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_dsp/vpx_dsp_common.h"
20 #include "vpx_mem/vpx_mem.h"
21 #include "vpx/vpx_integer.h"
22 #include "vpx_ports/bitops.h"
23
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27
28 // Only need this for fixed-size arrays, for structs just assign.
29 #define vp9_copy(dest, src) { \
30 assert(sizeof(dest) == sizeof(src)); \
31 memcpy(dest, src, sizeof(src)); \
32 }
33
34 // Use this for variably-sized arrays.
35 #define vp9_copy_array(dest, src, n) { \
36 assert(sizeof(*dest) == sizeof(*src)); \
37 memcpy(dest, src, n * sizeof(*src)); \
38 }
39
40 #define vp9_zero(dest) memset(&(dest), 0, sizeof(dest))
41 #define vp9_zero_array(dest, n) memset(dest, 0, n * sizeof(*dest))
42
get_unsigned_bits(unsigned int num_values)43 static INLINE int get_unsigned_bits(unsigned int num_values) {
44 return num_values > 0 ? get_msb(num_values) + 1 : 0;
45 }
46
47 #if CONFIG_DEBUG
48 #define CHECK_MEM_ERROR(cm, lval, expr) do { \
49 lval = (expr); \
50 if (!lval) \
51 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \
52 "Failed to allocate "#lval" at %s:%d", \
53 __FILE__, __LINE__); \
54 } while (0)
55 #else
56 #define CHECK_MEM_ERROR(cm, lval, expr) do { \
57 lval = (expr); \
58 if (!lval) \
59 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \
60 "Failed to allocate "#lval); \
61 } while (0)
62 #endif
63
64 #define VP9_SYNC_CODE_0 0x49
65 #define VP9_SYNC_CODE_1 0x83
66 #define VP9_SYNC_CODE_2 0x42
67
68 #define VP9_FRAME_MARKER 0x2
69
70
71 #ifdef __cplusplus
72 } // extern "C"
73 #endif
74
75 #endif // VP9_COMMON_VP9_COMMON_H_
76