summaryrefslogtreecommitdiff
path: root/gst/geometrictransform
diff options
context:
space:
mode:
Diffstat (limited to 'gst/geometrictransform')
-rw-r--r--gst/geometrictransform/Makefile.am2
-rw-r--r--gst/geometrictransform/gstrotate.c226
-rw-r--r--gst/geometrictransform/gstrotate.h87
-rw-r--r--gst/geometrictransform/plugin.c4
4 files changed, 319 insertions, 0 deletions
diff --git a/gst/geometrictransform/Makefile.am b/gst/geometrictransform/Makefile.am
index 0dbf0b128..307afef04 100644
--- a/gst/geometrictransform/Makefile.am
+++ b/gst/geometrictransform/Makefile.am
@@ -9,6 +9,7 @@ libgstgeometrictransform_la_SOURCES = plugin.c \
gstkaleidoscope.c \
gstmarble.c \
gstpinch.c \
+ gstrotate.c \
gstsphere.c \
gsttwirl.c \
gstwaterripple.c \
@@ -39,6 +40,7 @@ noinst_HEADERS = gstgeometrictransform.h \
gstkaleidoscope.h \
gstmarble.h \
gstpinch.h \
+ gstrotate.h \
gstsphere.h \
gsttwirl.h \
gstwaterripple.h \
diff --git a/gst/geometrictransform/gstrotate.c b/gst/geometrictransform/gstrotate.c
new file mode 100644
index 000000000..a7433cce0
--- /dev/null
+++ b/gst/geometrictransform/gstrotate.c
@@ -0,0 +1,226 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Thanks to Jerry Huxtable <http://www.jhlabs.com> work on its java
+ * image editor and filters. The algorithms here were extracted from
+ * his code.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gst/gst.h>
+#include <math.h>
+
+#include "geometricmath.h"
+#include "gstrotate.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_rotate_debug);
+#define GST_CAT_DEFAULT gst_rotate_debug
+
+enum
+{
+ PROP_0,
+ PROP_ANGLE
+};
+
+#define DEFAULT_ANGLE 0
+
+GST_BOILERPLATE (GstRotate, gst_rotate, GstGeometricTransform,
+ GST_TYPE_GEOMETRIC_TRANSFORM);
+
+static void
+gst_rotate_set_property (GObject * object, guint prop_id, const GValue * value,
+ GParamSpec * pspec)
+{
+ GstRotate *rotate;
+ GstGeometricTransform *gt;
+ gdouble v;
+
+ gt = GST_GEOMETRIC_TRANSFORM_CAST (object);
+ rotate = GST_ROTATE_CAST (object);
+
+ GST_OBJECT_LOCK (rotate);
+ switch (prop_id) {
+ case PROP_ANGLE:
+ v = g_value_get_double (value);
+ if (v != rotate->angle) {
+ rotate->angle = v;
+ gst_geometric_transform_set_need_remap (gt);
+ }
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (rotate);
+}
+
+static void
+gst_rotate_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstRotate *rotate;
+
+ rotate = GST_ROTATE_CAST (object);
+
+ switch (prop_id) {
+ case PROP_ANGLE:
+ g_value_set_double (value, rotate->angle);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* Clean up */
+static void
+gst_rotate_finalize (GObject * obj)
+{
+ G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+/* GObject vmethod implementations */
+
+static void
+gst_rotate_base_init (gpointer gclass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ gst_element_class_set_details_simple (element_class,
+ "rotate",
+ "Transform/Effect/Video",
+ "Warps the picture into an arc shaped form",
+ "Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
+}
+
+static gboolean
+rotate_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
+ gdouble * in_y)
+{
+ GstRotate *rotate = GST_ROTATE_CAST (gt);
+ gint w, h;
+ gdouble cix, ciy, cox, coy; /* centers, in/out x/y */
+ gdouble ai, ao, ar; /* angles, in/out/rotate (radians) */
+ gdouble r; /* radius */
+ gdouble xi, yi, xo, yo; /* positions in/out x/y */
+
+ /* input and output image height and width */
+ w = gt->width;
+ h = gt->height;
+
+ /* our parameters */
+ ar = rotate->angle * M_PI / 180.0; /* angle of rotation, degrees to radians */
+
+ /* get in and out centers */
+ cox = 0.5 * w;
