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/*
* Pure Data Packet module.
* Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
*
* 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>
typedef struct pdp_scanxy_struct
{
t_object x_obj;
t_float x_f;
t_outlet *x_outlet0;
t_outlet *x_outlet1;
int x_packet0;
int x_packet1;
int x_interpolate;
} t_pdp_scanxy;
static t_int *pdp_scanxy_perform(t_int *w)
{
t_pdp_scanxy *x = (t_pdp_scanxy *)(w[1]);
t_int n = (t_int)(w[2]);
t_float *inx = (float *)(w[3]);
t_float *iny = (float *)(w[4]);
t_float *out = (float *)(w[5]);
/* check if valid image */
if (-1 == x->x_packet0){
while (n--) *out++ = 0;
return (w+6);
}
else{
t_pdp *header0 = pdp_packet_header(x->x_packet0);
short int *data0 = (short int *)pdp_packet_data (x->x_packet0);
short int *data1 = (short int *)pdp_packet_data (x->x_packet1);
int width = (float)header0->info.image.width;
int height = (float)header0->info.image.height;
int i;
float scale = 1.0f / 32767.0f;
float scalein = 0x10000;
if (x->x_interpolate && (-1 != x->x_packet1)){
float a_old = 1.0f;
float a_new = 0.0f;
float a_inc = 1.0f / (float)n;
float old, new;
while(n--){
int xxx = ((((int)(scalein * *inx++)) & 0xffff) * width) >> 16;
int yyy = ((((int)(scalein * *iny++)) & 0xffff) * height) >> 16;
int offset = yyy*width+xxx;
new = ((float)(data0[offset])) * scale;
old = ((float)(data1[offset])) * scale;
*out++ = a_old * old + a_new * new;
a_new += a_inc;
a_old -= a_inc;
}
pdp_packet_mark_unused(x->x_packet1);
x->x_packet1 = -1;
}
else{
while(n--){
int xxx = ((((int)(scalein * *inx++)) & 0xffff) * width) >> 16;
int yyy = ((((int)(scalein * *iny++)) & 0xffff) * height) >> 16;
int offset = yyy*width+xxx;
*out++ = ((float)(data0[offset])) * scale;
}
}
return (w+6);
}
}
static void pdp_scanxy_input_0(t_pdp_scanxy *x, t_symbol *s, t_floatarg f)
{
int packet = (int)f;
/* register */
if (s== gensym("register_ro")){
t_pdp *header = pdp_packet_header(packet);
if (!header) return;
if (PDP_IMAGE != header->type) return;
if ((header->info.image.encoding != PDP_IMAGE_YV12) && (header->info.image.encoding != PDP_IMAGE_GREY)) return;
/* replace if not compatible or we are not interpolating */
if (!x->x_interpolate || (!pdp_type_compat_image(x->x_packet0, packet))){
pdp_packet_mark_unused(x->x_packet0);
x->x_packet0 = pdp_packet_copy_ro(packet);
}
/* otherwize keep the old one */
else{
pdp_packet_mark_unused(x->x_packet1);
x->x_packet1 = x->x_packet0;
x->x_packet0 = pdp_packet_copy_ro(packet);
}
}
/* pass packet */
if (s== gensym("process")){
//if (-1 != x->x_packet0) outlet_pdp (x->x_outlet0, x->x_packet0);
}
}
static void pdp_scanxy_dsp (t_pdp_scanxy *x, t_signal **sp)
{
dsp_add(pdp_scanxy_perform, 5, x, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
}
static void pdp_scanxy_interpolate(t_pdp_scanxy *x, t_floatarg f)
{
if (0.0 == f){
x->x_interpolate = 0;
pdp_packet_mark_unused(x->x_packet1);
}
if (1.0 == f) x->x_interpolate = 1;
}
static void pdp_scanxy_free(t_pdp_scanxy *x)
{
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_scanxy_class;
void *pdp_scanxy_new(void)
{
t_pdp_scanxy *x = (t_pdp_scanxy *)pd_new(pdp_scanxy_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("signal"), gensym("signal"));
x->x_outlet1 = outlet_new(&x->x_obj, &s_signal);
x->x_packet0 = -1;
x->x_packet1 = -1;
pdp_scanxy_interpolate(x, 0);
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_scanxy_setup(void)
{
pdp_scanxy_class = class_new(gensym("pdp_scanxy~"), (t_newmethod)pdp_scanxy_new,
(t_method)pdp_scanxy_free, sizeof(t_pdp_scanxy), 0, A_NULL);
CLASS_MAINSIGNALIN(pdp_scanxy_class, t_pdp_scanxy, x_f);
class_addmethod(pdp_scanxy_class, (t_method)pdp_scanxy_interpolate, gensym("interpolate"), A_FLOAT, A_NULL);
class_addmethod(pdp_scanxy_class, (t_method)pdp_scanxy_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_scanxy_class, (t_method)pdp_scanxy_dsp, gensym("dsp"), A_NULL);
}
#ifdef __cplusplus
}
#endif
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