Base data types

Base data types of GPAC. More...

Collaboration diagram for Base data types:

Data Structures
struct	GF_Fraction
struct	GF_Fraction64

Macros
#define	_FILE_OFFSET_BITS   64
#define	_LARGEFILE_SOURCE
#define	_LARGEFILE64_SOURCE
#define	GPAC_HAS_FD
#define	GFINLINE   inline
#define	stricmp   strcasecmp
#define	strnicmp   strncasecmp
#define	strupr   my_str_upr
#define	strlwr   my_str_lwr
#define	GF_PATH_SEPARATOR   '/'
#define	GF_MAX_PATH   1023
#define	GF_MAX_DOUBLE   DBL_MAX
#define	GF_MIN_DOUBLE   -GF_MAX_DOUBLE
#define	GF_MAX_FLOAT   FLT_MAX
#define	GF_MIN_FLOAT   -GF_MAX_FLOAT
#define	GF_EPSILON_FLOAT   FLT_EPSILON
#define	GF_SHORT_MAX   SHRT_MAX
#define	GF_SHORT_MIN   SHRT_MIN
#define	GF_UINT_MAX   UINT_MAX
#define	GF_INT_MAX   INT_MAX
#define	GF_INT_MIN   INT_MIN
#define	GF_UINT64_MAX   ULLONG_MAX
#define	GF_INT64_MAX   LLONG_MAX
#define	GF_INT64_MIN   LLONG_MIN
#define	MIN(X, Y)   ((X)<(Y)?(X):(Y))
#define	MAX(X, Y)   ((X)>(Y)?(X):(Y))
#define	ABSDIFF(a, b)   ( ( (a) > (b) ) ? ((a) - (b)) : ((b) - (a)) )
#define	ABS(a)   ( ( (a) > 0 ) ? (a) : - (a) )
#define	LLD_SUF   "lld"
#define	LLU_SUF   "llu"
#define	LLX_SUF   "llx"
#define	PTR_TO_U_CAST   (u32)
#define	LLD   "%" LLD_SUF
#define	LLU   "%" LLU_SUF
#define	LLX   "%" LLX_SUF
#define	GF_EXPORT
#define	gf_stringizer(x)
	Stringizer. More...
#define	GF_4CC(a, b, c, d)   ((((u32)a)<<24)|(((u32)b)<<16)|(((u32)c)<<8)|((u32)d))
	4CC Formatting More...
#define	GF_4CC_CSTR(s)
#define	GF_4CC_MSIZE   10

Typedefs
typedef uint64_t	u64
typedef int64_t	s64
typedef uint32_t	u32
typedef int32_t	s32
typedef uint16_t	u16
typedef int16_t	s16
typedef uint8_t	u8
typedef int8_t	s8
typedef double	Double
typedef float	Float
typedef u8	bin128[16]

Enumerations
enum	Bool { GF_FALSE = 0 , GF_TRUE }

Functions
char *	my_str_upr (char *str)
char *	my_str_lwr (char *str)
const char *	gf_4cc_to_str (u32 type)
const char *	gf_4cc_to_str_safe (u32 type, char szType[GF_4CC_MSIZE])
u32	gf_4cc_parse (const char *val)

Detailed Description

This section documents the base data types of GPAC, as well as some macros wrapping platform-specific functionalities. For better portability, only use the base data types defined here.

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Data Structure Documentation

GF_Fraction

struct GF_Fraction

32 bit fraction

Data Fields
s32	num
u32	den

GF_Fraction64

struct GF_Fraction64

64 bit fraction

Data Fields
s64	num
u64	den

Macro Definition Documentation

_FILE_OFFSET_BITS

#define _FILE_OFFSET_BITS   64

max file offset bits

_LARGEFILE_SOURCE

#define _LARGEFILE_SOURCE

largefile

_LARGEFILE64_SOURCE

#define _LARGEFILE64_SOURCE

largefile64

GPAC_HAS_FD

#define GPAC_HAS_FD

file descriptor support

GFINLINE

#define GFINLINE   inline

macro for cross-platform inlining of functions

stricmp

#define stricmp   strcasecmp

use stricmp

strnicmp

#define strnicmp   strncasecmp

use strnicmp

strupr

#define strupr   my_str_upr

use strupr

strlwr

#define strlwr   my_str_lwr

use strulwr

GF_PATH_SEPARATOR

#define GF_PATH_SEPARATOR   '/'

