mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
131 lines
2.9 KiB
131 lines
2.9 KiB
/* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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, |
|
* 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 |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
/** |
|
* @file |
|
* Replacements for frequently missing libm functions |
|
*/ |
|
|
|
#ifndef AVUTIL_LIBM_H |
|
#define AVUTIL_LIBM_H |
|
|
|
#include <math.h> |
|
#include "config.h" |
|
#include "attributes.h" |
|
#include "intfloat.h" |
|
|
|
#if !HAVE_CBRTF |
|
static av_always_inline float cbrtf(float x) |
|
{ |
|
return x < 0 ? -powf(-x, 1.0 / 3.0) : powf(x, 1.0 / 3.0); |
|
} |
|
#endif |
|
|
|
#if !HAVE_EXP2 |
|
#undef exp2 |
|
#define exp2(x) exp((x) * 0.693147180559945) |
|
#endif /* HAVE_EXP2 */ |
|
|
|
#if !HAVE_EXP2F |
|
#undef exp2f |
|
#define exp2f(x) ((float)exp2(x)) |
|
#endif /* HAVE_EXP2F */ |
|
|
|
#if !HAVE_ISINF |
|
static av_always_inline av_const int isinf(float x) |
|
{ |
|
uint32_t v = av_float2int(x); |
|
if ((v & 0x7f800000) != 0x7f800000) |
|
return 0; |
|
return !(v & 0x007fffff); |
|
} |
|
#endif /* HAVE_ISINF */ |
|
|
|
#if !HAVE_ISNAN |
|
static av_always_inline av_const int isnan(float x) |
|
{ |
|
uint32_t v = av_float2int(x); |
|
if ((v & 0x7f800000) != 0x7f800000) |
|
return 0; |
|
return v & 0x007fffff; |
|
} |
|
#endif /* HAVE_ISNAN */ |
|
|
|
#if !HAVE_LLRINT |
|
#undef llrint |
|
#define llrint(x) ((long long)rint(x)) |
|
#endif /* HAVE_LLRINT */ |
|
|
|
#if !HAVE_LLRINTF |
|
#undef llrintf |
|
#define llrintf(x) ((long long)rint(x)) |
|
#endif /* HAVE_LLRINT */ |
|
|
|
#if !HAVE_LOG2 |
|
#undef log2 |
|
#define log2(x) (log(x) * 1.44269504088896340736) |
|
#endif /* HAVE_LOG2 */ |
|
|
|
#if !HAVE_LOG2F |
|
#undef log2f |
|
#define log2f(x) ((float)log2(x)) |
|
#endif /* HAVE_LOG2F */ |
|
|
|
#if !HAVE_LRINT |
|
static av_always_inline av_const long int lrint(double x) |
|
{ |
|
return rint(x); |
|
} |
|
#endif /* HAVE_LRINT */ |
|
|
|
#if !HAVE_LRINTF |
|
static av_always_inline av_const long int lrintf(float x) |
|
{ |
|
return (int)(rint(x)); |
|
} |
|
#endif /* HAVE_LRINTF */ |
|
|
|
#if !HAVE_ROUND |
|
static av_always_inline av_const double round(double x) |
|
{ |
|
return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
|
} |
|
#endif /* HAVE_ROUND */ |
|
|
|
#if !HAVE_ROUNDF |
|
static av_always_inline av_const float roundf(float x) |
|
{ |
|
return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
|
} |
|
#endif /* HAVE_ROUNDF */ |
|
|
|
#if !HAVE_TRUNC |
|
static av_always_inline av_const double trunc(double x) |
|
{ |
|
return (x > 0) ? floor(x) : ceil(x); |
|
} |
|
#endif /* HAVE_TRUNC */ |
|
|
|
#if !HAVE_TRUNCF |
|
static av_always_inline av_const float truncf(float x) |
|
{ |
|
return (x > 0) ? floor(x) : ceil(x); |
|
} |
|
#endif /* HAVE_TRUNCF */ |
|
|
|
#endif /* AVUTIL_LIBM_H */
|
|
|