cannam@86: /********************************************************************
cannam@86:  *                                                                  *
cannam@86:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
cannam@86:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
cannam@86:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
cannam@86:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
cannam@86:  *                                                                  *
cannam@86:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
cannam@86:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
cannam@86:  *                                                                  *
cannam@86:  ********************************************************************
cannam@86: 
cannam@86:  function: single-block PCM analysis mode dispatch
cannam@86:  last mod: $Id: analysis.c 16226 2009-07-08 06:43:49Z xiphmont $
cannam@86: 
cannam@86:  ********************************************************************/
cannam@86: 
cannam@86: #include <stdio.h>
cannam@86: #include <string.h>
cannam@86: #include <math.h>
cannam@86: #include <ogg/ogg.h>
cannam@86: #include "vorbis/codec.h"
cannam@86: #include "codec_internal.h"
cannam@86: #include "registry.h"
cannam@86: #include "scales.h"
cannam@86: #include "os.h"
cannam@86: #include "misc.h"
cannam@86: 
cannam@86: /* decides between modes, dispatches to the appropriate mapping. */
cannam@86: int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
cannam@86:   int ret,i;
cannam@86:   vorbis_block_internal *vbi=vb->internal;
cannam@86: 
cannam@86:   vb->glue_bits=0;
cannam@86:   vb->time_bits=0;
cannam@86:   vb->floor_bits=0;
cannam@86:   vb->res_bits=0;
cannam@86: 
cannam@86:   /* first things first.  Make sure encode is ready */
cannam@86:   for(i=0;i<PACKETBLOBS;i++)
cannam@86:     oggpack_reset(vbi->packetblob[i]);
cannam@86: 
cannam@86:   /* we only have one mapping type (0), and we let the mapping code
cannam@86:      itself figure out what soft mode to use.  This allows easier
cannam@86:      bitrate management */
cannam@86: 
cannam@86:   if((ret=_mapping_P[0]->forward(vb)))
cannam@86:     return(ret);
cannam@86: 
cannam@86:   if(op){
cannam@86:     if(vorbis_bitrate_managed(vb))
cannam@86:       /* The app is using a bitmanaged mode... but not using the
cannam@86:          bitrate management interface. */
cannam@86:       return(OV_EINVAL);
cannam@86: 
cannam@86:     op->packet=oggpack_get_buffer(&vb->opb);
cannam@86:     op->bytes=oggpack_bytes(&vb->opb);
cannam@86:     op->b_o_s=0;
cannam@86:     op->e_o_s=vb->eofflag;
cannam@86:     op->granulepos=vb->granulepos;
cannam@86:     op->packetno=vb->sequence; /* for sake of completeness */
cannam@86:   }
cannam@86:   return(0);
cannam@86: }
cannam@86: 
cannam@86: #ifdef ANALYSIS
cannam@86: int analysis_noisy=1;
cannam@86: 
cannam@86: /* there was no great place to put this.... */
cannam@86: void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
cannam@86:   int j;
cannam@86:   FILE *of;
cannam@86:   char buffer[80];
cannam@86: 
cannam@86:   sprintf(buffer,"%s_%d.m",base,i);
cannam@86:   of=fopen(buffer,"w");
cannam@86: 
cannam@86:   if(!of)perror("failed to open data dump file");
cannam@86: 
cannam@86:   for(j=0;j<n;j++){
cannam@86:     if(bark){
cannam@86:       float b=toBARK((4000.f*j/n)+.25);
cannam@86:       fprintf(of,"%f ",b);
cannam@86:     }else
cannam@86:       if(off!=0)
cannam@86:         fprintf(of,"%f ",(double)(j+off)/8000.);
cannam@86:       else
cannam@86:         fprintf(of,"%f ",(double)j);
cannam@86: 
cannam@86:     if(dB){
cannam@86:       float val;
cannam@86:       if(v[j]==0.)
cannam@86:         val=-140.;
cannam@86:       else
cannam@86:         val=todB(v+j);
cannam@86:       fprintf(of,"%f\n",val);
cannam@86:     }else{
cannam@86:       fprintf(of,"%f\n",v[j]);
cannam@86:     }
cannam@86:   }
cannam@86:   fclose(of);
cannam@86: }
cannam@86: 
cannam@86: void _analysis_output(char *base,int i,float *v,int n,int bark,int dB,
cannam@86:                       ogg_int64_t off){
cannam@86:   if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off);
cannam@86: }
cannam@86: 
cannam@86: #endif
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