Gst::CoreError Class Reference

The GStreamer core GError type. More...

#include <gstreamermm/error.h>

Inherits Error.

Public Types
enum	Code {   FAILED = 1,   TOO_LAZY,   NOT_IMPLEMENTED,   STATE_CHANGE,   PAD,   THREAD,   NEGOTIATION,   EVENT,   SEEK,   CAPS,   TAG,   MISSING_PLUGIN,   CLOCK,   DISABLED,   NUM_ERRORS }
	Core errors are errors inside the core GStreamer library. More...

Public Member Functions
	CoreError (Code error_code, const Glib::ustring& error_message)
	CoreError (GError* gobject)
Code	code () const

Detailed Description

The GStreamer core GError type.

GStreamer elements can throw non-fatal warnings and fatal errors. Higher-level elements and applications can programatically filter the ones they are interested in or can recover from, and have a default handler handle the rest of them. Both warnings and fatal errors are treated similarly.

Core errors are errors inside the core GStreamer library:

• FAILED - a general error which doesn't fit in any other category. Make sure you add a custom message to the error call.
• TOO_LAZY - do not use this except as a placeholder for deciding where to go while developing code.
• NOT_IMPLEMENTED - use this when you do not want to implement this functionality yet.
• STATE_CHANGE - used for state change errors.
• PAD - used for pad-related errors.
• THREAD - used for thread-related errors.
• NEGOTIATION - used for negotiation-related errors.
• EVENT - used for event-related errors.
• SEEK - used for seek-related errors.
• CAPS - used for caps-related errors.
• TAG - used for negotiation-related errors.
• MISSING_PLUGIN - used if a plugin is missing.
• CLOCK - used for clock related errors.
• DISABLED - used if functionality has been disabled at compile time (Since: 0.10.13).
• NUM_ERRORS - the number of core error types.

Elements do not have the context required to decide what to do with errors. As such, they should only inform about errors, and stop their processing. In short, an element doesn't know what it is being used for.

It is the application or compound element using the given element that has more context about the use of the element. Errors can be received by listening to the Gst::Bus of the element/pipeline for Gst::Message objects with the type Gst::MESSAGE_ERROR or Gst::MESSAGE_WARNING. The thrown errors should be inspected, and filtered if appropriate.

An application is expected to, by default, present the user with a dialog box (or an equivalent) showing the error message. The dialog should also allow a way to get at the additional debug information, so the user can provide bug reporting information.

A compound element is expected to forward errors by default higher up the hierarchy; this is done by default in the same way as for other types of Gst::Message.

When applications or compound elements trigger errors that they can recover from, they can filter out these errors and take appropriate action. For example, an application that gets an error from xvimagesink that indicates all XVideo ports are taken, the application can attempt to use another sink instead.

Member Enumeration Documentation

Code

enum Gst::CoreError::Code

Core errors are errors inside the core GStreamer library.

Enumerator
FAILED	A general error which doesn't fit in any other category. Make sure you add a custom message to the error call.
TOO_LAZY	Do not use this except as a placeholder for deciding where to go while developing code.
NOT_IMPLEMENTED	Use this when you do not want to implement this functionality yet.
STATE_CHANGE	Used for state change errors.
PAD	Used for pad-related errors.
THREAD	Used for thread-related errors.
NEGOTIATION	Used for negotiation-related errors.
EVENT	Used for event-related errors.
SEEK	Used for seek-related errors.
CAPS	Used for caps-related errors.
TAG	Used for negotiation-related errors.
MISSING_PLUGIN	Used if a plugin is missing.
CLOCK	Used for clock related errors.
DISABLED	Used if functionality has been disabled at compile time.
NUM_ERRORS	The number of core error types.

Constructor & Destructor Documentation

CoreError() [1/2]

Gst::CoreError::CoreError	(	Code	error_code,
		const Glib::ustring &	error_message
	)

CoreError() [2/2]

Gst::CoreError::CoreError ( GError *  gobject )

explicit

Member Function Documentation

code()

Code Gst::CoreError::code

(

)

const