1 files changed, 272 insertions, 0 deletions

diff --git a/pdp_opencv_edge.c b/pdp_opencv_edge.c
new file mode 100644
index 0000000..d227381
--- /dev/null
+++ b/pdp_opencv_edge.c
@@ -0,0 +1,272 @@
+/*
+ *   Pure Data Packet module.
+ *   Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <limits.h>
+#include <dlfcn.h>
+
+#include "pdp.h"
+
+#ifndef _EiC
+#include "cv.h"
+#endif
+
+
+
+typedef struct pdp_opencv_edge_struct
+{
+    t_object x_obj;
+    t_float x_f;
+
+    t_outlet *x_outlet0;
+    int x_packet0;
+    int x_packet1;
+    int x_dropped;
+    int x_queue_id;
+
+    int x_width;
+    int x_height;
+    int x_size;
+
+    int x_infosok; 
+
+    int edge_thresh;
+    IplImage *image, *cedge, *gray, *edge;
+
+    
+} t_pdp_opencv_edge;
+
+
+void panic(const char *panicstr, ...)
+{
+    post("pdp_opencv_edge :: PANIC!! %s\n", panicstr);
+    exit(1);
+}
+
+static void pdp_opencv_edge_process_rgb(t_pdp_opencv_edge *x)
+{
+    t_pdp     *header = pdp_packet_header(x->x_packet0);
+    short int *data   = (short int *)pdp_packet_data(x->x_packet0);
+    t_pdp     *newheader = pdp_packet_header(x->x_packet1);
+    short int *newdata = (short int *)pdp_packet_data(x->x_packet1); 
+      
+
+    if ((x->x_width != (t_int)header->info.image.width) || 
+        (x->x_height != (t_int)header->info.image.height)) 
+    {
+
+    	post("pdp_opencv_edge :: resizing buffers");
+	
+    	//cv_freeplugins(x);
+
+    	x->x_width = header->info.image.width;
+    	x->x_height = header->info.image.height;
+    	x->x_size = x->x_width*x->x_height;
+    
+    	//Destroy cv_images
+	cvReleaseImage(&x->image);
+    	cvReleaseImage(&x->gray);
+    	cvReleaseImage(&x->edge);
+    	cvReleaseImage(&x->cedge);
+    
+	//create the orig image with new size
+        x->image = cvCreateImage(cvSize(x->x_width,x->x_height), IPL_DEPTH_8U, 3);
+
+    	// Create the output images with new sizes
+    	x->cedge = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 3);
+
+    	x->gray = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 1);
+    	x->edge = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 1);
+    }
+    
+    newheader->info.image.encoding = header->info.image.encoding;
+    newheader->info.image.width = x->x_width;
+    newheader->info.image.height = x->x_height;
+
+    
+    // We make here a copy of the PDP packet in image->imageData ... 
+    // take a look on the IplImage data structure
+    // http://www.cs.iit.edu/~agam/cs512/lect-notes/opencv-intro/opencv-intro.html 
+    memcpy( x->image->imageData, data, x->x_size*3 );
+    
+    // Convert to grayscale
+    cvCvtColor(x->image, x->gray, CV_BGR2GRAY);
+  
+    cvSmooth( x->gray, x->edge, CV_BLUR, 3, 3, 0, 0 );
+    cvNot( x->gray, x->edge );
+
+    // Run the edge detector on grayscale
+    cvCanny(x->gray, x->edge, (float)x->edge_thresh, (float)x->edge_thresh*3, 3);
+  
+    cvZero( x->cedge );
+    
+    // copy edge points
+    cvCopy( x->image, x->cedge, x->edge );
+
+    //memory copy again, now from x->cedge->imageData to the new data pdp packet
+    memcpy( newdata, x->cedge->imageData, x->x_size*3 );
+
+ 
+    return;
+}
+
+static void pdp_opencv_edge_thresh(t_pdp_opencv_edge *x, t_floatarg f)
+{
+	x->edge_thresh = (int)f;
+}
+
+static void pdp_opencv_edge_sendpacket(t_pdp_opencv_edge *x)
+{
+    /* release the packet */
+    pdp_packet_mark_unused(x->x_packet0);
+    x->x_packet0 = -1;
