geometrictransform: Adds a intermediary baseclass circlegeometrictransform

Adds an intermediary baseclass named gstcirclegeometrictransform
to keep common properties code for filters that operate on
a circular area.

5 files changed, 337 insertions, 80 deletions

diff --git a/gst/geometrictransform/Makefile.am b/gst/geometrictransform/Makefile.am
index 849dea2d3..683097700 100644
--- a/gst/geometrictransform/Makefile.am
+++ b/gst/geometrictransform/Makefile.am
@@ -2,6 +2,7 @@ plugin_LTLIBRARIES = libgstgeometrictransform.la
 
 libgstgeometrictransform_la_SOURCES = plugin.c \
                                       gstgeometrictransform.c \
+                                      gstcirclegeometrictransform.c \
                                       gstpinch.c
 
 libgstgeometrictransform_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \
@@ -10,4 +11,6 @@ libgstgeometrictransform_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) -lgstvideo-@GST_MA
 libgstgeometrictransform_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 libgstgeometrictransform_la_LIBTOOLFLAGS = --tag=disable-static
 
-noinst_HEADERS = gstgeometrictransform.h gstpinch.h
+noinst_HEADERS = gstgeometrictransform.h \
+                 gstcirclegeometrictransform.h \
+                 gstpinch.h
diff --git a/gst/geometrictransform/gstcirclegeometrictransform.c b/gst/geometrictransform/gstcirclegeometrictransform.c
new file mode 100644
index 000000000..dfc10bc28
--- /dev/null
+++ b/gst/geometrictransform/gstcirclegeometrictransform.c
@@ -0,0 +1,225 @@
+/*
+ * 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 "gstcirclegeometrictransform.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_circle_geometric_transform_debug);
+#define GST_CAT_DEFAULT gst_circle_geometric_transform_debug
+
+GstGeometricTransformClass *parent_class;
+
+enum
+{
+  PROP_0,
+  PROP_X_CENTER,
+  PROP_Y_CENTER,
+  PROP_RADIUS
+};
+
+#define DEFAULT_X_CENTER 0.5
+#define DEFAULT_Y_CENTER 0.5
+#define DEFAULT_RADIUS 100
+
+static void
+gst_circle_geometric_transform_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstCircleGeometricTransform *circle_geometric_transform;
+
+  circle_geometric_transform = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (object);
+
+  switch (prop_id) {
+    case PROP_X_CENTER:
+      circle_geometric_transform->x_center = g_value_get_double (value);
+      break;
+    case PROP_Y_CENTER:
+      circle_geometric_transform->y_center = g_value_get_double (value);
+      break;
+    case PROP_RADIUS:
+      circle_geometric_transform->radius = g_value_get_double (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_circle_geometric_transform_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstCircleGeometricTransform *circle_geometric_transform;
+
+  circle_geometric_transform = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (object);
+
+  switch (prop_id) {
+    case PROP_X_CENTER:
+      g_value_set_double (value, circle_geometric_transform->x_center);
+      break;
+    case PROP_Y_CENTER:
+      g_value_set_double (value, circle_geometric_transform->y_center);
+      break;
+    case PROP_RADIUS:
+      g_value_set_double (value, circle_geometric_transform->radius);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+/* Clean up */
+static void
+gst_circle_geometric_transform_finalize (GObject * obj)
+{
+  G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+/* GObject vmethod implementations */
+
+static gboolean
+circle_geometric_transform_precalc (GstGeometricTransform * gt)
+{
+  GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt);
+
+  cgt->precalc_x_center = cgt->x_center * gt->width;
+  cgt->precalc_y_center = cgt->y_center * gt->height;
+  cgt->precalc_radius2 = cgt->radius * cgt->radius;
+
+  return TRUE;
+}
+
+static void
+gst_circle_geometric_transform_class_init (GstCircleGeometricTransformClass *
+    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_circle_geometric_transform_finalize);
+  gobject_class->set_property =
+      GST_DEBUG_FUNCPTR (gst_circle_geometric_transform_set_property);
+  gobject_class->get_property =
+      GST_DEBUG_FUNCPTR (gst_circle_geometric_transform_get_property);
+
+
+  /* FIXME I don't like the idea of x-center and y-center being in % and
+   * radius and intensity in absolute values, I think no one likes it, but
