/* GStreamer * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> * * EffecTV: * Copyright (C) 2001 FUKUCHI Kentarou * * EffecTV is free software. * 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 <string.h> #include <gst/gst.h> #include "gsteffectv.h" #define GST_TYPE_EDGETV \ (gst_edgetv_get_type()) #define GST_EDGETV(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_EDGETV,GstEdgeTV)) #define GST_EDGETV_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstEdgeTV)) #define GST_IS_EDGETV(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_EDGETV)) #define GST_IS_EDGETV_CLASS(obj) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_EDGETV)) typedef struct _GstEdgeTV GstEdgeTV; typedef struct _GstEdgeTVClass GstEdgeTVClass; struct _GstEdgeTV { GstElement element; GstPad *sinkpad, *srcpad; gint width, height; gint map_width, map_height; guint32 *map; gint video_width_margin; }; struct _GstEdgeTVClass { GstElementClass parent_class; }; /* elementfactory information */ GstElementDetails gst_edgetv_details = { "EdgeTV", "Filter/Video/Effect", "LGPL", "Aply edge detect on video", VERSION, "Wim Taymans <wim.taymans@chello.be>", "(C) 2001 FUKUCHI Kentarou", }; /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, }; static void gst_edgetv_class_init (GstEdgeTVClass * klass); static void gst_edgetv_init (GstEdgeTV * filter); static void gst_edgetv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_edgetv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_edgetv_chain (GstPad * pad, GstBuffer * buf); static GstElementClass *parent_class = NULL; /*static guint gst_edgetv_signals[LAST_SIGNAL] = { 0 }; */ GType gst_edgetv_get_type (void) { static GType edgetv_type = 0; if (!edgetv_type) { static const GTypeInfo edgetv_info = { sizeof (GstEdgeTVClass), NULL, NULL, (GClassInitFunc) gst_edgetv_class_init, NULL, NULL, sizeof (GstEdgeTV), 0, (GInstanceInitFunc) gst_edgetv_init, }; edgetv_type = g_type_register_static (GST_TYPE_ELEMENT, "GstEdgeTV", &edgetv_info, 0); } return edgetv_type; } static void gst_edgetv_class_init (GstEdgeTVClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); gobject_class->set_property = gst_edgetv_set_property; gobject_class->get_property = gst_edgetv_get_property; } static GstPadLinkReturn gst_edgetv_sinkconnect (GstPad * pad, GstCaps * caps) { GstEdgeTV *filter; filter = GST_EDGETV (gst_pad_get_parent (pad)); if (!GST_CAPS_IS_FIXED (caps)) return GST_PAD_LINK_DELAYED; gst_caps_get_int (caps, "width", &filter->width); gst_caps_get_int (caps, "height", &filter->height); filter->map_width = filter->width / 4; filter->map_height = filter->height / 4; filter->video_width_margin = filter->width - filter->map_width * 4; g_free (filter->map); filter->map = (guint32 *)g_malloc (filter->map_width * filter->map_height * sizeof(guint32) * 2); bzero(filter->map, filter->map_width * filter->map_height * sizeof(guint32) * 2); return gst_pad_try_set_caps (filter->srcpad, gst_caps_ref (caps)); } static void gst_edgetv_init (GstEdgeTV * filter) { filter->sinkpad = gst_pad_new_from_template (gst_effectv_sink_factory (), "sink"); gst_pad_set_chain_function (filter->sinkpad, gst_edgetv_chain); gst_pad_set_link_function (filter->sinkpad, gst_edgetv_sinkconnect); gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); filter->srcpad = gst_pad_new_from_template (gst_effectv_src_factory (), "src"); gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); filter->map = NULL; } static void gst_edgetv_chain (GstPad * pad, GstBuffer * buf) { GstEdgeTV *filter; int x, y; int r, g, b; guint32 *src, *dest; guint32 p, q; guint32 v0, v1, v2, v3; GstBuffer *outbuf; filter = GST_EDGETV (gst_pad_get_parent (pad)); src = (guint32 *) GST_BUFFER_DATA (buf); outbuf = gst_buffer_new (); GST_BUFFER_SIZE (outbuf) = (filter->width * filter->height * 4); dest = (guint32 *) GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf)); GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf); src += filter->width * 4 + 4; dest += filter->width * 4 + 4; for (y = 1; y < filter->map_height - 1; y++) { for (x = 1; x < filter->map_width - 1; x++) { p = *src; q = *(src - 4); /* difference between the current pixel and right neighbor. */ r = ((p & 0xff0000) - (q & 0xff0000)) >> 16; g = ((p & 0xff00) - (q & 0xff00)) >> 8; b = (p & 0xff) - (q & 0xff); r *= r; g *= g; b *= b; r = r >> 5; /* To lack the lower bit for saturated addition, */ g = g >> 5; /* devide the value with 32, instead of 16. It is */ b = b >> 4; /* same as `v2 &= 0xfefeff' */ if (r > 127) r = 127; if (g > 127) g = 127; if (b > 255) b = 255; v2 = (r << 17) | (g << 9) | b; /* difference between the current pixel and upper neighbor. */ q = *(src - filter->width * 4); r = ((p & 0xff0000) - (q & 0xff0000)) >> 16; g = ((p & 0xff00) - (q & 0xff00)) >> 8; b = (p & 0xff) - (q & 0xff); r *= r; g *= g; b *= b; r = r >> 5; g = g >> 5; b = b >> 4; if (r > 127) r = 127; if (g > 127) g = 127; if (b > 255) b = 255; v3 = (r << 17) | (g << 9) | b; v0 = filter->map[(y - 1) * filter->map_width * 2 + x * 2]; v1 = filter->map[y * filter->map_width * 2 + (x - 1) * 2 + 1]; filter->map[y * filter->map_width * 2 + x * 2] = v2; filter->map[y * filter->map_width * 2 + x * 2 + 1] = v3; r = v0 + v1; g = r & 0x01010100; dest[0] = r | (g - (g >> 8)); r = v0 + v3; g = r & 0x01010100; dest[1] = r | (g - (g >> 8)); dest[2] = v3; dest[3] = v3; r = v2 + v1; g = r & 0x01010100; dest[filter->width] = r | (g - (g >> 8)); r = v2 + v3; g = r & 0x01010100; dest[filter->width + 1] = r | (g - (g >> 8)); dest[filter->width + 2] = v3; dest[filter->width + 3] = v3; dest[filter->width * 2] = v2; dest[filter->width * 2 + 1] = v2; dest[filter->width * 3] = v2; dest[filter->width * 3 + 1] = v2; src += 4; dest += 4; } src += filter->width * 3 + 8 + filter->video_width_margin; dest += filter->width * 3 + 8 + filter->video_width_margin; } gst_buffer_unref (buf); gst_pad_push (filter->srcpad, outbuf); } static void gst_edgetv_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstEdgeTV *filter; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_EDGETV (object)); filter = GST_EDGETV (object); switch (prop_id) { default: break; } } static void gst_edgetv_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstEdgeTV *filter; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_EDGETV (object)); filter = GST_EDGETV (object); switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }