*/
/**
* SECTION:gstdirectcontrolbinding
+ * @title: GstDirectControlBinding
* @short_description: direct attachment for control sources
*
* A value mapping object that attaches control sources to gobject properties. It
- * will map the control values [0.0 ... 1.0] to the target property range. If a
- * control value is outside of the range, it will be clipped.
+ * will map the control values directly to the target property range. If a
+ * non-absolute direct control binding is used, the value range [0.0 ... 1.0]
+ * is mapped to full target property range, and all values outside the range
+ * will be clipped. An absolute control binding will not do any value
+ * transformations.
*/
#include <glib-object.h>
#define GST_CAT_DEFAULT control_binding_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
static GObject *gst_direct_control_binding_constructor (GType type,
guint n_construct_params, GObjectConstructParam * construct_params);
static void gst_direct_control_binding_set_property (GObject * object,
{
PROP_0,
PROP_CS,
+ PROP_ABSOLUTE,
PROP_LAST
};
\
s = CLAMP (s, 0.0, 1.0); \
*d = (g##type) ROUNDING_OP (pspec->minimum * (1-s)) + (g##type) ROUNDING_OP (pspec->maximum * s); \
+} \
+\
+static void \
+abs_convert_g_value_to_##type (GstDirectControlBinding *self, gdouble s, GValue *d) \
+{ \
+ g##type v; \
+ v = (g##type) ROUNDING_OP (s); \
+ g_value_set_##type (d, v); \
+} \
+\
+static void \
+abs_convert_value_to_##type (GstDirectControlBinding *self, gdouble s, gpointer d_) \
+{ \
+ g##type *d = (g##type *)d_; \
+ *d = (g##type) ROUNDING_OP (s); \
}
-
DEFINE_CONVERT (int, Int, INT, rint);
DEFINE_CONVERT (uint, UInt, UINT, rint);
DEFINE_CONVERT (long, Long, LONG, rint);
properties[PROP_CS] =
g_param_spec_object ("control-source", "ControlSource",
"The control source",
- GST_TYPE_CONTROL_SOURCE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+ GST_TYPE_CONTROL_SOURCE,
+ G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
+
+ properties[PROP_ABSOLUTE] =
+ g_param_spec_boolean ("absolute", "Absolute",
+ "Whether the control values are absolute",
+ FALSE,
+ G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class, PROP_LAST, properties);
}
GST_DEBUG (" using type %s", g_type_name (base));
/* select mapping function */
+
+#define SET_CONVERT_FUNCTION(type) \
+ if (self->ABI.abi.want_absolute) { \
+ self->convert_g_value = abs_convert_g_value_to_##type; \
+ self->convert_value = abs_convert_value_to_##type; \
+ } \
+ else { \
+ self->convert_g_value = convert_g_value_to_##type; \
+ self->convert_value = convert_value_to_##type; \
+ } \
+ self->byte_size = sizeof (g##type);
+
+
switch (base) {
case G_TYPE_INT:
- self->convert_g_value = convert_g_value_to_int;
- self->convert_value = convert_value_to_int;
- self->byte_size = sizeof (gint);
+ SET_CONVERT_FUNCTION (int);
break;
case G_TYPE_UINT:
- self->convert_g_value = convert_g_value_to_uint;
- self->convert_value = convert_value_to_uint;
- self->byte_size = sizeof (guint);
+ SET_CONVERT_FUNCTION (uint);
break;
case G_TYPE_LONG:
- self->convert_g_value = convert_g_value_to_long;
- self->convert_value = convert_value_to_long;
- self->byte_size = sizeof (glong);
+ SET_CONVERT_FUNCTION (long);
break;
case G_TYPE_ULONG:
- self->convert_g_value = convert_g_value_to_ulong;
- self->convert_value = convert_value_to_ulong;
- self->byte_size = sizeof (gulong);
+ SET_CONVERT_FUNCTION (ulong);
break;
case G_TYPE_INT64:
- self->convert_g_value = convert_g_value_to_int64;
- self->convert_value = convert_value_to_int64;
- self->byte_size = sizeof (gint64);
+ SET_CONVERT_FUNCTION (int64);
break;
case G_TYPE_UINT64:
- self->convert_g_value = convert_g_value_to_uint64;
- self->convert_value = convert_value_to_uint64;
- self->byte_size = sizeof (guint64);
+ SET_CONVERT_FUNCTION (uint64);
break;
case G_TYPE_FLOAT:
- self->convert_g_value = convert_g_value_to_float;
- self->convert_value = convert_value_to_float;
- self->byte_size = sizeof (gfloat);
+ SET_CONVERT_FUNCTION (float);
break;
case G_TYPE_DOUBLE:
- self->convert_g_value = convert_g_value_to_double;
- self->convert_value = convert_value_to_double;
- self->byte_size = sizeof (gdouble);
+ SET_CONVERT_FUNCTION (double);
break;
case G_TYPE_BOOLEAN:
self->convert_g_value = convert_g_value_to_boolean;
case PROP_CS:
self->cs = g_value_dup_object (value);
break;
+ case PROP_ABSOLUTE:
+ self->ABI.abi.want_absolute = g_value_get_boolean (value);
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
case PROP_CS:
g_value_set_object (value, self->cs);
break;
+ case PROP_ABSOLUTE:
+ g_value_set_boolean (value, self->ABI.abi.want_absolute);
+ break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
{
GstDirectControlBinding *self = GST_DIRECT_CONTROL_BINDING (object);
- g_value_unset (&self->cur_value);
+ if (G_IS_VALUE (&self->cur_value))
+ g_value_unset (&self->cur_value);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
* @cs: the control source
*
* Create a new control-binding that attaches the #GstControlSource to the
- * #GObject property.
+ * #GObject property. It will map the control source range [0.0 ... 1.0] to
+ * the full target property range, and clip all values outside this range.
*
* Returns: (transfer floating): the new #GstDirectControlBinding
*/
return (GstControlBinding *) g_object_new (GST_TYPE_DIRECT_CONTROL_BINDING,
"object", object, "name", property_name, "control-source", cs, NULL);
}
+
+/**
+ * gst_direct_control_binding_new_absolute:
+ * @object: the object of the property
+ * @property_name: the property-name to attach the control source
+ * @cs: the control source
+ *
+ * Create a new control-binding that attaches the #GstControlSource to the
+ * #GObject property. It will directly map the control source values to the
+ * target property range without any transformations.
+ *
+ * Returns: (transfer floating): the new #GstDirectControlBinding
+ *
+ * Since: 1.6
+ */
+GstControlBinding *
+gst_direct_control_binding_new_absolute (GstObject * object,
+ const gchar * property_name, GstControlSource * cs)
+{
+ return (GstControlBinding *) g_object_new (GST_TYPE_DIRECT_CONTROL_BINDING,
+ "object", object, "name", property_name, "control-source", cs, "absolute",
+ TRUE, NULL);
+}
projects / platform / upstream / gstreamer.git / blobdiff