2006-09-10 14:02:42 +00:00
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/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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*
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2006-10-07 15:30:46 +00:00
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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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2006-09-10 14:02:42 +00:00
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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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2006-10-07 15:30:46 +00:00
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* version 2.1 of the License, or (at your option) any later version.
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2006-09-10 14:02:42 +00:00
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*
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2006-10-07 15:30:46 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2006-09-10 14:02:42 +00:00
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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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2006-10-07 15:30:46 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-09-10 14:02:42 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2003-03-06 11:32:04 +00:00
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/**
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2010-04-20 14:45:34 +00:00
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* @file
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2008-03-10 18:42:09 +00:00
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* common internal and external API header
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2003-03-06 11:32:04 +00:00
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*/
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2008-08-31 07:39:47 +00:00
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#ifndef AVUTIL_COMMON_H
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#define AVUTIL_COMMON_H
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2001-07-22 14:18:56 +00:00
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2013-11-05 10:49:09 +00:00
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#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS) && !defined(UINT64_C)
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#error missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
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#endif
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2009-01-25 23:21:02 +00:00
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#include <errno.h>
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2006-12-07 20:06:11 +00:00
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#include <inttypes.h>
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2009-01-25 23:21:02 +00:00
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#include <limits.h>
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#include <math.h>
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2013-11-23 20:32:55 +00:00
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#include <stdint.h>
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2009-01-25 23:21:02 +00:00
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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2012-10-11 16:50:30 +00:00
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2010-03-08 21:28:56 +00:00
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#include "attributes.h"
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2015-12-10 20:49:30 +00:00
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#include "macros.h"
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2012-10-11 16:50:30 +00:00
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#include "version.h"
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2010-08-17 18:48:56 +00:00
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#include "libavutil/avconfig.h"
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2010-08-17 18:25:34 +00:00
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#if AV_HAVE_BIGENDIAN
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2010-08-23 15:31:50 +00:00
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# define AV_NE(be, le) (be)
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2010-08-17 18:25:34 +00:00
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#else
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2010-08-23 15:31:50 +00:00
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# define AV_NE(be, le) (le)
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2010-08-17 18:25:34 +00:00
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#endif
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2006-12-08 00:35:08 +00:00
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2009-01-28 00:16:05 +00:00
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//rounded division & shift
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2004-04-22 23:15:24 +00:00
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#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
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2002-04-27 12:30:26 +00:00
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/* assume b>0 */
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2019-10-02 02:30:45 +00:00
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#define ROUNDED_DIV(a,b) (((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
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2016-01-07 21:34:04 +00:00
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/* Fast a/(1<<b) rounded toward +inf. Assume a>=0 and b>=0 */
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2016-01-27 15:19:38 +00:00
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#define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
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2013-05-12 11:29:23 +00:00
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: ((a) + (1<<(b)) - 1) >> (b))
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2016-01-27 15:19:38 +00:00
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/* Backwards compat. */
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#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
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2011-05-09 15:47:22 +00:00
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#define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
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#define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
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2015-09-03 00:00:05 +00:00
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/**
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* Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they
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* are not representable as absolute values of their type. This is the same
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* as with *abs()
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2015-09-03 00:17:24 +00:00
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* @see FFNABS()
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2015-09-03 00:00:05 +00:00
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*/
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2006-10-11 23:17:58 +00:00
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#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
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2006-10-11 22:59:37 +00:00
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#define FFSIGN(a) ((a) > 0 ? 1 : -1)
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2002-11-01 20:37:10 +00:00
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2015-09-03 00:17:24 +00:00
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/**
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* Negative Absolute value.
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* this works for all integers of all types.
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* As with many macros, this evaluates its argument twice, it thus must not have
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* a sideeffect, that is FFNABS(x++) has undefined behavior.
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*/
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#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
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2015-10-30 18:21:15 +00:00
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/**
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* Comparator.
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* For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0
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* if x == y. This is useful for instance in a qsort comparator callback.
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* Furthermore, compilers are able to optimize this to branchless code, and
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* there is no risk of overflow with signed types.
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* As with many macros, this evaluates its argument multiple times, it thus
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* must not have a side-effect.
