2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
5 * dice.c: a 'dicing' effect
6 * copyright (c) 2001 Sam Mertens. This code is subject to the provisions of
7 * the GNU Library Public License.
9 * I suppose this looks similar to PuzzleTV, but it's not. The screen is
10 * divided into small squares, each of which is rotated either 0, 90, 180 or
11 * 270 degrees. The amount of rotation for each square is chosen at random.
13 * This library is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Library General Public
15 * License as published by the Free Software Foundation; either
16 * version 2 of the License, or (at your option) any later version.
18 * This library is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Library General Public License for more details.
23 * You should have received a copy of the GNU Library General Public
24 * License along with this library; if not, write to the
25 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 * Boston, MA 02111-1307, USA.
30 * SECTION:element-dicetv
32 * DiceTV 'dices' the screen up into many small squares, each defaulting
33 * to a size of 16 pixels by 16 pixels.. Each square is rotated randomly
34 * in one of four directions: up (no change), down (180 degrees, or
35 * upside down), right (90 degrees clockwise), or left (90 degrees
36 * counterclockwise). The direction of each square normally remains
37 * consistent between each frame.
40 * <title>Example launch line</title>
42 * gst-launch -v videotestsrc ! dicetv ! ffmpegcolorspace ! autovideosink
43 * ]| This pipeline shows the effect of dicetv on a test stream.
54 #include "gsteffectv.h"
56 #include <gst/video/video.h>
57 #include <gst/controller/gstcontroller.h>
59 #define DEFAULT_CUBE_BITS 4
60 #define MAX_CUBE_BITS 5
61 #define MIN_CUBE_BITS 0
63 typedef enum _dice_dir
71 GST_BOILERPLATE (GstDiceTV, gst_dicetv, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
73 static void gst_dicetv_create_map (GstDiceTV * filter);
75 static GstStaticPadTemplate gst_dicetv_src_template =
76 GST_STATIC_PAD_TEMPLATE ("src",
79 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
80 GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR)
83 static GstStaticPadTemplate gst_dicetv_sink_template =
84 GST_STATIC_PAD_TEMPLATE ("sink",
87 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
88 GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR)
98 gst_dicetv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
101 GstDiceTV *filter = GST_DICETV (btrans);
102 GstStructure *structure;
103 gboolean ret = FALSE;
105 structure = gst_caps_get_structure (incaps, 0);
107 GST_OBJECT_LOCK (filter);
108 if (gst_structure_get_int (structure, "width", &filter->width) &&
109 gst_structure_get_int (structure, "height", &filter->height)) {
110 g_free (filter->dicemap);
111 filter->dicemap = (guint8 *) g_malloc (filter->height * filter->width);
112 gst_dicetv_create_map (filter);
115 GST_OBJECT_UNLOCK (filter);
121 gst_dicetv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
123 GstDiceTV *filter = GST_DICETV (trans);
125 gint i, map_x, map_y, map_i, base, dx, dy, di;
126 gint video_width, g_cube_bits, g_cube_size;
127 gint g_map_height, g_map_width;
128 GstFlowReturn ret = GST_FLOW_OK;
129 GstClockTime timestamp, stream_time;
130 const guint8 *dicemap;
132 src = (guint32 *) GST_BUFFER_DATA (in);
133 dest = (guint32 *) GST_BUFFER_DATA (out);
135 timestamp = GST_BUFFER_TIMESTAMP (in);
137 gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME, timestamp);
139 GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
140 GST_TIME_ARGS (timestamp));
142 if (GST_CLOCK_TIME_IS_VALID (stream_time))
143 gst_object_sync_values (G_OBJECT (filter), stream_time);
145 GST_OBJECT_LOCK (filter);
146 video_width = filter->width;
147 g_cube_bits = filter->g_cube_bits;
