| /* GStreamer |
| * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
| * Copyright (C) <2003> David Schleef <ds@schleef.org> |
| * |
| * EffecTV - Realtime Digital Video Effector |
| * Copyright (C) 2001 FUKUCHI Kentarou |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * This file was (probably) generated from gstvideotemplate.c, |
| * gstvideotemplate.c,v 1.11 2004/01/07 08:56:45 ds Exp |
| */ |
| |
| /* From main.c of warp-1.1: |
| * |
| * Simple DirectMedia Layer demo |
| * Realtime picture 'gooing' |
| * by sam lantinga slouken@devolution.com |
| */ |
| |
| /** |
| * SECTION:element-warptv |
| * |
| * WarpTV does realtime goo'ing of the video input. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch -v videotestsrc ! warptv ! ffmpegcolorspace ! autovideosink |
| * ]| This pipeline shows the effect of warptv on a test stream. |
| * </refsect2> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| #include <math.h> |
| |
| #include "gstwarp.h" |
| |
| #include <gst/video/video.h> |
| |
| #ifndef M_PI |
| #define M_PI 3.14159265358979323846 |
| #endif |
| |
| GST_BOILERPLATE (GstWarpTV, gst_warptv, GstVideoFilter, GST_TYPE_VIDEO_FILTER); |
| |
| static void initSinTable (GstWarpTV * filter); |
| static void initOffsTable (GstWarpTV * filter); |
| static void initDistTable (GstWarpTV * filter); |
| |
| static GstStaticPadTemplate gst_warptv_src_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";" |
| GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR) |
| ); |
| |
| static GstStaticPadTemplate gst_warptv_sink_template = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx ";" GST_VIDEO_CAPS_xRGB ";" |
| GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR) |
| ); |
| |
| static gboolean |
| gst_warptv_set_caps (GstBaseTransform * btrans, GstCaps * incaps, |
| GstCaps * outcaps) |
| { |
| GstWarpTV *filter = GST_WARPTV (btrans); |
| GstStructure *structure; |
| gboolean ret = FALSE; |
| |
| structure = gst_caps_get_structure (incaps, 0); |
| |
| if (gst_structure_get_int (structure, "width", &filter->width) && |
| gst_structure_get_int (structure, "height", &filter->height)) { |
| g_free (filter->disttable); |
| g_free (filter->offstable); |
| |
| filter->offstable = g_malloc (filter->height * sizeof (guint32)); |
| filter->disttable = |
| g_malloc (filter->width * filter->height * sizeof (guint32)); |
| |
| initSinTable (filter); |
| initOffsTable (filter); |
| initDistTable (filter); |
| ret = TRUE; |
| } |
| |
| return ret; |
| } |
| |
| static void |
| initSinTable (GstWarpTV * filter) |
| { |
| gint32 *tptr, *tsinptr; |
| double i; |
| |
| tsinptr = tptr = filter->sintable; |
| |
| for (i = 0; i < 1024; i++) |
| *tptr++ = (int) (sin (i * M_PI / 512) * 32767); |
| |
| for (i = 0; i < 256; i++) |
| *tptr++ = *tsinptr++; |
| } |
| |
| static void |
| initOffsTable (GstWarpTV * filter) |
| { |
| int y; |
| |
| for (y = 0; y < filter->height; y++) { |
| filter->offstable[y] = y * filter->width; |
| } |
| } |
| |
| static void |
| initDistTable (GstWarpTV * filter) |
| { |
| gint32 halfw, halfh, *distptr; |
| |
| #ifdef PS2 |
| float x, y, m; |
| #else |
| double x, y, m; |
| #endif |
| |
| halfw = filter->width >> 1; |
| halfh = filter->height >> 1; |
| |
| distptr = filter->disttable; |
| |
| m = sqrt ((double) (halfw * halfw + halfh * halfh)); |
| |
| for (y = -halfh; y < halfh; y++) |
| for (x = -halfw; x < halfw; x++) |
| #ifdef PS2 |