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*/
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#define FFDIFFSIGN(x,y) (((x)>(y)) - ((x)<(y)))
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2002-11-10 11:46:59 +00:00
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#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
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2008-04-19 17:07:58 +00:00
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#define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
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2002-11-10 11:46:59 +00:00
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#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
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2008-04-26 12:47:02 +00:00
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#define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
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2002-04-27 12:30:26 +00:00
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2006-11-01 21:28:36 +00:00
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#define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
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2008-10-15 07:24:54 +00:00
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#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
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2006-08-19 20:55:02 +00:00
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2001-07-22 14:18:56 +00:00
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/* misc math functions */
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2010-03-09 01:19:28 +00:00
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#ifdef HAVE_AV_CONFIG_H
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# include "config.h"
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# include "intmath.h"
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#endif
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2010-07-07 17:27:43 +00:00
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/* Pull in unguarded fallback defines at the end of this file. */
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#include "common.h"
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2001-07-22 14:18:56 +00:00
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2012-10-18 17:15:38 +00:00
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#ifndef av_log2
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av_const int av_log2(unsigned v);
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#endif
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#ifndef av_log2_16bit
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av_const int av_log2_16bit(unsigned v);
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#endif
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2006-05-01 00:27:24 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Clip a signed integer value into the amin-amax range.
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2006-05-01 00:27:24 +00:00
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* @param a value to clip
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* @param amin minimum value of the clip range
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* @param amax maximum value of the clip range
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2006-12-02 14:19:49 +00:00
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* @return clipped value
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2006-05-01 00:27:24 +00:00
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*/
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2011-02-16 18:20:54 +00:00
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static av_always_inline av_const int av_clip_c(int a, int amin, int amax)
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2002-04-19 03:25:20 +00:00
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{
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2013-01-05 10:19:54 +00:00
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#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
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2012-11-21 21:53:06 +00:00
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if (amin > amax) abort();
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#endif
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2008-02-15 14:58:18 +00:00
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if (a < amin) return amin;
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2006-07-09 10:56:39 +00:00
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else if (a > amax) return amax;
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else return a;
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2002-04-19 03:25:20 +00:00
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}
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2012-10-26 17:37:43 +00:00
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/**
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* Clip a signed 64bit integer value into the amin-amax range.
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* @param a value to clip
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* @param amin minimum value of the clip range
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* @param amax maximum value of the clip range
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* @return clipped value
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*/
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static av_always_inline av_const int64_t av_clip64_c(int64_t a, int64_t amin, int64_t amax)
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{
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2013-01-05 10:19:54 +00:00
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#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
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2012-11-21 21:53:06 +00:00
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if (amin > amax) abort();
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#endif
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2012-10-26 17:37:43 +00:00
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if (a < amin) return amin;
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else if (a > amax) return amax;
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else return a;
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}
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2006-05-01 00:27:24 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Clip a signed integer value into the 0-255 range.
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2006-05-01 00:27:24 +00:00
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* @param a value to clip
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2006-12-02 14:19:49 +00:00
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* @return clipped value
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2006-05-01 00:27:24 +00:00
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*/
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2011-02-16 18:20:54 +00:00
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static av_always_inline av_const uint8_t av_clip_uint8_c(int a)
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2004-03-20 00:18:52 +00:00
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{
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2018-02-14 02:54:13 +00:00
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if (a&(~0xFF)) return (~a)>>31;
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2010-04-26 21:01:38 +00:00
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else return a;
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2004-03-20 00:18:52 +00:00
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}
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2010-06-22 19:11:33 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Clip a signed integer value into the -128,127 range.
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2010-06-22 19:11:33 +00:00
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* @param a value to clip
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* @return clipped value
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*/
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2011-02-16 18:20:54 +00:00
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static av_always_inline av_const int8_t av_clip_int8_c(int a)
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2010-06-22 19:11:33 +00:00
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{
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2015-02-25 19:55:02 +00:00
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if ((a+0x80U) & ~0xFF) return (a>>31) ^ 0x7F;
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2010-06-22 19:11:33 +00:00
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else return a;
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}
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2009-08-13 18:47:13 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Clip a signed integer value into the 0-65535 range.
