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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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288 lines
8.8 KiB
C
288 lines
8.8 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* <2001> Wim Taymans <wim.taymans@chello.be>
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* <2011> Stefan Sauer <ensonic@user.sf.net>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gstsmooth.h"
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#include <gst/video/video.h>
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/* Smooth args */
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enum
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{
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PROP_0,
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PROP_ACTIVE,
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PROP_TOLERANCE,
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PROP_FILTER_SIZE,
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PROP_LUMA_ONLY
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};
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static GstStaticPadTemplate gst_smooth_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 (GST_VIDEO_CAPS_MAKE ("I420")
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)
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);
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static GstStaticPadTemplate gst_smooth_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 (GST_VIDEO_CAPS_MAKE ("I420")
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)
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);
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static gboolean gst_smooth_set_info (GstVideoFilter * filter, GstCaps * incaps,
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GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info);
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static GstFlowReturn gst_smooth_transform_frame (GstVideoFilter * vfilter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame);
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static void gst_smooth_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_smooth_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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G_DEFINE_TYPE (GstSmooth, gst_smooth, GST_TYPE_VIDEO_FILTER);
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GST_ELEMENT_REGISTER_DEFINE (smooth, "smooth", GST_RANK_NONE, GST_TYPE_SMOOTH);
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static void
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gst_smooth_class_init (GstSmoothClass * 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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gobject_class->set_property = gst_smooth_set_property;
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gobject_class->get_property = gst_smooth_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ACTIVE,
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g_param_spec_boolean ("active", "active", "process video", TRUE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOLERANCE,
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g_param_spec_int ("tolerance",
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"tolerance", "contrast tolerance for smoothing", G_MININT,
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G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_SIZE,
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g_param_spec_int ("filter-size", "filter-size", "size of media filter",
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G_MININT, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LUMA_ONLY,
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g_param_spec_boolean ("luma-only", "luma-only", "only filter luma part",
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TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_smooth_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_smooth_src_template);
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gst_element_class_set_static_metadata (gstelement_class, "Smooth effect",
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"Filter/Effect/Video", "Apply a smooth filter to an image",
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"Wim Taymans <wim.taymans@chello.be>");
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_smooth_transform_frame);
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vfilter_class->set_info = GST_DEBUG_FUNCPTR (gst_smooth_set_info);
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}
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static gboolean
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gst_smooth_set_info (GstVideoFilter * filter, GstCaps * incaps,
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GstVideoInfo * in_info, GstCaps * outcaps, GstVideoInfo * out_info)
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{
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GstSmooth *smooth;
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smooth = GST_SMOOTH (filter);
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smooth->width = GST_VIDEO_INFO_WIDTH (in_info);
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smooth->height = GST_VIDEO_INFO_HEIGHT (in_info);
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return TRUE;
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}
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static void
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gst_smooth_init (GstSmooth * smooth)
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{
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smooth->active = TRUE;
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smooth->tolerance = 8;
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smooth->filtersize = 3;
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smooth->luma_only = TRUE;
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}
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static void
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smooth_filter (guchar * dest, guchar * src, gint width, gint height,
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gint stride, gint dstride, gint tolerance, gint filtersize)
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{
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gint refval, aktval, upperval, lowerval, numvalues, sum;
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gint x, y, fx, fy, fy1, fy2, fx1, fx2;
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guchar *srcp = src, *destp = dest;
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fy1 = 0;
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fy2 = MIN (filtersize + 1, height) * stride;
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for (y = 0; y < height; y++) {
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if (y > (filtersize + 1))
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fy1 += stride;
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if (y < height - (filtersize + 1))
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fy2 += stride;
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for (x = 0; x < width; x++) {
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refval = *src;
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upperval = refval + tolerance;
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lowerval = refval - tolerance;
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numvalues = 1;
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sum = refval;
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fx1 = MAX (x - filtersize, 0) + fy1;
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fx2 = MIN (x + filtersize + 1, width) + fy1;
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for (fy = fy1; fy < fy2; fy += stride) {
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for (fx = fx1; fx < fx2; fx++) {
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aktval = srcp[fx];
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if ((lowerval - aktval) * (upperval - aktval) < 0) {
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numvalues++;
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sum += aktval;
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}
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} /*for fx */
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fx1 += stride;
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fx2 += stride;
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} /*for fy */
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src++;
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*dest++ = sum / numvalues;
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}
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src = srcp + stride * y;
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dest = destp + dstride * y;
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}
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}
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static GstFlowReturn
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gst_smooth_transform_frame (GstVideoFilter * vfilter, GstVideoFrame * in_frame,
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GstVideoFrame * out_frame)
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{
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GstSmooth *smooth;
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smooth = GST_SMOOTH (vfilter);
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if (!smooth->active) {
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gst_video_frame_copy (out_frame, in_frame);
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return GST_FLOW_OK;
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}
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smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 0),
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GST_VIDEO_FRAME_COMP_DATA (in_frame, 0),
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GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 0),
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GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 0),
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GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 0),
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GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 0),
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smooth->tolerance, smooth->filtersize);
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if (!smooth->luma_only) {
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smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 1),
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GST_VIDEO_FRAME_COMP_DATA (in_frame, 1),
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GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 1),
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GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 1),
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GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 1),
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GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 1),
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smooth->tolerance, smooth->filtersize);
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smooth_filter (GST_VIDEO_FRAME_COMP_DATA (out_frame, 2),
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GST_VIDEO_FRAME_COMP_DATA (in_frame, 2),
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GST_VIDEO_FRAME_COMP_WIDTH (in_frame, 2),
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GST_VIDEO_FRAME_COMP_HEIGHT (in_frame, 2),
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GST_VIDEO_FRAME_COMP_STRIDE (in_frame, 2),
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GST_VIDEO_FRAME_COMP_STRIDE (out_frame, 2),
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smooth->tolerance, smooth->filtersize);
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} else {
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gst_video_frame_copy_plane (out_frame, in_frame, 1);
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gst_video_frame_copy_plane (out_frame, in_frame, 2);
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}
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return GST_FLOW_OK;
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}
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static void
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gst_smooth_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstSmooth *smooth;
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g_return_if_fail (GST_IS_SMOOTH (object));
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smooth = GST_SMOOTH (object);
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switch (prop_id) {
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case PROP_ACTIVE:
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smooth->active = g_value_get_boolean (value);
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break;
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case PROP_TOLERANCE:
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smooth->tolerance = g_value_get_int (value);
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break;
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case PROP_FILTER_SIZE:
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smooth->filtersize = g_value_get_int (value);
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break;
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case PROP_LUMA_ONLY:
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smooth->luma_only = 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_smooth_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstSmooth *smooth;
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g_return_if_fail (GST_IS_SMOOTH (object));
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smooth = GST_SMOOTH (object);
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switch (prop_id) {
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case PROP_ACTIVE:
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g_value_set_boolean (value, smooth->active);
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break;
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case PROP_TOLERANCE:
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g_value_set_int (value, smooth->tolerance);
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break;
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case PROP_FILTER_SIZE:
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g_value_set_int (value, smooth->filtersize);
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break;
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case PROP_LUMA_ONLY:
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g_value_set_boolean (value, smooth->luma_only);
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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 gboolean
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plugin_init (GstPlugin * plugin)
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{
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return GST_ELEMENT_REGISTER (smooth, plugin);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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smooth,
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"Apply a smooth filter to an image",
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plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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