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#include "vp9/common/vp9_systemdependent.h" 22 23#ifdef __cplusplus 24extern "C" { 25#endif 26 27#define MIN(x, y) (((x) < (y)) ? (x) : (y)) 28#define MAX(x, y) (((x) > (y)) ? (x) : (y)) 29 30#define ROUND_POWER_OF_TWO(value, n) \ 31 (((value) + (1 << ((n) - 1))) >> (n)) 32 33#define ALIGN_POWER_OF_TWO(value, n) \ 34 (((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1)) 35 36// Only need this for fixed-size arrays, for structs just assign. 37#define vp9_copy(dest, src) { \ 38 assert(sizeof(dest) == sizeof(src)); \ 39 vpx_memcpy(dest, src, sizeof(src)); \ 40 } 41 42// Use this for variably-sized arrays. 43#define vp9_copy_array(dest, src, n) { \ 44 assert(sizeof(*dest) == sizeof(*src)); \ 45 vpx_memcpy(dest, src, n * sizeof(*src)); \ 46 } 47 48#define vp9_zero(dest) vpx_memset(&dest, 0, sizeof(dest)) 49#define vp9_zero_array(dest, n) vpx_memset(dest, 0, n * sizeof(*dest)) 50 51static INLINE uint8_t clip_pixel(int val) { 52 return (val > 255) ? 255 : (val < 0) ? 0 : val; 53} 54 55static INLINE int clamp(int value, int low, int high) { 56 return value < low ? low : (value > high ? high : value); 57} 58 59static INLINE double fclamp(double value, double low, double high) { 60 return value < low ? low : (value > high ? high : value); 61} 62 63static INLINE int get_unsigned_bits(unsigned int num_values) { 64 return num_values > 0 ? get_msb(num_values) + 1 : 0; 65} 66 67#if CONFIG_DEBUG 68#define CHECK_MEM_ERROR(cm, lval, expr) do { \ 69 lval = (expr); \ 70 if (!lval) \ 71 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \ 72 "Failed to allocate "#lval" at %s:%d", \ 73 __FILE__, __LINE__); \ 74 } while (0) 75#else 76#define CHECK_MEM_ERROR(cm, lval, expr) do { \ 77 lval = (expr); \ 78 if (!lval) \ 79 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \ 80 "Failed to allocate "#lval); \ 81 } while (0) 82#endif 83 84#define VP9_SYNC_CODE_0 0x49 85#define VP9_SYNC_CODE_1 0x83 86#define VP9_SYNC_CODE_2 0x42 87 88#define VP9_FRAME_MARKER 0x2 89 90 91#ifdef __cplusplus 92} // extern "C" 93#endif 94 95#endif // VP9_COMMON_VP9_COMMON_H_ 96