/*
 *  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 VPX_VP9_COMMON_VP9_COMMON_H_
#define VPX_VP9_COMMON_VP9_COMMON_H_

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

#define INLINE __inline
#include <assert.h>
#include <stdint.h>
#include "bitops.h"

#ifdef __cplusplus
extern "C" {
#endif

// Only need this for fixed-size arrays, for structs just assign.
#define vp9_copy(dest, src)              \
  {                                      \
    assert(sizeof(dest) == sizeof(src)); \
    memcpy(dest, src, sizeof(src));      \
  }

// Use this for variably-sized arrays.
#define vp9_copy_array(dest, src, n)       \
  {                                        \
    assert(sizeof(*dest) == sizeof(*src)); \
    memcpy(dest, src, n * sizeof(*src));   \
  }

#define vp9_zero(dest) memset(&(dest), 0, sizeof(dest))
#define vp9_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

#define VP9_SYNC_CODE_0 0x49
#define VP9_SYNC_CODE_1 0x83
#define VP9_SYNC_CODE_2 0x42

#define VP9_FRAME_MARKER 0x2

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

#endif  // VPX_VP9_COMMON_VP9_COMMON_H_
