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/*
* Pure Data Packet module.
* Copyright (c) by Tom Schouten <tom@zwizwa.be>
*
* 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 module converts a greyscale image or the luma channel of a colour image
to a colour image intensity mask, usable for multiplication */
#include "pdp.h"
#include "pdp_resample.h"
typedef struct pdp_grey2mask_struct
{
t_object x_obj;
t_float x_f;
t_outlet *x_outlet0;
int x_packet0;
int x_dropped;
int x_queue_id;
} t_pdp_grey2mask;
static void pdp_grey2mask_process_grey(t_pdp_grey2mask *x)
{
t_pdp *header = pdp_packet_header(x->x_packet0);
short int *data = (short int *)pdp_packet_data (x->x_packet0);
t_pdp *newheader = 0;
short int *newdata = 0;
int newpacket = -1;
unsigned int w = header->info.image.width;
unsigned int h = header->info.image.height;
unsigned int size = w*h;
unsigned int totalnbpixels = size;
unsigned int u_offset = size;
unsigned int v_offset = size + (size>>2);
unsigned int row, col;
newpacket = pdp_packet_new_image_YCrCb(w, h);
newheader = pdp_packet_header(newpacket);
newdata = (short int *)pdp_packet_data(newpacket);
/* copy luma channel */
memcpy(newdata, data, size * sizeof(s16));
/* subsample luma -> chroma channel */
pdp_resample_halve(data, newdata+u_offset, w, h);
/* copy this to the other chroma channel */
memcpy(newdata+v_offset, newdata+u_offset, (size>>2)*sizeof(s16));
/* delete source packet and replace with new packet */
pdp_packet_mark_unused(x->x_packet0);
x->x_packet0 = newpacket;
return;
}
static void pdp_grey2mask_process_yv12(t_pdp_grey2mask *x)
{
/* process only the luminance channel */
pdp_grey2mask_process_grey(x);
}
static void pdp_grey2mask_process(t_pdp_grey2mask *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_grey2mask_process inputs and write into active inlet */
switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
case PDP_IMAGE_YV12:
pdp_grey2mask_process_yv12(x);
break;
case PDP_IMAGE_GREY:
pdp_grey2mask_process_grey(x);
break;
default:
/* don't know the type, so dont pdp_grey2mask_process */
break;
}
}
}
static void pdp_grey2mask_sendpacket(t_pdp_grey2mask *x)
{
/* unregister and propagate if valid packet */
pdp_packet_pass_if_valid(x->x_outlet0, &x->x_packet0);
}
static void pdp_grey2mask_input_0(t_pdp_grey2mask *x, t_symbol *s, t_floatarg f)
{
int p = (int)f;
if (s== gensym("register_ro")) x->x_dropped = pdp_packet_copy_ro_or_drop(&x->x_packet0, p);
if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped)){
/* add the process method and callback to the process queue */
//pdp_queue_add(x, pdp_grey2mask_process, pdp_grey2mask_sendpacket, &x->x_queue_id);
// since the process method creates a packet, this is not processed in the thread
// $$$TODO: fix this
pdp_grey2mask_process(x);
pdp_grey2mask_sendpacket(x);
}
}
static void pdp_grey2mask_free(t_pdp_grey2mask *x)
{
t_pdp_procqueue *q = pdp_queue_get_queue();
pdp_procqueue_finish(q, x->x_queue_id);
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_grey2mask_class;
void *pdp_grey2mask_new(void)
{
int i;
t_pdp_grey2mask *x = (t_pdp_grey2mask *)pd_new(pdp_grey2mask_class);
x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
x->x_packet0 = -1;
x->x_queue_id = -1;
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_grey2mask_setup(void)
{
pdp_grey2mask_class = class_new(gensym("pdp_grey2mask"), (t_newmethod)pdp_grey2mask_new,
(t_method)pdp_grey2mask_free, sizeof(t_pdp_grey2mask), 0, A_NULL);
class_addmethod(pdp_grey2mask_class, (t_method)pdp_grey2mask_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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