1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
4 *
5 * EffecTV - Realtime Digital Video Effector
6 * Copyright (C) 2001 FUKUCHI Kentarou
7 *
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.
12 *
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.
17 *
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., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24 /*
25 * This file was (probably) generated from gstvideotemplate.c,
26 * gstvideotemplate.c,v 1.11 2004/01/07 08:56:45 ds Exp
27 */
28
29 /* From main.c of warp-1.1:
30 *
31 * Simple DirectMedia Layer demo
32 * Realtime picture 'gooing'
33 * by sam lantinga slouken@devolution.com
34 */
35
36 /**
37 * SECTION:element-warptv
38 * @title: warptv
39 *
40 * WarpTV does realtime goo'ing of the video input.
41 *
42 * ## Example launch line
43 * |[
44 * gst-launch-1.0 -v videotestsrc ! warptv ! videoconvert ! autovideosink
45 * ]| This pipeline shows the effect of warptv on a test stream.
46 *
47 */
48
49 #ifdef HAVE_CONFIG_H
50 #include "config.h"
51 #endif
52
53 #include "gsteffectv.h"
54 #include <string.h>
55 #include <math.h>
56
57 #include "gstwarp.h"
58 #include <gst/video/gstvideometa.h>
59 #include <gst/video/gstvideopool.h>
60
61 #ifndef M_PI
62 #define M_PI 3.14159265358979323846
63 #endif
64
65 #define gst_warptv_parent_class parent_class
66 G_DEFINE_TYPE (GstWarpTV, gst_warptv, GST_TYPE_VIDEO_FILTER);
67 GST_ELEMENT_REGISTER_DEFINE (warptv, "warptv", GST_RANK_NONE, GST_TYPE_WARPTV);
68
69 static void initSinTable ();
70 static void initDistTable (GstWarpTV * filter, gint width, gint height);
71
72 static GstStaticPadTemplate gst_warptv_src_template =
73 GST_STATIC_PAD_TEMPLATE ("src",
74 GST_PAD_SRC,
75 GST_PAD_ALWAYS,
76 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
77 );
78
79 static GstStaticPadTemplate gst_warptv_sink_template =
80 GST_STATIC_PAD_TEMPLATE ("sink",
81 GST_PAD_SINK,
82 GST_PAD_ALWAYS,
83 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
84 );
85
86 static gboolean
gst_warptv_set_info(GstVideoFilter * vfilter,GstCaps * incaps,GstVideoInfo * in_info,GstCaps * outcaps,GstVideoInfo * out_info)87 gst_warptv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
88 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
89 {
90 GstWarpTV *filter = GST_WARPTV (vfilter);
91 gint width, height;
92
93 width = GST_VIDEO_INFO_WIDTH (in_info);
94 height = GST_VIDEO_INFO_HEIGHT (in_info);
95
96 g_free (filter->disttable);
97 filter->disttable = g_malloc (width * height * sizeof (guint32));
98 initDistTable (filter, width, height);
99
100 return TRUE;
101 }
102
103 static gint32 sintable[1024 + 256];
104
105 static void
initSinTable(void)106 initSinTable (void)
107 {
108 gint32 *tptr, *tsinptr;
109 gint i;
110
111 tsinptr = tptr = sintable;
112
113 for (i = 0; i < 1024; i++)
114 *tptr++ = (int) (sin (i * M_PI / 512) * 32767);
115
116 for (i = 0; i < 256; i++)
117 *tptr++ = *tsinptr++;
118 }
119
120 static void
initDistTable(GstWarpTV * filter,gint width,gint height)121 initDistTable (GstWarpTV * filter, gint width, gint height)
122 {
123 gint32 halfw, halfh, *distptr;
124 gint x, y;
125 float m;
126
127 halfw = width >> 1;
128 halfh = height >> 1;
129
130 distptr = filter->disttable;
131
132 m = sqrt ((double) (halfw * halfw + halfh * halfh));
133
134 for (y = -halfh; y < halfh; y++)
135 for (x = -halfw; x < halfw; x++)
136 #ifdef PS2
137 *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
138 #else
139 *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
140 #endif
141 }
142
143 static GstFlowReturn