default path separator of the current platform

GF_MAX_PATH

#define GF_MAX_PATH   1023

default max filesystem path size of the current platform

GF_MAX_DOUBLE

#define GF_MAX_DOUBLE   DBL_MAX

max positive possible value for Double

GF_MIN_DOUBLE

#define GF_MIN_DOUBLE   -GF_MAX_DOUBLE

max negative possible value for Double

GF_MAX_FLOAT

#define GF_MAX_FLOAT   FLT_MAX

max positive possible value for Float

GF_MIN_FLOAT

#define GF_MIN_FLOAT   -GF_MAX_FLOAT

max negative possible value for Float

GF_EPSILON_FLOAT

#define GF_EPSILON_FLOAT   FLT_EPSILON

smallest possible value for float

GF_SHORT_MAX

#define GF_SHORT_MAX   SHRT_MAX

max possible value for s16

GF_SHORT_MIN

#define GF_SHORT_MIN   SHRT_MIN

min possible value for s16

GF_UINT_MAX

#define GF_UINT_MAX   UINT_MAX

max possible value for u32

GF_INT_MAX

#define GF_INT_MAX   INT_MAX

max possible value for s32

GF_INT_MIN

#define GF_INT_MIN   INT_MIN

min possible value for s32

GF_UINT64_MAX

#define GF_UINT64_MAX   ULLONG_MAX

max possible value for u64

GF_INT64_MAX

#define GF_INT64_MAX   LLONG_MAX

max possible value for s64

GF_INT64_MIN

#define GF_INT64_MIN   LLONG_MIN

min possible value for s64

MIN

#define MIN	(		X,
			Y
	)		((X)<(Y)?(X):(Y))

get the smallest of two numbers

MAX

#define MAX	(		X,
			Y
	)		((X)>(Y)?(X):(Y))

get the biggest of two numbers

ABSDIFF

#define ABSDIFF	(		a,
			b
	)		( ( (a) > (b) ) ? ((a) - (b)) : ((b) - (a)) )

get the absolute difference betwee two numbers

ABS

#define ABS

(

a

)

( ( (a) > 0 ) ? (a) : - (a) )

get the absolute value of a number

LLD_SUF

#define LLD_SUF   "lld"

macro for cross-platform suffix used for formatting s64 integers in logs and printf routines

LLU_SUF

#define LLU_SUF   "llu"

macro for cross-platform suffix used for formatting u64 integers in logs and printf routines

LLX_SUF

#define LLX_SUF   "llx"

macro for cross-platform suffix used for formatting u64 integers as hex in logs and printf routines

PTR_TO_U_CAST

#define PTR_TO_U_CAST   (u32)

macro for cross-platform casting a pointer to an integer

LLD

#define LLD   "%" LLD_SUF

macro for cross-platform formatting of s64 integers in logs and printf routines

LLU

#define LLU   "%" LLU_SUF

macro for cross-platform formatting of u64 integers in logs and printf routines

LLX

#define LLX   "%" LLX_SUF

macro for cross-platform formatting of u64 integers as hexadecimal in logs and printf routines

GF_EXPORT

#define GF_EXPORT

macro for cross-platform signaling of exported function of libgpac

gf_stringizer

#define gf_stringizer

(

x

)

Macro transforming its input name into a string

GF_4CC

#define GF_4CC	(		a,
			b,
			c,
			d
	)		((((u32)a)<<24)|(((u32)b)<<16)|(((u32)c)<<8)|((u32)d))

Macro formatting a 4-character code (or 4CC) "abcd" as 0xAABBCCDD

GF_4CC_CSTR

#define GF_4CC_CSTR

(

s

)

Macro formating 4CC from compiler-constant string of 4 characters

GF_4CC_MSIZE

#define GF_4CC_MSIZE   10

minimum buffer size to hold any 4CC in string format

Typedef Documentation

u64

typedef uint64_t u64

64 bit unsigned integer

s64

typedef int64_t s64

64 bit signed integer

u32

typedef uint32_t u32

32 bit unsigned integer

s32

typedef int32_t s32

32 bit signed integer

u16

typedef uint16_t u16

16 bit unsigned integer

s16

typedef int16_t s16

16 bit signed integer

u8

typedef uint8_t u8

8 bit unsigned integer

s8

typedef int8_t s8

8 bit signed integer

Double

typedef double Double

Double-precision floating point number

Float

typedef float Float

Single-precision floating point number

bin128

typedef u8 bin128[16]

128 bit IDs

Enumeration Type Documentation

Bool

enum Bool

boolean value

Enumerator
GF_FALSE
GF_TRUE

Function Documentation

my_str_upr()

char* my_str_upr

(

char *

str

)

gets upper case

Parameters

str	input string

Returns

uper case to free

my_str_lwr()

char* my_str_lwr

(

char *

str

)

gets lower case

Parameters

str	input string

Returns

lower case to free

gf_4cc_to_str()

const char* gf_4cc_to_str

(

u32

type

)

converts four character code to string

Parameters

type	a four character code

Returns

a printable form of the code

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gf_4cc_to_str_safe()

const char* gf_4cc_to_str_safe	(	u32	type,
		char	szType[GF_4CC_MSIZE]
	)

converts four character code to string in the provided buffer - thread-safe version of gf_4cc_to_str

Parameters

type	a four character code
szType	buffer to write the code to

Returns

the onput buffer

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gf_4cc_parse()

u32 gf_4cc_parse

(

const char *

val

)

converts a 4CC string to its 32 bits value

Parameters

val	four character string

Returns

code value or 0 if error

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