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/**
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 * @file common.h
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 * common internal api header.
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 */
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#ifndef COMMON_H
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#define COMMON_H
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#if defined(WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
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#    define CONFIG_WIN32
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#endif
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#ifndef M_PI
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#define M_PI    3.14159265358979323846
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#endif
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#ifdef HAVE_AV_CONFIG_H
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/* only include the following when compiling package */
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#    include "config.h"
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#    include <stdlib.h>
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#    include <stdio.h>
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#    include <string.h>
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#    include <ctype.h>
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#    include <limits.h>
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#    ifndef __BEOS__
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#        include <errno.h>
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#    else
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#        include "berrno.h"
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#    endif
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#    include <math.h>
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#    ifndef ENODATA
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#        define ENODATA  61
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#    endif
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#include <stddef.h>
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#ifndef offsetof
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# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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#endif
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#define AVOPTION_CODEC_BOOL(name, help, field) \
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    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_BOOL }
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#define AVOPTION_CODEC_DOUBLE(name, help, field, minv, maxv, defval) \
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    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_DOUBLE, minv, maxv, defval }
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#define AVOPTION_CODEC_FLAG(name, help, field, flag, defval) \
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    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_FLAG, flag, 0, defval }
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#define AVOPTION_CODEC_INT(name, help, field, minv, maxv, defval) \
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    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_INT, minv, maxv, defval }
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#define AVOPTION_CODEC_STRING(name, help, field, str, val) \
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    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_STRING, .defval = val, .defstr = str }
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#define AVOPTION_CODEC_RCOVERRIDE(name, help, field) \
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    { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_RCOVERRIDE, .defval = 0, .defstr = NULL }
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#define AVOPTION_SUB(ptr) { .name = NULL, .help = (const char*)ptr }
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#define AVOPTION_END() AVOPTION_SUB(NULL)
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#endif /* HAVE_AV_CONFIG_H */
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/* Suppress restrict if it was not defined in config.h.  */
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#ifndef restrict
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#    define restrict
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#endif
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#ifndef always_inline
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#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
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#    define always_inline __attribute__((always_inline)) inline
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#else
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#    define always_inline inline
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#endif
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#endif
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#ifndef attribute_used
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#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
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#    define attribute_used __attribute__((used))
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#else
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#    define attribute_used
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#endif
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#endif
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#ifndef attribute_unused
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#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
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#    define attribute_unused __attribute__((unused))
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#else
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#    define attribute_unused
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#endif
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#endif
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#ifndef EMULATE_INTTYPES
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#   include <inttypes.h>
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#else
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    typedef signed char  int8_t;
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    typedef signed short int16_t;
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    typedef signed int   int32_t;
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    typedef unsigned char  uint8_t;
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    typedef unsigned short uint16_t;
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    typedef unsigned int   uint32_t;
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#   ifdef CONFIG_WIN32
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        typedef signed __int64   int64_t;
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        typedef unsigned __int64 uint64_t;
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#   else /* other OS */
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        typedef signed long long   int64_t;
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        typedef unsigned long long uint64_t;
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#   endif /* other OS */
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#endif /* HAVE_INTTYPES_H */
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#ifndef INT16_MIN
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#define INT16_MIN       (-0x7fff-1)
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#endif
