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-rw-r--r--modules/pdp_imgsaver.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/modules/pdp_imgsaver.c b/modules/pdp_imgsaver.c
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--- /dev/null
+++ b/modules/pdp_imgsaver.c
@@ -0,0 +1,340 @@
+/*
+ * 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;
+
+ 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_save_pending;
+
+ /* imlib data */
+ Imlib_Image x_image;
+ DATA32 *x_imdata;
+ t_int x_iwidth;
+ t_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;
+ t_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);
+ 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 ) )
+ {
+ 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
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