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>
32 #define rint(x) (floor((x)+0.5))
35 GST_DEBUG_CATEGORY_STATIC (navigationtest_debug);
36 #define GST_CAT_DEFAULT navigationtest_debug
38 static const GstElementDetails navigationtest_details =
39 GST_ELEMENT_DETAILS ("Video navigation test",
40 "Filter/Effect/Video",
41 "Handle navigation events showing a black square following mouse pointer",
42 "David Schleef <ds@schleef.org>");
44 static GstStaticPadTemplate gst_navigationtest_src_template =
45 GST_STATIC_PAD_TEMPLATE ("src",
48 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
51 static GstStaticPadTemplate gst_navigationtest_sink_template =
52 GST_STATIC_PAD_TEMPLATE ("sink",
55 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
58 static GstVideoFilterClass *parent_class = NULL;
61 gst_navigationtest_handle_src_event (GstPad * pad, GstEvent * event)
63 GstNavigationtest *navtest;
66 navtest = GST_NAVIGATIONTEST (GST_PAD_PARENT (pad));
68 switch (GST_EVENT_TYPE (event)) {
69 case GST_EVENT_NAVIGATION:
71 const GstStructure *s = gst_event_get_structure (event);
74 fps_n = gst_value_get_fraction_numerator ((&navtest->framerate));
75 fps_d = gst_value_get_fraction_denominator ((&navtest->framerate));
77 type = gst_structure_get_string (s, "event");
78 if (g_str_equal (type, "mouse-move")) {
79 gst_structure_get_double (s, "pointer_x", &navtest->x);
80 gst_structure_get_double (s, "pointer_y", &navtest->y);
81 } else if (g_str_equal (type, "mouse-button-press")) {
82 ButtonClick *click = g_new (ButtonClick, 1);
84 gst_structure_get_double (s, "pointer_x", &click->x);
85 gst_structure_get_double (s, "pointer_y", &click->y);
86 click->images_left = (fps_n + fps_d - 1) / fps_d;
91 navtest->clicks = g_slist_prepend (navtest->clicks, click);
92 } else if (g_str_equal (type, "mouse-button-release")) {
93 ButtonClick *click = g_new (ButtonClick, 1);
95 gst_structure_get_double (s, "pointer_x", &click->x);
96 gst_structure_get_double (s, "pointer_y", &click->y);
97 click->images_left = (fps_n + fps_d - 1) / fps_d;
102 navtest->clicks = g_slist_prepend (navtest->clicks, click);
109 return gst_pad_event_default (pad, event);
113 #define GST_VIDEO_I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
114 #define GST_VIDEO_I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
115 #define GST_VIDEO_I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(GST_VIDEO_I420_Y_ROWSTRIDE(width)))/2)
117 #define GST_VIDEO_I420_Y_OFFSET(w,h) (0)
118 #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)))
119 #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))
121 #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))
124 gst_navigationtest_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
127 GstNavigationtest *navtest;
128 GstStructure *structure;
129 gboolean ret = FALSE;
132 navtest = GST_NAVIGATIONTEST (btrans);
134 structure = gst_caps_get_structure (caps, 0);
136 if (gst_structure_get_int (structure, "width", &width) &&
137 gst_structure_get_int (structure, "height", &height)) {
138 *size = GST_VIDEO_I420_SIZE (width, height);
140 GST_DEBUG_OBJECT (navtest, "our frame size is %d bytes (%dx%d)", *size,
148 gst_navigationtest_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
151 GstNavigationtest *navtest = GST_NAVIGATIONTEST (btrans);
152 gboolean ret = FALSE;
153 GstStructure *structure;
155 structure = gst_caps_get_structure (incaps, 0);
157 if (gst_structure_get_int (structure, "width", &navtest->width) &&
158 gst_structure_get_int (structure, "height", &navtest->height)) {
159 const GValue *framerate;
161 framerate = gst_structure_get_value (structure, "framerate");
162 if (framerate && GST_VALUE_HOLDS_FRACTION (framerate)) {
163 g_value_copy (framerate, &navtest->framerate);
172 draw_box_planar411 (guint8 * dest, int width, int height, int x, int y,
173 guint8 colory, guint8 coloru, guint8 colorv)
178 if (x < 0 || y < 0 || x >= width || y >= height)
182 x2 = MIN (x + 5, width);
184 y2 = MIN (y + 5, height);
186 for (y = y1; y < y2; y++) {
187 for (x = x1; x < x2; x++) {
188 ((guint8 *) d)[y * GST_VIDEO_I420_Y_ROWSTRIDE (width) + x] = colory;
192 d = dest + GST_VIDEO_I420_U_OFFSET (width, height);
