mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
/*
|
|
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file mem.h
|
|
* Memory handling functions.
|
|
*/
|
|
|
|
#ifndef FFMPEG_MEM_H
|
|
#define FFMPEG_MEM_H
|
|
|
|
#ifdef __ICC
|
|
#define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
|
|
#define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v
|
|
#elif defined(__GNUC__)
|
|
#define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
|
|
#define DECLARE_ASM_CONST(n,t,v) static const t v attribute_used __attribute__ ((aligned (n)))
|
|
#elif defined(_MSC_VER)
|
|
#define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
|
|
#define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v
|
|
#else
|
|
// #warning No align and asm directives, this might fail.
|
|
#define DECLARE_ALIGNED(n,t,v) t v
|
|
#define DECLARE_ASM_CONST(n,t,v) static const t v
|
|
#endif
|
|
|
|
/**
|
|
* Allocate a block of \p size bytes with alignment suitable for all
|
|
* memory accesses (including vectors if available on the CPU).
|
|
* @param size Size in bytes for the memory block to be allocated.
|
|
* @return Pointer to the allocated block, NULL if it cannot allocate
|
|
* it.
|
|
* @see av_mallocz()
|
|
*/
|
|
void *av_malloc(unsigned int size);
|
|
|
|
/**
|
|
* Allocate or reallocate a block of memory.
|
|
* If \p ptr is NULL and \p size > 0, allocate a new block. If \p
|
|
* size is zero, free the memory block pointed by \p ptr.
|
|
* @param size Size in bytes for the memory block to be allocated or
|
|
* reallocated.
|
|
* @param ptr Pointer to a memory block already allocated with
|
|
* av_malloc(z)() or av_realloc() or NULL.
|
|
* @return Pointer to a newly reallocated block or NULL if it cannot
|
|
* reallocate or the function is used to free the memory block.
|
|
* @see av_fast_realloc()
|
|
*/
|
|
void *av_realloc(void *ptr, unsigned int size);
|
|
|
|
/**
|
|
* Free a memory block which has been allocated with av_malloc(z)() or
|
|
* av_realloc().
|
|
* @param ptr Pointer to the memory block which should be freed.
|
|
* @note ptr = NULL is explicitly allowed.
|
|
* @note It is recommended that you use av_freep() instead.
|
|
* @see av_freep()
|
|
*/
|
|
void av_free(void *ptr);
|
|
|
|
/**
|
|
* Allocate a block of \p size bytes with alignment suitable for all
|
|
* memory accesses (including vectors if available on the CPU) and
|
|
* set to zeroes all the bytes of the block.
|
|
* @param size Size in bytes for the memory block to be allocated.
|
|
* @return Pointer to the allocated block, NULL if it cannot allocate
|
|
* it.
|
|
* @see av_malloc()
|
|
*/
|
|
void *av_mallocz(unsigned int size);
|
|
|
|
/**
|
|
* Duplicate the string \p s.
|
|
* @param s String to be duplicated.
|
|
* @return Pointer to a newly allocated string containing a
|
|
* copy of \p s or NULL if it cannot be allocated.
|
|
*/
|
|
char *av_strdup(const char *s);
|
|
|
|
/**
|
|
* Free a memory block which has been allocated with av_malloc(z)() or
|
|
* av_realloc() and set to NULL the pointer to it.
|
|
* @param ptr Pointer to the pointer to the memory block which should
|
|
* be freed.
|
|
* @see av_free()
|
|
*/
|
|
void av_freep(void *ptr);
|
|
|
|
#endif /* FFMPEG_MEM_H */
|