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/*
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* copyright (c) 2003 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* @ingroup lavu
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* Libavutil version macros
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*/
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#ifndef AVUTIL_VERSION_H
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#define AVUTIL_VERSION_H
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#include "macros.h"
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/**
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* @addtogroup version_utils
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*
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* Useful to check and match library version in order to maintain
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* backward compatibility.
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*
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* The FFmpeg libraries follow a versioning sheme very similar to
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* Semantic Versioning (http://semver.org/)
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* The difference is that the component called PATCH is called MICRO in FFmpeg
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* and its value is reset to 100 instead of 0 to keep it above or equal to 100.
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* Also we do not increase MICRO for every bugfix or change in git master.
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*
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* Prior to FFmpeg 3.2 point releases did not change any lib version number to
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* avoid aliassing different git master checkouts.
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* Starting with FFmpeg 3.2, the released library versions will occupy
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* a separate MAJOR.MINOR that is not used on the master development branch.
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* That is if we branch a release of master 55.10.123 we will bump to 55.11.100
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* for the release and master will continue at 55.12.100 after it. Each new
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* point release will then bump the MICRO improving the usefulness of the lib
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* versions.
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*
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* @{
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*/
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#define AV_VERSION_INT(a, b, c) ((a)<<16 | (b)<<8 | (c))
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#define AV_VERSION_DOT(a, b, c) a ##.## b ##.## c
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#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
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/**
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* Extract version components from the full ::AV_VERSION_INT int as returned
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* by functions like ::avformat_version() and ::avcodec_version()
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*/
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#define AV_VERSION_MAJOR(a) ((a) >> 16)
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#define AV_VERSION_MINOR(a) (((a) & 0x00FF00) >> 8)
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#define AV_VERSION_MICRO(a) ((a) & 0xFF)
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/**
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* @}
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*/
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/**
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* @defgroup lavu_ver Version and Build diagnostics
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*
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* Macros and function useful to check at compiletime and at runtime
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* which version of libavutil is in use.
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*
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* @{
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*/
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#define LIBAVUTIL_VERSION_MAJOR 56
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#define LIBAVUTIL_VERSION_MINOR 58
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#define LIBAVUTIL_VERSION_MICRO 100
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#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
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LIBAVUTIL_VERSION_MINOR, \
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LIBAVUTIL_VERSION_MICRO)
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#define LIBAVUTIL_VERSION AV_VERSION(LIBAVUTIL_VERSION_MAJOR, \
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LIBAVUTIL_VERSION_MINOR, \
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LIBAVUTIL_VERSION_MICRO)
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#define LIBAVUTIL_BUILD LIBAVUTIL_VERSION_INT
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#define LIBAVUTIL_IDENT "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
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/**
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* @defgroup lavu_depr_guards Deprecation Guards
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* FF_API_* defines may be placed below to indicate public API that will be
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* dropped at a future version bump. The defines themselves are not part of
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* the public API and may change, break or disappear at any time.
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*
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* @note, when bumping the major version it is recommended to manually
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* disable each FF_API_* in its own commit instead of disabling them all
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* at once through the bump. This improves the git bisect-ability of the change.
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*
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* @{
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*/
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#ifndef FF_API_VAAPI
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#define FF_API_VAAPI (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_FRAME_QP
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#define FF_API_FRAME_QP (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_PLUS1_MINUS1
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#define FF_API_PLUS1_MINUS1 (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_ERROR_FRAME
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#define FF_API_ERROR_FRAME (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_PKT_PTS
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#define FF_API_PKT_PTS (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_CRYPTO_SIZE_T
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#define FF_API_CRYPTO_SIZE_T (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_FRAME_GET_SET
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#define FF_API_FRAME_GET_SET (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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avutil/pixdesc: deprecate AV_PIX_FMT_FLAG_PSEUDOPAL
PSEUDOPAL pixel formats are not paletted, but carried a palette with the
intention of allowing code to treat unpaletted formats as paletted. The
palette simply mapped the byte values to the resulting RGB values,
making it some sort of LUT for RGB conversion.
It was used for 1 byte formats only: RGB4_BYTE, BGR4_BYTE, RGB8, BGR8,
GRAY8. The first 4 are awfully obscure, used only by some ancient bitmap
formats. The last one, GRAY8, is more common, but its treatment is
grossly incorrect. It considers full range GRAY8 only, so GRAY8 coming
from typical Y video planes was not mapped to the correct RGB values.
This cannot be fixed, because AVFrame.color_range can be freely changed
at runtime, and there is nothing to ensure the pseudo palette is
updated.
Also, nothing actually used the PSEUDOPAL palette data, except xwdenc
(trivially changed in the previous commit). All other code had to treat
it as a special case, just to ignore or to propagate palette data.
In conclusion, this was just a very strange old mechnaism that has no
real justification to exist anymore (although it may have been nice and
useful in the past). Now it's an artifact that makes the API harder to
use: API users who allocate their own pixel data have to be aware that
they need to allocate the palette, or FFmpeg will crash on them in
_some_ situations. On top of this, there was no API to allocate the
pseuo palette outside of av_frame_get_buffer().
This patch not only deprecates AV_PIX_FMT_FLAG_PSEUDOPAL, but also makes
the pseudo palette optional. Nothing accesses it anymore, though if it's
set, it's propagated. It's still allocated and initialized for
compatibility with API users that rely on this feature. But new API
users do not need to allocate it. This was an explicit goal of this
patch.
Most changes replace AV_PIX_FMT_FLAG_PSEUDOPAL with FF_PSEUDOPAL. I
first tried #ifdefing all code, but it was a mess. The FF_PSEUDOPAL
macro reduces the mess, and still allows defining FF_API_PSEUDOPAL to 0.
Passes FATE with FF_API_PSEUDOPAL enabled and disabled. In addition,
FATE passes with FF_API_PSEUDOPAL set to 1, but with allocation
functions manually changed to not allocating a palette.
7 years ago
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#ifndef FF_API_PSEUDOPAL
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#define FF_API_PSEUDOPAL (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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#ifndef FF_API_CHILD_CLASS_NEXT
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#define FF_API_CHILD_CLASS_NEXT (LIBAVUTIL_VERSION_MAJOR < 57)
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#endif
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/**
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* @}
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* @}
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*/
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#endif /* AVUTIL_VERSION_H */
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