00001 /* 00002 * log functions 00003 * Copyright (c) 2003 Michel Bardiaux 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #include <unistd.h> 00028 #include <stdlib.h> 00029 #include "avutil.h" 00030 #include "log.h" 00031 00032 static int av_log_level = AV_LOG_INFO; 00033 static int flags; 00034 00035 #if defined(_WIN32) && !defined(__MINGW32CE__) 00036 #include <windows.h> 00037 static const uint8_t color[] = {12,12,12,14,7,7,7}; 00038 static int16_t background, attr_orig; 00039 static HANDLE con; 00040 #define set_color(x) SetConsoleTextAttribute(con, background | color[x]) 00041 #define reset_color() SetConsoleTextAttribute(con, attr_orig) 00042 #else 00043 static const uint8_t color[]={0x41,0x41,0x11,0x03,9,9,9}; 00044 #define set_color(x) fprintf(stderr, "033円[%d;3%dm", color[x]>>4, color[x]&15) 00045 #define reset_color() fprintf(stderr, "033円[0m") 00046 #endif 00047 static int use_color=-1; 00048 00049 #undef fprintf 00050 static void colored_fputs(int level, const char *str){ 00051 if(use_color<0){ 00052 #if defined(_WIN32) && !defined(__MINGW32CE__) 00053 CONSOLE_SCREEN_BUFFER_INFO con_info; 00054 con = GetStdHandle(STD_ERROR_HANDLE); 00055 use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") && !getenv("FFMPEG_FORCE_NOCOLOR"); 00056 if (use_color) { 00057 GetConsoleScreenBufferInfo(con, &con_info); 00058 attr_orig = con_info.wAttributes; 00059 background = attr_orig & 0xF0; 00060 } 00061 #elif HAVE_ISATTY 00062 use_color= !getenv("NO_COLOR") && !getenv("FFMPEG_FORCE_NOCOLOR") && 00063 (getenv("TERM") && isatty(2) || getenv("FFMPEG_FORCE_COLOR")); 00064 #else 00065 use_color= getenv("FFMPEG_FORCE_COLOR") && !getenv("NO_COLOR") && !getenv("FFMPEG_FORCE_NOCOLOR"); 00066 #endif 00067 } 00068 00069 if(use_color){ 00070 set_color(level); 00071 } 00072 fputs(str, stderr); 00073 if(use_color){ 00074 reset_color(); 00075 } 00076 } 00077 00078 const char* av_default_item_name(void* ptr){ 00079 return (*(AVClass**)ptr)->class_name; 00080 } 00081 00082 static void sanitize(uint8_t *line){ 00083 while(*line){ 00084 if(*line < 0x08 || (*line > 0x0D && *line < 0x20)) 00085 *line='?'; 00086 line++; 00087 } 00088 } 00089 00090 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl) 00091 { 00092 static int print_prefix=1; 00093 static int count; 00094 static char prev[1024]; 00095 char line[1024]; 00096 static int is_atty; 00097 AVClass* avc= ptr ? *(AVClass**)ptr : NULL; 00098 if(level>av_log_level) 00099 return; 00100 line[0]=0; 00101 #undef fprintf 00102 if(print_prefix && avc) { 00103 if (avc->parent_log_context_offset) { 00104 AVClass** parent= *(AVClass***)(((uint8_t*)ptr) + avc->parent_log_context_offset); 00105 if(parent && *parent){ 00106 snprintf(line, sizeof(line), "[%s @ %p] ", (*parent)->item_name(parent), parent); 00107 } 00108 } 00109 snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ", avc->item_name(ptr), ptr); 00110 } 00111 00112 vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl); 00113 00114 print_prefix = strlen(line) && line[strlen(line)-1] == '\n'; 00115 00116 #if HAVE_ISATTY 00117 if(!is_atty) is_atty= isatty(2) ? 1 : -1; 00118 #endif 00119 00120 if(print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strcmp(line, prev)){ 00121 count++; 00122 if(is_atty==1) 00123 fprintf(stderr, " Last message repeated %d times\r", count); 00124 return; 00125 } 00126 if(count>0){ 00127 fprintf(stderr, " Last message repeated %d times\n", count); 00128 count=0; 00129 } 00130 strcpy(prev, line); 00131 sanitize(line); 00132 colored_fputs(av_clip(level>>3, 0, 6), line); 00133 } 00134 00135 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback; 00136 00137 void av_log(void* avcl, int level, const char *fmt, ...) 00138 { 00139 AVClass* avc= avcl ? *(AVClass**)avcl : NULL; 00140 va_list vl; 00141 va_start(vl, fmt); 00142 if(avc && avc->version >= (50<<16 | 15<<8 | 2) && avc->log_level_offset_offset && level>=AV_LOG_FATAL) 00143 level += *(int*)(((uint8_t*)avcl) + avc->log_level_offset_offset); 00144 av_vlog(avcl, level, fmt, vl); 00145 va_end(vl); 00146 } 00147 00148 void av_vlog(void* avcl, int level, const char *fmt, va_list vl) 00149 { 00150 av_log_callback(avcl, level, fmt, vl); 00151 } 00152 00153 int av_log_get_level(void) 00154 { 00155 return av_log_level; 00156 } 00157 00158 void av_log_set_level(int level) 00159 { 00160 av_log_level = level; 00161 } 00162 00163 void av_log_set_flags(int arg) 00164 { 00165 flags= arg; 00166 } 00167 00168 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list)) 00169 { 00170 av_log_callback = callback; 00171 }