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-rw-r--r--modules/pdp_shagadelic.c307
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diff --git a/modules/pdp_shagadelic.c b/modules/pdp_shagadelic.c
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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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