Split common.h in two parts, purely internal stuff (internal.h) and things
[libav.git] / libavutil / internal.h
CommitLineData
05020c89
RD
1/**
2 * @file internal.h
3 * common internal api header.
4 */
5
6#ifndef INTERNAL_H
7#define INTERNAL_H
8
9#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
10# define PIC
11#endif
12
13# ifndef ENODATA
14# define ENODATA 61
15# endif
16
17#include <stddef.h>
18#ifndef offsetof
19# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
20#endif
21
22#define AVOPTION_CODEC_BOOL(name, help, field) \
23 { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_BOOL }
24#define AVOPTION_CODEC_DOUBLE(name, help, field, minv, maxv, defval) \
25 { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_DOUBLE, minv, maxv, defval }
26#define AVOPTION_CODEC_FLAG(name, help, field, flag, defval) \
27 { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_FLAG, flag, 0, defval }
28#define AVOPTION_CODEC_INT(name, help, field, minv, maxv, defval) \
29 { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_INT, minv, maxv, defval }
30#define AVOPTION_CODEC_STRING(name, help, field, str, val) \
31 { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_STRING, .defval = val, .defstr = str }
32#define AVOPTION_CODEC_RCOVERRIDE(name, help, field) \
33 { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_RCOVERRIDE, .defval = 0, .defstr = NULL }
34#define AVOPTION_SUB(ptr) { .name = NULL, .help = (const char*)ptr }
35#define AVOPTION_END() AVOPTION_SUB(NULL)
36
37#ifdef __MINGW32__
38# ifdef _DEBUG
39# define DEBUG
40# endif
41
42# define snprintf _snprintf
43# define vsnprintf _vsnprintf
44
45# ifdef CONFIG_WINCE
46# define perror(a)
47# endif
48
49/* __MINGW32__ end */
50#elif defined (CONFIG_OS2)
51/* OS/2 EMX */
52
53#include <float.h>
54
55#endif /* !__MINGW32__ && CONFIG_OS2 */
56
57# ifdef USE_FASTMEMCPY
58# include "fastmemcpy.h"
59# endif
60
61// Use rip-relative addressing if compiling PIC code on x86-64.
62# if defined(__MINGW32__) || defined(__CYGWIN__) || \
63 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
64# if defined(ARCH_X86_64) && defined(PIC)
65# define MANGLE(a) "_" #a"(%%rip)"
66# else
67# define MANGLE(a) "_" #a
68# endif
69# else
70# if defined(ARCH_X86_64) && defined(PIC)
71# define MANGLE(a) #a"(%%rip)"
72# elif defined(CONFIG_DARWIN)
73# define MANGLE(a) "_" #a
74# else
75# define MANGLE(a) #a
76# endif
77# endif
78
79/* debug stuff */
80
81# if !defined(DEBUG) && !defined(NDEBUG)
82# define NDEBUG
83# endif
84# include <assert.h>
85
86/* dprintf macros */
87# ifdef DEBUG
88# define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
89# else
90# define dprintf(fmt,...)
91# endif
92
93# ifdef CONFIG_WINCE
94# define abort()
95# endif
96
97# define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
98
99extern const uint32_t inverse[256];
100
101#if defined(ARCH_X86) || defined(ARCH_X86_64)
102# define FASTDIV(a,b) \
103 ({\
104 int ret,dmy;\
105 asm volatile(\
106 "mull %3"\
107 :"=d"(ret),"=a"(dmy)\
108 :"1"(a),"g"(inverse[b])\
109 );\
110 ret;\
111 })
112#elif defined(CONFIG_FASTDIV)
113# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*inverse[b])>>32))
114#else
115# define FASTDIV(a,b) ((a)/(b))
116#endif
117
118/* math */
119extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];
120
121static inline int ff_sqrt(int a)
122{
123 int ret=0;
124 int s;
125 int ret_sq=0;
126
127 if(a<128) return ff_sqrt_tab[a];
128
129 for(s=15; s>=0; s--){
130 int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
131 if(b<=a){
132 ret_sq=b;
133 ret+= 1<<s;
134 }
135 }
136 return ret;
137}
138
139#if defined(ARCH_X86) || defined(ARCH_X86_64)
140#define MASK_ABS(mask, level)\
141 asm volatile(\
142 "cdq \n\t"\
143 "xorl %1, %0 \n\t"\
144 "subl %1, %0 \n\t"\
145 : "+a" (level), "=&d" (mask)\
146 );
147#else
148#define MASK_ABS(mask, level)\
149 mask= level>>31;\
150 level= (level^mask)-mask;
151#endif
152
153#if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT)
154#define COPY3_IF_LT(x,y,a,b,c,d)\
155asm volatile (\
156 "cmpl %0, %3 \n\t"\
157 "cmovl %3, %0 \n\t"\
158 "cmovl %4, %1 \n\t"\
159 "cmovl %5, %2 \n\t"\
160 : "+r" (x), "+r" (a), "+r" (c)\
161 : "r" (y), "r" (b), "r" (d)\
162);
163#else
164#define COPY3_IF_LT(x,y,a,b,c,d)\
165if((y)<(x)){\
166 (x)=(y);\
167 (a)=(b);\
168 (c)=(d);\
169}
170#endif
171
172/* avoid usage of various functions */
173#define malloc please_use_av_malloc
174#define free please_use_av_free
175#define realloc please_use_av_realloc
176#define time time_is_forbidden_due_to_security_issues
177#define rand rand_is_forbidden_due_to_state_trashing
178#define srand srand_is_forbidden_due_to_state_trashing
179#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
180#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
181#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
182#define printf please_use_av_log
183#define fprintf please_use_av_log
184#endif
185
186#define CHECKED_ALLOCZ(p, size)\
187{\
188 p= av_mallocz(size);\
189 if(p==NULL && (size)!=0){\
190 perror("malloc");\
191 goto fail;\
192 }\
193}
194
195#ifndef HAVE_LRINTF
196/* XXX: add ISOC specific test to avoid specific BSD testing. */
197/* better than nothing implementation. */
198/* btw, rintf() is existing on fbsd too -- alex */
199static always_inline long int lrintf(float x)
200{
201#ifdef __MINGW32__
202# ifdef ARCH_X86
203 int32_t i;
204 asm volatile(
205 "fistpl %0\n\t"
206 : "=m" (i) : "t" (x) : "st"
207 );
208 return i;
209# else
210 /* XXX: incorrect, but make it compile */
211 return (int)(x + (x < 0 ? -0.5 : 0.5));
212# endif /* ARCH_X86 */
213#else
214 return (int)(rint(x));
215#endif /* __MINGW32__ */
216}
217#endif /* HAVE_LRINTF */
218
219#endif /* INTERNAL_H */