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1 /********************************************************************
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2 * *
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3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
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4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
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5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
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7 * *
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8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 *
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9 * by the Xiph.Org Foundation http://www.xiph.org/ *
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10 * *
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11 ********************************************************************
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12
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13 function: single-block PCM analysis mode dispatch
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14 last mod: $Id: analysis.c 16226 2009-07-08 06:43:49Z xiphmont $
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15
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16 ********************************************************************/
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17
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18 #include <stdio.h>
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19 #include <string.h>
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20 #include <math.h>
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21 #include <ogg/ogg.h>
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22 #include "vorbis/codec.h"
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23 #include "codec_internal.h"
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24 #include "registry.h"
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25 #include "scales.h"
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26 #include "os.h"
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27 #include "misc.h"
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28
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29 /* decides between modes, dispatches to the appropriate mapping. */
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30 int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
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31 int ret,i;
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32 vorbis_block_internal *vbi=vb->internal;
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33
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34 vb->glue_bits=0;
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35 vb->time_bits=0;
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36 vb->floor_bits=0;
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37 vb->res_bits=0;
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38
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39 /* first things first. Make sure encode is ready */
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40 for(i=0;i<PACKETBLOBS;i++)
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41 oggpack_reset(vbi->packetblob[i]);
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42
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43 /* we only have one mapping type (0), and we let the mapping code
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44 itself figure out what soft mode to use. This allows easier
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45 bitrate management */
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46
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47 if((ret=_mapping_P[0]->forward(vb)))
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48 return(ret);
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49
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50 if(op){
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51 if(vorbis_bitrate_managed(vb))
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52 /* The app is using a bitmanaged mode... but not using the
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53 bitrate management interface. */
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54 return(OV_EINVAL);
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55
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56 op->packet=oggpack_get_buffer(&vb->opb);
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57 op->bytes=oggpack_bytes(&vb->opb);
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58 op->b_o_s=0;
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59 op->e_o_s=vb->eofflag;
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60 op->granulepos=vb->granulepos;
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61 op->packetno=vb->sequence; /* for sake of completeness */
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62 }
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63 return(0);
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64 }
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65
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66 #ifdef ANALYSIS
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67 int analysis_noisy=1;
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68
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69 /* there was no great place to put this.... */
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70 void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
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71 int j;
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72 FILE *of;
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73 char buffer[80];
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74
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75 sprintf(buffer,"%s_%d.m",base,i);
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76 of=fopen(buffer,"w");
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77
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78 if(!of)perror("failed to open data dump file");
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79
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80 for(j=0;j<n;j++){
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81 if(bark){
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82 float b=toBARK((4000.f*j/n)+.25);
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83 fprintf(of,"%f ",b);
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84 }else
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85 if(off!=0)
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86 fprintf(of,"%f ",(double)(j+off)/8000.);
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87 else
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88 fprintf(of,"%f ",(double)j);
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89
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90 if(dB){
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91 float val;
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92 if(v[j]==0.)
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93 val=-140.;
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94 else
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95 val=todB(v+j);
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96 fprintf(of,"%f\n",val);
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97 }else{
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98 fprintf(of,"%f\n",v[j]);
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99 }
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100 }
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101 fclose(of);
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102 }
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103
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104 void _analysis_output(char *base,int i,float *v,int n,int bark,int dB,
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105 ogg_int64_t off){
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106 if(analysis_noisy)_analysis_output_always(base,i,v,n,bark,dB,off);
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107 }
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108
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109 #endif
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110
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111
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112
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113
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114
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115
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116
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117
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118
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119
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120
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