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2009-08-13 18:47:13 +00:00
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* @param a value to clip
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* @return clipped value
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*/
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2011-02-16 18:20:54 +00:00
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static av_always_inline av_const uint16_t av_clip_uint16_c(int a)
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2009-08-13 18:47:13 +00:00
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{
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2018-02-14 02:54:13 +00:00
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if (a&(~0xFFFF)) return (~a)>>31;
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2010-04-26 21:01:38 +00:00
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else return a;
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2009-08-13 18:47:13 +00:00
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}
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2007-08-11 21:59:01 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Clip a signed integer value into the -32768,32767 range.
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2007-08-11 21:59:01 +00:00
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* @param a value to clip
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* @return clipped value
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*/
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2011-02-16 18:20:54 +00:00
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static av_always_inline av_const int16_t av_clip_int16_c(int a)
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2007-08-11 21:59:01 +00:00
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{
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2015-02-25 19:55:02 +00:00
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if ((a+0x8000U) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
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2010-04-26 21:01:38 +00:00
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else return a;
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2007-08-11 21:59:01 +00:00
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}
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2010-04-21 17:57:48 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
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2010-04-21 17:57:48 +00:00
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* @param a value to clip
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* @return clipped value
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*/
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2011-02-16 18:20:54 +00:00
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static av_always_inline av_const int32_t av_clipl_int32_c(int64_t a)
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2010-04-21 17:57:48 +00:00
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{
|
2013-08-26 20:31:43 +00:00
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if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF)) return (int32_t)((a>>63) ^ 0x7FFFFFFF);
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2012-05-16 17:39:20 +00:00
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else return (int32_t)a;
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2010-04-21 17:57:48 +00:00
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}
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libavutil: Add av_clip_intp2
there already is a function, av_clip_uintp2() that clips a signed integer
to an unsigned power-of-two range, i.e. 0,2^p-1
this patch adds a function av_clip_intp2() that clips a signed integer
to a signed power-of-two range, i.e. -(2^p),(2^p-1)
the new function can be used as a special case for av_clip(), e.g.
av_clip(x, -8192, 8191) can be rewritten as av_clip_intp2(x, 13)
there are ARM instructions, usat and ssat resp., which map nicely to these
functions (see next patch)
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2015-02-20 00:35:33 +00:00
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/**
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* Clip a signed integer into the -(2^p),(2^p-1) range.
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* @param a value to clip
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* @param p bit position to clip at
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* @return clipped value
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*/
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static av_always_inline av_const int av_clip_intp2_c(int a, int p)
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{
|
2016-01-14 00:15:22 +00:00
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|
|
if (((unsigned)a + (1 << p)) & ~((2 << p) - 1))
|
libavutil: Add av_clip_intp2
there already is a function, av_clip_uintp2() that clips a signed integer
to an unsigned power-of-two range, i.e. 0,2^p-1
this patch adds a function av_clip_intp2() that clips a signed integer
to a signed power-of-two range, i.e. -(2^p),(2^p-1)
the new function can be used as a special case for av_clip(), e.g.
av_clip(x, -8192, 8191) can be rewritten as av_clip_intp2(x, 13)
there are ARM instructions, usat and ssat resp., which map nicely to these
functions (see next patch)
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2015-02-20 00:35:33 +00:00
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|
return (a >> 31) ^ ((1 << p) - 1);
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else
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return a;
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}
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|
|
2011-05-13 15:39:17 +00:00
|
|
|
/**
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|
|
|
* Clip a signed integer to an unsigned power of two range.
|
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|
* @param a value to clip
|
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* @param p bit position to clip at
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* @return clipped value
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|
*/
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|
static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
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|
|
{
|
2018-06-14 13:41:33 +00:00
|
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|
if (a & ~((1<<p) - 1)) return (~a) >> 31 & ((1<<p) - 1);
|
2011-05-13 15:39:17 +00:00
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|
else return a;
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|
}
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|
2015-03-18 18:08:45 +00:00
|
|
|
/**
|
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|
|
* Clear high bits from an unsigned integer starting with specific bit position
|
|
|
|
* @param a value to clip
|
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|
* @param p bit position to clip at
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|
* @return clipped value
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|
|
*/
|
|
|
|
static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
|
|
|
|
{
|
2019-09-18 03:26:07 +00:00
|
|
|
return a & ((1U << p) - 1);
|
2015-03-18 18:08:45 +00:00
|
|
|
}
|
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|
2012-08-11 00:15:19 +00:00
|
|
|
/**
|
|
|
|
* Add two signed 32-bit values with saturation.
