/* 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, 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-1.0 -v videotestsrc ! warptv ! videoconvert ! 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/gstvideometa.h> #include <gst/video/gstvideopool.h> #ifndef M_PI #define M_PI 3.14159265358979323846 #endif #define gst_warptv_parent_class parent_class G_DEFINE_TYPE (GstWarpTV, gst_warptv, GST_TYPE_VIDEO_FILTER); static void initSinTable (); static void initDistTable (GstWarpTV * filter, gint width, gint height); static GstStaticPadTemplate gst_warptv_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }")) ); static GstStaticPadTemplate gst_warptv_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }")) ); static gboolean gst_warptv_set_info (GstVideoFilter * vfilter, GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info) { GstWarpTV *filter = GST_WARPTV (vfilter); gint width, height; width = GST_VIDEO_INFO_WIDTH (in_info); height = GST_VIDEO_INFO_HEIGHT (in_info); g_free (filter->disttable); filter->disttable = g_malloc (width * height * sizeof (guint32)); initDistTable (filter, width, height); return TRUE; } 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 initDistTable (GstWarpTV * filter, gint width, gint height) { gint32 halfw, halfh, *distptr; gint x, y; float m; halfw = width >> 1; halfh = 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_frame (GstVideoFilter * filter, GstVideoFrame * in_frame, GstVideoFrame * out_frame) { GstWarpTV *warptv = GST_WARPTV (filter); gint width, height; gint xw, yw, cw; gint32 c, i, x, y, dx, dy, maxx, maxy; gint32 *ctptr, *distptr; gint32 *ctable; guint32 *src, *dest; gint sstride, dstride; src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0); dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0); sstride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0); dstride = GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0); width = GST_VIDEO_FRAME_WIDTH (in_frame); height = GST_VIDEO_FRAME_HEIGHT (in_frame); GST_OBJECT_LOCK (warptv); 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; 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[x] = src[dy * sstride / 4 + dx]; } dest += dstride / 4; } warptv->tval = (warptv->tval + 1) & 511; GST_OBJECT_UNLOCK (warptv); return GST_FLOW_OK; } 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->disttable); warptv->disttable = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_warptv_class_init (GstWarpTVClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstElementClass *gstelement_class = (GstElementClass *) klass; GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass; gobject_class->finalize = gst_warptv_finalize; gst_element_class_set_static_metadata (gstelement_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 (gstelement_class, gst_static_pad_template_get (&gst_warptv_sink_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_warptv_src_template)); trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start); vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_warptv_set_info); vfilter_class->transform_frame = GST_DEBUG_FUNCPTR (gst_warptv_transform_frame); initSinTable (); } static void gst_warptv_init (GstWarpTV * warptv) { /* nothing to do */ }