| /* |
| * 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 */ |