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geometrictransform: Adds prepare function and cleanup

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Adds a prepare function to make subclasses precalculate values
that will be used throughout the mapping functions.

Also adds a missing cleanup to fix a memleak
This commit is contained in:
Thiago Santos 2010-05-30 12:36:08 -03:00
parent 6560248be9
commit 8c5360a559
2 changed files with 25 additions and 1 deletions
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16
gst/geometrictransform/gstgeometrictransform.c
View file

@ -61,6 +61,10 @@ gst_geometric_transform_generate_map (GstGeometricTransform * gt)
/* subclass must have defined the map_func */
g_return_val_if_fail (klass->map_func, FALSE);
if (klass->prepare_func)
if (!klass->prepare_func (gt))
return FALSE;
/*
* (x,y) pairs of the inverse mapping
*/
@ -143,7 +147,6 @@ gst_geometric_transform_transform (GstBaseTransform * trans, GstBuffer * buf,
gt = GST_GEOMETRIC_TRANSFORM (trans);
/* subclass must have defined the map_func */
g_return_val_if_fail (gt->map, GST_FLOW_ERROR);
ptr = gt->map;
@ -157,6 +160,16 @@ gst_geometric_transform_transform (GstBaseTransform * trans, GstBuffer * buf,
return ret;
}
static gboolean
gst_geometric_transform_stop (GstBaseTransform * trans)
{
GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (trans);
g_free (gt->map);
return TRUE;
}
static void
gst_geometric_transform_base_init (gpointer g_class)
{
@ -177,6 +190,7 @@ gst_geometric_transform_class_init (gpointer klass, gpointer class_data)
parent_class = g_type_class_peek_parent (klass);
trans_class->stop = GST_DEBUG_FUNCPTR (gst_geometric_transform_stop);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_geometric_transform_set_caps);
trans_class->transform =
GST_DEBUG_FUNCPTR (gst_geometric_transform_transform);

10
gst/geometrictransform/gstgeometrictransform.h
View file

@ -58,6 +58,15 @@ typedef struct _GstGeometricTransformClass GstGeometricTransformClass;
typedef gboolean (*GstGeometricTransformMapFunc) (GstGeometricTransform * gt,
gint x, gint y, gdouble * _input_x, gdouble *_input_y);
/**
* GstGeometricTransformPrepareFunc:
*
* Called right before starting to calculate the mapping so that
* instances might precalculate some values.
*/
typedef gboolean (*GstGeometricTransformPrepareFunc) (
GstGeometricTransform * gt);
/**
* GstGeometricTransform:
*
@ -78,6 +87,7 @@ struct _GstGeometricTransformClass {
GstVideoFilterClass parent_class;
GstGeometricTransformMapFunc map_func;
GstGeometricTransformPrepareFunc prepare_func;
};
GType gst_geometric_transform_get_type (void);