vp10/common/common.h

   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 VP10_COMMON_COMMON_H_
  12 #define VP10_COMMON_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 vp10_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 vp10_copy_array(dest, src, n) {       \
  36     assert(sizeof(*dest) == sizeof(*src));   \
  37     memcpy(dest, src, n * sizeof(*src)); \
  38   }
  39
  40 #define vp10_zero(dest) memset(&(dest), 0, sizeof(dest))
  41 #define vp10_zero_array(dest, n) memset(dest, 0, n * sizeof(*dest))
  42
  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 // TODO(yaowu: validate the usage of these codes or develop new ones.)
  64 #define VP10_SYNC_CODE_0 0x49
  65 #define VP10_SYNC_CODE_1 0x83
  66 #define VP10_SYNC_CODE_2 0x43
  67
  68 #define VP9_FRAME_MARKER 0x2
  69
  70
  71 #ifdef __cplusplus
  72 }  // extern "C"
  73 #endif
  74
  75 #endif  // VP10_COMMON_COMMON_H_