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)
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))
41 # define attribute_align_arg
45 #ifndef attribute_used
46 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
47 # define attribute_used __attribute__((used))
49 # define attribute_used
54 #define INT16_MIN (-0x7fff-1)
58 #define INT16_MAX 0x7fff
62 #define INT32_MIN (-0x7fffffff-1)
66 #define INT32_MAX 0x7fffffff
70 #define UINT32_MAX 0xffffffff
74 #define INT64_MIN (-0x7fffffffffffffffLL-1)
78 #define INT64_MAX INT64_C(9223372036854775807)
82 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
86 # if INT_MAX != 2147483647
93 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
98 #include "intreadwrite.h"
102 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
105 // Use rip-relative addressing if compiling PIC code on x86-64.
106 #if defined(ARCH_X86_64) && defined(PIC)
107 # define LOCAL_MANGLE(a) #a "(%%rip)"
109 # define LOCAL_MANGLE(a) #a
112 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
118 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
120 # define dprintf(pctx, ...)
123 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
127 extern const uint32_t ff_inverse[256];
129 #if defined(ARCH_X86)
130 # define FASTDIV(a,b) \
135 :"=d"(ret),"=a"(dmy)\
136 :"1"(a),"g"(ff_inverse[b])\
140 #elif defined(HAVE_ARMV6)
141 static inline av_const int FASTDIV(int a, int b)
144 __asm__ volatile("cmp %3, #2 \n\t"
145 "ldr %1, [%4, %3, lsl #2] \n\t"
146 "lsrle %0, %2, #1 \n\t"
147 "smmulgt %0, %1, %2 \n\t"
148 : "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse));
151 #elif defined(ARCH_ARMV4L)
152 # define FASTDIV(a,b) \
156 "umull %1, %0, %2, %3"\
157 :"=&r"(ret),"=&r"(dmy)\
158 :"r"(a),"r"(ff_inverse[b])\
162 #elif defined(CONFIG_FASTDIV)
163 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
165 # define FASTDIV(a,b) ((a)/(b))
168 extern const uint8_t ff_sqrt_tab[256];
170 static inline int av_log2_16bit(unsigned int v);
172 static inline av_const unsigned int ff_sqrt(unsigned int a)
176 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
177 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
179 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
180 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ;
183 int s= av_log2_16bit(a>>16)>>1;
184 unsigned int c= a>>(s+2);
185 b= ff_sqrt_tab[c>>(s+8)];
186 b= FASTDIV(c,b) + (b<<s);
192 #if defined(ARCH_X86)
193 #define MASK_ABS(mask, level)\
198 : "+a" (level), "=&d" (mask)\
201 #define MASK_ABS(mask, level)\
203 level= (level^mask)-mask;
207 #define COPY3_IF_LT(x,y,a,b,c,d)\
213 : "+&r" (x), "+&r" (a), "+r" (c)\
214 : "r" (y), "r" (b), "r" (d)\
217 #define COPY3_IF_LT(x,y,a,b,c,d)\
225 /* avoid usage of various functions */
227 #define malloc please_use_av_malloc
229 #define free please_use_av_free
231 #define realloc please_use_av_realloc
233 #define time time_is_forbidden_due_to_security_issues
235 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
237 #define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
239 #define random random_is_forbidden_due_to_state_trashing_use_av_random
241 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
243 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
245 #define exit exit_is_forbidden
246 #ifndef LIBAVFORMAT_BUILD
248 #define printf please_use_av_log
250 #define fprintf please_use_av_log
252 #define puts please_use_av_log
254 #define perror please_use_av_log_instead_of_perror
257 #define CHECKED_ALLOCZ(p, size)\
259 p= av_mallocz(size);\
260 if(p==NULL && (size)!=0){\
261 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
267 static av_always_inline av_const long long llrint(double x)
271 #endif /* HAVE_LLRINT */
274 static av_always_inline av_const long int lrint(double x)
278 #endif /* HAVE_LRINT */
281 static av_always_inline av_const long int lrintf(float x)
283 return (int)(rint(x));
285 #endif /* HAVE_LRINTF */
288 static av_always_inline av_const double round(double x)
290 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
292 #endif /* HAVE_ROUND */
295 static av_always_inline av_const float roundf(float x)
297 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
299 #endif /* HAVE_ROUNDF */
301 #endif /* AVUTIL_INTERNAL_H */