2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
5 * Copyright (C) 2001 FUKUCHI Kentarou
7 * EffecTV is free software. This library is free software;
8 * you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 * SECTION:element-vertigotv
27 * VertigoTV is a loopback alpha blending effector with rotating and scaling.
30 * <title>Example launch line</title>
32 * gst-launch -v videotestsrc ! vertigotv ! videoconvert ! autovideosink
33 * ]| This pipeline shows the effect of vertigotv on a test stream.
44 #include "gstvertigo.h"
46 #include <gst/controller/gstcontroller.h>
48 #define gst_vertigotv_parent_class parent_class
49 G_DEFINE_TYPE (GstVertigoTV, gst_vertigotv, GST_TYPE_VIDEO_FILTER);
51 /* Filter signals and args */
59 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
60 #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ RGBx, BGRx }")
62 #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xRGB, xBGR }")
65 static GstStaticPadTemplate gst_vertigotv_src_template =
66 GST_STATIC_PAD_TEMPLATE ("src",
69 GST_STATIC_CAPS (CAPS_STR)
72 static GstStaticPadTemplate gst_vertigotv_sink_template =
73 GST_STATIC_PAD_TEMPLATE ("sink",
76 GST_STATIC_CAPS (CAPS_STR)
80 gst_vertigotv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
83 GstVertigoTV *filter = GST_VERTIGOTV (btrans);
85 gint area, width, height;
87 if (!gst_video_info_from_caps (&info, incaps))
92 width = GST_VIDEO_INFO_WIDTH (&info);
93 height = GST_VIDEO_INFO_HEIGHT (&info);
95 area = width * height;
97 g_free (filter->buffer);
98 filter->buffer = (guint32 *) g_malloc0 (area * 2 * sizeof (guint32));
100 filter->current_buffer = filter->buffer;
101 filter->alt_buffer = filter->buffer + area;
109 GST_DEBUG_OBJECT (filter, "invalid caps received");
115 gst_vertigotv_set_parms (GstVertigoTV * filter)
123 dizz = sin (filter->phase) * 10 + sin (filter->phase * 1.9 + 5) * 5;
125 width = GST_VIDEO_INFO_WIDTH (&filter->info);
126 height = GST_VIDEO_INFO_HEIGHT (&filter->info);
131 t = (x * x + y * y) * filter->zoomrate;
133 if (width > height) {
137 vx = (x * (x - dizz) + y * y) / t;
141 vx = (x * (x + dizz) + y * y) / t;
148 vx = (x * x + y * (y - dizz)) / t;
152 vx = (x * x + y * (y + dizz)) / t;
156 filter->dx = vx * 65536;
157 filter->dy = vy * 65536;
158 filter->sx = (-vx * x + vy * y + x + cos (filter->phase * 5) * 2) * 65536;
159 filter->sy = (-vx * y - vy * x + y + sin (filter->phase * 6) * 2) * 65536;
161 filter->phase += filter->phase_increment;
162 if (filter->phase > 5700000)
167 gst_vertigotv_transform (GstBaseTransform * trans, GstBuffer * in,
170 GstVertigoTV *filter = GST_VERTIGOTV (trans);
171 guint32 *src, *dest, *p;
173 gint x, y, ox, oy, i, width, height, area;
174 GstClockTime timestamp, stream_time;
175 GstVideoFrame in_frame, out_frame;
177 timestamp = GST_BUFFER_TIMESTAMP (in);
179 gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME, timestamp);
181 GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
182 GST_TIME_ARGS (timestamp));
184 if (GST_CLOCK_TIME_IS_VALID (stream_time))
185 gst_object_sync_values (G_OBJECT (filter), stream_time);
187 if (!gst_video_frame_map (&in_frame, &filter->info, in, GST_MAP_READ))
190 if (!gst_video_frame_map (&out_frame, &filter->info, out, GST_MAP_WRITE))
193 src = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
194 dest = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
196 width = GST_VIDEO_FRAME_WIDTH (&in_frame);
197 height = GST_VIDEO_FRAME_HEIGHT (&in_frame);
199 area = width * height;
