analysis.c - vx32 - Local 9vx git repository for patches.
(HTM) git clone git://r-36.net/vx32
(DIR) Log
(DIR) Files
(DIR) Refs
---
analysis.c (3057B)
---
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 1994-2002 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
10 * *
11 ********************************************************************
12
13 function: single-block PCM analysis mode dispatch
14 last mod: $Id: analysis.c 1919 2005-07-24 14:18:04Z baford $
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 int analysis_noisy=1;
30
31 /* decides between modes, dispatches to the appropriate mapping. */
32 int vorbis_analysis(vorbis_block *vb, ogg_packet *op){
33 int ret;
34
35 vb->glue_bits=0;
36 vb->time_bits=0;
37 vb->floor_bits=0;
38 vb->res_bits=0;
39
40 /* first things first. Make sure encode is ready */
41 oggpack_reset(&vb->opb);
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 /* there was no great place to put this.... */
67 void _analysis_output_always(char *base,int i,float *v,int n,int bark,int dB,ogg_int64_t off){
68 int j;
69 FILE *of;
70 char buffer[80];
71
72 /* if(i==5870){*/
73 sprintf(buffer,"%s_%d.m",base,i);
74 of=fopen(buffer,"w");
75
76 if(!of)perror("failed to open data dump file");
77
78 for(j=0;j<n;j++){
79 if(bark){
80 float b=toBARK((4000.f*j/n)+.25);
81 fprintf(of,"%f ",b);
82 }else
83 if(off!=0)
84 fprintf(of,"%f ",(double)(j+off)/8000.);
85 else
86 fprintf(of,"%f ",(double)j);
87
88 if(dB){
89 float val;
90 if(v[j]==0.)
91 val=-140.;
92 else
93 val=todB(v+j);
94 fprintf(of,"%f\n",val);
95 }else{
96 fprintf(of,"%f\n",v[j]);
97 }
98 }
99 fclose(of);
100 /* } */
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
109
110
111
112
113
114
115
116
117
118
119