2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * dice.c: a 'dicing' effect
5 * copyright (c) 2001 Sam Mertens. This code is subject to the provisions of
6 * the GNU Library Public License.
8 * I suppose this looks similar to PuzzleTV, but it's not. The screen is
9 * divided into small squares, each of which is rotated either 0, 90, 180 or
10 * 270 degrees. The amount of rotation for each square is chosen at random.
18 #include <gstvideofilter.h>
20 #define GST_TYPE_DICETV \
21 (gst_dicetv_get_type())
22 #define GST_DICETV(obj) \
23 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DICETV,GstDiceTV))
24 #define GST_DICETV_CLASS(klass) \
25 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DICETV,GstDiceTVClass))
26 #define GST_IS_DICETV(obj) \
27 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DICETV))
28 #define GST_IS_DICETV_CLASS(obj) \
29 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DICETV))
31 typedef struct _GstDiceTV GstDiceTV;
32 typedef struct _GstDiceTVClass GstDiceTVClass;
34 #define DEFAULT_CUBE_BITS 4
35 #define MAX_CUBE_BITS 5
36 #define MIN_CUBE_BITS 0
38 typedef enum _dice_dir
48 GstVideofilter videofilter;
59 struct _GstDiceTVClass
61 GstVideofilterClass parent_class;
63 void (*reset) (GstElement * element);
66 /* Filter signals and args */
80 static void gst_dicetv_base_init (gpointer g_class);
81 static void gst_dicetv_class_init (gpointer g_class, gpointer class_data);
82 static void gst_dicetv_init (GTypeInstance * instance, gpointer g_class);
84 static void gst_dicetv_reset_handler (GstElement * elem);
85 static void gst_dicetv_create_map (GstDiceTV * filter);
87 static void gst_dicetv_set_property (GObject * object, guint prop_id,
88 const GValue * value, GParamSpec * pspec);
89 static void gst_dicetv_get_property (GObject * object, guint prop_id,
90 GValue * value, GParamSpec * pspec);
91 static void gst_dicetv_setup (GstVideofilter * videofilter);
92 static void gst_dicetv_draw (GstVideofilter * videofilter, void *d, void *s);
94 static guint gst_dicetv_signals[LAST_SIGNAL] = { 0 };
97 gst_dicetv_get_type (void)
99 static GType dicetv_type = 0;
102 static const GTypeInfo dicetv_info = {
103 sizeof (GstDiceTVClass),
104 gst_dicetv_base_init,
106 (GClassInitFunc) gst_dicetv_class_init,
111 (GInstanceInitFunc) gst_dicetv_init,
115 g_type_register_static (GST_TYPE_VIDEOFILTER, "GstDiceTV", &dicetv_info,
121 static GstVideofilterFormat gst_dicetv_formats[] = {
122 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0x00ff0000, 0x0000ff00,
124 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0xff000000, 0x00ff0000,
126 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0x000000ff, 0x0000ff00,
128 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000,
133 gst_dicetv_base_init (gpointer g_class)
135 /* elementfactory information */
136 static GstElementDetails gst_dicetv_details = GST_ELEMENT_DETAILS ("DiceTV",
137 "Filter/Effect/Video",
138 "'Dices' the screen up into many small squares",
139 "Wim Taymans <wim.taymans@chello.be>");
141 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
142 GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
145 gst_element_class_set_details (element_class, &gst_dicetv_details);
147 for (i = 0; i < G_N_ELEMENTS (gst_dicetv_formats); i++) {
148 gst_videofilter_class_add_format (videofilter_class,
149 gst_dicetv_formats + i);
152 gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
156 gst_dicetv_class_init (gpointer g_class, gpointer class_data)
158 GObjectClass *gobject_class;
159 GstVideofilterClass *videofilter_class;
160 GstDiceTVClass *dicetv_class;
162 gobject_class = G_OBJECT_CLASS (g_class);
163 videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
164 dicetv_class = GST_DICETV_CLASS (g_class);
166 gst_dicetv_signals[RESET_SIGNAL] =
167 g_signal_new ("reset",
168 G_TYPE_FROM_CLASS (g_class),
