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 *
39 * WarpTV does realtime goo'ing of the video input.
40 *
41 * <refsect2>
42 * <title>Example launch line</title>
43 * |[
44 * gst-launch-1.0 -v videotestsrc ! warptv ! videoconvert ! autovideosink
45 * ]| This pipeline shows the effect of warptv on a test stream.
46 * </refsect2>
47 */
48
49 #ifdef HAVE_CONFIG_H
50 #include "config.h"
51 #endif
52
53 #include <string.h>
54 #include <math.h>
55
56 #include "gstwarp.h"
57 #include <gst/video/gstvideometa.h>
58 #include <gst/video/gstvideopool.h>
59
60 #ifndef M_PI
61 #define M_PI 3.14159265358979323846
62 #endif
63
64 #define gst_warptv_parent_class parent_class
65 G_DEFINE_TYPE (GstWarpTV, gst_warptv, GST_TYPE_VIDEO_FILTER);
66
67 static void initSinTable ();
68 static void initDistTable (GstWarpTV * filter, gint width, gint height);
69
70 static GstStaticPadTemplate gst_warptv_src_template =
71 GST_STATIC_PAD_TEMPLATE ("src",
72 GST_PAD_SRC,
73 GST_PAD_ALWAYS,
74 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
75 );
76
77 static GstStaticPadTemplate gst_warptv_sink_template =
78 GST_STATIC_PAD_TEMPLATE ("sink",
79 GST_PAD_SINK,
80 GST_PAD_ALWAYS,
81 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
82 );
83
84 static gboolean
gst_warptv_set_info(GstVideoFilter * vfilter,GstCaps * incaps,GstVideoInfo * in_info,GstCaps * outcaps,GstVideoInfo * out_info)85 gst_warptv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
86 GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
87 {
88 GstWarpTV *filter = GST_WARPTV (vfilter);
89 gint width, height;
90
91 width = GST_VIDEO_INFO_WIDTH (in_info);
92 height = GST_VIDEO_INFO_HEIGHT (in_info);
93
94 g_free (filter->disttable);
95 filter->disttable = g_malloc (width * height * sizeof (guint32));
96 initDistTable (filter, width, height);
97
98 return TRUE;
99 }
100
101 static gint32 sintable[1024 + 256];
102
103 static void
initSinTable(void)104 initSinTable (void)
105 {
106 gint32 *tptr, *tsinptr;
107 gint i;
108
109 tsinptr = tptr = sintable;
110
111 for (i = 0; i < 1024; i++)
112 *tptr++ = (int) (sin (i * M_PI / 512) * 32767);
113
114 for (i = 0; i < 256; i++)
115 *tptr++ = *tsinptr++;
116 }
117
118 static void
initDistTable(GstWarpTV * filter,gint width,gint height)119 initDistTable (GstWarpTV * filter, gint width, gint height)
120 {
121 gint32 halfw, halfh, *distptr;
122 gint x, y;
123 float m;
124
125 halfw = width >> 1;
126 halfh = height >> 1;
127
128 distptr = filter->disttable;
129
130 m = sqrt ((double) (halfw * halfw + halfh * halfh));
131
132 for (y = -halfh; y < halfh; y++)
133 for (x = -halfw; x < halfw; x++)
134 #ifdef PS2
135 *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
136 #else
137 *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
138 #endif
139 }
140
141 static GstFlowReturn
gst_warptv_transform_frame(GstVideoFilter * filter,GstVideoFrame * in_frame,GstVideoFrame * out_frame)142 gst_warptv_transform_frame (GstVideoFilter * filter, GstVideoFrame * in_frame,
143 GstVideoFrame * out_frame)
144 {
145 GstWarpTV *warptv = GST_WARPTV (filter);
146 gint width, height;
147 gint xw, yw, cw;
148 gint32 c, i, x, y, dx, dy, maxx, maxy;
149 gint32 *ctptr, *distptr;
150 gint32 *ctable;
151 guint32 *src, *dest;
152 gint sstride, dstride;
153
154 src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
155 dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
156
157 sstride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0);
158 dstride = GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0);
159
160 width = GST_VIDEO_FRAME_WIDTH (in_frame);
161 height = GST_VIDEO_FRAME_HEIGHT (in_frame);
162
163 GST_OBJECT_LOCK (warptv);
164 xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30);
165 yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35);
166 cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50);
167 xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40);
168 yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40);
169
170 ctptr = warptv->ctable;
171 distptr = warptv->disttable;
172 ctable = warptv->ctable;
173
174 c = 0;
175
176 for (x = 0; x < 512; x++) {
177 i = (c >> 3) & 0x3FE;
178 *ctptr++ = ((sintable[i] * yw) >> 15);
179 *ctptr++ = ((sintable[i + 256] * xw) >> 15);
180 c += cw;
181 }
182 maxx = width - 2;
183 maxy = height - 2;
184
185 for (y = 0; y < height - 1; y++) {
186 for (x = 0; x < width; x++) {
187 i = *distptr++;
188 dx = ctable[i + 1] + x;
189 dy = ctable[i] + y;
190
191 if (dx < 0)
192 dx = 0;
193 else if (dx > maxx)
194 dx = maxx;
195
196 if (dy < 0)
197 dy = 0;
198 else if (dy > maxy)
199 dy = maxy;
200
201 dest[x] = src[dy * sstride / 4 + dx];
202 }
203 dest += dstride / 4;
204 }
205
206 warptv->tval = (warptv->tval + 1) & 511;
207 GST_OBJECT_UNLOCK (warptv);
208
209 return GST_FLOW_OK;
210 }
211
212 static gboolean
gst_warptv_start(GstBaseTransform * trans)213 gst_warptv_start (GstBaseTransform * trans)
214 {
215 GstWarpTV *warptv = GST_WARPTV (trans);
216
217 warptv->tval = 0;
218
219 return TRUE;
220 }
221
222 static void
gst_warptv_finalize(GObject * object)223 gst_warptv_finalize (GObject * object)
224 {
225 GstWarpTV *warptv = GST_WARPTV (object);
226
227 g_free (warptv->disttable);
228 warptv->disttable = NULL;
229
230 G_OBJECT_CLASS (parent_class)->finalize (object);
231 }
232
233 static void
gst_warptv_class_init(GstWarpTVClass * klass)234 gst_warptv_class_init (GstWarpTVClass * klass)
235 {
236 GObjectClass *gobject_class = (GObjectClass *) klass;
237 GstElementClass *gstelement_class = (GstElementClass *) klass;
238 GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
239 GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
240
241 gobject_class->finalize = gst_warptv_finalize;
242
243 gst_element_class_set_static_metadata (gstelement_class, "WarpTV effect",
244 "Filter/Effect/Video",
245 "WarpTV does realtime goo'ing of the video input",
246 "Sam Lantinga <slouken@devolution.com>");
247
248 gst_element_class_add_static_pad_template (gstelement_class,
249 &gst_warptv_sink_template);
250 gst_element_class_add_static_pad_template (gstelement_class,
251 &gst_warptv_src_template);
252
253 trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
254
255 vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_warptv_set_info);
256 vfilter_class->transform_frame =
257 GST_DEBUG_FUNCPTR (gst_warptv_transform_frame);
258
259 initSinTable ();
260 }
261
262 static void
gst_warptv_init(GstWarpTV * warptv)263 gst_warptv_init (GstWarpTV * warptv)
264 {
265 /* nothing to do */
266 }
267