1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
4 *
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.
9 *
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.
14 *
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., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include "gstnavigationtest.h"
26 #include <string.h>
27 #include <math.h>
28
29 #include <gst/video/video.h>
30
31 #ifdef _MSC_VER
32 #define rint(x) (floor((x)+0.5))
33 #endif
34
35 GST_DEBUG_CATEGORY_STATIC (navigationtest_debug);
36 #define GST_CAT_DEFAULT navigationtest_debug
37
38 static GstStaticPadTemplate gst_navigationtest_src_template =
39 GST_STATIC_PAD_TEMPLATE ("src",
40 GST_PAD_SRC,
41 GST_PAD_ALWAYS,
42 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420"))
43 );
44
45 static GstStaticPadTemplate gst_navigationtest_sink_template =
46 GST_STATIC_PAD_TEMPLATE ("sink",
47 GST_PAD_SINK,
48 GST_PAD_ALWAYS,
49 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420"))
50 );
51
52 #define gst_navigationtest_parent_class parent_class
53 G_DEFINE_TYPE (GstNavigationtest, gst_navigationtest, GST_TYPE_VIDEO_FILTER);
54 GST_ELEMENT_REGISTER_DEFINE (navigationtest, "navigationtest", GST_RANK_NONE,
55 GST_TYPE_NAVIGATIONTEST);
56
57 static gboolean
gst_navigationtest_src_event(GstBaseTransform * trans,GstEvent * event)58 gst_navigationtest_src_event (GstBaseTransform * trans, GstEvent * event)
59 {
60 GstVideoInfo *info;
61 GstNavigationtest *navtest;
62 const gchar *type;
63
64 navtest = GST_NAVIGATIONTEST (trans);
65
66 info = &GST_VIDEO_FILTER (trans)->in_info;
67
68 switch (GST_EVENT_TYPE (event)) {
69 case GST_EVENT_NAVIGATION:
70 {
71 const GstStructure *s = gst_event_get_structure (event);
72 gint fps_n, fps_d;
73
74 fps_n = GST_VIDEO_INFO_FPS_N (info);
75 fps_d = GST_VIDEO_INFO_FPS_D (info);
76
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);
83
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;
87 /* green */
88 click->cy = 150;
89 click->cu = 46;
90 click->cv = 21;
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);
94
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;
98 /* red */
99 click->cy = 76;
100 click->cu = 85;
101 click->cv = 255;
102 navtest->clicks = g_slist_prepend (navtest->clicks, click);
103 }
104 break;
105 }
106 default:
107 break;
108 }
109 return GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event);
110 }
111
112 /* Useful macros */
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)
116
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))
120
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))
122
123 static void
draw_box_planar411(GstVideoFrame * frame,int x,int y,guint8 colory,guint8 coloru,guint8 colorv)124 draw_box_planar411 (GstVideoFrame * frame, int x, int y,
125 guint8 colory, guint8 coloru, guint8 colorv)
126 {
127 gint width, height;
128 int x1, x2, y1, y2;
129 guint8 *d;
130 gint stride;
131
132 width = GST_VIDEO_FRAME_WIDTH (frame);
133 height = GST_VIDEO_FRAME_HEIGHT (frame);
134
135 if (x < 0 || y < 0 || x >= width || y >= height)
136 return;
137
138 x1 = MAX (x - 5, 0);
139 x2 = MIN (x + 5, width);
140 y1 = MAX (y - 5, 0);
141 y2 = MIN (y + 5, height);
142
143 d = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
144 stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
145
146 for (y = y1; y < y2; y++) {
147 for (x = x1; x < x2; x++) {
148 d[y * stride + x] = colory;
149 }
150 }
151
152 d = GST_VIDEO_FRAME_PLANE_DATA (frame, 1);
153 stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 1);
154
155 x1 /= 2;
156 x2 /= 2;
157 y1 /= 2;
158 y2 /= 2;
159 for (y = y1; y < y2; y++) {
160 for (x = x1; x < x2; x++) {
161 d[y * stride + x] = coloru;
