mirror of https://git.videolan.org/git/ffmpeg.git
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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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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#ifndef AVUTIL_HALF2FLOAT_H
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#define AVUTIL_HALF2FLOAT_H
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#include <stdint.h>
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#include "intfloat.h"
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#include "config.h"
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typedef struct Half2FloatTables {
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#if HAVE_FAST_FLOAT16
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uint8_t dummy;
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#else
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uint32_t mantissatable[3072];
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uint32_t exponenttable[64];
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uint16_t offsettable[64];
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#endif
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} Half2FloatTables;
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void ff_init_half2float_tables(Half2FloatTables *t);
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static inline uint32_t half2float(uint16_t h, const Half2FloatTables *t)
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{
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#if HAVE_FAST_FLOAT16
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union {
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_Float16 f;
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uint16_t i;
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} u;
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u.i = h;
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return av_float2int(u.f);
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#else
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uint32_t f;
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f = t->mantissatable[t->offsettable[h >> 10] + (h & 0x3ff)] + t->exponenttable[h >> 10];
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return f;
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#endif
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}
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#endif /* AVUTIL_HALF2FLOAT_H */
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