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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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330 lines
5 KiB
Plaintext
330 lines
5 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GstInfo
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<!-- ##### SECTION Short_Description ##### -->
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info/debugging/error handling
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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gstinfo.c contains a number of debuggins subsystems.
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</para>
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<para>The INFO subsystem is used to provide informative printouts to
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application and plugin developers. These messages can be enabled and
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disabled via a category system, which is a bitmask enabling you to turn
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on and off any subset of categories.</para>
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<para>The DEBUG subsystem is similar, but is intended for core developers
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and those writing more complex pipelines or filters. It uses the same
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category system, but must be enabled at configure time else it's not
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compiled into the library. autogen.sh automatically enables the DEBUG
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subsystem.
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</para>
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<para>The ERROR subsystem doesn't use categories, but will print out a
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more verbose message, and attempt to print out a stack trace of the error
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before aborting the application.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### FUNCTION gst_get_category_name ##### -->
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<para>
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</para>
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@category:
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@Returns:
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<!-- ##### FUNCTION gst_info_get_categories ##### -->
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<para>
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</para>
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@Returns:
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<!-- ##### FUNCTION gst_info_set_categories ##### -->
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<para>
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</para>
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@categories:
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<!-- ##### FUNCTION gst_info_enable_category ##### -->
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<para>
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</para>
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@category:
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<!-- ##### FUNCTION gst_info_disable_category ##### -->
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<para>
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</para>
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@category:
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<!-- ##### FUNCTION gst_default_info_handler ##### -->
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<para>
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</para>
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@category:
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@file:
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@function:
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@line:
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@debug_string:
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@element:
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@string:
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<!-- ##### MACRO GST_INFO_ENABLED ##### -->
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<para>
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When defined, INFO printouts are compiled into the library.
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</para>
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<!-- ##### MACRO GST_INFO ##### -->
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<para>
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Print out any information usable at run-time by application developers.
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</para>
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@cat: the GST_CAT_... category for the information
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### MACRO GST_INFO_ELEMENT ##### -->
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<para>
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Print out information like #GST_INFO, but with an element pointer to clarify things.
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</para>
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@cat: the GST_CAT_... category for the information
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@element: pointer to the #GstElement in question
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### FUNCTION gst_debug_get_categories ##### -->
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<para>
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</para>
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@Returns:
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<!-- ##### FUNCTION gst_debug_set_categories ##### -->
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<para>
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</para>
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@categories:
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<!-- ##### FUNCTION gst_debug_enable_category ##### -->
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<para>
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</para>
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@category:
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<!-- ##### FUNCTION gst_debug_disable_category ##### -->
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<para>
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</para>
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@category:
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<!-- ##### MACRO GST_DEBUG_SET_STRING ##### -->
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<para>
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Set the debug string for the current function, typically containing the arguments
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to the current function, i.e. "('element')"
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</para>
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### MACRO GST_DEBUG_ENTER ##### -->
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<para>
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Called at the beginning of a function, it simply prints out a DEBUG string of "entering"
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in addition to the given string.
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</para>
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### MACRO GST_DEBUG_ENTER_STRING ##### -->
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<para>
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Combine #GST_DEBUG_ENTER and #GST_DEBUG_SET_STRING.
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</para>
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<!-- ##### MACRO GST_DEBUG_LEAVE ##### -->
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<para>
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</para>
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@format:
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@args...:
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<!-- ##### MACRO GST_DEBUG_LEAVE_STRING ##### -->
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<para>
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</para>
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<!-- ##### MACRO GST_DEBUG_NOPREFIX ##### -->
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<para>
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</para>
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@cat:
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@format:
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@args...:
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<!-- ##### MACRO GST_DEBUG ##### -->
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<para>
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Print out debugging information.
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</para>
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@cat: the GST_CAT_... the debug falls within
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### MACRO GST_DEBUG_ENABLE_CATEGORIES ##### -->
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<para>
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</para>
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<!-- ##### MACRO GST_DEBUG_FUNCPTR ##### -->
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<para>
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</para>
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@ptr:
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<!-- ##### MACRO GST_DEBUG_PREFIX ##### -->
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<para>
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</para>
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@cat:
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@format:
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@args...:
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<!-- ##### MACRO GST_DEBUG_ENABLED ##### -->
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<para>
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</para>
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<!-- ##### MACRO GST_DEBUG_FUNCPTR_NAME ##### -->
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<para>
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</para>
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@ptr:
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<!-- ##### MACRO GST_DEBUG_PAD_NAME ##### -->
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<para>
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</para>
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@pad:
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<!-- ##### MACRO GST_ERROR ##### -->
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<para>
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Print out an error condition and abort the application.
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</para>
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@element: the #GstElement in question
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### MACRO GST_ERROR_OBJECT ##### -->
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<para>
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Print out an error condition and abort the application.
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</para>
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@element: the #GstElement in question
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@object: pointer to a 'contributing' object
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@format: printf-style format string
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@args...: printf arguments
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<!-- ##### MACRO GST_DEBUG_CHAR_MODE ##### -->
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<para>
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</para>
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<!-- ##### FUNCTION gst_default_error_handler ##### -->
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<para>
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</para>
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@file:
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@function:
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@line:
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@debug_string:
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@element:
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@object:
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@string:
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<!-- ##### USER_FUNCTION GstInfoHandler ##### -->
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<para>
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</para>
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@category:
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@file:
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@function:
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@line:
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@debug_string:
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@element:
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@string:
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<!-- ##### USER_FUNCTION GstErrorHandler ##### -->
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<para>
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</para>
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@file:
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@function:
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@line:
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@debug_string:
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@element:
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@object:
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@string:
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