diff options
author | Mohamed Tarek <mt@rockbox.org> | 2010-04-30 11:11:56 +0000 |
---|---|---|
committer | Mohamed Tarek <mt@rockbox.org> | 2010-04-30 11:11:56 +0000 |
commit | cf43e5083b9e0f87de262ea31fd8067225ebfcda (patch) | |
tree | 073e6f4cd9561564d85e410a35432e1f4ead5b11 /apps/codecs/libwmapro/libavutil/mem.c | |
parent | bc3c5c16571487bf71fed8c22b30ee40481e156e (diff) | |
download | rockbox-cf43e5083b9e0f87de262ea31fd8067225ebfcda.tar.gz rockbox-cf43e5083b9e0f87de262ea31fd8067225ebfcda.zip |
Add libwmapro to apps/codecs. These files comprise a set of unmodified files needed from ffmpeg's libavcodec and libavutil to compile and use the wma pro decoder standalone. The files were taken from ffmpeg's svn r22886 dated 15 April 2010.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25763 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/libwmapro/libavutil/mem.c')
-rw-r--r-- | apps/codecs/libwmapro/libavutil/mem.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/apps/codecs/libwmapro/libavutil/mem.c b/apps/codecs/libwmapro/libavutil/mem.c new file mode 100644 index 0000000000..4d776d4450 --- /dev/null +++ b/apps/codecs/libwmapro/libavutil/mem.c | |||
@@ -0,0 +1,176 @@ | |||
1 | /* | ||
2 | * default memory allocator for libavutil | ||
3 | * Copyright (c) 2002 Fabrice Bellard | ||
4 | * | ||
5 | * This file is part of FFmpeg. | ||
6 | * | ||
7 | * FFmpeg is free software; you can redistribute it and/or | ||
8 | * modify it under the terms of the GNU Lesser General Public | ||
9 | * License as published by the Free Software Foundation; either | ||
10 | * version 2.1 of the License, or (at your option) any later version. | ||
11 | * | ||
12 | * FFmpeg is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
15 | * Lesser General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU Lesser General Public | ||
18 | * License along with FFmpeg; if not, write to the Free Software | ||
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
20 | */ | ||
21 | |||
22 | /** | ||
23 | * @file libavutil/mem.c | ||
24 | * default memory allocator for libavutil | ||
25 | */ | ||
26 | |||
27 | #include "config.h" | ||
28 | |||
29 | #include <limits.h> | ||
30 | #include <stdlib.h> | ||
31 | #include <string.h> | ||
32 | #if HAVE_MALLOC_H | ||
33 | #include <malloc.h> | ||
34 | #endif | ||
35 | |||
36 | #include "avutil.h" | ||
37 | #include "mem.h" | ||
38 | |||
39 | /* here we can use OS-dependent allocation functions */ | ||
40 | #undef free | ||
41 | #undef malloc | ||
42 | #undef realloc | ||
43 | |||
44 | #ifdef MALLOC_PREFIX | ||
45 | |||
46 | #define malloc AV_JOIN(MALLOC_PREFIX, malloc) | ||
47 | #define memalign AV_JOIN(MALLOC_PREFIX, memalign) | ||
48 | #define posix_memalign AV_JOIN(MALLOC_PREFIX, posix_memalign) | ||
49 | #define realloc AV_JOIN(MALLOC_PREFIX, realloc) | ||
50 | #define free AV_JOIN(MALLOC_PREFIX, free) | ||
51 | |||
52 | void *malloc(size_t size); | ||
53 | void *memalign(size_t align, size_t size); | ||
54 | int posix_memalign(void **ptr, size_t align, size_t size); | ||
55 | void *realloc(void *ptr, size_t size); | ||
56 | void free(void *ptr); | ||
57 | |||
58 | #endif /* MALLOC_PREFIX */ | ||
59 | |||
60 | /* You can redefine av_malloc and av_free in your project to use your | ||
61 | memory allocator. You do not need to suppress this file because the | ||
62 | linker will do it automatically. */ | ||
63 | |||
64 | void *av_malloc(unsigned int size) | ||
