gstreamer/gst/effectv/gstripple.c

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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-rippletv
* @title: rippletv
*
* RippleTV does ripple mark effect on the video input. The ripple is caused
* by motion or random rain drops.
*
* ## Example launch line
* |[
* gst-launch-1.0 -v videotestsrc ! rippletv ! videoconvert ! autovideosink
* ]| This pipeline shows the effect of rippletv on a test stream.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include <string.h>
#include "gstripple.h"
#include "gsteffectv.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;
}
#define gst_rippletv_parent_class parent_class
G_DEFINE_TYPE (GstRippleTV, gst_rippletv, 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_MAKE ("{ BGRx, RGBx, xBGR, xRGB }"))
);
static GstStaticPadTemplate gst_rippletv_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx, xBGR, 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)
{
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GstVideoInfo *info;
info = &GST_VIDEO_FILTER (filter)->in_info;
image_bgset_y (src, filter->background,
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GST_VIDEO_INFO_WIDTH (info) * GST_VIDEO_INFO_HEIGHT (info));
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, height;
gint *p, *q;
gint x, y, h;
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GstVideoInfo *info;
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info = &GST_VIDEO_FILTER (filter)->in_info;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
if (!filter->bg_is_set)
setBackground (filter, src);
image_bgsubtract_update_y (src, filter->background, filter->diff,
width * height);
p = filter->map1 + filter->map_w + 1;
q = filter->map2 + filter->map_w + 1;
diff += 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
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gst_rippletv_transform_frame (GstVideoFilter * vfilter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
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GstRippleTV *filter = GST_RIPPLETV (vfilter);
guint32 *src, *dest;
gint x, y, i;
gint dx, dy, o_dx;
gint h, v;
gint m_w, m_h, v_w, v_h;
gint *p, *q, *r;
gint8 *vp;
GstClockTime timestamp, stream_time;
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timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
stream_time =
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gst_segment_to_stream_time (&GST_BASE_TRANSFORM (vfilter)->segment,
GST_FORMAT_TIME, timestamp);
GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (GST_OBJECT (filter), stream_time);
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src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
GST_OBJECT_LOCK (filter);
/* impact from the motion or rain drop */
if (filter->mode)
raindrop (filter);
else
motiondetect (filter, src);
m_w = filter->map_w;
m_h = filter->map_h;
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v_w = GST_VIDEO_FRAME_WIDTH (in_frame);
v_h = GST_VIDEO_FRAME_HEIGHT (in_frame);
/* simulate surface wave */
/* 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 + m_w + 1;
q = filter->map2 + m_w + 1;
r = filter->map3 + m_w + 1;
for (y = m_h - 2; y > 0; y--) {
for (x = m_w - 2; x > 0; x--) {
h = *(p - m_w - 1) + *(p - m_w + 1) + *(p + m_w - 1) + *(p + m_w + 1)
+ *(p - m_w) + *(p - 1) + *(p + 1) + *(p + m_w) - (*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 + m_w + 1;
q = filter->map2 + m_w + 1;
for (y = m_h - 2; y > 0; y--) {
for (x = m_w - 2; x > 0; x--) {
h = *(p - m_w) + *(p - 1) + *(p + 1) + *(p + m_w) + (*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 = m_h - 1; y > 0; y--) {
for (x = m_w - 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[m_w]) >> (point - 1)) & 0xff];
p++;
vp += 2;
}
p++;
vp += 2;
}
vp = filter->vtable;
/* draw refracted image. The vector table is stretched. */
for (y = 0; y < v_h; y += 2) {
for (x = 0; x < v_w; x += 2) {
h = (gint) vp[0];
v = (gint) vp[1];
dx = x + h;
dy = y + v;
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dx = CLAMP (dx, 0, (v_w - 2));
dy = CLAMP (dy, 0, (v_h - 2));
dest[0] = src[dy * v_w + dx];
o_dx = dx;
dx = x + 1 + (h + (gint) vp[2]) / 2;
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dx = CLAMP (dx, 0, (v_w - 2));
dest[1] = src[dy * v_w + dx];
dy = y + 1 + (v + (gint) vp[m_w * 2 + 1]) / 2;
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dy = CLAMP (dy, 0, (v_h - 2));
dest[v_w] = src[dy * v_w + o_dx];
dest[v_w + 1] = src[dy * v_w + dx];
dest += 2;
vp += 2;
}
dest += v_w;
vp += 2;
}
GST_OBJECT_UNLOCK (filter);
return GST_FLOW_OK;
}
static gboolean
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gst_rippletv_set_info (GstVideoFilter * vfilter, GstCaps * incaps,
GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
{
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GstRippleTV *filter = GST_RIPPLETV (vfilter);
gint width, height;
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width = GST_VIDEO_INFO_WIDTH (in_info);
height = GST_VIDEO_INFO_HEIGHT (in_info);
GST_OBJECT_LOCK (filter);
filter->map_h = height / 2 + 1;
filter->map_w = width / 2 + 1;
/* we over allocate the buffers, as the render code does not handle clipping
* very well */
g_free (filter->map);
filter->map = g_new0 (gint, (1 + 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;
g_free (filter->vtable);
filter->vtable = g_new0 (gint8, (1 + filter->map_h) * filter->map_w * 2);
g_free (filter->background);
filter->background = g_new0 (gint16, width * (height + 1));
g_free (filter->diff);
filter->diff = g_new0 (guint8, width * (height + 1));
GST_OBJECT_UNLOCK (filter);
return TRUE;
}
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);
g_free (filter->map);
filter->map = NULL;
g_free (filter->vtable);
filter->vtable = NULL;
g_free (filter->background);
filter->background = NULL;
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);
GST_OBJECT_LOCK (filter);
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;
}
GST_OBJECT_UNLOCK (filter);
}
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_class_init (GstRippleTVClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
gobject_class->set_property = gst_rippletv_set_property;
gobject_class->get_property = gst_rippletv_get_property;
gobject_class->finalize = gst_rippletv_finalize;
g_object_class_install_property (gobject_class, PROP_RESET,
g_param_spec_boolean ("reset", "Reset",
"Reset all current ripples", FALSE,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
g_object_class_install_property (gobject_class, PROP_MODE,
g_param_spec_enum ("mode", "Mode",
"Mode", GST_TYPE_RIPPLETV_MODE, DEFAULT_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
gst_element_class_set_static_metadata (gstelement_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_static_pad_template (gstelement_class,
&gst_rippletv_sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rippletv_src_template);
trans_class->start = GST_DEBUG_FUNCPTR (gst_rippletv_start);
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_rippletv_set_info);
vfilter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_rippletv_transform_frame);
setTable ();
}
static void
gst_rippletv_init (GstRippleTV * filter)
{
filter->mode = DEFAULT_MODE;
/* FIXME: remove this when memory corruption after resizes are fixed */
gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SRC_PAD (filter));
gst_pad_use_fixed_caps (GST_BASE_TRANSFORM_SINK_PAD (filter));
}