Drop unnecessary intreadwrite.h and bswap.h #includes.
[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 AVUTIL_INTERNAL_H
27 #define AVUTIL_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 #include "common.h"
37
38 #ifndef attribute_align_arg
39 #if (!defined(__ICC) || __ICC > 1100) && AV_GCC_VERSION_AT_LEAST(4,2)
40 # define attribute_align_arg __attribute__((force_align_arg_pointer))
41 #else
42 # define attribute_align_arg
43 #endif
44 #endif
45
46 #ifndef attribute_used
47 #if AV_GCC_VERSION_AT_LEAST(3,1)
48 # define attribute_used __attribute__((used))
49 #else
50 # define attribute_used
51 #endif
52 #endif
53
54 #ifndef INT16_MIN
55 #define INT16_MIN (-0x7fff-1)
56 #endif
57
58 #ifndef INT16_MAX
59 #define INT16_MAX 0x7fff
60 #endif
61
62 #ifndef INT32_MIN
63 #define INT32_MIN (-0x7fffffff-1)
64 #endif
65
66 #ifndef INT32_MAX
67 #define INT32_MAX 0x7fffffff
68 #endif
69
70 #ifndef UINT32_MAX
71 #define UINT32_MAX 0xffffffff
72 #endif
73
74 #ifndef INT64_MIN
75 #define INT64_MIN (-0x7fffffffffffffffLL-1)
76 #endif
77
78 #ifndef INT64_MAX
79 #define INT64_MAX INT64_C(9223372036854775807)
80 #endif
81
82 #ifndef UINT64_MAX
83 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
84 #endif
85
86 #ifndef INT_BIT
87 # if INT_MAX != 2147483647
88 # define INT_BIT 64
89 # else
90 # define INT_BIT 32
91 # endif
92 #endif
93
94 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
95 # define PIC
96 #endif
97
98 #include "config.h"
99
100 #ifndef offsetof
101 # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
102 #endif
103
104 // Use rip-relative addressing if compiling PIC code on x86-64.
105 #if defined(ARCH_X86_64) && defined(PIC)
106 # define LOCAL_MANGLE(a) #a "(%%rip)"
107 #else
108 # define LOCAL_MANGLE(a) #a
109 #endif
110
111 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
112
113 /* debug stuff */
114
115 /* dprintf macros */
116 #ifdef DEBUG
117 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
118 #else
119 # define dprintf(pctx, ...)
120 #endif
121
122 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
123
124 /* math */
125
126 extern const uint32_t ff_inverse[256];
127
128 #if defined(ARCH_X86)
129 # define FASTDIV(a,b) \
130 ({\
131 int ret,dmy;\
132 __asm__ volatile(\
133 "mull %3"\
134 :"=d"(ret),"=a"(dmy)\
135 :"1"(a),"g"(ff_inverse[b])\
136 );\
137 ret;\
138 })
139 #elif defined(HAVE_ARMV6)
140 static inline av_const int FASTDIV(int a, int b)
141 {
142 int r, t;
143 __asm__ volatile("cmp %3, #2 \n\t"
144 "ldr %1, [%4, %3, lsl #2] \n\t"
145 "lsrle %0, %2, #1 \n\t"
146 "smmulgt %0, %1, %2 \n\t"
147 : "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse));
148 return r;
149 }
150 #elif defined(ARCH_ARM)
151 static inline av_const int FASTDIV(int a, int b)
152 {
153 int r, t;
154 __asm__ volatile ("umull %1, %0, %2, %3"
155 : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
156 return r;
157 }
158 #elif defined(CONFIG_FASTDIV)
159 # define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
160 #else
161 # define FASTDIV(a,b) ((a)/(b))
162 #endif
163
164 extern const uint8_t ff_sqrt_tab[256];
165
166 static inline int av_log2_16bit(unsigned int v);
167
168 static inline av_const unsigned int ff_sqrt(unsigned int a)
169 {
170 unsigned int b;
171
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;
174 #ifndef CONFIG_SMALL
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 ] ;
177 #endif
178 else{
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);
183 }
184
185 return b - (a<b*b);
186 }
187
188 #if defined(ARCH_X86)
189 #define MASK_ABS(mask, level)\
190 __asm__ volatile(\
191 "cltd \n\t"\
192 "xorl %1, %0 \n\t"\
193 "subl %1, %0 \n\t"\
194 : "+a" (level), "=&d" (mask)\
195 );
196 #else
197 #define MASK_ABS(mask, level)\
198 mask= level>>31;\
199 level= (level^mask)-mask;
200 #endif
201
202 #ifdef HAVE_CMOV
203 #define COPY3_IF_LT(x,y,a,b,c,d)\
204 __asm__ volatile (\
205 "cmpl %0, %3 \n\t"\
206 "cmovl %3, %0 \n\t"\
207 "cmovl %4, %1 \n\t"\
208 "cmovl %5, %2 \n\t"\
209 : "+&r" (x), "+&r" (a), "+r" (c)\
210 : "r" (y), "r" (b), "r" (d)\
211 );
212 #else
213 #define COPY3_IF_LT(x,y,a,b,c,d)\
214 if((y)<(x)){\
215 (x)=(y);\
216 (a)=(b);\
217 (c)=(d);\
218 }
219 #endif
220
221 /* avoid usage of various functions */
222 #undef malloc
223 #define malloc please_use_av_malloc
224 #undef free
225 #define free please_use_av_free
226 #undef realloc
227 #define realloc please_use_av_realloc
228 #undef time
229 #define time time_is_forbidden_due_to_security_issues
230 #undef rand
231 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
232 #undef srand
233 #define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
234 #undef random
235 #define random random_is_forbidden_due_to_state_trashing_use_av_random
236 #undef sprintf
237 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
238 #undef strcat
239 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
240 #undef exit
241 #define exit exit_is_forbidden
242 #ifndef LIBAVFORMAT_BUILD
243 #undef printf
244 #define printf please_use_av_log
245 #undef fprintf
246 #define fprintf please_use_av_log
247 #undef puts
248 #define puts please_use_av_log
249 #undef perror
250 #define perror please_use_av_log_instead_of_perror
251 #endif
252
253 #define CHECKED_ALLOCZ(p, size)\
254 {\
255 p= av_mallocz(size);\
256 if(p==NULL && (size)!=0){\
257 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
258 goto fail;\
259 }\
260 }
261
262 #ifndef HAVE_LLRINT
263 static av_always_inline av_const long long llrint(double x)
264 {
265 return rint(x);
266 }
267 #endif /* HAVE_LLRINT */
268
269 #ifndef HAVE_LRINT
270 static av_always_inline av_const long int lrint(double x)
271 {
272 return rint(x);
273 }
274 #endif /* HAVE_LRINT */
275
276 #ifndef HAVE_LRINTF
277 static av_always_inline av_const long int lrintf(float x)
278 {
279 return (int)(rint(x));
280 }
281 #endif /* HAVE_LRINTF */
282
283 #ifndef HAVE_ROUND
284 static av_always_inline av_const double round(double x)
285 {
286 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
287 }
288 #endif /* HAVE_ROUND */
289
290 #ifndef HAVE_ROUNDF
291 static av_always_inline av_const float roundf(float x)
292 {
293 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
294 }
295 #endif /* HAVE_ROUNDF */
296
297 #endif /* AVUTIL_INTERNAL_H */