Fix off-by-1 error in the tag parsing code.
[libav.git] / libavutil / log.c
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1/*
2 * log functions
3 * Copyright (c) 2003 Michel Bardiaux
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
4b45de0e 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
ba87f080 23 * @file
7d685b48 24 * logging functions
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25 */
26
27#include "avutil.h"
77652a6a 28#include "log.h"
4b45de0e 29
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30#if LIBAVUTIL_VERSION_MAJOR > 50
31static
32#endif
918a4591 33int av_log_level = AV_LOG_INFO;
4b45de0e 34
411983c1 35void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
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36{
37 static int print_prefix=1;
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38 static int count;
39 static char line[1024], prev[1024];
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40 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
41 if(level>av_log_level)
42 return;
43#undef fprintf
44 if(print_prefix && avc) {
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45 snprintf(line, sizeof(line), "[%s @ %p]", avc->item_name(ptr), ptr);
46 }else
47 line[0]=0;
4b45de0e 48
b9c353ff 49 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
4b45de0e 50
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51 print_prefix= line[strlen(line)-1] == '\n';
52 if(print_prefix && !strcmp(line, prev)){
53 count++;
54 return;
55 }
56 if(count>0){
57 fprintf(stderr, " Last message repeated %d times\n", count);
58 count=0;
59 }
60 fputs(line, stderr);
61 strcpy(prev, line);
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62}
63
64static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
65
66void av_log(void* avcl, int level, const char *fmt, ...)
67{
68 va_list vl;
69 va_start(vl, fmt);
70 av_vlog(avcl, level, fmt, vl);
71 va_end(vl);
72}
73
74void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
75{
76 av_log_callback(avcl, level, fmt, vl);
77}
78
79int av_log_get_level(void)
80{
81 return av_log_level;
82}
83
84void av_log_set_level(int level)
85{
86 av_log_level = level;
87}
88
89void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
90{
91 av_log_callback = callback;
92}