2 * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
4 * EffecTV - Realtime Digital Video Effector
5 * Copyright (C) 2001-2006 FUKUCHI Kentaro
7 * StreakTV - afterimage effector.
8 * Copyright (C) 2001-2002 FUKUCHI Kentaro
10 * This combines the StreakTV and BaltanTV effects, which are
11 * very similar. BaltanTV is used if the feedback property is set
12 * to TRUE, otherwise StreakTV is used.
14 * EffecTV is free software. This library is free software;
15 * you can redistribute it and/or
16 * modify it under the terms of the GNU Library General Public
17 * License as published by the Free Software Foundation; either
18 * version 2 of the License, or (at your option) any later version.
20 * This library is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 * Library General Public License for more details.
25 * You should have received a copy of the GNU Library General Public
26 * License along with this library; if not, write to the
27 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
28 * Boston, MA 02111-1307, USA.
32 * SECTION:element-streaktv
34 * StreakTV makes after images of moving objects.
37 * <title>Example launch line</title>
39 * gst-launch -v videotestsrc ! streaktv ! videoconvert ! autovideosink
40 * ]| This pipeline shows the effect of streaktv on a test stream.
51 #include "gststreak.h"
52 #include "gsteffectv.h"
54 #define DEFAULT_FEEDBACK FALSE
62 #define gst_streaktv_parent_class parent_class
63 G_DEFINE_TYPE (GstStreakTV, gst_streaktv, GST_TYPE_VIDEO_FILTER);
65 static GstStaticPadTemplate gst_streaktv_src_template =
66 GST_STATIC_PAD_TEMPLATE ("src",
69 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx, xBGR, xRGB }"))
72 static GstStaticPadTemplate gst_streaktv_sink_template =
73 GST_STATIC_PAD_TEMPLATE ("sink",
76 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx, xBGR, xRGB }"))
81 gst_streaktv_transform (GstBaseTransform * trans, GstBuffer * in,
84 GstStreakTV *filter = GST_STREAKTV (trans);
86 GstVideoFrame in_frame, out_frame;
88 gint video_area, width, height;
89 guint32 **planetable = filter->planetable;
90 gint plane = filter->plane;
91 guint stride_mask, stride_shift, stride;
93 if (!gst_video_frame_map (&in_frame, &filter->info, in, GST_MAP_READ))
96 if (!gst_video_frame_map (&out_frame, &filter->info, out, GST_MAP_WRITE))
99 src = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
100 dest = GST_VIDEO_FRAME_PLANE_DATA (&out_frame, 0);
102 width = GST_VIDEO_FRAME_WIDTH (&in_frame);
103 height = GST_VIDEO_FRAME_HEIGHT (&in_frame);
105 video_area = width * height;
107 GST_OBJECT_LOCK (filter);
108 if (filter->feedback) {
109 stride_mask = 0xfcfcfcfc;
113 stride_mask = 0xf8f8f8f8;
118 for (i = 0; i < video_area; i++) {
119 planetable[plane][i] = (src[i] & stride_mask) >> stride_shift;
122 cf = plane & (stride - 1);
123 if (filter->feedback) {
124 for (i = 0; i < video_area; i++) {
125 dest[i] = planetable[cf][i]
126 + planetable[cf + stride][i]
127 + planetable[cf + stride * 2][i]
128 + planetable[cf + stride * 3][i];
129 planetable[plane][i] = (dest[i] & stride_mask) >> stride_shift;
132 for (i = 0; i < video_area; i++) {
133 dest[i] = planetable[cf][i]
134 + planetable[cf + stride][i]
135 + planetable[cf + stride * 2][i]
136 + planetable[cf + stride * 3][i]
137 + planetable[cf + stride * 4][i]
138 + planetable[cf + stride * 5][i]
139 + planetable[cf + stride * 6][i]
140 + planetable[cf + stride * 7][i];
145 filter->plane = plane & (PLANES - 1);
146 GST_OBJECT_UNLOCK (filter);
148 gst_video_frame_unmap (&in_frame);
149 gst_video_frame_unmap (&out_frame);
156 GST_DEBUG_OBJECT (filter, "invalid input frame");
157 return GST_FLOW_ERROR;
161 GST_DEBUG_OBJECT (filter, "invalid output frame");
162 gst_video_frame_unmap (&in_frame);
163 return GST_FLOW_ERROR;
168 gst_streaktv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
171 GstStreakTV *filter = GST_STREAKTV (btrans);
173 gint i, width, height;
175 if (!gst_video_info_from_caps (&info, incaps))
180 width = GST_VIDEO_INFO_WIDTH (&info);
181 height = GST_VIDEO_INFO_HEIGHT (&info);
183 if (filter->planebuffer)
184 g_free (filter->planebuffer);
186 filter->planebuffer = g_new0 (guint32, width * height * 4 * PLANES);
188 for (i = 0; i < PLANES; i++)
189 filter->planetable[i] = &filter->planebuffer[width * height * i];
196 GST_DEBUG_OBJECT (filter, "invalid caps received");
202 gst_streaktv_start (GstBaseTransform * trans)
204 GstStreakTV *filter = GST_STREAKTV (trans);
212 gst_streaktv_finalize (GObject * object)
214 GstStreakTV *filter = GST_STREAKTV (object);
216 if (filter->planebuffer) {
217 g_free (filter->planebuffer);
218 filter->planebuffer = NULL;
221 G_OBJECT_CLASS (parent_class)->finalize (object);
225 gst_streaktv_set_property (GObject * object, guint prop_id,
226 const GValue * value, GParamSpec * pspec)
228 GstStreakTV *filter = GST_STREAKTV (object);
232 if (G_UNLIKELY (GST_STATE (filter) >= GST_STATE_PAUSED)) {
233 g_warning ("Changing the \"feedback\" property only allowed "
234 "in state < PLAYING");
238 filter->feedback = g_value_get_boolean (value);
241 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
247 gst_streaktv_get_property (GObject * object, guint prop_id, GValue * value,
250 GstStreakTV *filter = GST_STREAKTV (object);
254 g_value_set_boolean (value, filter->feedback);
257 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
263 gst_streaktv_class_init (GstStreakTVClass * klass)
265 GObjectClass *gobject_class = (GObjectClass *) klass;
266 GstElementClass *gstelement_class = (GstElementClass *) klass;
267 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
269 gobject_class->set_property = gst_streaktv_set_property;
270 gobject_class->get_property = gst_streaktv_get_property;
272 gobject_class->finalize = gst_streaktv_finalize;
274 g_object_class_install_property (gobject_class, PROP_FEEDBACK,
275 g_param_spec_boolean ("feedback", "Feedback",
276 "Feedback", DEFAULT_FEEDBACK,
277 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
279 gst_element_class_set_details_simple (gstelement_class, "StreakTV effect",
280 "Filter/Effect/Video",
281 "StreakTV makes after images of moving objects",
282 "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>, "
283 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
285 gst_element_class_add_pad_template (gstelement_class,
286 gst_static_pad_template_get (&gst_streaktv_sink_template));
287 gst_element_class_add_pad_template (gstelement_class,
288 gst_static_pad_template_get (&gst_streaktv_src_template));
290 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_streaktv_set_caps);
291 trans_class->transform = GST_DEBUG_FUNCPTR (gst_streaktv_transform);
292 trans_class->start = GST_DEBUG_FUNCPTR (gst_streaktv_start);
296 gst_streaktv_init (GstStreakTV * filter)
298 filter->feedback = DEFAULT_FEEDBACK;