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
45 #include <gst/video/video.h>
46 #include <gst/video/gstvideofilter.h>
49 #define M_PI 3.14159265358979323846
52 #define GST_TYPE_WARPTV \
53 (gst_warptv_get_type())
54 #define GST_WARPTV(obj) \
55 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WARPTV,GstWarpTV))
56 #define GST_WARPTV_CLASS(klass) \
57 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WARPTV,GstWarpTVClass))
58 #define GST_IS_WARPTV(obj) \
59 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WARPTV))
60 #define GST_IS_WARPTV_CLASS(klass) \
61 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WARPTV))
63 typedef struct _GstWarpTV GstWarpTV;
64 typedef struct _GstWarpTVClass GstWarpTVClass;
68 GstVideoFilter videofilter;
74 gint32 sintable[1024 + 256];
78 struct _GstWarpTVClass
80 GstVideoFilterClass parent_class;
83 GST_BOILERPLATE (GstWarpTV, gst_warptv, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
85 static void initSinTable (GstWarpTV * filter);
86 static void initOffsTable (GstWarpTV * filter);
87 static void initDistTable (GstWarpTV * filter);
89 static GstStaticPadTemplate gst_warptv_src_template =
90 GST_STATIC_PAD_TEMPLATE ("src",
93 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
94 GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR)
97 static GstStaticPadTemplate gst_warptv_sink_template =
98 GST_STATIC_PAD_TEMPLATE ("sink",
101 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
102 GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR)
106 gst_warptv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
109 GstWarpTV *filter = GST_WARPTV (btrans);
110 GstStructure *structure;
111 gboolean ret = FALSE;
113 structure = gst_caps_get_structure (incaps, 0);
115 if (gst_structure_get_int (structure, "width", &filter->width) &&
116 gst_structure_get_int (structure, "height", &filter->height)) {
117 g_free (filter->disttable);
118 g_free (filter->offstable);
120 filter->offstable = g_malloc (filter->height * sizeof (guint32));
122 g_malloc (filter->width * filter->height * sizeof (guint32));
124 initSinTable (filter);
125 initOffsTable (filter);
126 initDistTable (filter);
134 initSinTable (GstWarpTV * filter)
136 gint32 *tptr, *tsinptr;
139 tsinptr = tptr = filter->sintable;
141 for (i = 0; i < 1024; i++)
142 *tptr++ = (int) (sin (i * M_PI / 512) * 32767);
144 for (i = 0; i < 256; i++)
145 *tptr++ = *tsinptr++;
149 initOffsTable (GstWarpTV * filter)
153 for (y = 0; y < filter->height; y++) {
154 filter->offstable[y] = y * filter->width;
159 initDistTable (GstWarpTV * filter)
161 gint32 halfw, halfh, *distptr;
169 halfw = filter->width >> 1;
170 halfh = filter->height >> 1;
172 distptr = filter->disttable;
174 m = sqrt ((double) (halfw * halfw + halfh * halfh));
176 for (y = -halfh; y < halfh; y++)
177 for (x = -halfw; x < halfw; x++)
179 *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
181 *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
186 gst_warptv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
188 GstWarpTV *warptv = GST_WARPTV (trans);
189 int width = warptv->width;
190 int height = warptv->height;
191 guint32 *src = (guint32 *) GST_BUFFER_DATA (in);
192 guint32 *dest = (guint32 *) GST_BUFFER_DATA (out);
194 gint32 c, i, x, y, dx, dy, maxx, maxy;
195 gint32 skip, *ctptr, *distptr;
196 gint32 *sintable, *ctable;
197 GstFlowReturn ret = GST_FLOW_OK;
199 xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30);
200 yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35);
201 cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50);
202 xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40);
203 yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40);
205 ctptr = warptv->ctable;
206 distptr = warptv->disttable;
207 sintable = warptv->sintable;
208 ctable = warptv->ctable;
210 skip = 0; /* video_width*sizeof(RGB32)/4 - video_width;; */
213 for (x = 0; x < 512; x++) {
214 i = (c >> 3) & 0x3FE;
215 *ctptr++ = ((sintable[i] * yw) >> 15);
216 *ctptr++ = ((sintable[i + 256] * xw) >> 15);
222 for (y = 0; y < height - 1; y++) {
223 for (x = 0; x < width; x++) {
225 dx = ctable[i + 1] + x;
237 *dest++ = src[warptv->offstable[dy] + dx];
242 warptv->tval = (warptv->tval + 1) & 511;
248 gst_warptv_start (GstBaseTransform * trans)
250 GstWarpTV *warptv = GST_WARPTV (trans);
258 gst_warptv_finalize (GObject * object)
260 GstWarpTV *warptv = GST_WARPTV (object);
262 g_free (warptv->offstable);
263 warptv->offstable = NULL;
264 g_free (warptv->disttable);
265 warptv->disttable = NULL;
269 gst_warptv_base_init (gpointer g_class)
271 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
273 gst_element_class_set_details_simple (element_class, "WarpTV effect",
274 "Filter/Effect/Video",
275 "WarpTV does realtime goo'ing of the video input",
276 "Sam Lantinga <slouken@devolution.com>");
278 gst_element_class_add_pad_template (element_class,
279 gst_static_pad_template_get (&gst_warptv_sink_template));
280 gst_element_class_add_pad_template (element_class,
281 gst_static_pad_template_get (&gst_warptv_src_template));
285 gst_warptv_class_init (GstWarpTVClass * klass)
287 GObjectClass *gobject_class = (GObjectClass *) klass;
288 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
290 gobject_class->finalize = gst_warptv_finalize;
292 trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
293 trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_warptv_set_caps);
294 trans_class->transform = GST_DEBUG_FUNCPTR (gst_warptv_transform);
298 gst_warptv_init (GstWarpTV * warptv, GstWarpTVClass * klass)