2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
5 * Copyright (C) 2001 FUKUCHI Kentarou
7 * EffecTV is free software. This library is free software;
8 * you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
31 #include <gstvideofilter.h>
33 #define GST_TYPE_VERTIGOTV \
34 (gst_vertigotv_get_type())
35 #define GST_VERTIGOTV(obj) \
36 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VERTIGOTV,GstVertigoTV))
37 #define GST_VERTIGOTV_CLASS(klass) \
38 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VERTIGOTV,GstVertigoTVClass))
39 #define GST_IS_VERTIGOTV(obj) \
40 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VERTIGOTV))
41 #define GST_IS_VERTIGOTV_CLASS(obj) \
42 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VERTIGOTV))
44 typedef struct _GstVertigoTV GstVertigoTV;
45 typedef struct _GstVertigoTVClass GstVertigoTVClass;
49 GstVideofilter videofilter;
53 guint32 *current_buffer, *alt_buffer;
57 gdouble phase_increment;
61 struct _GstVertigoTVClass
63 GstVideofilterClass parent_class;
65 void (*reset) (GstElement * element);
68 /* Filter signals and args */
83 static void gst_vertigotv_base_init (gpointer g_class);
84 static void gst_vertigotv_class_init (GstVertigoTVClass * klass,
86 static void gst_vertigotv_init (GTypeInstance * instance, gpointer g_class);
87 static void gst_vertigotv_setup (GstVideofilter * videofilter);
89 static void gst_vertigotv_reset_handler (GstElement * element);
91 static void gst_vertigotv_set_property (GObject * object, guint prop_id,
92 const GValue * value, GParamSpec * pspec);
93 static void gst_vertigotv_get_property (GObject * object, guint prop_id,
94 GValue * value, GParamSpec * pspec);
95 static void gst_vertigotv_rgb32 (GstVideofilter * videofilter, void *d,
98 static guint gst_vertigotv_signals[LAST_SIGNAL] = { 0 };
101 gst_vertigotv_get_type (void)
103 static GType vertigotv_type = 0;
105 if (!vertigotv_type) {
106 static const GTypeInfo vertigotv_info = {
107 sizeof (GstVertigoTVClass),
108 gst_vertigotv_base_init,
110 (GClassInitFunc) gst_vertigotv_class_init,
113 sizeof (GstVertigoTV),
115 (GInstanceInitFunc) gst_vertigotv_init,
119 g_type_register_static (GST_TYPE_VIDEOFILTER, "GstVertigoTV",
122 return vertigotv_type;
125 static GstVideofilterFormat gst_vertigotv_formats[] = {
126 {"RGB ", 32, gst_vertigotv_rgb32, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000,
131 gst_vertigotv_base_init (gpointer g_class)
133 /* elementfactory information */
134 static GstElementDetails vertigotv_details = GST_ELEMENT_DETAILS ("VertigoTV",
135 "Filter/Effect/Video",
136 "A loopback alpha blending effector with rotating and scaling",
137 "Wim Taymans <wim.taymans@chello.be>");
138 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
139 GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
142 gst_element_class_set_details (element_class, &vertigotv_details);
144 for (i = 0; i < G_N_ELEMENTS (gst_vertigotv_formats); i++) {
145 gst_videofilter_class_add_format (videofilter_class,
146 gst_vertigotv_formats + i);
149 gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
153 gst_vertigotv_class_init (GstVertigoTVClass * klass, gpointer class_data)
155 GObjectClass *gobject_class;
156 GstElementClass *gstelement_class;
157 GstVideofilterClass *videofilter_class;
159 gobject_class = (GObjectClass *) klass;
160 gstelement_class = (GstElementClass *) klass;
161 videofilter_class = GST_VIDEOFILTER_CLASS (klass);
163 gst_vertigotv_signals[RESET_SIGNAL] =
164 g_signal_new ("reset-parms",
165 G_TYPE_FROM_CLASS (klass),
166 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
167 G_STRUCT_OFFSET (GstVertigoTVClass, reset),
168 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
170 klass->reset = gst_vertigotv_reset_handler;
172 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SPEED,
