Statistics
| Branch: | Revision:

ffmpeg / libavutil / internal.h @ a2fc0f6a

History | View | Annotate | Download (7.13 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 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

    
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
#ifndef INT16_MIN
54
#define INT16_MIN       (-0x7fff-1)
55
#endif
56

    
57
#ifndef INT16_MAX
58
#define INT16_MAX       0x7fff
59
#endif
60

    
61
#ifndef INT32_MIN
62
#define INT32_MIN       (-0x7fffffff-1)
63
#endif
64

    
65
#ifndef INT32_MAX
66
#define INT32_MAX       0x7fffffff
67
#endif
68

    
69
#ifndef UINT32_MAX
70
#define UINT32_MAX      0xffffffff
71
#endif
72

    
73
#ifndef INT64_MIN
74
#define INT64_MIN       (-0x7fffffffffffffffLL-1)
75
#endif
76

    
77
#ifndef INT64_MAX
78
#define INT64_MAX INT64_C(9223372036854775807)
79
#endif
80

    
81
#ifndef UINT64_MAX
82
#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
83
#endif
84

    
85
#ifndef INT_BIT
86
#    if INT_MAX != 2147483647
87
#        define INT_BIT 64
88
#    else
89
#        define INT_BIT 32
90
#    endif
91
#endif
92

    
93
#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
94
#    define PIC
95
#endif
96

    
97
#include "config.h"
98
#include "intreadwrite.h"
99
#include "bswap.h"
100

    
101
#ifndef offsetof
102
#    define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
103
#endif
104

    
105
// Use rip-relative addressing if compiling PIC code on x86-64.
106
#if defined(ARCH_X86_64) && defined(PIC)
107
#    define LOCAL_MANGLE(a) #a "(%%rip)"
108
#else
109
#    define LOCAL_MANGLE(a) #a
110
#endif
111

    
112
#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
113

    
114
/* debug stuff */
115

    
116
/* dprintf macros */
117
#ifdef DEBUG
118
#    define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
119
#else
120
#    define dprintf(pctx, ...)
121
#endif
122

    
123
#define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
124

    
125
/* math */
126

    
127
extern const uint32_t ff_inverse[256];
128

    
129
#if defined(ARCH_X86)
130
#    define FASTDIV(a,b) \
131
    ({\
132
        int ret,dmy;\
133
        __asm__ volatile(\
134
            "mull %3"\
135
            :"=d"(ret),"=a"(dmy)\
136
            :"1"(a),"g"(ff_inverse[b])\
137
            );\
138
        ret;\
139
    })
140
#elif defined(HAVE_ARMV6)
141
static inline av_const int FASTDIV(int a, int b)
142
{
143
    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
    return r;
150
}
151
#elif defined(ARCH_ARM)
152
#    define FASTDIV(a,b) \
153
    ({\
154
        int ret,dmy;\
155
        __asm__ volatile(\
156
            "umull %1, %0, %2, %3"\
157
            :"=&r"(ret),"=&r"(dmy)\
158
            :"r"(a),"r"(ff_inverse[b])\
159
            );\
160
        ret;\
161
    })
162
#elif defined(CONFIG_FASTDIV)
163
#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
164
#else
165
#    define FASTDIV(a,b)   ((a)/(b))
166
#endif
167

    
168
extern const uint8_t ff_sqrt_tab[256];
169

    
170
static inline int av_log2_16bit(unsigned int v);
171

    
172
static inline av_const unsigned int ff_sqrt(unsigned int a)
173
{
174
    unsigned int b;
175

    
176
    if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
177
    else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
178
#ifndef CONFIG_SMALL
179
    else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
180
    else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ]   ;
181
#endif
182
    else{
183
        int s= av_log2_16bit(a>>16)>>1;
184
        unsigned int c= a>>(s+2);
185
        b= ff_sqrt_tab[c>>(s+8)];
186
        b= FASTDIV(c,b) + (b<<s);
187
    }
188

    
189
    return b - (a<b*b);
190
}
191

    
192
#if defined(ARCH_X86)
193
#define MASK_ABS(mask, level)\
194
            __asm__ volatile(\
195
                "cltd                   \n\t"\
196
                "xorl %1, %0            \n\t"\
197
                "subl %1, %0            \n\t"\
198
                : "+a" (level), "=&d" (mask)\
199
            );
200
#else
201
#define MASK_ABS(mask, level)\
202
            mask= level>>31;\
203
            level= (level^mask)-mask;
204
#endif
205

    
206
#ifdef HAVE_CMOV
207
#define COPY3_IF_LT(x,y,a,b,c,d)\
208
__asm__ volatile (\
209
    "cmpl %0, %3        \n\t"\
210
    "cmovl %3, %0       \n\t"\
211
    "cmovl %4, %1       \n\t"\
212
    "cmovl %5, %2       \n\t"\
213
    : "+&r" (x), "+&r" (a), "+r" (c)\
214
    : "r" (y), "r" (b), "r" (d)\
215
);
216
#else
217
#define COPY3_IF_LT(x,y,a,b,c,d)\
218
if((y)<(x)){\
219
     (x)=(y);\
220
     (a)=(b);\
221
     (c)=(d);\
222
}
223
#endif
224

    
225
/* avoid usage of various functions */
226
#undef  malloc
227
#define malloc please_use_av_malloc
228
#undef  free
229
#define free please_use_av_free
230
#undef  realloc
231
#define realloc please_use_av_realloc
232
#undef  time
233
#define time time_is_forbidden_due_to_security_issues
234
#undef  rand
235
#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
236
#undef  srand
237
#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
238
#undef  random
239
#define random random_is_forbidden_due_to_state_trashing_use_av_random
240
#undef  sprintf
241
#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
242
#undef  strcat
243
#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
244
#undef  exit
245
#define exit exit_is_forbidden
246
#ifndef LIBAVFORMAT_BUILD
247
#undef  printf
248
#define printf please_use_av_log
249
#undef  fprintf
250
#define fprintf please_use_av_log
251
#undef  puts
252
#define puts please_use_av_log
253
#undef  perror
254
#define perror please_use_av_log_instead_of_perror
255
#endif
256

    
257
#define CHECKED_ALLOCZ(p, size)\
258
{\
259
    p= av_mallocz(size);\
260
    if(p==NULL && (size)!=0){\
261
        av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
262
        goto fail;\
263
    }\
264
}
265

    
266
#ifndef HAVE_LLRINT
267
static av_always_inline av_const long long llrint(double x)
268
{
269
    return rint(x);
270
}
271
#endif /* HAVE_LLRINT */
272

    
273
#ifndef HAVE_LRINT
274
static av_always_inline av_const long int lrint(double x)
275
{
276
    return rint(x);
277
}
278
#endif /* HAVE_LRINT */
279

    
280
#ifndef HAVE_LRINTF
281
static av_always_inline av_const long int lrintf(float x)
282
{
283
    return (int)(rint(x));
284
}
285
#endif /* HAVE_LRINTF */
286

    
287
#ifndef HAVE_ROUND
288
static av_always_inline av_const double round(double x)
289
{
290
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
291
}
292
#endif /* HAVE_ROUND */
293

    
294
#ifndef HAVE_ROUNDF
295
static av_always_inline av_const float roundf(float x)
296
{
297
    return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
298
}
299
#endif /* HAVE_ROUNDF */
300

    
301
#endif /* AVUTIL_INTERNAL_H */