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.
57 lines
1.5 KiB
57 lines
1.5 KiB
/* |
|
* 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. |
|
* |
|
* 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 FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#ifndef AVUTIL_HALF2FLOAT_H |
|
#define AVUTIL_HALF2FLOAT_H |
|
|
|
#include <stdint.h> |
|
#include "intfloat.h" |
|
|
|
#include "config.h" |
|
|
|
typedef struct Half2FloatTables { |
|
#if HAVE_FAST_FLOAT16 |
|
uint8_t dummy; |
|
#else |
|
uint32_t mantissatable[3072]; |
|
uint32_t exponenttable[64]; |
|
uint16_t offsettable[64]; |
|
#endif |
|
} Half2FloatTables; |
|
|
|
void ff_init_half2float_tables(Half2FloatTables *t); |
|
|
|
static inline uint32_t half2float(uint16_t h, const Half2FloatTables *t) |
|
{ |
|
#if HAVE_FAST_FLOAT16 |
|
union { |
|
_Float16 f; |
|
uint16_t i; |
|
} u; |
|
u.i = h; |
|
return av_float2int(u.f); |
|
#else |
|
uint32_t f; |
|
|
|
f = t->mantissatable[t->offsettable[h >> 10] + (h & 0x3ff)] + t->exponenttable[h >> 10]; |
|
|
|
return f; |
|
#endif |
|
} |
|
|
|
#endif /* AVUTIL_HALF2FLOAT_H */
|
|
|