+
+    /* unregister and propagate if valid dest packet */
+    pdp_packet_pass_if_valid(x->x_outlet0, &x->x_packet1);
+}
+
+static void pdp_opencv_edge_process(t_pdp_opencv_edge *x)
+{
+   int encoding;
+   t_pdp *header = 0;
+   char *parname;
+   unsigned pi;
+   int partype;
+   float pardefault;
+   t_atom plist[2];
+   t_atom tlist[2];
+   t_atom vlist[2];
+
+   /* check if image data packets are compatible */
+   if ( (header = pdp_packet_header(x->x_packet0))
+	&& (PDP_BITMAP == header->type)){
+    
+	/* pdp_opencv_edge_process inputs and write into active inlet */
+	switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
+
+	case PDP_BITMAP_RGB:
+            x->x_packet1 = pdp_packet_clone_rw(x->x_packet0);
+            pdp_queue_add(x, pdp_opencv_edge_process_rgb, pdp_opencv_edge_sendpacket, &x->x_queue_id);
+	    break;
+
+	default:
+	    /* don't know the type, so dont pdp_opencv_edge_process */
+	    break;
+	    
+	}
+    }
+
+}
+
+static void pdp_opencv_edge_input_0(t_pdp_opencv_edge *x, t_symbol *s, t_floatarg f)
+{
+    /* if this is a register_ro message or register_rw message, register with packet factory */
+
+    if (s == gensym("register_rw")) 
+       x->x_dropped = pdp_packet_convert_ro_or_drop(&x->x_packet0, (int)f, pdp_gensym("bitmap/rgb/*") );
+
+    if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped))
+    {
+        /* add the process method and callback to the process queue */
+        pdp_opencv_edge_process(x);
+    }
+}
+
+static void pdp_opencv_edge_free(t_pdp_opencv_edge *x)
+{
+  int i;
+
+    pdp_queue_finish(x->x_queue_id);
+    pdp_packet_mark_unused(x->x_packet0);
+    //cv_freeplugins(x);
+    
+    	//Destroy cv_images
+	cvReleaseImage(&x->image);
+    	cvReleaseImage(&x->gray);
+    	cvReleaseImage(&x->edge);
+    	cvReleaseImage(&x->cedge);
+}
+
+t_class *pdp_opencv_edge_class;
+
+
+void *pdp_opencv_edge_new(t_floatarg f)
+{
+    int i;
+
+    t_pdp_opencv_edge *x = (t_pdp_opencv_edge *)pd_new(pdp_opencv_edge_class);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("edge_thresh"));
+
+    x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); 
+
+    x->x_packet0 = -1;
+    x->x_packet1 = -1;
+    x->x_queue_id = -1;
+
+    x->x_width  = 320;
+    x->x_height = 240;
+    x->x_size   = x->x_width * x->x_height;
+
+    x->x_infosok = 0;
+    x->edge_thresh = 1;
+    
+
+
+
+    x->image = cvCreateImage(cvSize(x->x_width,x->x_height), IPL_DEPTH_8U, 3);
+
+
+// Create the output image
+    x->cedge = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 3);
+
+    // Convert to grayscale
+    x->gray = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 1);
+    x->edge = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 1);
+    cvCvtColor(x->image, x->gray, CV_BGR2GRAY);
+
+    return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_opencv_edge_setup(void)
+{
+
+    post( "		pdp_opencv_edge");
+    pdp_opencv_edge_class = class_new(gensym("pdp_opencv_edge"), (t_newmethod)pdp_opencv_edge_new,
+    	(t_method)pdp_opencv_edge_free, sizeof(t_pdp_opencv_edge), 0, A_DEFFLOAT, A_NULL);
+
+    class_addmethod(pdp_opencv_edge_class, (t_method)pdp_opencv_edge_input_0, gensym("pdp"),  A_SYMBOL, A_DEFFLOAT, A_NULL);
+    class_addmethod(pdp_opencv_edge_class, (t_method)pdp_opencv_edge_thresh, gensym("edge_thresh"),  A_FLOAT, A_NULL );   
+
+
+}
+
+#ifdef __cplusplus
+}
+#endif