_s=0;
     59     op->e_o_s=vb->eofflag;
     60     op->granulepos=vb->granulepos;
     61     op->packetno=vb->sequence; /* for sake of completeness */
     62   }
     63   return(0);
     64 }
     65 
     66 #ifdef ANALYSIS
     67 int analysis_noisy=1;
     68 
     69 /* there was no great place to put this.... */
     70 void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
     71   int j;
     72   FILE *of;
     73   char buffer[80];
     74 
     75   sprintf(buffer,"%s_%d.m",base,i);
     76   of=fopen(buffer,"w");
     77 
     78   if(!of)perror("failed to open data dump file");
     79 
     80   for(j=0;j<n;j++){
     81     if(bark){
     82       float b=toBARK((4000.f*j/n)+.25);
     83       fprintf(of,"%f ",b);
     84     }else
     85       if(off!=0)
     86         fprintf(of,"%f ",(double)(j+off)/8000.);
     87       else
     88         fprintf(of,"%f ",(double)j);
     89 
     90     if(dB){
     91       float val;
     92       if(v[j]==0.)
     93         val=-140.;
     94       else
     95         val=todB(v+j);
     96       fprintf(of,"%f\n",val);
     97     }else{
     98       fprintf(of,"%f\n",v[j]);
     99     }
    100   }
    101   fclose(of);
    102 }
    103 
    104 void _analysis_output(char *base,int i,float *v,int n,int bark,int dB,
    105                       ogg_int64_t off){
    106   if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off);
    107 }
    108 
    109 #endif
    110 
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