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.
30 #include "gsteffectv.h"
32 #define GST_TYPE_QUARKTV \
33 (gst_quarktv_get_type())
34 #define GST_QUARKTV(obj) \
35 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUARKTV,GstQuarkTV))
36 #define GST_QUARKTV_CLASS(klass) \
37 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QUARKTV,GstQuarkTVClass))
38 #define GST_IS_QUARKTV(obj) \
39 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUARKTV))
40 #define GST_IS_QUARKTV_CLASS(obj) \
41 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUARKTV))
43 /* number of frames of time-buffer. It should be as a configurable paramter */
44 /* This number also must be 2^n just for the speed. */
47 typedef struct _GstQuarkTV GstQuarkTV;
48 typedef struct _GstQuarkTVClass GstQuarkTVClass;
54 GstPad *sinkpad, *srcpad;
60 GstBuffer **planetable;
63 struct _GstQuarkTVClass
65 GstElementClass parent_class;
68 /* elementfactory information */
69 static GstElementDetails gst_quarktv_details = GST_ELEMENT_DETAILS ("QuarkTV",
70 "Filter/Effect/Video",
72 "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>");
74 /* Filter signals and args */
87 static void gst_quarktv_base_init (gpointer g_class);
88 static void gst_quarktv_class_init (GstQuarkTVClass * klass);
89 static void gst_quarktv_init (GstQuarkTV * filter);
91 static GstElementStateReturn gst_quarktv_change_state (GstElement * element);
93 static void gst_quarktv_set_property (GObject * object, guint prop_id,
94 const GValue * value, GParamSpec * pspec);
95 static void gst_quarktv_get_property (GObject * object, guint prop_id,
96 GValue * value, GParamSpec * pspec);
98 static void gst_quarktv_chain (GstPad * pad, GstData * _data);
100 static GstElementClass *parent_class = NULL;
102 /* static guint gst_quarktv_signals[LAST_SIGNAL] = { 0 }; */
104 static inline guint32
107 static unsigned int fastrand_val;
109 return (fastrand_val = fastrand_val * 1103515245 + 12345);
113 gst_quarktv_get_type (void)
115 static GType quarktv_type = 0;
118 static const GTypeInfo quarktv_info = {
119 sizeof (GstQuarkTVClass),
120 gst_quarktv_base_init,
122 (GClassInitFunc) gst_quarktv_class_init,
127 (GInstanceInitFunc) gst_quarktv_init,
131 g_type_register_static (GST_TYPE_ELEMENT, "GstQuarkTV", &quarktv_info,
138 gst_quarktv_base_init (gpointer g_class)
140 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
142 gst_element_class_add_pad_template (element_class,
143 gst_static_pad_template_get (&gst_effectv_src_template));
144 gst_element_class_add_pad_template (element_class,
145 gst_static_pad_template_get (&gst_effectv_sink_template));
147 gst_element_class_set_details (element_class, &gst_quarktv_details);
151 gst_quarktv_class_init (GstQuarkTVClass * klass)
153 GObjectClass *gobject_class;
154 GstElementClass *gstelement_class;
156 gobject_class = (GObjectClass *) klass;
157 gstelement_class = (GstElementClass *) klass;
159 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
161 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PLANES,
162 g_param_spec_int ("planes", "Planes", "Number of frames in the buffer",
163 1, 32, PLANES, G_PARAM_READWRITE));
165 gobject_class->set_property = gst_quarktv_set_property;
166 gobject_class->get_property = gst_quarktv_get_property;
168 gstelement_class->change_state = gst_quarktv_change_state;
171 static GstPadLinkReturn
172 gst_quarktv_link (GstPad * pad, const GstCaps * caps)
177 GstStructure *structure;
178 GstPadLinkReturn res;
180 filter = GST_QUARKTV (gst_pad_get_parent (pad));
181 g_return_val_if_fail (GST_IS_QUARKTV (filter), GST_PAD_LINK_REFUSED);
183 otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad);
185 res = gst_pad_try_set_caps (otherpad, caps);
186 if (GST_PAD_LINK_FAILED (res))
189 structure = gst_caps_get_structure (caps, 0);
190 if (!gst_structure_get_int (structure, "width", &filter->width) ||
191 !gst_structure_get_int (structure, "height", &filter->height))
