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 (
71 "Filter/Effect/Video",
73 "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>"
76 /* Filter signals and args */
89 static void gst_quarktv_base_init (gpointer g_class);
90 static void gst_quarktv_class_init (GstQuarkTVClass * klass);
91 static void gst_quarktv_init (GstQuarkTV * filter);
93 static GstElementStateReturn
94 gst_quarktv_change_state (GstElement *element);
96 static void gst_quarktv_set_property (GObject * object, guint prop_id,
97 const GValue * value, GParamSpec * pspec);
98 static void gst_quarktv_get_property (GObject * object, guint prop_id,
99 GValue * value, GParamSpec * pspec);
101 static void gst_quarktv_chain (GstPad * pad, GstData *_data);
103 static GstElementClass *parent_class = NULL;
104 /* static guint gst_quarktv_signals[LAST_SIGNAL] = { 0 }; */
106 static inline guint32
109 static unsigned int fastrand_val;
111 return (fastrand_val = fastrand_val * 1103515245 + 12345);
114 GType gst_quarktv_get_type (void)
116 static GType quarktv_type = 0;
119 static const GTypeInfo quarktv_info = {
120 sizeof (GstQuarkTVClass),
121 gst_quarktv_base_init,
123 (GClassInitFunc) gst_quarktv_class_init,
128 (GInstanceInitFunc) gst_quarktv_init,
131 quarktv_type = g_type_register_static (GST_TYPE_ELEMENT, "GstQuarkTV", &quarktv_info, 0);
137 gst_quarktv_base_init (gpointer g_class)
139 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
141 gst_element_class_add_pad_template (element_class,
142 gst_static_pad_template_get (&gst_effectv_src_template));
143 gst_element_class_add_pad_template (element_class,
144 gst_static_pad_template_get (&gst_effectv_sink_template));
146 gst_element_class_set_details (element_class, &gst_quarktv_details);
150 gst_quarktv_class_init (GstQuarkTVClass * klass)
152 GObjectClass *gobject_class;
153 GstElementClass *gstelement_class;
155 gobject_class = (GObjectClass *) klass;
156 gstelement_class = (GstElementClass *) klass;
158 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
160 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PLANES,
161 g_param_spec_int ("planes","Planes","Number of frames in the buffer",
162 1, 32, PLANES, G_PARAM_READWRITE));
164 gobject_class->set_property = gst_quarktv_set_property;
165 gobject_class->get_property = gst_quarktv_get_property;
167 gstelement_class->change_state = gst_quarktv_change_state;
170 static GstPadLinkReturn
171 gst_quarktv_link (GstPad * pad, const GstCaps * caps)
176 GstStructure *structure;
177 GstPadLinkReturn res;
179 filter = GST_QUARKTV (gst_pad_get_parent (pad));
180 g_return_val_if_fail (GST_IS_QUARKTV (filter), GST_PAD_LINK_REFUSED);
182 otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad);
184 res = gst_pad_try_set_caps (otherpad, caps);
185 if (GST_PAD_LINK_FAILED (res))
188 structure = gst_caps_get_structure (caps, 0);
189 if (!gst_structure_get_int (structure, "width", &filter->width) ||
190 !gst_structure_get_int (structure, "height", &filter->height))
191 return GST_PAD_LINK_REFUSED;
193 filter->area = filter->width * filter->height;
195 for(i = 0; i < filter->planes; i++) {
196 if (filter->planetable[i])
197 gst_buffer_unref (filter->planetable[i]);
198 filter->planetable[i] = NULL;
201 return GST_PAD_LINK_OK;
205 gst_quarktv_init (GstQuarkTV * filter)
207 filter->sinkpad = gst_pad_new_from_template (
208 gst_static_pad_template_get(&gst_effectv_sink_template), "sink");
209 gst_pad_set_getcaps_function (filter->sinkpad, gst_pad_proxy_getcaps);
210 gst_pad_set_chain_function (filter->sinkpad, gst_quarktv_chain);
211 gst_pad_set_link_function (filter->sinkpad, gst_quarktv_link);
212 gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
214 filter->srcpad = gst_pad_new_from_template (
215 gst_static_pad_template_get(&gst_effectv_src_template), "src");
216 gst_pad_set_getcaps_function (filter->srcpad, gst_pad_proxy_getcaps);
217 gst_pad_set_link_function (filter->srcpad, gst_quarktv_link);
218 gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
220 filter->planes = PLANES;
221 filter->current_plane = filter->planes - 1;
222 filter->planetable = (GstBuffer **) g_malloc(filter->planes * sizeof(GstBuffer *));
223 memset (filter->planetable, 0, filter->planes * sizeof(GstBuffer *));
227 gst_quarktv_chain (GstPad * pad, GstData *_data)
229 GstBuffer *buf = GST_BUFFER (_data);
235 filter = GST_QUARKTV (gst_pad_get_parent (pad));
237 src = (guint32 *) GST_BUFFER_DATA (buf);
241 outbuf = gst_buffer_new ();
242 GST_BUFFER_SIZE (outbuf) = area * sizeof(guint32);
243 dest = (guint32 *) GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
244 GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
246 if (filter->planetable[filter->current_plane])
247 gst_buffer_unref (filter->planetable[filter->current_plane]);
249 filter->planetable[filter->current_plane] = buf;
254 /* pick a random buffer */
255 rand = filter->planetable[(filter->current_plane + (fastrand () >> 24)) & (filter->planes - 1)];
257 dest[area] = (rand ? ((guint32 *)GST_BUFFER_DATA (rand))[area] : 0);
260 gst_pad_push (filter->srcpad, GST_DATA (outbuf));
262 filter->current_plane--;
264 if (filter->current_plane < 0)
265 filter->current_plane = filter->planes - 1;
268 static GstElementStateReturn
269 gst_quarktv_change_state (GstElement *element)
271 GstQuarkTV *filter = GST_QUARKTV (element);
273 switch (GST_STATE_TRANSITION (element)) {
274 case GST_STATE_PAUSED_TO_READY:
278 for (i = 0; i < filter->planes; i++) {
279 if (filter->planetable[i])
280 gst_buffer_unref (filter->planetable[i]);
281 filter->planetable[i] = NULL;
283 g_free (filter->planetable);
284 filter->planetable = NULL;
291 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
296 gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
300 /* it's not null if we got it, but it might not be ours */
301 g_return_if_fail (GST_IS_QUARKTV (object));
303 filter = GST_QUARKTV (object);
308 gint new_n_planes = g_value_get_int (value);
309 GstBuffer **new_planetable;
312 /* If the number of planes changed, copy across any existing planes */
313 if (new_n_planes != filter->planes)
315 new_planetable = (GstBuffer **) g_malloc(new_n_planes * sizeof(GstBuffer *));
317 for(i = 0; (i < new_n_planes) && (i < filter->planes); i++) {
318 new_planetable[i] = filter->planetable[i];
320 for(; i < filter->planes; i++) {
321 if (filter->planetable[i])
322 gst_buffer_unref (filter->planetable[i]);
324 g_free (filter->planetable);
325 filter->planetable = new_planetable;
326 filter->current_plane = filter->planes - 1;
327 filter->planes = new_n_planes;
332 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
338 gst_quarktv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
342 /* it's not null if we got it, but it might not be ours */
343 g_return_if_fail (GST_IS_QUARKTV (object));
345 filter = GST_QUARKTV (object);
349 g_value_set_int (value, filter->planes);
352 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);