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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.
*
*/
/* This object is a port of shagadelic effect from EffecTV
* Originally written by Fukuchi Kentaro
* Pd-fication by Yves Degoyon ( ydegoyon@free.fr )
*/
#include "pdp.h"
#include <math.h>
#define MAX_TABLES 6
static unsigned int fastrand_val;
#define inline_fastrand() (fastrand_val=fastrand_val*1103515245+12345)
static char *pdp_shagadelic_version = "pdp_shagadelic: version 0.1, port of cycle from EffecTV by clifford smith, adapted by ydegoyon@free.fr ";
typedef struct pdp_shagadelic_struct
{
t_object x_obj;
t_float x_f;
t_int x_packet0;
t_int x_packet1;
t_int x_dropped;
t_int x_queue_id;
t_outlet *x_outlet0;
t_int x_vwidth;
t_int x_vheight;
t_int x_vsize;
/* shagadelic parameters */
char *x_ripple;
char *x_spiral;
unsigned char x_phase;
t_int x_rx, x_ry;
t_int x_bx, x_by;
t_int x_rvx, x_rvy;
t_int x_bvx, x_bvy;
short int x_mask;
} t_pdp_shagadelic;
static void pdp_shagadelic_mask(t_pdp_shagadelic *x, t_floatarg fmask )
{
if ( ( fmask >= 0 ) || ( fmask < 65536 ) )
{
x->x_mask = fmask;
}
}
static int pdp_shagadelic_map_from_table(t_pdp_shagadelic *x, t_int px, t_int py, t_int t)
{
int xd,yd;
yd = py + (inline_fastrand() >> 30)-2;
xd = px + (inline_fastrand() >> 30)-2;
if (xd > x->x_vwidth) {
xd-=1;
}
return (xd+yd*x->x_vwidth);
}
static void pdp_shagadelic_init_tables(t_pdp_shagadelic *x)
{
t_int px, py, i;
double xx, yy;
i = 0;
for(py=0; py<x->x_vheight*2; py++)
{
yy = py - x->x_vheight;
yy *= yy;
for(px=0; px<x->x_vwidth*2; px++)
{
xx = px - x->x_vwidth;
x->x_ripple[i++] = ((unsigned int)(sqrt(xx*xx+yy)*8))&255;
}
}
i = 0;
for(py=0; py<x->x_vheight; py++)
{
yy = py - x->x_vheight/2;
for(px=0; px<x->x_vwidth; px++)
{
xx = px - x->x_vwidth/2;
x->x_spiral[i++] = ((unsigned int) ((atan2(xx, yy)/M_PI*256*9) + (sqrt(xx*xx+yy*yy)*5)))&255;
}
}
x->x_rx = inline_fastrand()%x->x_vwidth;
x->x_ry = inline_fastrand()%x->x_vheight;
x->x_bx = inline_fastrand()%x->x_vwidth;
x->x_by = inline_fastrand()%x->x_vheight;
}
static void pdp_shagadelic_free_ressources(t_pdp_shagadelic *x)
{
if (x->x_ripple) freebytes( x->x_ripple, x->x_vsize*4 );
if (x->x_spiral) freebytes( x->x_spiral, x->x_vsize );
}
static void pdp_shagadelic_allocate(t_pdp_shagadelic *x)
{
x->x_ripple = (char *) getbytes( x->x_vsize*4 );
x->x_spiral = (char *) getbytes( x->x_vsize );
}
static void pdp_shagadelic_process_yv12(t_pdp_shagadelic *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);
t_int i;
t_int px, py;
unsigned char y, u, v;
char *p_y, *p_u, *p_v;
/* allocate all ressources */
if ( ((int)header->info.image.width != x->x_vwidth) ||
((int)header->info.image.height != x->x_vheight) )
{
pdp_shagadelic_free_ressources(x);
x->x_vwidth = header->info.image.width;
x->x_vheight = header->info.image.height;
x->x_vsize = x->x_vwidth*x->x_vheight;
pdp_shagadelic_allocate(x);
post( "pdp_shagadelic : reallocated buffers" );
pdp_shagadelic_init_tables(x);
post( "pdp_shagadelic : initialized tables" );
