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/*
* 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;
int x_packet0;
int x_packet1;
int x_dropped;
int x_queue_id;
int x_vwidth;
int x_vheight;
int x_vsize;
unsigned int x_encoding;
short int *x_pframe;
} t_pdp_fdiff;
static void pdp_fdiff_allocate(t_pdp_fdiff *x, 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;
int px, py;
short int *diff;
short int *sy, *su, *sv, t;
short int *sby, *sbu, *sbv;
int Y=0, U=0, V=0;
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);
}
#ifdef __cplusplus
}
#endif
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