4bb9652c2c71e22dfb072377905f78eeaf1b189a
[libav.git] / libavutil / log.c
1 /*
2 * log functions
3 * Copyright (c) 2003 Michel Bardiaux
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file libavutil/log.c
24 * logging functions
25 */
26
27 #include "avutil.h"
28 #include "log.h"
29
30 int av_log_level = AV_LOG_INFO;
31
32 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
33 {
34 static int print_prefix=1;
35 static int count;
36 static char line[1024], prev[1024];
37 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
38 if(level>av_log_level)
39 return;
40 #undef fprintf
41 if(print_prefix && avc) {
42 snprintf(line, sizeof(line), "[%s @ %p]", avc->item_name(ptr), ptr);
43 }else
44 line[0]=0;
45
46 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
47
48 print_prefix= line[strlen(line)-1] == '\n';
49 if(print_prefix && !strcmp(line, prev)){
50 count++;
51 return;
52 }
53 if(count>0){
54 fprintf(stderr, " Last message repeated %d times\n", count);
55 count=0;
56 }
57 fputs(line, stderr);
58 strcpy(prev, line);
59 }
60
61 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
62
63 void av_log(void* avcl, int level, const char *fmt, ...)
64 {
65 va_list vl;
66 va_start(vl, fmt);
67 av_vlog(avcl, level, fmt, vl);
68 va_end(vl);
69 }
70
71 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
72 {
73 av_log_callback(avcl, level, fmt, vl);
74 }
75
76 int av_log_get_level(void)
77 {
78 return av_log_level;
79 }
80
81 void av_log_set_level(int level)
82 {
83 av_log_level = level;
84 }
85
86 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
87 {
88 av_log_callback = callback;
89 }