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version.h
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1 /*
2  * copyright (c) 2003 Fabrice Bellard
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 /**
22  * @file
23  * @ingroup lavu
24  * Libavutil version macros
25  */
26 
27 #ifndef AVUTIL_VERSION_H
28 #define AVUTIL_VERSION_H
29 
30 #include "macros.h"
31 
32 /**
33  * @addtogroup version_utils
34  *
35  * Useful to check and match library version in order to maintain
36  * backward compatibility.
37  *
38  * The FFmpeg libraries follow a versioning sheme very similar to
39  * Semantic Versioning (http://semver.org/)
40  * The difference is that the component called PATCH is called MICRO in FFmpeg
41  * and its value is reset to 100 instead of 0 to keep it above or equal to 100.
42  * Also we do not increase MICRO for every bugfix or change in git master.
43  *
44  * Prior to FFmpeg 3.2 point releases did not change any lib version number to
45  * avoid aliassing different git master checkouts.
46  * Starting with FFmpeg 3.2, the released library versions will occupy
47  * a separate MAJOR.MINOR that is not used on the master development branch.
48  * That is if we branch a release of master 55.10.123 we will bump to 55.11.100
49  * for the release and master will continue at 55.12.100 after it. Each new
50  * point release will then bump the MICRO improving the usefulness of the lib
51  * versions.
52  *
53  * @{
54  */
55 
56 #define AV_VERSION_INT(a, b, c) ((a)<<16 | (b)<<8 | (c))
57 #define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
58 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
59 
60 /**
61  * Extract version components from the full ::AV_VERSION_INT int as returned
62  * by functions like ::avformat_version() and ::avcodec_version()
63  */
64 #define AV_VERSION_MAJOR(a) ((a) >> 16)
65 #define AV_VERSION_MINOR(a) (((a) & 0x00FF00) >> 8)
66 #define AV_VERSION_MICRO(a) ((a) & 0xFF)
67 
68 /**
69  * @}
70  */
71 
72 /**
73  * @defgroup lavu_ver Version and Build diagnostics
74  *
75  * Macros and function useful to check at compiletime and at runtime
76  * which version of libavutil is in use.
77  *
78  * @{
79  */
80 
81 #define LIBAVUTIL_VERSION_MAJOR 55
82 #define LIBAVUTIL_VERSION_MINOR 42
83 #define LIBAVUTIL_VERSION_MICRO 100
84 
85 #define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
86  LIBAVUTIL_VERSION_MINOR, \
87  LIBAVUTIL_VERSION_MICRO)
88 #define LIBAVUTIL_VERSION AV_VERSION(LIBAVUTIL_VERSION_MAJOR, \
89  LIBAVUTIL_VERSION_MINOR, \
90  LIBAVUTIL_VERSION_MICRO)
91 #define LIBAVUTIL_BUILD LIBAVUTIL_VERSION_INT
92 
93 #define LIBAVUTIL_IDENT "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
94 
95 /**
96  * @defgroup lavu_depr_guards Deprecation Guards
97  * FF_API_* defines may be placed below to indicate public API that will be
98  * dropped at a future version bump. The defines themselves are not part of
99  * the public API and may change, break or disappear at any time.
100  *
101  * @note, when bumping the major version it is recommended to manually
102  * disable each FF_API_* in its own commit instead of disabling them all
103  * at once through the bump. This improves the git bisect-ability of the change.
104  *
105  * @{
106  */
107 
108 #ifndef FF_API_VDPAU
109 #define FF_API_VDPAU (LIBAVUTIL_VERSION_MAJOR < 56)
110 #endif
111 #ifndef FF_API_XVMC
112 #define FF_API_XVMC (LIBAVUTIL_VERSION_MAJOR < 56)
113 #endif
114 #ifndef FF_API_OPT_TYPE_METADATA
115 #define FF_API_OPT_TYPE_METADATA (LIBAVUTIL_VERSION_MAJOR < 56)
116 #endif
117 #ifndef FF_API_DLOG
118 #define FF_API_DLOG (LIBAVUTIL_VERSION_MAJOR < 56)
119 #endif
120 #ifndef FF_API_VAAPI
121 #define FF_API_VAAPI (LIBAVUTIL_VERSION_MAJOR < 56)
122 #endif
123 #ifndef FF_API_FRAME_QP
124 #define FF_API_FRAME_QP (LIBAVUTIL_VERSION_MAJOR < 56)
125 #endif
126 #ifndef FF_API_PLUS1_MINUS1
127 #define FF_API_PLUS1_MINUS1 (LIBAVUTIL_VERSION_MAJOR < 56)
128 #endif
129 #ifndef FF_API_ERROR_FRAME
130 #define FF_API_ERROR_FRAME (LIBAVUTIL_VERSION_MAJOR < 56)
131 #endif
132 #ifndef FF_API_CRC_BIG_TABLE
133 #define FF_API_CRC_BIG_TABLE (LIBAVUTIL_VERSION_MAJOR < 56)
134 #endif
135 #ifndef FF_API_PKT_PTS
136 #define FF_API_PKT_PTS (LIBAVUTIL_VERSION_MAJOR < 56)
137 #endif
138 
139 
140 /**
141  * @}
142  * @}
143  */
144 
145 #endif /* AVUTIL_VERSION_H */
Utility Preprocessor macros.