1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
(*
* 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
*
* This is a part of the Pascal port of ffmpeg.
* - Changes and updates by the UltraStar Deluxe Team
*
* Conversion of libavutil/mem.h
* avutil version 51.9.1
*
*)
(**
* @file
* error code definitions
*)
(* memory handling functions *)
(**
* Allocate a block of 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 the block cannot
* be allocated.
* @see av_mallocz()
*)
function av_malloc(size: size_t): pointer;
cdecl; external av__util; {av_malloc_attrib av_alloc_size(1)}
(**
* Allocate or reallocate a block of memory.
* If ptr is NULL and size > 0, allocate a new block. If
* size is zero, free the memory block pointed to by 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 the block
* cannot be allocated or the function is used to free the memory block.
* @see av_fast_realloc()
*)
function av_realloc(ptr: pointer; size: size_t): pointer;
cdecl; external av__util; {av_alloc_size(2)}
(**
* Allocate or reallocate a block of memory.
* This function does the same thing as av_realloc, except:
* - It takes two arguments and checks the result of the multiplication for
* integer overflow.
* - It frees the input block in case of failure, thus avoiding the memory
* leak with the classic "buf = realloc(buf); if (!buf) return -1;".
*)
{ available only in 0.8.5 - 0.8.10
function av_realloc_f(ptr: pointer; nelem: size_t; size: size_t): pointer;
cdecl; external av__util;
}
(**
* 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()
*)
procedure av_free(ptr: pointer);
cdecl; external av__util;
(**
* Allocate a block of size bytes with alignment suitable for all
* memory accesses (including vectors if available on the CPU) and
* 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 be allocated.
* @see av_malloc()
*)
function av_mallocz(size: size_t): pointer;
cdecl; external av__util; {av_malloc_attrib av_alloc_size(1)}
(**
* 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.
* The allocation will fail if nmemb * size is greater than or equal
* to INT_MAX.
* @param nmemb
* @param size
* @return Pointer to the allocated block, NULL if it cannot be allocated.
*)
(* available only in 0.8.5 - 0.8.10
function av_calloc(nmemb: size_t; size: size_t): pointer;
cdecl; external av__util; {av_malloc_attrib}
*)
(**
* Duplicate the string s.
* @param s string to be duplicated.
* @return Pointer to a newly allocated string containing a
* copy of s or NULL if the string cannot be allocated.
*)
function av_strdup({const} s: PAnsiChar): PAnsiChar;
cdecl; external av__util; {av_malloc_attrib}
(**
* Free a memory block which has been allocated with av_malloc(z)() or
* av_realloc() and set the pointer pointing to it to NULL.
* @param ptr Pointer to the pointer to the memory block which should
* be freed.
* @see av_free()
*)
procedure av_freep (ptr: pointer);
cdecl; external av__util;
(**
* Add an element to a dynamic array.
*
* @param tab_ptr Pointer to the array.
* @param nb_ptr Pointer to the number of elements in the array.
* @param elem Element to be added.
*)
procedure av_dynarray_add(tab_ptr: pointer; nb_ptr: PCint; elem: pointer);
cdecl; external av__util;
(**
* Multiply two size_t values checking for overflow.
* @return 0 if success, AVERROR(EINVAL) if overflow.
*)
{ available only in 0.8.5 - 0.8.10
//static inline int av_size_mult(size_t a, size_t b, size_t *r)
}
{
size_t t = a * b;
/* Hack inspired from glibc: only try the division if nelem and elsize
* are both greater than sqrt(SIZE_MAX). */
if ((a | b) >= ((size_t)1 << (sizeof(size_t) * 4)) && a && t / a != b)
return AVERROR(EINVAL);
*r = t;
return 0;
}
|
