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295 lines
8.7 KiB
C
295 lines
8.7 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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* Exclusion - color exclusion 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-exclusion
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* @title: exclusion
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*
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* Exclusion saturates 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 ! exclusion ! videoconvert ! autovideosink
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* ]| This pipeline shows the effect of exclusion 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 "gstexclusion.h"
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#include <gst/video/video.h>
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GST_DEBUG_CATEGORY_STATIC (gst_exclusion_debug);
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#define GST_CAT_DEFAULT gst_exclusion_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_FACTOR,
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};
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/* Initializations */
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#define DEFAULT_FACTOR 175
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static void transform (guint32 * src, guint32 * dest, gint video_area,
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gint factor);
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/* The capabilities of the inputs and outputs. */
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static GstStaticPadTemplate gst_exclusion_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_exclusion_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_exclusion_parent_class parent_class
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G_DEFINE_TYPE (GstExclusion, gst_exclusion, GST_TYPE_VIDEO_FILTER);
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static void gst_exclusion_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_exclusion_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_exclusion_finalize (GObject * object);
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static GstFlowReturn gst_exclusion_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 exclusion's class. */
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static void
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gst_exclusion_class_init (GstExclusionClass * 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, "Exclusion",
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"Filter/Effect/Video",
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"Exclusion exclodes the colors in the video signal.",
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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_exclusion_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_exclusion_src_template);
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gobject_class->set_property = gst_exclusion_set_property;
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gobject_class->get_property = gst_exclusion_get_property;
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gobject_class->finalize = gst_exclusion_finalize;
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g_object_class_install_property (gobject_class, PROP_FACTOR,
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g_param_spec_uint ("factor", "Factor",
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"Exclusion factor parameter", 1, 175, DEFAULT_FACTOR,
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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_exclusion_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_exclusion_init (GstExclusion * filter)
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{
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filter->factor = DEFAULT_FACTOR;
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}
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static void
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gst_exclusion_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstExclusion *filter = GST_EXCLUSION (object);
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switch (prop_id) {
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case PROP_FACTOR:
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filter->factor = 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_exclusion_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstExclusion *filter = GST_EXCLUSION (object);
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GST_OBJECT_LOCK (filter);
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switch (prop_id) {
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case PROP_FACTOR:
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g_value_set_uint (value, filter->factor);
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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_exclusion_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_exclusion_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame)
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{
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GstExclusion *filter = GST_EXCLUSION (vfilter);
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gint video_size, factor;
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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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/* 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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factor = filter->factor;
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GST_OBJECT_UNLOCK (filter);
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video_size = GST_VIDEO_FRAME_WIDTH (in_frame) *
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GST_VIDEO_FRAME_HEIGHT (in_frame);
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transform (src, dest, video_size, factor);
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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_exclusion_plugin_init (GstPlugin * exclusion)
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{
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/* debug category for fltering log messages */
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GST_DEBUG_CATEGORY_INIT (gst_exclusion_debug, "exclusion",
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0, "Template exclusion");
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return gst_element_register (exclusion, "exclusion", GST_RANK_NONE,
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GST_TYPE_EXCLUSION);
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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, gint factor)
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{
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guint32 in;
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gint x, red, green, blue;
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for (x = 0; x < video_area; x++) {
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in = *src++;
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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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red = factor -
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(((factor - red) * (factor - red) / factor) + ((green * red) / factor));
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green = factor -
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(((factor - green) * (factor - green) / factor) +
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((green * green) / factor));
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blue = factor -
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(((factor - blue) * (factor - blue) / factor) +
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((blue * blue) / factor));
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red = CLAMP (red, 0, 255);
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green = CLAMP (green, 0, 255);
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blue = CLAMP (blue, 0, 255);
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*dest++ = (red << 16) | (green << 8) | blue;
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}
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}
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