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 ! videoconvert ! autovideosink
45 * ]| This pipeline shows the effect of warptv on a test stream.
57 #include <gst/video/gstmetavideo.h>
58 #include <gst/video/gstvideopool.h>
61 #define M_PI 3.14159265358979323846
64 #define gst_warptv_parent_class parent_class
65 G_DEFINE_TYPE (GstWarpTV, gst_warptv, GST_TYPE_VIDEO_FILTER);
67 static void initSinTable ();
68 static void initDistTable (GstWarpTV * filter, gint width, gint height);
70 static GstStaticPadTemplate gst_warptv_src_template =
71 GST_STATIC_PAD_TEMPLATE ("src",
74 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
77 static GstStaticPadTemplate gst_warptv_sink_template =
78 GST_STATIC_PAD_TEMPLATE ("sink",
81 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
85 gst_warptv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
88 GstWarpTV *filter = GST_WARPTV (btrans);
92 if (!gst_video_info_from_caps (&info, incaps))
97 width = GST_VIDEO_INFO_WIDTH (&info);
98 height = GST_VIDEO_INFO_HEIGHT (&info);
100 g_free (filter->disttable);
101 filter->disttable = g_malloc (width * height * sizeof (guint32));
102 initDistTable (filter, width, height);
109 GST_DEBUG_OBJECT (filter, "invalid caps received");
114 static gint32 sintable[1024 + 256];
119 gint32 *tptr, *tsinptr;
122 tsinptr = tptr = sintable;
124 for (i = 0; i < 1024; i++)
125 *tptr++ = (int) (sin (i * M_PI / 512) * 32767);
127 for (i = 0; i < 256; i++)
128 *tptr++ = *tsinptr++;
132 initDistTable (GstWarpTV * filter, gint width, gint height)
134 gint32 halfw, halfh, *distptr;
145 distptr = filter->disttable;
147 m = sqrt ((double) (halfw * halfw + halfh * halfh));
149 for (y = -halfh; y < halfh; y++)
150 for (x = -halfw; x < halfw; x++)
152 *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
154 *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
159 gst_warptv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
161 GstWarpTV *warptv = GST_WARPTV (trans);
164 gint32 c, i, x, y, dx, dy, maxx, maxy;
165 gint32 *ctptr, *distptr;
168 gint sstride, dstride;
169 GstVideoFrame in_frame, out_frame;
171 gst_video_frame_map (&in_frame, &warptv->info, in, GST_MAP_READ);
172 gst_video_frame_map (&out_frame, &warptv->info, out, GST_MAP_WRITE);
174 src = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
175 dest = GST_VIDEO_FRAME_PLANE_DATA (&out_frame, 0);
177 sstride = GST_VIDEO_FRAME_PLANE_STRIDE (&in_frame, 0) / 4;
178 dstride = GST_VIDEO_FRAME_PLANE_STRIDE (&out_frame, 0) / 4;
180 width = GST_VIDEO_FRAME_WIDTH (&in_frame);
181 height = GST_VIDEO_FRAME_HEIGHT (&in_frame);
183 GST_OBJECT_LOCK (warptv);
184 xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30);
185 yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35);
186 cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50);
187 xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40);
188 yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40);
190 ctptr = warptv->ctable;
191 distptr = warptv->disttable;
192 ctable = warptv->ctable;
196 for (x = 0; x < 512; x++) {
197 i = (c >> 3) & 0x3FE;
198 *ctptr++ = ((sintable[i] * yw) >> 15);
199 *ctptr++ = ((sintable[i + 256] * xw) >> 15);
205 for (y = 0; y < height - 1; y++) {
206 for (x = 0; x < width; x++) {
208 dx = ctable[i + 1] + x;
221 dest[x] = src[dy * sstride + dx];
226 warptv->tval = (warptv->tval + 1) & 511;
227 GST_OBJECT_UNLOCK (warptv);
229 gst_video_frame_unmap (&in_frame);
230 gst_video_frame_unmap (&out_frame);
236 gst_warptv_start (GstBaseTransform * trans)
238 GstWarpTV *warptv = GST_WARPTV (trans);
246 gst_wraptv_decide_allocation (GstBaseTransform * trans, GstQuery * query)
248 GstBufferPool *pool = NULL;
249 guint size, min, max, prefix, alignment;
251 gst_query_parse_allocation_params (query, &size, &min, &max, &prefix,
255 GstStructure *config;
257 config = gst_buffer_pool_get_config (pool);
258 gst_buffer_pool_config_add_option (config,
259 GST_BUFFER_POOL_OPTION_META_VIDEO);
260 gst_buffer_pool_set_config (pool, config);
266 gst_warptv_finalize (GObject * object)
268 GstWarpTV *warptv = GST_WARPTV (object);
270 g_free (warptv->disttable);
271 warptv->disttable = NULL;
273 G_OBJECT_CLASS (parent_class)->finalize (object);
277 gst_warptv_class_init (GstWarpTVClass * klass)
279 GObjectClass *gobject_class = (GObjectClass *) klass;
280 GstElementClass *gstelement_class = (GstElementClass *) klass;
281 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
283 gobject_class->finalize = gst_warptv_finalize;
285 gst_element_class_set_details_simple (gstelement_class, "WarpTV effect",
286 "Filter/Effect/Video",
287 "WarpTV does realtime goo'ing of the video input",
288 "Sam Lantinga <slouken@devolution.com>");
290 gst_element_class_add_pad_template (gstelement_class,
291 gst_static_pad_template_get (&gst_warptv_sink_template));
292 gst_element_class_add_pad_template (gstelement_class,
293 gst_static_pad_template_get (&gst_warptv_src_template));
295 trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
296 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_warptv_set_caps);
297 trans_class->decide_allocation =
298 GST_DEBUG_FUNCPTR (gst_wraptv_decide_allocation);
299 trans_class->transform = GST_DEBUG_FUNCPTR (gst_warptv_transform);
305 gst_warptv_init (GstWarpTV * warptv)
307 gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (warptv));
308 gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (warptv));