Commit 2abd58de authored by Sebastian Dröge's avatar Sebastian Dröge
Browse files

effectv: Add rippletv element

This produces a water ripple effect on the video input,
based on motion or a rain drop algorithm.

Kindly relicensed to LGPL2+ by Kentaro Fukuchi <fukuchi@megaui.net>.

Fixes bug #588695.
parent 43325530
......@@ -3,7 +3,7 @@ plugin_LTLIBRARIES = libgsteffectv.la
libgsteffectv_la_SOURCES = \
gsteffectv.c gstedge.c gstaging.c gstdice.c gstwarp.c \
gstshagadelic.c gstvertigo.c gstrev.c gstquark.c gstop.c \
gstradioac.c gststreak.c
gstradioac.c gststreak.c gstripple.c
libgsteffectv_la_CFLAGS = \
$(GST_PLUGINS_BASE_CFLAGS) \
$(GST_CONTROLLER_CFLAGS) \
......@@ -21,4 +21,4 @@ libgsteffectv_la_LIBTOOLFLAGS = --tag=disable-static
noinst_HEADERS = gsteffectv.h gstaging.h gstdice.h gstedge.h \
gstquark.h gstrev.h gstshagadelic.h gstvertigo.h gstwarp.h gstop.h \
gstradioac.h gststreak.h
gstradioac.h gststreak.h gstripple.h
......@@ -37,6 +37,7 @@
#include "gstop.h"
#include "gstradioac.h"
#include "gststreak.h"
#include "gstripple.h"
struct _elements_entry
{
......@@ -56,6 +57,7 @@ static const struct _elements_entry _elements[] = {
{"optv", gst_optv_get_type},
{"radioactv", gst_radioactv_get_type},
{"streaktv", gst_streaktv_get_type},
{"rippletv", gst_rippletv_get_type},
{NULL, 0},
};
......
/* GStreamer
* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* EffecTV - Realtime Digital Video Effector
* Copyright (C) 2001-2006 FUKUCHI Kentaro
*
* RippleTV - Water ripple effect.
* Copyright (C) 2001-2002 FUKUCHI Kentaro
*
* This combines the RippleTV and BaltanTV effects, which are
* very similar. BaltanTV is used if the feedback property is set
* to TRUE, otherwise RippleTV is used.
*
* EffecTV is free software. 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.
*/
/**
* SECTION:element-rippletv
*
* RippleTV does ripple mark effect on the video input. The ripple is caused
* by motion or random rain drops.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v videotestsrc ! rippletv ! ffmpegcolorspace ! autovideosink
* ]| This pipeline shows the effect of rippletv on a test stream.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "gstripple.h"
#include "gsteffectv.h"
#include <gst/video/video.h>
#define DEFAULT_MODE 0
enum
{
PROP_0,
PROP_RESET,
PROP_MODE
};
static gint sqrtable[256];
#define GST_TYPE_RIPPLETV_MODE (gst_rippletv_mode_get_type())
static GType
gst_rippletv_mode_get_type (void)
{
static GType type = 0;
static const GEnumValue enumvalue[] = {
{0, "Motion Detection", "motion-detection"},
{1, "Rain", "rain"},
{0, NULL, NULL},
};
if (!type) {
type = g_enum_register_static ("GstRippleTVMode", enumvalue);
}
return type;
}
GST_BOILERPLATE (GstRippleTV, gst_rippletv, GstVideoFilter,
GST_TYPE_VIDEO_FILTER);
static GstStaticPadTemplate gst_rippletv_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx ";"
GST_VIDEO_CAPS_xBGR "; " GST_VIDEO_CAPS_xRGB)
);
static GstStaticPadTemplate gst_rippletv_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_RGBx ";"
GST_VIDEO_CAPS_xBGR "; " GST_VIDEO_CAPS_xRGB)
);
static const gint point = 16;
static const gint impact = 2;
