794d9dc3519c1c8d0156a22568ca0fb07f7625c0
[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 INTERNAL_H
27 #define INTERNAL_H
28
29 #ifndef attribute_used
30 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
31 # define attribute_used __attribute__((used))
32 #else
33 # define attribute_used
34 #endif
35 #endif
36
37 #ifndef attribute_unused
38 #if defined(__GNUC__)
39 # define attribute_unused __attribute__((unused))
40 #else
41 # define attribute_unused
42 #endif
43 #endif
44
45 #ifndef M_PI
46 #define M_PI 3.14159265358979323846
47 #endif
48
49 #ifndef PRId64
50 #define PRId64 "lld"
51 #endif
52
53 #ifndef PRIu64
54 #define PRIu64 "llu"
55 #endif
56
57 #ifndef PRIx64
58 #define PRIx64 "llx"
59 #endif
60
61 #ifndef PRIX64
62 #define PRIX64 "llX"
63 #endif
64
65 #ifndef PRId32
66 #define PRId32 "d"
67 #endif
68
69 #ifndef PRIdFAST16
70 #define PRIdFAST16 PRId32
71 #endif
72
73 #ifndef PRIdFAST32
74 #define PRIdFAST32 PRId32
75 #endif
76
77 #ifndef INT16_MIN
78 #define INT16_MIN (-0x7fff-1)
79 #endif
80
81 #ifndef INT16_MAX
82 #define INT16_MAX 0x7fff
83 #endif
84
85 #ifndef INT32_MIN
86 #define INT32_MIN (-0x7fffffff-1)
87 #endif
88
89 #ifndef INT32_MAX
90 #define INT32_MAX 0x7fffffff
91 #endif
92
93 #ifndef UINT32_MAX
94 #define UINT32_MAX 0xffffffff
95 #endif
96
97 #ifndef INT64_MIN
98 #define INT64_MIN (-0x7fffffffffffffffLL-1)
99 #endif
100
101 #ifndef INT64_MAX
102 #define INT64_MAX INT64_C(9223372036854775807)
103 #endif
104
105 #ifndef UINT64_MAX
106 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
107 #endif
108
109 #ifndef INT_BIT
110 # if INT_MAX != 2147483647
111 # define INT_BIT 64
112 # else
113 # define INT_BIT 32
114 # endif
115 #endif
116
117 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
118 # define PIC
119 #endif
120
121 #include "intreadwrite.h"
122 #include "bswap.h"
123
124 #include <stddef.h>
125 #ifndef offsetof
126 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
127 #endif
128
129 #ifdef __MINGW32__
130 # ifdef _DEBUG
131 # define DEBUG
132 # endif
133
134 # define snprintf _snprintf
135 # define vsnprintf _vsnprintf
136
137 # ifdef CONFIG_WINCE
138 # define perror(a)
139 # define abort()
140 # endif
141
142 /* __MINGW32__ end */
143 #elif defined (CONFIG_OS2)
144 /* OS/2 EMX */
145
146 # include <float.h>
147
148 #endif /* !__MINGW32__ && CONFIG_OS2 */
149
150 #ifdef USE_FASTMEMCPY
151 # include "libvo/fastmemcpy.h"
152 #endif
153
154 // Use rip-relative addressing if compiling PIC code on x86-64.
155 #if defined(__MINGW32__) || defined(__CYGWIN__) || \
156 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
157 # if defined(ARCH_X86_64) && defined(PIC)
158 # define MANGLE(a) "_" #a"(%%rip)"
159 # else
160 # define MANGLE(a) "_" #a
161 # endif
162 #else
163 # if defined(ARCH_X86_64) && defined(PIC)
164 # define MANGLE(a) #a"(%%rip)"
165 # elif defined(CONFIG_DARWIN)
166 # define MANGLE(a) "_" #a
167 # else
168 # define MANGLE(a) #a
169 # endif
170 #endif
171
172 /* debug stuff */
173
174 #if !defined(DEBUG) && !defined(NDEBUG)
175 # define NDEBUG
176 #endif
177 #include <assert.h>
178
179 /* dprintf macros */
180 #ifdef DEBUG
181 # define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
182 #else
183 # define dprintf(fmt,...)
