mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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283 lines
7.1 KiB
C
283 lines
7.1 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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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*
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* WarpTV does realtime goo'ing of the video input.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v videotestsrc ! warptv ! ffmpegcolorspace ! autovideosink
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* ]| This pipeline shows the effect of warptv on a test stream.
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* </refsect2>
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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/video.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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GST_BOILERPLATE (GstWarpTV, gst_warptv, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
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static void initSinTable (GstWarpTV * filter);
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static void initOffsTable (GstWarpTV * filter);
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static void initDistTable (GstWarpTV * filter);
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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_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
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GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_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_RGBx ";" GST_VIDEO_CAPS_xRGB ";"
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GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_xBGR)
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);
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static gboolean
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gst_warptv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstWarpTV *filter = GST_WARPTV (btrans);
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GstStructure *structure;
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gboolean ret = FALSE;
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structure = gst_caps_get_structure (incaps, 0);
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if (gst_structure_get_int (structure, "width", &filter->width) &&
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gst_structure_get_int (structure, "height", &filter->height)) {
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g_free (filter->disttable);
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g_free (filter->offstable);
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filter->offstable = g_malloc (filter->height * sizeof (guint32));
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filter->disttable =
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g_malloc (filter->width * filter->height * sizeof (guint32));
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initSinTable (filter);
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initOffsTable (filter);
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initDistTable (filter);
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ret = TRUE;
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}
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return ret;
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}
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static void
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initSinTable (GstWarpTV * filter)
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{
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gint32 *tptr, *tsinptr;
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double i;
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tsinptr = tptr = filter->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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initOffsTable (GstWarpTV * filter)
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{
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int y;
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for (y = 0; y < filter->height; y++) {
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filter->offstable[y] = y * filter->width;
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}
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}
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static void
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initDistTable (GstWarpTV * filter)
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{
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gint32 halfw, halfh, *distptr;
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#ifdef PS2
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float x, y, m;
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#else
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double x, y, m;
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#endif
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halfw = filter->width >> 1;
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halfh = filter->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 (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
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{
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GstWarpTV *warptv = GST_WARPTV (trans);
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int width = warptv->width;
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int height = warptv->height;
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guint32 *src = (guint32 *) GST_BUFFER_DATA (in);
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guint32 *dest = (guint32 *) GST_BUFFER_DATA (out);
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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 skip, *ctptr, *distptr;
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gint32 *sintable, *ctable;
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GstFlowReturn ret = GST_FLOW_OK;
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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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sintable = warptv->sintable;
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ctable = warptv->ctable;
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skip = 0; /* video_width*sizeof(RGB32)/4 - video_width;; */
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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++ = src[warptv->offstable[dy] + dx];
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}
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dest += skip;
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}
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warptv->tval = (warptv->tval + 1) & 511;
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return ret;
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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->offstable);
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warptv->offstable = NULL;
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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_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details_simple (element_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_pad_template (element_class,
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gst_static_pad_template_get (&gst_warptv_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_warptv_src_template));
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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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GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
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gobject_class->finalize = gst_warptv_finalize;
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trans_class->start = GST_DEBUG_FUNCPTR (gst_warptv_start);
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trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_warptv_set_caps);
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trans_class->transform = GST_DEBUG_FUNCPTR (gst_warptv_transform);
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}
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static void
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gst_warptv_init (GstWarpTV * warptv, GstWarpTVClass * klass)
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{
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}
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