2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
25 #include "gstnavigationtest.h"
29 #include <gst/video/video.h>
31 GST_DEBUG_CATEGORY (navigationtest_debug);
32 #define GST_CAT_DEFAULT navigationtest_debug
34 static GstElementDetails navigationtest_details =
35 GST_ELEMENT_DETAILS ("Video Navigation test",
36 "Filter/Effect/Video",
37 "Handle navigation events showing a black square following mouse pointer",
38 "David Schleef <ds@schleef.org>");
40 static GstStaticPadTemplate gst_navigationtest_src_template =
41 GST_STATIC_PAD_TEMPLATE ("src",
44 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
47 static GstStaticPadTemplate gst_navigationtest_sink_template =
48 GST_STATIC_PAD_TEMPLATE ("sink",
51 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
54 static GstVideofilterClass *parent_class = NULL;
57 gst_navigationtest_handle_src_event (GstPad * pad, GstEvent * event)
59 GstNavigationtest *navtest;
62 navtest = GST_NAVIGATIONTEST (GST_PAD_PARENT (pad));
64 switch (GST_EVENT_TYPE (event)) {
65 case GST_EVENT_NAVIGATION:
67 const GstStructure *s = gst_event_get_structure (event);
70 fps_n = gst_value_get_fraction_numerator ((&navtest->framerate));
71 fps_d = gst_value_get_fraction_denominator ((&navtest->framerate));
73 type = gst_structure_get_string (s, "event");
74 if (g_str_equal (type, "mouse-move")) {
75 gst_structure_get_double (s, "pointer_x", &navtest->x);
76 gst_structure_get_double (s, "pointer_y", &navtest->y);
77 } else if (g_str_equal (type, "mouse-button-press")) {
78 ButtonClick *click = g_new (ButtonClick, 1);
80 gst_structure_get_double (s, "pointer_x", &click->x);
81 gst_structure_get_double (s, "pointer_y", &click->y);
82 click->images_left = (fps_n + fps_d - 1) / fps_d;
87 navtest->clicks = g_slist_prepend (navtest->clicks, click);
88 } else if (g_str_equal (type, "mouse-button-release")) {
89 ButtonClick *click = g_new (ButtonClick, 1);
91 gst_structure_get_double (s, "pointer_x", &click->x);
92 gst_structure_get_double (s, "pointer_y", &click->y);
93 click->images_left = (fps_n + fps_d - 1) / fps_d;
98 navtest->clicks = g_slist_prepend (navtest->clicks, click);
105 return gst_pad_event_default (pad, event);
109 #define GST_VIDEO_I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
110 #define GST_VIDEO_I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
111 #define GST_VIDEO_I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(GST_VIDEO_I420_Y_ROWSTRIDE(width)))/2)
113 #define GST_VIDEO_I420_Y_OFFSET(w,h) (0)
114 #define GST_VIDEO_I420_U_OFFSET(w,h) (GST_VIDEO_I420_Y_OFFSET(w,h)+(GST_VIDEO_I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
115 #define GST_VIDEO_I420_V_OFFSET(w,h) (GST_VIDEO_I420_U_OFFSET(w,h)+(GST_VIDEO_I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
117 #define GST_VIDEO_I420_SIZE(w,h) (GST_VIDEO_I420_V_OFFSET(w,h)+(GST_VIDEO_I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
120 gst_navigationtest_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
123 GstNavigationtest *navtest;
124 GstStructure *structure;
125 gboolean ret = FALSE;
128 navtest = GST_NAVIGATIONTEST (btrans);
130 structure = gst_caps_get_structure (caps, 0);
132 if (gst_structure_get_int (structure, "width", &width) &&
133 gst_structure_get_int (structure, "height", &height)) {
134 *size = GST_VIDEO_I420_SIZE (width, height);
136 GST_DEBUG_OBJECT (navtest, "our frame size is %d bytes (%dx%d)", *size,
144 gst_navigationtest_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
147 GstNavigationtest *navtest = GST_NAVIGATIONTEST (btrans);
148 gboolean ret = FALSE;
149 GstStructure *structure;
151 structure = gst_caps_get_structure (incaps, 0);
153 if (gst_structure_get_int (structure, "width", &navtest->width) &&
154 gst_structure_get_int (structure, "height", &navtest->height)) {
155 const GValue *framerate;
157 framerate = gst_structure_get_value (structure, "framerate");
158 if (framerate && GST_VALUE_HOLDS_FRACTION (framerate)) {
159 g_value_copy (framerate, &navtest->framerate);
168 draw_box_planar411 (guint8 * dest, int width, int height, int x, int y,
169 guint8 colory, guint8 coloru, guint8 colorv)
173 if (x < 0 || y < 0 || x >= width || y >= height)
177 x2 = MIN (x + 5, width);
