/* * GStreamer * Copyright (C) <2010-2015> 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-solarize * @title: solarize * * Solarize does a smart inverse in a video stream in realtime. * * ## Example launch line * |[ * gst-launch-1.0 -v videotestsrc ! solarize ! videoconvert ! autovideosink * ]| This pipeline shows the effect of solarize on a test stream * */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <gst/gst.h> #include <math.h> #include "gstsolarize.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_MAKE ("{ BGRx, RGBx }") #else #define CAPS_STR GST_VIDEO_CAPS_MAKE ("{ xBGR, xRGB }") #endif /* Filter signals and args. */ enum { LAST_SIGNAL }; enum { PROP_0 = 0, PROP_THRESHOLD, PROP_START, PROP_END, }; /* Initializations */ #define DEFAULT_THRESHOLD 127 #define DEFAULT_START 50 #define DEFAULT_END 185 static void transform (guint32 * src, guint32 * dest, gint video_area, gint threshold, gint start, gint end); /* The capabilities of the inputs and outputs. */ static GstStaticPadTemplate gst_solarize_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (CAPS_STR) ); static GstStaticPadTemplate gst_solarize_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (CAPS_STR) ); #define gst_solarize_parent_class parent_class G_DEFINE_TYPE (GstSolarize, gst_solarize, GST_TYPE_VIDEO_FILTER); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (solarize, "solarize", GST_RANK_NONE, GST_TYPE_SOLARIZE, GST_DEBUG_CATEGORY_INIT (gst_solarize_debug, "solarize", 0, "Template solarize")); 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 void gst_solarize_finalize (GObject * object); static GstFlowReturn gst_solarize_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame, GstVideoFrame * out_frame); /* GObject vmethod implementations */ /* Initialize the solarize's class. */ static void gst_solarize_class_init (GstSolarizeClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstElementClass *gstelement_class = (GstElementClass *) klass; GstVideoFilterClass *vfilter_class = (GstVideoFilterClass *) klass; gst_element_class_set_static_metadata (gstelement_class, "Solarize", "Filter/Effect/Video", "Solarize tunable inverse in the video signal.", "Luis de Bethencourt <luis@debethencourt.com>"); gst_element_class_add_static_pad_template (gstelement_class, &gst_solarize_sink_template); gst_element_class_add_static_pad_template (gstelement_class, &gst_solarize_src_template); gobject_class->set_property = gst_solarize_set_property; gobject_class->get_property = gst_solarize_get_property; gobject_class->finalize = gst_solarize_finalize; g_object_class_install_property (gobject_class, PROP_THRESHOLD, g_param_spec_uint ("threshold", "Threshold", "Threshold parameter", 0, 256, DEFAULT_THRESHOLD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, PROP_START, g_param_spec_uint ("start", "Start", "Start parameter", 0, 256, DEFAULT_START, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, PROP_END, g_param_spec_uint ("end", "End", "End parameter", 0, 256, DEFAULT_END, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE)); vfilter_class->transform_frame = GST_DEBUG_FUNCPTR (gst_solarize_transform_frame); } /* Initialize the element, * instantiate pads and add them to element, * set pad callback functions, and * initialize instance structure. */ static void gst_solarize_init (GstSolarize * filter) { filter->threshold = DEFAULT_THRESHOLD; filter->start = DEFAULT_START; filter->end = DEFAULT_END; } 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_THRESHOLD: filter->threshold = g_value_get_uint (value); break; case PROP_START: filter->start = g_value_get_uint (value); break; case PROP_END: filter->end = g_value_get_uint (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); GST_OBJECT_LOCK (filter); switch (prop_id) { case PROP_THRESHOLD: g_value_set_uint (value, filter->threshold); break; case PROP_START: g_value_set_uint (value, filter->start); break; case PROP_END: g_value_set_uint (value, filter->end); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (filter); } static void gst_solarize_finalize (GObject * object) { G_OBJECT_CLASS (parent_class)->finalize (object); } /* GstElement vmethod implementations */ /* Actual processing. */ static GstFlowReturn gst_solarize_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame, GstVideoFrame * out_frame) { GstSolarize *filter = GST_SOLARIZE (vfilter); gint video_size, threshold, start, end; 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); /* 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); threshold = filter->threshold; start = filter->start; end = filter->end; GST_OBJECT_UNLOCK (filter); video_size = GST_VIDEO_FRAME_WIDTH (in_frame) * GST_VIDEO_FRAME_HEIGHT (in_frame); transform (src, dest, video_size, threshold, start, end); return GST_FLOW_OK; } /*** Now the image processing work.... ***/ /* Transform processes each frame. */ static void transform (guint32 * src, guint32 * dest, gint video_area, gint threshold, gint start, gint end) { guint32 in; guint32 color[3]; gint period = 1, up_length = 1, down_length = 1; gint x, c; gint param; static const guint ceiling = 255; if (end != start) period = end - start; if (threshold != start) up_length = threshold - start; if (threshold != end) down_length = end - threshold; /* 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 * ceiling; color[c] /= up_length; } else { color[c] = down_length - (param - up_length); color[c] *= ceiling; color[c] /= down_length; } } /* Clamp colors */ for (c = 0; c < 3; c++) { if (G_UNLIKELY (color[c] > 255)) color[c] = 255; } *dest++ = (color[0] << 16) | (color[1] << 8) | color[2]; } }