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
norm__(int64_t a,int bits)27 static 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
mul__(int32_t a,int32_t b,int bits)35 static inline int32_t mul__(int32_t a, int32_t b, int bits)
36 {
37 return norm__((int64_t)a * b, bits);
38 }
39
norm13(int64_t a)40 static inline int32_t norm13(int64_t a) { return norm__(a, 13); }
norm16(int64_t a)41 static inline int32_t norm16(int64_t a) { return norm__(a, 16); }
norm20(int64_t a)42 static inline int32_t norm20(int64_t a) { return norm__(a, 20); }
norm21(int64_t a)43 static inline int32_t norm21(int64_t a) { return norm__(a, 21); }
norm23(int64_t a)44 static inline int32_t norm23(int64_t a) { return norm__(a, 23); }
45
mul15(int32_t a,int32_t b)46 static inline int32_t mul15(int32_t a, int32_t b) { return mul__(a, b, 15); }
mul16(int32_t a,int32_t b)47 static inline int32_t mul16(int32_t a, int32_t b) { return mul__(a, b, 16); }
mul17(int32_t a,int32_t b)48 static inline int32_t mul17(int32_t a, int32_t b) { return mul__(a, b, 17); }
mul22(int32_t a,int32_t b)49 static inline int32_t mul22(int32_t a, int32_t b) { return mul__(a, b, 22); }
mul23(int32_t a,int32_t b)50 static inline int32_t mul23(int32_t a, int32_t b) { return mul__(a, b, 23); }
mul31(int32_t a,int32_t b)51 static inline int32_t mul31(int32_t a, int32_t b) { return mul__(a, b, 31); }
mul32(int32_t a,int32_t b)52 static inline int32_t mul32(int32_t a, int32_t b) { return mul__(a, b, 32); }
53
clip23(int32_t a)54 static inline int32_t clip23(int32_t a) { return av_clip_intp2(a, 23); }
55
56 #endif
57