197 for (y = y1; y < y2; y++) {
198 for (x = x1; x < x2; x++) {
199 ((guint8 *) d)[y * GST_VIDEO_I420_U_ROWSTRIDE (width) + x] = coloru;
203 d = dest + GST_VIDEO_I420_V_OFFSET (width, height);
204 for (y = y1; y < y2; y++) {
205 for (x = x1; x < x2; x++) {
206 ((guint8 *) d)[y * GST_VIDEO_I420_V_ROWSTRIDE (width) + x] = colorv;
212 gst_navigationtest_transform (GstBaseTransform * trans, GstBuffer * in,
215 GstNavigationtest *navtest = GST_NAVIGATIONTEST (trans);
217 GstFlowReturn ret = GST_FLOW_OK;
219 /* do something interesting here. This simply copies the source
220 * to the destination. */
221 gst_buffer_copy_metadata (out, in, GST_BUFFER_COPY_TIMESTAMPS);
223 memcpy (GST_BUFFER_DATA (out), GST_BUFFER_DATA (in),
224 MIN (GST_BUFFER_SIZE (in), GST_BUFFER_SIZE (out)));
226 walk = navtest->clicks;
228 ButtonClick *click = walk->data;
230 walk = g_slist_next (walk);
231 draw_box_planar411 (GST_BUFFER_DATA (out), navtest->width, navtest->height,
232 rint (click->x), rint (click->y), click->cy, click->cu, click->cv);
233 if (--click->images_left < 1) {
234 navtest->clicks = g_slist_remove (navtest->clicks, click);
238 draw_box_planar411 (GST_BUFFER_DATA (out), navtest->width, navtest->height,
239 rint (navtest->x), rint (navtest->y), 0, 128, 128);
244 static GstStateChangeReturn
245 gst_navigationtest_change_state (GstElement * element,
246 GstStateChange transition)
248 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
249 GstNavigationtest *navtest = GST_NAVIGATIONTEST (element);
251 if (GST_ELEMENT_CLASS (parent_class)->change_state)
252 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
254 /* downwards state changes */
255 switch (transition) {
256 case GST_STATE_CHANGE_PAUSED_TO_READY:
258 g_slist_foreach (navtest->clicks, (GFunc) g_free, NULL);
259 g_slist_free (navtest->clicks);
260 navtest->clicks = NULL;
271 gst_navigationtest_base_init (gpointer g_class)
273 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
275 gst_element_class_set_details (element_class, &navigationtest_details);
277 gst_element_class_add_pad_template (element_class,
278 gst_static_pad_template_get (&gst_navigationtest_sink_template));
279 gst_element_class_add_pad_template (element_class,
280 gst_static_pad_template_get (&gst_navigationtest_src_template));
284 gst_navigationtest_class_init (gpointer klass, gpointer class_data)
286 GstElementClass *element_class;
287 GstBaseTransformClass *trans_class;
289 element_class = (GstElementClass *) klass;
290 trans_class = (GstBaseTransformClass *) klass;
292 parent_class = g_type_class_peek_parent (klass);
294 element_class->change_state =
295 GST_DEBUG_FUNCPTR (gst_navigationtest_change_state);
297 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_navigationtest_set_caps);
298 trans_class->get_unit_size =
299 GST_DEBUG_FUNCPTR (gst_navigationtest_get_unit_size);
300 trans_class->transform = GST_DEBUG_FUNCPTR (gst_navigationtest_transform);
304 gst_navigationtest_init (GTypeInstance * instance, gpointer g_class)
306 GstNavigationtest *navtest = GST_NAVIGATIONTEST (instance);
307 GstBaseTransform *btrans = GST_BASE_TRANSFORM (instance);
309 gst_pad_set_event_function (btrans->srcpad,
310 GST_DEBUG_FUNCPTR (gst_navigationtest_handle_src_event));
314 g_value_init (&navtest->framerate, GST_TYPE_FRACTION);
318 gst_navigationtest_get_type (void)
320 static GType navigationtest_type = 0;
322 if (!navigationtest_type) {
323 static const GTypeInfo navigationtest_info = {
324 sizeof (GstNavigationtestClass),
325 gst_navigationtest_base_init,
327 gst_navigationtest_class_init,
330 sizeof (GstNavigationtest),
332 gst_navigationtest_init,
335 navigationtest_type = g_type_register_static (GST_TYPE_VIDEO_FILTER,
336 "GstNavigationtest", &navigationtest_info, 0);
338 return navigationtest_type;
342 plugin_init (GstPlugin * plugin)
344 GST_DEBUG_CATEGORY_INIT (navigationtest_debug, "navigationtest", 0,
347 return gst_element_register (plugin, "navigationtest", GST_RANK_NONE,
348 GST_TYPE_NAVIGATIONTEST);
351 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
354 "Template for a video filter",
355 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)