201 gst_vertigotv_set_parms (filter);
202 p = filter->alt_buffer;
204 for (y = height; y > 0; y--) {
208 for (x = width; x > 0; x--) {
209 i = (oy >> 16) * width + (ox >> 16);
215 v = filter->current_buffer[i] & 0xfcfcff;
216 v = (v * 3) + ((*src++) & 0xfcfcff);
222 filter->sx -= filter->dy;
223 filter->sy += filter->dx;
226 memcpy (dest, filter->alt_buffer, area * sizeof (guint32));
228 p = filter->current_buffer;
229 filter->current_buffer = filter->alt_buffer;
230 filter->alt_buffer = p;
237 GST_DEBUG_OBJECT (filter, "invalid input frame");
238 return GST_FLOW_ERROR;
242 GST_DEBUG_OBJECT (filter, "invalid output frame");
243 gst_video_frame_unmap (&in_frame);
244 return GST_FLOW_ERROR;
250 gst_vertigotv_start (GstBaseTransform * trans)
252 GstVertigoTV *filter = GST_VERTIGOTV (trans);
260 gst_vertigotv_set_property (GObject * object, guint prop_id,
261 const GValue * value, GParamSpec * pspec)
263 GstVertigoTV *filter = GST_VERTIGOTV (object);
265 GST_OBJECT_LOCK (filter);
268 filter->phase_increment = g_value_get_float (value);
270 case PROP_ZOOM_SPEED:
271 filter->zoomrate = g_value_get_float (value);
276 GST_OBJECT_UNLOCK (filter);
280 gst_vertigotv_get_property (GObject * object, guint prop_id, GValue * value,
283 GstVertigoTV *filter = GST_VERTIGOTV (object);
287 g_value_set_float (value, filter->phase_increment);
289 case PROP_ZOOM_SPEED:
290 g_value_set_float (value, filter->zoomrate);
293 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
299 gst_vertigotv_finalize (GObject * object)
301 GstVertigoTV *filter = GST_VERTIGOTV (object);
303 g_free (filter->buffer);
304 filter->buffer = NULL;
306 G_OBJECT_CLASS (parent_class)->finalize (object);
310 gst_vertigotv_class_init (GstVertigoTVClass * klass)
312 GObjectClass *gobject_class = (GObjectClass *) klass;
313 GstElementClass *gstelement_class = (GstElementClass *) klass;
314 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
316 gobject_class->set_property = gst_vertigotv_set_property;
317 gobject_class->get_property = gst_vertigotv_get_property;
318 gobject_class->finalize = gst_vertigotv_finalize;
320 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SPEED,
321 g_param_spec_float ("speed", "Speed", "Control the speed of movement",
322 0.01, 100.0, 0.02, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
323 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ZOOM_SPEED,
324 g_param_spec_float ("zoom-speed", "Zoom Speed",
325 "Control the rate of zooming", 1.01, 1.1, 1.01,
326 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
328 gst_element_class_set_details_simple (gstelement_class, "VertigoTV effect",
329 "Filter/Effect/Video",
330 "A loopback alpha blending effector with rotating and scaling",
331 "Wim Taymans <wim.taymans@gmail.be>");
333 gst_element_class_add_pad_template (gstelement_class,
334 gst_static_pad_template_get (&gst_vertigotv_sink_template));
335 gst_element_class_add_pad_template (gstelement_class,
336 gst_static_pad_template_get (&gst_vertigotv_src_template));
338 trans_class->start = GST_DEBUG_FUNCPTR (gst_vertigotv_start);
339 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_vertigotv_set_caps);
340 trans_class->transform = GST_DEBUG_FUNCPTR (gst_vertigotv_transform);
344 gst_vertigotv_init (GstVertigoTV * filter)
346 filter->buffer = NULL;
348 filter->phase_increment = 0.02;
349 filter->zoomrate = 1.01;
351 gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (filter));
352 gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (filter));