1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef VP9_COMMON_VP9_COMMON_H_ 12 #define VP9_COMMON_VP9_COMMON_H_ 13 14 /* Interface header for common constant data structures and lookup tables */ 15 16 #include <assert.h> 17 18 #include "./vpx_config.h" 19 #include "vpx_mem/vpx_mem.h" 20 #include "vpx/vpx_integer.h" 21 22 #define MIN(x, y) (((x) < (y)) ? (x) : (y)) 23 #define MAX(x, y) (((x) > (y)) ? (x) : (y)) 24 25 #define ROUND_POWER_OF_TWO(value, n) \ 26 (((value) + (1 << ((n) - 1))) >> (n)) 27 28 #define ALIGN_POWER_OF_TWO(value, n) \ 29 (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) 30 31 // Only need this for fixed-size arrays, for structs just assign. 32 #define vp9_copy(dest, src) { \ 33 assert(sizeof(dest) == sizeof(src)); \ 34 vpx_memcpy(dest, src, sizeof(src)); \ 35 } 36 37 // Use this for variably-sized arrays. 38 #define vp9_copy_array(dest, src, n) { \ 39 assert(sizeof(*dest) == sizeof(*src)); \ 40 vpx_memcpy(dest, src, n * sizeof(*src)); \ 41 } 42 43 #define vp9_zero(dest) vpx_memset(&dest, 0, sizeof(dest)); 44 #define vp9_zero_array(dest, n) vpx_memset(dest, 0, n * sizeof(*dest)); 45 46 static INLINE uint8_t clip_pixel(int val) { 47 return (val > 255) ? 255u : (val < 0) ? 0u : val; 48 } 49 50 static INLINE int clamp(int value, int low, int high) { 51 return value < low ? low : (value > high ? high : value); 52 } 53 54 static INLINE double fclamp(double value, double low, double high) { 55 return value < low ? low : (value > high ? high : value); 56 } 57 58 static int get_unsigned_bits(unsigned int num_values) { 59 int cat = 0; 60 if (num_values <= 1) 61 return 0; 62 num_values--; 63 while (num_values > 0) { 64 cat++; 65 num_values >>= 1; 66 } 67 return cat; 68 } 69 70 #if CONFIG_DEBUG 71 #define CHECK_MEM_ERROR(cm, lval, expr) do { \ 72 lval = (expr); \ 73 if (!lval) \ 74 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \ 75 "Failed to allocate "#lval" at %s:%d", \ 76 __FILE__, __LINE__); \ 77 } while (0) 78 #else 79 #define CHECK_MEM_ERROR(cm, lval, expr) do { \ 80 lval = (expr); \ 81 if (!lval) \ 82 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \ 83 "Failed to allocate "#lval); \ 84 } while (0) 85 #endif 86 87 #define SYNC_CODE_0 0x49 88 #define SYNC_CODE_1 0x83 89 #define SYNC_CODE_2 0x42 90 91 92 #endif // VP9_COMMON_VP9_COMMON_H_ 93
