Main tools

Collaboration diagram for Main tools:

Data Structures
struct	GF_GPACArg

Macros
#define	GF_MAIN_FUNC(__fun)
#define	GF_GPAC_ARG_BASE
#define	GF_ARG_HINT_ADVANCED   (1<<1)
#define	GF_ARG_HINT_EXPERT   (1<<2)
#define	GF_ARG_HINT_HIDE   (1<<3)
#define	GF_ARG_HINT_EXPERIMENTAL   (1<<4)
#define	GF_ARG_SUBSYS_CORE   (1<<5)
#define	GF_ARG_SUBSYS_LOG   (1<<6)
#define	GF_ARG_SUBSYS_FILTERS   (1<<7)
#define	GF_ARG_SUBSYS_HTTP   (1<<8)
#define	GF_ARG_SUBSYS_VIDEO   (1<<9)
#define	GF_ARG_SUBSYS_AUDIO   (1<<10)
#define	GF_ARG_SUBSYS_TEXT   (1<<11)
#define	GF_ARG_SUBSYS_RMT   (1<<12)
#define	GF_ARG_SUBSYS_HACKS   (1<<13)
#define	GF_ARG_BOOL   0
#define	GF_ARG_INT   1
#define	GF_ARG_DOUBLE   2
#define	GF_ARG_STRING   3
#define	GF_ARG_STRINGS   4
#define	GF_ARG_4CC   5
#define	GF_ARG_4CCS   6
#define	GF_ARG_CUSTOM   7
#define	GF_DEF_ARG(_a, _b, _c, _d, _e, _f, _g)   {_a, _b, _c, _d, _e, _f, _g}

Enumerations
enum	GF_SysArgMode { GF_ARGMODE_BASE =0 , GF_ARGMODE_ADVANCED , GF_ARGMODE_EXPERT , GF_ARGMODE_ALL }
enum	GF_SysPrintArgFlags {   GF_PRINTARG_HIGHLIGHT_FIRST = 1 , GF_PRINTARG_NL_TO_BR = 1<<1 , GF_PRINTARG_OPT_DESC = 1<<2 , GF_PRINTARG_IS_APP = 1<<3 ,   GF_PRINTARG_ADD_DASH = 1<<4 , GF_PRINTARG_NO_DASH = 1<<5 , GF_PRINTARG_COLON = 1<<6 , GF_PRINTARG_MD = 1<<16 ,   GF_PRINTARG_MAN = 1<<17 , GF_PRINTARG_ESCAPE_XML = 1<<18 , GF_PRINTARG_ESCAPE_PIPE = 1<<19 }

Functions
const GF_GPACArg *	gf_sys_get_options ()
u32	gf_sys_is_gpac_arg (const char *arg_name)
Bool	gf_sys_set_cfg_option (const char *opt_string)
void	gf_sys_print_arg (FILE *helpout, GF_SysPrintArgFlags flags, const GF_GPACArg *arg, const char *arg_subsystem)
void	gf_sys_print_core_help (FILE *helpout, GF_SysPrintArgFlags flags, GF_SysArgMode mode, u32 subsystem_flags)
const char *	gf_sys_localized (const char *sec_name, const char *str_name, const char *def_val)
void	gf_sys_format_help (FILE *output, GF_SysPrintArgFlags flags, const char *fmt,...)
Bool	gf_sys_word_match (const char *orig, const char *dst)

Detailed Description

Thiis section decribes functions useful when developing an application using libgpac such as:

• quick UTF8 conversion of arguments for main() on windows
• setting, checking and printing libgpac arguments as given from command line

---

Data Structure Documentation

GF_GPACArg

struct GF_GPACArg

structure holding a libgpac arg (not a filter arg)

Macro Definition Documentation

GF_MAIN_FUNC

#define GF_MAIN_FUNC

(

__fun

)

Value:

int main(int argc, char **argv) {\
        return __fun( argc, argv ); \
}

macro for main() with wide to char conversion on windows platforms

GF_GPAC_ARG_BASE

#define GF_GPAC_ARG_BASE

Value:

 \
        const char *name; \ \
        const char *altname; \ \
        const char *description; \ \
        const char *val; \ \
        const char *values; \ \
        u16 type; \ \
        u16 flags; \

macro defining fields of a libgpac arg (not a filter arg)

GF_ARG_HINT_ADVANCED

#define GF_ARG_HINT_ADVANCED   (1<<1)

argument is of advanced type

GF_ARG_HINT_EXPERT

#define GF_ARG_HINT_EXPERT   (1<<2)

argument is of expert type

GF_ARG_HINT_HIDE

#define GF_ARG_HINT_HIDE   (1<<3)

argument should not be presented in UIs

GF_ARG_HINT_EXPERIMENTAL

#define GF_ARG_HINT_EXPERIMENTAL   (1<<4)

argument is highly experimental

GF_ARG_SUBSYS_CORE

#define GF_ARG_SUBSYS_CORE   (1<<5)

argument applies to the libgpac core subsystem

GF_ARG_SUBSYS_LOG

#define GF_ARG_SUBSYS_LOG   (1<<6)

argument applies to the log subsystem

GF_ARG_SUBSYS_FILTERS

#define GF_ARG_SUBSYS_FILTERS   (1<<7)

argument applies to the filter subsystem

GF_ARG_SUBSYS_HTTP

#define GF_ARG_SUBSYS_HTTP   (1<<8)

argument applies to the HTTP subsystem

GF_ARG_SUBSYS_VIDEO

#define GF_ARG_SUBSYS_VIDEO   (1<<9)

argument applies to the video subsystem

GF_ARG_SUBSYS_AUDIO

#define GF_ARG_SUBSYS_AUDIO   (1<<10)

