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-rw-r--r--modules/pdp_imgloader.c300
1 files changed, 300 insertions, 0 deletions
diff --git a/modules/pdp_imgloader.c b/modules/pdp_imgloader.c
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--- /dev/null
+++ b/modules/pdp_imgloader.c
@@ -0,0 +1,300 @@
+/*
+ * 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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