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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.
*
*/
/* 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_slice_glue_struct
{
t_object x_obj;
t_float x_f;
t_outlet *x_outlet0;
int x_packet0; //input packet
int x_packet1; //output packet
} t_pdp_slice_glue;
static void pdp_slice_glue_process_grey(t_pdp_slice_glue *x)
{
t_pdp *header0 = pdp_packet_header(x->x_packet0);
t_pdp *header1 = pdp_packet_header(x->x_packet1);
short int *data0 = (short int *)pdp_packet_data (x->x_packet0);
short int *data1 = (short int *)pdp_packet_data (x->x_packet1);
unsigned int offset = header0->info.image.width * header0->info.image.slice_yoff;
unsigned int slice_size = header0->info.image.width * header0->info.image.height;
memcpy(data1 + offset, data0, slice_size << 1);
return;
}
static void pdp_slice_glue_process_yv12(t_pdp_slice_glue *x)
{
t_pdp *header0 = pdp_packet_header(x->x_packet0);
t_pdp *header1 = pdp_packet_header(x->x_packet1);
short int *data0 = (short int *)pdp_packet_data (x->x_packet0);
short int *data1 = (short int *)pdp_packet_data (x->x_packet1);
unsigned int w = header0->info.image.width;
unsigned int h = header0->info.image.height;
unsigned int dw = header1->info.image.width;
unsigned int dh = header1->info.image.height;
unsigned int dsize = dh*dw;
unsigned int offset = w * header0->info.image.slice_yoff;
unsigned int slice_size = w * h;
memcpy(data1 + offset, data0, slice_size << 1);
memcpy(data1 + dsize + (offset >> 2), data0 + slice_size, slice_size >> 1);
memcpy(data1 + dsize + (dsize >>2) + (offset>>2), data0 + slice_size + (slice_size >> 2), slice_size >> 1);
return;
}
static void pdp_slice_glue_process(t_pdp_slice_glue *x)
{
int encoding;
int newpacket;
t_pdp *header = 0;
t_pdp *dest_header = 0;
/* check if the packet is a valid slice packet */
/* if not pass it along */
if (!((header = pdp_packet_header(x->x_packet0)) &&
(PDP_IMAGE == header->type) && (header->info.image.orig_height))) goto passalong;
/* if this is the first slice of a sequence, or we don't have a dest packet yet */
/* create a new destination packet */
if ((x->x_packet1 == -1) || (header->info.image.slice_sync & PDP_IMAGE_SLICE_FIRST)){
pdp_packet_mark_unused(x->x_packet1);
x->x_packet1 = pdp_packet_new(PDP_IMAGE, ((header->size - PDP_HEADER_SIZE) / header->info.image.height)
* header->info.image.orig_height);
dest_header = pdp_packet_header(x->x_packet1);
dest_header->info.image.encoding = header->info.image.encoding;
dest_header->info.image.width = header->info.image.width;
dest_header->info.image.height = header->info.image.orig_height;
}
/* if this is a body or last slice, it has to be compatible with the current dest packet */
/* else ignore it */
else{
dest_header = pdp_packet_header(x->x_packet1);
if (!((dest_header->info.image.encoding == header->info.image.encoding) &&
((dest_header->info.image.width == header->info.image.width)))) goto dispose;
}
/* now we have a dest packet and the source packet is compatible with it, so copy the data */
switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
case PDP_IMAGE_YV12:
pdp_slice_glue_process_yv12(x);
break;
case PDP_IMAGE_GREY:
pdp_slice_glue_process_grey(x);
break;
default:
/* don't know the type, so dont pdp_slice_glue_process */
break;
}
/* if the source packet was a final slice, pass on the constructed packet */
if (header->info.image.slice_sync & PDP_IMAGE_SLICE_LAST){
pdp_pass_if_valid(x->x_outlet0, &x->x_packet1);
}
/* processing is done so we delete the source packet */
dispose:
pdp_packet_mark_unused(x->x_packet0);
x->x_packet0 = -1;
return;
passalong:
pdp_pass_if_valid(x->x_outlet0, &x->x_packet0);
return;
}
static void pdp_slice_glue_input_0(t_pdp_slice_glue *x, t_symbol *s, t_floatarg f)
{
int p = (int)f;
if (s== gensym("register_ro")) x->x_packet0 = pdp_packet_copy_ro(p);
if ((s == gensym("process")) && (-1 != x->x_packet0)) pdp_slice_glue_process(x);
}
static void pdp_slice_glue_free(t_pdp_slice_glue *x)
{
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_slice_glue_class;
void *pdp_slice_glue_new(void)
{
int i;
t_pdp_slice_glue *x = (t_pdp_slice_glue *)pd_new(pdp_slice_glue_class);
x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
x->x_packet0 = -1;
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_slice_glue_setup(void)
{
pdp_slice_glue_class = class_new(gensym("pdp_slice_glue"), (t_newmethod)pdp_slice_glue_new,
(t_method)pdp_slice_glue_free, sizeof(t_pdp_slice_glue), 0, A_NULL);
class_addmethod(pdp_slice_glue_class, (t_method)pdp_slice_glue_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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