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FFmpeg/libavutil/common.h

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/**
* @file common.h
* common internal api header.
*/
#ifndef COMMON_H
#define COMMON_H
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
# define PIC
#endif
#ifdef HAVE_AV_CONFIG_H
/* only include the following when compiling package */
# include "config.h"
# include <stdlib.h>
# include <stdio.h>
# include <string.h>
# include <ctype.h>
# include <limits.h>
# ifndef __BEOS__
# include <errno.h>
# else
# include "berrno.h"
# endif
# include <math.h>
# ifndef ENODATA
# define ENODATA 61
# endif
#include <stddef.h>
#ifndef offsetof
# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
#endif
#define AVOPTION_CODEC_BOOL(name, help, field) \
{ name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_BOOL }
#define AVOPTION_CODEC_DOUBLE(name, help, field, minv, maxv, defval) \
{ name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_DOUBLE, minv, maxv, defval }
#define AVOPTION_CODEC_FLAG(name, help, field, flag, defval) \
{ name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_FLAG, flag, 0, defval }
#define AVOPTION_CODEC_INT(name, help, field, minv, maxv, defval) \
{ name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_INT, minv, maxv, defval }
#define AVOPTION_CODEC_STRING(name, help, field, str, val) \
{ name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_STRING, .defval = val, .defstr = str }
#define AVOPTION_CODEC_RCOVERRIDE(name, help, field) \
{ name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_RCOVERRIDE, .defval = 0, .defstr = NULL }
#define AVOPTION_SUB(ptr) { .name = NULL, .help = (const char*)ptr }
#define AVOPTION_END() AVOPTION_SUB(NULL)
#endif /* HAVE_AV_CONFIG_H */
/* Suppress restrict if it was not defined in config.h. */
#ifndef restrict
# define restrict
#endif
#ifndef always_inline
#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
# define always_inline __attribute__((always_inline)) inline
#else
# define always_inline inline
#endif
#endif
#ifndef attribute_used
#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
# define attribute_used __attribute__((used))
#else
# define attribute_used
#endif
#endif
#ifndef attribute_unused
#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
# define attribute_unused __attribute__((unused))
#else
# define attribute_unused
#endif
#endif
#ifndef EMULATE_INTTYPES
# include <inttypes.h>
#else
typedef signed char int8_t;
typedef signed short int16_t;
typedef signed int int32_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
typedef signed long long int64_t;
typedef unsigned long long uint64_t;
#endif /* EMULATE_INTTYPES */
#ifndef PRId64
#define PRId64 "lld"
#endif
#ifndef PRIu64
#define PRIu64 "llu"
#endif
#ifndef PRIx64
#define PRIx64 "llx"
#endif
#ifndef PRId32
#define PRId32 "d"
#endif
#ifndef PRIdFAST16
#define PRIdFAST16 PRId32
#endif
#ifndef PRIdFAST32
#define PRIdFAST32 PRId32
#endif
#ifndef INT16_MIN
#define INT16_MIN (-0x7fff-1)
#endif
#ifndef INT16_MAX
#define INT16_MAX 0x7fff
#endif
#ifndef INT32_MIN
#define INT32_MIN (-0x7fffffff-1)
#endif
#ifndef INT32_MAX
#define INT32_MAX 0x7fffffff
#endif
#ifndef UINT32_MAX
#define UINT32_MAX 0xffffffff
#endif
#ifndef INT64_MIN
#define INT64_MIN (-0x7fffffffffffffffLL-1)
#endif
#ifndef INT64_MAX
#define INT64_MAX int64_t_C(9223372036854775807)
#endif
#ifndef UINT64_MAX
#define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)
#endif
#ifdef EMULATE_FAST_INT
typedef signed char int_fast8_t;
typedef signed int int_fast16_t;
typedef signed int int_fast32_t;
typedef unsigned char uint_fast8_t;
typedef unsigned int uint_fast16_t;
typedef unsigned int uint_fast32_t;
typedef uint64_t uint_fast64_t;
#endif
#ifndef INT_BIT
# if INT_MAX != 2147483647
# define INT_BIT 64
# else
# define INT_BIT 32
# endif
#endif
#ifdef __MINGW32__
/* windows */
# define int64_t_C(c) (c ## LL)
# define uint64_t_C(c) (c ## ULL)
# ifdef HAVE_AV_CONFIG_H
# ifdef _DEBUG
# define DEBUG
# endif
# define snprintf _snprintf
# define vsnprintf _vsnprintf
# ifdef CONFIG_WINCE
# define perror(a)
# endif
# endif
/* __MINGW32__ end */
#elif defined (CONFIG_OS2)
/* OS/2 EMX */
#ifdef HAVE_AV_CONFIG_H
#include <float.h>
#endif /* HAVE_AV_CONFIG_H */
#endif /* !__MINGW32__ && CONFIG_OS2 */
#ifndef int64_t_C
#define int64_t_C(c) (c ## LL)
#define uint64_t_C(c) (c ## ULL)
#endif
#ifdef HAVE_AV_CONFIG_H
# ifdef USE_FASTMEMCPY
# include "fastmemcpy.h"
# endif
#if defined(__MINGW32__) && !defined(BUILD_AVUTIL) && defined(BUILD_SHARED_AV)
# define FF_IMPORT_ATTR __declspec(dllimport)
#else
# define FF_IMPORT_ATTR
#endif
# include "bswap.h"
// Use rip-relative addressing if compiling PIC code on x86-64.
