gstreamer/gst/effectv/gstwarp.c
2011-07-07 17:29:58 +02:00

297 lines
7.5 KiB
C

/* 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 ! 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"
#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 initOffsTable (GstWarpTV * filter, gint width, gint height);
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_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstWarpTV *filter = GST_WARPTV (btrans);
GstVideoInfo info;
gint width, height;
if (!gst_video_info_from_caps (&info, incaps))
goto invalid_caps;
filter->info = info;
width = GST_VIDEO_INFO_WIDTH (&info);
height = GST_VIDEO_INFO_HEIGHT (&info);
g_free (filter->disttable);
g_free (filter->offstable);
filter->offstable = g_malloc (height * sizeof (guint32));
filter->disttable = g_malloc (width * height * sizeof (guint32));
initOffsTable (filter, width, height);
initDistTable (filter, width, height);
return TRUE;
/* ERRORS */
invalid_caps:
{
GST_DEBUG_OBJECT (filter, "invalid caps received");
return FALSE;
}
}
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 width, gint height)
{
gint y;
for (y = 0; y < height; y++) {
filter->offstable[y] = y * width;
}
}
static void
initDistTable (GstWarpTV * filter, gint width, gint height)
{
gint32 halfw, halfh, *distptr;
gint x, y;
#ifdef PS2
float m;
#else
float m;
#endif
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 (GstBaseTransform * trans, GstBuffer * in, GstBuffer * out)
{
GstWarpTV *warptv = GST_WARPTV (trans);
gint width, height;
gint xw, yw, cw;
gint32 c, i, x, y, dx, dy, maxx, maxy;
gint32 skip, *ctptr, *distptr;
gint32 *ctable;
guint32 *src, *dest;
GstVideoFrame in_frame, out_frame;
gst_video_frame_map (&in_frame, &warptv->info, in, GST_MAP_READ);
gst_video_frame_map (&out_frame, &warptv->info, out, GST_MAP_WRITE);
src = GST_VIDEO_FRAME_PLANE_DATA (&in_frame, 0);
dest = GST_VIDEO_FRAME_PLANE_DATA (&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;
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);
gst_video_frame_unmap (&in_frame);
gst_video_frame_unmap (&out_frame);
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->offstable);
warptv->offstable = NULL;
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;
gobject_class->finalize = gst_warptv_finalize;
gst_element_class_set_details_simple (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);
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)
{
gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (warptv));
gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (warptv));
}