2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 * Describe the class of an AVClass context structure. That is an
29 * arbitrary struct of which the first field is a pointer to an
30 * AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).
34 * The name of the class; usually it is the same name as the
35 * context structure type to which the AVClass is associated.
37 const char* class_name;
40 * A pointer to a function which returns the name of a context
41 * instance ctx associated with the class.
43 const char* (*item_name)(void* ctx);
46 * a pointer to the first option specified in the class if any or NULL
48 * @see av_set_default_options()
50 const struct AVOption *option;
53 * LIBAVUTIL_VERSION with which this structure was created.
54 * This is used to allow fields to be added without requiring major
55 * version bumps everywhere.
61 * Offset in the structure where log_level_offset is stored.
62 * 0 means there is no such variable
64 int log_level_offset_offset;
67 * Offset in the structure where a pointer to the parent context for loging is stored.
68 * for example a decoder that uses eval.c could pass its AVCodecContext to eval as such
69 * parent context. And a av_log() implementation could then display the parent context
70 * can be NULL of course
72 int parent_log_context_offset;
77 #define AV_LOG_QUIET -8
80 * Something went really wrong and we will crash now.
82 #define AV_LOG_PANIC 0
85 * Something went wrong and recovery is not possible.
86 * For example, no header was found for a format which depends
87 * on headers or an illegal combination of parameters is used.
89 #define AV_LOG_FATAL 8
92 * Something went wrong and cannot losslessly be recovered.
93 * However, not all future data is affected.
95 #define AV_LOG_ERROR 16
98 * Something somehow does not look correct. This may or may not
99 * lead to problems. An example would be the use of '-vstrict -2'.
101 #define AV_LOG_WARNING 24
103 #define AV_LOG_INFO 32
104 #define AV_LOG_VERBOSE 40
107 * Stuff which is only useful for libav* developers.
109 #define AV_LOG_DEBUG 48
112 * Send the specified message to the log if the level is less than or equal
113 * to the current av_log_level. By default, all logging messages are sent to
114 * stderr. This behavior can be altered by setting a different av_vlog callback
117 * @param avcl A pointer to an arbitrary struct of which the first field is a
118 * pointer to an AVClass struct.
119 * @param level The importance level of the message, lower values signifying
121 * @param fmt The format string (printf-compatible) that specifies how
122 * subsequent arguments are converted to output.
126 void av_log(void *avcl, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
128 void av_log(void *avcl, int level, const char *fmt, ...);
131 void av_vlog(void *avcl, int level, const char *fmt, va_list);
132 int av_log_get_level(void);
133 void av_log_set_level(int);
134 void av_log_set_callback(void (*)(void*, int, const char*, va_list));
135 void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
136 const char* av_default_item_name(void* ctx);
138 #endif /* AVUTIL_LOG_H */