+   * I can't see a way to have nice default values without % */
+  g_object_class_install_property (gobject_class, PROP_X_CENTER,
+      g_param_spec_double ("x-center", "x center",
+          "X axis center of the circle_geometric_transform effect",
+          0.0, 1.0, DEFAULT_X_CENTER,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+  g_object_class_install_property (gobject_class, PROP_Y_CENTER,
+      g_param_spec_double ("y-center", "y center",
+          "Y axis center of the circle_geometric_transform effect",
+          0.0, 1.0, DEFAULT_Y_CENTER,
+          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+  g_object_class_install_property (gobject_class, PROP_RADIUS,
+      g_param_spec_double ("radius", "radius",
+          "radius of the circle_geometric_transform effect", 0.0, G_MAXDOUBLE,
+          DEFAULT_RADIUS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  gstgt_class->prepare_func = circle_geometric_transform_precalc;
+}
+
+static void
+gst_circle_geometric_transform_init (GstCircleGeometricTransform * filter,
+    GstCircleGeometricTransformClass * gclass)
+{
+  filter->x_center = DEFAULT_X_CENTER;
+  filter->y_center = DEFAULT_Y_CENTER;
+  filter->radius = DEFAULT_RADIUS;
+}
+
+GType
+gst_circle_geometric_transform_get_type (void)
+{
+  static GType circle_geometric_transform_type = 0;
+
+  if (!circle_geometric_transform_type) {
+    static const GTypeInfo circle_geometric_transform_info = {
+      sizeof (GstCircleGeometricTransformClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_circle_geometric_transform_class_init,
+      NULL,
+      NULL,
+      sizeof (GstCircleGeometricTransform),
+      0,
+      (GInstanceInitFunc) gst_circle_geometric_transform_init,
+    };
+
+    circle_geometric_transform_type =
+        g_type_register_static (GST_TYPE_GEOMETRIC_TRANSFORM,
+        "GstCircleGeometricTransform", &circle_geometric_transform_info,
+        G_TYPE_FLAG_ABSTRACT);
+
+    GST_DEBUG_CATEGORY_INIT (gst_circle_geometric_transform_debug,
+        "circlegeometrictransform", 0,
+        "Base class for geometric transform elements that operate "
+        "on a circular area");
+  }
+  return circle_geometric_transform_type;
+}
diff --git a/gst/geometrictransform/gstcirclegeometrictransform.h b/gst/geometrictransform/gstcirclegeometrictransform.h
new file mode 100644
index 000000000..fafdf931b
--- /dev/null
+++ b/gst/geometrictransform/gstcirclegeometrictransform.h
@@ -0,0 +1,93 @@
+/*
+ * 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_CIRCLE_GEOMETRIC_TRANSFORM_H__
+#define __GST_CIRCLE_GEOMETRIC_TRANSFORM_H__
+
+#include <gst/gst.h>
+#include "gstgeometrictransform.h"
+
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM \
+  (gst_circle_geometric_transform_get_type())
+#define GST_CIRCLE_GEOMETRIC_TRANSFORM(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM,GstCircleGeometricTransform))
+#define GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST(obj) \
+  ((GstCircleGeometricTransform *)(obj))
+#define GST_CIRCLE_GEOMETRIC_TRANSFORM_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM,GstCircleGeometricTransformClass))
+#define GST_IS_CIRCLE_GEOMETRIC_TRANSFORM(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM))
+#define GST_IS_CIRCLE_GEOMETRIC_TRANSFORM_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM))
+
+typedef struct _GstCircleGeometricTransform      GstCircleGeometricTransform;
+typedef struct _GstCircleGeometricTransformClass GstCircleGeometricTransformClass;
+
+struct _GstCircleGeometricTransform
+{
+  GstGeometricTransform element;
+
+  gdouble x_center;
+  gdouble y_center;
+  gdouble radius;
+
+  gdouble precalc_x_center;
+  gdouble precalc_y_center;
+  gdouble precalc_radius2;
+};
+
+struct _GstCircleGeometricTransformClass 
+{
+  GstGeometricTransformClass parent_class;
+};
+
+GType gst_circle_geometric_transform_get_type (void);
+
+gboolean gst_circle_geometric_transform_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_CIRCLE_GEOMETRIC_TRANSFORM_H__ */
diff --git a/gst/geometrictransform/gstpinch.c b/gst/geometrictransform/gstpinch.c
index 13be3b342..bb0dd4008 100644
--- a/gst/geometrictransform/gstpinch.c
+++ b/gst/geometrictransform/gstpinch.c
@@ -63,19 +63,13 @@ GST_DEBUG_CATEGORY_STATIC (gst_pinch_debug);
 enum
 {
   PROP_0,
-  PROP_X_CENTER,
-  PROP_Y_CENTER,
-  PROP_RADIUS,
   PROP_INTENSITY
 };
 