192 return GST_PAD_LINK_REFUSED;
194 filter->area = filter->width * filter->height;
196 for (i = 0; i < filter->planes; i++) {
197 if (filter->planetable[i])
198 gst_buffer_unref (filter->planetable[i]);
199 filter->planetable[i] = NULL;
202 return GST_PAD_LINK_OK;
206 gst_quarktv_init (GstQuarkTV * filter)
209 gst_pad_new_from_template (gst_static_pad_template_get
210 (&gst_effectv_sink_template), "sink");
211 gst_pad_set_getcaps_function (filter->sinkpad, gst_pad_proxy_getcaps);
212 gst_pad_set_chain_function (filter->sinkpad, gst_quarktv_chain);
213 gst_pad_set_link_function (filter->sinkpad, gst_quarktv_link);
214 gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
217 gst_pad_new_from_template (gst_static_pad_template_get
218 (&gst_effectv_src_template), "src");
219 gst_pad_set_getcaps_function (filter->srcpad, gst_pad_proxy_getcaps);
220 gst_pad_set_link_function (filter->srcpad, gst_quarktv_link);
221 gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
223 filter->planes = PLANES;
224 filter->current_plane = filter->planes - 1;
226 (GstBuffer **) g_malloc (filter->planes * sizeof (GstBuffer *));
227 memset (filter->planetable, 0, filter->planes * sizeof (GstBuffer *));
231 gst_quarktv_chain (GstPad * pad, GstData * _data)
233 GstBuffer *buf = GST_BUFFER (_data);
239 filter = GST_QUARKTV (gst_pad_get_parent (pad));
241 src = (guint32 *) GST_BUFFER_DATA (buf);
245 outbuf = gst_buffer_new ();
246 GST_BUFFER_SIZE (outbuf) = area * sizeof (guint32);
247 dest = (guint32 *) GST_BUFFER_DATA (outbuf) =
248 g_malloc (GST_BUFFER_SIZE (outbuf));
249 GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
251 if (filter->planetable[filter->current_plane])
252 gst_buffer_unref (filter->planetable[filter->current_plane]);
254 filter->planetable[filter->current_plane] = buf;
259 /* pick a random buffer */
261 filter->planetable[(filter->current_plane +
262 (fastrand () >> 24)) & (filter->planes - 1)];
264 dest[area] = (rand ? ((guint32 *) GST_BUFFER_DATA (rand))[area] : 0);
267 gst_pad_push (filter->srcpad, GST_DATA (outbuf));
269 filter->current_plane--;
271 if (filter->current_plane < 0)
272 filter->current_plane = filter->planes - 1;
275 static GstElementStateReturn
276 gst_quarktv_change_state (GstElement * element)
278 GstQuarkTV *filter = GST_QUARKTV (element);
280 switch (GST_STATE_TRANSITION (element)) {
281 case GST_STATE_PAUSED_TO_READY:
285 for (i = 0; i < filter->planes; i++) {
286 if (filter->planetable[i])
287 gst_buffer_unref (filter->planetable[i]);
288 filter->planetable[i] = NULL;
290 g_free (filter->planetable);
291 filter->planetable = NULL;
298 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
303 gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value,
308 /* it's not null if we got it, but it might not be ours */
309 g_return_if_fail (GST_IS_QUARKTV (object));
311 filter = GST_QUARKTV (object);
316 gint new_n_planes = g_value_get_int (value);
317 GstBuffer **new_planetable;
320 /* If the number of planes changed, copy across any existing planes */
321 if (new_n_planes != filter->planes) {
323 (GstBuffer **) g_malloc (new_n_planes * sizeof (GstBuffer *));
325 for (i = 0; (i < new_n_planes) && (i < filter->planes); i++) {
326 new_planetable[i] = filter->planetable[i];
328 for (; i < filter->planes; i++) {
329 if (filter->planetable[i])
330 gst_buffer_unref (filter->planetable[i]);
332 g_free (filter->planetable);
333 filter->planetable = new_planetable;
334 filter->current_plane = filter->planes - 1;
335 filter->planes = new_n_planes;
340 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
346 gst_quarktv_get_property (GObject * object, guint prop_id, GValue * value,
351 /* it's not null if we got it, but it might not be ours */
352 g_return_if_fail (GST_IS_QUARKTV (object));
354 filter = GST_QUARKTV (object);
358 g_value_set_int (value, filter->planes);
361 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);