mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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324 lines
9.8 KiB
C
324 lines
9.8 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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 "gstvideomedian.h"
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static GstStaticPadTemplate video_median_src_factory =
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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, YV12 }"))
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);
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static GstStaticPadTemplate video_median_sink_factory =
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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, YV12 }"))
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);
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/* Median signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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#define DEFAULT_FILTERSIZE 5
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#define DEFAULT_LUM_ONLY TRUE
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enum
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{
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PROP_0,
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PROP_FILTERSIZE,
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PROP_LUM_ONLY
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};
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#define GST_TYPE_VIDEO_MEDIAN_SIZE (gst_video_median_size_get_type())
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static const GEnumValue video_median_sizes[] = {
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{GST_VIDEO_MEDIAN_SIZE_5, "Median of 5 neighbour pixels", "5"},
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{GST_VIDEO_MEDIAN_SIZE_9, "Median of 9 neighbour pixels", "9"},
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{0, NULL, NULL},
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};
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static GType
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gst_video_median_size_get_type (void)
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{
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static GType video_median_size_type = 0;
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if (!video_median_size_type) {
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video_median_size_type = g_enum_register_static ("GstVideoMedianSize",
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video_median_sizes);
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}
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return video_median_size_type;
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}
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#define gst_video_median_parent_class parent_class
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G_DEFINE_TYPE (GstVideoMedian, gst_video_median, GST_TYPE_VIDEO_FILTER);
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static GstFlowReturn gst_video_median_transform_frame (GstVideoFilter * filter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame);
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static void gst_video_median_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_video_median_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void
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gst_video_median_class_init (GstVideoMedianClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstVideoFilterClass *vfilter_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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vfilter_class = (GstVideoFilterClass *) klass;
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gobject_class->set_property = gst_video_median_set_property;
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gobject_class->get_property = gst_video_median_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTERSIZE,
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g_param_spec_enum ("filtersize", "Filtersize", "The size of the filter",
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GST_TYPE_VIDEO_MEDIAN_SIZE, DEFAULT_FILTERSIZE,
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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_LUM_ONLY,
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g_param_spec_boolean ("lum-only", "Lum Only", "Only apply filter on "
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"luminance", DEFAULT_LUM_ONLY,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&video_median_sink_factory));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&video_median_src_factory));
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gst_element_class_set_static_metadata (gstelement_class, "Median effect",
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"Filter/Effect/Video",
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"Apply a median filter to an image",
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"Wim Taymans <wim.taymans@gmail.com>");
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vfilter_class->transform_frame =
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GST_DEBUG_FUNCPTR (gst_video_median_transform_frame);
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}
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void
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gst_video_median_init (GstVideoMedian * median)
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{
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median->filtersize = DEFAULT_FILTERSIZE;
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median->lum_only = DEFAULT_LUM_ONLY;
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}
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#define PIX_SORT(a,b) { if ((a)>(b)) PIX_SWAP((a),(b)); }
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#define PIX_SWAP(a,b) { unsigned char temp=(a);(a)=(b);(b)=temp; }
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static void
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median_5 (guint8 * dest, gint dstride, const guint8 * src, gint sstride,
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gint width, gint height)
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{
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unsigned char p[5];
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int i, j, k;
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/* copy the top and bottom rows into the result array */
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for (i = 0; i < width; i++) {
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dest[i] = src[i];
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dest[(height - 1) * dstride + i] = src[(height - 1) * sstride + i];
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}
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/* process the interior pixels */
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for (k = 2; k < height; k++) {
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dest += dstride;
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src += sstride;
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dest[0] = src[0];
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for (j = 2, i = 1; j < width; j++, i++) {
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p[0] = src[i - sstride];
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p[1] = src[i - 1];
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p[2] = src[i];
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p[3] = src[i + 1];
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p[4] = src[i + sstride];
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PIX_SORT (p[0], p[1]);
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PIX_SORT (p[3], p[4]);
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PIX_SORT (p[0], p[3]);
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PIX_SORT (p[1], p[4]);
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PIX_SORT (p[1], p[2]);
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PIX_SORT (p[2], p[3]);
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PIX_SORT (p[1], p[2]);
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dest[i] = p[2];
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}
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dest[i] = src[i];
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}
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}
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static void
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median_9 (guint8 * dest, gint dstride, const guint8 * src, gint sstride,
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gint width, gint height)
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{
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unsigned char p[9];
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int i, j, k;
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/*copy the top and bottom rows into the result array */
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for (i = 0; i < width; i++) {
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dest[i] = src[i];
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dest[(height - 1) * dstride + i] = src[(height - 1) * sstride + i];
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}