65 | { | ||
66 | void *ptr = NULL; | ||
67 | #if CONFIG_MEMALIGN_HACK | ||
68 | long diff; | ||
69 | #endif | ||
70 | |||
71 | /* let's disallow possible ambiguous cases */ | ||
72 | if(size > (INT_MAX-16) ) | ||
73 | return NULL; | ||
74 | |||
75 | #if CONFIG_MEMALIGN_HACK | ||
76 | ptr = malloc(size+16); | ||
77 | if(!ptr) | ||
78 | return ptr; | ||
79 | diff= ((-(long)ptr - 1)&15) + 1; | ||
80 | ptr = (char*)ptr + diff; | ||
81 | ((char*)ptr)[-1]= diff; | ||
82 | #elif HAVE_POSIX_MEMALIGN | ||
83 | if (posix_memalign(&ptr,16,size)) | ||
84 | ptr = NULL; | ||
85 | #elif HAVE_MEMALIGN | ||
86 | ptr = memalign(16,size); | ||
87 | /* Why 64? | ||
88 | Indeed, we should align it: | ||
89 | on 4 for 386 | ||
90 | on 16 for 486 | ||
91 | on 32 for 586, PPro - K6-III | ||
92 | on 64 for K7 (maybe for P3 too). | ||
93 | Because L1 and L2 caches are aligned on those values. | ||
94 | But I don't want to code such logic here! | ||
95 | */ | ||
96 | /* Why 16? | ||
97 | Because some CPUs need alignment, for example SSE2 on P4, & most RISC CPUs | ||
98 | it will just trigger an exception and the unaligned load will be done in the | ||
99 | exception handler or it will just segfault (SSE2 on P4). | ||
100 | Why not larger? Because I did not see a difference in benchmarks ... | ||
101 | */ | ||
102 | /* benchmarks with P3 | ||
103 | memalign(64)+1 3071,3051,3032 | ||
104 | memalign(64)+2 3051,3032,3041 | ||
105 | memalign(64)+4 2911,2896,2915 | ||
106 | memalign(64)+8 2545,2554,2550 | ||
107 | memalign(64)+16 2543,2572,2563 | ||
108 | memalign(64)+32 2546,2545,2571 | ||
109 | memalign(64)+64 2570,2533,2558 | ||
110 | |||
111 | BTW, malloc seems to do 8-byte alignment by default here. | ||
112 | */ | ||
113 | #else | ||
114 | ptr = malloc(size); | ||
115 | #endif | ||
116 | return ptr; | ||
117 | } | ||
118 | |||
119 | void *av_realloc(void *ptr, unsigned int size) | ||
120 | { | ||
121 | #if CONFIG_MEMALIGN_HACK | ||
122 | int diff; | ||
123 | #endif | ||
124 | |||
125 | /* let's disallow possible ambiguous cases */ | ||
126 | if(size > (INT_MAX-16) ) | ||
127 | return NULL; | ||
128 | |||
129 | #if CONFIG_MEMALIGN_HACK | ||
130 | //FIXME this isn't aligned correctly, though it probably isn't needed | ||
131 | if(!ptr) return av_malloc(size); | ||
132 | diff= ((char*)ptr)[-1]; | ||
133 | return (char*)realloc((char*)ptr - diff, size + diff) + diff; | ||
134 | #else | ||
135 | return realloc(ptr, size); | ||
136 | #endif | ||
137 | } | ||
138 | |||
139 | void av_free(void *ptr) | ||
140 | { | ||
141 | /* XXX: this test should not be needed on most libcs */ | ||
142 | if (ptr) | ||
143 | #if CONFIG_MEMALIGN_HACK | ||
144 | free((char*)ptr - ((char*)ptr)[-1]); | ||
145 | #else | ||
146 | free(ptr); | ||
147 | #endif | ||
148 | } | ||
149 | |||
150 | void av_freep(void *arg) | ||
151 | { | ||
152 | void **ptr= (void**)arg; | ||
153 | av_free(*ptr); | ||
154 | *ptr = NULL; | ||
155 | } | ||
156 | |||
157 | void *av_mallocz(unsigned int size) | ||
158 | { | ||
159 | void *ptr = av_malloc(size); | ||
160 | if (ptr) | ||
161 | memset(ptr, 0, size); | ||
162 | return ptr; | ||
163 | } | ||
164 | |||
165 | char *av_strdup(const char *s) | ||
166 | { | ||
167 | char *ptr= NULL; | ||
168 | if(s){ | ||
169 | int len = strlen(s) + 1; | ||
170 | ptr = av_malloc(len); | ||
171 | if (ptr) | ||
172 | memcpy(ptr, s, len); | ||
173 | } | ||
174 | return ptr; | ||
175 | } | ||
176 | |||