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#ifndef INT16_MAX
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#define INT16_MAX       0x7fff
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#endif
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#ifndef INT64_MIN
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#define INT64_MIN       (-0x7fffffffffffffffLL-1)
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#endif
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#ifndef INT64_MAX
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#define INT64_MAX int64_t_C(9223372036854775807)
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#endif
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#ifndef UINT64_MAX
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#define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)
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#endif
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#ifdef EMULATE_FAST_INT
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typedef signed char int_fast8_t;
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typedef signed int  int_fast16_t;
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typedef signed int  int_fast32_t;
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typedef unsigned char uint_fast8_t;
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typedef unsigned int  uint_fast16_t;
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typedef unsigned int  uint_fast32_t;
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typedef uint64_t      uint_fast64_t;
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#endif
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#ifndef INT_BIT
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#    if INT_MAX != 2147483647
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#        define INT_BIT 64
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#    else
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#        define INT_BIT 32
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#    endif
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#endif
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#if defined(CONFIG_OS2) || defined(CONFIG_SUNOS)
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static inline float floorf(float f) { 
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    return floor(f); 
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}
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#endif
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#ifdef CONFIG_WIN32
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/* windows */
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#    if !defined(__MINGW32__) && !defined(__CYGWIN__)
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#        define int64_t_C(c)     (c ## i64)
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#        define uint64_t_C(c)    (c ## i64)
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#    ifdef HAVE_AV_CONFIG_H
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#            define inline __inline
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#    endif
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#    else
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#        define int64_t_C(c)     (c ## LL)
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#        define uint64_t_C(c)    (c ## ULL)
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#    endif /* __MINGW32__ */
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#    ifdef HAVE_AV_CONFIG_H
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#        ifdef _DEBUG
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#            define DEBUG
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#        endif
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#        define snprintf _snprintf
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#        define vsnprintf _vsnprintf
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#    endif
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/* CONFIG_WIN32 end */
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#elif defined (CONFIG_OS2)
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/* OS/2 EMX */
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#ifndef int64_t_C
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#define int64_t_C(c)     (c ## LL)
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#define uint64_t_C(c)    (c ## ULL)
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#endif
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#ifdef HAVE_AV_CONFIG_H
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h"
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#endif
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#include <float.h>
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#endif /* HAVE_AV_CONFIG_H */
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/* CONFIG_OS2 end */
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#else
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/* unix */
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#ifndef int64_t_C
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#define int64_t_C(c)     (c ## LL)
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#define uint64_t_C(c)    (c ## ULL)
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#endif
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#ifdef HAVE_AV_CONFIG_H
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#        ifdef USE_FASTMEMCPY
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#            include "fastmemcpy.h"
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#        endif
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#    endif /* HAVE_AV_CONFIG_H */
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#endif /* !CONFIG_WIN32 && !CONFIG_OS2 */
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#ifdef HAVE_AV_CONFIG_H
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#    include "bswap.h"
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// Use rip-relative addressing if compiling PIC code on x86-64.
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#    if defined(__MINGW32__) || defined(__CYGWIN__) || \
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        defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
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#        if defined(ARCH_X86_64) && defined(PIC)
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#            define MANGLE(a) "_" #a"(%%rip)"
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#        else
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#            define MANGLE(a) "_" #a
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#        endif
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#    else
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#        if defined(ARCH_X86_64) && defined(PIC)
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#            define MANGLE(a) #a"(%%rip)"
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#        else
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#            define MANGLE(a) #a
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#        endif
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#    endif
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/* debug stuff */
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#    ifndef DEBUG
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#        define NDEBUG
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#    endif
240
#    include <assert.h>
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/* dprintf macros */
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#    if defined(CONFIG_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
244

