intops.h (2658B)
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 35 static inline int imax(const int a, const int b) { 36 return a > b ? a : b; 37 } 38 39 static inline int imin(const int a, const int b) { 40 return a < b ? a : b; 41 } 42 43 static inline unsigned umax(const unsigned a, const unsigned b) { 44 return a > b ? a : b; 45 } 46 47 static inline unsigned umin(const unsigned a, const unsigned b) { 48 return a < b ? a : b; 49 } 50 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 55 static inline int iclip_u8(const int v) { 56 return iclip(v, 0, 255); 57 } 58 59 static inline int apply_sign(const int v, const int s) { 60 return s < 0 ? -v : v; 61 } 62 63 static inline int apply_sign64(const int v, const int64_t s) { 64 return s < 0 ? -v : v; 65 } 66 67 static inline int ulog2(const unsigned v) { 68 return 31 ^ clz(v); 69 } 70 71 static inline int u64log2(const uint64_t v) { 72 return 63 ^ clzll(v); 73 } 74 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 */