173 g_param_spec_float ("speed", "Speed", "Control the speed of movement",
174 0.01, 100.0, 0.02, G_PARAM_READWRITE));
175 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ZOOM_SPEED,
176 g_param_spec_float ("zoom_speed", "Zoom Speed",
177 "Control the rate of zooming", 1.01, 1.1, 1.01, G_PARAM_READWRITE));
179 gobject_class->set_property = gst_vertigotv_set_property;
180 gobject_class->get_property = gst_vertigotv_get_property;
182 videofilter_class->setup = gst_vertigotv_setup;
186 gst_vertigotv_reset_handler (GstElement * element)
188 GstVertigoTV *filter = GST_VERTIGOTV (element);
191 filter->phase_increment = 0.02;
192 filter->zoomrate = 1.01;
196 gst_vertigotv_setup (GstVideofilter * videofilter)
198 GstVertigoTV *filter;
200 int width = gst_videofilter_get_input_width (videofilter);
201 int height = gst_videofilter_get_input_height (videofilter);
203 g_return_if_fail (GST_IS_VERTIGOTV (videofilter));
204 filter = GST_VERTIGOTV (videofilter);
206 filter->width = width;
207 filter->height = height;
209 area = width * height;
211 g_free (filter->buffer);
212 filter->buffer = (guint32 *) g_malloc (area * 2 * sizeof (guint32));
214 memset (filter->buffer, 0, area * 2 * sizeof (guint32));
215 filter->current_buffer = filter->buffer;
216 filter->alt_buffer = filter->buffer + area;
221 gst_vertigotv_init (GTypeInstance * instance, gpointer g_class)
223 GstVertigoTV *filter = GST_VERTIGOTV (instance);
225 filter->buffer = NULL;
227 filter->phase_increment = 0.02;
228 filter->zoomrate = 1.01;
232 gst_vertigotv_set_parms (GstVertigoTV * filter)
239 dizz = sin (filter->phase) * 10 + sin (filter->phase * 1.9 + 5) * 5;
241 x = filter->width / 2;
242 y = filter->height / 2;
244 t = (x * x + y * y) * filter->zoomrate;
246 if (filter->width > filter->height) {
250 vx = (x * (x - dizz) + y * y) / t;
254 vx = (x * (x + dizz) + y * y) / t;
261 vx = (x * x + y * (y - dizz)) / t;
265 vx = (x * x + y * (y + dizz)) / t;
269 filter->dx = vx * 65536;
270 filter->dy = vy * 65536;
271 filter->sx = (-vx * x + vy * y + x + cos (filter->phase * 5) * 2) * 65536;
272 filter->sy = (-vx * y - vy * x + y + sin (filter->phase * 6) * 2) * 65536;
274 filter->phase += filter->phase_increment;
275 if (filter->phase > 5700000)
280 gst_vertigotv_rgb32 (GstVideofilter * videofilter, void *d, void *s)
282 GstVertigoTV *filter;
289 gint width, height, area;
291 filter = GST_VERTIGOTV (videofilter);
294 dest = (guint32 *) d;
296 width = filter->width;
297 height = filter->height;
298 area = width * height;
300 gst_vertigotv_set_parms (filter);
301 p = filter->alt_buffer;
303 for (y = height; y > 0; y--) {
307 for (x = width; x > 0; x--) {
308 i = (oy >> 16) * width + (ox >> 16);
314 v = filter->current_buffer[i] & 0xfcfcff;
315 v = (v * 3) + ((*src++) & 0xfcfcff);
321 filter->sx -= filter->dy;
322 filter->sy += filter->dx;
325 memcpy (dest, filter->alt_buffer, area * sizeof (guint32));
327 p = filter->current_buffer;
328 filter->current_buffer = filter->alt_buffer;
329 filter->alt_buffer = p;
333 gst_vertigotv_set_property (GObject * object, guint prop_id,
334 const GValue * value, GParamSpec * pspec)
336 GstVertigoTV *filter;
338 /* it's not null if we got it, but it might not be ours */
339 g_return_if_fail (GST_IS_VERTIGOTV (object));
341 filter = GST_VERTIGOTV (object);
345 filter->phase_increment = g_value_get_float (value);
348 filter->zoomrate = g_value_get_float (value);
356 gst_vertigotv_get_property (GObject * object, guint prop_id, GValue * value,
359 GstVertigoTV *filter;
361 /* it's not null if we got it, but it might not be ours */
362 g_return_if_fail (GST_IS_VERTIGOTV (object));
364 filter = GST_VERTIGOTV (object);
368 g_value_set_float (value, filter->phase_increment);
371 g_value_set_float (value, filter->zoomrate);
374 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);