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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 an adaptation of ripple effect from effectv
* Originally written by Fukuchi Kentaro & others
* Pd-fication by Yves Degoyon
*/
#include "pdp.h"
#include <math.h>
#define MAGIC_THRESHOLD 30
static unsigned int fastrand_val;
#define inline_fastrand() (fastrand_val=fastrand_val*1103515245+12345)
static int sqrtable[256];
static int sqrt_init=1;
static const int point = 16;
static const int impact = 2;
static const int decay = 8;
static const int loopnum = 2;
static int period = 0;
static int rain_stat = 0;
static unsigned int drop_prob = 0;
static int drop_prob_increment = 0;
static int drops_per_frame_max = 0;
static int drops_per_frame = 0;
static int drop_power = 0;
static char *pdp_ripple_version = "pdp_ripple: version 0.1, port of ripple from effectv( Fukuchi Kentaro ) adapted by Yves Degoyon (ydegoyon@free.fr)";
typedef struct pdp_ripple_struct
{
t_object x_obj;
t_float x_f;
t_outlet *x_outlet0;
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;
t_int x_maph;
t_int x_mapw;
t_int x_mode;
t_int x_threshold;
t_int *x_map;
t_int *x_map1;
t_int *x_map2;
t_int *x_map3;
signed char *x_vtable;
short int *x_diff;
short int *x_bdata;
t_int x_snapshot;
} t_pdp_ripple;
static void pdp_ripple_mode(t_pdp_ripple *x, t_floatarg fmode )
{
if ( ( fmode == 0 ) || ( fmode == 1 ) )
{
x->x_mode = (int)fmode;
}
}
static void pdp_ripple_threshold(t_pdp_ripple *x, t_floatarg fthreshold )
{
x->x_threshold = (int)fthreshold;
}
static void pdp_ripple_increment(t_pdp_ripple *x, t_floatarg fincrement )
{
drop_prob_increment = (int)fincrement;
}
static void pdp_ripple_background(t_pdp_ripple *x )
{
x->x_snapshot = 1;
}
static void pdp_ripple_free_ressources(t_pdp_ripple *x)
{
if ( x->x_diff != NULL ) freebytes( x->x_diff, (x->x_vsize + (x->x_vsize>>1))<<1 );
if ( x->x_bdata ) freebytes( x->x_bdata, (( x->x_vsize + (x->x_vsize>>1))<<1));
if ( x->x_map ) freebytes(x->x_map, x->x_maph*x->x_mapw*3*sizeof(t_int));
if ( x->x_vtable ) freebytes(x->x_vtable, x->x_maph*x->x_mapw*2*sizeof(signed char));
}
static void pdp_ripple_allocate(t_pdp_ripple *x)
{
int i;
x->x_diff = (short int*) getbytes((x->x_vsize + (x->x_vsize>>1))<<1);
x->x_bdata = (short int *)getbytes((( x->x_vsize + (x->x_vsize>>1))<<1));
x->x_maph = x->x_vheight / 2 + 1;
x->x_mapw = x->x_vwidth / 2 + 1;
x->x_map = (int *)getbytes(x->x_maph*x->x_mapw*3*sizeof(t_int));
x->x_vtable = (signed char *)getbytes(x->x_maph*x->x_mapw*2*sizeof(signed char));
if( !x->x_map || x->x_vtable || !x->x_bdata || ! x->x_diff ) {
post( "pdp_ripple : severe error : cannot allocate buffers" );
}
x->x_map1 = x->x_map;
x->x_map2 = x->x_map + x->x_maph * x->x_mapw;
x->x_map3 = x->x_map + x->x_mapw * x->x_maph * 2;
}
/* check if there is a real difference with background image */
short int *pdp_ripple_diff(t_pdp_ripple *x, short int *src)
{
int i;
int Y;
int Yb;
short int *p=NULL;
short int *pb=NULL;
short int *r=NULL;
int v;
p = src;
pb = x->x_bdata;
r = x->x_diff;
for(i=0; i<(x->x_vsize); i++) {
Y = (*p);
Yb = (*pb);
*r = ( (Yb - Y) > x->x_threshold ) ? (Yb - Y) : 0;
p++; pb++;
r++;
}
return x->x_diff;
}
static void pdp_ripple_motion_detect(t_pdp_ripple *x, short int *src)
{
short int *diff;
int width;
int *p, *q;
int px, py, h;
diff = pdp_ripple_diff(x, src);
width = x->x_vwidth;
p = x->x_map1+x->x_mapw+1;
q = x->x_map2+x->x_mapw+1;
diff += width+2;
for(py=x->x_maph-2; py>0; py--)
{
for(px=x->x_mapw-2; px>0; px--)
{
h = (int)*diff;// + (int)*(diff+1) + (int)*(diff+width) + (int)*(diff+width+1);
