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_frame (GstVideoFilter * vfilter,
82 GstVideoFrame * in_frame, GstVideoFrame * out_frame)
84 GstStreakTV *filter = GST_STREAKTV (vfilter);
87 gint video_area, width, height;
88 guint32 **planetable = filter->planetable;
89 gint plane = filter->plane;
90 guint stride_mask, stride_shift, stride;
92 src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
93 dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
95 width = GST_VIDEO_FRAME_WIDTH (in_frame);
96 height = GST_VIDEO_FRAME_HEIGHT (in_frame);
98 video_area = width * height;
100 GST_OBJECT_LOCK (filter);
101 if (filter->feedback) {
102 stride_mask = 0xfcfcfcfc;
106 stride_mask = 0xf8f8f8f8;
111 for (i = 0; i < video_area; i++) {
112 planetable[plane][i] = (src[i] & stride_mask) >> stride_shift;
115 cf = plane & (stride - 1);
116 if (filter->feedback) {
117 for (i = 0; i < video_area; i++) {
118 dest[i] = planetable[cf][i]
119 + planetable[cf + stride][i]
120 + planetable[cf + stride * 2][i]
121 + planetable[cf + stride * 3][i];
122 planetable[plane][i] = (dest[i] & stride_mask) >> stride_shift;
125 for (i = 0; i < video_area; i++) {
126 dest[i] = planetable[cf][i]
127 + planetable[cf + stride][i]
128 + planetable[cf + stride * 2][i]
129 + planetable[cf + stride * 3][i]
130 + planetable[cf + stride * 4][i]
131 + planetable[cf + stride * 5][i]
132 + planetable[cf + stride * 6][i]
133 + planetable[cf + stride * 7][i];
138 filter->plane = plane & (PLANES - 1);
139 GST_OBJECT_UNLOCK (filter);
145 gst_streaktv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
146 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
148 GstStreakTV *filter = GST_STREAKTV (vfilter);
149 gint i, width, height;
151 width = GST_VIDEO_INFO_WIDTH (in_info);
152 height = GST_VIDEO_INFO_HEIGHT (in_info);
154 if (filter->planebuffer)
155 g_free (filter->planebuffer);
157 filter->planebuffer = g_new0 (guint32, width * height * 4 * PLANES);
159 for (i = 0; i < PLANES; i++)
160 filter->planetable[i] = &filter->planebuffer[width * height * i];
166 gst_streaktv_start (GstBaseTransform * trans)
168 GstStreakTV *filter = GST_STREAKTV (trans);
176 gst_streaktv_finalize (GObject * object)
178 GstStreakTV *filter = GST_STREAKTV (object);
180 if (filter->planebuffer) {
181 g_free (filter->planebuffer);
182 filter->planebuffer = NULL;
185 G_OBJECT_CLASS (parent_class)->finalize (object);
189 gst_streaktv_set_property (GObject * object, guint prop_id,
190 const GValue * value, GParamSpec * pspec)
192 GstStreakTV *filter = GST_STREAKTV (object);
196 if (G_UNLIKELY (GST_STATE (filter) >= GST_STATE_PAUSED)) {
197 g_warning ("Changing the \"feedback\" property only allowed "
198 "in state < PLAYING");
202 filter->feedback = g_value_get_boolean (value);
205 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
211 gst_streaktv_get_property (GObject * object, guint prop_id, GValue * value,
214 GstStreakTV *filter = GST_STREAKTV (object);
218 g_value_set_boolean (value, filter->feedback);
221 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
227 gst_streaktv_class_init (GstStreakTVClass * klass)
229 GObjectClass *gobject_class = (GObjectClass *) klass;
230 GstElementClass *gstelement_class = (GstElementClass *) klass;
231 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
232 GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
234 gobject_class->set_property = gst_streaktv_set_property;
235 gobject_class->get_property = gst_streaktv_get_property;
237 gobject_class->finalize = gst_streaktv_finalize;
239 g_object_class_install_property (gobject_class, PROP_FEEDBACK,
240 g_param_spec_boolean ("feedback", "Feedback",
241 "Feedback", DEFAULT_FEEDBACK,
242 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
244 gst_element_class_set_static_metadata (gstelement_class, "StreakTV effect",
245 "Filter/Effect/Video",
246 "StreakTV makes after images of moving objects",
247 "FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>, "
248 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
250 gst_element_class_add_pad_template (gstelement_class,
251 gst_static_pad_template_get (&gst_streaktv_sink_template));
252 gst_element_class_add_pad_template (gstelement_class,
253 gst_static_pad_template_get (&gst_streaktv_src_template));
255 trans_class->start = GST_DEBUG_FUNCPTR (gst_streaktv_start);
257 vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_streaktv_set_info);
258 vfilter_class->transform_frame =
259 GST_DEBUG_FUNCPTR (gst_streaktv_transform_frame);
263 gst_streaktv_init (GstStreakTV * filter)
265 filter->feedback = DEFAULT_FEEDBACK;