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author Nina Engelhardt <nengel@mailbox.tu-berlin.de>
date Tue, 13 Aug 2013 13:12:57 +0200
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1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #ifndef AVUTIL_LOG_H
22 #define AVUTIL_LOG_H
23
24 #include <stdarg.h>
25 //#include "avutil.h"
26
27 /**
28 * Describes 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.).
31 */
32 typedef struct {
33 /**
34 * The name of the class; usually it is the same name as the
35 * context structure type to which the AVClass is associated.
36 */
37 const char* class_name;
38
39 /**
40 * A pointer to a function which returns the name of a context
41 * instance ctx associated with the class.
42 */
43 const char* (*item_name)(void* ctx);
44
45 /**
46 * a pointer to the first option specified in the class if any or NULL
47 *
48 * @see av_set_default_options()
49 */
50 const struct AVOption *option;
51
52 /**
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.
56 */
57
58 int version;
59 } AVClass;
60
61 /* av_log API */
62
63 #define AV_LOG_QUIET -8
64
65 /**
66 * Something went really wrong and we will crash now.
67 */
68 #define AV_LOG_PANIC 0
69
70 /**
71 * Something went wrong and recovery is not possible.
72 * For example, no header was found for a format which depends
73 * on headers or an illegal combination of parameters is used.
74 */
75 #define AV_LOG_FATAL 8
76
77 /**
78 * Something went wrong and cannot losslessly be recovered.
79 * However, not all future data is affected.
80 */
81 #define AV_LOG_ERROR 16
82
83 /**
84 * Something somehow does not look correct. This may or may not
85 * lead to problems. An example would be the use of '-vstrict -2'.
86 */
87 #define AV_LOG_WARNING 24
88
89 #define AV_LOG_INFO 32
90 #define AV_LOG_VERBOSE 40
91
92 /**
93 * Stuff which is only useful for libav* developers.
94 */
95 #define AV_LOG_DEBUG 48
96
97 /**
98 * Sends the specified message to the log if the level is less than or equal
99 * to the current av_log_level. By default, all logging messages are sent to
100 * stderr. This behavior can be altered by setting a different av_vlog callback
101 * function.
102 *
103 * @param avcl A pointer to an arbitrary struct of which the first field is a
104 * pointer to an AVClass struct.
105 * @param level The importance level of the message, lower values signifying
106 * higher importance.
107 * @param fmt The format string (printf-compatible) that specifies how
108 * subsequent arguments are converted to output.
109 * @see av_vlog
110 */
111
112 void av_log(int level, const char *fmt, ...);
113
114 void av_vlog(int level, const char *fmt, va_list);
115 int av_log_get_level(void);
116 void av_log_set_level(int);
117 void av_log_set_callback(void (*)(int, const char*, va_list));
118 void av_log_default_callback(int level, const char* fmt, va_list vl);
119
120 #endif /* AVUTIL_LOG_H */