avcodec/flacenc: Remove always-true check

[ffmpeg] / libavutil / version.h

diff --git a/libavutil/version.h b/libavutil/version.h
index e5fbd4ca81273904d46bde1a7814d82734390fba..e11eaa20d03d69bdb86cadf007393a766d383fd8 100644 (file)
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -1,47 +1,72 @@
 /*
- * This file is part of Libav.
+ * copyright (c) 2003 Fabrice Bellard
  *
- * Libav is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+/**
+ * @file
+ * @ingroup lavu
+ * Libavutil version macros
+ */
+
 #ifndef AVUTIL_VERSION_H
 #define AVUTIL_VERSION_H
 
 #include "macros.h"
 
 /**
- * @defgroup version_utils Library Version Macros
+ * @addtogroup version_utils
  *
  * Useful to check and match library version in order to maintain
  * backward compatibility.
  *
+ * The FFmpeg libraries follow a versioning sheme very similar to
+ * Semantic Versioning (http://semver.org/)
+ * The difference is that the component called PATCH is called MICRO in FFmpeg
+ * and its value is reset to 100 instead of 0 to keep it above or equal to 100.
+ * Also we do not increase MICRO for every bugfix or change in git master.
+ *
+ * Prior to FFmpeg 3.2 point releases did not change any lib version number to
+ * avoid aliassing different git master checkouts.
+ * Starting with FFmpeg 3.2, the released library versions will occupy
+ * a separate MAJOR.MINOR that is not used on the master development branch.
+ * That is if we branch a release of master 55.10.123 we will bump to 55.11.100
+ * for the release and master will continue at 55.12.100 after it. Each new
+ * point release will then bump the MICRO improving the usefulness of the lib
+ * versions.
+ *
  * @{
  */
 
-#define AV_VERSION_INT(a, b, c) (a<<16 | b<<8 | c)
+#define AV_VERSION_INT(a, b, c) ((a)<<16 | (b)<<8 | (c))
 #define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
 
 /**
- * @}
+ * Extract version components from the full ::AV_VERSION_INT int as returned
+ * by functions like ::avformat_version() and ::avcodec_version()
  */
+#define AV_VERSION_MAJOR(a) ((a) >> 16)
+#define AV_VERSION_MINOR(a) (((a) & 0x00FF00) >> 8)
+#define AV_VERSION_MICRO(a) ((a) & 0xFF)
 
 /**
- * @file
- * @ingroup lavu
- * Libavutil version macros
+ * @}
  */
 
 /**
@@ -53,9 +78,9 @@
  * @{
  */
 
-#define LIBAVUTIL_VERSION_MAJOR 56
-#define LIBAVUTIL_VERSION_MINOR  7
-#define LIBAVUTIL_VERSION_MICRO  1
+#define LIBAVUTIL_VERSION_MAJOR  57
+#define LIBAVUTIL_VERSION_MINOR   0
+#define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \
@@ -68,37 +93,30 @@
 #define LIBAVUTIL_IDENT         "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
 
 /**
- * @}
- *
- * @defgroup depr_guards Deprecation guards
+ * @defgroup lavu_depr_guards Deprecation Guards
  * FF_API_* defines may be placed below to indicate public API that will be
  * dropped at a future version bump. The defines themselves are not part of
  * the public API and may change, break or disappear at any time.
  *
+ * @note, when bumping the major version it is recommended to manually
+ * disable each FF_API_* in its own commit instead of disabling them all
+ * at once through the bump. This improves the git bisect-ability of the change.
+ *
  * @{
  */
 
-#ifndef FF_API_CRYPTO_CONTEXT
-#define FF_API_CRYPTO_CONTEXT           (LIBAVUTIL_VERSION_MAJOR < 57)
+#ifndef FF_API_D2STR
+#define FF_API_D2STR                    (LIBAVUTIL_VERSION_MAJOR < 58)
 #endif
-#ifndef FF_API_PLUS1_MINUS1
-#define FF_API_PLUS1_MINUS1             (LIBAVUTIL_VERSION_MAJOR < 57)
+#ifndef FF_API_DECLARE_ALIGNED
+#define FF_API_DECLARE_ALIGNED          (LIBAVUTIL_VERSION_MAJOR < 58)
 #endif
-#ifndef FF_API_ERROR_FRAME
-#define FF_API_ERROR_FRAME              (LIBAVUTIL_VERSION_MAJOR < 57)
-#endif
-#ifndef FF_API_VAAPI
-#define FF_API_VAAPI                    (LIBAVUTIL_VERSION_MAJOR < 57)
-#endif
-#ifndef FF_API_PKT_PTS
-#define FF_API_PKT_PTS                  (LIBAVUTIL_VERSION_MAJOR < 57)
-#endif
-#ifndef FF_API_CRYPTO_SIZE_T
-#define FF_API_CRYPTO_SIZE_T            (LIBAVUTIL_VERSION_MAJOR < 57)
+#ifndef FF_API_COLORSPACE_NAME
+#define FF_API_COLORSPACE_NAME          (LIBAVUTIL_VERSION_MAJOR < 58)
 #endif
 
-
 /**
+ * @}
  * @}
  */