| /* |
| * Copyright (C) 2016 foo86 |
| * |
| * 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 AVCODEC_DCAMATH_H |
| #define AVCODEC_DCAMATH_H |
| |
| #include "libavutil/common.h" |
| #include "libavutil/intmath.h" |
| |
| static inline int32_t norm__(int64_t a, int bits) |
| { |
| if (bits > 0) |
| return (int32_t)((a + (INT64_C(1) << (bits - 1))) >> bits); |
| else |
| return (int32_t)a; |
| } |
| |
| static inline int32_t mul__(int32_t a, int32_t b, int bits) |
| { |
| return norm__((int64_t)a * b, bits); |
| } |
| |
| static inline int32_t norm13(int64_t a) { return norm__(a, 13); } |
| static inline int32_t norm16(int64_t a) { return norm__(a, 16); } |
| static inline int32_t norm20(int64_t a) { return norm__(a, 20); } |
| static inline int32_t norm21(int64_t a) { return norm__(a, 21); } |
| static inline int32_t norm23(int64_t a) { return norm__(a, 23); } |
| |
| static inline int32_t mul15(int32_t a, int32_t b) { return mul__(a, b, 15); } |
| static inline int32_t mul16(int32_t a, int32_t b) { return mul__(a, b, 16); } |
| static inline int32_t mul17(int32_t a, int32_t b) { return mul__(a, b, 17); } |
| static inline int32_t mul22(int32_t a, int32_t b) { return mul__(a, b, 22); } |
| static inline int32_t mul23(int32_t a, int32_t b) { return mul__(a, b, 23); } |
| static inline int32_t mul31(int32_t a, int32_t b) { return mul__(a, b, 31); } |
| |
| static inline int32_t clip23(int32_t a) { return av_clip_intp2(a, 23); } |
| |
| #endif |