179 y2 = MIN (y + 5, height);
181 for (y = y1; y < y2; y++) {
182 for (x = x1; x < x2; x++) {
183 ((guint8 *) dest)[y * width + x] = colory;
187 dest += height * width;
194 for (y = y1; y < y2; y++) {
195 for (x = x1; x < x2; x++) {
196 ((guint8 *) dest)[y * width + x] = coloru;
200 dest += height * width;
201 for (y = y1; y < y2; y++) {
202 for (x = x1; x < x2; x++) {
203 ((guint8 *) dest)[y * width + x] = colorv;
209 gst_navigationtest_transform (GstBaseTransform * trans, GstBuffer * in,
212 GstNavigationtest *navtest = GST_NAVIGATIONTEST (trans);
214 GstFlowReturn ret = GST_FLOW_OK;
216 /* do something interesting here. This simply copies the source
217 * to the destination. */
218 gst_buffer_stamp (out, in);
220 memcpy (GST_BUFFER_DATA (out), GST_BUFFER_DATA (in),
221 MIN (GST_BUFFER_SIZE (in), GST_BUFFER_SIZE (out)));
223 walk = navtest->clicks;
225 ButtonClick *click = walk->data;
227 walk = g_slist_next (walk);
228 draw_box_planar411 (GST_BUFFER_DATA (out), navtest->width, navtest->height,
229 rint (click->x), rint (click->y), click->cy, click->cu, click->cv);
230 if (--click->images_left < 1) {
231 navtest->clicks = g_slist_remove (navtest->clicks, click);
235 draw_box_planar411 (GST_BUFFER_DATA (out), navtest->width, navtest->height,
236 rint (navtest->x), rint (navtest->y), 0, 128, 128);
241 static GstStateChangeReturn
242 gst_navigationtest_change_state (GstElement * element,
243 GstStateChange transition)
245 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
246 GstNavigationtest *navtest = GST_NAVIGATIONTEST (element);
248 if (GST_ELEMENT_CLASS (parent_class)->change_state)
249 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
251 /* downwards state changes */
252 switch (transition) {
253 case GST_STATE_CHANGE_PAUSED_TO_READY:
255 g_slist_foreach (navtest->clicks, (GFunc) g_free, NULL);
256 g_slist_free (navtest->clicks);
257 navtest->clicks = NULL;
268 gst_navigationtest_base_init (gpointer g_class)
270 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
272 gst_element_class_set_details (element_class, &navigationtest_details);
274 gst_element_class_add_pad_template (element_class,
275 gst_static_pad_template_get (&gst_navigationtest_sink_template));
276 gst_element_class_add_pad_template (element_class,
277 gst_static_pad_template_get (&gst_navigationtest_src_template));
281 gst_navigationtest_class_init (gpointer klass, gpointer class_data)
283 GObjectClass *gobject_class;
284 GstElementClass *element_class;
285 GstBaseTransformClass *trans_class;
287 gobject_class = (GObjectClass *) klass;
288 element_class = (GstElementClass *) klass;
289 trans_class = (GstBaseTransformClass *) klass;
291 parent_class = g_type_class_peek_parent (klass);
293 element_class->change_state =
294 GST_DEBUG_FUNCPTR (gst_navigationtest_change_state);
296 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_navigationtest_set_caps);
297 trans_class->get_unit_size =
298 GST_DEBUG_FUNCPTR (gst_navigationtest_get_unit_size);
299 trans_class->transform = GST_DEBUG_FUNCPTR (gst_navigationtest_transform);
303 gst_navigationtest_init (GTypeInstance * instance, gpointer g_class)
305 GstNavigationtest *navtest = GST_NAVIGATIONTEST (instance);
306 GstBaseTransform *btrans = GST_BASE_TRANSFORM (instance);
308 gst_pad_set_event_function (btrans->srcpad,
309 GST_DEBUG_FUNCPTR (gst_navigationtest_handle_src_event));
316 gst_navigationtest_get_type (void)
318 static GType navigationtest_type = 0;
320 if (!navigationtest_type) {
321 static const GTypeInfo navigationtest_info = {
322 sizeof (GstNavigationtestClass),
323 gst_navigationtest_base_init,
325 gst_navigationtest_class_init,
328 sizeof (GstNavigationtest),
330 gst_navigationtest_init,
333 navigationtest_type = g_type_register_static (GST_TYPE_VIDEOFILTER,
334 "GstNavigationtest", &navigationtest_info, 0);
336 return navigationtest_type;
340 plugin_init (GstPlugin * plugin)
342 GST_DEBUG_CATEGORY_INIT (navigationtest_debug, "navigationtest", 0,
345 return gst_element_register (plugin, "navigationtest", GST_RANK_NONE,
346 GST_TYPE_NAVIGATIONTEST);
349 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
352 "Template for a video filter",
353 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)