    
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inline void dprintf(const char* fmt,...) {}
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#    else
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#        ifdef DEBUG
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#            define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
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#        else
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#            define dprintf(fmt,...)
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#        endif
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#    endif /* !CONFIG_WIN32 */
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#    define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
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//rounded divison & shift
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#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
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/* assume b>0 */
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#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
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#define ABS(a) ((a) >= 0 ? (a) : (-(a)))
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#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
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#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
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extern const uint32_t inverse[256];
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#if defined(ARCH_X86) || defined(ARCH_X86_64)
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#    define FASTDIV(a,b) \
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    ({\
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        int ret,dmy;\
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        asm volatile(\
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            "mull %3"\
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            :"=d"(ret),"=a"(dmy)\
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            :"1"(a),"g"(inverse[b])\
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            );\
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        ret;\
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    })
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#elif defined(CONFIG_FASTDIV)
282
#    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*inverse[b])>>32))
283
#else
284
#    define FASTDIV(a,b)   ((a)/(b))
285
#endif
286
 
287
/* define it to include statistics code (useful only for optimizing
288
   codec efficiency */
289
//#define STATS
290

    
291
#ifdef STATS
292

    
293
enum {
294
    ST_UNKNOWN,
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    ST_DC,
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    ST_INTRA_AC,
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    ST_INTER_AC,
298
    ST_INTRA_MB,
299
    ST_INTER_MB,
300
    ST_MV,
301
    ST_NB,
302
};
303

    
304
extern int st_current_index;
305
extern unsigned int st_bit_counts[ST_NB];
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extern unsigned int st_out_bit_counts[ST_NB];
307

    
308
void print_stats(void);
309
#endif
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311
/* misc math functions */
312
extern const uint8_t ff_log2_tab[256];
313

    
314
static inline int av_log2(unsigned int v)
315
{
316
    int n;
317

    
318
    n = 0;
319
    if (v & 0xffff0000) {
320
        v >>= 16;
321
        n += 16;
322
    }
323
    if (v & 0xff00) {
324
        v >>= 8;
325
        n += 8;
326
    }
327
    n += ff_log2_tab[v];
328

    
329
    return n;
330
}
331

    
332
static inline int av_log2_16bit(unsigned int v)
333
{
334
    int n;
335

    
336
    n = 0;
337
    if (v & 0xff00) {
338
        v >>= 8;
339
        n += 8;
340
    }
341
    n += ff_log2_tab[v];
342

    
343
    return n;
344
}
345

    
346
/* median of 3 */
347
static inline int mid_pred(int a, int b, int c)
348
{
349
#if 0
350
    int t= (a-b)&((a-b)>>31);
351
    a-=t;
352
    b+=t;
353
    b-= (b-c)&((b-c)>>31);
354
    b+= (a-b)&((a-b)>>31);
355

356
    return b;
357
#else
358
    if(a>b){
359
        if(c>b){
360
            if(c>a) b=a;
361
            else    b=c;
362
        }
363
    }else{
364
        if(b>c){
365
            if(c>a) b=c;
366
            else    b=a;
367
        }
368
    }
369
    return b;
370
#endif
371
}
372

    
373
static inline int clip(int a, int amin, int amax)
374
{
375
    if (a < amin)
376
        return amin;
377
    else if (a > amax)
378
        return amax;
379
    else
380
        return a;
381
}
382

    
383
static inline int clip_uint8(int a)
384
{
385
    if (a&(~255)) return (-a)>>31;
386
    else          return a;
387
}
388

    
389
/* math */
390
extern const uint8_t ff_sqrt_tab[128];
391

    
392
int64_t ff_gcd(int64_t a, int64_t b);
393

    
394
static inline int ff_sqrt(int a)
395
{
396
    int ret=0;
397
    int s;
398
    int ret_sq=0;
399
    
400
    if(a<128) return ff_sqrt_tab[a];
401
    
402
    for(s=15; s>=0; s--){
403
        int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
404
        if(b<=a){
405
            ret_sq=b;
406
            ret+= 1<<s;
407
        }
408
    }
409
    return ret;
410
}
411

    
412
/**
413
 * converts fourcc string to int
414
 */
415
static inline int ff_get_fourcc(const char *s){
416
    assert( strlen(s)==4 );
417

    
418
    return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);
419
}
420

    
421
#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
422
#define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
423

    
424

    
425
#if defined(ARCH_X86) || defined(ARCH_X86_64)
426
#define MASK_ABS(mask, level)\
427
            asm volatile(\
428
                "cdq                        \n\t"\
429
                "xorl %1, %0                \n\t"\
430
                "subl %1, %0                \n\t"\
431
                : "+a" (level), "=&d" (mask)\
432
            );
433
#else
434
#define MASK_ABS(mask, level)\
435
            mask= level>>31;\
436
            level= (level^mask)-mask;
437
#endif
438

