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<title>GstParamSpec: GStreamer 1.0 Core Reference Manual</title>
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Description
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GstParamSpec
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GstParamSpec — GParamSpec implementations specific
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to GStreamer
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Functions
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GParamSpec *
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gst_param_spec_fraction ()
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GParamSpec *
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gst_param_spec_array ()
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Types and Values
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#define
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GST_PARAM_CONTROLLABLE
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#define
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GST_PARAM_USER_SHIFT
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#define
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GST_PARAM_MUTABLE_PAUSED
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#define
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GST_PARAM_MUTABLE_PLAYING
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#define
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GST_PARAM_MUTABLE_READY
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struct
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GstParamSpecFraction
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struct
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GstParamSpecArray
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Includes
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#include <gst/gst.h>
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Description
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GParamSpec implementations specific to GStreamer.
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Functions
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gst_param_spec_fraction ()
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GParamSpec *
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gst_param_spec_fraction (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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gint min_num,
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gint min_denom,
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gint max_num,
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gint max_denom,
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gint default_num,
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gint default_denom,
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GParamFlags flags);
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This function creates a fraction GParamSpec for use by objects/elements
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that want to expose properties of fraction type. This function is typically
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used in connection with g_object_class_install_property() in a GObjects's
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instance_init function.
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Parameters
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name
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canonical name of the property specified
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nick
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nick name for the property specified
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blurb
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description of the property specified
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min_num
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minimum value (fraction numerator)
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min_denom
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minimum value (fraction denominator)
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max_num
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maximum value (fraction numerator)
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max_denom
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maximum value (fraction denominator)
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default_num
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default value (fraction numerator)
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default_denom
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default value (fraction denominator)
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flags
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flags for the property specified
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Returns
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a newly created parameter specification.
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[transfer full][nullable]
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gst_param_spec_array ()
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GParamSpec *
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gst_param_spec_array (const gchar *name,
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const gchar *nick,
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const gchar *blurb,
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GParamSpec *element_spec,
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GParamFlags flags);
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This function creates a GstArray GParamSpec for use by objects/elements
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typically * used in connection with g_object_class_install_property() in a
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GObjects's instance_init function.
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Parameters
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name
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canonical name of the property specified
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nick
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nick name for the property specified
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blurb
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description of the property specified
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element_spec
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GParamSpec of the array
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flags
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flags for the property specified
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Returns
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a newly created parameter specification.
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[transfer full]
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Since: 1.14
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Types and Values
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GST_PARAM_CONTROLLABLE
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#define GST_PARAM_CONTROLLABLE (1 << (G_PARAM_USER_SHIFT + 1))
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Use this flag on GObject properties to signal they can make sense to be.
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controlled over time. This hint is used by the GstController.
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GST_PARAM_USER_SHIFT
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#define GST_PARAM_USER_SHIFT (1 << (G_PARAM_USER_SHIFT + 8))
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Bits based on GST_PARAM_USER_SHIFT can be used by 3rd party applications.
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GST_PARAM_MUTABLE_PAUSED
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#define GST_PARAM_MUTABLE_PAUSED (1 << (G_PARAM_USER_SHIFT + 3))
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Use this flag on GObject properties of GstElements to indicate that
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they can be changed when the element is in the PAUSED or lower state.
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This flag implies GST_PARAM_MUTABLE_READY.
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GST_PARAM_MUTABLE_PLAYING
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#define GST_PARAM_MUTABLE_PLAYING (1 << (G_PARAM_USER_SHIFT + 4))
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Use this flag on GObject properties of GstElements to indicate that
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they can be changed when the element is in the PLAYING or lower state.
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This flag implies GST_PARAM_MUTABLE_PAUSED.
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GST_PARAM_MUTABLE_READY
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#define GST_PARAM_MUTABLE_READY (1 << (G_PARAM_USER_SHIFT + 2))
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Use this flag on GObject properties of GstElements to indicate that
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they can be changed when the element is in the READY or lower state.
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struct GstParamSpecFraction
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struct GstParamSpecFraction {
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GParamSpec parent_instance;
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gint min_num, min_den;
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gint max_num, max_den;
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gint def_num, def_den;
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};
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A GParamSpec derived structure that contains the meta data for fractional
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properties.
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Members
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gint min_num;
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minimal numerator
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gint min_den;
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minimal denominator
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gint max_num;
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maximal numerator
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gint max_den;
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maximal denominator
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gint def_num;
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default numerator
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gint def_den;
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default denominator
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struct GstParamSpecArray
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struct GstParamSpecArray {
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GParamSpec parent_instance;
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GParamSpec * element_spec;
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};
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A GParamSpec derived structure for arrays of values.
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Members
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GParamSpec *element_spec;
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the GParamSpec of the type of values in the array
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