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geometrictransform: Make map precalculation optional

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Adds a variable to be set to allow subclasses to enable
or disable precalculation of the pixels mapping
This commit is contained in:
Thiago Santos 2010-06-05 19:20:06 -03:00
parent 370a5049ba
commit e7d417f4fc
2 changed files with 38 additions and 13 deletions
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45
gst/geometrictransform/gstgeometrictransform.c
View file

@ -92,10 +92,6 @@ 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
*/
@ -130,8 +126,10 @@ gst_geometric_transform_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
gboolean ret;
gint old_width;
gint old_height;
GstGeometricTransformClass *klass;
gt = GST_GEOMETRIC_TRANSFORM (btrans);
klass = GST_GEOMETRIC_TRANSFORM_GET_CLASS (gt);
old_width = gt->width;
old_height = gt->height;
@ -145,7 +143,11 @@ gst_geometric_transform_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
/* regenerate the map */
if (old_width == 0 || old_height == 0 || gt->width != old_width ||
gt->height != old_height) {
gst_geometric_transform_generate_map (gt);
if (klass->prepare_func)
if (!klass->prepare_func (gt))
return FALSE;
if (gt->precalc_map)
gst_geometric_transform_generate_map (gt);
}
}
return ret;
@ -199,22 +201,38 @@ gst_geometric_transform_transform (GstBaseTransform * trans, GstBuffer * buf,
GstBuffer * outbuf)
{
GstGeometricTransform *gt;
GstGeometricTransformClass *klass;
gint x, y;
GstFlowReturn ret = GST_FLOW_OK;
gdouble *ptr;
gt = GST_GEOMETRIC_TRANSFORM (trans);
g_return_val_if_fail (gt->map, GST_FLOW_ERROR);
klass = GST_GEOMETRIC_TRANSFORM_GET_CLASS (gt);
memset (GST_BUFFER_DATA (outbuf), 0, GST_BUFFER_SIZE (outbuf));
ptr = gt->map;
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
/* do the mapping */
gst_geometric_transform_do_map (gt, buf, outbuf, x, y, ptr[0], ptr[1]);
ptr += 2;
if (gt->precalc_map) {
g_return_val_if_fail (gt->map, GST_FLOW_ERROR);
ptr = gt->map;
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
/* do the mapping */
gst_geometric_transform_do_map (gt, buf, outbuf, x, y, ptr[0], ptr[1]);
ptr += 2;
}
}
} else {
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
gdouble in_x, in_y;
if (klass->map_func (gt, x, y, &in_x, &in_y)) {
gst_geometric_transform_do_map (gt, buf, outbuf, x, y, in_x, in_y);
} else {
GST_WARNING_OBJECT (gt, "Failed to do mapping for %d %d", x, y);
return GST_FLOW_ERROR;
}
}
}
}
return ret;
@ -312,6 +330,7 @@ gst_geometric_transform_init (GTypeInstance * instance, gpointer g_class)
GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (instance);
gt->off_edge_pixels = DEFAULT_OFF_EDGE_PIXELS;
gt->precalc_map = TRUE;
}
GType

6
gst/geometrictransform/gstgeometrictransform.h
View file

@ -87,6 +87,12 @@ struct _GstGeometricTransform {
gint pixel_stride;
gint row_stride;
/* Must be set on NULL state.
* Useful for subclasses that use don't want to use a fixed precalculated
* pixel mapping table. Like 'diffuse' that uses random values for each pic.
*/
gboolean precalc_map;
/* properties */
gint off_edge_pixels;