mem.c File Reference

default memory allocator for libavutil More...

#include "config.h"
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "avassert.h"
#include "avutil.h"
#include "common.h"
#include "intreadwrite.h"
#include "mem.h"

Go to the source code of this file.

Macros
#define	_XOPEN_SOURCE   600
#define	ALIGN   (HAVE_AVX ? 32 : 16)

Functions
void	av_max_alloc (size_t max)
	Set the maximum size that may me allocated in one block.
void *	av_malloc (size_t size)
	Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU).
void *	av_realloc (void *ptr, size_t size)
	Allocate or reallocate a block of memory.
void *	av_realloc_f (void *ptr, size_t nelem, size_t elsize)
	Allocate or reallocate a block of memory.
int	av_reallocp (void *ptr, size_t size)
	Allocate or reallocate a block of memory.
void *	av_realloc_array (void *ptr, size_t nmemb, size_t size)
int	av_reallocp_array (void *ptr, size_t nmemb, size_t size)
void	av_free (void *ptr)
	Free a memory block which has been allocated with av_malloc(z)() or av_realloc().
void	av_freep (void *arg)
	Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer pointing to it to NULL.
void *	av_mallocz (size_t size)
	Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block.
void *	av_calloc (size_t nmemb, size_t size)
	Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vectors if available on the CPU) and zero all the bytes of the block.
char *	av_strdup (const char *s)
	Duplicate the string s.
void *	av_memdup (const void *p, size_t size)
	Duplicate the buffer p.
void	av_dynarray_add (void *tab_ptr, int *nb_ptr, void *elem)
	Add an element to a dynamic array.
void *	av_dynarray2_add (void **tab_ptr, int *nb_ptr, size_t elem_size, const uint8_t *elem_data)
	Add an element of size elem_size to a dynamic array.
static void	fill16 (uint8_t *dst, int len)
static void	fill24 (uint8_t *dst, int len)
static void	fill32 (uint8_t *dst, int len)
void	av_memcpy_backptr (uint8_t *dst, int back, int cnt)
	deliberately overlapping memcpy implementation
void *	av_fast_realloc (void *ptr, unsigned int *size, size_t min_size)
	Reallocate the given block if it is not large enough, otherwise do nothing.
static int	ff_fast_malloc (void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
void	av_fast_malloc (void *ptr, unsigned int *size, size_t min_size)
	Allocate a buffer, reusing the given one if large enough.

Variables
static size_t	max_alloc_size = INT_MAX

Detailed Description

default memory allocator for libavutil

Definition in file mem.c.

Macro Definition Documentation

#define _XOPEN_SOURCE   600

Definition at line 27 of file mem.c.

#define ALIGN   (HAVE_AVX ? 32 : 16)

Definition at line 61 of file mem.c.

Referenced by av_free(), av_malloc(), and av_realloc().

Function Documentation

void* av_realloc_array	(	void *	ptr,
		size_t	nmemb,
		size_t	size
	)

Definition at line 204 of file mem.c.

Referenced by avformat_new_stream(), decode_nal_units(), ebml_parse_elem(), ff_insert_pad(), ff_program_add_stream_index(), ff_rtmp_check_alloc_array(), handler(), mkv_add_cuepoint(), mkv_add_seekhead_entry(), mxf_add_metadata_set(), mxf_read_partition_pack(), parse_nal_units(), and sample_queue_push().

int av_reallocp_array	(	void *	ptr,
		size_t	nmemb,
		size_t	size
	)

Definition at line 211 of file mem.c.

Referenced by add_fragment(), add_pat_entry(), decode_nal_units(), ff_hevc_extract_rbsp(), ff_mov_write_packet(), gxf_write_map_packet(), gxf_write_packet(), hvcc_array_add_nal_unit(), mov_build_index(), mov_flush_fragment(), mov_read_trex(), mov_read_trun(), mxf_write_packet(), mxf_write_partition(), nut_write_packet(), ogg_restore(), parse_strk(), tgv_decode_inter(), tm2_read_stream(), update_index(), and vp56_size_changed().

static void fill16 ( uint8_t *  dst, int  len  )

static

Definition at line 343 of file mem.c.

Referenced by av_memcpy_backptr().

static void fill24 ( uint8_t *  dst, int  len  )

static

Definition at line 361 of file mem.c.

Referenced by av_memcpy_backptr().

static void fill32 ( uint8_t *  dst, int  len  )

static

Definition at line 401 of file mem.c.

Referenced by av_memcpy_backptr().

static int ff_fast_malloc ( void *  ptr, unsigned int *  size, size_t  min_size, int  zero_realloc  )

inlinestatic

Definition at line 486 of file mem.c.

Referenced by av_fast_malloc().

Variable Documentation

size_t max_alloc_size = INT_MAX

static

Definition at line 68 of file mem.c.

Referenced by av_malloc(), av_max_alloc(), and av_realloc().