    
439

    
440
#if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT)
441
#define COPY3_IF_LT(x,y,a,b,c,d)\
442
asm volatile (\
443
    "cmpl %0, %3        \n\t"\
444
    "cmovl %3, %0        \n\t"\
445
    "cmovl %4, %1        \n\t"\
446
    "cmovl %5, %2        \n\t"\
447
    : "+r" (x), "+r" (a), "+r" (c)\
448
    : "r" (y), "r" (b), "r" (d)\
449
);
450
#else
451
#define COPY3_IF_LT(x,y,a,b,c,d)\
452
if((y)<(x)){\
453
     (x)=(y);\
454
     (a)=(b);\
455
     (c)=(d);\
456
}
457
#endif
458

    
459
#if defined(ARCH_X86) || defined(ARCH_X86_64) || defined(ARCH_POWERPC)
460
#if defined(ARCH_X86_64)
461
static inline uint64_t read_time(void)
462
{
463
        uint64_t a, d;
464
        asm volatile(        "rdtsc\n\t"
465
                : "=a" (a), "=d" (d)
466
        );
467
        return (d << 32) | (a & 0xffffffff);
468
}
469
#elif defined(ARCH_X86)
470
static inline long long read_time(void)
471
{
472
        long long l;
473
        asm volatile(        "rdtsc\n\t"
474
                : "=A" (l)
475
        );
476
        return l;
477
}
478
#else //FIXME check ppc64
479
static inline uint64_t read_time(void)
480
{
481
    uint32_t tbu, tbl, temp;
482

    
483
     /* from section 2.2.1 of the 32-bit PowerPC PEM */
484
     __asm__ __volatile__(
485
         "1:\n"
486
         "mftbu  %2\n"
487
         "mftb   %0\n"
488
         "mftbu  %1\n"
489
         "cmpw   %2,%1\n"
490
         "bne    1b\n"
491
     : "=r"(tbl), "=r"(tbu), "=r"(temp)
492
     :
493
     : "cc");
494

    
495
     return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
496
}
497
#endif
498

    
499
#define START_TIMER \
500
uint64_t tend;\
501
uint64_t tstart= read_time();\
502

    
503
#define STOP_TIMER(id) \
504
tend= read_time();\
505
{\
506
  static uint64_t tsum=0;\
507
  static int tcount=0;\
508
  static int tskip_count=0;\
509
  if(tcount<2 || tend - tstart < 8*tsum/tcount){\
510
      tsum+= tend - tstart;\
511
      tcount++;\
512
  }else\
513
      tskip_count++;\
514
  if(256*256*256*64%(tcount+tskip_count)==0){\
515
      av_log(NULL, AV_LOG_DEBUG, "%Ld dezicycles in %s, %d runs, %d skips\n", tsum*10/tcount, id, tcount, tskip_count);\
516
  }\
517
}
518
#else
519
#define START_TIMER 
520
#define STOP_TIMER(id) {}
521
#endif
522

    
523
/* avoid usage of various functions */
524
#define malloc please_use_av_malloc
525
#define free please_use_av_free
526
#define realloc please_use_av_realloc
527
#define time time_is_forbidden_due_to_security_issues
528
#define rand rand_is_forbidden_due_to_state_trashing
529
#define srand srand_is_forbidden_due_to_state_trashing
530
#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
531
#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
532
#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
533
#define printf please_use_av_log
534
#define fprintf please_use_av_log
535
#endif
536

    
537
#define CHECKED_ALLOCZ(p, size)\
538
{\
539
    p= av_mallocz(size);\
540
    if(p==NULL && (size)!=0){\
541
        perror("malloc");\
542
        goto fail;\
543
    }\
544
}
545

    
546
#endif /* HAVE_AV_CONFIG_H */
547

    
548
#endif /* COMMON_H */