if(h>0) {
*p = h<<(point + impact - 8);
*q = *p;
}
p++;
q++;
diff += 2;
}
diff += width+2;
p+=2;
q+=2;
}
}
static inline void pdp_ripple_drop(t_pdp_ripple *x, int power)
{
int px, py;
int *p, *q;
px = inline_fastrand()%(x->x_mapw-4)+2;
py = inline_fastrand()%(x->x_maph-4)+2;
p = x->x_map1 + py*x->x_mapw + px;
q = x->x_map2 + py*x->x_mapw + px;
*p = power;
*q = power;
*(p-x->x_mapw) = *(p-1) = *(p+1) = *(p+x->x_mapw) = power/2;
*(p-x->x_mapw-1) = *(p-x->x_mapw+1) = *(p+x->x_mapw-1) = *(p+x->x_mapw+1) = power/4;
*(q-x->x_mapw) = *(q-1) = *(q+1) = *(q+x->x_mapw) = power/2;
*(q-x->x_mapw-1) = *(q-x->x_mapw+1) = *(q+x->x_mapw-1) = *(p+x->x_mapw+1) = power/4;
}
static void pdp_ripple_raindrop(t_pdp_ripple *x)
{
int i;
if(period == 0)
{
switch(rain_stat)
{
case 0:
period = (inline_fastrand()>>23)+100;
drop_prob = 0;
drop_prob_increment = 0x00ffffff/period;
drop_power = (-(inline_fastrand()>>28)-2)<<point;
drops_per_frame_max = 2<<(inline_fastrand()>>30); // 2,4,8 or 16
rain_stat = 1;
break;
case 1:
drop_prob = 0x00ffffff;
drops_per_frame = 1;
drop_prob_increment = 1;
period = (drops_per_frame_max - 1) * 16;
rain_stat = 2;
break;
case 2:
period = (inline_fastrand()>>22)+1000;
drop_prob_increment = 0;
rain_stat = 3;
break;
case 3:
period = (drops_per_frame_max - 1) * 16;
drop_prob_increment = -1;
rain_stat = 4;
break;
case 4:
period = (inline_fastrand()>>24)+60;
drop_prob_increment = -(drop_prob/period);
rain_stat = 5;
break;
case 5:
default:
period = (inline_fastrand()>>23)+500;
drop_prob = 0;
rain_stat = 0;
break;
}
}
switch(rain_stat)
{
default:
case 0:
break;
case 1:
case 5:
if((inline_fastrand()>>8)<drop_prob)
{
pdp_ripple_drop(x, drop_power);
}
drop_prob += drop_prob_increment;
break;
case 2:
case 3:
case 4:
for(i=drops_per_frame/16; i>0; i--)
{
pdp_ripple_drop(x, drop_power);
}
drops_per_frame += drop_prob_increment;
break;
}
period--;
}
static void pdp_ripple_process_yv12(t_pdp_ripple *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;
unsigned int totalnbpixels;
unsigned int u_offset;
unsigned int v_offset;
unsigned int totnbpixels;
int px, py;
int dx, dy;
int h, v;
int width, height;
int *p, *q, *r;
signed char *vp;
/* allocate all ressources */
if ( (int)(header->info.image.width*header->info.image.height) != x->x_vsize )
{
pdp_ripple_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_ripple_allocate(x);
post( "pdp_ripple : reallocated buffers" );
}
if ( x->x_bdata && x->x_snapshot )
{
x->x_snapshot = 0;
memcpy( x->x_bdata, data, (x->x_vsize + (x->x_vsize<<1))<<1 );
}
totalnbpixels = x->x_vsize;
u_offset = x->x_vsize;
v_offset = x->x_vsize + (x->x_vsize>>2);
totnbpixels = x->x_vsize + (x->x_vsize>>1);
newheader->info.image.encoding = header->info.image.encoding;
newheader->info.image.width = x->x_vwidth;
newheader->info.image.height = x->x_vheight;
memcpy( newdata, data, (x->x_vsize + (x->x_vsize>>1))<<1 );
if ( x->x_mode )
{
pdp_ripple_motion_detect(x, data);
}
else
{
pdp_ripple_raindrop(x);
}
/* simulate surface wave */
width = x->x_mapw;
height = x->x_maph;
/* This function is called only 30 times per second. To increase a speed
* of wave, iterates this loop several times. */
for(i=loopnum; i>0; i--)
{
/* wave simulation */
p = x->x_map1 + width + 1;
q = x->x_map2 + width + 1;
r = x->x_map3 + width + 1;
for(py=height-2; py>0; py--)
{
for(px=width-2; px>0; px--)
{
h = *(p-width-1) + *(p-width+1) + *(p+width-1) + *(p+width+1)
+ *(p-width) + *(p-1) + *(p+1) + *(p+width) - (*p)*9;
h = h >> 3;
v = *p - *q;
v += h - (v >> decay);
*r = v + *p;
p++;
