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-rw-r--r--gst/smooth/gstsmooth.c362
1 files changed, 362 insertions, 0 deletions
diff --git a/gst/smooth/gstsmooth.c b/gst/smooth/gstsmooth.c
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+++ b/gst/smooth/gstsmooth.c
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+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+#include <string.h>
+#include <gstsmooth.h>
+
+
+static GstElementDetails smooth_details = {
+ "Smooth effect",
+ "Filter/Effect",
+ "apply a smooth filter to an image",
+ VERSION,
+ "Wim Taymans <wim.taymans@chello.be>",
+ "(C) 2000",
+};
+
+
+/* Smooth signals and args */
+enum {
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ ARG_ACTIVE,
+ ARG_TOLERANCE,
+ ARG_FILTERSIZE,
+ ARG_LUM_ONLY
+};
+
+GST_PADTEMPLATE_FACTORY (smooth_src_factory,
+ "src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_CAPS_NEW (
+ "smooth_src",
+ "video/raw",
+ "format", GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+ )
+)
+
+GST_PADTEMPLATE_FACTORY (smooth_sink_factory,
+ "sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_CAPS_NEW (
+ "smooth_src",
+ "video/raw",
+ "format", GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
+ )
+)
+
+static void gst_smooth_class_init (GstSmoothClass *klass);
+static void gst_smooth_init (GstSmooth *smooth);
+
+static void gst_smooth_chain (GstPad *pad, GstBuffer *buf);
+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);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_smooth_signals[LAST_SIGNAL] = { 0 };
+
+static GstPadNegotiateReturn
+smooth_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstSmooth* filter = GST_SMOOTH (gst_pad_get_parent (pad));
+
+ if (*caps==NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ return gst_pad_negotiate_proxy (pad, filter->sinkpad, caps);
+}
+
+static GstPadNegotiateReturn
+smooth_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstSmooth* filter = GST_SMOOTH (gst_pad_get_parent (pad));
+
+ if (*caps==NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ return gst_pad_negotiate_proxy (pad, filter->srcpad, caps);
+}
+
+GType
+gst_smooth_get_type (void)
+{
+ static GType smooth_type = 0;
+
+ if (!smooth_type) {
+ static const GTypeInfo smooth_info = {
+ sizeof(GstSmoothClass), NULL,
+ NULL,
+ (GClassInitFunc)gst_smooth_class_init,
+ NULL,
+ NULL,
+ sizeof(GstSmooth),
+ 0,
+ (GInstanceInitFunc)gst_smooth_init,
+ };
+ smooth_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSmooth", &smooth_info, 0);
+ }
+ return smooth_type;
+}
+
+static void
+gst_smooth_class_init (GstSmoothClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ACTIVE,
+ g_param_spec_boolean("active","active","active",
+ TRUE,G_PARAM_READWRITE)); // CHECKME
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_TOLERANCE,
+ g_param_spec_int("tolerance","tolerance","tolerance",
+ G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FILTERSIZE,
+ g_param_spec_int("filtersize","filtersize","filtersize",
+ G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+
+ gobject_class->set_property = gst_smooth_set_property;
+ gobject_class->get_property = gst_smooth_get_property;
+
+}
+
+static void
+gst_smooth_newcaps (GstPad *pad, GstCaps *caps)
+{
+ GstSmooth *filter;
+
+ filter = GST_SMOOTH (gst_pad_get_parent (pad));
+
+ filter->width = gst_caps_get_int (caps, "width");
+ filter->height = gst_caps_get_int (caps, "height");
+}
+
+static void
+gst_smooth_init (GstSmooth *smooth)
+{
+ smooth->sinkpad = gst_pad_new_from_template (
+ GST_PADTEMPLATE_GET (smooth_sink_factory), "sink");
+ gst_pad_set_negotiate_function (smooth->sinkpad, smooth_negotiate_sink);
+ gst_pad_set_newcaps_function (smooth->sinkpad, gst_smooth_newcaps);
