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GStreamer 0.10 Core Reference Manual | ![]() |
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#include <gst/gst.h> #define GST_PARAM_CONTROLLABLE #define GST_PARAM_USER_SHIFT #define GST_PARAM_MUTABLE_PAUSED #define GST_PARAM_MUTABLE_PLAYING #define GST_PARAM_MUTABLE_READY GstParamSpecFraction; 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);
#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.
#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.
#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.
Since 0.10.23
#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.
Since 0.10.23
#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.
Since 0.10.23
typedef struct { GParamSpec parent_instance; gint min_num, min_den; gint max_num, max_den; gint def_num, def_den; } GstParamSpecFraction;
A GParamSpec derived structure that contains the meta data for fractional properties.
GParamSpec parent_instance ; |
super class |
gint min_num ; |
minimal numerator |
gint min_den ; |
minimal denominator |
gint max_num ; |
maximal numerator |
gint max_den ; |
maximal denominator |
gint def_num ; |
default numerator |
gint def_den ; |
default denominator |
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.
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 : | a newly created parameter specification |
Since 0.10.14