1/* 2 * Copyright (C) 2016 foo86 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVCODEC_DCAMATH_H 22#define AVCODEC_DCAMATH_H 23 24#include "libavutil/common.h" 25#include "libavutil/intmath.h" 26 27static inline int32_t norm__(int64_t a, int bits) 28{ 29 if (bits > 0) 30 return (int32_t)((a + (INT64_C(1) << (bits - 1))) >> bits); 31 else 32 return (int32_t)a; 33} 34 35static inline int32_t mul__(int32_t a, int32_t b, int bits) 36{ 37 return norm__((int64_t)a * b, bits); 38} 39 40static inline int32_t norm13(int64_t a) { return norm__(a, 13); } 41static inline int32_t norm16(int64_t a) { return norm__(a, 16); } 42static inline int32_t norm20(int64_t a) { return norm__(a, 20); } 43static inline int32_t norm21(int64_t a) { return norm__(a, 21); } 44static inline int32_t norm23(int64_t a) { return norm__(a, 23); } 45 46static inline int32_t mul15(int32_t a, int32_t b) { return mul__(a, b, 15); } 47static inline int32_t mul16(int32_t a, int32_t b) { return mul__(a, b, 16); } 48static inline int32_t mul17(int32_t a, int32_t b) { return mul__(a, b, 17); } 49static inline int32_t mul22(int32_t a, int32_t b) { return mul__(a, b, 22); } 50static inline int32_t mul23(int32_t a, int32_t b) { return mul__(a, b, 23); } 51static inline int32_t mul31(int32_t a, int32_t b) { return mul__(a, b, 31); } 52static inline int32_t mul32(int32_t a, int32_t b) { return mul__(a, b, 32); } 53 54static inline int32_t clip23(int32_t a) { return av_clip_intp2(a, 23); } 55 56#endif 57