argument applies to the audio subsystem

GF_ARG_SUBSYS_TEXT

#define GF_ARG_SUBSYS_TEXT   (1<<11)

argument applies to the font and text subsystem

GF_ARG_SUBSYS_RMT

#define GF_ARG_SUBSYS_RMT   (1<<12)

argument applies to the remotery subsystem

GF_ARG_SUBSYS_HACKS

#define GF_ARG_SUBSYS_HACKS   (1<<13)

argument belongs to hack tools, usually never used

GF_ARG_BOOL

#define GF_ARG_BOOL   0

argument is a boolean

GF_ARG_INT

#define GF_ARG_INT   1

argument is a 32 bit integer

GF_ARG_DOUBLE

#define GF_ARG_DOUBLE   2

argument is a double

GF_ARG_STRING

#define GF_ARG_STRING   3

argument is a string

GF_ARG_STRINGS

#define GF_ARG_STRINGS   4

argument is a camma-separated list of strings

GF_ARG_4CC

#define GF_ARG_4CC   5

argument is a custom arg, default value contains the syntax of the argument

GF_ARG_4CCS

#define GF_ARG_4CCS   6

argument is a custom arg, default value contains the syntax of the argument

GF_ARG_CUSTOM

#define GF_ARG_CUSTOM   7

argument is a custom arg, default value contains the syntax of the argument

GF_DEF_ARG

#define GF_DEF_ARG	(		_a,
			_b,
			_c,
			_d,
			_e,
			_f,
			_g
	)		{_a, _b, _c, _d, _e, _f, _g}

macros for defining a GF_GPACArg argument

Enumeration Type Documentation

GF_SysArgMode

enum GF_SysArgMode

argument dump hint options

Enumerator
GF_ARGMODE_BASE	only dumps simple arguments
GF_ARGMODE_ADVANCED	only dumps advanced arguments
GF_ARGMODE_EXPERT	only dumps expert arguments
GF_ARGMODE_ALL	dumps all arguments

GF_SysPrintArgFlags

enum GF_SysPrintArgFlags

flags for help formatting

Enumerator
GF_PRINTARG_HIGHLIGHT_FIRST	first word in format string should be highlighted
GF_PRINTARG_NL_TO_BR	prints instead of new line
GF_PRINTARG_OPT_DESC	first word in format string is an option descripttor
GF_PRINTARG_IS_APP	the format string is an application string, not a gpac core one
GF_PRINTARG_ADD_DASH	insert an extra '-' at the beginning
GF_PRINTARG_NO_DASH	do not insert '-' before arg name
GF_PRINTARG_COLON	insert '-: before arg name
GF_PRINTARG_MD	the generation is for markdown
GF_PRINTARG_MAN	the generation is for man pages
GF_PRINTARG_ESCAPE_XML	XML < and > should be escaped (for markdown generation only)
GF_PRINTARG_ESCAPE_PIPE	'|' should be escaped (for markdown generation only)

Function Documentation

gf_sys_get_options()

const GF_GPACArg* gf_sys_get_options

(

)

gets the options defined for libgpac

Returns

array of options

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gf_sys_is_gpac_arg()

u32 gf_sys_is_gpac_arg

(

const char *

arg_name

)

check if the given option is a libgpac argument

Parameters

arg_name

name of the argument

Returns

0 if not a libgpac core option, 1 if option not consuming an argument, 2 if option consuming an argument

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gf_sys_set_cfg_option()

Bool gf_sys_set_cfg_option

(

const char *

opt_string

)

parses config string and update config accordingly

Parameters

opt_string

section/key/val formatted as Section:Key (discard key), Section:Key=null (discard key), Section:Key=Val (set key) or Section=null (discard section)

Returns

GF_TRUE if update is OK, GF_FALSE otherwise

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gf_sys_print_arg()

void gf_sys_print_arg	(	FILE *	helpout,
		GF_SysPrintArgFlags	flags,
		const GF_GPACArg *	arg,
		const char *	arg_subsystem
	)

prints a argument

Parameters

helpout	destination file - if NULL, uses stderr
flags	dump flags
arg	argument to print
arg_subsystem	name of subsystem of argument (core, gpac, filter name) for localization)

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gf_sys_print_core_help()

void gf_sys_print_core_help	(	FILE *	helpout,
		GF_SysPrintArgFlags	flags,
		GF_SysArgMode	mode,
		u32	subsystem_flags
	)

prints libgpac help for builton core options to stderr

Parameters

helpout	destination file - if NULL, uses stderr
flags	dump flags
mode	filtering mode based on argument type
subsystem_flags	filtering mode based on argument subsytem flags

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gf_sys_localized()

const char* gf_sys_localized	(	const char *	sec_name,
		const char *	str_name,
		const char *	def_val
	)

gets localized version of string identified by module name and identifier.

Parameters

sec_name	name of the module to query, such as "gpac", "core", or filter name
str_name	name of string to query, such as acore/app option or a filter argument
def_val	default value to return if no locaization exists

Returns

localized version of the string

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gf_sys_format_help()

void gf_sys_format_help	(	FILE *	output,
		GF_SysPrintArgFlags	flags,
		const char *	fmt,
			...
	)

formats help to output

Parameters

output	output file to dump to
flags	help formatting flags
fmt	arguments of the format

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gf_sys_word_match()

Bool gf_sys_word_match	(	const char *	orig,
		const char *	dst
	)

very basic word match, check the number of source characters in order in dest

Parameters

orig	word to test
dst	word to compare to

Returns

GF_TRUE if words are similar, GF_FALSE otherwise

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