+ coy = 0.5 * h;
+ cix = cox;
+ ciy = coy;
+
+ /* convert output image position to polar form */
+ xo = x - cox;
+ yo = y - coy;
+ ao = atan2 (yo, xo);
+ r = sqrt (xo * xo + yo * yo);
+
+ /* perform rotation backward to get input image rotation
+ * this seems wrong, but rotation from in-->out is counterclockwise */
+ ai = ao + ar;
+
+ /* back to rectangular for input image position */
+ xi = r * cos (ai);
+ yi = r * sin (ai);
+
+ /* restore center offset, return values to caller */
+ *in_x = xi + cix;
+ *in_y = yi + ciy;
+
+ GST_DEBUG_OBJECT (rotate, "Inversely mapped %d %d into %lf %lf",
+ x, y, *in_x, *in_y);
+
+ return TRUE;
+}
+
+static void
+gst_rotate_class_init (GstRotateClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstGeometricTransformClass *gstgt_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstgt_class = (GstGeometricTransformClass *) klass;
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_rotate_finalize);
+ gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_rotate_set_property);
+ gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_rotate_get_property);
+
+ g_object_class_install_property (gobject_class, PROP_ANGLE,
+ g_param_spec_double ("angle", "angle",
+ "Angle at which the arc starts in radians",
+ -G_MAXDOUBLE, G_MAXDOUBLE, DEFAULT_ANGLE,
+ GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ gstgt_class->map_func = rotate_map;
+}
+
+static void
+gst_rotate_init (GstRotate * filter, GstRotateClass * gclass)
+{
+ filter->angle = DEFAULT_ANGLE;
+}
+
+gboolean
+gst_rotate_plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_rotate_debug, "rotate", 0, "rotate");
+
+ return gst_element_register (plugin, "rotate", GST_RANK_NONE,
+ GST_TYPE_ROTATE);
+}
diff --git a/gst/geometrictransform/gstrotate.h b/gst/geometrictransform/gstrotate.h
new file mode 100644
index 000000000..9898cac89
--- /dev/null
+++ b/gst/geometrictransform/gstrotate.h
@@ -0,0 +1,87 @@
+/*
+ * GStreamer
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_ROTATE_H__
+#define __GST_ROTATE_H__
+
+#include <gst/gst.h>
+#include "gstgeometrictransform.h"
+
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_ROTATE \
+ (gst_rotate_get_type())
+#define GST_ROTATE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ROTATE,GstRotate))
+#define GST_ROTATE_CAST(obj) \
+ ((GstRotate *)(obj))
+#define GST_ROTATE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ROTATE,GstRotateClass))
+#define GST_IS_ROTATE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ROTATE))
+#define GST_IS_ROTATE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ROTATE))
+
+typedef struct _GstRotate GstRotate;
+typedef struct _GstRotateClass GstRotateClass;
+
+struct _GstRotate
+{
+ GstGeometricTransform element;
+
+ gdouble angle;
+};
+
+struct _GstRotateClass
+{
+ GstGeometricTransformClass parent_class;
+};
+
+GType gst_rotate_get_type (void);
+
+gboolean gst_rotate_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_ROTATE_H__ */
diff --git a/gst/geometrictransform/plugin.c b/gst/geometrictransform/plugin.c
index bacad18f3..0173a718c 100644
--- a/gst/geometrictransform/plugin.c
+++ b/gst/geometrictransform/plugin.c
@@ -26,6 +26,7 @@
#include "gstkaleidoscope.h"
#include "gstmarble.h"
#include "gstpinch.h"
+#include "gstrotate.h"
#include "gstsphere.h"
#include "gsttwirl.h"
#include "gstwaterripple.h"
@@ -54,6 +55,9 @@ plugin_init (GstPlugin * plugin)
if (!gst_pinch_plugin_init (plugin))
return FALSE;
+ if (!gst_rotate_plugin_init (plugin))
+ return FALSE;
+
if (!gst_sphere_plugin_init (plugin))
return FALSE;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 16:05:11 +0000