| *distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1; |
| #else |
| *distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1; |
| #endif |
| } |
| |
| static GstFlowReturn |
| gst_warptv_transform (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out) |
| { |
| GstWarpTV *warptv = GST_WARPTV (trans); |
| int width = warptv->width; |
| int height = warptv->height; |
| guint32 *src = (guint32 *) GST_BUFFER_DATA (in); |
| guint32 *dest = (guint32 *) GST_BUFFER_DATA (out); |
| gint xw, yw, cw; |
| gint32 c, i, x, y, dx, dy, maxx, maxy; |
| gint32 skip, *ctptr, *distptr; |
| gint32 *sintable, *ctable; |
| GstFlowReturn ret = GST_FLOW_OK; |
| |
| xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30); |
| yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35); |
| cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50); |
| xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40); |
| yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40); |
| |
| ctptr = warptv->ctable; |
| distptr = warptv->disttable; |
| sintable = warptv->sintable; |
| ctable = warptv->ctable; |
| |
| skip = 0; /* video_width*sizeof(RGB32)/4 - video_width;; */ |
| c = 0; |
| |
| for (x = 0; x < 512; x++) { |
| i = (c >> 3) & 0x3FE; |
| *ctptr++ = ((sintable[i] * yw) >> 15); |
| *ctptr++ = ((sintable[i + 256] * xw) >> 15); |
| c += cw; |
| } |
| maxx = width - 2; |
| maxy = height - 2; |
| |
| for (y = 0; y < height - 1; y++) { |
| for (x = 0; x < width; x++) { |
| i = *distptr++; |
| dx = ctable[i + 1] + x; |
| dy = ctable[i] + y; |
| |
| if (dx < 0) |
| dx = 0; |
| else if (dx > maxx) |
| dx = maxx; |
| |
| if (dy < 0) |
| dy = 0; |
| else if (dy > maxy) |
| dy = maxy; |
| *dest++ = src[warptv->offstable[dy] + dx]; |
| } |
| dest += skip; |
| } |
| |
| warptv->tval = (warptv->tval + 1) & 511; |
| |
| return ret; |
| } |
| |
| static gboolean |
| gst_warptv_start (GstBaseTransform * trans) |
| { |
| GstWarpTV *warptv = GST_WARPTV (trans); |
| |
| warptv->tval = 0; |
| |
| return TRUE; |
| } |
| |
| static void |
| gst_warptv_finalize (GObject * object) |
| { |
| GstWarpTV *warptv = GST_WARPTV (object); |
| |
| g_free (warptv->offstable); |
| warptv->offstable = NULL; |
| g_free (warptv->disttable); |
| warptv->disttable = NULL; |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static void |
| gst_warptv_base_init (gpointer g_class) |
| { |
| GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); |
| |
| gst_element_class_set_details_simple (element_class, "WarpTV effect", |
| "Filter/Effect/Video", |
| "WarpTV does realtime goo'ing of the video input", |
| "Sam Lantinga <slouken@devolution.com>"); |
| |
| gst_element_class_add_pad_template (element_class, |
| gst_static_pad_template_get (&gst_warptv_sink_template)); |
| gst_element_class_add_pad_template (element_class, |
| gst_static_pad_template_get (&gst_warptv_src_template)); |
| } |
| |
| static void |
| gst_warptv_class_init (GstWarpTVClass * klass) |
| { |
| GObjectClass *gobject_class = (GObjectClass *) klass; |
| GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; |
| |
| gobject_class->finalize = gst_warptv_finalize; |
| |
| trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start); |
| trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_warptv_set_caps); |
| trans_class->transform = GST_DEBUG_FUNCPTR (gst_warptv_transform); |
| } |
| |
| static void |
| gst_warptv_init (GstWarpTV * warptv, GstWarpTVClass * klass) |
| { |
| } |