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
24 extern "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
clip_pixel(int val)51 static INLINE uint8_t clip_pixel(int val) {
52 return (val > 255) ? 255 : (val < 0) ? 0 : val;
53 }
54
clamp(int value,int low,int high)55 static INLINE int clamp(int value, int low, int high) {
56 return value < low ? low : (value > high ? high : value);
57 }
58
fclamp(double value,double low,double high)59 static INLINE double fclamp(double value, double low, double high) {
60 return value < low ? low : (value > high ? high : value);
61 }
62
get_unsigned_bits(unsigned int num_values)63 static 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