|
|
|
|
*
|
|
|
|
* @param a one value
|
|
|
|
* @param b another value
|
|
|
|
* @return sum with signed saturation
|
|
|
|
*/
|
|
|
|
static av_always_inline int av_sat_add32_c(int a, int b)
|
|
|
|
{
|
|
|
|
return av_clipl_int32((int64_t)a + b);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Add a doubled value to another value with saturation at both stages.
|
|
|
|
*
|
|
|
|
* @param a first value
|
|
|
|
* @param b value doubled and added to a
|
2017-12-02 17:36:24 +00:00
|
|
|
* @return sum sat(a + sat(2*b)) with signed saturation
|
2012-08-11 00:15:19 +00:00
|
|
|
*/
|
|
|
|
static av_always_inline int av_sat_dadd32_c(int a, int b)
|
|
|
|
{
|
|
|
|
return av_sat_add32(a, av_sat_add32(b, b));
|
|
|
|
}
|
|
|
|
|
2017-12-02 17:36:24 +00:00
|
|
|
/**
|
|
|
|
* Subtract two signed 32-bit values with saturation.
|
|
|
|
*
|
|
|
|
* @param a one value
|
|
|
|
* @param b another value
|
|
|
|
* @return difference with signed saturation
|
|
|
|
*/
|
|
|
|
static av_always_inline int av_sat_sub32_c(int a, int b)
|
|
|
|
{
|
|
|
|
return av_clipl_int32((int64_t)a - b);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Subtract a doubled value from another value with saturation at both stages.
|
|
|
|
*
|
|
|
|
* @param a first value
|
|
|
|
* @param b value doubled and subtracted from a
|
|
|
|
* @return difference sat(a - sat(2*b)) with signed saturation
|
|
|
|
*/
|
|
|
|
static av_always_inline int av_sat_dsub32_c(int a, int b)
|
|
|
|
{
|
|
|
|
return av_sat_sub32(a, av_sat_add32(b, b));
|
|
|
|
}
|
|
|
|
|
2020-04-30 22:16:31 +00:00
|
|
|
/**
|
|
|
|
* Add two signed 64-bit values with saturation.
|
|
|
|
*
|
|
|
|
* @param a one value
|
|
|
|
* @param b another value
|
|
|
|
* @return sum with signed saturation
|
|
|
|
*/
|
|
|
|
static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b) {
|
2020-05-01 17:20:43 +00:00
|
|
|
#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_add_overflow)
|
|
|
|
int64_t tmp;
|
|
|
|
return !__builtin_add_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
|
|
|
|
#else
|
2020-10-19 08:20:26 +00:00
|
|
|
int64_t s = a+(uint64_t)b;
|
|
|
|
if ((int64_t)(a^b | ~s^b) >= 0)
|
|
|
|
return INT64_MAX ^ (b >> 63);
|
|
|
|
return s;
|
2020-05-01 17:20:43 +00:00
|
|
|
#endif
|
2020-04-30 22:16:31 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Subtract two signed 64-bit values with saturation.
|
|
|
|
*
|
|
|
|
* @param a one value
|
|
|
|
* @param b another value
|
|
|
|
* @return difference with signed saturation
|
|
|
|
*/
|
|
|
|
static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
|
2020-05-01 17:20:43 +00:00
|
|
|
#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_sub_overflow)
|
|
|
|
int64_t tmp;
|
|
|
|
return !__builtin_sub_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
|
|
|
|
#else
|
2020-04-30 22:16:31 +00:00
|
|
|
if (b <= 0 && a >= INT64_MAX + b)
|
|
|
|
return INT64_MAX;
|
|
|
|
if (b >= 0 && a <= INT64_MIN + b)
|
|
|
|
return INT64_MIN;
|
|
|
|
return a - b;
|
2020-05-01 17:20:43 +00:00
|
|
|
#endif
|
2020-04-30 22:16:31 +00:00
|
|
|
}
|
|
|
|
|
2008-07-13 19:59:44 +00:00
|
|
|
/**
|
2010-06-30 15:38:06 +00:00
|
|
|
* Clip a float value into the amin-amax range.
