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56 lines
1.5 KiB
56 lines
1.5 KiB
/* |
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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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