mirror of https://git.videolan.org/git/ffmpeg.git
57 lines
1.5 KiB
C
57 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_FLOAT2HALF_H
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#define AVUTIL_FLOAT2HALF_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 Float2HalfTables {
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#if HAVE_FAST_FLOAT16
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uint8_t dummy;
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#else
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uint16_t basetable[512];
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uint8_t shifttable[512];
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#endif
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} Float2HalfTables;
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void ff_init_float2half_tables(Float2HalfTables *t);
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static inline uint16_t float2half(uint32_t f, const Float2HalfTables *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.f = av_int2float(f);
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return u.i;
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#else
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uint16_t h;
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h = t->basetable[(f >> 23) & 0x1ff] + ((f & 0x007fffff) >> t->shifttable[(f >> 23) & 0x1ff]);
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return h;
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#endif
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}
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#endif /* AVUTIL_FLOAT2HALF_H */
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