GstParamSpec

GParamSpec implementations specific to GStreamer.

GstParamArray 

GParamSpec
    ╰──GstParamArray

A fundamental type that describes a GParamSpec for arrays of values

Since : 1.12

GstParamFraction 

GParamSpec
    ╰──GstParamFraction

A fundamental type that describes a GParamSpec for fractional properties

GstParamSpecArray

A GParamSpec derived structure for arrays of values.

Members

parent_instance (GParamSpec) –

super class

element_spec (GParamSpec *) –

the GParamSpec of the type of values in the array

GstParamSpecFraction

A GParamSpec derived structure that contains the meta data for fractional properties.

Members

parent_instance (GParamSpec) –

super class

min_num (gint) –

minimal numerator

min_den (gint) –

minimal denominator

max_num (gint) –

maximal numerator

max_den (gint) –

maximal denominator

def_num (gint) –

default numerator

def_den (gint) –

default denominator

Functions

gst_param_spec_array 

GParamSpec *
gst_param_spec_array (const gchar * name,
                      const gchar * nick,
                      const gchar * blurb,
                      GParamSpec * element_spec,
                      GParamFlags flags)

This function creates a GstArray GParamSpec for use by objects/elements that want to expose properties of GstArray type. This function is typically * used in connection with g_object_class_install_property in a GObjects's instance_init function.

Parameters:

name –

canonical name of the property specified

nick –

nick name for the property specified

blurb –

description of the property specified

element_spec –

GParamSpec of the array

flags –

flags for the property specified

Returns ( [transfer: full]) –

a newly created parameter specification

Since : 1.14

gst_param_spec_fraction 

GParamSpec *
gst_param_spec_fraction (const gchar * name,
                         const gchar * nick,
                         const gchar * blurb,
                         gint min_num,
                         gint min_denom,
                         gint max_num,
                         gint max_denom,
                         gint default_num,
                         gint default_denom,
                         GParamFlags flags)

This function creates a fraction GParamSpec for use by objects/elements that want to expose properties of fraction type. This function is typically used in connection with g_object_class_install_property in a GObjects's instance_init function.

Parameters:

name –

canonical name of the property specified

nick –

nick name for the property specified

blurb –

description of the property specified

min_num –

minimum value (fraction numerator)

min_denom –

minimum value (fraction denominator)

max_num –

maximum value (fraction numerator)

max_denom –

maximum value (fraction denominator)

default_num –

default value (fraction numerator)

default_denom –

default value (fraction denominator)

flags –

flags for the property specified

Returns ( [transfer: full][nullable]) –

a newly created parameter specification

Function Macros

GST_IS_PARAM_SPEC_ARRAY_LIST 

#define GST_IS_PARAM_SPEC_ARRAY_LIST(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), GST_TYPE_PARAM_ARRAY_LIST))

GST_PARAM_SPEC_ARRAY_LIST 

#define GST_PARAM_SPEC_ARRAY_LIST(pspec)    (G_TYPE_CHECK_INSTANCE_CAST ((pspec), GST_TYPE_PARAM_ARRAY_LIST, GstParamSpecArray))

Constants

GST_PARAM_CONDITIONALLY_AVAILABLE 

#define GST_PARAM_CONDITIONALLY_AVAILABLE  (1 << (G_PARAM_USER_SHIFT + 6))

Use this flag on GObject properties of GstObject to indicate that they might not be available depending on environment such as OS, device, etc, so such properties will be installed conditionally only if the GstObject is able to support it.

Since : 1.18

GST_PARAM_CONTROLLABLE 

#define GST_PARAM_CONTROLLABLE	(1 << (G_PARAM_USER_SHIFT + 1))

Use this flag on GObject properties to signal they can make sense to be. controlled over time. This hint is used by the GstController.

GST_PARAM_DOC_SHOW_DEFAULT 

#define GST_PARAM_DOC_SHOW_DEFAULT  (1 << (G_PARAM_USER_SHIFT + 5))

Use this flag on GObject properties of GstObject to indicate that during gst-inspect and friends, the default value should be used as default instead of the current value.

Since : 1.18

GST_PARAM_MUTABLE_PAUSED 

#define GST_PARAM_MUTABLE_PAUSED  (1 << (G_PARAM_USER_SHIFT + 3))

Use this flag on GObject properties of GstElements to indicate that they can be changed when the element is in the PAUSED or lower state. This flag implies GST_PARAM_MUTABLE_READY.

GST_PARAM_MUTABLE_PLAYING 

#define GST_PARAM_MUTABLE_PLAYING  (1 << (G_PARAM_USER_SHIFT + 4))

Use this flag on GObject properties of GstElements to indicate that they can be changed when the element is in the PLAYING or lower state. This flag implies GST_PARAM_MUTABLE_PAUSED.

GST_PARAM_MUTABLE_READY 

#define GST_PARAM_MUTABLE_READY  (1 << (G_PARAM_USER_SHIFT + 2))

Use this flag on GObject properties of GstElements to indicate that they can be changed when the element is in the READY or lower state.

GST_PARAM_USER_SHIFT 

#define GST_PARAM_USER_SHIFT	(1 << (G_PARAM_USER_SHIFT + 8))

Bits based on GST_PARAM_USER_SHIFT can be used by 3rd party applications.

GST_TYPE_PARAM_ARRAY_LIST 

#define GST_TYPE_PARAM_ARRAY_LIST           (gst_param_spec_array_get_type ())

GST_TYPE_PARAM_FRACTION 

#define GST_TYPE_PARAM_FRACTION           (gst_param_spec_fraction_get_type ())

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