mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
158 lines
5.2 KiB
C
158 lines
5.2 KiB
C
/*
|
|
* Copyright (c) 2002 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVUTIL_MEM_INTERNAL_H
|
|
#define AVUTIL_MEM_INTERNAL_H
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "avassert.h"
|
|
#include "mem.h"
|
|
#include "version.h"
|
|
|
|
#if !FF_API_DECLARE_ALIGNED
|
|
/**
|
|
* @def DECLARE_ALIGNED(n,t,v)
|
|
* Declare a variable that is aligned in memory.
|
|
*
|
|
* @code{.c}
|
|
* DECLARE_ALIGNED(16, uint16_t, aligned_int) = 42;
|
|
* DECLARE_ALIGNED(32, uint8_t, aligned_array)[128];
|
|
*
|
|
* // The default-alignment equivalent would be
|
|
* uint16_t aligned_int = 42;
|
|
* uint8_t aligned_array[128];
|
|
* @endcode
|
|
*
|
|
* @param n Minimum alignment in bytes
|
|
* @param t Type of the variable (or array element)
|
|
* @param v Name of the variable
|
|
*/
|
|
|
|
/**
|
|
* @def DECLARE_ASM_ALIGNED(n,t,v)
|
|
* Declare an aligned variable appropriate for use in inline assembly code.
|
|
*
|
|
* @code{.c}
|
|
* DECLARE_ASM_ALIGNED(16, uint64_t, pw_08) = UINT64_C(0x0008000800080008);
|
|
* @endcode
|
|
*
|
|
* @param n Minimum alignment in bytes
|
|
* @param t Type of the variable (or array element)
|
|
* @param v Name of the variable
|
|
*/
|
|
|
|
/**
|
|
* @def DECLARE_ASM_CONST(n,t,v)
|
|
* Declare a static constant aligned variable appropriate for use in inline
|
|
* assembly code.
|
|
*
|
|
* @code{.c}
|
|
* DECLARE_ASM_CONST(16, uint64_t, pw_08) = UINT64_C(0x0008000800080008);
|
|
* @endcode
|
|
*
|
|
* @param n Minimum alignment in bytes
|
|
* @param t Type of the variable (or array element)
|
|
* @param v Name of the variable
|
|
*/
|
|
|
|
#if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1110 || defined(__SUNPRO_C)
|
|
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
|
|
#define DECLARE_ASM_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
|
|
#define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v
|
|
#elif defined(__DJGPP__)
|
|
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (FFMIN(n, 16)))) v
|
|
#define DECLARE_ASM_ALIGNED(n,t,v) t av_used __attribute__ ((aligned (FFMIN(n, 16)))) v
|
|
#define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (FFMIN(n, 16)))) v
|
|
#elif defined(__GNUC__) || defined(__clang__)
|
|
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
|
|
#define DECLARE_ASM_ALIGNED(n,t,v) t av_used __attribute__ ((aligned (n))) v
|
|
#define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (n))) v
|
|
#elif defined(_MSC_VER)
|
|
#define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
|
|
#define DECLARE_ASM_ALIGNED(n,t,v) __declspec(align(n)) t v
|
|
#define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v
|
|
#else
|
|
#define DECLARE_ALIGNED(n,t,v) t v
|
|
#define DECLARE_ASM_ALIGNED(n,t,v) t v
|
|
#define DECLARE_ASM_CONST(n,t,v) static const t v
|
|
#endif
|
|
#endif
|
|
|
|
// Some broken preprocessors need a second expansion
|
|
// to be forced to tokenize __VA_ARGS__
|
|
#define E1(x) x
|
|
|
|
#define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
|
|
uint8_t la_##v[sizeof(t s o) + (a)]; \
|
|
t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
|
|
|
|
#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
|
|
DECLARE_ALIGNED(a, t, la_##v) s o; \
|
|
t (*v) o = la_##v
|
|
|
|
#define LOCAL_ALIGNED(a, t, v, ...) LOCAL_ALIGNED_##a(t, v, __VA_ARGS__)
|
|
|
|
#if HAVE_LOCAL_ALIGNED
|
|
# define LOCAL_ALIGNED_4(t, v, ...) E1(LOCAL_ALIGNED_D(4, t, v, __VA_ARGS__,,))
|
|
#else
|
|
# define LOCAL_ALIGNED_4(t, v, ...) E1(LOCAL_ALIGNED_A(4, t, v, __VA_ARGS__,,))
|
|
#endif
|
|
|
|
#if HAVE_LOCAL_ALIGNED
|
|
# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
|
|
#else
|
|
# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_A(8, t, v, __VA_ARGS__,,))
|
|
#endif
|
|
|
|
#if HAVE_LOCAL_ALIGNED
|
|
# define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
|
|
#else
|
|
# define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_A(16, t, v, __VA_ARGS__,,))
|
|
#endif
|
|
|
|
#if HAVE_LOCAL_ALIGNED
|
|
# define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_D(32, t, v, __VA_ARGS__,,))
|
|
#else
|
|
# define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_A(32, t, v, __VA_ARGS__,,))
|
|
#endif
|
|
|
|
static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
|
|
{
|
|
void *val;
|
|
|
|
memcpy(&val, ptr, sizeof(val));
|
|
if (min_size <= *size) {
|
|
av_assert0(val || !min_size);
|
|
return 0;
|
|
}
|
|
min_size = FFMAX(min_size + min_size / 16 + 32, min_size);
|
|
av_freep(ptr);
|
|
val = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
|
|
memcpy(ptr, &val, sizeof(val));
|
|
if (!val)
|
|
min_size = 0;
|
|
*size = min_size;
|
|
return 1;
|
|
}
|
|
#endif /* AVUTIL_MEM_INTERNAL_H */
|