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/*
* 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 VP9_COMMON_VP9_COMMON_H_
#define VP9_COMMON_VP9_COMMON_H_
/* Interface header for common constant data structures and lookup tables */
#include <assert.h>
#include "./vpx_config.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx/vpx_integer.h"
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
#define ROUND_POWER_OF_TWO(value, n) \
(((value) + (1 << ((n) - 1))) >> (n))
#define ALIGN_POWER_OF_TWO(value, n) \
(((value) + ((1 << (n)) - 1)) & ~((1 << (n)) - 1))
// Only need this for fixed-size arrays, for structs just assign.
#define vp9_copy(dest, src) { \
assert(sizeof(dest) == sizeof(src)); \
vpx_memcpy(dest, src, sizeof(src)); \
}
// Use this for variably-sized arrays.
#define vp9_copy_array(dest, src, n) { \
assert(sizeof(*dest) == sizeof(*src)); \
vpx_memcpy(dest, src, n * sizeof(*src)); \
}
#define vp9_zero(dest) vpx_memset(&dest, 0, sizeof(dest))
#define vp9_zero_array(dest, n) vpx_memset(dest, 0, n * sizeof(*dest))
static INLINE uint8_t clip_pixel(int val) {
return (val > 255) ? 255u : (val < 0) ? 0u : val;
}
static INLINE int clamp(int value, int low, int high) {
return value < low ? low : (value > high ? high : value);
}
static INLINE double fclamp(double value, double low, double high) {
return value < low ? low : (value > high ? high : value);
}
static int get_unsigned_bits(unsigned int num_values) {
int cat = 0;
if (num_values <= 1)
return 0;
num_values--;
while (num_values > 0) {
cat++;
num_values >>= 1;
}
return cat;
}
#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
#endif // VP9_COMMON_VP9_COMMON_H_
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