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No need to have a gate_int () function duplicating the already existing and established CLAMP () function.
373 lines
11 KiB
C
373 lines
11 KiB
C
/*
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* GStreamer
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* Copyright (C) <2010-2012> Luis de Bethencourt <luis@debethencourt.com>
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*
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* Solarize - curve adjustment video effect.
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* Based on Pete Warden's FreeFrame plugin with the same name.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-solarize
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*
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* Solarize does a smart inverse in a video stream in realtime.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v videotestsrc ! solarize ! videoconvert ! autovideosink
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* ]| This pipeline shows the effect of solarize on a test stream
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gst/gst.h>
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#include <math.h>
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#include "gstplugin.h"
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#include "gstsolarize.h"
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GST_DEBUG_CATEGORY_STATIC (gst_solarize_debug);
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#define GST_CAT_DEFAULT gst_solarize_debug
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ BGRx, RGBx }")
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#else
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#define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xBGR, xRGB }")
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#endif
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/* Filter signals and args. */
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enum
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{
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LAST_SIGNAL
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};
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enum
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{
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PROP_0 = 0,
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PROP_THRESHOLD,
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PROP_START,
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PROP_END,
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PROP_SILENT
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};
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/* Initializations */
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#define DEFAULT_THRESHOLD 127
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#define DEFAULT_START 50
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#define DEFAULT_END 185
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static void transform (guint32 * src, guint32 * dest, gint video_area,
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gint threshold, gint start, gint end);
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/* The capabilities of the inputs and outputs. */
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static GstStaticPadTemplate gst_solarize_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (CAPS_STR)
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);
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static GstStaticPadTemplate gst_solarize_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (CAPS_STR)
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);
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#define gst_solarize_parent_class parent_class
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G_DEFINE_TYPE (GstSolarize, gst_solarize, GST_TYPE_VIDEO_FILTER);
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static void gst_solarize_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_solarize_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_solarize_finalize (GObject * object);
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static GstFlowReturn gst_solarize_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame);
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/* GObject vmethod implementations */
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/* Initialize the solarize's class. */
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static void
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gst_solarize_class_init (GstSolarizeClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass;
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gst_element_class_set_details_simple (gstelement_class,
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"Solarize",
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"Filter/Effect/Video",
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"Solarize tunable inverse in the video signal.",
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"Luis de Bethencourt <luis@debethencourt.com>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_solarize_sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_solarize_src_template));
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gobject_class->set_property = gst_solarize_set_property;
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gobject_class->get_property = gst_solarize_get_property;
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gobject_class->finalize = gst_solarize_finalize;
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g_object_class_install_property (gobject_class, PROP_THRESHOLD,
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g_param_spec_uint ("threshold", "Threshold",
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"Threshold parameter", 0, 256, DEFAULT_THRESHOLD,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (gobject_class, PROP_START,
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g_param_spec_uint ("start", "Start",
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"Start parameter", 0, 256, DEFAULT_START,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (gobject_class, PROP_END,
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g_param_spec_uint ("end", "End",
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"End parameter", 0, 256, DEFAULT_END,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (gobject_class, PROP_SILENT,
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g_param_spec_boolean ("silent", "Silent", "Produce verbose output ?",
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FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_solarize_transform_frame);
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}
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/* Initialize the element,
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* instantiate pads and add them to element,
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* set pad calback functions, and
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* initialize instance structure.
