Statistics
| Branch: | Revision:

ffmpeg / libavutil / internal.h @ 5ce6934e

History | View | Annotate | Download (7.94 KB)

1 04d7f601 Diego Biurrun
/*
2
 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3
 *
4 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7 04d7f601 Diego Biurrun
 * modify it under the terms of the GNU Lesser General Public
8
 * License as published by the Free Software Foundation; either
9 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
10 04d7f601 Diego Biurrun
 *
11 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
12 04d7f601 Diego Biurrun
 * 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 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
18 04d7f601 Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
20
21 05020c89 Reimar Döffinger
/**
22 bad5537e Diego Biurrun
 * @file libavutil/internal.h
23 89c9ff50 Diego Biurrun
 * common internal API header
24 05020c89 Reimar Döffinger
 */
25
26 98790382 Stefano Sabatini
#ifndef AVUTIL_INTERNAL_H
27
#define AVUTIL_INTERNAL_H
28 05020c89 Reimar Döffinger
29 318049b8 Måns Rullgård
#if !defined(DEBUG) && !defined(NDEBUG)
30
#    define NDEBUG
31
#endif
32
33 ed0fd852 Diego Biurrun
#include <limits.h>
34 99545457 Måns Rullgård
#include <stdint.h>
35 318049b8 Måns Rullgård
#include <stddef.h>
36
#include <assert.h>
37 dbef3f46 Diego Biurrun
#include "config.h"
38 52476c1b Carl Eugen Hoyos
#include "common.h"
39 9d52d54d Diego Biurrun
#include "mem.h"
40 2f5421d5 Aurelien Jacobs
#include "timer.h"
41 99545457 Måns Rullgård
42 5e4c7ca2 Ramiro Polla
#ifndef attribute_align_arg
43 06be9d9d Carl Eugen Hoyos
#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2)
44 5e4c7ca2 Ramiro Polla
#    define attribute_align_arg __attribute__((force_align_arg_pointer))
45
#else
46
#    define attribute_align_arg
47
#endif
48
#endif
49
50 5403f857 Måns Rullgård
#ifndef attribute_used
51 52476c1b Carl Eugen Hoyos
#if AV_GCC_VERSION_AT_LEAST(3,1)
52 5403f857 Måns Rullgård
#    define attribute_used __attribute__((used))
53
#else
54
#    define attribute_used
55
#endif
56
#endif
57
58 cd107896 Måns Rullgård
#ifndef INT16_MIN
59 ee155011 Diego Biurrun
#define INT16_MIN       (-0x7fff - 1)
60 cd107896 Måns Rullgård
#endif
61
62
#ifndef INT16_MAX
63
#define INT16_MAX       0x7fff
64
#endif
65
66
#ifndef INT32_MIN
67 ee155011 Diego Biurrun
#define INT32_MIN       (-0x7fffffff - 1)
68 cd107896 Måns Rullgård
#endif
69
70
#ifndef INT32_MAX
71
#define INT32_MAX       0x7fffffff
72
#endif
73
74
#ifndef UINT32_MAX
75
#define UINT32_MAX      0xffffffff
76
#endif
77
78
#ifndef INT64_MIN
79 ee155011 Diego Biurrun
#define INT64_MIN       (-0x7fffffffffffffffLL - 1)
80 cd107896 Måns Rullgård
#endif
81
82
#ifndef INT64_MAX
83 8da9266c Måns Rullgård
#define INT64_MAX INT64_C(9223372036854775807)
84 cd107896 Måns Rullgård
#endif
85
86
#ifndef UINT64_MAX
87 8da9266c Måns Rullgård
#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
88 cd107896 Måns Rullgård
#endif
89
90
#ifndef INT_BIT
91 28499cc8 Måns Rullgård
#    define INT_BIT (CHAR_BIT * sizeof(int))
92 cd107896 Måns Rullgård
#endif
93
94 05020c89 Reimar Döffinger
#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
95
#    define PIC
96
#endif
97
98
#ifndef offsetof
99 ee155011 Diego Biurrun
#    define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
100 05020c89 Reimar Döffinger
#endif
101
102 7d9beec7 Ramiro Polla
/* Use to export labels from asm. */
103
#define LABEL_MANGLE(a) EXTERN_PREFIX #a
104
105 05020c89 Reimar Döffinger
// Use rip-relative addressing if compiling PIC code on x86-64.