|
2008-07-13 19:59:44 +00:00
|
|
|
* @param a value to clip
|
|
|
|
* @param amin minimum value of the clip range
|
|
|
|
* @param amax maximum value of the clip range
|
|
|
|
* @return clipped value
|
|
|
|
*/
|
2011-02-16 18:20:54 +00:00
|
|
|
static av_always_inline av_const float av_clipf_c(float a, float amin, float amax)
|
2008-07-13 19:59:44 +00:00
|
|
|
{
|
2013-01-05 10:19:54 +00:00
|
|
|
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
|
2012-11-21 21:53:06 +00:00
|
|
|
if (amin > amax) abort();
|
|
|
|
#endif
|
2008-07-13 19:59:44 +00:00
|
|
|
if (a < amin) return amin;
|
|
|
|
else if (a > amax) return amax;
|
|
|
|
else return a;
|
|
|
|
}
|
|
|
|
|
2013-04-18 13:26:23 +00:00
|
|
|
/**
|
|
|
|
* Clip a double value into the amin-amax range.
|
|
|
|
* @param a value to clip
|
|
|
|
* @param amin minimum value of the clip range
|
|
|
|
* @param amax maximum value of the clip range
|
|
|
|
* @return clipped value
|
|
|
|
*/
|
|
|
|
static av_always_inline av_const double av_clipd_c(double a, double amin, double amax)
|
|
|
|
{
|
|
|
|
#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
|
|
|
|
if (amin > amax) abort();
|
|
|
|
#endif
|
|
|
|
if (a < amin) return amin;
|
|
|
|
else if (a > amax) return amax;
|
|
|
|
else return a;
|
|
|
|
}
|
|
|
|
|
2010-06-30 15:38:06 +00:00
|
|
|
/** Compute ceil(log2(x)).
|
2009-08-30 15:50:03 +00:00
|
|
|
* @param x value used to compute ceil(log2(x))
|
|
|
|
* @return computed ceiling of log2(x)
|
|
|
|
*/
|
2011-02-16 18:20:54 +00:00
|
|
|
static av_always_inline av_const int av_ceil_log2_c(int x)
|
2009-08-30 15:50:03 +00:00
|
|
|
{
|
2020-06-27 22:21:09 +00:00
|
|
|
return av_log2((x - 1U) << 1);
|
2009-08-30 15:50:03 +00:00
|
|
|
}
|
|
|
|
|
2010-09-14 14:45:43 +00:00
|
|
|
/**
|
|
|
|
* Count number of bits set to one in x
|
|
|
|
* @param x value to count bits of
|
|
|
|
* @return the number of bits set to one in x
|
|
|
|
*/
|
2011-02-16 18:20:54 +00:00
|
|
|
static av_always_inline av_const int av_popcount_c(uint32_t x)
|
2010-09-14 14:45:43 +00:00
|
|
|
{
|
|
|
|
x -= (x >> 1) & 0x55555555;
|
|
|
|
x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
|
|
|
|
x = (x + (x >> 4)) & 0x0F0F0F0F;
|
|
|
|
x += x >> 8;
|
|
|
|
return (x + (x >> 16)) & 0x3F;
|
|
|
|
}
|
|
|
|
|
2012-01-03 01:23:48 +00:00
|
|
|
/**
|
|
|
|
* Count number of bits set to one in x
|
|
|
|
* @param x value to count bits of
|
|
|
|
* @return the number of bits set to one in x
|
|
|
|
*/
|
|
|
|
static av_always_inline av_const int av_popcount64_c(uint64_t x)
|
|
|
|
{
|
2013-08-26 20:31:43 +00:00
|
|
|
return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
|
2012-01-03 01:23:48 +00:00
|
|
|
}
|
|
|
|
|
2016-01-07 22:59:03 +00:00
|
|
|
static av_always_inline av_const int av_parity_c(uint32_t v)
|
|
|
|
{
|
|
|
|
return av_popcount(v) & 1;
|
|
|
|
}
|
|
|
|
|
2011-11-24 23:15:59 +00:00
|
|
|
#define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
|
|
|
|
#define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
|
2003-03-16 21:03:20 +00:00
|
|
|
|
2010-06-30 20:09:48 +00:00
|
|
|
/**
|
|
|
|
* Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
|
|
|
|
*
|
|
|
|
* @param val Output value, must be an lvalue of type uint32_t.
|
|
|
|
* @param GET_BYTE Expression reading one byte from the input.
