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 log.c
  24  * log.
  25  */
  26
  27 #include "avutil.h"
  28
  29 int av_log_level = AV_LOG_INFO;
  30
  31 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
  32 {
  33     static int print_prefix=1;
  34     AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
  35     if(level>av_log_level)
  36         return;
  37 #undef fprintf
  38     if(print_prefix && avc) {
  39             fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
  40     }
  41 #define fprintf please_use_av_log
  42
  43     print_prefix= strstr(fmt, "\n") != NULL;
  44
  45     vfprintf(stderr, fmt, vl);
  46 }
  47
  48 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
  49
  50 void av_log(void* avcl, int level, const char *fmt, ...)
  51 {
  52     va_list vl;
  53     va_start(vl, fmt);
  54     av_vlog(avcl, level, fmt, vl);
  55     va_end(vl);
  56 }
  57
  58 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
  59 {
  60     av_log_callback(avcl, level, fmt, vl);
  61 }
  62
  63 int av_log_get_level(void)
  64 {
  65     return av_log_level;
  66 }
  67
  68 void av_log_set_level(int level)
  69 {
  70     av_log_level = level;
  71 }
  72
  73 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
  74 {
  75     av_log_callback = callback;
  76 }