106 b250f9c6 Aurelien Jacobs
#if ARCH_X86_64 && defined(PIC)
107 df22c35d Alexander Strange
#    define LOCAL_MANGLE(a) #a "(%%rip)"
108 edfd6975 Diego Biurrun
#else
109 df22c35d Alexander Strange
#    define LOCAL_MANGLE(a) #a
110 635eb0cc Måns Rullgård
#endif
111 05020c89 Reimar Döffinger
112 df22c35d Alexander Strange
#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
113
114 05020c89 Reimar Döffinger
/* debug stuff */
115
116
/* dprintf macros */
117 635eb0cc Måns Rullgård
#ifdef DEBUG
118 318c5e05 Michel Bardiaux
#    define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
119 635eb0cc Måns Rullgård
#else
120 318c5e05 Michel Bardiaux
#    define dprintf(pctx, ...)
121 635eb0cc Måns Rullgård
#endif
122 05020c89 Reimar Döffinger
123 635eb0cc Måns Rullgård
#define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
124 05020c89 Reimar Döffinger
125 7e5f82dc Måns Rullgård
/* math */
126
127 36cd3069 Måns Rullgård
extern const uint32_t ff_inverse[256];
128 05020c89 Reimar Döffinger
129 b250f9c6 Aurelien Jacobs
#if ARCH_X86
130 05020c89 Reimar Döffinger
#    define FASTDIV(a,b) \
131
    ({\
132 ee155011 Diego Biurrun
        int ret, dmy;\
133 be449fca Diego Pettenò
        __asm__ volatile(\
134 05020c89 Reimar Döffinger
            "mull %3"\
135 ee155011 Diego Biurrun
            :"=d"(ret), "=a"(dmy)\
136
            :"1"(a), "g"(ff_inverse[b])\
137 05020c89 Reimar Döffinger
            );\
138
        ret;\
139
    })
140 35690321 Måns Rullgård
#elif HAVE_ARMV6 && HAVE_INLINE_ASM
141 6651ce17 Måns Rullgård
static inline av_const int FASTDIV(int a, int b)
142
{
143 b98f10c0 Måns Rullgård
    int r, t;
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));
149 6651ce17 Måns Rullgård
    return r;
150
}
151 35690321 Måns Rullgård
#elif ARCH_ARM && HAVE_INLINE_ASM
152 f8c5adaf Måns Rullgård
static inline av_const int FASTDIV(int a, int b)
153
{
154
    int r, t;
155 ee155011 Diego Biurrun
    __asm__ volatile("umull %1, %0, %2, %3"
156
                     : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
157 f8c5adaf Måns Rullgård
    return r;
158
}
159 b250f9c6 Aurelien Jacobs
#elif CONFIG_FASTDIV
160 ee155011 Diego Biurrun
#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32))
161 05020c89 Reimar Döffinger
#else
162 ee155011 Diego Biurrun
#    define FASTDIV(a,b)   ((a) / (b))
163 05020c89 Reimar Döffinger
#endif
164
165 c448a096 Michael Niedermayer
extern const uint8_t ff_sqrt_tab[256];
166 05020c89 Reimar Döffinger
167 85074d3c Zuxy Meng
static inline av_const unsigned int ff_sqrt(unsigned int a)
168 05020c89 Reimar Döffinger
{
169 c448a096 Michael Niedermayer
    unsigned int b;
170
171 ee155011 Diego Biurrun
    if (a < 255) return (ff_sqrt_tab[a + 1] - 1) >> 4;
172
    else if (a < (1 << 12)) b = ff_sqrt_tab[a >> 4] >> 2;
173 b250f9c6 Aurelien Jacobs
#if !CONFIG_SMALL
174 ee155011 Diego Biurrun
    else if (a < (1 << 14)) b = ff_sqrt_tab[a >> 6] >> 1;
175
    else if (a < (1 << 16)) b = ff_sqrt_tab[a >> 8]   ;
176 c448a096 Michael Niedermayer
#endif
177 ee155011 Diego Biurrun
    else {
178
