Fix typo.
[libav.git] / libavutil / internal.h
1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file internal.h
23 * common internal api header.
24 */
25
26 #ifndef FFMPEG_INTERNAL_H
27 #define FFMPEG_INTERNAL_H
28
29 #if !defined(DEBUG) && !defined(NDEBUG)
30 # define NDEBUG
31 #endif
32
33 #include <stdint.h>
34 #include <stddef.h>
35 #include <assert.h>
36
37 #ifndef attribute_align_arg
38 #if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__>1)
39 # define attribute_align_arg __attribute__((force_align_arg_pointer))
40 #else
41 # define attribute_align_arg
42 #endif
43 #endif
44
45 #ifndef attribute_used
46 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
47 # define attribute_used __attribute__((used))
48 #else
49 # define attribute_used
50 #endif
51 #endif
52
53 /* Use Apple-specific AltiVec syntax for vector declarations when necessary. */
54 #ifdef __APPLE_CC__
55 #define AVV(x...) (x)
56 #else
57 #define AVV(x...) {x}
58 #endif
59
60 #ifndef M_PI
61 #define M_PI 3.14159265358979323846
62 #endif
63
64 #ifndef INT16_MIN
65 #define INT16_MIN (-0x7fff-1)
66 #endif
67
68 #ifndef INT16_MAX
69 #define INT16_MAX 0x7fff
70 #endif
71
72 #ifndef INT32_MIN
73 #define INT32_MIN (-0x7fffffff-1)
74 #endif
75
76 #ifndef INT32_MAX
77 #define INT32_MAX 0x7fffffff
78 #endif
79
80 #ifndef UINT32_MAX
81 #define UINT32_MAX 0xffffffff
82 #endif
83
84 #ifndef INT64_MIN
85 #define INT64_MIN (-0x7fffffffffffffffLL-1)
86 #endif
87
88 #ifndef INT64_MAX
89 #define INT64_MAX INT64_C(9223372036854775807)
90 #endif
91
92 #ifndef UINT64_MAX
93 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
94 #endif
95
96 #ifndef INT_BIT
97 # if INT_MAX != 2147483647
98 # define INT_BIT 64
99 # else
100 # define INT_BIT 32
101 # endif
102 #endif
103
104 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
105 # define PIC
106 #endif
107
108 #include "intreadwrite.h"
109 #include "bswap.h"
110
111 #ifndef offsetof
112 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
113 #endif
114
115 #ifdef USE_FASTMEMCPY
116 # include "libvo/fastmemcpy.h"
117 # define memcpy(a,b,c) fast_memcpy(a,b,c)
118 #endif
119
120 // Use rip-relative addressing if compiling PIC code on x86-64.
121 #if defined(__MINGW32__) || defined(__CYGWIN__) || \
122 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
123 # if defined(ARCH_X86_64) && defined(PIC)
124 # define MANGLE(a) "_" #a"(%%rip)"
125 # else
126 # define MANGLE(a) "_" #a
127 # endif
128 #else
129 # if defined(ARCH_X86_64) && defined(PIC)
130 # define MANGLE(a) #a"(%%rip)"
131 # elif defined(__APPLE__)
132 # define MANGLE(a) "_" #a
133 # else
134 # define MANGLE(a) #a
135 # endif
136 #endif
137
138 /* debug stuff */
139
140 /* dprintf macros */
141 #ifdef DEBUG
142 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
143 #else
144 # define dprintf(pctx, ...)
145 #endif
146
147 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
148
149 /* math */
150
151 extern const uint32_t ff_inverse[256];
152
153 #if defined(ARCH_X86)
154 # define FASTDIV(a,b) \
155 ({\
156 int ret,dmy;\
157 asm volatile(\
158 "mull %3"\
159 :"=d"(ret),"=a"(dmy)\
160 :"1"(a),"g"(ff_inverse[b])\
161 );\
162 ret;\
163 })
164 #elif defined(ARCH_ARMV4L)
165 # define FASTDIV(a,b) \
166 ({\
167 int ret,dmy;\
168 asm volatile(\
169 "umull %1, %0, %2, %3"\
170 :"=&r"(ret),"=&r"(dmy)\
171 :"r"(a),"r"(ff_inverse[b])\
172 );\
173 ret;\
174 })
175 #elif defined(CONFIG_FASTDIV)
176 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
177 #else
178 # define FASTDIV(a,b) ((a)/(b))
179 #endif
180
181 extern const uint8_t ff_sqrt_tab[128];
182
183 static inline int ff_sqrt(int a)
184 {
185 int ret=0;
186 int s, b;
187
188 if(a<128) return ff_sqrt_tab[a];
189
190 for(s=30; s>=0; s-=2){
191 ret+=ret;
192 b= (1+2*ret)<<s;
193 if(b<=a){
194 a-=b;
195 ret++;
196 }
197 }
198 return ret;
199 }
200
201 #if defined(ARCH_X86)
202 #define MASK_ABS(mask, level)\
203 asm volatile(\
204 "cdq \n\t"\
205 "xorl %1, %0 \n\t"\
206 "subl %1, %0 \n\t"\
207 : "+a" (level), "=&d" (mask)\
208 );
209 #else
210 #define MASK_ABS(mask, level)\
211 mask= level>>31;\
212 level= (level^mask)-mask;
213 #endif
214
215 #ifdef HAVE_CMOV
216 #define COPY3_IF_LT(x,y,a,b,c,d)\
217 asm volatile (\
218 "cmpl %0, %3 \n\t"\
219 "cmovl %3, %0 \n\t"\
220 "cmovl %4, %1 \n\t"\
221 "cmovl %5, %2 \n\t"\
222 : "+&r" (x), "+&r" (a), "+r" (c)\
223 : "r" (y), "r" (b), "r" (d)\
224 );
225 #else
226 #define COPY3_IF_LT(x,y,a,b,c,d)\
227 if((y)<(x)){\
228 (x)=(y);\
229 (a)=(b);\
230 (c)=(d);\
231 }
232 #endif
233
234 /* avoid usage of various functions */
235 #undef malloc
236 #define malloc please_use_av_malloc
237 #undef free
238 #define free please_use_av_free
239 #undef realloc
240 #define realloc please_use_av_realloc
241 #undef time
242 #define time time_is_forbidden_due_to_security_issues
243 #undef rand
244 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
245 #undef srand
246 #define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
247 #undef random
248 #define random random_is_forbidden_due_to_state_trashing_use_av_random
249 #undef sprintf
250 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
251 #undef strcat
252 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
253 #undef exit
254 #define exit exit_is_forbidden
255 #if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
256 #undef printf
257 #define printf please_use_av_log
258 #undef fprintf
259 #define fprintf please_use_av_log
260 #endif
261
262 #define CHECKED_ALLOCZ(p, size)\
263 {\
264 p= av_mallocz(size);\
265 if(p==NULL && (size)!=0){\
266 perror("malloc");\
267 goto fail;\
268 }\
269 }
270
271 #ifndef HAVE_LRINTF
272 /* XXX: add ISOC specific test to avoid specific BSD testing. */
273 /* better than nothing implementation. */
274 /* btw, rintf() is existing on fbsd too -- alex */
275 static av_always_inline long int lrintf(float x)
276 {
277 return (int)(rint(x));
278 }
279 #endif /* HAVE_LRINTF */
280
281 #endif /* FFMPEG_INTERNAL_H */