Support shared pthreads-win32.
[libav.git] / libavutil / log.h
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1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
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21#ifndef FFMPEG_LOG_H
22#define FFMPEG_LOG_H
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23
24#include <stdarg.h>
25
26/**
27 * Used by av_log
28 */
29typedef struct AVCLASS AVClass;
30struct AVCLASS {
31 const char* class_name;
32 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
33 or AVFormatContext, which begin with an AVClass.
34 Needed because av_log is in libavcodec and has no visibility
35 of AVIn/OutputFormat */
3666f75d 36 const struct AVOption *option;
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37};
38
39/* av_log API */
40
434f2c18 41#if LIBAVUTIL_VERSION_INT < (50<<16)
4b45de0e 42#define AV_LOG_QUIET -1
434f2c18 43#define AV_LOG_FATAL 0
4b45de0e 44#define AV_LOG_ERROR 0
434f2c18 45#define AV_LOG_WARNING 1
4b45de0e 46#define AV_LOG_INFO 1
434f2c18 47#define AV_LOG_VERBOSE 1
4b45de0e 48#define AV_LOG_DEBUG 2
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49#else
50#define AV_LOG_QUIET -8
51
52/**
53 * something went really wrong and we will crash now
54 */
55#define AV_LOG_PANIC 0
56
57/**
58 * something went wrong and recovery is not possible
59 * like no header in a format which depends on it or a combination
60 * of parameters which are not allowed
61 */
62#define AV_LOG_FATAL 8
63
64/**
65 * something went wrong and cannot losslessly be recovered
66 * but not all future data is affected
67 */
68#define AV_LOG_ERROR 16
69
70/**
71 * something somehow does not look correct / something which may or may not
72 * lead to some problems like use of -vstrict -2
73 */
74#define AV_LOG_WARNING 24
75
76#define AV_LOG_INFO 32
77#define AV_LOG_VERBOSE 40
78
79/**
80 * stuff which is only useful for libav* developers
81 */
82#define AV_LOG_DEBUG 48
83#endif
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84
85#if LIBAVUTIL_VERSION_INT < (50<<16)
918a4591 86extern int av_log_level;
a309073b 87#endif
4b45de0e 88
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89/**
90 * Send the specified message to the log if the level is less than or equal to
91 * the current av_log_level. By default, all logging messages are sent to
92 * stderr. This behavior can be altered by setting a different av_vlog callback
93 * function.
94 *
95 * @param avcl A pointer to an arbitrary struct of which the first field is a
96 * pointer to an AVClass struct.
97 * @param level The importance level of the message, lower values signifying
98 * higher importance.
99 * @param fmt The format string (printf-compatible) that specifies how
100 * subsequent arguments are converted to output.
101 * @see av_vlog
102 */
4b45de0e 103#ifdef __GNUC__
07c37ca7 104void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
4b45de0e 105#else
07c37ca7 106void av_log(void*, int level, const char *fmt, ...);
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107#endif
108
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109void av_vlog(void*, int level, const char *fmt, va_list);
110int av_log_get_level(void);
111void av_log_set_level(int);
112void av_log_set_callback(void (*)(void*, int, const char*, va_list));
113void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
4b45de0e 114
5b21bdab 115#endif /* FFMPEG_LOG_H */