|
|
|
|
* Evaluated up to 7 times (4 for the currently
|
|
|
|
* assigned Unicode range). With a memory buffer
|
2020-01-29 22:56:07 +00:00
|
|
|
* input, this could be *ptr++, or if you want to make sure
|
|
|
|
* that *ptr stops at the end of a NULL terminated string then
|
|
|
|
* *ptr ? *ptr++ : 0
|
2010-06-30 20:09:48 +00:00
|
|
|
* @param ERROR Expression to be evaluated on invalid input,
|
|
|
|
* typically a goto statement.
|
2013-10-02 22:32:26 +00:00
|
|
|
*
|
|
|
|
* @warning ERROR should not contain a loop control statement which
|
|
|
|
* could interact with the internal while loop, and should force an
|
|
|
|
* exit from the macro code (e.g. through a goto or a return) in order
|
|
|
|
* to prevent undefined results.
|
2006-11-06 12:38:00 +00:00
|
|
|
*/
|
2006-07-07 22:43:32 +00:00
|
|
|
#define GET_UTF8(val, GET_BYTE, ERROR)\
|
2016-01-13 01:33:48 +00:00
|
|
|
val= (GET_BYTE);\
|
2006-07-07 22:43:32 +00:00
|
|
|
{\
|
2012-11-13 15:49:39 +00:00
|
|
|
uint32_t top = (val & 128) >> 1;\
|
2013-04-21 15:19:03 +00:00
|
|
|
if ((val & 0xc0) == 0x80 || val >= 0xFE)\
|
2020-01-29 22:42:21 +00:00
|
|
|
{ERROR}\
|
2012-11-13 15:49:39 +00:00
|
|
|
while (val & top) {\
|
2020-01-29 21:40:42 +00:00
|
|
|
unsigned int tmp = (GET_BYTE) - 128;\
|
2006-07-07 22:43:32 +00:00
|
|
|
if(tmp>>6)\
|
2020-01-29 22:42:21 +00:00
|
|
|
{ERROR}\
|
2006-07-07 22:43:32 +00:00
|
|
|
val= (val<<6) + tmp;\
|
2012-11-13 15:49:39 +00:00
|
|
|
top <<= 5;\
|
2006-07-07 22:43:32 +00:00
|
|
|
}\
|
2012-11-13 15:49:39 +00:00
|
|
|
val &= (top << 1) - 1;\
|
2006-07-07 22:43:32 +00:00
|
|
|
}
|
2002-09-29 22:44:22 +00:00
|
|
|
|
2010-06-30 20:09:48 +00:00
|
|
|
/**
|
|
|
|
* Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
|
|
|
|
*
|
|
|
|
* @param val Output value, must be an lvalue of type uint32_t.
|
|
|
|
* @param GET_16BIT Expression returning two bytes of UTF-16 data converted
|
|
|
|
* to native byte order. Evaluated one or two times.
|
|
|
|
* @param ERROR Expression to be evaluated on invalid input,
|
|
|
|
* typically a goto statement.
|
2009-09-23 18:22:00 +00:00
|
|
|
*/
|
|
|
|
#define GET_UTF16(val, GET_16BIT, ERROR)\
|
2020-01-29 21:41:50 +00:00
|
|
|
val = (GET_16BIT);\
|
2009-09-23 18:22:00 +00:00
|
|
|
{\
|
|
|
|
unsigned int hi = val - 0xD800;\
|
|
|
|
if (hi < 0x800) {\
|
2020-01-29 21:41:50 +00:00
|
|
|
val = (GET_16BIT) - 0xDC00;\
|
2009-09-23 18:22:00 +00:00
|
|
|
if (val > 0x3FFU || hi > 0x3FFU)\
|
2020-01-29 22:42:21 +00:00
|
|
|
{ERROR}\
|
2009-09-23 18:22:00 +00:00
|
|
|
val += (hi<<10) + 0x10000;\
|
|
|
|
}\
|
|
|
|
}\
|
|
|
|
|
2011-06-23 20:41:54 +00:00
|
|
|
/**
|
|
|
|
* @def PUT_UTF8(val, tmp, PUT_BYTE)
|
2010-06-30 15:38:06 +00:00
|
|
|
* Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
|
2011-06-23 20:41:54 +00:00
|
|
|
* @param val is an input-only argument and should be of type uint32_t. It holds
|
2009-01-28 00:16:05 +00:00
|
|
|
* a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
|
|
|
|
* val is given as a function it is executed only once.