184 #endif
185
186 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
187
188 /* math */
189
190 extern const uint32_t ff_inverse[256];
191
192 #if defined(ARCH_X86)
193 # define FASTDIV(a,b) \
194 ({\
195 int ret,dmy;\
196 asm volatile(\
197 "mull %3"\
198 :"=d"(ret),"=a"(dmy)\
199 :"1"(a),"g"(ff_inverse[b])\
200 );\
201 ret;\
202 })
203 #elif defined(ARCH_ARMV4L)
204 # define FASTDIV(a,b) \
205 ({\
206 int ret,dmy;\
207 asm volatile(\
208 "umull %1, %0, %2, %3"\
209 :"=&r"(ret),"=&r"(dmy)\
210 :"r"(a),"r"(ff_inverse[b])\
211 );\
212 ret;\
213 })
214 #elif defined(CONFIG_FASTDIV)
215 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
216 #else
217 # define FASTDIV(a,b) ((a)/(b))
218 #endif
219
220 extern const uint8_t ff_sqrt_tab[128];
221
222 static inline int ff_sqrt(int a)
223 {
224 int ret=0;
225 int s;
226 int ret_sq=0;
227
228 if(a<128) return ff_sqrt_tab[a];
229
230 for(s=15; s>=0; s--){
231 int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
232 if(b<=a){
233 ret_sq=b;
234 ret+= 1<<s;
235 }
236 }
237 return ret;
238 }
239
240 #if defined(ARCH_X86)
241 #define MASK_ABS(mask, level)\
242 asm volatile(\
243 "cdq \n\t"\
244 "xorl %1, %0 \n\t"\
245 "subl %1, %0 \n\t"\
246 : "+a" (level), "=&d" (mask)\
247 );
248 #else
249 #define MASK_ABS(mask, level)\
250 mask= level>>31;\
251 level= (level^mask)-mask;
252 #endif
253
254 #ifdef HAVE_CMOV
255 #define COPY3_IF_LT(x,y,a,b,c,d)\
256 asm volatile (\
257 "cmpl %0, %3 \n\t"\
258 "cmovl %3, %0 \n\t"\
259 "cmovl %4, %1 \n\t"\
260 "cmovl %5, %2 \n\t"\
261 : "+r" (x), "+r" (a), "+r" (c)\
262 : "r" (y), "r" (b), "r" (d)\
263 );
264 #else
265 #define COPY3_IF_LT(x,y,a,b,c,d)\
266 if((y)<(x)){\
267 (x)=(y);\
268 (a)=(b);\
269 (c)=(d);\
270 }
271 #endif
272
273 /* avoid usage of various functions */
274 #define malloc please_use_av_malloc
275 #define free please_use_av_free
276 #define realloc please_use_av_realloc
277 #define time time_is_forbidden_due_to_security_issues
278 #define rand rand_is_forbidden_due_to_state_trashing
279 #define srand srand_is_forbidden_due_to_state_trashing
280 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
281 #define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
282 #if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
283 #define printf please_use_av_log
284 #define fprintf please_use_av_log
285 #endif
286
287 #define CHECKED_ALLOCZ(p, size)\
288 {\
289 p= av_mallocz(size);\
290 if(p==NULL && (size)!=0){\
291 perror("malloc");\
292 goto fail;\
293 }\
294 }
295
296 #ifndef HAVE_LRINTF
297 /* XXX: add ISOC specific test to avoid specific BSD testing. */
298 /* better than nothing implementation. */
299 /* btw, rintf() is existing on fbsd too -- alex */
300 static av_always_inline long int lrintf(float x)
301 {
302 #ifdef __MINGW32__
303 # ifdef ARCH_X86_32
304 int32_t i;
305 asm volatile(
306 "fistpl %0\n\t"
307 : "=m" (i) : "t" (x) : "st"
308 );
309 return i;
310 # else
311 /* XXX: incorrect, but make it compile */
312 return (int)(x + (x < 0 ? -0.5 : 0.5));
313 # endif /* ARCH_X86_32 */
314 #else
315 return (int)(rint(x));
316 #endif /* __MINGW32__ */
317 }
318 #endif /* HAVE_LRINTF */
319
320 #endif /* INTERNAL_H */