Statistics
| Branch: | Revision:

ffmpeg / libavutil / internal.h @ a087028a

History | View | Annotate | Download (7.33 KB)

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(__MINGW32__) || defined(__CYGWIN__) || defined(__DJGPP__) || \
123
    defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
124
#    if defined(ARCH_X86_64) && defined(PIC)
125
#        define MANGLE(a) "_" #a"(%%rip)"
126
#    else
127
#        define MANGLE(a) "_" #a
128
#    endif
129
#else
130
#    if defined(ARCH_X86_64) && defined(PIC)
131
#        define MANGLE(a) #a"(%%rip)"
132
#    elif defined(__APPLE__)
133
#        define MANGLE(a) "_" #a
134
#    else
135
#        define MANGLE(a) #a
136
#    endif
137
#endif
138

    
139
/* debug stuff */
140

    
141
/* dprintf macros */
142
#ifdef DEBUG
143
#    define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
144
#else
145
#    define dprintf(pctx, ...)
146
#endif
147

    
148
#define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
149

    
150
/* math */
151

    
152
extern const uint32_t ff_inverse[256];
153

    
154
#if defined(ARCH_X86)
155
#    define FASTDIV(a,b) \
156
    ({\
157
        int ret,dmy;\
158
        asm volatile(\
159
            "mull %3"\
160
            :"=d"(ret),"=a"(dmy)\
161
            :"1"(a),"g"(ff_inverse[b])\
162
            );\
163
        ret;\
164
    })
165
#elif defined(ARCH_ARMV4L)
166
#    define FASTDIV(a,b) \
167
    ({\
168
        int ret,dmy;\
169
        asm volatile(\
170
            "umull %1, %0, %2, %3"\
171
            :"=&r"(ret),"=&r"(dmy)\
172
            :"r"(a),"r"(ff_inverse[b])\
173
            );\
174
        ret;\
175
    })
176
#elif defined(CONFIG_FASTDIV)
177
#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
178
#else
179
#    define FASTDIV(a,b)   ((a)/(b))
180
#endif
181

    
182
extern const uint8_t ff_sqrt_tab[256];
183

    
184
static inline int av_log2_16bit(unsigned int v);
185

    
186
static inline unsigned int ff_sqrt(unsigned int a)
187
{
188
    unsigned int b;
189

    
190
    if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
191
    else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
192
#ifndef CONFIG_SMALL
193
    else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
194
    else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ]   ;
195
#endif
196
    else{
197
        int s= av_log2_16bit(a>>16)>>1;
198
        unsigned int c= a>>(s+2);
199
        b= ff_sqrt_tab[c>>(s+8)];
200
        b= FASTDIV(c,b) + (b<<s);
201
    }
202

    
203
    return b - (a<b*b);
204
}
205

    
206
#if defined(ARCH_X86)
207
#define MASK_ABS(mask, level)\
208
            asm volatile(\
209
                "cltd                   \n\t"\
210
                "xorl %1, %0            \n\t"\
211
                "subl %1, %0            \n\t"\
212
                : "+a" (level), "=&d" (mask)\
213
            );
214
#else
215
#define MASK_ABS(mask, level)\
216
            mask= level>>31;\
217
            level= (level^mask)-mask;
218
#endif
219

    
220
#ifdef HAVE_CMOV
221
#define COPY3_IF_LT(x,y,a,b,c,d)\
222
asm volatile (\
223
    "cmpl %0, %3        \n\t"\
224
    "cmovl %3, %0       \n\t"\
225
    "cmovl %4, %1       \n\t"\
226
    "cmovl %5, %2       \n\t"\
227
    : "+&r" (x), "+&r" (a), "+r" (c)\
228
    : "r" (y), "r" (b), "r" (d)\
229
);
230
#else
231
#define COPY3_IF_LT(x,y,a,b,c,d)\
232
if((y)<(x)){\
233
     (x)=(y);\
234
     (a)=(b);\
235
     (c)=(d);\
236
}
237
#endif
238

    
239
/* avoid usage of various functions */
240
#undef  malloc
241
#define malloc please_use_av_malloc
242
#undef  free
243
#define free please_use_av_free
244
#undef  realloc
245
#define realloc please_use_av_realloc
246
#undef  time
247
#define time time_is_forbidden_due_to_security_issues
248
#undef  rand
249
#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
250
#undef  srand
251
#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
252
#undef  random
253
#define random random_is_forbidden_due_to_state_trashing_use_av_random
254
#undef  sprintf
255
#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
256
#undef  strcat
257
#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
258
#undef  exit
259
#define exit exit_is_forbidden
260
#if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
261
#undef  printf
262
#define printf please_use_av_log
263
#undef  fprintf
264
#define fprintf please_use_av_log
265
#undef  puts
266
#define puts please_use_av_log
267
#undef  perror
268
#define perror please_use_av_log_instead_of_perror
269
#endif
270

    
271
#define CHECKED_ALLOCZ(p, size)\
272
{\
273
    p= av_mallocz(size);\
274
    if(p==NULL && (size)!=0){\
275
        av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
276
        goto fail;\
277
    }\
278
}
279

    
280
#ifndef HAVE_LLRINT
281
static av_always_inline long long llrint(double x)
282
{
283
    return rint(x);
284
}
285
#endif /* HAVE_LLRINT */
286

    
287
#ifndef HAVE_LRINT
288
static av_always_inline long int lrint(double x)
289
{
290
    return rint(x);
291
}
292
#endif /* HAVE_LRINT */
293

    
294
#ifndef HAVE_LRINTF
295
static av_always_inline long int lrintf(float x)
296
{
297
    return (int)(rint(x));
298
}
299
#endif /* HAVE_LRINTF */
300

    
301
#ifndef HAVE_ROUND
302
static av_always_inline double round(double x)
303
{
304
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
305
}
306
#endif /* HAVE_ROUND */
307

    
308
#ifndef HAVE_ROUNDF
309
static av_always_inline float roundf(float x)
310
{
311
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
312
}
313
#endif /* HAVE_ROUNDF */
314

    
315
#endif /* FFMPEG_INTERNAL_H */