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 FFMPEG_INTERNAL_H
27 #define FFMPEG_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
53 /* Use Apple-specific AltiVec syntax for vector declarations when necessary. */
61 #define M_PI 3.14159265358979323846
65 #define INT16_MIN (-0x7fff-1)
69 #define INT16_MAX 0x7fff
73 #define INT32_MIN (-0x7fffffff-1)
77 #define INT32_MAX 0x7fffffff
81 #define UINT32_MAX 0xffffffff
85 #define INT64_MIN (-0x7fffffffffffffffLL-1)
89 #define INT64_MAX INT64_C(9223372036854775807)
93 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
97 # if INT_MAX != 2147483647
104 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
109 #include "intreadwrite.h"
113 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
116 #ifdef USE_FASTMEMCPY
117 # include "libvo/fastmemcpy.h"
118 # define memcpy(a,b,c) fast_memcpy(a,b,c)
121 // Use rip-relative addressing if compiling PIC code on x86-64.
122 #if defined(ARCH_X86_64) && defined(PIC)
123 # define MANGLE(a) EXTERN_PREFIX #a"(%%rip)"
125 # define MANGLE(a) EXTERN_PREFIX #a
132 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
134 # define dprintf(pctx, ...)
137 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
141 extern const uint32_t ff_inverse[256];
143 #if defined(ARCH_X86)
144 # define FASTDIV(a,b) \
149 :"=d"(ret),"=a"(dmy)\
150 :"1"(a),"g"(ff_inverse[b])\
154 #elif defined(ARCH_ARMV4L)
155 # define FASTDIV(a,b) \
159 "umull %1, %0, %2, %3"\
160 :"=&r"(ret),"=&r"(dmy)\
161 :"r"(a),"r"(ff_inverse[b])\
165 #elif defined(CONFIG_FASTDIV)
166 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
168 # define FASTDIV(a,b) ((a)/(b))
171 extern const uint8_t ff_sqrt_tab[256];
173 static inline int av_log2_16bit(unsigned int v);
175 static inline av_const unsigned int ff_sqrt(unsigned int a)
179 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
180 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
182 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
183 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ;
186 int s= av_log2_16bit(a>>16)>>1;
187 unsigned int c= a>>(s+2);
188 b= ff_sqrt_tab[c>>(s+8)];
189 b= FASTDIV(c,b) + (b<<s);
195 #if defined(ARCH_X86)
196 #define MASK_ABS(mask, level)\
201 : "+a" (level), "=&d" (mask)\
204 #define MASK_ABS(mask, level)\
206 level= (level^mask)-mask;
210 #define COPY3_IF_LT(x,y,a,b,c,d)\
216 : "+&r" (x), "+&r" (a), "+r" (c)\
217 : "r" (y), "r" (b), "r" (d)\
220 #define COPY3_IF_LT(x,y,a,b,c,d)\
228 /* avoid usage of various functions */
230 #define malloc please_use_av_malloc
232 #define free please_use_av_free
234 #define realloc please_use_av_realloc
236 #define time time_is_forbidden_due_to_security_issues
238 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
240 #define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
242 #define random random_is_forbidden_due_to_state_trashing_use_av_random
244 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
246 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
248 #define exit exit_is_forbidden
249 #if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
251 #define printf please_use_av_log
253 #define fprintf please_use_av_log
255 #define puts please_use_av_log
257 #define perror please_use_av_log_instead_of_perror
260 #define CHECKED_ALLOCZ(p, size)\
262 p= av_mallocz(size);\
263 if(p==NULL && (size)!=0){\
264 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
270 static av_always_inline av_const long long llrint(double x)
274 #endif /* HAVE_LLRINT */
277 static av_always_inline av_const long int lrint(double x)
281 #endif /* HAVE_LRINT */
284 static av_always_inline av_const long int lrintf(float x)
286 return (int)(rint(x));
288 #endif /* HAVE_LRINTF */
291 static av_always_inline av_const double round(double x)
293 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
295 #endif /* HAVE_ROUND */
298 static av_always_inline av_const float roundf(float x)
300 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
302 #endif /* HAVE_ROUNDF */
304 #endif /* FFMPEG_INTERNAL_H */