Print parent log context too, if available.
[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
24 * logging functions
25 */
26
27 #include <unistd.h>
28 #include <stdlib.h>
29 #include "avutil.h"
30 #include "log.h"
31
32 #if LIBAVUTIL_VERSION_MAJOR > 50
33 static
34 #endif
35 int av_log_level = AV_LOG_INFO;
36
37 static int use_ansi_color=-1;
38
39 #undef fprintf
40 static void colored_fputs(int color, const char *str){
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){
50 fprintf(stderr, "\033[%d;3%dm", color>>4, color&15);
51 }
52 fputs(str, stderr);
53 if(use_ansi_color){
54 fprintf(stderr, "\033[0m");
55 }
56 }
57
58 const char* av_default_item_name(void* ptr){
59 return (*(AVClass**)ptr)->class_name;
60 }
61
62 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
63 {
64 static int print_prefix=1;
65 static int count;
66 static char line[1024], prev[1024];
67 static const uint8_t color[]={0x41,0x41,0x11,0x03,9,9,9};
68 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
69 if(level>av_log_level)
70 return;
71 line[0]=0;
72 #undef fprintf
73 if(print_prefix && avc) {
74 if(avc->version >= (50<<16 | 15<<8 | 3) && avc->parent_log_context_offset){
75 AVClass** parent= *(AVClass***)(((uint8_t*)ptr) + avc->parent_log_context_offset);
76 if(parent && *parent){
77 snprintf(line, sizeof(line), "[%s @ %p]", (*parent)->item_name(parent), parent);
78 }
79 }
80 snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p]", avc->item_name(ptr), ptr);
81 }
82
83 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
84
85 print_prefix= line[strlen(line)-1] == '\n';
86 if(print_prefix && !strcmp(line, prev)){
87 count++;
88 return;
89 }
90 if(count>0){
91 fprintf(stderr, " Last message repeated %d times\n", count);
92 count=0;
93 }
94 colored_fputs(color[av_clip(level>>3, 0, 6)], line);
95 strcpy(prev, line);
96 }
97
98 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
99
100 void av_log(void* avcl, int level, const char *fmt, ...)
101 {
102 AVClass* avc= avcl ? *(AVClass**)avcl : NULL;
103 va_list vl;
104 va_start(vl, fmt);
105 if(avc && avc->version >= (50<<16 | 15<<8 | 2) && avc->log_level_offset_offset && level>=AV_LOG_FATAL)
106 level += *(int*)(((uint8_t*)avcl) + avc->log_level_offset_offset);
107 av_vlog(avcl, level, fmt, vl);
108 va_end(vl);
109 }
110
111 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
112 {
113 av_log_callback(avcl, level, fmt, vl);
114 }
115
116 int av_log_get_level(void)
117 {
118 return av_log_level;
119 }
120
121 void av_log_set_level(int level)
122 {
123 av_log_level = level;
124 }
125
126 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
127 {
128 av_log_callback = callback;
129 }