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
49 GstVideofilter videofilter;
60 struct _GstDiceTVClass
62 GstVideofilterClass parent_class;
64 void (*reset) (GstElement * element);
67 /* Filter signals and args */
81 static void gst_dicetv_base_init (gpointer g_class);
82 static void gst_dicetv_class_init (gpointer g_class, gpointer class_data);
83 static void gst_dicetv_init (GTypeInstance * instance, gpointer g_class);
85 static void gst_dicetv_reset_handler (GstElement * elem);
86 static void gst_dicetv_create_map (GstDiceTV * filter);
88 static void gst_dicetv_set_property (GObject * object, guint prop_id,
89 const GValue * value, GParamSpec * pspec);
90 static void gst_dicetv_get_property (GObject * object, guint prop_id,
91 GValue * value, GParamSpec * pspec);
92 static void gst_dicetv_setup (GstVideofilter * videofilter);
93 static void gst_dicetv_draw (GstVideofilter * videofilter, void *d, void *s);
95 static guint gst_dicetv_signals[LAST_SIGNAL] = { 0 };
98 gst_dicetv_get_type (void)
100 static GType dicetv_type = 0;
103 static const GTypeInfo dicetv_info = {
104 sizeof (GstDiceTVClass),
105 gst_dicetv_base_init,
107 (GClassInitFunc) gst_dicetv_class_init,
112 (GInstanceInitFunc) gst_dicetv_init,
116 g_type_register_static (GST_TYPE_VIDEOFILTER, "GstDiceTV", &dicetv_info,
122 static GstVideofilterFormat gst_dicetv_formats[] = {
123 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0x00ff0000, 0x0000ff00,
125 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0xff000000, 0x00ff0000,
127 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0x000000ff, 0x0000ff00,
129 {"RGB ", 32, gst_dicetv_draw, 24, G_BIG_ENDIAN, 0x0000ff00, 0x00ff0000,
134 gst_dicetv_base_init (gpointer g_class)
136 /* elementfactory information */
137 static GstElementDetails gst_dicetv_details = GST_ELEMENT_DETAILS ("DiceTV",
138 "Filter/Effect/Video",
139 "'Dices' the screen up into many small squares",
140 "Wim Taymans <wim.taymans@chello.be>");
142 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
143 GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
146 gst_element_class_set_details (element_class, &gst_dicetv_details);
148 for (i = 0; i < G_N_ELEMENTS (gst_dicetv_formats); i++) {
149 gst_videofilter_class_add_format (videofilter_class,
150 gst_dicetv_formats + i);
153 gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
157 gst_dicetv_class_init (gpointer g_class, gpointer class_data)
159 GObjectClass *gobject_class;
160 GstVideofilterClass *videofilter_class;
161 GstDiceTVClass *dicetv_class;
163 gobject_class = G_OBJECT_CLASS (g_class);
164 videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
165 dicetv_class = GST_DICETV_CLASS (g_class);
167 gst_dicetv_signals[RESET_SIGNAL] =
168 g_signal_new ("reset",
169 G_TYPE_FROM_CLASS (g_class),
171 G_STRUCT_OFFSET (GstDiceTVClass, reset),
172 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
174 dicetv_class->reset = gst_dicetv_reset_handler;
176 gobject_class->set_property = gst_dicetv_set_property;
177 gobject_class->get_property = gst_dicetv_get_property;
179 g_object_class_install_property (gobject_class, ARG_CUBE_BITS,
180 g_param_spec_int ("square_bits", "Square Bits", "The size of the Squares",
181 MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS, G_PARAM_READWRITE));
183 videofilter_class->setup = gst_dicetv_setup;
187 gst_dicetv_setup (GstVideofilter * videofilter)
191 g_return_if_fail (GST_IS_DICETV (videofilter));
192 dicetv = GST_DICETV (videofilter);
194 dicetv->width = gst_videofilter_get_input_width (videofilter);
195 dicetv->height = gst_videofilter_get_input_height (videofilter);
197 g_free (dicetv->dicemap);
199 (gchar *) g_malloc (dicetv->height * dicetv->width * sizeof (char));
200 gst_dicetv_create_map (dicetv);
204 gst_dicetv_init (GTypeInstance * instance, gpointer g_class)
206 GstDiceTV *filter = GST_DICETV (instance);
208 filter->dicemap = NULL;
209 filter->g_cube_bits = DEFAULT_CUBE_BITS;
210 filter->g_cube_size = 0;
211 filter->g_map_height = 0;
212 filter->g_map_width = 0;
216 gst_dicetv_reset_handler (GstElement * element)
218 GstDiceTV *filter = GST_DICETV (element);
220 gst_dicetv_create_map (filter);
226 static unsigned int fastrand_val;
228 return (fastrand_val = fastrand_val * 1103515245 + 12345);
232 gst_dicetv_draw (GstVideofilter * videofilter, void *d, void *s)
238 gint map_x, map_y, map_i;
245 filter = GST_DICETV (videofilter);
247 dest = (guint32 *) d;
249 video_width = filter->width;
250 g_cube_bits = filter->g_cube_bits;
251 g_cube_size = filter->g_cube_size;
254 for (map_y = 0; map_y < filter->g_map_height; map_y++) {
255 for (map_x = 0; map_x < filter->g_map_width; map_x++) {
256 base = (map_y << g_cube_bits) * video_width + (map_x << g_cube_bits);
258 switch (filter->dicemap[map_i]) {
260 for (dy = 0; dy < g_cube_size; dy++) {
261 i = base + dy * video_width;
262 for (dx = 0; dx < g_cube_size; dx++) {
269 for (dy = 0; dy < g_cube_size; dy++) {
270 i = base + dy * video_width;
272 for (dx = 0; dx < g_cube_size; dx++) {
273 di = base + (dx * video_width) + (g_cube_size - dy - 1);
280 for (dy = 0; dy < g_cube_size; dy++) {
281 di = base + dy * video_width;
282 i = base + (g_cube_size - dy - 1) * video_width + g_cube_size;
283 for (dx = 0; dx < g_cube_size; dx++) {
291 for (dy = 0; dy < g_cube_size; dy++) {
292 i = base + (dy * video_width);
293 for (dx = 0; dx < g_cube_size; dx++) {
294 di = base + dy + (g_cube_size - dx - 1) * video_width;
301 g_assert_not_reached ();
310 gst_dicetv_create_map (GstDiceTV * filter)
314 filter->g_map_height = filter->height >> filter->g_cube_bits;
315 filter->g_map_width = filter->width >> filter->g_cube_bits;
316 filter->g_cube_size = 1 << filter->g_cube_bits;
320 for (y = 0; y < filter->g_map_height; y++) {
321 for (x = 0; x < filter->g_map_width; x++) {
322 // dicemap[i] = ((i + y) & 0x3); /* Up, Down, Left or Right */
323 filter->dicemap[i] = (fastrand () >> 24) & 0x03;
330 gst_dicetv_set_property (GObject * object, guint prop_id, const GValue * value,
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 g_return_if_fail (GST_IS_DICETV (object));
356 filter = GST_DICETV (object);
360 g_value_set_int (value, filter->g_cube_bits);
363 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);