Library configuration

Library configuration. More...

Collaboration diagram for Library configuration:

Enumerations
enum	GF_MemTrackerType { GF_MemTrackerNone = 0 , GF_MemTrackerSimple , GF_MemTrackerBackTrace }
enum	GF_ConsoleCodes {   GF_CONSOLE_RESET =0 , GF_CONSOLE_RED , GF_CONSOLE_GREEN , GF_CONSOLE_BLUE ,   GF_CONSOLE_YELLOW , GF_CONSOLE_CYAN , GF_CONSOLE_WHITE , GF_CONSOLE_MAGENTA ,   GF_CONSOLE_CLEAR , GF_CONSOLE_SAVE , GF_CONSOLE_RESTORE , GF_CONSOLE_BOLD = 1<<16 ,   GF_CONSOLE_ITALIC = 1<<17 , GF_CONSOLE_UNDERLINED = 1<<18 , GF_CONSOLE_STRIKE = 1<<19 }

Functions
GF_Err	gf_sys_init (GF_MemTrackerType mem_tracker_type, const char *profile)
	System setup. More...
void	gf_sys_close ()
	System closing. More...
GF_Err	gf_sys_set_args (s32 argc, const char **argv)
	System arguments. More...
u32	gf_sys_get_argc ()
	Get number of args. More...
const char **	gf_sys_get_argv ()
	Get program arguments. More...
const char *	gf_sys_get_arg (u32 arg)
	Get number of args. More...
const char *	gf_sys_find_global_arg (const char *arg)
	Locate a global filter arg. More...
void	gf_sys_mark_arg_used (s32 arg_idx, Bool used)
	Mark arg as used. More...
Bool	gf_sys_is_arg_used (s32 arg_idx)
	Check if arg is marked as used. More...
Bool	gf_sys_is_test_mode ()
	checks if test mode is enabled More...
Bool	gf_sys_old_arch_compat ()
	checks if compatibility with old arch is enabled More...
u32	gf_sys_is_quiet ()
	checks if running in quiet mode More...
const char *	gf_sys_features (Bool disabled)
Bool	gf_sys_solve_path (const char *tpl_path, char szPath[GF_MAX_PATH])
GF_Err	gf_sys_enable_rmtws (Bool start)
void	gf_sys_set_console_code (FILE *std, GF_ConsoleCodes code)
const char *	gf_opts_get_key (const char *secName, const char *keyName)
GF_Err	gf_opts_set_key (const char *secName, const char *keyName, const char *keyValue)
void	gf_opts_del_section (const char *secName)
u32	gf_opts_get_section_count ()
const char *	gf_opts_get_section_name (u32 secIndex)
u32	gf_opts_get_key_count (const char *secName)
const char *	gf_opts_get_key_name (const char *secName, u32 keyIndex)
Bool	gf_opts_get_bool (const char *secName, const char *keyName)
u32	gf_opts_get_int (const char *secName, const char *keyName)
const char *	gf_opts_get_key_restricted (const char *secName, const char *keyName)
GF_Err	gf_opts_discard_changes ()
GF_Err	gf_opts_save ()
const char *	gf_opts_get_filename ()
Bool	gf_opts_default_shared_directory (char *path_buffer)
GF_Err	gf_creds_check_password (const char *username, char *password)
Bool	gf_creds_check_membership (const char *username, const char *users, const char *groups)

Detailed Description

Library configuration.

These functions are used to initialize, shutdown and configure libgpac.

The library shall be initialized using gf_sys_init and terminated using gf_sys_close

The library can usually be configured from command line if your program uses gf_sys_set_args.

The library can also be configured from your program using gf_opts_set_key and related functions right after initializing the library.

For more information on configuration options, see

gpac -hx core 

and https://wiki.gpac.io/Filters/core_options

For more information on filters configuration options, see https://wiki.gpac.io/Filters/Filters

Enumeration Type Documentation

GF_MemTrackerType

enum GF_MemTrackerType

Selection flags for memory tracker

Enumerator
GF_MemTrackerNone	No memory tracking
GF_MemTrackerSimple	Memory tracking without backtrace
GF_MemTrackerBackTrace	Memory tracking with backtrace

GF_ConsoleCodes

enum GF_ConsoleCodes

GPAC Log tools

Describes the color code for console print

Enumerator
GF_CONSOLE_RESET	reset color
GF_CONSOLE_RED	set text to red
GF_CONSOLE_GREEN	set text to green
GF_CONSOLE_BLUE	set text to blue
GF_CONSOLE_YELLOW	set text to yellow
GF_CONSOLE_CYAN	set text to cyan
GF_CONSOLE_WHITE	set text to white
GF_CONSOLE_MAGENTA	set text to magenta
GF_CONSOLE_CLEAR	reset all console text
GF_CONSOLE_SAVE	save console state
GF_CONSOLE_RESTORE	restore console state
GF_CONSOLE_BOLD	set text to bold modifier
GF_CONSOLE_ITALIC	set text to italic
GF_CONSOLE_UNDERLINED	set text to underlined
GF_CONSOLE_STRIKE	set text to strikethrough

Function Documentation

gf_sys_init()

GF_Err gf_sys_init	(	GF_MemTrackerType	mem_tracker_type,
		const char *	profile
	)

System setup.

