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686959e87e
* qatar/master: doxygen: Consistently use '@' instead of '\' for Doxygen markup. Use av_printf_format to check the usage of printf style functions Add av_printf_format, for marking printf style format strings and their parameters ARM: enable thumb for Cortex-M* CPUs nsvdec: Propagate error values instead of returning 0 in nsv_read_header(). build: remove SRC_PATH_BARE variable build: move basic rules and variables to main Makefile build: move special targets to end of main Makefile lavdev: improve feedback in case of invalid frame rate/size vfwcap: prefer "framerate_q" over "fps" in vfw_read_header() v4l2: prefer "framerate_q" over "fps" in v4l2_set_parameters() fbdev: prefer "framerate_q" over "fps" in device context bktr: prefer "framerate" over "fps" for grab_read_header() ALSA: implement channel layout for playback. alsa: support unsigned variants of already supported signed formats. alsa: add support for more formats. ARM: allow building in Thumb2 mode Conflicts: common.mak doc/APIchanges libavcodec/vdpau.h libavdevice/alsa-audio-common.c libavdevice/fbdev.c libavdevice/libdc1394.c libavutil/avutil.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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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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* Macro definitions for various function/variable attributes
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*/
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#ifndef AVUTIL_ATTRIBUTES_H
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#define AVUTIL_ATTRIBUTES_H
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#ifdef __GNUC__
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# define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y)
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#else
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# define AV_GCC_VERSION_AT_LEAST(x,y) 0
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#endif
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#ifndef av_always_inline
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#if AV_GCC_VERSION_AT_LEAST(3,1)
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# define av_always_inline __attribute__((always_inline)) inline
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#else
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# define av_always_inline inline
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#endif
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#endif
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#ifndef av_noinline
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#if AV_GCC_VERSION_AT_LEAST(3,1)
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# define av_noinline __attribute__((noinline))
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#else
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# define av_noinline
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#endif
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#endif
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#ifndef av_pure
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#if AV_GCC_VERSION_AT_LEAST(3,1)
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# define av_pure __attribute__((pure))
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#else
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# define av_pure
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#endif
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#endif
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#ifndef av_const
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#if AV_GCC_VERSION_AT_LEAST(2,6)
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# define av_const __attribute__((const))
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#else
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# define av_const
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#endif
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#endif
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#ifndef av_cold
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#if AV_GCC_VERSION_AT_LEAST(4,3)
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# define av_cold __attribute__((cold))
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#else
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# define av_cold
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#endif
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#endif
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#ifndef av_flatten
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#if AV_GCC_VERSION_AT_LEAST(4,1)
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# define av_flatten __attribute__((flatten))
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#else
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# define av_flatten
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#endif
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#endif
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#ifndef attribute_deprecated
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#if AV_GCC_VERSION_AT_LEAST(3,1)
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# define attribute_deprecated __attribute__((deprecated))
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#else
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# define attribute_deprecated
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#endif
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#endif
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#ifndef av_unused
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#if defined(__GNUC__)
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# define av_unused __attribute__((unused))
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#else
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# define av_unused
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#endif
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#endif
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/**
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* Mark a variable as used and prevent the compiler from optimizing it
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* away. This is useful for variables accessed only from inline
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* assembler without the compiler being aware.
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*/
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#ifndef av_used
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#if AV_GCC_VERSION_AT_LEAST(3,1)
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# define av_used __attribute__((used))
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#else
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# define av_used
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#endif
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#endif
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#ifndef av_alias
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#if AV_GCC_VERSION_AT_LEAST(3,3)
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# define av_alias __attribute__((may_alias))
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#else
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# define av_alias
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#endif
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#endif
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#ifndef av_uninit
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#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
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# define av_uninit(x) x=x
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#else
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# define av_uninit(x) x
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#endif
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#endif
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#ifdef __GNUC__
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# define av_builtin_constant_p __builtin_constant_p
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# define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos)))
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#else
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# define av_builtin_constant_p(x) 0
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# define av_printf_format(fmtpos, attrpos)
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#endif
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#endif /* AVUTIL_ATTRIBUTES_H */
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