Statistics
| Branch: | Revision:

ffmpeg / libavutil / internal.h @ 7d9beec7

History | View | Annotate | Download (8.28 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 af4c0bcb Carl Eugen Hoyos
#if (!defined(__ICC) || __ICC > 1100) && 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
#define INT16_MIN       (-0x7fff-1)
60
#endif
61
62
#ifndef INT16_MAX
63
#define INT16_MAX       0x7fff
64
#endif
65
66
#ifndef INT32_MIN
67
#define INT32_MIN       (-0x7fffffff-1)
68
#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
#define INT64_MIN       (-0x7fffffffffffffffLL-1)
80
#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 635eb0cc Måns Rullgård
#    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
        int ret,dmy;\
133 be449fca Diego Pettenò
        __asm__ volatile(\
134 05020c89 Reimar Döffinger
            "mull %3"\
135
            :"=d"(ret),"=a"(dmy)\
136 36cd3069 Måns Rullgård
            :"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
    __asm__ volatile ("umull %1, %0, %2, %3"
156
                      : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
157
    return r;
158
}
159 b250f9c6 Aurelien Jacobs
#elif CONFIG_FASTDIV
160 36cd3069 Måns Rullgård
#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
161 05020c89 Reimar Döffinger
#else
162
#    define FASTDIV(a,b)   ((a)/(b))
163
#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
    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 c448a096 Michael Niedermayer
    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
#endif
177
    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
    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
            mask= level>>31;\
198
            level= (level^mask)-mask;
199
#endif
200
201 b250f9c6 Aurelien Jacobs
#if HAVE_CMOV
202 05020c89 Reimar Döffinger
#define COPY3_IF_LT(x,y,a,b,c,d)\
203 be449fca Diego Pettenò
__asm__ volatile (\
204 05020c89 Reimar Döffinger
    "cmpl %0, %3        \n\t"\
205
    "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
#define COPY3_IF_LT(x,y,a,b,c,d)\
213
if((y)<(x)){\
214
     (x)=(y);\
215
     (a)=(b);\
216
     (c)=(d);\
217
}
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
#define CHECKED_ALLOCZ(p, size)\
253
{\
254
    p= av_mallocz(size);\
255
    if(p==NULL && (size)!=0){\
256 7f0cd6a5 Luca Abeni
        av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
257 05020c89 Reimar Döffinger
        goto fail;\
258
    }\
259
}
260
261 4ce94923 Diego Biurrun
#if defined(__ICC) || defined(__SUNPRO_C)
262
    #define DECLARE_ALIGNED(n,t,v)      t v __attribute__ ((aligned (n)))
263
    #define DECLARE_ASM_CONST(n,t,v)    const t __attribute__ ((aligned (n))) v
264
#elif defined(__GNUC__)
265
    #define DECLARE_ALIGNED(n,t,v)      t v __attribute__ ((aligned (n)))
266
    #define DECLARE_ASM_CONST(n,t,v)    static const t v attribute_used __attribute__ ((aligned (n)))
267 0f73b510 Diego Biurrun
#elif defined(_MSC_VER)
268
    #define DECLARE_ALIGNED(n,t,v)      __declspec(align(n)) t v
269
    #define DECLARE_ASM_CONST(n,t,v)    __declspec(align(n)) static const t v
270 4ce94923 Diego Biurrun
#elif HAVE_INLINE_ASM
271
    #error The asm code needs alignment, but we do not know how to do it for this compiler.
272
#else
273
    #define DECLARE_ALIGNED(n,t,v)      t v
274
    #define DECLARE_ASM_CONST(n,t,v)    static const t v
275
#endif
276
277
278 b250f9c6 Aurelien Jacobs
#if !HAVE_LLRINT
279 85074d3c Zuxy Meng
static av_always_inline av_const long long llrint(double x)
280 a33cab3a Michael Kostylev
{
281
    return rint(x);
282
}
283
#endif /* HAVE_LLRINT */
284
285 b250f9c6 Aurelien Jacobs
#if !HAVE_LRINT
286 85074d3c Zuxy Meng
static av_always_inline av_const long int lrint(double x)
287 a33cab3a Michael Kostylev
{
288
    return rint(x);
289
}
290
#endif /* HAVE_LRINT */
291
292 b250f9c6 Aurelien Jacobs
#if !HAVE_LRINTF
293 85074d3c Zuxy Meng
static av_always_inline av_const long int lrintf(float x)
294 05020c89 Reimar Döffinger
{
295
    return (int)(rint(x));
296
}
297
#endif /* HAVE_LRINTF */
298
299 b250f9c6 Aurelien Jacobs
#if !HAVE_ROUND
300 85074d3c Zuxy Meng
static av_always_inline av_const double round(double x)
301 a33cab3a Michael Kostylev
{
302
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
303
}
304
#endif /* HAVE_ROUND */
305
306 b250f9c6 Aurelien Jacobs
#if !HAVE_ROUNDF
307 85074d3c Zuxy Meng
static av_always_inline av_const float roundf(float x)
308 a33cab3a Michael Kostylev
{
309
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
310
}
311
#endif /* HAVE_ROUNDF */
312
313 b250f9c6 Aurelien Jacobs
#if !HAVE_TRUNCF
314 7b04b8a0 Michael Kostylev
static av_always_inline av_const float truncf(float x)
315
{
316
    return (x > 0) ? floor(x) : ceil(x);
317
}
318
#endif /* HAVE_TRUNCF */
319
320 d80a7fe5 Aurelien Jacobs
/**
321 bfe3676f Diego Biurrun
 * Returns NULL if CONFIG_SMALL is true, otherwise the argument
322
 * without modification. Used to disable the definition of strings
323 d80a7fe5 Aurelien Jacobs
 * (for example AVCodec long_names).
324
 */
325
#if CONFIG_SMALL
326
#   define NULL_IF_CONFIG_SMALL(x) NULL
327
#else
328
#   define NULL_IF_CONFIG_SMALL(x) x
329
#endif
330
331 98790382 Stefano Sabatini
#endif /* AVUTIL_INTERNAL_H */