Inits system tools (GPAC global config, high-resolution clock if any, CPU usage manager, random number, ...).

You MUST call this function before calling any libgpac function, typically only once at startup.

The profile allows using a different global config file than the default, and may be a name (without / or \) or point to an existing config file.

Note

This can be called several times but only the first call will result in system setup.

Parameters

mem_tracker_type	memory tracking mode
profile	name of the profile to load, NULL for default.

Returns

Error code if any

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gf_sys_close()

void gf_sys_close

(

)

System closing.

Closes allocated system resources opened by gf_sys_init.

Note

This can be called several times but systems resources will be closed when no more users are accounted for.

When JavaScript APIs are loaded, the JS runtime is destroyed in this function call. If your application needs to reload GPAC a second time after this, you MUST prevent JS runtime destruction otherwise the application will crash due to static JS class definitions refering to freed memory. To prevent destruction, make sure you have called

gf_opts_set_key("temp", "static-jsrt", "true"); 

before calling gf_sys_close. For example:

gf_sys_init(GF_MemTrackerNone, NULL);
//run your code, eg a filter session
 
//prevent JSRT destruction
gf_opts_set_key("temp", "static-jsrt", "true");
gf_sys_close();
 
//The JSRT is still valid
 
gf_sys_init(GF_MemTrackerNone, NULL);
//run your code, eg another filter session
 
//do NOT prevent JSRT, parent app will exit after this call
gf_sys_close();

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gf_sys_set_args()

GF_Err gf_sys_set_args	(	s32	argc,
		const char **	argv
	)

System arguments.

Sets the user app arguments (used by GUI mode)

Parameters

argc	Number of arguments
argv	Array of arguments - the first string is ignored (considered to be the executable name)

Returns

error code if any, GF_OK otherwise

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gf_sys_get_argc()

u32 gf_sys_get_argc

(

)

Get number of args.

Gets the number of argument of the user application if any

Returns

number of argument of the user application

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gf_sys_get_argv()

const char** gf_sys_get_argv

(

)

Get program arguments.

Gets the arguments of the user application if any

Returns

argument of the user application

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gf_sys_get_arg()

const char* gf_sys_get_arg

(

u32

arg

)

Get number of args.

Gets the number of argument of the user application if any

Parameters

arg	Index of argument to retrieve

Returns

number of argument of the user application

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gf_sys_find_global_arg()

const char* gf_sys_find_global_arg

(

const char *

arg

)

Locate a global filter arg.

Looks for a filter option specified as global argument

Parameters

arg	name of option to search, without "--" or "-+" specififers

Returns

argument value string, empty string for booleans or NULL if not found

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gf_sys_mark_arg_used()

void gf_sys_mark_arg_used	(	s32	arg_idx,
		Bool	used
	)

Mark arg as used.

Marks the argument at given index as used. By default all args are marked as not used when assigning args

Parameters

arg_idx	Index of argument to mark
used	flag to set

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gf_sys_is_arg_used()

Bool gf_sys_is_arg_used

(

s32

arg_idx

)

Check if arg is marked as used.

Marks the argument at given index as used

Parameters

arg_idx

Index of argument to mark

Returns

used flag of the arg

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gf_sys_is_test_mode()

Bool gf_sys_is_test_mode

(

)

checks if test mode is enabled

Checks if test mode is enabled (no date nor GPAC version should be written).

Returns

GF_TRUE if test mode is enabled, GF_FALSE otherwise.

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gf_sys_old_arch_compat()

Bool gf_sys_old_arch_compat

(

)

checks if compatibility with old arch is enabled

Checks if compatibility with old arch is enabled - this function will be removed when master will be moved to filters branch

Returns

GF_TRUE if old arch compat is enabled, GF_FALSE otherwise.

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gf_sys_is_quiet()

u32 gf_sys_is_quiet

(

)

checks if running in quiet mode

Checks if quiet mode is enabled

Returns

2 if quiet mode is enabled, 1 if quiet mode not enabled but progress is disabled, 0 otherwise.

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gf_sys_features()

const char* gf_sys_features

(

Bool

disabled

)

gets GPAC feature list in this GPAC build

Parameters

disabled

if GF_TRUE, gets disabled features, otherwise gets enabled features

Returns

the list of features.

