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355 lines
9.9 KiB
C
355 lines
9.9 KiB
C
/*
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* GStreamer
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* Copyright (C) <2010-2015> Luis de Bethencourt <luis@debethencourt.com>
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*
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* Dilate - dilated eye 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-dilate
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* @title: dilate
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*
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* Dilate adjusts the colors of a video stream in realtime.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v videotestsrc ! dilate ! videoconvert ! autovideosink
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* ]| This pipeline shows the effect of dilate on a test stream
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*
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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 "gstdilate.h"
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GST_DEBUG_CATEGORY_STATIC (gst_dilate_debug);
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#define GST_CAT_DEFAULT gst_dilate_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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#define gst_dilate_parent_class parent_class
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G_DEFINE_TYPE (GstDilate, gst_dilate, GST_TYPE_VIDEO_FILTER);
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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,
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PROP_ERODE,
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};
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/* Initializations */
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#define DEFAULT_ERODE FALSE
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static void transform (guint32 * src, guint32 * dest, gint video_area,
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gint width, gint height, gboolean erode);
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static inline guint32 get_luminance (guint32 in);
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/* The capabilities of the inputs and outputs. */
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static GstStaticPadTemplate gst_dilate_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_dilate_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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static void gst_dilate_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_dilate_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_dilate_finalize (GObject * object);
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static GstFlowReturn gst_dilate_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 dilate's class. */
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static void
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gst_dilate_class_init (GstDilateClass * 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_static_metadata (gstelement_class,
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"Dilate",
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"Filter/Effect/Video",
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"Dilate copies the brightest pixel around.",
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"Luis de Bethencourt <luis@debethencourt.com>");
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_dilate_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_dilate_src_template);
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gobject_class->set_property = gst_dilate_set_property;
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gobject_class->get_property = gst_dilate_get_property;
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gobject_class->finalize = gst_dilate_finalize;
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g_object_class_install_property (gobject_class, PROP_ERODE,
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g_param_spec_boolean ("erode", "Erode", "Erode parameter", FALSE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_dilate_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 callback functions, and
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* initialize instance structure.
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*/
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static void
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gst_dilate_init (GstDilate * filter)
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{
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filter->erode = DEFAULT_ERODE;
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}
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static void
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gst_dilate_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstDilate *filter = GST_DILATE (object);
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switch (prop_id) {
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case PROP_ERODE:
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filter->erode = g_value_get_boolean (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_dilate_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstDilate *filter = GST_DILATE (object);
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GST_OBJECT_LOCK (filter);
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switch (prop_id) {
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case PROP_ERODE:
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g_value_set_boolean (value, filter->erode);
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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_dilate_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_dilate_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame)
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{
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GstDilate *filter = GST_DILATE (vfilter);
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gint video_size, width, height;
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gboolean erode;
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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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erode = filter->erode;
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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, width, height, erode);
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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_dilate_plugin_init (GstPlugin * dilate)
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{
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/* debug category for fltering log messages */
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GST_DEBUG_CATEGORY_INIT (gst_dilate_debug, "dilate", 0, "Template dilate");
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return gst_element_register (dilate, "dilate", GST_RANK_NONE,
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GST_TYPE_DILATE);
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}
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/*** Now the image processing work.... ***/
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/* Return luminance of the color */
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static inline guint32
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get_luminance (guint32 in)
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{
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guint32 red, green, blue, luminance;
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red = (in >> 16) & 0xff;
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green = (in >> 8) & 0xff;
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blue = (in) & 0xff;
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luminance = ((90 * red) + (115 * green) + (51 * blue));
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return luminance;
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}
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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, gint width,
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gint height, gboolean erode)
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{
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guint32 out_luminance, down_luminance, right_luminance;
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guint32 up_luminance, left_luminance;
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guint32 *src_end = src + video_area;
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guint32 *up;
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guint32 *left;
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guint32 *down;
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guint32 *right;
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while (src != src_end) {
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guint32 *src_line_start = src;
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guint32 *src_line_end = src + width;
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while (src != src_line_end) {
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up = src - width;
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if (up < src) {
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up = src;
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}
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left = src - 1;
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if (left < src_line_start) {
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left = src;
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}
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down = src + width;
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if (down >= src_end) {
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down = src;
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}
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right = src + 1;
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if (right >= src_line_end) {
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right = src;
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}
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*dest = *src;
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out_luminance = get_luminance (*src);
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down_luminance = get_luminance (*down);
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if ((erode && down_luminance < out_luminance) ||
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(!erode && down_luminance > out_luminance)) {
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*dest = *down;
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out_luminance = down_luminance;
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}
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right_luminance = get_luminance (*right);
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if ((erode && right_luminance < out_luminance) ||
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(!erode && right_luminance > out_luminance)) {
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*dest = *right;
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out_luminance = right_luminance;
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}
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up_luminance = get_luminance (*up);
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if ((erode && up_luminance < out_luminance) ||
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(!erode && up_luminance > out_luminance)) {
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*dest = *up;
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out_luminance = up_luminance;
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}
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left_luminance = get_luminance (*left);
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if ((erode && left_luminance < out_luminance) ||
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(!erode && left_luminance > out_luminance)) {
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*dest = *left;
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}
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src += 1;
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dest += 1;
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}
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}
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}
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