-#define DEFAULT_X_CENTER 0.5
-#define DEFAULT_Y_CENTER 0.5
-#define DEFAULT_RADIUS 100
 #define DEFAULT_INTENSITY 0.5
 
-GST_BOILERPLATE (GstPinch, gst_pinch, GstGeometricTransform,
-    GST_TYPE_GEOMETRIC_TRANSFORM);
+GST_BOILERPLATE (GstPinch, gst_pinch, GstCircleGeometricTransform,
+    GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM);
 
 static void
 gst_pinch_set_property (GObject * object, guint prop_id, const GValue * value,
@@ -86,15 +80,6 @@ gst_pinch_set_property (GObject * object, guint prop_id, const GValue * value,
   pinch = GST_PINCH_CAST (object);
 
   switch (prop_id) {
-    case PROP_X_CENTER:
-      pinch->x_center = g_value_get_double (value);
-      break;
-    case PROP_Y_CENTER:
-      pinch->y_center = g_value_get_double (value);
-      break;
-    case PROP_RADIUS:
-      pinch->radius = g_value_get_double (value);
-      break;
     case PROP_INTENSITY:
       pinch->intensity = g_value_get_double (value);
       break;
@@ -113,15 +98,6 @@ gst_pinch_get_property (GObject * object, guint prop_id,
   pinch = GST_PINCH_CAST (object);
 
   switch (prop_id) {
-    case PROP_X_CENTER:
-      g_value_set_double (value, pinch->x_center);
-      break;
-    case PROP_Y_CENTER:
-      g_value_set_double (value, pinch->y_center);
-      break;
-    case PROP_RADIUS:
-      g_value_set_double (value, pinch->radius);
-      break;
     case PROP_INTENSITY:
       g_value_set_double (value, pinch->intensity);
       break;
@@ -153,42 +129,29 @@ gst_pinch_base_init (gpointer gclass)
 }
 
 static gboolean
-pinch_precalc (GstGeometricTransform * gt)
-{
-  GstPinch *pinch = GST_PINCH_CAST (gt);
-
-  pinch->precalc_x_center = pinch->x_center * gt->width;
-  pinch->precalc_y_center = pinch->y_center * gt->height;
-
-  return TRUE;
-}
-
-static gboolean
 pinch_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
     gdouble * in_y)
 {
+  GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt);
   GstPinch *pinch = GST_PINCH_CAST (gt);
-  gdouble r2;
   gdouble distance;
   gdouble dx, dy;
 
-  dx = x - pinch->precalc_x_center;
-  dy = y - pinch->precalc_y_center;
+  dx = x - cgt->precalc_x_center;
+  dy = y - cgt->precalc_y_center;
   distance = dx * dx + dy * dy;
 
-  r2 = pinch->radius * pinch->radius;
-
   GST_LOG_OBJECT (pinch, "Center %0.5lf (%0.2lf) %0.5lf (%0.2lf)",
-      pinch->precalc_x_center, pinch->x_center, pinch->precalc_y_center,
-      pinch->y_center);
+      cgt->precalc_x_center, cgt->x_center, cgt->precalc_y_center,
+      cgt->y_center);
   GST_LOG_OBJECT (pinch, "Input %d %d, distance=%lf, radius2=%lf, dx=%lf"
-      ", dy=%lf", x, y, distance, r2, dx, dy);
+      ", dy=%lf", x, y, distance, cgt->precalc_radius2, dx, dy);
 