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/* process the interior pixels */
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for (k = 2; k < height; k++) {
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dest += dstride;
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src += sstride;
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dest[0] = src[0];
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for (j = 2, i = 1; j < width; j++, i++) {
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p[0] = src[i - sstride - 1];
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p[1] = src[i - sstride];
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p[2] = src[i - sstride + 1];
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p[3] = src[i - 1];
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p[4] = src[i];
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p[5] = src[i + 1];
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p[6] = src[i + sstride - 1];
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p[7] = src[i + sstride];
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p[8] = src[i + sstride + 1];
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PIX_SORT (p[1], p[2]);
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PIX_SORT (p[4], p[5]);
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PIX_SORT (p[7], p[8]);
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PIX_SORT (p[0], p[1]);
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PIX_SORT (p[3], p[4]);
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PIX_SORT (p[6], p[7]);
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PIX_SORT (p[1], p[2]);
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PIX_SORT (p[4], p[5]);
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PIX_SORT (p[7], p[8]);
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PIX_SORT (p[0], p[3]);
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PIX_SORT (p[5], p[8]);
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PIX_SORT (p[4], p[7]);
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PIX_SORT (p[3], p[6]);
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PIX_SORT (p[1], p[4]);
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PIX_SORT (p[2], p[5]);
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PIX_SORT (p[4], p[7]);
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PIX_SORT (p[4], p[2]);
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PIX_SORT (p[6], p[4]);
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PIX_SORT (p[4], p[2]);
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dest[i] = p[4];
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}
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dest[i] = src[i];
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}
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}
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static GstFlowReturn
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gst_video_median_transform_frame (GstVideoFilter * filter,
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GstVideoFrame * in_frame, GstVideoFrame * out_frame)
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{
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GstVideoMedian *median = GST_VIDEO_MEDIAN (filter);
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if (median->filtersize == 5) {
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median_5 (GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0),
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GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0),
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GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0),
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GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0),
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GST_VIDEO_FRAME_WIDTH (in_frame), GST_VIDEO_FRAME_HEIGHT (in_frame));
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if (median->lum_only) {
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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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} else {
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median_5 (GST_VIDEO_FRAME_PLANE_DATA (out_frame, 1),
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GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 1),
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GST_VIDEO_FRAME_PLANE_DATA (in_frame, 1),
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GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 1),
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GST_VIDEO_FRAME_WIDTH (in_frame) / 2,
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GST_VIDEO_FRAME_HEIGHT (in_frame) / 2);
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median_5 (GST_VIDEO_FRAME_PLANE_DATA (out_frame, 2),
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GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 2),
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GST_VIDEO_FRAME_PLANE_DATA (in_frame, 2),
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GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 2),
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GST_VIDEO_FRAME_WIDTH (in_frame) / 2,
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GST_VIDEO_FRAME_HEIGHT (in_frame) / 2);
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}
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} else {
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median_9 (GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0),
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GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 0),
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GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0),
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GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 0),
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GST_VIDEO_FRAME_WIDTH (in_frame), GST_VIDEO_FRAME_HEIGHT (in_frame));
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if (median->lum_only) {
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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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} else {
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median_9 (GST_VIDEO_FRAME_PLANE_DATA (out_frame, 1),
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GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 1),
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GST_VIDEO_FRAME_PLANE_DATA (in_frame, 1),
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GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 1),
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GST_VIDEO_FRAME_WIDTH (in_frame) / 2,
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GST_VIDEO_FRAME_HEIGHT (in_frame) / 2);
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median_9 (GST_VIDEO_FRAME_PLANE_DATA (out_frame, 2),
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GST_VIDEO_FRAME_PLANE_STRIDE (out_frame, 2),
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GST_VIDEO_FRAME_PLANE_DATA (in_frame, 2),
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GST_VIDEO_FRAME_PLANE_STRIDE (in_frame, 2),
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GST_VIDEO_FRAME_WIDTH (in_frame) / 2,
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GST_VIDEO_FRAME_HEIGHT (in_frame) / 2);
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}
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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_video_median_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstVideoMedian *median;
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median = GST_VIDEO_MEDIAN (object);
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switch (prop_id) {
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case PROP_FILTERSIZE:
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median->filtersize = g_value_get_enum (value);
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break;
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case PROP_LUM_ONLY:
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median->lum_only = g_value_get_boolean (value);
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break;
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default:
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break;
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}
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}
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static void
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gst_video_median_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstVideoMedian *median;
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median = GST_VIDEO_MEDIAN (object);
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switch (prop_id) {
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case PROP_FILTERSIZE:
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g_value_set_enum (value, median->filtersize);
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break;
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case PROP_LUM_ONLY:
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g_value_set_boolean (value, median->lum_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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