PiDiP 0.12.19

svn path=/trunk/externals/pidip/; revision=3312

1 files changed, 232 insertions, 0 deletions

diff --git a/modules/pdp_fdiff.c b/modules/pdp_fdiff.c
new file mode 100644
index 0000000..aefea1f
--- /dev/null
+++ b/modules/pdp_fdiff.c
@@ -0,0 +1,232 @@
+/*
+ *   PiDiP module.
+ *   Copyright (c) by Yves Degoyon (ydegoyon@free.fr)
+ *
+ *   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 "pdp.h"
+#include <math.h>
+
+static char   *pdp_fdiff_version = "pdp_fdiff: version 0.1, frame difference estimator, written by Yves Degoyon (ydegoyon@free.fr)";
+
+typedef struct pdp_fdiff_struct
+{
+    t_object x_obj;
+    t_float x_f;
+
+    t_outlet *x_outlet0;
+    t_outlet *x_diffy;
+    t_outlet *x_diffu;
+    t_outlet *x_diffv;
+    t_int x_packet0;
+    t_int x_packet1;
+    t_int x_dropped;
+    t_int x_queue_id;
+
+    t_int x_vwidth;
+    t_int x_vheight;
+    t_int x_vsize;
+    unsigned int x_encoding;
+    short int *x_pframe;
+
+} t_pdp_fdiff;
+
+static void pdp_fdiff_allocate(t_pdp_fdiff *x, t_int newsize)
+{
+ int i;
+
+  if ( x->x_pframe != NULL ) freebytes( x->x_pframe, (x->x_vsize + (x->x_vsize>>1))<<1 ); 
+
+  x->x_vsize = newsize;
+  x->x_pframe = (short int*) getbytes((x->x_vsize + (x->x_vsize>>1))<<1);
+}
+
+static void pdp_fdiff_process_yv12(t_pdp_fdiff *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);
+    int       i;
+
+    t_int px, py;
+    short int *diff;
+    short int *sy, *su, *sv, t;
+    short int *sby, *sbu, *sbv;
+    t_int Y=0, U=0, V=0;
+    t_int maxdy=0, maxdu=0, maxdv=0, pdiff;
+
+    /* allocate all ressources */
+    if ( ((int)header->info.image.width != x->x_vwidth ) ||
+         ((int)header->info.image.height != x->x_vheight ) ) 
+    {
+        pdp_fdiff_allocate(x, header->info.image.width*header->info.image.height );
+        post( "pdp_fdiff : reallocating buffers" );
+    }
+
+    x->x_vwidth = header->info.image.width;
+    x->x_vheight = header->info.image.height;
+    x->x_vsize = x->x_vwidth*x->x_vheight;
+    x->x_encoding = header->info.image.encoding;
+
+    newheader->info.image.encoding = x->x_encoding;
+    newheader->info.image.width = x->x_vwidth;
+    newheader->info.image.height = x->x_vheight;
+
+    sy = data;
+    sv = (data+x->x_vsize);
+    su = (data+x->x_vsize+(x->x_vsize>>2));
+    sby = x->x_pframe;
+    sbv = (x->x_pframe+x->x_vsize);
+    sbu = (x->x_pframe+x->x_vsize+(x->x_vsize>>2));
+    maxdy = 0; maxdv = 0; maxdu =0;
+
+    for(py=0; py<x->x_vheight; py++) 
+    {
+      for(px=0; px<x->x_vwidth; px++) 
+      {
+         pdiff = abs( *(sy+py*x->x_vwidth+px) - *(sby+py*x->x_vwidth+px) );
+         if ( pdiff > maxdy ) maxdy = pdiff;
+         if ( px%2==0 && py%2==0 )
+         {
+           pdiff = abs( *(su+(py>>1)*(x->x_vwidth>>1)+(px>>1)) - *(sbu+(py>>1)*(x->x_vwidth>>1)+(px>>1)) );
+           if ( pdiff > maxdu ) maxdu = pdiff;
+           pdiff = abs( *(sv+(py>>1)*(x->x_vwidth>>1)+(px>>1)) - *(sbv+(py>>1)*(x->x_vwidth>>1)+(px>>1)) );
+           if ( pdiff > maxdv ) maxdv = pdiff;
+         }
+      }
+    }
+
+    outlet_float( x->x_diffy, (maxdy>>7) );
+    outlet_float( x->x_diffu, (maxdu>>8) );
+    outlet_float( x->x_diffv, (maxdv>>8) );
+
+    /* save previous frame */
+    memcpy( x->x_pframe, data, (( x->x_vsize + (x->x_vsize>>1))<<1)); 
+    memcpy( newdata, data, (( x->x_vsize + (x->x_vsize>>1))<<1)); 
+    
+    return;
+}
+
+static void pdp_fdiff_sendpacket(t_pdp_fdiff *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_fdiff_process(t_pdp_fdiff *x)
+{
+   int encoding;
+   t_pdp *header = 0;
+
+   /* check if image data packets are compatible */
+   if ( (header = pdp_packet_header(x->x_packet0))
+	&& (PDP_IMAGE == header->type)){
+    
+	/* pdp_fdiff_process inputs and write into active inlet */
+	switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
+
+	case PDP_IMAGE_YV12:
+            x->x_packet1 = pdp_packet_clone_rw(x->x_packet0);
+            pdp_queue_add(x, pdp_fdiff_process_yv12, pdp_fdiff_sendpacket, &x->x_queue_id);
+	    break;
+
+	case PDP_IMAGE_GREY:
+	    // pdp_fdiff_process_packet(x);
+	    break;
+
+	default:
+	    /* don't know the type, so dont pdp_fdiff_process */
+	    break;
+	    
+	}
+    }
+}
+
+static void pdp_fdiff_input_0(t_pdp_fdiff *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("image/YCrCb/*") );
+
+    if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped)){
+
+        /* add the process method and callback to the process queue */
+        pdp_fdiff_process(x);
+
+    }
+}
+
+static void pdp_fdiff_free(t_pdp_fdiff *x)
+{
+  int i;
+
+    pdp_queue_finish(x->x_queue_id);
+    pdp_packet_mark_unused(x->x_packet0);
+
+    if ( x->x_pframe ) freebytes( x->x_pframe, (x->x_vsize + (x->x_vsize>>1))<<1 );
+
+}
+
+t_class *pdp_fdiff_class;
+
+void *pdp_fdiff_new(void)
+{
+    int i;
+
+    t_pdp_fdiff *x = (t_pdp_fdiff *)pd_new(pdp_fdiff_class);
+
+    x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); 
+    x->x_diffy = outlet_new(&x->x_obj, &s_float); 
+    x->x_diffu = outlet_new(&x->x_obj, &s_float); 
+    x->x_diffv = outlet_new(&x->x_obj, &s_float); 
+
+    x->x_packet0 = -1;
+    x->x_packet1 = -1;
+    x->x_queue_id = -1;
+
+    x->x_pframe = NULL;
+
+    return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_fdiff_setup(void)
+{
+//    post( pdp_fdiff_version );
+    pdp_fdiff_class = class_new(gensym("pdp_fdiff"), (t_newmethod)pdp_fdiff_new,
+    	(t_method)pdp_fdiff_free, sizeof(t_pdp_fdiff), 0, A_NULL);
+
+    class_addmethod(pdp_fdiff_class, (t_method)pdp_fdiff_input_0, gensym("pdp"),  A_SYMBOL, A_DEFFLOAT, A_NULL);
+    class_sethelpsymbol( pdp_fdiff_class, gensym("pdp_fdiff.pd") );
+
+}
+
+#ifdef __cplusplus
+}
+#endif