2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
5 * EffecTV - Realtime Digital Video Effector
6 * Copyright (C) 2001 FUKUCHI Kentarou
8 * This library is free software; 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 * This file was (probably) generated from gstvideotemplate.c,
26 * gstvideotemplate.c,v 1.11 2004/01/07 08:56:45 ds Exp
29 /* From main.c of warp-1.1:
31 * Simple DirectMedia Layer demo
32 * Realtime picture 'gooing'
33 * by sam lantinga slouken@devolution.com
37 * SECTION:element-warptv
39 * WarpTV does realtime goo'ing of the video input.
42 * <title>Example launch line</title>
44 * gst-launch -v videotestsrc ! warptv ! ffmpegcolorspace ! autovideosink
45 * ]| This pipeline shows the effect of warptv on a test stream.
59 #define M_PI 3.14159265358979323846
62 #define gst_warptv_parent_class parent_class
63 G_DEFINE_TYPE (GstWarpTV, gst_warptv, GST_TYPE_VIDEO_FILTER);
65 static void initSinTable ();
66 static void initOffsTable (GstWarpTV * filter, gint width, gint height);
67 static void initDistTable (GstWarpTV * filter, gint width, gint height);
69 static GstStaticPadTemplate gst_warptv_src_template =
70 GST_STATIC_PAD_TEMPLATE ("src",
73 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
76 static GstStaticPadTemplate gst_warptv_sink_template =
77 GST_STATIC_PAD_TEMPLATE ("sink",
80 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
84 gst_warptv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
87 GstWarpTV *filter = GST_WARPTV (btrans);
91 if (!gst_video_info_from_caps (&info, incaps))
96 width = GST_VIDEO_INFO_WIDTH (&info);
97 height = GST_VIDEO_INFO_HEIGHT (&info);
99 g_free (filter->disttable);
100 g_free (filter->offstable);
101 filter->offstable = g_malloc (height * sizeof (guint32));
102 filter->disttable = g_malloc (width * height * sizeof (guint32));
103 initOffsTable (filter, width, height);
104 initDistTable (filter, width, height);
111 GST_DEBUG_OBJECT (filter, "invalid caps received");
116 static gint32 sintable[1024 + 256];
121 gint32 *tptr, *tsinptr;
124 tsinptr = tptr = sintable;
126 for (i = 0; i < 1024; i++)
127 *tptr++ = (int) (sin (i * M_PI / 512) * 32767);
129 for (i = 0; i < 256; i++)
130 *tptr++ = *tsinptr++;
134 initOffsTable (GstWarpTV * filter, gint width, gint height)
138 for (y = 0; y < height; y++) {
139 filter->offstable[y] = y * width;
144 initDistTable (GstWarpTV * filter, gint width, gint height)
146 gint32 halfw, halfh, *distptr;
157 distptr = filter->disttable;
159 m = sqrt ((double) (halfw * halfw + halfh * halfh));
161 for (y = -halfh; y < halfh; y++)
162 for (x = -halfw; x < halfw; x++)
164 *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
166 *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
171 gst_warptv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
173 GstWarpTV *warptv = GST_WARPTV (trans);
176 gint32 c, i, x, y, dx, dy, maxx, maxy;
177 gint32 skip, *ctptr, *distptr;
180 GstVideoFrame in_frame, out_frame;
182 gst_video_frame_map (&in_frame, &warptv->info, in, GST_MAP_READ);
183 gst_video_frame_map (&out_frame, &warptv->info, out, GST_MAP_WRITE);
185 src = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
186 dest = GST_VIDEO_FRAME_PLANE_DATA (&out_frame, 0);
188 width = GST_VIDEO_FRAME_WIDTH (&in_frame);
189 height = GST_VIDEO_FRAME_HEIGHT (&in_frame);
191 GST_OBJECT_LOCK (warptv);
192 xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30);
193 yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35);
194 cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50);
195 xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40);
196 yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40);
198 ctptr = warptv->ctable;
199 distptr = warptv->disttable;
200 ctable = warptv->ctable;
202 skip = 0; /* video_width*sizeof(RGB32)/4 - video_width;; */
205 for (x = 0; x < 512; x++) {
206 i = (c >> 3) & 0x3FE;
207 *ctptr++ = ((sintable[i] * yw) >> 15);
208 *ctptr++ = ((sintable[i + 256] * xw) >> 15);
214 for (y = 0; y < height - 1; y++) {
215 for (x = 0; x < width; x++) {
217 dx = ctable[i + 1] + x;
229 *dest++ = src[warptv->offstable[dy] + dx];
234 warptv->tval = (warptv->tval + 1) & 511;
235 GST_OBJECT_UNLOCK (warptv);
237 gst_video_frame_unmap (&in_frame);
238 gst_video_frame_unmap (&out_frame);
244 gst_warptv_start (GstBaseTransform * trans)
246 GstWarpTV *warptv = GST_WARPTV (trans);
254 gst_warptv_finalize (GObject * object)
256 GstWarpTV *warptv = GST_WARPTV (object);
258 g_free (warptv->offstable);
259 warptv->offstable = NULL;
260 g_free (warptv->disttable);
261 warptv->disttable = NULL;
263 G_OBJECT_CLASS (parent_class)->finalize (object);
267 gst_warptv_class_init (GstWarpTVClass * klass)
269 GObjectClass *gobject_class = (GObjectClass *) klass;
270 GstElementClass *gstelement_class = (GstElementClass *) klass;
271 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
273 gobject_class->finalize = gst_warptv_finalize;
275 gst_element_class_set_details_simple (gstelement_class, "WarpTV effect",
276 "Filter/Effect/Video",
277 "WarpTV does realtime goo'ing of the video input",
278 "Sam Lantinga <slouken@devolution.com>");
280 gst_element_class_add_pad_template (gstelement_class,
281 gst_static_pad_template_get (&gst_warptv_sink_template));
282 gst_element_class_add_pad_template (gstelement_class,
283 gst_static_pad_template_get (&gst_warptv_src_template));
285 trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
286 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_warptv_set_caps);
287 trans_class->transform = GST_DEBUG_FUNCPTR (gst_warptv_transform);
293 gst_warptv_init (GstWarpTV * warptv)
295 gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (warptv));
296 gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (warptv));