#endif
#include "gstgeometrictransform.h"
+#include "geometricmath.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (geometric_transform_debug);
static GstVideoFilterClass *parent_class = NULL;
+enum
+{
+ PROP_0,
+ PROP_OFF_EDGE_PIXELS
+};
+
+enum
+{
+ GST_GT_OFF_EDGES_PIXELS_IGNORE = 0,
+ GST_GT_OFF_EDGES_PIXELS_CLAMP,
+ GST_GT_OFF_EDGES_PIXELS_WRAP
+};
+
+#define GST_GT_OFF_EDGES_PIXELS_METHOD_TYPE ( \
+ gst_geometric_transform_off_edges_pixels_method_get_type())
+static GType
+gst_geometric_transform_off_edges_pixels_method_get_type (void)
+{
+ static GType method_type = 0;
+
+ static const GEnumValue method_types[] = {
+ {GST_GT_OFF_EDGES_PIXELS_IGNORE, "Ignore", "ignore"},
+ {GST_GT_OFF_EDGES_PIXELS_CLAMP, "Clamp", "clamp"},
+ {GST_GT_OFF_EDGES_PIXELS_WRAP, "Wrap", "wrap"},
+ {0, NULL, NULL}
+ };
+
+ if (!method_type) {
+ method_type =
+ g_enum_register_static ("GstGeometricTransformOffEdgesPixelsMethod",
+ method_types);
+ }
+ return method_type;
+}
+
+#define DEFAULT_OFF_EDGE_PIXELS GST_GT_OFF_EDGES_PIXELS_IGNORE
+
static gboolean
gst_geometric_transform_generate_map (GstGeometricTransform * gt)
{
gst_geometric_transform_do_map (GstGeometricTransform * gt, GstBuffer * inbuf,
GstBuffer * outbuf, gint x, gint y, gdouble in_x, gdouble in_y)
{
- gint trunc_x = (gint) in_x;
- gint trunc_y = (gint) in_y;
gint in_offset;
gint out_offset;
out_offset = y * gt->row_stride + x * gt->pixel_stride;
- in_offset = trunc_y * gt->row_stride + trunc_x * gt->pixel_stride;
- memcpy (GST_BUFFER_DATA (outbuf) + out_offset,
- GST_BUFFER_DATA (inbuf) + in_offset, gt->pixel_stride);
+ /* operate on out of edge pixels */
+ switch (gt->off_edge_pixels) {
+ case GST_GT_OFF_EDGES_PIXELS_CLAMP:
+ in_x = CLAMP (in_x, 0, gt->width - 1);
+ in_y = CLAMP (in_y, 0, gt->height - 1);
+ break;
+
+ case GST_GT_OFF_EDGES_PIXELS_WRAP:
+ in_x = mod_float (in_x, gt->width);
+ in_y = mod_float (in_y, gt->height);
+ if (in_x < 0)
+ in_x += gt->width;
+ if (in_y < 0)
+ in_y += gt->height;
+ break;
+
+ default:
+ break;
+ }
+
+ {
+ gint trunc_x = (gint) in_x;
+ gint trunc_y = (gint) in_y;
+ /* only set the values if the values are valid */
+ if (trunc_x >= 0 && trunc_x < gt->width && trunc_y >= 0 &&
+ trunc_y < gt->height) {
+ in_offset = trunc_y * gt->row_stride + trunc_x * gt->pixel_stride;
+
+ memcpy (GST_BUFFER_DATA (outbuf) + out_offset,
+ GST_BUFFER_DATA (inbuf) + in_offset, gt->pixel_stride);
+ }
+ }
}
static GstFlowReturn
return ret;
}
+static void
+gst_geometric_transform_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstGeometricTransform *gt;
+
+ gt = GST_GEOMETRIC_TRANSFORM (object);
+
+ switch (prop_id) {
+ case PROP_OFF_EDGE_PIXELS:
+ gt->off_edge_pixels = g_value_get_enum (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_geometric_transform_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstGeometricTransform *gt;
+
+ gt = GST_GEOMETRIC_TRANSFORM (object);
+
+ switch (prop_id) {
+ case PROP_OFF_EDGE_PIXELS:
+ g_value_set_enum (value, gt->off_edge_pixels);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
static gboolean
gst_geometric_transform_stop (GstBaseTransform * trans)
{
static void
gst_geometric_transform_class_init (gpointer klass, gpointer class_data)
{
+ GObjectClass *obj_class;
GstBaseTransformClass *trans_class;
+ obj_class = (GObjectClass *) klass;
trans_class = (GstBaseTransformClass *) klass;
parent_class = g_type_class_peek_parent (klass);
+ obj_class->set_property =
+ GST_DEBUG_FUNCPTR (gst_geometric_transform_set_property);
+ obj_class->get_property =
+ GST_DEBUG_FUNCPTR (gst_geometric_transform_get_property);
+
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);
+
+ g_object_class_install_property (obj_class, PROP_OFF_EDGE_PIXELS,
+ g_param_spec_enum ("off-edge-pixels", "Off edge pixels",
+ "What to do with off edge pixels",
+ GST_GT_OFF_EDGES_PIXELS_METHOD_TYPE, DEFAULT_OFF_EDGE_PIXELS,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT));
}
static void