Make it possible for a log context to keep track of its parent context.
[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
51e026d1 27#include <unistd.h>
62044024 28#include <stdlib.h>
4b45de0e 29#include "avutil.h"
77652a6a 30#include "log.h"
4b45de0e 31
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32#if LIBAVUTIL_VERSION_MAJOR > 50
33static
34#endif
918a4591 35int av_log_level = AV_LOG_INFO;
4b45de0e 36
62044024 37static int use_ansi_color=-1;
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38
39#undef fprintf
40static void colored_fputs(int color, const char *str){
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41 if(use_ansi_color<0){
42#if HAVE_ISATTY && !defined(_WIN32)
43 use_ansi_color= getenv("TERM") && !getenv("NO_COLOR") && isatty(2);
44#else
45 use_ansi_color= 0;
46#endif
47 }
48
49 if(use_ansi_color){
7328cdfa 50 fprintf(stderr, "\033[%d;3%dm", color>>4, color&15);
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51 }
52 fputs(str, stderr);
62044024 53 if(use_ansi_color){
841073ce 54 fprintf(stderr, "\033[0m");
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55 }
56}
57
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58const char* av_default_item_name(void* ptr){
59 return (*(AVClass**)ptr)->class_name;
60}
61
411983c1 62void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
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63{
64 static int print_prefix=1;
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65 static int count;
66 static char line[1024], prev[1024];
51e026d1 67 static const uint8_t color[]={0x41,0x41,0x11,0x03,9,9,9};
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68 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
69 if(level>av_log_level)
70 return;
71#undef fprintf
72 if(print_prefix && avc) {
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73 snprintf(line, sizeof(line), "[%s @ %p]", avc->item_name(ptr), ptr);
74 }else
75 line[0]=0;
4b45de0e 76
b9c353ff 77 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
4b45de0e 78
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79 print_prefix= line[strlen(line)-1] == '\n';
80 if(print_prefix && !strcmp(line, prev)){
81 count++;
82 return;
83 }
84 if(count>0){
85 fprintf(stderr, " Last message repeated %d times\n", count);
86 count=0;
87 }
51e026d1 88 colored_fputs(color[av_clip(level>>3, 0, 6)], line);
b9c353ff 89 strcpy(prev, line);
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90}
91
92static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
93
94void av_log(void* avcl, int level, const char *fmt, ...)
95{
3fe1ec39 96 AVClass* avc= avcl ? *(AVClass**)avcl : NULL;
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97 va_list vl;
98 va_start(vl, fmt);
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99 if(avc && avc->version >= (50<<16 | 15<<8 | 2) && avc->log_level_offset_offset && level>=AV_LOG_FATAL)
100 level += *(int*)(((uint8_t*)avcl) + avc->log_level_offset_offset);
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101 av_vlog(avcl, level, fmt, vl);
102 va_end(vl);
103}
104
105void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
106{
107 av_log_callback(avcl, level, fmt, vl);
108}
109
110int av_log_get_level(void)
111{
112 return av_log_level;
113}
114
115void av_log_set_level(int level)
116{
117 av_log_level = level;
118}
119
120void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
121{
122 av_log_callback = callback;
123}