-  if (distance > r2 || distance == 0) {
+  if (distance > cgt->precalc_radius2 || distance == 0) {
     *in_x = x;
     *in_y = y;
   } else {
-    gdouble d = sqrt (distance / r2);
+    gdouble d = sqrt (distance / cgt->precalc_radius2);
     gdouble t = pow (sin (G_PI * 0.5 * d), -pinch->intensity);
 
     dx *= t;
@@ -196,8 +159,8 @@ pinch_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
 
     GST_LOG_OBJECT (pinch, "D=%lf, t=%lf, dx=%lf" ", dy=%lf", d, t, dx, dy);
 
-    *in_x = pinch->precalc_x_center + dx;
-    *in_y = pinch->precalc_y_center + dy;
+    *in_x = cgt->precalc_x_center + dx;
+    *in_y = cgt->precalc_y_center + dy;
 
     *in_x = CLAMP (*in_x, 0, gt->width - 1);
     *in_y = CLAMP (*in_y, 0, gt->height - 1);
@@ -225,23 +188,6 @@ gst_pinch_class_init (GstPinchClass * klass)
   gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_pinch_get_property);
 
 
-  /* FIXME I don't like the idea of x-center and y-center being in % and
-   * radius and intensity in absolute values, I think no one likes it, but
-   * I can't see a way to have nice default values without % */
-  g_object_class_install_property (gobject_class, PROP_X_CENTER,
-      g_param_spec_double ("x-center", "x center",
-          "X axis center of the pinch effect",
-          0.0, 1.0, DEFAULT_X_CENTER,
-          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-  g_object_class_install_property (gobject_class, PROP_Y_CENTER,
-      g_param_spec_double ("y-center", "y center",
-          "Y axis center of the pinch effect",
-          0.0, 1.0, DEFAULT_Y_CENTER,
-          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-  g_object_class_install_property (gobject_class, PROP_RADIUS,
-      g_param_spec_double ("radius", "radius", "radius of the pinch effect",
-          0.0, G_MAXDOUBLE, DEFAULT_RADIUS,
-          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (gobject_class, PROP_INTENSITY,
       g_param_spec_double ("intensity", "intensity",
           "intensity of the pinch effect",
@@ -249,16 +195,12 @@ gst_pinch_class_init (GstPinchClass * klass)
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 
   gstgt_class->map_func = pinch_map;
-  gstgt_class->prepare_func = pinch_precalc;
 }
 
 static void
 gst_pinch_init (GstPinch * filter, GstPinchClass * gclass)
 {
-  filter->x_center = DEFAULT_X_CENTER;
-  filter->y_center = DEFAULT_Y_CENTER;
   filter->intensity = DEFAULT_INTENSITY;
-  filter->radius = DEFAULT_RADIUS;
 }
 
 gboolean
diff --git a/gst/geometrictransform/gstpinch.h b/gst/geometrictransform/gstpinch.h
index e9a0ddeb1..ed632fcf2 100644
--- a/gst/geometrictransform/gstpinch.h
+++ b/gst/geometrictransform/gstpinch.h
@@ -45,7 +45,7 @@
 #define __GST_PINCH_H__
 
 #include <gst/gst.h>
-#include "gstgeometrictransform.h"
+#include "gstcirclegeometrictransform.h"
 
 G_BEGIN_DECLS
 
@@ -68,20 +68,14 @@ typedef struct _GstPinchClass GstPinchClass;
 
 struct _GstPinch
 {
-  GstGeometricTransform element;
+  GstCircleGeometricTransform element;
 
-  gdouble x_center;
-  gdouble y_center;
-  gdouble radius;
   gdouble intensity;
-
-  gdouble precalc_x_center;
-  gdouble precalc_y_center;
 };
 
 struct _GstPinchClass 
 {
-  GstGeometricTransformClass parent_class;
+  GstCircleGeometricTransformClass parent_class;
 };
 
 GType gst_pinch_get_type (void);