2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
5 * Copyright (C) 2001 FUKUCHI Kentarou
7 * EffecTV is free software. We release this product under the terms of the
8 * GNU General Public License version 2. The license is included in the file
11 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
12 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
13 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
19 #include "gsteffectv.h"
21 #define GST_TYPE_QUARKTV \
22 (gst_quarktv_get_type())
23 #define GST_QUARKTV(obj) \
24 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUARKTV,GstQuarkTV))
25 #define GST_QUARKTV_CLASS(klass) \
26 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstQuarkTV))
27 #define GST_IS_QUARKTV(obj) \
28 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUARKTV))
29 #define GST_IS_QUARKTV_CLASS(obj) \
30 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUARKTV))
32 /* number of frames of time-buffer. It should be as a configurable paramter */
33 /* This number also must be 2^n just for the speed. */
36 typedef struct _GstQuarkTV GstQuarkTV;
37 typedef struct _GstQuarkTVClass GstQuarkTVClass;
43 GstPad *sinkpad, *srcpad;
49 GstBuffer **planetable;
52 struct _GstQuarkTVClass
54 GstElementClass parent_class;
57 GstElementDetails gst_quarktv_details = {
62 "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>",
63 "(C) 2001 FUKUCHI Kentarou",
67 /* Filter signals and args */
80 static void gst_quarktv_class_init (GstQuarkTVClass * klass);
81 static void gst_quarktv_init (GstQuarkTV * filter);
83 static GstElementStateReturn
84 gst_quarktv_change_state (GstElement *element);
86 static void gst_quarktv_set_property (GObject * object, guint prop_id,
87 const GValue * value, GParamSpec * pspec);
88 static void gst_quarktv_get_property (GObject * object, guint prop_id,
89 GValue * value, GParamSpec * pspec);
91 static void gst_quarktv_chain (GstPad * pad, GstBuffer * buf);
93 static GstElementClass *parent_class = NULL;
94 /* static guint gst_quarktv_signals[LAST_SIGNAL] = { 0 }; */
99 static unsigned int fastrand_val;
101 return (fastrand_val = fastrand_val * 1103515245 + 12345);
104 GType gst_quarktv_get_type (void)
106 static GType quarktv_type = 0;
109 static const GTypeInfo quarktv_info = {
110 sizeof (GstQuarkTVClass),
113 (GClassInitFunc) gst_quarktv_class_init,
118 (GInstanceInitFunc) gst_quarktv_init,
121 quarktv_type = g_type_register_static (GST_TYPE_ELEMENT, "GstQuarkTV", &quarktv_info, 0);
127 gst_quarktv_class_init (GstQuarkTVClass * klass)
129 GObjectClass *gobject_class;
130 GstElementClass *gstelement_class;
132 gobject_class = (GObjectClass *) klass;
133 gstelement_class = (GstElementClass *) klass;
135 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
137 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PLANES,
138 g_param_spec_int ("planes","Planes","Number of frames in the buffer",
139 1, 32, PLANES, G_PARAM_READWRITE));
141 gobject_class->set_property = gst_quarktv_set_property;
142 gobject_class->get_property = gst_quarktv_get_property;
144 gstelement_class->change_state = gst_quarktv_change_state;
147 static GstPadConnectReturn
148 gst_quarktv_sinkconnect (GstPad * pad, GstCaps * caps)
153 filter = GST_QUARKTV (gst_pad_get_parent (pad));
155 if (!GST_CAPS_IS_FIXED (caps))
156 return GST_PAD_CONNECT_DELAYED;
158 gst_caps_get_int (caps, "width", &filter->width);
159 gst_caps_get_int (caps, "height", &filter->height);
161 filter->area = filter->width * filter->height;
163 g_free (filter->planetable);
164 filter->planetable = (GstBuffer **) g_malloc(filter->planes * sizeof(GstBuffer *));
166 for(i = 0; i < filter->planes; i++) {
167 filter->planetable[i] = NULL;
170 if (gst_pad_try_set_caps (filter->srcpad, caps)) {
171 return GST_PAD_CONNECT_OK;
174 return GST_PAD_CONNECT_REFUSED;
178 gst_quarktv_init (GstQuarkTV * filter)
180 filter->sinkpad = gst_pad_new_from_template (gst_effectv_sink_factory (), "sink");
181 gst_pad_set_chain_function (filter->sinkpad, gst_quarktv_chain);
182 gst_pad_set_connect_function (filter->sinkpad, gst_quarktv_sinkconnect);
183 gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
185 filter->srcpad = gst_pad_new_from_template (gst_effectv_src_factory (), "src");
186 gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
188 filter->planes = PLANES;
189 filter->current_plane = filter->planes - 1;
190 filter->planetable = NULL;
194 gst_quarktv_chain (GstPad * pad, GstBuffer * buf)
201 filter = GST_QUARKTV (gst_pad_get_parent (pad));
203 src = (guint32 *) GST_BUFFER_DATA (buf);
207 outbuf = gst_buffer_new ();
208 GST_BUFFER_SIZE (outbuf) = area * sizeof(guint32);
209 dest = (guint32 *) GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
210 GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
212 if (filter->planetable[filter->current_plane])
213 gst_buffer_unref (filter->planetable[filter->current_plane]);
215 filter->planetable[filter->current_plane] = buf;
220 /* pick a random buffer */
221 rand = filter->planetable[(filter->current_plane + (fastrand () >> 24)) & (filter->planes - 1)];
223 dest[area] = (rand ? ((guint32 *)GST_BUFFER_DATA (rand))[area] : 0);
226 gst_pad_push (filter->srcpad, outbuf);
228 filter->current_plane--;
230 if (filter->current_plane < 0)
231 filter->current_plane = filter->planes - 1;
234 static GstElementStateReturn
235 gst_quarktv_change_state (GstElement *element)
237 GstQuarkTV *filter = GST_QUARKTV (element);
239 switch (GST_STATE_TRANSITION (element)) {
240 case GST_STATE_PAUSED_TO_READY:
244 for (i = 0; i < filter->planes; i++) {
245 if (filter->planetable[i])
246 gst_buffer_unref (filter->planetable[i]);
247 filter->planetable[i] = NULL;
249 g_free (filter->planetable);
250 filter->planetable = NULL;
257 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
262 gst_quarktv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
266 /* it's not null if we got it, but it might not be ours */
267 g_return_if_fail (GST_IS_QUARKTV (object));
269 filter = GST_QUARKTV (object);
273 filter->planes = g_value_get_int (value);
274 filter->current_plane = filter->planes - 1;
277 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
283 gst_quarktv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
287 /* it's not null if we got it, but it might not be ours */
288 g_return_if_fail (GST_IS_QUARKTV (object));
290 filter = GST_QUARKTV (object);
294 g_value_set_int (value, filter->planes);
297 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);