GstParamSpec

GstParamSpec — GParamSpec implementations specific to GStreamer

Functions

Types and Values

Object Hierarchy


Includes

#include <gst/gst.h>

Description

GParamSpec implementations specific to GStreamer.

Last reviewed on 2008-03-11 (0.10.18)

Functions

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_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

a newly created parameter specification.

[transfer full]

Types and Values

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_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.


struct GstParamSpecFraction

struct GstParamSpecFraction {
  GParamSpec    parent_instance;

  gint          min_num, min_den;
  gint          max_num, max_den;
  gint          def_num, def_den;
};

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

Members

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