2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
23 * common internal API header
26 #ifndef AVUTIL_INTERNAL_H
27 #define AVUTIL_INTERNAL_H
29 #if !defined(DEBUG) && !defined(NDEBUG)
40 #ifndef attribute_align_arg
41 #if (!defined(__ICC) || __ICC > 1100) && AV_GCC_VERSION_AT_LEAST(4,2)
42 # define attribute_align_arg __attribute__((force_align_arg_pointer))
44 # define attribute_align_arg
48 #ifndef attribute_used
49 #if AV_GCC_VERSION_AT_LEAST(3,1)
50 # define attribute_used __attribute__((used))
52 # define attribute_used
57 #define INT16_MIN (-0x7fff-1)
61 #define INT16_MAX 0x7fff
65 #define INT32_MIN (-0x7fffffff-1)
69 #define INT32_MAX 0x7fffffff
73 #define UINT32_MAX 0xffffffff
77 #define INT64_MIN (-0x7fffffffffffffffLL-1)
81 #define INT64_MAX INT64_C(9223372036854775807)
85 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
89 # if INT_MAX != 2147483647
96 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
103 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
106 // Use rip-relative addressing if compiling PIC code on x86-64.
107 #if ARCH_X86_64 && defined(PIC)
108 # define LOCAL_MANGLE(a) #a "(%%rip)"
110 # define LOCAL_MANGLE(a) #a
113 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
119 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
121 # define dprintf(pctx, ...)
124 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
128 extern const uint32_t ff_inverse[256];
131 # define FASTDIV(a,b) \
136 :"=d"(ret),"=a"(dmy)\
137 :"1"(a),"g"(ff_inverse[b])\
142 static inline av_const int FASTDIV(int a, int b)
145 __asm__ volatile("cmp %3, #2 \n\t"
146 "ldr %1, [%4, %3, lsl #2] \n\t"
147 "lsrle %0, %2, #1 \n\t"
148 "smmulgt %0, %1, %2 \n\t"
149 : "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse));
153 static inline av_const int FASTDIV(int a, int b)
156 __asm__ volatile ("umull %1, %0, %2, %3"
157 : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
161 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
163 # define FASTDIV(a,b) ((a)/(b))
166 extern const uint8_t ff_sqrt_tab[256];
168 static inline av_const unsigned int ff_sqrt(unsigned int a)
172 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
173 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
175 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
176 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ;
179 int s= av_log2_16bit(a>>16)>>1;
180 unsigned int c= a>>(s+2);
181 b= ff_sqrt_tab[c>>(s+8)];
182 b= FASTDIV(c,b) + (b<<s);
189 #define MASK_ABS(mask, level)\
194 : "+a" (level), "=&d" (mask)\
197 #define MASK_ABS(mask, level)\
199 level= (level^mask)-mask;
203 #define COPY3_IF_LT(x,y,a,b,c,d)\
209 : "+&r" (x), "+&r" (a), "+r" (c)\
210 : "r" (y), "r" (b), "r" (d)\
213 #define COPY3_IF_LT(x,y,a,b,c,d)\
221 /* avoid usage of various functions */
223 #define malloc please_use_av_malloc
225 #define free please_use_av_free
227 #define realloc please_use_av_realloc
229 #define time time_is_forbidden_due_to_security_issues
231 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
233 #define srand srand_is_forbidden_due_to_state_trashing_use_av_random_init
235 #define random random_is_forbidden_due_to_state_trashing_use_av_random
237 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
239 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
241 #define exit exit_is_forbidden
242 #ifndef LIBAVFORMAT_BUILD
244 #define printf please_use_av_log_instead_of_printf
246 #define fprintf please_use_av_log_instead_of_fprintf
248 #define puts please_use_av_log_instead_of_puts
250 #define perror please_use_av_log_instead_of_perror
253 #define CHECKED_ALLOCZ(p, size)\
255 p= av_mallocz(size);\
256 if(p==NULL && (size)!=0){\
257 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
262 #if defined(__ICC) || defined(__SUNPRO_C)
263 #define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
264 #define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v
265 #elif defined(__GNUC__)
266 #define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
267 #define DECLARE_ASM_CONST(n,t,v) static const t v attribute_used __attribute__ ((aligned (n)))
268 #elif defined(_MSC_VER)
269 #define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
270 #define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v
271 #elif HAVE_INLINE_ASM
272 #error The asm code needs alignment, but we do not know how to do it for this compiler.
274 #define DECLARE_ALIGNED(n,t,v) t v
275 #define DECLARE_ASM_CONST(n,t,v) static const t v
280 static av_always_inline av_const long long llrint(double x)
284 #endif /* HAVE_LLRINT */
287 static av_always_inline av_const long int lrint(double x)
291 #endif /* HAVE_LRINT */
294 static av_always_inline av_const long int lrintf(float x)
296 return (int)(rint(x));
298 #endif /* HAVE_LRINTF */
301 static av_always_inline av_const double round(double x)
303 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
305 #endif /* HAVE_ROUND */
308 static av_always_inline av_const float roundf(float x)
310 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
312 #endif /* HAVE_ROUNDF */
315 static av_always_inline av_const float truncf(float x)
317 return (x > 0) ? floor(x) : ceil(x);
319 #endif /* HAVE_TRUNCF */
322 * Returns NULL if CONFIG_SMALL is true, otherwise the argument
323 * without modification. Used to disable the definition of strings
324 * (for example AVCodec long_names).
327 # define NULL_IF_CONFIG_SMALL(x) NULL
329 # define NULL_IF_CONFIG_SMALL(x) x
332 #endif /* AVUTIL_INTERNAL_H */