1 /*
2 * Copyright © 2018, VideoLAN and dav1d authors
3 * Copyright © 2018, Two Orioles, LLC
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this
10 * list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifndef DAV1D_COMMON_INTOPS_H
29 #define DAV1D_COMMON_INTOPS_H
30
31 #include <stdint.h>
32
33 #include "common/attributes.h"
34
imax(const int a,const int b)35 static inline int imax(const int a, const int b) {
36 return a > b ? a : b;
37 }
38
imin(const int a,const int b)39 static inline int imin(const int a, const int b) {
40 return a < b ? a : b;
41 }
42
umax(const unsigned a,const unsigned b)43 static inline unsigned umax(const unsigned a, const unsigned b) {
44 return a > b ? a : b;
45 }
46
umin(const unsigned a,const unsigned b)47 static inline unsigned umin(const unsigned a, const unsigned b) {
48 return a < b ? a : b;
49 }
50
iclip(const int v,const int min,const int max)51 static inline int iclip(const int v, const int min, const int max) {
52 return v < min ? min : v > max ? max : v;
53 }
54
iclip_u8(const int v)55 static inline int iclip_u8(const int v) {
56 return iclip(v, 0, 255);
57 }
58
apply_sign(const int v,const int s)59 static inline int apply_sign(const int v, const int s) {
60 return s < 0 ? -v : v;
61 }
62
apply_sign64(const int v,const int64_t s)63 static inline int apply_sign64(const int v, const int64_t s) {
64 return s < 0 ? -v : v;
65 }
66
ulog2(const unsigned v)67 static inline int ulog2(const unsigned v) {
68 return 31 ^ clz(v);
69 }
70
u64log2(const uint64_t v)71 static inline int u64log2(const uint64_t v) {
72 return 63 ^ clzll(v);
73 }
74
inv_recenter(const unsigned r,const unsigned v)75 static inline unsigned inv_recenter(const unsigned r, const unsigned v) {
76 if (v > (r << 1))
77 return v;
78 else if ((v & 1) == 0)
79 return (v >> 1) + r;
80 else
81 return r - ((v + 1) >> 1);
82 }
83
84 #endif /* DAV1D_COMMON_INTOPS_H */
85