/*
* 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 saves a snaphot to a file
* Image type is specified by extension
* It uses imlib2 for all graphical operations
*/
#include "pdp.h"
#include "yuv.h"
#include <math.h>
#include <ctype.h>
#include <pthread.h>
#include <Imlib2.h> // imlib2 is required
static char *pdp_imgsaver_version = "pdp_imgsaver: version 0.1 : image snapshot object written by ydegoyon@free.fr ";
typedef struct pdp_imgsaver_struct
{
t_object x_obj;
t_float x_f;
int x_packet0;
int x_packet1;
int x_dropped;
int x_queue_id;
t_outlet *x_outlet0;
int x_vwidth;
int x_vheight;
int x_vsize;
int x_save_pending;
/* imlib data */
Imlib_Image x_image;
DATA32 *x_imdata;
int x_iwidth;
int x_iheight;
t_symbol *x_filename;
short int *x_datas;
pthread_t x_savechild; /* thread id for the saving child */
} t_pdp_imgsaver;
/* do save the image */
static void *pdp_imgsaver_do_save(void *tdata)
{
Imlib_Load_Error imliberr;
t_pdp_imgsaver *x = (t_pdp_imgsaver*) tdata;
int px, py;
short int *pY, *pU, *pV;
unsigned char y, u, v;
if ( ( x->x_vwidth == 0 ) || ( x->x_vheight == 0 ) )
{
post( "pdp_imgsaver : tried to save an image but no video is playing" );
x->x_save_pending = 0;
x->x_filename = NULL;
return NULL;
}
x->x_image = imlib_create_image( x->x_vwidth, x->x_vheight );
if ( x->x_image == NULL )
{
post( "pdp_imgsaver : severe error : could not allocate image !!" );
x->x_save_pending = 0;
x->x_filename = NULL;
return NULL;
}
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();
pY = x->x_datas;
pV = x->x_datas+x->x_vsize;
pU = x->x_datas+x->x_vsize+(x->x_vsize>>2);
for ( py=0; py<x->x_iheight; py++ )
{
for ( px=0; px<x->x_iwidth; px++ )
{
y = *(pY)>>7;
v = (*(pV)>>8)+128;
u = (*(pU)>>8)+128;
x->x_imdata[ py*x->x_iwidth + px ] = yuv_YUVtoRGB( y, u, v );
pY++;
if ( (px%2==0) && (py%2==0) )
{
pV++;pU++;
}
}
}
post( "pdp_imgsaver : saving image to : %s", x->x_filename->s_name );
imlib_save_image_with_error_return(x->x_filename->s_name, &imliberr );
if ( imliberr != IMLIB_LOAD_ERROR_NONE )
{
post( "pdp_imgsaver : severe error : could not save image (err=%d)!!", imliberr );
}
else
{
post( "pdp_imgsaver : saved to : %s", x->x_filename->s_name );
}
//if ( x->x_image != NULL )
//{
// imlib_free_image();
//}
x->x_image = NULL;
x->x_save_pending = 0;
x->x_filename = NULL;
post( "pdp_imgsaver : saving thread %d finished", x->x_savechild );
x->x_savechild = 0;
return NULL;
}
/* launched the thread to save the image */
static void pdp_imgsaver_save(t_pdp_imgsaver *x, t_symbol *filename)
{
pthread_attr_t save_child_attr;
if ( x->x_save_pending )
{
post( "pdp_imgsaver : a save operation is currently running...retry later" );
return;
}
x->x_save_pending = 1;
x->x_filename = filename;
//if ( x->x_image != NULL )
//{
// imlib_free_image();
//}
x->x_image = NULL;
// launch saving thread
if ( pthread_attr_init( &save_child_attr ) < 0 )
{
post( "pdp_imgsaver : could not launch save thread" );
perror( "pthread_attr_init" );
return;
}
if ( pthread_attr_setdetachstate( &save_child_attr, PTHREAD_CREATE_DETACHED ) < 0 ) {
post( "pdp_imgsaver : could not launch save thread" );
perror( "pthread_attr_setdetachstate" );
return;
}
if ( pthread_create( &x->x_savechild, &save_child_attr, pdp_imgsaver_do_save, x ) < 0 ) {
post( "pdp_imgsaver : could not launch save thread" );
perror( "pthread_create" );
return;
}
else
{
post( "pdp_imgsaver : saving thread %d launched", (int)x->x_savechild );
}
}
static void pdp_imgsaver_allocate(t_pdp_imgsaver *x)
{
x->x_datas = (short int *)getbytes((( x->x_vsize + (x->x_vsize>>1))<<1));
}
static void pdp_imgsaver_free_ressources(t_pdp_imgsaver *x)
{
if ( x->x_datas ) freebytes( x->x_datas, (( x->x_vsize + (x->x_vsize>>1))<<1));
}
static void pdp_imgsaver_process_yv12(t_pdp_imgsaver *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);
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 ) )
{
pdp_imgsaver_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_imgsaver_allocate(x);
}
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 );
if ( !x->x_save_pending )
{
memcpy( x->x_datas, data, (x->x_vsize+(x->x_vsize>>1))<<1 );
}
return;
}
static void pdp_imgsaver_sendpacket(t_pdp_imgsaver *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_imgsaver_process(t_pdp_imgsaver *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_imgsaver_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_imgsaver_process_yv12, pdp_imgsaver_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_imgsaver_process */
break;
}
}
}
static void pdp_imgsaver_input_0(t_pdp_imgsaver *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_imgsaver_process(x);
}
}
static void pdp_imgsaver_free(t_pdp_imgsaver *x)
{
int i;
pdp_imgsaver_free_ressources(x);
pdp_queue_finish(x->x_queue_id);
pdp_packet_mark_unused(x->x_packet0);
}
t_class *pdp_imgsaver_class;
void *pdp_imgsaver_new(void)
{
int i;
t_pdp_imgsaver *x = (t_pdp_imgsaver *)pd_new(pdp_imgsaver_class);
x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
x->x_packet0 = -1;
x->x_packet1 = -1;
x->x_datas = NULL;
x->x_queue_id = -1;
x->x_image = NULL;
x->x_vwidth = 0;
x->x_vheight = 0;
x->x_save_pending = 0;
x->x_filename = NULL;
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_imgsaver_setup(void)
{
// post( pdp_imgsaver_version );
pdp_imgsaver_class = class_new(gensym("pdp_imgsaver"), (t_newmethod)pdp_imgsaver_new,
(t_method)pdp_imgsaver_free, sizeof(t_pdp_imgsaver), 0, A_NULL);
class_addmethod(pdp_imgsaver_class, (t_method)pdp_imgsaver_input_0, gensym("pdp"),
A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_imgsaver_class, (t_method)pdp_imgsaver_save, gensym("save"), A_SYMBOL, A_NULL);
}
#ifdef __cplusplus
}
#endif