        int s = av_log2_16bit(a >> 16) >> 1;
179
        unsigned int c = a >> (s + 2);
180
        b = ff_sqrt_tab[c >> (s + 8)];
181
        b = FASTDIV(c,b) + (b << s);
182 05020c89 Reimar Döffinger
    }
183 c448a096 Michael Niedermayer
184 ee155011 Diego Biurrun
    return b - (a < b * b);
185 05020c89 Reimar Döffinger
}
186
187 b250f9c6 Aurelien Jacobs
#if ARCH_X86
188 05020c89 Reimar Döffinger
#define MASK_ABS(mask, level)\
189 be449fca Diego Pettenò
            __asm__ volatile(\
190 7e14b808 Reimar Döffinger
                "cltd                   \n\t"\
191 05020c89 Reimar Döffinger
                "xorl %1, %0            \n\t"\
192
                "subl %1, %0            \n\t"\
193
                : "+a" (level), "=&d" (mask)\
194
            );
195
#else
196
#define MASK_ABS(mask, level)\
197 ee155011 Diego Biurrun
            mask  = level >> 31;\
198
            level = (level ^ mask) - mask;
199 05020c89 Reimar Döffinger
#endif
200
201 b250f9c6 Aurelien Jacobs
#if HAVE_CMOV
202 ee155011 Diego Biurrun
#define COPY3_IF_LT(x, y, a, b, c, d)\
203
__asm__ volatile(\
204
    "cmpl  %0, %3       \n\t"\
205 05020c89 Reimar Döffinger
    "cmovl %3, %0       \n\t"\
206
    "cmovl %4, %1       \n\t"\
207
    "cmovl %5, %2       \n\t"\
208 8c2e2040 Ramiro Polla
    : "+&r" (x), "+&r" (a), "+r" (c)\
209 05020c89 Reimar Döffinger
    : "r" (y), "r" (b), "r" (d)\
210
);
211
#else
212 ee155011 Diego Biurrun
#define COPY3_IF_LT(x, y, a, b, c, d)\
213
if ((y) < (x)) {\
214
    (x) = (y);\
215
    (a) = (b);\
216
    (c) = (d);\
217 05020c89 Reimar Döffinger
}
218
#endif
219
220 7d685b48 Diego Biurrun
/* avoid usage of dangerous/inappropriate system functions */
221 84662c01 Måns Rullgård
#undef  malloc
222 05020c89 Reimar Döffinger
#define malloc please_use_av_malloc
223 84662c01 Måns Rullgård
#undef  free
224 05020c89 Reimar Döffinger
#define free please_use_av_free
225 84662c01 Måns Rullgård
#undef  realloc
226 05020c89 Reimar Döffinger
#define realloc please_use_av_realloc
227 84662c01 Måns Rullgård
#undef  time
228 05020c89 Reimar Döffinger
#define time time_is_forbidden_due_to_security_issues
229 84662c01 Måns Rullgård
#undef  rand
230 9f5da4d1 Diego Biurrun
#define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
231 84662c01 Måns Rullgård
#undef  srand
232 9f5da4d1 Diego Biurrun
#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
233 84662c01 Måns Rullgård
#undef  random
234 9f5da4d1 Diego Biurrun
#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
235 84662c01 Måns Rullgård
#undef  sprintf
236 05020c89 Reimar Döffinger
#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
237 84662c01 Måns Rullgård
#undef  strcat
238 272605c7 Reimar Döffinger
#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
239 84662c01 Måns Rullgård
#undef  exit
240 c367d067 Michael Niedermayer
#define exit exit_is_forbidden
241 6123abad Stefano Sabatini
#ifndef LIBAVFORMAT_BUILD
242 84662c01 Måns Rullgård
#undef  printf
243 b58f29a1 Diego Biurrun
#define printf please_use_av_log_instead_of_printf
244 84662c01 Måns Rullgård