162 }
163 }
164
165 d = GST_VIDEO_FRAME_PLANE_DATA (frame, 2);
166 stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 2);
167
168 for (y = y1; y < y2; y++) {
169 for (x = x1; x < x2; x++) {
170 d[y * stride + x] = colorv;
171 }
172 }
173 }
174
175 static GstFlowReturn
gst_navigationtest_transform_frame(GstVideoFilter * filter,GstVideoFrame * in_frame,GstVideoFrame * out_frame)176 gst_navigationtest_transform_frame (GstVideoFilter * filter,
177 GstVideoFrame * in_frame, GstVideoFrame * out_frame)
178 {
179 GstNavigationtest *navtest = GST_NAVIGATIONTEST (filter);
180 GSList *walk;
181
182 gst_video_frame_copy (out_frame, in_frame);
183
184 walk = navtest->clicks;
185 while (walk) {
186 ButtonClick *click = walk->data;
187
188 walk = g_slist_next (walk);
189 draw_box_planar411 (out_frame,
190 rint (click->x), rint (click->y), click->cy, click->cu, click->cv);
191 if (--click->images_left < 1) {
192 navtest->clicks = g_slist_remove (navtest->clicks, click);
193 g_free (click);
194 }
195 }
196 draw_box_planar411 (out_frame,
197 rint (navtest->x), rint (navtest->y), 0, 128, 128);
198
199 return GST_FLOW_OK;
200 }
201
202 static GstStateChangeReturn
gst_navigationtest_change_state(GstElement * element,GstStateChange transition)203 gst_navigationtest_change_state (GstElement * element,
204 GstStateChange transition)
205 {
206 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
207 GstNavigationtest *navtest = GST_NAVIGATIONTEST (element);
208
209 if (GST_ELEMENT_CLASS (parent_class)->change_state)
210 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
211
212 /* downwards state changes */
213 switch (transition) {
214 case GST_STATE_CHANGE_PAUSED_TO_READY:
215 {
216 g_slist_foreach (navtest->clicks, (GFunc) g_free, NULL);
217 g_slist_free (navtest->clicks);
218 navtest->clicks = NULL;
219 break;
220 }
221 default:
222 break;
223 }
224
225 return ret;
226 }
227
228 static void
gst_navigationtest_class_init(GstNavigationtestClass * klass)229 gst_navigationtest_class_init (GstNavigationtestClass * klass)
230 {
231 GstElementClass *element_class;
232 GstBaseTransformClass *trans_class;
233 GstVideoFilterClass *vfilter_class;
234
235 element_class = (GstElementClass *) klass;
236 trans_class = (GstBaseTransformClass *) klass;
237 vfilter_class = (GstVideoFilterClass *) klass;
238
239 element_class->change_state =
240 GST_DEBUG_FUNCPTR (gst_navigationtest_change_state);
241
242 gst_element_class_set_static_metadata (element_class, "Video navigation test",
243 "Filter/Effect/Video",
244 "Handle navigation events showing a black square following mouse pointer",
245 "David Schleef <ds@schleef.org>");
246
247 gst_element_class_add_static_pad_template (element_class,
248 &gst_navigationtest_sink_template);
249 gst_element_class_add_static_pad_template (element_class,
250 &gst_navigationtest_src_template);
251
252 trans_class->src_event = GST_DEBUG_FUNCPTR (gst_navigationtest_src_event);
253
254 vfilter_class->transform_frame =
255 GST_DEBUG_FUNCPTR (gst_navigationtest_transform_frame);
256 }
257
258 static void
gst_navigationtest_init(GstNavigationtest * navtest)259 gst_navigationtest_init (GstNavigationtest * navtest)
260 {
261 navtest->x = -1;
262 navtest->y = -1;
263 }
264
265 static gboolean
plugin_init(GstPlugin * plugin)266 plugin_init (GstPlugin * plugin)
267 {
268 GST_DEBUG_CATEGORY_INIT (navigationtest_debug, "navigationtest", 0,
269 "navigationtest");
270
271 return GST_ELEMENT_REGISTER (navigationtest, plugin);
272 }
273
274 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
275 GST_VERSION_MINOR,
276 navigationtest,
277 "Template for a video filter",
278 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
279