gstreamer/gst/gaudieffects/gstsolarize.c

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/*
* GStreamer
* Copyright (C) 2010 Luis de Bethencourt <luis@debethencourt.com>
*
* Solarize - curve adjustment 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-solarize
*
* Solarize does a smart inverse in a video stream in realtime.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v videotestsrc ! solarize ! ffmpegcolorspace ! autovideosink
* ]| This pipeline shows the effect of solarize on a test stream
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include <math.h>
#include "gstplugin.h"
#include "gstsolarize.h"
#include <gst/video/video.h>
#include <gst/controller/gstcontroller.h>
GST_DEBUG_CATEGORY_STATIC (gst_solarize_debug);
#define GST_CAT_DEFAULT gst_solarize_debug
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define CAPS_STR GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_RGBx
#else
#define CAPS_STR GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_xBGR
#endif
/* Filter signals and args. */
enum
{
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_SILENT
};
/* Initializations */
static gint gate_int (gint value, gint min, gint max);
static void transform (guint32 * src, guint32 * dest, gint video_area);
/* The capabilities of the inputs and outputs. */
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CAPS_STR)
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CAPS_STR)
);
GST_BOILERPLATE (GstSolarize, gst_solarize, GstVideoFilter,
GST_TYPE_VIDEO_FILTER);
static void gst_solarize_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_solarize_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_solarize_set_caps (GstBaseTransform * btrans,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_solarize_transform (GstBaseTransform * btrans,
GstBuffer * in_buf, GstBuffer * out_buf);
/* GObject vmethod implementations */
static void
gst_solarize_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_details_simple (element_class,
"Solarize",
"Filter/Effect/Video",
"Solarize tunable inverse in the video signal.",
"Luis de Bethencourt <luis@debethencourt.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
}
/* Initialize the solarize's class. */
static void
gst_solarize_class_init (GstSolarizeClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
gobject_class->set_property = gst_solarize_set_property;
gobject_class->get_property = gst_solarize_get_property;
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));
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_solarize_set_caps);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_solarize_transform);
}
/* Initialize the new element,
* instantiate pads and add them to element,
* set pad calback functions, and
* initialize instance structure.
*/
static void
gst_solarize_init (GstSolarize * filter, GstSolarizeClass * gclass)
{
filter->silent = FALSE;
}
static void
gst_solarize_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstSolarize *filter = GST_SOLARIZE (object);
switch (prop_id) {
case PROP_SILENT:
filter->silent = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_solarize_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstSolarize *filter = GST_SOLARIZE (object);
switch (prop_id) {
case PROP_SILENT:
g_value_set_boolean (value, filter->silent);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* GstElement vmethod implementations */
/* Handle the link with other elements. */
static gboolean
gst_solarize_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstSolarize *filter = GST_SOLARIZE (btrans);
GstStructure *structure;
gboolean ret = TRUE;
structure = gst_caps_get_structure (incaps, 0);
ret &= gst_structure_get_int (structure, "width", &filter->width);
ret &= gst_structure_get_int (structure, "height", &filter->height);
return ret;
}
/* Actual processing. */
static GstFlowReturn
gst_solarize_transform (GstBaseTransform * btrans,
GstBuffer * in_buf, GstBuffer * out_buf)
{
GstSolarize *filter = GST_SOLARIZE (btrans);
gint video_size;
guint32 *src = (guint32 *) GST_BUFFER_DATA (in_buf);
guint32 *dest = (guint32 *) GST_BUFFER_DATA (out_buf);
video_size = filter->width * filter->height;
transform (src, dest, video_size);
return GST_FLOW_OK;
}
/* Entry point to initialize the plug-in.
* Register the element factories and other features. */
gboolean
gst_solarize_plugin_init (GstPlugin * solarize)
{
/* debug category for fltering log messages */
GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize",
0, "Template solarize");
return gst_element_register (solarize, "solarize", GST_RANK_NONE,
GST_TYPE_SOLARIZE);
}
/*** Now the image processing work.... ***/
/* Keep the values inbounds. */
static gint
gate_int (gint value, gint min, gint max)
{
if (value < min) {
return min;
} else if (value > max) {
return max;
} else {
return value;
}
}
/* Transform processes each frame. */
static void
transform (guint32 * src, guint32 * dest, gint video_area)
{
guint32 in;
guint32 color[3];
gint x, c;
gint threshold = 127;
gint start = 50;
gint end = 185;
gint floor = 0;
gint ceiling = 255;
gint period, up_length, down_length, height_scale, param;
period = end - start;
if (period == 0) {
period = 1;
}
up_length = threshold - start;
if (up_length == 0) {
up_length = 1;
}
down_length = end - threshold;
if (down_length == 0) {
down_length = 1;
}
height_scale = ceiling - floor;
/* Loop through pixels. */
for (x = 0; x < video_area; x++) {
in = *src++;
color[0] = (in >> 16) & 0xff;
color[1] = (in >> 8) & 0xff;
color[2] = (in) & 0xff;
/* Loop through colors. */
for (c = 0; c < 3; c++) {
param = color[c];
param += 256;
param -= start;
param %= period;
if (param < up_length) {
color[c] = param * height_scale;
color[c] /= up_length;
color[c] += floor;
} else {
color[c] = down_length - (param - up_length);
color[c] *= height_scale;
color[c] /= down_length;
color[c] += floor;
}
}
color[0] = gate_int (color[0], 0, 255);
color[1] = gate_int (color[1], 0, 255);
color[2] = gate_int (color[2], 0, 255);
*dest++ = (color[0] << 16) | (color[1] << 8) | color[2];
}
}