gst_warptv_transform_frame(GstVideoFilter * filter,GstVideoFrame * in_frame,GstVideoFrame * out_frame)144 gst_warptv_transform_frame (GstVideoFilter * filter, GstVideoFrame * in_frame,
145 GstVideoFrame * out_frame)
146 {
147 GstWarpTV *warptv = GST_WARPTV (filter);
148 gint width, height;
149 gint xw, yw, cw;
150 gint32 c, i, x, y, dx, dy, maxx, maxy;
151 gint32 *ctptr, *distptr;
152 gint32 *ctable;
153 guint32 *src, *dest;
154 gint sstride, dstride;
155
156 src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
157 dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
158
159 sstride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0);
160 dstride = GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0);
161
162 width = GST_VIDEO_FRAME_WIDTH (in_frame);
163 height = GST_VIDEO_FRAME_HEIGHT (in_frame);
164
165 GST_OBJECT_LOCK (warptv);
166 xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30);
167 yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35);
168 cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50);
169 xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40);
170 yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40);
171
172 ctptr = warptv->ctable;
173 distptr = warptv->disttable;
174 ctable = warptv->ctable;
175
176 c = 0;
177
178 for (x = 0; x < 512; x++) {
179 i = (c >> 3) & 0x3FE;
180 *ctptr++ = ((sintable[i] * yw) >> 15);
181 *ctptr++ = ((sintable[i + 256] * xw) >> 15);
182 c += cw;
183 }
184 maxx = width - 2;
185 maxy = height - 2;
186
187 for (y = 0; y < height - 1; y++) {
188 for (x = 0; x < width; x++) {
189 i = *distptr++;
190 dx = ctable[i + 1] + x;
191 dy = ctable[i] + y;
192
193 if (dx < 0)
194 dx = 0;
195 else if (dx > maxx)
196 dx = maxx;
197
198 if (dy < 0)
199 dy = 0;
200 else if (dy > maxy)
201 dy = maxy;
202
203 dest[x] = src[dy * sstride / 4 + dx];
204 }
205 dest += dstride / 4;
206 }
207
208 warptv->tval = (warptv->tval + 1) & 511;
209 GST_OBJECT_UNLOCK (warptv);
210
211 return GST_FLOW_OK;
212 }
213
214 static gboolean
gst_warptv_start(GstBaseTransform * trans)215 gst_warptv_start (GstBaseTransform * trans)
216 {
217 GstWarpTV *warptv = GST_WARPTV (trans);
218
219 warptv->tval = 0;
220
221 return TRUE;
222 }
223
224 static void
gst_warptv_finalize(GObject * object)225 gst_warptv_finalize (GObject * object)
226 {
227 GstWarpTV *warptv = GST_WARPTV (object);
228
229 g_free (warptv->disttable);
230 warptv->disttable = NULL;
231
232 G_OBJECT_CLASS (parent_class)->finalize (object);
233 }
234
235 static void
gst_warptv_class_init(GstWarpTVClass * klass)236 gst_warptv_class_init (GstWarpTVClass * klass)
237 {
238 GObjectClass *gobject_class = (GObjectClass *) klass;
239 GstElementClass *gstelement_class = (GstElementClass *) klass;
240 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
241 GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
242
243 gobject_class->finalize = gst_warptv_finalize;
244
245 gst_element_class_set_static_metadata (gstelement_class, "WarpTV effect",
246 "Filter/Effect/Video",
247 "WarpTV does realtime goo'ing of the video input",
248 "Sam Lantinga <slouken@devolution.com>");
249
250 gst_element_class_add_static_pad_template (gstelement_class,
251 &gst_warptv_sink_template);
252 gst_element_class_add_static_pad_template (gstelement_class,
253 &gst_warptv_src_template);
254
255 trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
256
257 vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_warptv_set_info);
258 vfilter_class->transform_frame =
259 GST_DEBUG_FUNCPTR (gst_warptv_transform_frame);
260
261 initSinTable ();
262 }
263
264 static void
gst_warptv_init(GstWarpTV * warptv)265 gst_warptv_init (GstWarpTV * warptv)
266 {
267 /* nothing to do */
268 }
269