#undef  fprintf
245 b58f29a1 Diego Biurrun
#define fprintf please_use_av_log_instead_of_fprintf
246 59ec6991 Diego Biurrun
#undef  puts
247 b58f29a1 Diego Biurrun
#define puts please_use_av_log_instead_of_puts
248 c5a2fe8f Luca Abeni
#undef  perror
249
#define perror please_use_av_log_instead_of_perror
250 05020c89 Reimar Döffinger
#endif
251
252 e48a0966 Ramiro Polla
#define CHECKED_ALLOC(p, size)\
253
{\
254 ee155011 Diego Biurrun
    p = av_malloc(size);\
255
    if (p == NULL && (size) != 0) {\
256 5ce6934e Ramiro Polla
        av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.\n");\
257 e48a0966 Ramiro Polla
        goto fail;\
258
    }\
259
}
260
261 05020c89 Reimar Döffinger
#define CHECKED_ALLOCZ(p, size)\
262
{\
263 ee155011 Diego Biurrun
    p = av_mallocz(size);\
264
    if (p == NULL && (size) != 0) {\
265 5ce6934e Ramiro Polla
        av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.\n");\
266 05020c89 Reimar Döffinger
        goto fail;\
267
    }\
268
}
269
270 b250f9c6 Aurelien Jacobs
#if !HAVE_LLRINT
271 85074d3c Zuxy Meng
static av_always_inline av_const long long llrint(double x)
272 a33cab3a Michael Kostylev
{
273
    return rint(x);
274
}
275
#endif /* HAVE_LLRINT */
276 291fd18a Alex Converse
277
#if !HAVE_LOG2
278
static av_always_inline av_const double log2(double x)
279
{
280
    return log(x) * 1.44269504088896340736;
281
}
282
#endif /* HAVE_LOG2 */
283 a33cab3a Michael Kostylev
284 b250f9c6 Aurelien Jacobs
#if !HAVE_LRINT
285 85074d3c Zuxy Meng
static av_always_inline av_const long int lrint(double x)
286 a33cab3a Michael Kostylev
{
287
    return rint(x);
288
}
289
#endif /* HAVE_LRINT */
290
291 b250f9c6 Aurelien Jacobs
#if !HAVE_LRINTF
292 85074d3c Zuxy Meng
static av_always_inline av_const long int lrintf(float x)
293 05020c89 Reimar Döffinger
{
294
    return (int)(rint(x));
295
}
296
#endif /* HAVE_LRINTF */
297
298 b250f9c6 Aurelien Jacobs
#if !HAVE_ROUND
299 85074d3c Zuxy Meng
static av_always_inline av_const double round(double x)
300 a33cab3a Michael Kostylev
{
301
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
302
}
303
#endif /* HAVE_ROUND */
304
305 b250f9c6 Aurelien Jacobs
#if !HAVE_ROUNDF
306 85074d3c Zuxy Meng
static av_always_inline av_const float roundf(float x)
307 a33cab3a Michael Kostylev
{
308
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
309
}
310
#endif /* HAVE_ROUNDF */
311
312 b250f9c6 Aurelien Jacobs
#if !HAVE_TRUNCF
313 7b04b8a0 Michael Kostylev
static av_always_inline av_const float truncf(float x)
314
{
315
    return (x > 0) ? floor(x) : ceil(x);
316
}
317
#endif /* HAVE_TRUNCF */
318
319 d80a7fe5 Aurelien Jacobs
/**
320 bfe3676f Diego Biurrun
 * Returns NULL if CONFIG_SMALL is true, otherwise the argument
321
 * without modification. Used to disable the definition of strings
322 d80a7fe5 Aurelien Jacobs
 * (for example AVCodec long_names).
323
 */
324
#if CONFIG_SMALL
325
#   define NULL_IF_CONFIG_SMALL(x) NULL
326
#else
327
#   define NULL_IF_CONFIG_SMALL(x) x
328
#endif
329
330 98790382 Stefano Sabatini
#endif /* AVUTIL_INTERNAL_H */