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gf_sys_solve_path()

Bool gf_sys_solve_path	(	const char *	tpl_path,
		char	szPath[GF_MAX_PATH]
	)

solves path starting with replacement keywords:

• $GDOCS: replaced by path to user document , OS-specific
  • application document directory for iOS
  • EXTERNAL_STORAGE environment variable if present or '/sdcard' otherwise for Android
  • user home directory for other platforms
• $GCFG: replaced by path to GPAC config directory for the current profile

Parameters

tpl_path	url to translate, must start with $GDOCS or $GCFG
szPath	path to store the result

Returns

GF_TRUE if success, GF_FALSE otherwise.

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gf_sys_enable_rmtws()

GF_EXPORT GF_Err gf_sys_enable_rmtws

(

Bool

start

)

Enables or disables the rmt websocket monitoring server

Parameters

start

If true starts the webserver, if false stops it

Returns

GF_OK if success, GF_BAD_PARAM if error, GF_NOT_SUPPORTED if ws server not supported

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gf_sys_set_console_code()

void gf_sys_set_console_code	(	FILE *	std,
		GF_ConsoleCodes	code
	)

sets console code

Parameters

std	the output stream (stderr or stdout)
code	the console code to set

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gf_opts_get_key()

const char* gf_opts_get_key	(	const char *	secName,
		const char *	keyName
	)

gets a global config key value from its section and name.

Parameters

secName	the desired key parent section name
keyName	the desired key name

Returns

the desired key value if found, NULL otherwise.

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gf_opts_set_key()

GF_Err gf_opts_set_key	(	const char *	secName,
		const char *	keyName,
		const char *	keyValue
	)

sets a global config key value from its section and name.

Parameters

secName	the desired key parent section name
keyName	the desired key name
keyValue	the desired key value

Note

this will also create both section and key if they are not found in the configuration file

Returns

error if any

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gf_opts_del_section()

void gf_opts_del_section

(

const char *

secName

)

removes all entries in the given section of the global config

Parameters

secName

the target section

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gf_opts_get_section_count()

u32 gf_opts_get_section_count

(

)

gets the number of sections in the global config

Returns

the number of sections

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gf_opts_get_section_name()

const char* gf_opts_get_section_name

(

u32

secIndex

)

gets a section name based on its index in the global config

Parameters

secIndex

0-based index of the section to query

Returns

the section name if found, NULL otherwise

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gf_opts_get_key_count()

u32 gf_opts_get_key_count

(

const char *

secName

)

gets the number of keys in a section of the global config

Parameters

secName

the target section

Returns

the number of keys in the section

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gf_opts_get_key_name()

const char* gf_opts_get_key_name	(	const char *	secName,
		u32	keyIndex
	)

gets the number of keys in a section of the global config

Parameters

secName	the target section
keyIndex	0-based index of the key in the section

Returns

the key name if found, NULL otherwise

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gf_opts_get_bool()

Bool gf_opts_get_bool	(	const char *	secName,
		const char *	keyName
	)

gets a global config boolean value from its section and name.

Parameters

secName	the desired key parent section name
keyName	the desired key name

Returns

the desired key value if found, GF_FALSE otherwise.

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gf_opts_get_int()

u32 gf_opts_get_int	(	const char *	secName,
		const char *	keyName
	)

gets a global config integer value from its section and name.

Parameters

secName	the desired key parent section name
keyName	the desired key name

Returns

the desired key value if found, 0 otherwise.

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gf_opts_get_key_restricted()

const char* gf_opts_get_key_restricted	(	const char *	secName,
		const char *	keyName
	)

gets a global config key value from its section and name.

Parameters

secName	the desired key parent section name
keyName	the desired key name

Returns

the desired key value if found and if the key is not restricted, NULL otherwise.

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gf_opts_discard_changes()

GF_Err gf_opts_discard_changes

(

)

Do not save modification to global options

Returns

error code

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gf_opts_save()

GF_Err gf_opts_save

(

)

Force immediate write of config

Returns

error code

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gf_opts_get_filename()

const char* gf_opts_get_filename

(

)

Returns file name of global config

Returns

file name of global config or NULL if libgpac is not initialized

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gf_opts_default_shared_directory()

Bool gf_opts_default_shared_directory

(

char *

path_buffer

)

Gets GPAC shared directory (gui, shaders, etc ..)

Parameters

path_buffer

GF_MAX_PATH buffer to store output

Returns

GF_TRUE if success, GF_FALSE otherwise

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gf_creds_check_password()

GF_Err gf_creds_check_password	(	const char *	username,
		char *	password
	)

Checks given user and password are valid

Parameters

username	user name
password	password

Returns

GF_OK if success, GF_NOT_FOUND if no such user or GF_AUTHENTICATION_FAILURE if wrong password

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gf_creds_check_membership()

Bool gf_creds_check_membership	(	const char *	username,
		const char *	users,
		const char *	groups
	)

Checks given user belongs to list of users or groups.

Parameters

username	user name
users	comma-seprated list of users to check, may be NULL
groups	comma-seprated list of groups to check, may be NULL

Returns

GF_TRUE if success, GF_FALSE otherwise

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