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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 loads an image from a file and blends it with a video
* It uses imlib2 for all graphical operations
*/
#include "pdp.h"
#include "yuv.h"
#include <math.h>
#include <ctype.h>
#include <Imlib2.h> // imlib2 is required
static char *pdp_imgloader_version = "pdp_imgloader: version 0.1 : image loading object written by ydegoyon@free.fr ";
typedef struct pdp_imgloader_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;
t_int x_xoffset; // x offset of the image
t_int x_yoffset; // y offset of the image
/* imlib data */
Imlib_Image x_image;
DATA32 *x_imdata;
t_int x_iwidth;
t_int x_iheight;
t_float x_blend;
} t_pdp_imgloader;
/* load an image */
static void pdp_imgloader_load(t_pdp_imgloader *x, t_symbol *filename, t_floatarg fx, t_floatarg fy)
{
Imlib_Load_Error imliberr;
post( "pdp_imgloader : loading : %s", filename->s_name );
if ( x->x_image != NULL )
{
imlib_free_image();
}
x->x_image = imlib_load_image_with_error_return( filename->s_name, &imliberr );
if ( imliberr != IMLIB_LOAD_ERROR_NONE )
{
post( "pdp_imgloader : severe error : could not load image (err=%d)!!", imliberr );
x->x_image = NULL;
return;
}
imlib_context_set_image(x->x_image);
x->x_imdata = imlib_image_get_data();
x->x_iwidth = imlib_image_get_width();
x->x_iheight = imlib_image_get_height();
post( "pdp_imgloader : loaded : %s (%dx%d)", filename->s_name, x->x_iwidth, x->x_iheight );
x->x_xoffset = (int) fx;
x->x_yoffset = (int) fy;
}
static void pdp_imgloader_xoffset(t_pdp_imgloader *x, t_floatarg fx )
{
x->x_xoffset = (int) fx;
}
static void pdp_imgloader_yoffset(t_pdp_imgloader *x, t_floatarg fy )
{
x->x_yoffset = (int) fy;
}
static void pdp_imgloader_blend(t_pdp_imgloader *x, t_floatarg fblend )
{
if ( ( fblend > 0.0 ) && ( fblend < 1.0 ) )
{
x->x_blend = fblend;
}
}
static void pdp_imgloader_clear(t_pdp_imgloader *x )
{
if ( x->x_image != NULL )
{
imlib_free_image();
}
x->x_image = NULL;
}
static void pdp_imgloader_process_yv12(t_pdp_imgloader *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 px, py;
t_float alpha, factor;
unsigned char y, u, v;
short int *pY, *pU, *pV;
if ( ( (int)(header->info.image.width) != x->x_vwidth ) ||
( (int)(header->info.image.height) != x->x_vheight ) )
{
x->x_vwidth = header->info.image.width;
x->x_vheight = header->info.image.height;
x->x_vsize = x->x_vwidth*x->x_vheight;
}
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 );
pY = newdata;
pV = newdata+x->x_vsize;
pU = newdata+x->x_vsize+(x->x_vsize>>2);
for ( py=0; py<x->x_vheight; py++ )
{
for ( px=0; px<x->x_vwidth; px++ )
{
if ( ( x->x_image != NULL )
&& (px >= x->x_xoffset) && ( px < x->x_xoffset + x->x_iwidth )
&& (py >= x->x_yoffset) && ( py < x->x_yoffset + x->x_iheight )
)
{
y = yuv_RGBtoY(x->x_imdata[(py-x->x_yoffset)*x->x_iwidth+(px-x->x_xoffset)]);
u = yuv_RGBtoU(x->x_imdata[(py-x->x_yoffset)*x->x_iwidth+(px-x->x_xoffset)]);
v = yuv_RGBtoV(x->x_imdata[(py-x->x_yoffset)*x->x_iwidth+(px-x->x_xoffset)]);
if ( imlib_image_has_alpha() )
{
alpha = (x->x_imdata[(py-x->x_yoffset)*x->x_iwidth+(px-x->x_xoffset)] >> 24)/255;
}
else
{
alpha = 1.0;
}
factor = x->x_blend*alpha;
*(pY) = (int)((1-factor)*(*(pY)) + factor*(y<<7));
if ( (px%2==0) && (py%2==0) )
{
*(pV) = (int)((1-factor)*(*(pV)) + factor*((v-128)<<8));
*(pU) = (int)((1-factor)*(*(pU)) + factor*((u-128)<<8));
}
}
pY++;
if ( (px%2==0) && (py%2==0) )
{
pV++;pU++;
}
}
}
return;
}
static void pdp_imgloader_sendpacket(t_pdp_imgloader *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_imgloader_process(t_pdp_imgloader *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_imgloader_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_imgloader_process_yv12, pdp_imgloader_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_imgloader_process */
break;
}
}
}
static void pdp_imgloader_input_0(t_pdp_imgloader *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_imgloader_process(x);
}
}
static void pdp_imgloader_free(t_pdp_imgloader *x)
{
int i;
pdp_queue_finish(x->x_queue_id);
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_imgloader_class;
void *pdp_imgloader_new(void)
{
int i;
t_pdp_imgloader *x = (t_pdp_imgloader *)pd_new(pdp_imgloader_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("xoffset"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("yoffset"));
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("blend"));
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_image = NULL;
x->x_blend = 1;
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_imgloader_setup(void)
{
post( pdp_imgloader_version );
pdp_imgloader_class = class_new(gensym("pdp_imgloader"), (t_newmethod)pdp_imgloader_new,
(t_method)pdp_imgloader_free, sizeof(t_pdp_imgloader), 0, A_NULL);
class_addmethod(pdp_imgloader_class, (t_method)pdp_imgloader_input_0, gensym("pdp"),
A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_imgloader_class, (t_method)pdp_imgloader_load, gensym("load"), A_SYMBOL, A_DEFFLOAT, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_imgloader_class, (t_method)pdp_imgloader_clear, gensym("clear"), A_NULL);
class_addmethod(pdp_imgloader_class, (t_method)pdp_imgloader_xoffset, gensym("xoffset"), A_DEFFLOAT, A_NULL);
class_addmethod(pdp_imgloader_class, (t_method)pdp_imgloader_yoffset, gensym("yoffset"), A_DEFFLOAT, A_NULL);
class_addmethod(pdp_imgloader_class, (t_method)pdp_imgloader_blend, gensym("blend"), A_DEFFLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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