deab11965dee28aecd411819070b77b022c6186b
[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 "avutil.h"
30 #include "log.h"
31
32 static int av_log_level = AV_LOG_INFO;
33 static int flags;
34
35 #if defined(_WIN32) && !defined(__MINGW32CE__)
36 #include <windows.h>
37 static const uint8_t color[] = {12,12,12,14,7,7,7};
38 static int16_t background, attr_orig;
39 static HANDLE con;
40 #define set_color(x) SetConsoleTextAttribute(con, background | color[x])
41 #define reset_color() SetConsoleTextAttribute(con, attr_orig)
42 #else
43 static const uint8_t color[]={0x41,0x41,0x11,0x03,9,9,9};
44 #define set_color(x) fprintf(stderr, "\033[%d;3%dm", color[x]>>4, color[x]&15)
45 #define reset_color() fprintf(stderr, "\033[0m")
46 #endif
47 static int use_color=-1;
48
49 #undef fprintf
50 static void colored_fputs(int level, const char *str){
51 if(use_color<0){
52 #if defined(_WIN32) && !defined(__MINGW32CE__)
53 CONSOLE_SCREEN_BUFFER_INFO con_info;
54 con = GetStdHandle(STD_ERROR_HANDLE);
55 use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") && !getenv("FFMPEG_FORCE_NOCOLOR");
56 if (use_color) {
57 GetConsoleScreenBufferInfo(con, &con_info);
58 attr_orig = con_info.wAttributes;
59 background = attr_orig & 0xF0;
60 }
61 #elif HAVE_ISATTY
62 use_color= !getenv("NO_COLOR") && !getenv("FFMPEG_FORCE_NOCOLOR") &&
63 (getenv("TERM") && isatty(2) || getenv("FFMPEG_FORCE_COLOR"));
64 #else
65 use_color= getenv("FFMPEG_FORCE_COLOR") && !getenv("NO_COLOR") && !getenv("FFMPEG_FORCE_NOCOLOR");
66 #endif
67 }
68
69 if(use_color){
70 set_color(level);
71 }
72 fputs(str, stderr);
73 if(use_color){
74 reset_color();
75 }
76 }
77
78 const char* av_default_item_name(void* ptr){
79 return (*(AVClass**)ptr)->class_name;
80 }
81
82 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
83 {
84 static int print_prefix=1;
85 static int count;
86 static char line[1024], prev[1024];
87 static int is_atty;
88 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
89 if(level>av_log_level)
90 return;
91 line[0]=0;
92 #undef fprintf
93 if(print_prefix && avc) {
94 if (avc->parent_log_context_offset) {
95 AVClass** parent= *(AVClass***)(((uint8_t*)ptr) + avc->parent_log_context_offset);
96 if(parent && *parent){
97 snprintf(line, sizeof(line), "[%s @ %p] ", (*parent)->item_name(parent), parent);
98 }
99 }
100 snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ", avc->item_name(ptr), ptr);
101 }
102
103 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
104
105 print_prefix= line[strlen(line)-1] == '\n';
106
107 #if HAVE_ISATTY
108 if(!is_atty) is_atty= isatty(2) ? 1 : -1;
109 #endif
110
111 if(print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strcmp(line, prev)){
112 count++;
113 if(is_atty==1)
114 fprintf(stderr, " Last message repeated %d times\r", count);
115 return;
116 }
117 if(count>0){
118 fprintf(stderr, " Last message repeated %d times\n", count);
119 count=0;
120 }
121 colored_fputs(av_clip(level>>3, 0, 6), line);
122 strcpy(prev, line);
123 }
124
125 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
126
127 void av_log(void* avcl, int level, const char *fmt, ...)
128 {
129 AVClass* avc= avcl ? *(AVClass**)avcl : NULL;
130 va_list vl;
131 va_start(vl, fmt);
132 if(avc && avc->version >= (50<<16 | 15<<8 | 2) && avc->log_level_offset_offset && level>=AV_LOG_FATAL)
133 level += *(int*)(((uint8_t*)avcl) + avc->log_level_offset_offset);
134 av_vlog(avcl, level, fmt, vl);
135 va_end(vl);
136 }
137
138 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
139 {
140 av_log_callback(avcl, level, fmt, vl);
141 }
142
143 int av_log_get_level(void)
144 {
145 return av_log_level;
146 }
147
148 void av_log_set_level(int level)
149 {
150 av_log_level = level;
151 }
152
153 void av_log_set_flags(int arg)
154 {
155 flags= arg;
156 }
157
158 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
159 {
160 av_log_callback = callback;
161 }