Logging tools

Logging System. More...

Collaboration diagram for Logging tools:

Data Structures
struct	GF_LogExtra
	Extra log instructions. More...

Macros
#define	GF_LOG(_log_level, _log_tools, __args)
	Message logging. More...

Typedefs
typedef void(*	gf_log_cbk) (void *cbck, GF_LOG_Level log_level, GF_LOG_Tool log_tool, const char *fmt, va_list vlist)
	Log Message Callback. More...

Enumerations
enum	GF_LOG_Level {   GF_LOG_QUIET = 0 , GF_LOG_ERROR , GF_LOG_WARNING , GF_LOG_INFO ,   GF_LOG_DEBUG }
	GPAC Log Levels. More...
enum	GF_LOG_Tool {   GF_LOG_CORE = 0 , GF_LOG_CODING , GF_LOG_CONTAINER , GF_LOG_NETWORK ,   GF_LOG_HTTP , GF_LOG_RTP , GF_LOG_CODEC , GF_LOG_PARSER ,   GF_LOG_MEDIA , GF_LOG_SCENE , GF_LOG_SCRIPT , GF_LOG_INTERACT ,   GF_LOG_COMPOSE , GF_LOG_COMPTIME , GF_LOG_CACHE , GF_LOG_MMIO ,   GF_LOG_RTI , GF_LOG_MEMORY , GF_LOG_AUDIO , GF_LOG_MODULE ,   GF_LOG_MUTEX , GF_LOG_CONDITION , GF_LOG_DASH , GF_LOG_FILTER ,   GF_LOG_SCHEDULER , GF_LOG_ROUTE , GF_LOG_CONSOLE , GF_LOG_APP ,   GF_LOG_ALL , GF_LOG_TOOL_MAX = GF_LOG_ALL , GF_LOG_TOOL_UNDEFINED }
	GPAC Log tools. More...

Functions
Bool	gf_log_set_strict_error (Bool strict)
	Log exits at first error assignment. More...
char *	gf_log_get_tools_levels (void)
	gets string-formatted log tools More...
void	gf_log_set_tool_level (GF_LOG_Tool log_tool, GF_LOG_Level log_level)
	Log modules assignment. More...
gf_log_cbk	gf_log_set_callback (void *usr_cbk, gf_log_cbk cbk)
	Log overwrite. More...
Bool	gf_log_tool_level_on (GF_LOG_Tool log_tool, GF_LOG_Level log_level)
	Log level checking. More...
const char *	gf_log_tool_name (GF_LOG_Tool log_tool)
	Log tool name. More...
u32	gf_log_get_tool_level (GF_LOG_Tool log_tool)
	Log level getter. More...
GF_Err	gf_log_set_tools_levels (const char *log_tools_levels, Bool reset_all)
	Set log tools and levels. More...
GF_Err	gf_log_modify_tools_levels (const char *val)
	Modify log tools and levels. More...
Bool	gf_log_use_color ()
	Checks if color logs is enabled. More...
Bool	gf_log_use_file ()
	Checks if logs are stored to file. More...
u32	gf_log_parse_tool (const char *logs)
	Parses a log tool. More...
void	gf_log_reset_file ()
	Resets log file Resets log file if any log file name was specified, by closing and reopening a new file. More...
void	gf_log_push_extra (const GF_LogExtra *log)
void	gf_log_pop_extra (const GF_LogExtra *log)
void	gf_log_reset_extras ()

Detailed Description

---

Data Structure Documentation

GF_LogExtra

struct GF_LogExtra

Data Fields
u32	nb_tools	number of tools and levels
GF_LOG_Tool *	tools	additionnal tools
GF_LOG_Level *	levels	additionnal levels for the tools
Bool	strict	exit if error

Macro Definition Documentation

GF_LOG

#define GF_LOG	(		_log_level,
			_log_tools,
			__args
	)

Macro for logging messages. Usage is GF_LOG(log_lev, log_module, (fmt, ...)). The log function is only called if log filtering allows it. This avoids fetching logged parameters when the tool is not being logged.

Typedef Documentation

gf_log_cbk

typedef void(* gf_log_cbk) (void *cbck, GF_LOG_Level log_level, GF_LOG_Tool log_tool, const char *fmt, va_list vlist)

The gf_log_cbk type is the type for the callback of the gf_log_set_callback function. By default all logs are redirected to stderr

Parameters

cbck	Opaque user data.
log_level	level of the log. This value is not guaranteed in multi-threaded context.
log_tool	tool emitting the log. This value is not guaranteed in multi-threaded context.
fmt	message log format.
vlist	message log param.

Enumeration Type Documentation

GF_LOG_Level

enum GF_LOG_Level

These levels describes messages priority used when filtering logs

Enumerator
GF_LOG_QUIET	Disable all Log message
GF_LOG_ERROR	Log message describes an error
GF_LOG_WARNING	Log message describes a warning
GF_LOG_INFO	Log message is informational (state, etc..)
GF_LOG_DEBUG	Log message is a debug info

GF_LOG_Tool

enum GF_LOG_Tool

These flags describes which sub-part of GPAC generates the log and are used when filtering logs

