Chris@1: /********************************************************************
Chris@1:  *                                                                  *
Chris@1:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
Chris@1:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
Chris@1:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
Chris@1:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
Chris@1:  *                                                                  *
Chris@1:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
Chris@1:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
Chris@1:  *                                                                  *
Chris@1:  ********************************************************************
Chris@1: 
Chris@1:  function: single-block PCM analysis mode dispatch
Chris@1:  last mod: $Id: analysis.c 16226 2009-07-08 06:43:49Z xiphmont $
Chris@1: 
Chris@1:  ********************************************************************/
Chris@1: 
Chris@1: #include <stdio.h>
Chris@1: #include <string.h>
Chris@1: #include <math.h>
Chris@1: #include <ogg/ogg.h>
Chris@1: #include "vorbis/codec.h"
Chris@1: #include "codec_internal.h"
Chris@1: #include "registry.h"
Chris@1: #include "scales.h"
Chris@1: #include "os.h"
Chris@1: #include "misc.h"
Chris@1: 
Chris@1: /* decides between modes, dispatches to the appropriate mapping. */
Chris@1: int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
Chris@1:   int ret,i;
Chris@1:   vorbis_block_internal *vbi=vb->internal;
Chris@1: 
Chris@1:   vb->glue_bits=0;
Chris@1:   vb->time_bits=0;
Chris@1:   vb->floor_bits=0;
Chris@1:   vb->res_bits=0;
Chris@1: 
Chris@1:   /* first things first.  Make sure encode is ready */
Chris@1:   for(i=0;i<PACKETBLOBS;i++)
Chris@1:     oggpack_reset(vbi->packetblob[i]);
Chris@1: 
Chris@1:   /* we only have one mapping type (0), and we let the mapping code
Chris@1:      itself figure out what soft mode to use.  This allows easier
Chris@1:      bitrate management */
Chris@1: 
Chris@1:   if((ret=_mapping_P[0]->forward(vb)))
Chris@1:     return(ret);
Chris@1: 
Chris@1:   if(op){
Chris@1:     if(vorbis_bitrate_managed(vb))
Chris@1:       /* The app is using a bitmanaged mode... but not using the
Chris@1:          bitrate management interface. */
Chris@1:       return(OV_EINVAL);
Chris@1: 
Chris@1:     op->packet=oggpack_get_buffer(&vb->opb);
Chris@1:     op->bytes=oggpack_bytes(&vb->opb);
Chris@1:     op->b_o_s=0;
Chris@1:     op->e_o_s=vb->eofflag;
Chris@1:     op->granulepos=vb->granulepos;
Chris@1:     op->packetno=vb->sequence; /* for sake of completeness */
Chris@1:   }
Chris@1:   return(0);
Chris@1: }
Chris@1: 
Chris@1: #ifdef ANALYSIS
Chris@1: int analysis_noisy=1;
Chris@1: 
Chris@1: /* there was no great place to put this.... */
Chris@1: void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
Chris@1:   int j;
Chris@1:   FILE *of;
Chris@1:   char buffer[80];
Chris@1: 
Chris@1:   sprintf(buffer,"%s_%d.m",base,i);
Chris@1:   of=fopen(buffer,"w");
Chris@1: 
Chris@1:   if(!of)perror("failed to open data dump file");
Chris@1: 
Chris@1:   for(j=0;j<n;j++){
Chris@1:     if(bark){
Chris@1:       float b=toBARK((4000.f*j/n)+.25);
Chris@1:       fprintf(of,"%f ",b);
Chris@1:     }else
Chris@1:       if(off!=0)
Chris@1:         fprintf(of,"%f ",(double)(j+off)/8000.);
Chris@1:       else
Chris@1:         fprintf(of,"%f ",(double)j);
Chris@1: 
Chris@1:     if(dB){
Chris@1:       float val;
Chris@1:       if(v[j]==0.)
Chris@1:         val=-140.;
Chris@1:       else
Chris@1:         val=todB(v+j);
Chris@1:       fprintf(of,"%f\n",val);
Chris@1:     }else{
Chris@1:       fprintf(of,"%f\n",v[j]);
Chris@1:     }
Chris@1:   }
Chris@1:   fclose(of);
Chris@1: }
Chris@1: 
Chris@1: void _analysis_output(char *base,int i,float *v,int n,int bark,int dB,
Chris@1:                       ogg_int64_t off){
Chris@1:   if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off);
Chris@1: }
Chris@1: 
Chris@1: #endif
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