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266 lines
6.7 KiB
C
266 lines
6.7 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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*
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* EffecTV - Realtime Digital Video Effector
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* Copyright (C) 2001 FUKUCHI Kentarou
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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* This file was (probably) generated from gstvideotemplate.c,
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* gstvideotemplate.c,v 1.11 2004/01/07 08:56:45 ds Exp
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*/
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/* From main.c of warp-1.1:
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*
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* Simple DirectMedia Layer demo
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* Realtime picture 'gooing'
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* by sam lantinga slouken@devolution.com
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*/
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/**
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* SECTION:element-warptv
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* @title: warptv
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*
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* WarpTV does realtime goo'ing of the video input.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v videotestsrc ! warptv ! videoconvert ! autovideosink
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* ]| This pipeline shows the effect of warptv on a test stream.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <math.h>
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#include "gstwarp.h"
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#include <gst/video/gstvideometa.h>
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#include <gst/video/gstvideopool.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#define gst_warptv_parent_class parent_class
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G_DEFINE_TYPE (GstWarpTV, gst_warptv, GST_TYPE_VIDEO_FILTER);
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static void initSinTable ();
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static void initDistTable (GstWarpTV * filter, gint width, gint height);
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static GstStaticPadTemplate gst_warptv_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
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);
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static GstStaticPadTemplate gst_warptv_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBx, xRGB, BGRx, xBGR }"))
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);
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static gboolean
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gst_warptv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
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GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
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{
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GstWarpTV *filter = GST_WARPTV (vfilter);
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gint width, height;
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width = GST_VIDEO_INFO_WIDTH (in_info);
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height = GST_VIDEO_INFO_HEIGHT (in_info);
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g_free (filter->disttable);
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filter->disttable = g_malloc (width * height * sizeof (guint32));
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initDistTable (filter, width, height);
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return TRUE;
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}
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static gint32 sintable[1024 + 256];
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static void
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initSinTable (void)
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{
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gint32 *tptr, *tsinptr;
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gint i;
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tsinptr = tptr = sintable;
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for (i = 0; i < 1024; i++)
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*tptr++ = (int) (sin (i * M_PI / 512) * 32767);
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for (i = 0; i < 256; i++)
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*tptr++ = *tsinptr++;
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}
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static void
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initDistTable (GstWarpTV * filter, gint width, gint height)
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{
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gint32 halfw, halfh, *distptr;
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gint x, y;
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float m;
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halfw = width >> 1;
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halfh = height >> 1;
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distptr = filter->disttable;
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m = sqrt ((double) (halfw * halfw + halfh * halfh));
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for (y = -halfh; y < halfh; y++)
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for (x = -halfw; x < halfw; x++)
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#ifdef PS2
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*distptr++ = ((int) ((sqrtf (x * x + y * y) * 511.9999) / m)) << 1;
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#else
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*distptr++ = ((int) ((sqrt (x * x + y * y) * 511.9999) / m)) << 1;
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#endif
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}
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static GstFlowReturn
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gst_warptv_transform_frame (GstVideoFilter * filter, GstVideoFrame * in_frame,
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GstVideoFrame * out_frame)
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{
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GstWarpTV *warptv = GST_WARPTV (filter);
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gint width, height;
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gint xw, yw, cw;
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gint32 c, i, x, y, dx, dy, maxx, maxy;
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gint32 *ctptr, *distptr;
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gint32 *ctable;
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guint32 *src, *dest;
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gint sstride, dstride;
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src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
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dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
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sstride = GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0);
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dstride = GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0);
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width = GST_VIDEO_FRAME_WIDTH (in_frame);
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height = GST_VIDEO_FRAME_HEIGHT (in_frame);
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GST_OBJECT_LOCK (warptv);
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xw = (gint) (sin ((warptv->tval + 100) * M_PI / 128) * 30);
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yw = (gint) (sin ((warptv->tval) * M_PI / 256) * -35);
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cw = (gint) (sin ((warptv->tval - 70) * M_PI / 64) * 50);
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xw += (gint) (sin ((warptv->tval - 10) * M_PI / 512) * 40);
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yw += (gint) (sin ((warptv->tval + 30) * M_PI / 512) * 40);
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ctptr = warptv->ctable;
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distptr = warptv->disttable;
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ctable = warptv->ctable;
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c = 0;
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for (x = 0; x < 512; x++) {
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i = (c >> 3) & 0x3FE;
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*ctptr++ = ((sintable[i] * yw) >> 15);
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*ctptr++ = ((sintable[i + 256] * xw) >> 15);
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c += cw;
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}
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maxx = width - 2;
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maxy = height - 2;
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for (y = 0; y < height - 1; y++) {
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for (x = 0; x < width; x++) {
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i = *distptr++;
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dx = ctable[i + 1] + x;
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dy = ctable[i] + y;
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if (dx < 0)
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dx = 0;
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else if (dx > maxx)
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dx = maxx;
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if (dy < 0)
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dy = 0;
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else if (dy > maxy)
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dy = maxy;
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dest[x] = src[dy * sstride / 4 + dx];
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}
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dest += dstride / 4;
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}
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warptv->tval = (warptv->tval + 1) & 511;
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GST_OBJECT_UNLOCK (warptv);
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return GST_FLOW_OK;
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}
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static gboolean
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gst_warptv_start (GstBaseTransform * trans)
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{
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GstWarpTV *warptv = GST_WARPTV (trans);
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warptv->tval = 0;
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return TRUE;
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}
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static void
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gst_warptv_finalize (GObject * object)
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{
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GstWarpTV *warptv = GST_WARPTV (object);
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g_free (warptv->disttable);
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warptv->disttable = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_warptv_class_init (GstWarpTVClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
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gobject_class->finalize = gst_warptv_finalize;
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gst_element_class_set_static_metadata (gstelement_class, "WarpTV effect",
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"Filter/Effect/Video",
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"WarpTV does realtime goo'ing of the video input",
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"Sam Lantinga <slouken@devolution.com>");
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_warptv_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_warptv_src_template);
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trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_warptv_set_info);
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_warptv_transform_frame);
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initSinTable ();
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}
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static void
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gst_warptv_init (GstWarpTV * warptv)
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{
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/* nothing to do */
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}
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