vp10/common/common.h

/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef VP10_COMMON_COMMON_H_
#define VP10_COMMON_COMMON_H_

/* Interface header for common constant data structures and lookup tables */

#include <assert.h>

#include "./vpx_config.h"
#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx/vpx_integer.h"
#include "vpx_ports/bitops.h"

#ifdef __cplusplus
extern "C" {
#endif

// Only need this for fixed-size arrays, for structs just assign.
#define vp10_copy(dest, src) {            \
    assert(sizeof(dest) == sizeof(src)); \
    memcpy(dest, src, sizeof(src));  \
  }

// Use this for variably-sized arrays.
#define vp10_copy_array(dest, src, n) {       \
    assert(sizeof(*dest) == sizeof(*src));   \
    memcpy(dest, src, n * sizeof(*src)); \
  }

#define vp10_zero(dest) memset(&(dest), 0, sizeof(dest))
#define vp10_zero_array(dest, n) memset(dest, 0, n * sizeof(*dest))

static INLINE int get_unsigned_bits(unsigned int num_values) {
  return num_values > 0 ? get_msb(num_values) + 1 : 0;
}

#if CONFIG_DEBUG
#define CHECK_MEM_ERROR(cm, lval, expr) do { \
  lval = (expr); \
  if (!lval) \
    vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \
                       "Failed to allocate "#lval" at %s:%d", \
                       __FILE__, __LINE__); \
  } while (0)
#else
#define CHECK_MEM_ERROR(cm, lval, expr) do { \
  lval = (expr); \
  if (!lval) \
    vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, \
                       "Failed to allocate "#lval); \
  } while (0)
#endif
// TODO(yaowu: validate the usage of these codes or develop new ones.)
#define VP10_SYNC_CODE_0 0x49
#define VP10_SYNC_CODE_1 0x83
#define VP10_SYNC_CODE_2 0x43

#define VP9_FRAME_MARKER 0x2


#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // VP10_COMMON_COMMON_H_