|
2011-06-23 20:41:54 +00:00
|
|
|
* @param tmp is a temporary variable and should be of type uint8_t. It
|
2006-11-06 10:35:54 +00:00
|
|
|
* represents an intermediate value during conversion that is to be
|
2009-01-28 00:16:05 +00:00
|
|
|
* output by PUT_BYTE.
|
2011-06-23 20:41:54 +00:00
|
|
|
* @param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
|
2006-11-06 10:35:54 +00:00
|
|
|
* It could be a function or a statement, and uses tmp as the input byte.
|
|
|
|
* For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
|
2007-06-12 18:50:50 +00:00
|
|
|
* executed up to 4 times for values in the valid UTF-8 range and up to
|
2006-11-19 09:43:26 +00:00
|
|
|
* 7 times in the general case, depending on the length of the converted
|
2009-01-28 00:16:05 +00:00
|
|
|
* Unicode character.
|
2006-11-06 10:35:54 +00:00
|
|
|
*/
|
2006-11-06 10:32:48 +00:00
|
|
|
#define PUT_UTF8(val, tmp, PUT_BYTE)\
|
|
|
|
{\
|
|
|
|
int bytes, shift;\
|
|
|
|
uint32_t in = val;\
|
|
|
|
if (in < 0x80) {\
|
|
|
|
tmp = in;\
|
|
|
|
PUT_BYTE\
|
|
|
|
} else {\
|
|
|
|
bytes = (av_log2(in) + 4) / 5;\
|
|
|
|
shift = (bytes - 1) * 6;\
|
|
|
|
tmp = (256 - (256 >> bytes)) | (in >> shift);\
|
|
|
|
PUT_BYTE\
|
|
|
|
while (shift >= 6) {\
|
|
|
|
shift -= 6;\
|
|
|
|
tmp = 0x80 | ((in >> shift) & 0x3f);\
|
|
|
|
PUT_BYTE\
|
|
|
|
}\
|
|
|
|
}\
|
|
|
|
}
|
|
|
|
|
2011-06-23 20:41:54 +00:00
|
|
|
/**
|
|
|
|
* @def PUT_UTF16(val, tmp, PUT_16BIT)
|
2010-06-30 15:38:06 +00:00
|
|
|
* Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
|
2011-06-23 20:41:54 +00:00
|
|
|
* @param val is an input-only argument and should be of type uint32_t. It holds
|
2010-02-24 18:08:30 +00:00
|
|
|
* a UCS-4 encoded Unicode character that is to be converted to UTF-16. If
|
|
|
|
* val is given as a function it is executed only once.
|
2011-06-23 20:41:54 +00:00
|
|
|
* @param tmp is a temporary variable and should be of type uint16_t. It
|
2010-02-24 18:08:30 +00:00
|
|
|
* represents an intermediate value during conversion that is to be
|
|
|
|
* output by PUT_16BIT.
|
2011-06-23 20:41:54 +00:00
|
|
|
* @param PUT_16BIT writes the converted UTF-16 data to any proper destination
|
2010-02-24 18:08:30 +00:00
|
|
|
* in desired endianness. It could be a function or a statement, and uses tmp
|
|
|
|
* as the input byte. For example, PUT_BYTE could be "*output++ = tmp;"
|
|
|
|
* PUT_BYTE will be executed 1 or 2 times depending on input character.
|
|
|
|
*/
|
|
|
|
#define PUT_UTF16(val, tmp, PUT_16BIT)\
|
|
|
|
{\
|
|
|
|
uint32_t in = val;\
|
|
|
|
if (in < 0x10000) {\
|
|
|
|
tmp = in;\
|
|
|
|
PUT_16BIT\
|
|
|
|
} else {\
|
|
|
|
tmp = 0xD800 | ((in - 0x10000) >> 10);\
|
|
|
|
PUT_16BIT\
|
|
|
|
tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
|
|
|
|
PUT_16BIT\
|
|
|
|
}\
|
|
|
|
}\
|
|
|
|
|
|
|
|
|
|
|
|
|
2009-01-25 23:21:02 +00:00
|
|
|
#include "mem.h"
|
|
|
|
|
2009-01-25 14:00:21 +00:00
|
|
|
#ifdef HAVE_AV_CONFIG_H
|
|
|
|
# include "internal.h"
|
|
|
|
#endif /* HAVE_AV_CONFIG_H */
|
|
|
|
|
2008-08-31 07:39:47 +00:00
|
|
|
#endif /* AVUTIL_COMMON_H */
|
2010-07-07 17:27:43 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The following definitions are outside the multiple inclusion guard
|
|
|
|
* to ensure they are immediately available in intmath.h.
