/* GStreamer * Copyright (C) <1999> Erik Walthinsen * <2001> Wim Taymans * <2011> Stefan Sauer * * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstsmooth.h" #include /* Smooth args */ enum { PROP_0, PROP_ACTIVE, PROP_TOLERANCE, PROP_FILTER_SIZE, PROP_LUMA_ONLY }; static GstStaticPadTemplate gst_smooth_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420") ) ); static GstStaticPadTemplate gst_smooth_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420") ) ); static gboolean gst_smooth_set_caps (GstBaseTransform * btrans, GstCaps * incaps, GstCaps * outcaps); static GstFlowReturn gst_smooth_transform (GstBaseTransform * btrans, GstBuffer * inbuf, GstBuffer * outbuf); static void smooth_filter (unsigned char *dest, unsigned char *src, int width, int height, int tolerance, int filtersize); static void gst_smooth_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_smooth_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); GST_BOILERPLATE (GstSmooth, gst_smooth, GstVideoFilter, GST_TYPE_VIDEO_FILTER); static void gst_smooth_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_smooth_sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_smooth_src_template)); gst_element_class_set_details_simple (element_class, "Smooth effect", "Filter/Effect/Video", "Apply a smooth filter to an image", "Wim Taymans "); } static void gst_smooth_class_init (GstSmoothClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; GstBaseTransformClass *btrans_class = (GstBaseTransformClass *) klass; gobject_class->set_property = gst_smooth_set_property; gobject_class->get_property = gst_smooth_get_property; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ACTIVE, g_param_spec_boolean ("active", "active", "process video", TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE, g_param_spec_int ("tolerance", "tolerance", "contrast tolerance for smoothing", G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_SIZE, g_param_spec_int ("filter-size", "filter-size", "size of media filter", G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LUMA_ONLY, g_param_spec_boolean ("luma-only", "luma-only", "only filter luma part", TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); btrans_class->transform = GST_DEBUG_FUNCPTR (gst_smooth_transform); btrans_class->set_caps = GST_DEBUG_FUNCPTR (gst_smooth_set_caps); } static gboolean gst_smooth_set_caps (GstBaseTransform * btrans, GstCaps * incaps, GstCaps * outcaps) { GstSmooth *filter; GstStructure *structure; gboolean ret; filter = GST_SMOOTH (btrans); 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; } static void gst_smooth_init (GstSmooth * smooth, GstSmoothClass * klass) { smooth->active = TRUE; smooth->tolerance = 8; smooth->filtersize = 3; smooth->luma_only = TRUE; } static void smooth_filter (guchar * dest, guchar * src, gint width, gint height, gint tolerance, gint filtersize) { gint refval, aktval, upperval, lowerval, numvalues, sum; gint x, y, fx, fy, fy1, fy2, fx1, fx2; guchar *srcp = src; fy1 = 0; fy2 = MIN (filtersize + 1, height) * width; for (y = 0; y < height; y++) { if (y > (filtersize + 1)) fy1 += width; if (y < height - (filtersize + 1)) fy2 += width; for (x = 0; x < width; x++) { refval = *src; upperval = refval + tolerance; lowerval = refval - tolerance; numvalues = 1; sum = refval; fx1 = MAX (x - filtersize, 0) + fy1; fx2 = MIN (x + filtersize + 1, width) + fy1; for (fy = fy1; fy < fy2; fy += width) { for (fx = fx1; fx < fx2; fx++) { aktval = srcp[fx]; if ((lowerval - aktval) * (upperval - aktval) < 0) { numvalues++; sum += aktval; } } /*for fx */ fx1 += width; fx2 += width; } /*for fy */ src++; *dest++ = sum / numvalues; } } } static GstFlowReturn gst_smooth_transform (GstBaseTransform * btrans, GstBuffer * inbuf, GstBuffer * outbuf) { GstSmooth *smooth; guint8 *idata, *odata; guint size, lumsize, chromsize; smooth = GST_SMOOTH (btrans); idata = GST_BUFFER_DATA (inbuf); odata = GST_BUFFER_DATA (outbuf); size = GST_BUFFER_SIZE (inbuf); if (!smooth->active) { memcpy (odata, idata, size); return GST_FLOW_OK; } GST_DEBUG_OBJECT (smooth, "smooth: have buffer of %d", size); lumsize = smooth->width * smooth->height; chromsize = lumsize / 4; smooth_filter (odata, idata, smooth->width, smooth->height, smooth->tolerance, smooth->filtersize); if (!smooth->luma_only) { smooth_filter (odata + lumsize, idata + lumsize, smooth->width / 2, smooth->height / 2, smooth->tolerance, smooth->filtersize / 2); smooth_filter (odata + lumsize + chromsize, idata + lumsize + chromsize, smooth->width / 2, smooth->height / 2, smooth->tolerance, smooth->filtersize / 2); } else { memcpy (odata + lumsize, idata + lumsize, chromsize * 2); } return GST_FLOW_OK; } static void gst_smooth_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstSmooth *smooth; g_return_if_fail (GST_IS_SMOOTH (object)); smooth = GST_SMOOTH (object); switch (prop_id) { case PROP_ACTIVE: smooth->active = g_value_get_boolean (value); break; case PROP_TOLERANCE: smooth->tolerance = g_value_get_int (value); break; case PROP_FILTER_SIZE: smooth->filtersize = g_value_get_int (value); break; case PROP_LUMA_ONLY: smooth->luma_only = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_smooth_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstSmooth *smooth; g_return_if_fail (GST_IS_SMOOTH (object)); smooth = GST_SMOOTH (object); switch (prop_id) { case PROP_ACTIVE: g_value_set_boolean (value, smooth->active); break; case PROP_TOLERANCE: g_value_set_int (value, smooth->tolerance); break; case PROP_FILTER_SIZE: g_value_set_int (value, smooth->filtersize); break; case PROP_LUMA_ONLY: g_value_set_boolean (value, smooth->luma_only); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "smooth", GST_RANK_NONE, GST_TYPE_SMOOTH); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "smooth", "Apply a smooth filter to an image", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)