static const gint decay = 8;
static const gint loopnum = 2;
static void
setTable (void)
{
gint i;
for (i = 0; i < 128; i++) {
sqrtable[i] = i * i;
}
for (i = 1; i <= 128; i++) {
sqrtable[256 - i] = -i * i;
}
}
static void
image_bgset_y (guint32 * src, gint16 * background, gint video_area)
{
gint i;
gint R, G, B;
guint32 *p;
gint16 *q;
p = src;
q = background;
for (i = 0; i < video_area; i++) {
R = ((*p) & 0xff0000) >> (16 - 1);
G = ((*p) & 0xff00) >> (8 - 2);
B = (*p) & 0xff;
*q = (gint16) (R + G + B);
p++;
q++;
}
}
static gint
setBackground (GstRippleTV * filter, guint32 * src)
{
image_bgset_y (src, filter->background, filter->width * filter->height);
filter->bg_is_set = TRUE;
return 0;
}
static void
image_bgsubtract_update_y (guint32 * src, gint16 * background, guint8 * diff,
gint video_area)
{
gint i;
gint R, G, B;
guint32 *p;
gint16 *q;
guint8 *r;
gint v;
p = src;
q = background;
r = diff;
for (i = 0; i < video_area; i++) {
R = ((*p) & 0xff0000) >> (16 - 1);
G = ((*p) & 0xff00) >> (8 - 2);
B = (*p) & 0xff;
v = (R + G + B) - (gint) (*q);
*q = (gint16) (R + G + B);
*r = ((v + 70 * 7) >> 24) | ((70 * 7 - v) >> 24);
p++;
q++;
r++;
}
}
static void
motiondetect (GstRippleTV * filter, guint32 * src)
{
guint8 *diff = filter->diff;
gint width = filter->width;
gint *p, *q;
gint x, y, h;
if (!filter->bg_is_set)
setBackground (filter, src);
image_bgsubtract_update_y (src, filter->background, filter->diff,
filter->width * filter->height);
p = filter->map1 + filter->map_w + 1;
q = filter->map2 + filter->map_w + 1;
diff += filter->width + 2;
for (y = filter->map_h - 2; y > 0; y--) {
for (x = filter->map_w - 2; x > 0; x--) {
h = (gint) * diff + (gint) * (diff + 1) + (gint) * (diff + width) +
(gint) * (diff + width + 1);
if (h > 0) {
*p = h << (point + impact - 8);
*q = *p;
}
p++;
q++;
diff += 2;
}
diff += width + 2;
p += 2;
q += 2;
}
}
static inline void
drop (gint power, gint * map1, gint * map2, gint map_w, gint map_h)
{
gint x, y;
gint *p, *q;
x = fastrand () % (map_w - 4) + 2;
y = fastrand () % (map_h - 4) + 2;
p = map1 + y * map_w + x;
q = map2 + y * map_w + x;
*p = power;
*q = power;
*(p - map_w) = *(p - 1) = *(p + 1) = *(p + map_w) = power / 2;
*(p - map_w - 1) = *(p - map_w + 1) = *(p + map_w - 1) = *(p + map_w + 1) =
power / 4;
*(q - map_w) = *(q - 1) = *(q + 1) = *(q + map_w) = power / 2;
*(q - map_w - 1) = *(q - map_w + 1) = *(q + map_w - 1) = *(p + map_w + 1) =
power / 4;
}
static void
raindrop (GstRippleTV * filter)
{
gint i;
if (filter->period == 0) {
switch (filter->rain_stat) {
case 0:
filter->period = (fastrand () >> 23) + 100;
filter->drop_prob = 0;
filter->drop_prob_increment = 0x00ffffff / filter->period;
filter->drop_power = (-(fastrand () >> 28) - 2) << point;
filter->drops_per_frame_max = 2 << (fastrand () >> 30); // 2,4,8 or 16
filter->rain_stat = 1;
break;
case 1:
filter->drop_prob = 0x00ffffff;
filter->drops_per_frame = 1;
filter->drop_prob_increment = 1;
filter->period = (filter->drops_per_frame_max - 1) * 16;
filter->rain_stat = 2;
break;
case 2:
filter->period = (fastrand () >> 22) + 1000;
filter->drop_prob_increment = 0;
filter->rain_stat = 3;
break;
case 3:
