1 files changed, 168 insertions, 0 deletions
diff --git a/modules/pdp_grey.c b/modules/pdp_grey.c
new file mode 100644
index 0000000..0626ea9
--- /dev/null
+++ b/modules/pdp_grey.c
@@ -0,0 +1,168 @@
+/*
+ *   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.
+ *
+ */
+
+
+
+#include "pdp.h"
+
+
+typedef struct pdp_grey_struct
+{
+    t_object x_obj;
+    t_float x_f;
+
+    t_outlet *x_outlet0;
+
+
+    int x_packet0;
+
+} t_pdp_grey;
+
+
+
+static void pdp_grey_process(t_pdp_grey *x)
+{
+    t_pdp *header0 = pdp_packet_header(x->x_packet0);
+    t_pdp *headernew;
+    int newpacket;
+    int w;
+    int h;
+
+    /* check data packets */
+
+    if ((header0) && (PDP_IMAGE == header0->type)){
+
+	/* pdp_grey_process inputs and write into active inlet */
+	switch(header0->info.image.encoding){
+
+	case PDP_IMAGE_YV12:
+	    w = header0->info.image.width;
+	    h = header0->info.image.height;
+	    newpacket = pdp_packet_new(PDP_IMAGE, w*h*2);
+	    headernew = pdp_packet_header(newpacket);
+	    headernew->info.image.encoding = PDP_IMAGE_GREY;
+	    headernew->info.image.width = w;
+	    headernew->info.image.height = h;
+	    memcpy(pdp_packet_data(newpacket), pdp_packet_data(x->x_packet0), 2*w*h);
+	    pdp_packet_mark_unused(x->x_packet0);
+	    x->x_packet0 = newpacket;
+	    break;
+
+	case PDP_IMAGE_GREY:
+	    /* just pass along */
+	    break;
+
+	default:
+	    break;
+	    /* don't know the type, so dont process */
+	    
+	}
+    }
+
+}
+
+
+static void pdp_grey_sendpacket(t_pdp_grey *x)
+{
+    /* unregister and propagate if valid packet */
+    pdp_pass_if_valid(x->x_outlet0, &x->x_packet0);
+}
+
+static void pdp_grey_input_0(t_pdp_grey *x, t_symbol *s, t_floatarg f)
+{
+
+    int p = (int)f;
+    int passes, i;
+
+    if (s== gensym("register_rw"))  pdp_packet_copy_rw_or_drop(&x->x_packet0, p);
+
+
+    if ((s == gensym("process")) && (-1 != x->x_packet0)){
+
+	pdp_grey_process(x);
+	pdp_grey_sendpacket(x);
+    }
+
+}
+
+
+
+
+short int pdp_grey_fixedpoint(float f)
+{
+
+  float min = (float)-0x7fff;
+  float max = (float)0x7fff;
+  f *= (float)0x100;  
+  if (f>max) f = max;
+  if (f<min) f = min;
+
+  return (short int)f;
+  
+}
+
+
+t_class *pdp_grey_class;
+
+
+
+void pdp_grey_free(t_pdp_grey *x)
+{
+}
+
+void *pdp_grey_new(t_floatarg f)
+{
+    t_pdp_grey *x = (t_pdp_grey *)pd_new(pdp_grey_class);
+
+
+    /* no arg, or zero -> gain = 1 */
+    if (f==0.0f) f = 1.0f;
+
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("gain"));
+
+    x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); 
+
+    x->x_packet0 = -1;
+
+    return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_grey_setup(void)
+{
+
+
+    pdp_grey_class = class_new(gensym("pdp_grey"), (t_newmethod)pdp_grey_new,
+    	(t_method)pdp_grey_free, sizeof(t_pdp_grey), 0, A_DEFFLOAT, A_NULL);
+
+
+    class_addmethod(pdp_grey_class, (t_method)pdp_grey_input_0, gensym("pdp"),  A_SYMBOL, A_DEFFLOAT, A_NULL);
+
+}
+
+#ifdef __cplusplus
+}
+#endif