}
newheader->info.image.encoding = header->info.image.encoding;
newheader->info.image.width = x->x_vwidth;
newheader->info.image.height = x->x_vheight;
p_y = &x->x_ripple[x->x_ry*x->x_vwidth*2 + x->x_rx];
p_u = x->x_spiral;
p_v = &x->x_ripple[x->x_by*x->x_vwidth*2 + x->x_bx];
for(py=0; py<x->x_vheight; py++)
{
for(px=0; px<x->x_vwidth; px++)
{
y = (char)(*p_y+x->x_phase*2)>>7;
u = (char)(*p_u+x->x_phase*3)>>7;
v = (char)(*p_v-x->x_phase)>>7;
*(newdata+py*x->x_vwidth+px) = *(data) & (y<<7) & x->x_mask;
*(newdata+x->x_vsize+((py*x->x_vwidth+px)>>2)) = *(data) & ((u-128)<<8) & x->x_mask;
*(newdata+x->x_vsize+(x->x_vsize>>2)+((py*x->x_vwidth+px)>>2)) = *(data) & ((v-128)<<8) & x->x_mask;
p_y++;
p_u++;
p_v++;
data++;
}
p_y += x->x_vwidth;
p_v += x->x_vwidth;
}
x->x_phase -= 8;
if((x->x_rx+x->x_rvx)<0 || (x->x_rx+x->x_rvx)>=x->x_vwidth) x->x_rvx =-x->x_rvx;
if((x->x_ry+x->x_rvy)<0 || (x->x_ry+x->x_rvy)>=x->x_vheight) x->x_rvy =-x->x_rvy;
if((x->x_bx+x->x_bvx)<0 || (x->x_bx+x->x_bvx)>=x->x_vwidth) x->x_bvx =-x->x_bvx;
if((x->x_by+x->x_bvy)<0 || (x->x_by+x->x_bvy)>=x->x_vheight) x->x_bvy =-x->x_bvy;
x->x_rx += x->x_rvx;
x->x_ry += x->x_rvy;
x->x_bx += x->x_bvx;
x->x_by += x->x_bvy;
return;
}
static void pdp_shagadelic_sendpacket(t_pdp_shagadelic *x)
{
/* delete source 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_shagadelic_process(t_pdp_shagadelic *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_shagadelic_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_shagadelic_process_yv12, pdp_shagadelic_sendpacket, &x->x_queue_id);
break;
case PDP_IMAGE_GREY:
// should write something to handle these one day
// but i don't use this mode
break;
default:
/* don't know the type, so dont pdp_shagadelic_process */
break;
}
}
}
static void pdp_shagadelic_input_0(t_pdp_shagadelic *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_shagadelic_process(x);
}
}
static void pdp_shagadelic_free(t_pdp_shagadelic *x)
{
int i;
pdp_shagadelic_free_ressources(x);
pdp_queue_finish(x->x_queue_id);
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_shagadelic_class;
void *pdp_shagadelic_new(void)
{
int i;
t_pdp_shagadelic *x = (t_pdp_shagadelic *)pd_new(pdp_shagadelic_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("mask"));
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_rvx = -2;
x->x_rvy = -2;
x->x_bvx = 2;
x->x_bvy = 2;
x->x_phase = 0;
x->x_mask = 0xffff;
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_shagadelic_setup(void)
{
// post( pdp_shagadelic_version );
pdp_shagadelic_class = class_new(gensym("pdp_shagadelic"), (t_newmethod)pdp_shagadelic_new,
(t_method)pdp_shagadelic_free, sizeof(t_pdp_shagadelic), 0, A_NULL);
class_addmethod(pdp_shagadelic_class, (t_method)pdp_shagadelic_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_shagadelic_class, (t_method)pdp_shagadelic_mask, gensym("mask"), A_DEFFLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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