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/*
* 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_FLOAT2HALF_H
#define AVUTIL_FLOAT2HALF_H
#include <stdint.h>
#include "intfloat.h"
#include "config.h"
typedef struct Float2HalfTables {
#if HAVE_FAST_FLOAT16
uint8_t dummy;
#else
uint16_t basetable[512];
uint8_t shifttable[512];
#endif
} Float2HalfTables;
void ff_init_float2half_tables(Float2HalfTables *t);
static inline uint16_t float2half(uint32_t f, const Float2HalfTables *t)
{
#if HAVE_FAST_FLOAT16
union {
_Float16 f;
uint16_t i;
} u;
u.f = av_int2float(f);
return u.i;
#else
uint16_t h;
h = t->basetable[(f >> 23) & 0x1ff] + ((f & 0x007fffff) >> t->shifttable[(f >> 23) & 0x1ff]);
return h;
#endif
}
#endif /* AVUTIL_FLOAT2HALF_H */
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