filter->period = (filter->drops_per_frame_max - 1) * 16;
filter->drop_prob_increment = -1;
filter->rain_stat = 4;
break;
case 4:
filter->period = (fastrand () >> 24) + 60;
filter->drop_prob_increment = -(filter->drop_prob / filter->period);
filter->rain_stat = 5;
break;
case 5:
default:
filter->period = (fastrand () >> 23) + 500;
filter->drop_prob = 0;
filter->rain_stat = 0;
break;
}
}
switch (filter->rain_stat) {
default:
case 0:
break;
case 1:
case 5:
if ((fastrand () >> 8) < filter->drop_prob) {
drop (filter->drop_power, filter->map1, filter->map2, filter->map_w,
filter->map_h);
}
filter->drop_prob += filter->drop_prob_increment;
break;
case 2:
case 3:
case 4:
for (i = filter->drops_per_frame / 16; i > 0; i--) {
drop (filter->drop_power, filter->map1, filter->map2, filter->map_w,
filter->map_h);
}
filter->drops_per_frame += filter->drop_prob_increment;
break;
}
filter->period--;
}
static GstFlowReturn
gst_rippletv_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer * out)
{
GstRippleTV *filter = GST_RIPPLETV (trans);
guint32 *src, *dest;
GstFlowReturn ret = GST_FLOW_OK;
gint x, y, i;
gint dx, dy;
gint h, v;
gint width, height;
gint *p, *q, *r;
gint8 *vp;
src = (guint32 *) GST_BUFFER_DATA (in);
dest = (guint32 *) GST_BUFFER_DATA (out);
/* impact from the motion or rain drop */
if (filter->mode)
raindrop (filter);
else
motiondetect (filter, src);
/* simulate surface wave */
width = filter->map_w;
height = filter->map_h;
/* This function is called only 30 times per second. To increase a speed
* of wave, iterates this loop several times. */
for (i = loopnum; i > 0; i--) {
/* wave simulation */
p = filter->map1 + width + 1;
q = filter->map2 + width + 1;
r = filter->map3 + width + 1;
for (y = height - 2; y > 0; y--) {
for (x = width - 2; x > 0; x--) {
h = *(p - width - 1) + *(p - width + 1) + *(p + width - 1) + *(p +
width + 1)
+ *(p - width) + *(p - 1) + *(p + 1) + *(p + width) - (*p) * 9;
h = h >> 3;
v = *p - *q;
v += h - (v >> decay);
*r = v + *p;
p++;
q++;
r++;
}
p += 2;
q += 2;
r += 2;
}
/* low pass filter */
p = filter->map3 + width + 1;
q = filter->map2 + width + 1;
for (y = height - 2; y > 0; y--) {
for (x = width - 2; x > 0; x--) {
h = *(p - width) + *(p - 1) + *(p + 1) + *(p + width) + (*p) * 60;
*q = h >> 6;
p++;
q++;
}
p += 2;
q += 2;
}
p = filter->map1;
filter->map1 = filter->map2;
filter->map2 = p;
}
vp = filter->vtable;
p = filter->map1;
for (y = height - 1; y > 0; y--) {
for (x = width - 1; x > 0; x--) {
/* difference of the height between two voxel. They are twiced to
* emphasise the wave. */
vp[0] = sqrtable[((p[0] - p[1]) >> (point - 1)) & 0xff];
vp[1] = sqrtable[((p[0] - p[width]) >> (point - 1)) & 0xff];
p++;
vp += 2;
}
p++;
vp += 2;
}
height = filter->height;
width = filter->width;
vp = filter->vtable;
/* draw refracted image. The vector table is stretched. */
for (y = 0; y < height; y += 2) {
for (x = 0; x < width; x += 2) {
h = (gint) vp[0];
v = (gint) vp[1];
dx = x + h;
dy = y + v;
if (dx < 0)
dx = 0;
if (dy < 0)
dy = 0;
if (dx >= width)
dx = width - 1;
if (dy >= height)
dy = height - 1;
dest[0] = src[dy * width + dx];
i = dx;
dx = x + 1 + (h + (gint) vp[2]) / 2;
if (dx < 0)