q++;
r++;
}
p += 2;
q += 2;
r += 2;
}
/* low pass filter */
p = x->x_map3 + width + 1;
q = x->x_map2 + width + 1;
for(py=height-2; py>0; py--)
{
for(px=width-2; px>0; px--)
{
h = *(p-width) + *(p-1) + *(p+1) + *(p+width) + (*p)*60;
*q = h >> 6;
p++;
q++;
}
p+=2;
q+=2;
}
p = x->x_map1;
x->x_map1 = x->x_map2;
x->x_map2 = p;
}
vp = x->x_vtable;
p = x->x_map1;
for(py=height-1; py>0; py--)
{
for(px=width-1; px>0; px--)
{
/* difference of the height between two voxel. They are twiced to
* emphasise the wave. */
vp[0] = sqrtable[((p[0] - p[1])>>(point-1))&0xff];
vp[1] = sqrtable[((p[0] - p[width])>>(point-1))&0xff];
p++;
vp+=2;
}
p++;
vp+=2;
}
height = x->x_vheight;
width = x->x_vwidth;
vp = x->x_vtable;
/* draw refracted image. The vector table is stretched. */
for(py=0; py<height; py+=2)
{
for(px=0; px<width; px+=2)
{
h = (int)vp[0];
v = (int)vp[1];
dx = px + h;
dy = py + v;
if(dx<0) dx=0;
if(dy<0) dy=0;
if(dx>=width) dx=width-1;
if(dy>=height) dy=height-1;
newdata[0] = data[dy*width+dx];
i = dx;
dx = px + 1 + (h+(int)vp[2])/2;
if(dx<0) dx=0;
if(dx>=width) dx=width-1;
newdata[1] = data[dy*width+dx];
dy = py + 1 + (v+(int)vp[x->x_mapw*2+1])/2;
if(dy<0) dy=0;
if(dy>=height) dy=height-1;
newdata[width] = data[dy*width+i];
newdata[width+1] = data[dy*width+dx];
newdata+=2;
vp+=2;
}
newdata += width;
vp += 2;
}
return;
}
static void pdp_ripple_sendpacket(t_pdp_ripple *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_ripple_process(t_pdp_ripple *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_ripple_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_ripple_process_yv12, pdp_ripple_sendpacket, &x->x_queue_id);
break;
case PDP_IMAGE_GREY:
// pdp_ripple_process_packet(x);
break;
default:
/* don't know the type, so dont pdp_ripple_process */
break;
}
}
}
static void pdp_ripple_input_0(t_pdp_ripple *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_ripple_process(x);
}
}
static void pdp_ripple_free(t_pdp_ripple *x)
{
int i;
pdp_queue_finish(x->x_queue_id);
pdp_packet_mark_unused(x->x_packet0);
pdp_ripple_free_ressources(x);
}
t_class *pdp_ripple_class;
void *pdp_ripple_new(void)
{
int i;
t_pdp_ripple *x = (t_pdp_ripple *)pd_new(pdp_ripple_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("mode"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_bang, gensym("background"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("threshold"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("increment"));
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_mode = 0;
x->x_vsize = -1;
x->x_snapshot = 1;
x->x_threshold = MAGIC_THRESHOLD;
if ( sqrt_init )
{
sqrt_init = 0;
for(i=0; i<128; i++) {
sqrtable[i] = i*i;
}
for(i=1; i<=128; i++) {
sqrtable[256-i] = -i*i;
}
}
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_ripple_setup(void)
{
// post( pdp_ripple_version );
pdp_ripple_class = class_new(gensym("pdp_ripple"), (t_newmethod)pdp_ripple_new,
(t_method)pdp_ripple_free, sizeof(t_pdp_ripple), 0, A_NULL);
class_addmethod(pdp_ripple_class, (t_method)pdp_ripple_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_ripple_class, (t_method)pdp_ripple_mode, gensym("mode"), A_FLOAT, A_NULL);
class_addmethod(pdp_ripple_class, (t_method)pdp_ripple_background, gensym("background"), A_NULL);
class_addmethod(pdp_ripple_class, (t_method)pdp_ripple_threshold, gensym("threshold"), A_FLOAT, A_NULL);
class_addmethod(pdp_ripple_class, (t_method)pdp_ripple_increment, gensym("increment"), A_FLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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