Enumerator
GF_LOG_CORE	Log message from the core library (init, threads, network calls, etc)
GF_LOG_CODING	Log message from a raw media parser (BIFS, LASeR, A/V formats)
GF_LOG_CONTAINER	Log message from a bitstream parser (IsoMedia, MPEG-2 TS, OGG, ...)
GF_LOG_NETWORK	Log message from the network/service stack (messages & co)
GF_LOG_HTTP	Log message from the HTTP stack
GF_LOG_RTP	Log message from the RTP/RTCP stack (TS info) and packet structure & hinting (debug)
GF_LOG_CODEC	Log message from a codec
GF_LOG_PARSER	Log message from any textual (XML, ...) parser (context loading, etc)
GF_LOG_MEDIA	Generic log message from a filter (not from filter core library)
GF_LOG_SCENE	Log message from the scene graph/scene manager (handling of nodes and attribute modif, DOM core)
GF_LOG_SCRIPT	Log message from the scripting engine APIs - does not cover alert() in the script code itself
GF_LOG_INTERACT	Log message from event handling
GF_LOG_COMPOSE	Log message from compositor
GF_LOG_COMPTIME	Log message from the compositor, indicating media object state
GF_LOG_CACHE	Log for video object cache
GF_LOG_MMIO	Log message from multimedia I/O devices (audio/video input/output, ...)
GF_LOG_RTI	Log for runtime info (times, memory, CPU usage)
GF_LOG_MEMORY	Log for memory tracker
GF_LOG_AUDIO	Log for audio compositor
GF_LOG_MODULE	Generic Log for modules
GF_LOG_MUTEX	Log for threads and mutexes
GF_LOG_CONDITION	Log for threads and condition
GF_LOG_DASH	Log for all HTTP streaming
GF_LOG_FILTER	Log for all messages from filter core library (not from a filter)
GF_LOG_SCHEDULER	Log for filter scheduler only
GF_LOG_ROUTE	Log for all ROUTE message
GF_LOG_CONSOLE	Log for all messages coming from script
GF_LOG_APP	Log for all messages coming the application, not used by libgpac or the modules
GF_LOG_ALL	special value used to set a level for all tools
GF_LOG_TOOL_MAX
GF_LOG_TOOL_UNDEFINED

Function Documentation

gf_log_set_strict_error()

Bool gf_log_set_strict_error

(

Bool

strict

)

When GF_LOG_ERROR happens, program leaves with instruction exit(1);

Parameters

strict

strict behavior when encoutering a serious error.

Returns

old value before the call.

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gf_log_get_tools_levels()

char* gf_log_get_tools_levels

(

void

)

Gets the string-formatted log tools and levels. Returned string shall be freed by the caller.

Returns

string-formatted log tools.

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gf_log_set_tool_level()

void gf_log_set_tool_level	(	GF_LOG_Tool	log_tool,
		GF_LOG_Level	log_level
	)

Sets the tools to be checked for log filtering. By default no logging is performed.

Parameters

log_tool	the tool to be logged
log_level	the level of logging for this tool

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gf_log_set_callback()

gf_log_cbk gf_log_set_callback	(	void *	usr_cbk,
		gf_log_cbk	cbk
	)

Assigns a user-defined callback for printing log messages. By default all logs are redirected to stderr

Parameters

usr_cbk	Opaque user data
cbk	Callback log function

Returns

previous callback function

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gf_log_tool_level_on()

Bool gf_log_tool_level_on	(	GF_LOG_Tool	log_tool,
		GF_LOG_Level	log_level
	)

Checks if a given tool is logged for the given level

Parameters

log_tool	tool to check
log_level	level to check

Returns

1 if logged, 0 otherwise

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gf_log_tool_name()

const char* gf_log_tool_name

(

GF_LOG_Tool

log_tool

)

Gets log tool name

Parameters

log_tool

tool to check

Returns

name, or "unknwon" if not known

gf_log_get_tool_level()

u32 gf_log_get_tool_level

(

GF_LOG_Tool

log_tool

)

Gets log level of a given tool

Parameters

log_tool

tool to check

Returns

log level of tool

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gf_log_set_tools_levels()

GF_Err gf_log_set_tools_levels	(	const char *	log_tools_levels,
		Bool	reset_all
	)

Set log tools and levels according to the log_tools_levels string.

Parameters

log_tools_levels	string specifying the tools and levels. It is formatted as logToolX@logLevelX:logToolZ@logLevelZ:...
reset_all	if GF_TRUE, all previous log settings are discarded.

Returns

GF_OK or GF_BAD_PARAM

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gf_log_modify_tools_levels()

GF_Err gf_log_modify_tools_levels

(

const char *

val

)

Modify log tools and levels according to the log_tools_levels string. Previous log settings are kept.

Parameters

val	string specifying the tools and levels. It is formatted as logToolX@logLevelX:logToolZ@logLevelZ:...

Returns

GF_OK or GF_BAD_PARAM

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gf_log_use_color()

Bool gf_log_use_color

(

)

Checks if color logs is enabled

Returns

GF_TRUE if color logs are used

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gf_log_use_file()

Bool gf_log_use_file

(

)

Checks if logs are stored to file

Returns

GF_TRUE if logs are stored to file

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gf_log_parse_tool()

u32 gf_log_parse_tool

(

const char *

logs

)

Parses a log tool by name

Parameters

logs	the name to parse

Returns

log tool value

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gf_log_reset_file()

void gf_log_reset_file

(

)

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gf_log_push_extra()

void gf_log_push_extra

(

const GF_LogExtra *

log

)

Register a new extra log levels

Parameters

log	extra levels to add - may be NULL but shall be valid until call to gf_log_pop_extra or gf_log_reset_extras or end of app

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gf_log_pop_extra()

void gf_log_pop_extra

(

const GF_LogExtra *

log

)

Unregister an extra log levels

Parameters

log	extra levels to add - may be NULL

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gf_log_reset_extras()

void gf_log_reset_extras

(

)

Unregister all extra log levels

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