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