170 G_STRUCT_OFFSET (GstDiceTVClass, reset),
171 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
173 dicetv_class->reset = gst_dicetv_reset_handler;
175 g_object_class_install_property (gobject_class, ARG_CUBE_BITS,
176 g_param_spec_int ("square_bits", "Square Bits", "The size of the Squares",
177 MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS, G_PARAM_READWRITE));
179 gobject_class->set_property = gst_dicetv_set_property;
180 gobject_class->get_property = gst_dicetv_get_property;
182 videofilter_class->setup = gst_dicetv_setup;
186 gst_dicetv_setup (GstVideofilter * videofilter)
190 g_return_if_fail (GST_IS_DICETV (videofilter));
191 dicetv = GST_DICETV (videofilter);
193 dicetv->width = gst_videofilter_get_input_width (videofilter);
194 dicetv->height = gst_videofilter_get_input_height (videofilter);
196 g_free (dicetv->dicemap);
198 (gchar *) g_malloc (dicetv->height * dicetv->width * sizeof (char));
199 gst_dicetv_create_map (dicetv);
203 gst_dicetv_init (GTypeInstance * instance, gpointer g_class)
205 GstDiceTV *filter = GST_DICETV (instance);
207 filter->dicemap = NULL;
208 filter->g_cube_bits = DEFAULT_CUBE_BITS;
209 filter->g_cube_size = 0;
210 filter->g_map_height = 0;
211 filter->g_map_width = 0;
215 gst_dicetv_reset_handler (GstElement * element)
217 GstDiceTV *filter = GST_DICETV (element);
219 gst_dicetv_create_map (filter);
225 static unsigned int fastrand_val;
227 return (fastrand_val = fastrand_val * 1103515245 + 12345);
231 gst_dicetv_draw (GstVideofilter * videofilter, void *d, void *s)
237 gint map_x, map_y, map_i;
240 gint video_width = filter->width;
241 gint g_cube_bits = filter->g_cube_bits;
242 gint g_cube_size = filter->g_cube_size;
244 filter = GST_DICETV (videofilter);
246 dest = (guint32 *) d;
248 video_width = filter->width;
249 g_cube_bits = filter->g_cube_bits;
250 g_cube_size = filter->g_cube_size;
253 for (map_y = 0; map_y < filter->g_map_height; map_y++) {
254 for (map_x = 0; map_x < filter->g_map_width; map_x++) {
255 base = (map_y << g_cube_bits) * video_width + (map_x << g_cube_bits);
257 switch (filter->dicemap[map_i]) {
259 for (dy = 0; dy < g_cube_size; dy++) {
260 i = base + dy * video_width;
261 for (dx = 0; dx < g_cube_size; dx++) {
268 for (dy = 0; dy < g_cube_size; dy++) {
269 i = base + dy * video_width;
271 for (dx = 0; dx < g_cube_size; dx++) {
272 di = base + (dx * video_width) + (g_cube_size - dy - 1);
279 for (dy = 0; dy < g_cube_size; dy++) {
280 di = base + dy * video_width;
281 i = base + (g_cube_size - dy - 1) * video_width + g_cube_size;
282 for (dx = 0; dx < g_cube_size; dx++) {
290 for (dy = 0; dy < g_cube_size; dy++) {
291 i = base + (dy * video_width);
292 for (dx = 0; dx < g_cube_size; dx++) {
293 di = base + dy + (g_cube_size - dx - 1) * video_width;
300 g_assert_not_reached ();
309 gst_dicetv_create_map (GstDiceTV * filter)
313 filter->g_map_height = filter->height >> filter->g_cube_bits;
314 filter->g_map_width = filter->width >> filter->g_cube_bits;
315 filter->g_cube_size = 1 << filter->g_cube_bits;
319 for (y = 0; y < filter->g_map_height; y++) {
320 for (x = 0; x < filter->g_map_width; x++) {
321 // dicemap[i] = ((i + y) & 0x3); /* Up, Down, Left or Right */
322 filter->dicemap[i] = (fastrand () >> 24) & 0x03;
329 gst_dicetv_set_property (GObject * object, guint prop_id, const GValue * value,
334 /* it's not null if we got it, but it might not be ours */
335 g_return_if_fail (GST_IS_DICETV (object));
337 filter = GST_DICETV (object);
341 filter->g_cube_bits = g_value_get_int (value);
342 gst_dicetv_create_map (filter);
349 gst_dicetv_get_property (GObject * object, guint prop_id, GValue * value,
354 /* it's not null if we got it, but it might not be ours */
355 g_return_if_fail (GST_IS_DICETV (object));
357 filter = GST_DICETV (object);
361 g_value_set_int (value, filter->g_cube_bits);
364 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);