4d2b539deec7e0eea44226701b5e04cf803d85df
[libav.git] / libavutil / log.c
1 /*
2 * log functions
3 * Copyright (c) 2003 Michel Bardiaux
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "avstring.h"
30 #include "avutil.h"
31 #include "log.h"
32
33 static int av_log_level = AV_LOG_INFO;
34 static int flags;
35
36 #if defined(_WIN32) && !defined(__MINGW32CE__)
37 #include <windows.h>
38 static const uint8_t color[] = {12,12,12,14,7,7,7};
39 static int16_t background, attr_orig;
40 static HANDLE con;
41 #define set_color(x) SetConsoleTextAttribute(con, background | color[x])
42 #define reset_color() SetConsoleTextAttribute(con, attr_orig)
43 #else
44 static const uint8_t color[]={0x41,0x41,0x11,0x03,9,9,9};
45 #define set_color(x) fprintf(stderr, "\033[%d;3%dm", color[x]>>4, color[x]&15)
46 #define reset_color() fprintf(stderr, "\033[0m")
47 #endif
48 static int use_color=-1;
49
50 #undef fprintf
51 static void colored_fputs(int level, const char *str){
52 if(use_color<0){
53 #if defined(_WIN32) && !defined(__MINGW32CE__)
54 CONSOLE_SCREEN_BUFFER_INFO con_info;
55 con = GetStdHandle(STD_ERROR_HANDLE);
56 use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR");
57 if (use_color) {
58 GetConsoleScreenBufferInfo(con, &con_info);
59 attr_orig = con_info.wAttributes;
60 background = attr_orig & 0xF0;
61 }
62 #elif HAVE_ISATTY
63 use_color= !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
64 (getenv("TERM") && isatty(2) || getenv("AV_LOG_FORCE_COLOR"));
65 #else
66 use_color= getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR");
67 #endif
68 }
69
70 if(use_color){
71 set_color(level);
72 }
73 fputs(str, stderr);
74 if(use_color){
75 reset_color();
76 }
77 }
78
79 const char* av_default_item_name(void* ptr){
80 return (*(AVClass**)ptr)->class_name;
81 }
82
83 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
84 {
85 static int print_prefix=1;
86 static int count;
87 static char prev[1024];
88 char line[1024];
89 static int is_atty;
90 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
91 if(level>av_log_level)
92 return;
93 line[0]=0;
94 #undef fprintf
95 if(print_prefix && avc) {
96 if (avc->parent_log_context_offset) {
97 AVClass** parent= *(AVClass***)(((uint8_t*)ptr) + avc->parent_log_context_offset);
98 if(parent && *parent){
99 snprintf(line, sizeof(line), "[%s @ %p] ", (*parent)->item_name(parent), parent);
100 }
101 }
102 snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ", avc->item_name(ptr), ptr);
103 }
104
105 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
106
107 print_prefix = strlen(line) && line[strlen(line)-1] == '\n';
108
109 #if HAVE_ISATTY
110 if(!is_atty) is_atty= isatty(2) ? 1 : -1;
111 #endif
112
113 if(print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strncmp(line, prev, sizeof line)){
114 count++;
115 if(is_atty==1)
116 fprintf(stderr, " Last message repeated %d times\r", count);
117 return;
118 }
119 if(count>0){
120 fprintf(stderr, " Last message repeated %d times\n", count);
121 count=0;
122 }
123 colored_fputs(av_clip(level>>3, 0, 6), line);
124 av_strlcpy(prev, line, sizeof line);
125 }
126
127 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
128
129 void av_log(void* avcl, int level, const char *fmt, ...)
130 {
131 AVClass* avc= avcl ? *(AVClass**)avcl : NULL;
132 va_list vl;
133 va_start(vl, fmt);
134 if(avc && avc->version >= (50<<16 | 15<<8 | 2) && avc->log_level_offset_offset && level>=AV_LOG_FATAL)
135 level += *(int*)(((uint8_t*)avcl) + avc->log_level_offset_offset);
136 av_vlog(avcl, level, fmt, vl);
137 va_end(vl);
138 }
139
140 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
141 {
142 av_log_callback(avcl, level, fmt, vl);
143 }
144
145 int av_log_get_level(void)
146 {
147 return av_log_level;
148 }
149
150 void av_log_set_level(int level)
151 {
152 av_log_level = level;
153 }
154
155 void av_log_set_flags(int arg)
156 {
157 flags= arg;
158 }
159
160 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
161 {
162 av_log_callback = callback;
163 }