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*/
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static void
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gst_solarize_init (GstSolarize * filter)
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{
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filter->threshold = DEFAULT_THRESHOLD;
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filter->start = DEFAULT_START;
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filter->end = DEFAULT_END;
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filter->silent = FALSE;
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}
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static void
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gst_solarize_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSolarize *filter = GST_SOLARIZE (object);
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switch (prop_id) {
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case PROP_SILENT:
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filter->silent = g_value_get_boolean (value);
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break;
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case PROP_THRESHOLD:
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filter->threshold = g_value_get_uint (value);
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break;
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case PROP_START:
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filter->start = g_value_get_uint (value);
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break;
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case PROP_END:
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filter->end = g_value_get_uint (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_solarize_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstSolarize *filter = GST_SOLARIZE (object);
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GST_OBJECT_LOCK (filter);
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switch (prop_id) {
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case PROP_SILENT:
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g_value_set_boolean (value, filter->silent);
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break;
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case PROP_THRESHOLD:
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g_value_set_uint (value, filter->threshold);
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break;
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case PROP_START:
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g_value_set_uint (value, filter->start);
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break;
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case PROP_END:
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g_value_set_uint (value, filter->end);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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GST_OBJECT_UNLOCK (filter);
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}
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static void
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gst_solarize_finalize (GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/* GstElement vmethod implementations */
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/* Actual processing. */
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static GstFlowReturn
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gst_solarize_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame)
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{
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GstSolarize *filter = GST_SOLARIZE (vfilter);
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gint video_size, threshold, start, end, width, height;
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guint32 *src, *dest;
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GstClockTime timestamp;
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gint64 stream_time;
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src = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
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dest = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
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width = GST_VIDEO_FRAME_WIDTH (in_frame);
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height = GST_VIDEO_FRAME_HEIGHT (in_frame);
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/* GstController: update the properties */
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timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
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stream_time =
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gst_segment_to_stream_time (&GST_BASE_TRANSFORM (filter)->segment,
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GST_FORMAT_TIME, timestamp);
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GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
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GST_TIME_ARGS (timestamp));
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if (GST_CLOCK_TIME_IS_VALID (stream_time))
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gst_object_sync_values (GST_OBJECT (filter), stream_time);
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GST_OBJECT_LOCK (filter);
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threshold = filter->threshold;
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start = filter->start;
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end = filter->end;
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GST_OBJECT_UNLOCK (filter);
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video_size = width * height;
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transform (src, dest, video_size, threshold, start, end);
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return GST_FLOW_OK;
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}
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/* Entry point to initialize the plug-in.
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* Register the element factories and other features. */
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gboolean
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gst_solarize_plugin_init (GstPlugin * solarize)
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{
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/* debug category for fltering log messages */
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GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize",
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0, "Template solarize");
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return gst_element_register (solarize, "solarize", GST_RANK_NONE,
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GST_TYPE_SOLARIZE);
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}
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/*** Now the image processing work.... ***/
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/* Transform processes each frame. */
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static void
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transform (guint32 * src, guint32 * dest, gint video_area,
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gint threshold, gint start, gint end)
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{
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guint32 in;
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guint32 color[3];
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gint x, c;
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gint floor = 0;
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gint ceiling = 255;
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gint period, up_length, down_length, height_scale, param;
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period = end - start;
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if (period == 0) {
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period = 1;
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}
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up_length = threshold - start;
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if (up_length == 0) {
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up_length = 1;
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}
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down_length = end - threshold;
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if (down_length == 0) {
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down_length = 1;
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}
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height_scale = ceiling - floor;
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/* Loop through pixels. */
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for (x = 0; x < video_area; x++) {
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in = *src++;
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color[0] = (in >> 16) & 0xff;
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color[1] = (in >> 8) & 0xff;
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color[2] = (in) & 0xff;
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/* Loop through colors. */
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for (c = 0; c < 3; c++) {
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param = color[c];
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param += 256;
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param -= start;
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param %= period;
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if (param < up_length) {
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color[c] = param * height_scale;
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color[c] /= up_length;
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color[c] += floor;
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} else {
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color[c] = down_length - (param - up_length);
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color[c] *= height_scale;
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color[c] /= down_length;
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color[c] += floor;
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}
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}
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color[0] = CLAMP (color[0], 0, 255);
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color[1] = CLAMP (color[1], 0, 255);
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color[2] = CLAMP (color[2], 0, 255);
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*dest++ = (color[0] << 16) | (color[1] << 8) | color[2];
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}
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}
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