gstreamer/gst/gaudieffects/gstdilate.c
Luis de Bethencourt 0b3f5dafa6 gaudieffects: stored value is overwritten
Value from left_luminance is assigned to out_luminance here, but that stored
value is not used before it is overwritten in the next cycle of the loop.
Removing assignation.

CID #1226473
2015-01-12 14:22:47 +00:00

424 lines
12 KiB
C

/*
* GStreamer
* Copyright (C) <2010-2012> Luis de Bethencourt <luis@debethencourt.com>
*
* Dilate - dilated eye video effect.
* Based on Pete Warden's FreeFrame plugin with the same name.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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-dilate
*
* Dilate adjusts the colors of a video stream in realtime.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v videotestsrc ! dilate ! videoconvert ! autovideosink
* ]| This pipeline shows the effect of dilate on a test stream
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include <math.h>
#include "gstplugin.h"
#include "gstdilate.h"
GST_DEBUG_CATEGORY_STATIC (gst_dilate_debug);
#define GST_CAT_DEFAULT gst_dilate_debug
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx }")
#else
#define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xBGR, xRGB }")
#endif
#define gst_dilate_parent_class parent_class
G_DEFINE_TYPE (GstDilate, gst_dilate, GST_TYPE_VIDEO_FILTER);
/* Filter signals and args. */
enum
{
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_ERODE,
PROP_SILENT
};
/* Initializations */
#define DEFAULT_ERODE FALSE
static void transform (guint32 * src, guint32 * dest, gint video_area,
gint width, gint height, gboolean erode);
static inline guint32 get_luminance (guint32 in);
/* The capabilities of the inputs and outputs. */
static GstStaticPadTemplate gst_dilate_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CAPS_STR)
);
static GstStaticPadTemplate gst_dilate_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CAPS_STR)
);
static void gst_dilate_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_dilate_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_dilate_finalize (GObject * object);
static GstFlowReturn gst_dilate_transform_frame (GstVideoFilter * vfilter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame);
/* GObject vmethod implementations */
/* Initialize the dilate's class. */
static void
gst_dilate_class_init (GstDilateClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
gst_element_class_set_static_metadata (gstelement_class,
"Dilate",
"Filter/Effect/Video",
"Dilate copies the brightest pixel around.",
"Luis de Bethencourt <luis@debethencourt.com>");
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_dilate_sink_template));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_dilate_src_template));
gobject_class->set_property = gst_dilate_set_property;
gobject_class->get_property = gst_dilate_get_property;
gobject_class->finalize = gst_dilate_finalize;
g_object_class_install_property (gobject_class, PROP_ERODE,
g_param_spec_boolean ("erode", "Erode", "Erode parameter", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
g_object_class_install_property (gobject_class, PROP_SILENT,
g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
vfilter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_dilate_transform_frame);
}
/* Initialize the element,
* instantiate pads and add them to element,
* set pad calback functions, and
* initialize instance structure.
*/
static void
gst_dilate_init (GstDilate * filter)
{
filter->erode = DEFAULT_ERODE;
filter->silent = FALSE;
}
static void
gst_dilate_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDilate *filter = GST_DILATE (object);
switch (prop_id) {
case PROP_SILENT:
filter->silent = g_value_get_boolean (value);
break;
case PROP_ERODE:
filter->erode = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dilate_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDilate *filter = GST_DILATE (object);
GST_OBJECT_LOCK (filter);
switch (prop_id) {
case PROP_SILENT:
g_value_set_boolean (value, filter->silent);
break;
case PROP_ERODE:
g_value_set_boolean (value, filter->erode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (filter);
}
static void
gst_dilate_finalize (GObject * object)
{
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* GstElement vmethod implementations */
/* Actual processing. */
static GstFlowReturn
gst_dilate_transform_frame (GstVideoFilter * vfilter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
GstDilate *filter = GST_DILATE (vfilter);
gint video_size, width, height;
gboolean erode;
guint32 *src, *dest;
GstClockTime timestamp;
gint64 stream_time;
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);
/* GstController: update the properties */
timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
stream_time =
gst_segment_to_stream_time (&GST_BASE_TRANSFORM (filter)->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);
GST_OBJECT_LOCK (filter);
erode = filter->erode;
GST_OBJECT_UNLOCK (filter);
video_size = width * height;
transform (src, dest, video_size, width, height, erode);
return GST_FLOW_OK;
}
/* Entry point to initialize the plug-in.
* Register the element factories and other features. */
gboolean
gst_dilate_plugin_init (GstPlugin * dilate)
{
/* debug category for fltering log messages */
GST_DEBUG_CATEGORY_INIT (gst_dilate_debug, "dilate", 0, "Template dilate");
return gst_element_register (dilate, "dilate", GST_RANK_NONE,
GST_TYPE_DILATE);
}
/*** Now the image processing work.... ***/
/* Return luminance of the color */
static inline guint32
get_luminance (guint32 in)
{
guint32 red, green, blue, luminance;
red = (in >> 16) & 0xff;
green = (in >> 8) & 0xff;
blue = (in) & 0xff;
luminance = ((90 * red) + (115 * green) + (51 * blue));
return luminance;
}
/* Transform processes each frame. */
static void
transform (guint32 * src, guint32 * dest, gint video_area, gint width,
gint height, gboolean erode)
{
guint32 out_luminance, down_luminance, right_luminance;
guint32 up_luminance, left_luminance;
guint32 *src_end = src + video_area;
guint32 *up;
guint32 *left;
guint32 *down;
guint32 *right;
if (erode) {
while (src != src_end) {
guint32 *src_line_start = src;
guint32 *src_line_end = src + width;
while (src != src_line_end) {
up = src - width;
if (up < src) {
up = src;
}
left = src - 1;
if (left < src_line_start) {
left = src;
}
down = src + width;
if (down >= src_end) {
down = src;
}
right = src + 1;
if (right >= src_line_end) {
right = src;
}
*dest = *src;
out_luminance = get_luminance (*src);
down_luminance = get_luminance (*down);
if (down_luminance < out_luminance) {
*dest = *down;
out_luminance = down_luminance;
}
right_luminance = get_luminance (*right);
if (right_luminance < out_luminance) {
*dest = *right;
out_luminance = right_luminance;
}
up_luminance = get_luminance (*up);
if (up_luminance < out_luminance) {
*dest = *up;
out_luminance = up_luminance;
}
left_luminance = get_luminance (*left);
if (left_luminance < out_luminance) {
*dest = *left;
}
src += 1;
dest += 1;
}
}
} else {
while (src != src_end) {
guint32 *src_line_start = src;
guint32 *src_line_end = src + width;
while (src != src_line_end) {
up = src - width;
if (up < src) {
up = src;
}
left = src - 1;
if (left < src_line_start) {
left = src;
}
down = src + width;
if (down >= src_end) {
down = src;
}
right = src + 1;
if (right >= src_line_end) {
right = src;
}
*dest = *src;
out_luminance = get_luminance (*src);
down_luminance = get_luminance (*down);
if (down_luminance > out_luminance) {
*dest = *down;
out_luminance = down_luminance;
}
right_luminance = get_luminance (*right);
if (right_luminance > out_luminance) {
*dest = *right;
out_luminance = right_luminance;
}
up_luminance = get_luminance (*up);
if (up_luminance > out_luminance) {
*dest = *up;
out_luminance = up_luminance;
}
left_luminance = get_luminance (*left);
if (left_luminance > out_luminance) {
*dest = *left;
}
src += 1;
dest += 1;
}
}
}
}