dx = 0;
if (dx >= width)
dx = width - 1;
dest[1] = src[dy * width + dx];
dy = y + 1 + (v + (gint) vp[filter->map_w * 2 + 1]) / 2;
if (dy < 0)
dy = 0;
if (dy >= height)
dy = height - 1;
dest[width] = src[dy * width + i];
dest[width + 1] = src[dy * width + dx];
dest += 2;
vp += 2;
}
dest += filter->width;
vp += 2;
}
return ret;
}
static gboolean
gst_rippletv_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstRippleTV *filter = GST_RIPPLETV (btrans);
GstStructure *structure;
gboolean ret = FALSE;
structure = gst_caps_get_structure (incaps, 0);
if (gst_structure_get_int (structure, "width", &filter->width) &&
gst_structure_get_int (structure, "height", &filter->height)) {
filter->map_h = filter->height / 2 + 1;
filter->map_w = filter->width / 2 + 1;
if (filter->map)
g_free (filter->map);
filter->map = g_new0 (gint, filter->map_h * filter->map_w * 3);
filter->map1 = filter->map;
filter->map2 = filter->map + filter->map_w * filter->map_h;
filter->map3 = filter->map + filter->map_w * filter->map_h * 2;
if (filter->vtable)
g_free (filter->vtable);
filter->vtable = g_new0 (gint8, filter->map_h * filter->map_w * 2);
if (filter->background)
g_free (filter->background);
filter->background = g_new0 (gint16, filter->width * filter->height);
if (filter->diff)
g_free (filter->diff);
filter->diff = g_new0 (guint8, filter->width * filter->height);
ret = TRUE;
}
return ret;
}
static gboolean
gst_rippletv_start (GstBaseTransform * trans)
{
GstRippleTV *filter = GST_RIPPLETV (trans);
filter->bg_is_set = FALSE;
filter->period = 0;
filter->rain_stat = 0;
filter->drop_prob = 0;
filter->drop_prob_increment = 0;
filter->drops_per_frame_max = 0;
filter->drops_per_frame = 0;
filter->drop_power = 0;
return TRUE;
}
static void
gst_rippletv_finalize (GObject * object)
{
GstRippleTV *filter = GST_RIPPLETV (object);
if (filter->map)
g_free (filter->map);
filter->map = NULL;
if (filter->vtable)
g_free (filter->vtable);
filter->vtable = NULL;
if (filter->background)
g_free (filter->background);
filter->background = NULL;
if (filter->diff)
g_free (filter->diff);
filter->diff = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_rippletv_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRippleTV *filter = GST_RIPPLETV (object);
switch (prop_id) {
case PROP_RESET:{
memset (filter->map, 0,
filter->map_h * filter->map_w * 2 * sizeof (gint));
break;
}
case PROP_MODE:
filter->mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rippletv_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstRippleTV *filter = GST_RIPPLETV (object);
switch (prop_id) {
case PROP_MODE:
g_value_set_enum (value, filter->mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rippletv_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class, "RippleTV effect",
"Filter/Effect/Video",
"RippleTV does ripple mark effect on the video input",
"FUKUCHI, Kentarou <fukuchi@users.sourceforge.net>, "
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rippletv_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rippletv_src_template));
}
static void
gst_rippletv_class_init (GstRippleTVClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass<