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 ! videoconvert ! autovideosink
43 * ]| This pipeline shows the effect of dicetv on a test stream.
54 #include "gsteffectv.h"
56 #define DEFAULT_CUBE_BITS 4
57 #define MAX_CUBE_BITS 5
58 #define MIN_CUBE_BITS 0
60 typedef enum _dice_dir
68 #define gst_dicetv_parent_class parent_class
69 G_DEFINE_TYPE (GstDiceTV, gst_dicetv, GST_TYPE_VIDEO_FILTER);
71 static void gst_dicetv_create_map (GstDiceTV * filter);
73 static GstStaticPadTemplate gst_dicetv_src_template =
74 GST_STATIC_PAD_TEMPLATE ("src",
77 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
80 static GstStaticPadTemplate gst_dicetv_sink_template =
81 GST_STATIC_PAD_TEMPLATE ("sink",
84 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
94 gst_dicetv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
97 GstDiceTV *filter = GST_DICETV (btrans);
100 if (!gst_video_info_from_caps (&info, incaps))
103 g_free (filter->dicemap);
105 (guint8 *) g_malloc (GST_VIDEO_INFO_WIDTH (&info) *
106 GST_VIDEO_INFO_WIDTH (&info));
107 gst_dicetv_create_map (filter);
116 GST_DEBUG_OBJECT (filter, "invalid caps");
122 gst_dicetv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
124 GstDiceTV *filter = GST_DICETV (trans);
125 GstVideoFrame in_frame, out_frame;
127 gint i, map_x, map_y, map_i, base, dx, dy, di;
128 gint video_stride, g_cube_bits, g_cube_size;
129 gint g_map_height, g_map_width;
130 GstClockTime timestamp, stream_time;
131 const guint8 *dicemap;
133 timestamp = GST_BUFFER_TIMESTAMP (in);
135 gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME, timestamp);
137 GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
138 GST_TIME_ARGS (timestamp));
140 if (GST_CLOCK_TIME_IS_VALID (stream_time))
141 gst_object_sync_values (GST_OBJECT (filter), stream_time);
143 gst_video_frame_map (&in_frame, &filter->info, in, GST_MAP_READ);
144 gst_video_frame_map (&out_frame, &filter->info, out, GST_MAP_WRITE);
146 src = (guint32 *) GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
147 dest = (guint32 *) GST_VIDEO_FRAME_PLANE_DATA (&out_frame, 0);
148 video_stride = GST_VIDEO_FRAME_PLANE_STRIDE (&in_frame, 0);
150 GST_OBJECT_LOCK (filter);
151 g_cube_bits = filter->g_cube_bits;
152 g_cube_size = filter->g_cube_size;
153 g_map_height = filter->g_map_height;
154 g_map_width = filter->g_map_width;
156 dicemap = filter->dicemap;
159 for (map_y = 0; map_y < g_map_height; map_y++) {
160 for (map_x = 0; map_x < g_map_width; map_x++) {
161 base = (map_y << g_cube_bits) * video_stride + (map_x << g_cube_bits);
163 switch (dicemap[map_i]) {
165 for (dy = 0; dy < g_cube_size; dy++) {
166 i = base + dy * video_stride;
167 for (dx = 0; dx < g_cube_size; dx++) {
174 for (dy = 0; dy < g_cube_size; dy++) {
175 i = base + dy * video_stride;
177 for (dx = 0; dx < g_cube_size; dx++) {
178 di = base + (dx * video_stride) + (g_cube_size - dy - 1);
185 for (dy = 0; dy < g_cube_size; dy++) {
186 di = base + dy * video_stride;
187 i = base + (g_cube_size - dy - 1) * video_stride + g_cube_size;
188 for (dx = 0; dx < g_cube_size; dx++) {
196 for (dy = 0; dy < g_cube_size; dy++) {
197 i = base + (dy * video_stride);
198 for (dx = 0; dx < g_cube_size; dx++) {
199 di = base + dy + (g_cube_size - dx - 1) * video_stride;
206 g_assert_not_reached ();
212 GST_OBJECT_UNLOCK (filter);
214 gst_video_frame_unmap (&in_frame);
215 gst_video_frame_unmap (&out_frame);
221 gst_dicetv_create_map (GstDiceTV * filter)
226 width = GST_VIDEO_INFO_WIDTH (&filter->info);
227 height = GST_VIDEO_INFO_HEIGHT (&filter->info);
229 if (width <= 0 || height <= 0)
232 filter->g_map_height = height >> filter->g_cube_bits;
233 filter->g_map_width = width >> filter->g_cube_bits;
234 filter->g_cube_size = 1 << filter->g_cube_bits;
238 for (y = 0; y < filter->g_map_height; y++) {
239 for (x = 0; x < filter->g_map_width; x++) {
240 // dicemap[i] = ((i + y) & 0x3); /* Up, Down, Left or Right */
241 filter->dicemap[i] = (fastrand () >> 24) & 0x03;
248 gst_dicetv_set_property (GObject * object, guint prop_id, const GValue * value,
251 GstDiceTV *filter = GST_DICETV (object);
255 GST_OBJECT_LOCK (filter);
256 filter->g_cube_bits = g_value_get_int (value);
257 gst_dicetv_create_map (filter);
258 GST_OBJECT_UNLOCK (filter);
261 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
267 gst_dicetv_get_property (GObject * object, guint prop_id, GValue * value,
270 GstDiceTV *filter = GST_DICETV (object);
274 g_value_set_int (value, filter->g_cube_bits);
277 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
283 gst_dicetv_finalize (GObject * object)
285 GstDiceTV *filter = GST_DICETV (object);
287 g_free (filter->dicemap);
288 filter->dicemap = NULL;
290 G_OBJECT_CLASS (parent_class)->finalize (object);
294 gst_dicetv_class_init (GstDiceTVClass * klass)
296 GObjectClass *gobject_class = (GObjectClass *) klass;
297 GstElementClass *gstelement_class = (GstElementClass *) klass;
298 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
300 gobject_class->set_property = gst_dicetv_set_property;
301 gobject_class->get_property = gst_dicetv_get_property;
302 gobject_class->finalize = gst_dicetv_finalize;
304 g_object_class_install_property (gobject_class, PROP_CUBE_BITS,
305 g_param_spec_int ("square-bits", "Square Bits", "The size of the Squares",
306 MIN_CUBE_BITS, MAX_CUBE_BITS, DEFAULT_CUBE_BITS,
307 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
309 gst_element_class_set_details_simple (gstelement_class, "DiceTV effect",
310 "Filter/Effect/Video",
311 "'Dices' the screen up into many small squares",
312 "Wim Taymans <wim.taymans@gmail.be>");
314 gst_element_class_add_pad_template (gstelement_class,
315 gst_static_pad_template_get (&gst_dicetv_sink_template));
316 gst_element_class_add_pad_template (gstelement_class,
317 gst_static_pad_template_get (&gst_dicetv_src_template));
319 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_dicetv_set_caps);
320 trans_class->transform = GST_DEBUG_FUNCPTR (gst_dicetv_transform);
324 gst_dicetv_init (GstDiceTV * filter)
326 filter->dicemap = NULL;
327 filter->g_cube_bits = DEFAULT_CUBE_BITS;
328 filter->g_cube_size = 0;
329 filter->g_map_height = 0;
330 filter->g_map_width = 0;