1 files changed, 54 insertions, 0 deletions
diff --git a/plugins/shn/shorten.c b/plugins/shn/shorten.c
new file mode 100644
index 00000000..0c92af83
--- /dev/null
+++ b/plugins/shn/shorten.c
@@ -0,0 +1,54 @@
+/******************************************************************************
+*                                                                             *
+*  Copyright (C) 1992-1995 Tony Robinson                                      *
+*                                                                             *
+*  See the file doc/LICENSE.shorten for conditions on distribution and usage  *
+*                                                                             *
+******************************************************************************/
+
+/*
+ * $Id: shorten.c,v 1.7 2003/08/26 05:34:04 jason Exp $
+ */
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <setjmp.h>
+#include "shorten.h"
+
+void init_offset(slong **offset,int nchan,int nblock,int ftype)
+{
+  slong mean = 0;
+  int  chan, i;
+
+  /* initialise offset */
+  switch(ftype)
+  {
+  	case TYPE_AU1:
+  	case TYPE_S8:
+  	case TYPE_S16HL:
+  	case TYPE_S16LH:
+  	case TYPE_ULAW:
+  	case TYPE_AU2:
+  	case TYPE_AU3:
+  	case TYPE_ALAW:
+    	mean = 0;
+    	break;
+  	case TYPE_U8:
+    	mean = 0x80;
+    	break;
+  	case TYPE_U16HL:
+  	case TYPE_U16LH:
+    	mean = 0x8000;
+    	break;
+  	default:
+        shn_debug("Unknown file type: %d", ftype);
+  }
+
+  for(chan = 0; chan < nchan; chan++)
+    for(i = 0; i < nblock; i++)
+      offset[chan][i] = mean;
+}