|
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*/
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2010-07-07 17:27:45 +00:00
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#ifndef av_ceil_log2
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# define av_ceil_log2 av_ceil_log2_c
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#endif
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#ifndef av_clip
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# define av_clip av_clip_c
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#endif
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2012-10-26 17:37:43 +00:00
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#ifndef av_clip64
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# define av_clip64 av_clip64_c
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#endif
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2010-07-07 17:27:45 +00:00
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#ifndef av_clip_uint8
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# define av_clip_uint8 av_clip_uint8_c
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#endif
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#ifndef av_clip_int8
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# define av_clip_int8 av_clip_int8_c
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#endif
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#ifndef av_clip_uint16
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# define av_clip_uint16 av_clip_uint16_c
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#endif
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#ifndef av_clip_int16
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# define av_clip_int16 av_clip_int16_c
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#endif
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#ifndef av_clipl_int32
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# define av_clipl_int32 av_clipl_int32_c
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#endif
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libavutil: Add av_clip_intp2
there already is a function, av_clip_uintp2() that clips a signed integer
to an unsigned power-of-two range, i.e. 0,2^p-1
this patch adds a function av_clip_intp2() that clips a signed integer
to a signed power-of-two range, i.e. -(2^p),(2^p-1)
the new function can be used as a special case for av_clip(), e.g.
av_clip(x, -8192, 8191) can be rewritten as av_clip_intp2(x, 13)
there are ARM instructions, usat and ssat resp., which map nicely to these
functions (see next patch)
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2015-02-20 00:35:33 +00:00
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#ifndef av_clip_intp2
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# define av_clip_intp2 av_clip_intp2_c
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#endif
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2011-05-13 15:39:17 +00:00
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#ifndef av_clip_uintp2
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# define av_clip_uintp2 av_clip_uintp2_c
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#endif
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2015-03-18 18:08:45 +00:00
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#ifndef av_mod_uintp2
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# define av_mod_uintp2 av_mod_uintp2_c
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#endif
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2012-08-11 00:15:19 +00:00
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#ifndef av_sat_add32
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# define av_sat_add32 av_sat_add32_c
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#endif
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#ifndef av_sat_dadd32
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# define av_sat_dadd32 av_sat_dadd32_c
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#endif
|
2017-12-02 17:36:24 +00:00
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#ifndef av_sat_sub32
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# define av_sat_sub32 av_sat_sub32_c
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#endif
|
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#ifndef av_sat_dsub32
|
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# define av_sat_dsub32 av_sat_dsub32_c
|
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|
|
#endif
|
2020-04-30 22:16:31 +00:00
|
|
|
#ifndef av_sat_add64
|
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|
|
# define av_sat_add64 av_sat_add64_c
|
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|
#endif
|
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#ifndef av_sat_sub64
|
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|
|
# define av_sat_sub64 av_sat_sub64_c
|
|
|
|
#endif
|
2010-07-07 17:27:45 +00:00
|
|
|
#ifndef av_clipf
|
|
|
|
# define av_clipf av_clipf_c
|
|
|
|
#endif
|
2013-04-18 13:26:23 +00:00
|
|
|
#ifndef av_clipd
|
|
|
|
# define av_clipd av_clipd_c
|
|
|
|
#endif
|
2010-09-14 14:45:43 +00:00
|
|
|
#ifndef av_popcount
|
|
|
|
# define av_popcount av_popcount_c
|
|
|
|
#endif
|
2012-01-03 01:23:48 +00:00
|
|
|
#ifndef av_popcount64
|
|
|
|
# define av_popcount64 av_popcount64_c
|
|
|
|
#endif
|
2016-01-07 22:59:03 +00:00
|
|
|
#ifndef av_parity
|
|
|
|
# define av_parity av_parity_c
|
|
|
|
#endif
|