Add #include "config.h" to headers that need it.
[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 "config.h"
109 #include "intreadwrite.h"
110 #include "bswap.h"
111
112 #ifndef offsetof
113 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
114 #endif
115
116 #ifdef USE_FASTMEMCPY
117 # include "libvo/fastmemcpy.h"
118 # define memcpy(a,b,c) fast_memcpy(a,b,c)
119 #endif
120
121 // Use rip-relative addressing if compiling PIC code on x86-64.
122 #if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__DJGPP__) || \
123 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
124 # if defined(ARCH_X86_64) && defined(PIC)
125 # define MANGLE(a) "_" #a"(%%rip)"
126 # else
127 # define MANGLE(a) "_" #a
128 # endif
129 #else
130 # if defined(ARCH_X86_64) && defined(PIC)
131 # define MANGLE(a) #a"(%%rip)"
132 # elif defined(__APPLE__)
133 # define MANGLE(a) "_" #a
134 # else
135 # define MANGLE(a) #a
136 # endif
137 #endif
138
139 /* debug stuff */
140
141 /* dprintf macros */
142 #ifdef DEBUG
143 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
144 #else
145 # define dprintf(pctx, ...)
146 #endif
147
148 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
149
150 /* math */
151
152 extern const uint32_t ff_inverse[256];
153
154 #if defined(ARCH_X86)
155 # define FASTDIV(a,b) \
156 ({\
157 int ret,dmy;\
158 asm volatile(\
159 "mull %3"\
160 :"=d"(ret),"=a"(dmy)\
161 :"1"(a),"g"(ff_inverse[b])\
162 );\
163 ret;\
164 })
165 #elif defined(ARCH_ARMV4L)
166 # define FASTDIV(a,b) \
167 ({\
168 int ret,dmy;\
169 asm volatile(\
170 "umull %1, %0, %2, %3"\
171 :"=&r"(ret),"=&r"(dmy)\
172 :"r"(a),"r"(ff_inverse[b])\
173 );\
174 ret;\
175 })
176 #elif defined(CONFIG_FASTDIV)
177 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
178 #else
179 # define FASTDIV(a,b) ((a)/(b))
180 #endif
181
182 extern const uint8_t ff_sqrt_tab[256];
183
184 static inline int av_log2_16bit(unsigned int v);
185
186 static inline unsigned int ff_sqrt(unsigned int a)
187 {
188 unsigned int b;
189
190 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
191 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
192 #ifndef CONFIG_SMALL
193 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
194 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ;
195 #endif
196 else{
197 int s= av_log2_16bit(a>>16)>>1;
198 unsigned int c= a>>(s+2);
199 b= ff_sqrt_tab[c>>(s+8)];
200 b= FASTDIV(c,b) + (b<<s);
201 }
202
203 return b - (a<b*b);
204 }
205
206 #if defined(ARCH_X86)
207 #define MASK_ABS(mask, level)\
208 asm volatile(\
209 "cltd \n\t"\
210 "xorl %1, %0 \n\t"\
211 "subl %1, %0 \n\t"\
212 : "+a" (level), "=&d" (mask)\
213 );
214 #else
215 #define MASK_ABS(mask, level)\
216 mask= level>>31;\
217 level= (level^mask)-mask;
218 #endif
219
220 #ifdef HAVE_CMOV
221 #define COPY3_IF_LT(x,y,a,b,c,d)\
222 asm volatile (\
223 "cmpl %0, %3 \n\t"\
224 "cmovl %3, %0 \n\t"\
225 "cmovl %4, %1 \n\t"\
226 "cmovl %5, %2 \n\t"\
227 : "+&r" (x), "+&r" (a), "+r" (c)\
228 : "r" (y), "r" (b), "r" (d)\
229 );
230 #else
231 #define COPY3_IF_LT(x,y,a,b,c,d)\
232 if((y)<(x)){\
233 (x)=(y);\
234 (a)=(b);\
235 (c)=(d);\
236 }
237 #endif
238
239 /* avoid usage of various functions */
240 #undef malloc
241 #define malloc please_use_av_malloc
242 #undef free
243 #define free please_use_av_free
244 #undef realloc
245 #define realloc please_use_av_realloc
246 #undef time
247 #define time time_is_forbidden_due_to_security_issues
248 #undef rand
249 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
250 #undef srand
251 #define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
252 #undef random
253 #define random random_is_forbidden_due_to_state_trashing_use_av_random
254 #undef sprintf
255 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
256 #undef strcat
257 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
258 #undef exit
259 #define exit exit_is_forbidden
260 #if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
261 #undef printf
262 #define printf please_use_av_log
263 #undef fprintf
264 #define fprintf please_use_av_log
265 #undef puts
266 #define puts please_use_av_log
267 #undef perror
268 #define perror please_use_av_log_instead_of_perror
269 #endif
270
271 #define CHECKED_ALLOCZ(p, size)\
272 {\
273 p= av_mallocz(size);\
274 if(p==NULL && (size)!=0){\
275 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
276 goto fail;\
277 }\
278 }
279
280 #ifndef HAVE_LLRINT
281 static av_always_inline long long llrint(double x)
282 {
283 return rint(x);
284 }
285 #endif /* HAVE_LLRINT */
286
287 #ifndef HAVE_LRINT
288 static av_always_inline long int lrint(double x)
289 {
290 return rint(x);
291 }
292 #endif /* HAVE_LRINT */
293
294 #ifndef HAVE_LRINTF
295 static av_always_inline long int lrintf(float x)
296 {
297 return (int)(rint(x));
298 }
299 #endif /* HAVE_LRINTF */
300
301 #ifndef HAVE_ROUND
302 static av_always_inline double round(double x)
303 {
304 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
305 }
306 #endif /* HAVE_ROUND */
307
308 #ifndef HAVE_ROUNDF
309 static av_always_inline float roundf(float x)
310 {
311 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
312 }
313 #endif /* HAVE_ROUNDF */
314
315 #endif /* FFMPEG_INTERNAL_H */