/* 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 (); 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); GST_OBJECT_LOCK (filter); 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)); initOffsTable (filter); initDistTable (filter); ret = TRUE; } GST_OBJECT_UNLOCK (filter); return ret; } static gint32 sintable[1024 + 256]; static void initSinTable (void) { gint32 *tptr, *tsinptr; gint i; tsinptr = tptr = 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) { gint y; for (y = 0; y < filter->height; y++) { filter->offstable[y] = y * filter->width; } } static void initDistTable (GstWarpTV * filter) { gint32 halfw, halfh, *distptr; gint x, y; #ifdef PS2 float m; #else float 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); gint width, 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 *ctable; GstFlowReturn ret = GST_FLOW_OK; GST_OBJECT_LOCK (warptv); width = warptv->width; height = warptv->height; 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; 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; GST_OBJECT_UNLOCK (warptv); 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); initSinTable (); } static void gst_warptv_init (GstWarpTV * warptv, GstWarpTVClass * klass) { gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (warptv)); gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (warptv)); }