# if defined(__MINGW32__) || defined(__CYGWIN__) || \
defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
# if defined(ARCH_X86_64) && defined(PIC)
# define MANGLE(a) "_" #a"(%%rip)"
# else
# define MANGLE(a) "_" #a
# endif
# else
# if defined(ARCH_X86_64) && defined(PIC)
# define MANGLE(a) #a"(%%rip)"
# elif defined(CONFIG_DARWIN)
# define MANGLE(a) "_" #a
# else
# define MANGLE(a) #a
# endif
# endif
/* debug stuff */
# if !defined(DEBUG) && !defined(NDEBUG)
# define NDEBUG
# endif
# include <assert.h>
/* dprintf macros */
# ifdef DEBUG
# define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
# else
# define dprintf(fmt,...)
# endif
# ifdef CONFIG_WINCE
# define abort()
# endif
# define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
//rounded divison & shift
#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
/* assume b>0 */
#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
#define ABS(a) ((a) >= 0 ? (a) : (-(a)))
#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
extern const uint32_t inverse[256];
#if defined(ARCH_X86) || defined(ARCH_X86_64)
# define FASTDIV(a,b) \
({\
int ret,dmy;\
asm volatile(\
"mull %3"\
:"=d"(ret),"=a"(dmy)\
:"1"(a),"g"(inverse[b])\
);\
ret;\
})
#elif defined(CONFIG_FASTDIV)
# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*inverse[b])>>32))
#else
# define FASTDIV(a,b) ((a)/(b))
#endif
/* misc math functions */
extern FF_IMPORT_ATTR const uint8_t ff_log2_tab[256];
static inline int av_log2(unsigned int v)
{
int n;
n = 0;
if (v & 0xffff0000) {
v >>= 16;
n += 16;
}
if (v & 0xff00) {
v >>= 8;
n += 8;
}
n += ff_log2_tab[v];
return n;
}
static inline int av_log2_16bit(unsigned int v)
{
int n;
n = 0;
if (v & 0xff00) {
v >>= 8;
n += 8;
}
n += ff_log2_tab[v];
return n;
}
/* median of 3 */
static inline int mid_pred(int a, int b, int c)
{
#if 0
int t= (a-b)&((a-b)>>31);
a-=t;
b+=t;
b-= (b-c)&((b-c)>>31);
b+= (a-b)&((a-b)>>31);
return b;
#else
if(a>b){
if(c>b){
if(c>a) b=a;
else b=c;
}
}else{
if(b>c){
if(c>a) b=c;
else b=a;
}
}
return b;
#endif
}
/**
* clip a signed integer value into the amin-amax range
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
* @return cliped value
*/
static inline int clip(int a, int amin, int amax)
{
if (a < amin) return amin;
else if (a > amax) return amax;
else return a;
}
/**
* clip a signed integer value into the 0-255 range
* @param a value to clip
* @return cliped value
*/
static inline uint8_t clip_uint8(int a)
{
if (a&(~255)) return (-a)>>31;
else return a;
}
/* math */
extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];
int64_t ff_gcd(int64_t a, int64_t b);
static inline int ff_sqrt(int a)
{
int ret=0;
int s;
int ret_sq=0;
if(a<128) return ff_sqrt_tab[a];
for(s=15; s>=0; s--){
int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
if(b<=a){
ret_sq=b;
ret+= 1<<s;
}
}
return ret;
}
/**
* converts fourcc string to int
*/
static inline int ff_get_fourcc(const char *s){
assert( strlen(s)==4 );
return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);
}
#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
#define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
#if defined(ARCH_X86) || defined(ARCH_X86_64)