+ gst_pad_set_chain_function (smooth->sinkpad, gst_smooth_chain);
+ gst_element_add_pad (GST_ELEMENT (smooth), smooth->sinkpad);
+
+ smooth->srcpad = gst_pad_new_from_template (
+ GST_PADTEMPLATE_GET (smooth_src_factory), "src");
+ gst_pad_set_negotiate_function (smooth->srcpad, smooth_negotiate_src);
+ gst_element_add_pad (GST_ELEMENT (smooth), smooth->srcpad);
+
+ smooth->active = TRUE;
+ smooth->tolerance = 8;
+ smooth->filtersize = 3;
+ smooth->lum_only = TRUE;
+}
+
+static void
+smooth_filter (unsigned char* dest, unsigned char* src, int width, int height, int tolerance, int filtersize)
+{
+ int refval, aktval, upperval, lowerval, numvalues, sum;
+ int x, y, fx, fy, fy1, fy2, fx1, fx2;
+ unsigned char *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 void
+gst_smooth_chain (GstPad *pad, GstBuffer *buf)
+{
+ GstSmooth *smooth;
+ guchar *data;
+ gulong size;
+ GstBuffer *outbuf;
+ gint lumsize, chromsize;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
+
+ smooth = GST_SMOOTH (GST_OBJECT_PARENT (pad));
+
+ if (!smooth->active) {
+ gst_pad_push(smooth->srcpad,buf);
+ return;
+ }
+
+ data = GST_BUFFER_DATA (buf);
+ size = GST_BUFFER_SIZE (buf);
+
+ GST_DEBUG (0,"smooth: have buffer of %d\n", GST_BUFFER_SIZE (buf));
+
+ outbuf = gst_buffer_new();
+ GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (buf));
+ GST_BUFFER_SIZE (outbuf) = GST_BUFFER_SIZE (buf);
+
+ lumsize = smooth->width*smooth->height;
+ chromsize = lumsize/4;
+
+ smooth_filter (GST_BUFFER_DATA (outbuf), data, smooth->width, smooth->height,
+ smooth->tolerance, smooth->filtersize);
+ if (!smooth->lum_only) {
+ smooth_filter (GST_BUFFER_DATA (outbuf)+lumsize, data+lumsize, smooth->width/2, smooth->height/2,
+ smooth->tolerance, smooth->filtersize/2);
+ smooth_filter (GST_BUFFER_DATA (outbuf)+lumsize+chromsize, data+lumsize+chromsize, smooth->width/2,
+ smooth->height/2, smooth->tolerance, smooth->filtersize/2);
+ }
+ else {
+ memcpy (GST_BUFFER_DATA (outbuf)+lumsize, data+lumsize, chromsize*2);
+ }
+
+ GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+
+ gst_buffer_unref (buf);
+
+ gst_pad_push (smooth->srcpad, outbuf);
+}
+
+static void
+gst_smooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+ GstSmooth *smooth;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_SMOOTH(object));
+ smooth = GST_SMOOTH(object);
+
+ switch (prop_id) {
+ case ARG_ACTIVE:
+ smooth->active = g_value_get_boolean (value);
+ break;
+ case ARG_TOLERANCE:
+ smooth->tolerance = g_value_get_int (value);
+ break;
+ case ARG_FILTERSIZE:
+ smooth->filtersize = g_value_get_int (value);
+ break;
+ case ARG_LUM_ONLY:
+ smooth->lum_only = g_value_get_boolean (value);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+gst_smooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+ GstSmooth *smooth;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_SMOOTH(object));
+ smooth = GST_SMOOTH(object);
+
+ switch (prop_id) {
+ case ARG_ACTIVE:
+ g_value_set_boolean (value, smooth->active);
+ break;
+ case ARG_TOLERANCE:
+ g_value_set_int (value, smooth->tolerance);
+ break;
+ case ARG_FILTERSIZE:
+ g_value_set_int (value, smooth->filtersize);
+ break;
+ case ARG_LUM_ONLY:
+ g_value_set_boolean (value, smooth->lum_only);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ factory = gst_elementfactory_new("smooth",GST_TYPE_SMOOTH,
+ &smooth_details);
+ g_return_val_if_fail(factory != NULL, FALSE);
+
+ gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (smooth_sink_factory));
+ gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (smooth_src_factory));
+
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "smooth",
+ plugin_init
+};
+
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