148 g_cube_size = filter->g_cube_size;
149 g_map_height = filter->g_map_height;
150 g_map_width = filter->g_map_width;
152 dicemap = filter->dicemap;
155 for (map_y = 0; map_y < g_map_height; map_y++) {
156 for (map_x = 0; map_x < g_map_width; map_x++) {
157 base = (map_y << g_cube_bits) * video_width + (map_x << g_cube_bits);
159 switch (dicemap[map_i]) {
161 for (dy = 0; dy < g_cube_size; dy++) {
162 i = base + dy * video_width;
163 for (dx = 0; dx < g_cube_size; dx++) {
170 for (dy = 0; dy < g_cube_size; dy++) {
171 i = base + dy * video_width;
173 for (dx = 0; dx < g_cube_size; dx++) {
174 di = base + (dx * video_width) + (g_cube_size - dy - 1);
181 for (dy = 0; dy < g_cube_size; dy++) {
182 di = base + dy * video_width;
183 i = base + (g_cube_size - dy - 1) * video_width + g_cube_size;
184 for (dx = 0; dx < g_cube_size; dx++) {
192 for (dy = 0; dy < g_cube_size; dy++) {
193 i = base + (dy * video_width);
194 for (dx = 0; dx < g_cube_size; dx++) {
195 di = base + dy + (g_cube_size - dx - 1) * video_width;
202 g_assert_not_reached ();
208 GST_OBJECT_UNLOCK (filter);
214 gst_dicetv_create_map (GstDiceTV * filter)
218 if (filter->height <= 0 || filter->width <= 0)
221 filter->g_map_height = filter->height >> filter->g_cube_bits;
222 filter->g_map_width = filter->width >> filter->g_cube_bits;
223 filter->g_cube_size = 1 << filter->g_cube_bits;
227 for (y = 0; y < filter->g_map_height; y++) {
228 for (x = 0; x < filter->g_map_width; x++) {
229 // dicemap[i] = ((i + y) & 0x3); /* Up, Down, Left or Right */
230 filter->dicemap[i] = (fastrand () >> 24) & 0x03;
237 gst_dicetv_set_property (GObject * object, guint prop_id, const GValue * value,
240 GstDiceTV *filter = GST_DICETV (object);
244 GST_OBJECT_LOCK (filter);
245 filter->g_cube_bits = g_value_get_int (value);
246 gst_dicetv_create_map (filter);
247 GST_OBJECT_UNLOCK (filter);
250 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
256 gst_dicetv_get_property (GObject * object, guint prop_id, GValue * value,
259 GstDiceTV *filter = GST_DICETV (object);
263 g_value_set_int (value, filter->g_cube_bits);
266 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
272 gst_dicetv_finalize (GObject * object)
274 GstDiceTV *filter = GST_DICETV (object);
276 g_free (filter->dicemap);
277 filter->dicemap = NULL;
279 G_OBJECT_CLASS (parent_class)->finalize (object);
283 gst_dicetv_base_init (gpointer g_class)
285 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
287 gst_element_class_set_details_simple (element_class, "DiceTV effect",
288 "Filter/Effect/Video",
289 "'Dices' the screen up into many small squares",
290 "Wim Taymans <wim.taymans@chello.be>");
292 gst_element_class_add_pad_template (element_class,
293 gst_static_pad_template_get (&gst_dicetv_sink_template));
294 gst_element_class_add_pad_template (element_class,
295 gst_static_pad_template_get (&gst_dicetv_src_template));
299 gst_dicetv_class_init (GstDiceTVClass * klass)
301 GObjectClass *gobject_class = (GObjectClass *) klass;
302 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
304 gobject_class->set_property = gst_dicetv_set_property;
305 gobject_class->get_property = gst_dicetv_get_property;
306 gobject_class->finalize = gst_dicetv_finalize;
308 g_object_class_install_property (gobject_class, PROP_CUBE_BITS,
309 g_param_spec_int ("square-bits", "Square Bits", "The size of the Squares",
310 MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS,
311 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
313 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_dicetv_set_caps);
314 trans_class->transform = GST_DEBUG_FUNCPTR (gst_dicetv_transform);
318 gst_dicetv_init (GstDiceTV * filter, GstDiceTVClass * klass)
320 filter->dicemap = NULL;
321 filter->g_cube_bits = DEFAULT_CUBE_BITS;
322 filter->g_cube_size = 0;
323 filter->g_map_height = 0;
324 filter->g_map_width = 0;