#define MASK_ABS(mask, level)\
asm volatile(\
"cdq \n\t"\
"xorl %1, %0 \n\t"\
"subl %1, %0 \n\t"\
: "+a" (level), "=&d" (mask)\
);
#else
#define MASK_ABS(mask, level)\
mask= level>>31;\
level= (level^mask)-mask;
#endif
#define GET_UTF8(val, GET_BYTE, ERROR)\
val= GET_BYTE;\
{\
int ones= 7 - av_log2(val ^ 255);\
if(ones==1)\
ERROR\
val&= 127>>ones;\
while(--ones > 0){\
int tmp= GET_BYTE - 128;\
if(tmp>>6)\
ERROR\
val= (val<<6) + tmp;\
}\
}
#if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT)
#define COPY3_IF_LT(x,y,a,b,c,d)\
asm volatile (\
"cmpl %0, %3 \n\t"\
"cmovl %3, %0 \n\t"\
"cmovl %4, %1 \n\t"\
"cmovl %5, %2 \n\t"\
: "+r" (x), "+r" (a), "+r" (c)\
: "r" (y), "r" (b), "r" (d)\
);
#else
#define COPY3_IF_LT(x,y,a,b,c,d)\
if((y)<(x)){\
(x)=(y);\
(a)=(b);\
(c)=(d);\
}
#endif
#if defined(ARCH_X86) || defined(ARCH_X86_64) || defined(ARCH_POWERPC)
#if defined(ARCH_X86_64)
static inline uint64_t read_time(void)
{
uint64_t a, d;
asm volatile( "rdtsc\n\t"
: "=a" (a), "=d" (d)
);
return (d << 32) | (a & 0xffffffff);
}
#elif defined(ARCH_X86)
static inline long long read_time(void)
{
long long l;
asm volatile( "rdtsc\n\t"
: "=A" (l)
);
return l;
}
#else //FIXME check ppc64
static inline uint64_t read_time(void)
{
uint32_t tbu, tbl, temp;
/* from section 2.2.1 of the 32-bit PowerPC PEM */
__asm__ __volatile__(
"1:\n"
"mftbu %2\n"
"mftb %0\n"
"mftbu %1\n"
"cmpw %2,%1\n"
"bne 1b\n"
: "=r"(tbl), "=r"(tbu), "=r"(temp)
:
: "cc");
return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
}
#endif
#define START_TIMER \
uint64_t tend;\
uint64_t tstart= read_time();\
#define STOP_TIMER(id) \
tend= read_time();\
{\
static uint64_t tsum=0;\
static int tcount=0;\
static int tskip_count=0;\
if(tcount<2 || tend - tstart < 8*tsum/tcount){\
tsum+= tend - tstart;\
tcount++;\
}else\
tskip_count++;\
if(256*256*256*64%(tcount+tskip_count)==0){\
av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n", tsum*10/tcount, id, tcount, tskip_count);\
}\
}
#else
#define START_TIMER
#define STOP_TIMER(id) {}
#endif
/* avoid usage of various functions */
#define malloc please_use_av_malloc
#define free please_use_av_free
#define realloc please_use_av_realloc
#define time time_is_forbidden_due_to_security_issues
#define rand rand_is_forbidden_due_to_state_trashing
#define srand srand_is_forbidden_due_to_state_trashing
#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
#define printf please_use_av_log
#define fprintf please_use_av_log
#endif
#define CHECKED_ALLOCZ(p, size)\
{\
p= av_mallocz(size);\
if(p==NULL && (size)!=0){\
perror("malloc");\
goto fail;\
}\
}
#ifndef HAVE_LRINTF
/* XXX: add ISOC specific test to avoid specific BSD testing. */
/* better than nothing implementation. */
/* btw, rintf() is existing on fbsd too -- alex */
static always_inline long int lrintf(float x)
{
#ifdef __MINGW32__
# ifdef ARCH_X86
int32_t i;
asm volatile(
"fistpl %0\n\t"
: "=m" (i) : "t" (x) : "st"
);
return i;
# else
/* XXX: incorrect, but make it compile */
return (int)(x + (x < 0 ? -0.5 : 0.5));
# endif /* ARCH_X86 */
#else
return (int)(rint(x));
#endif /* __MINGW32__ */
}
#endif /* HAVE_LRINTF */
#endif /* HAVE_AV_CONFIG_H */
#endif /* COMMON_H */