1 files changed, 59 insertions, 0 deletions
diff --git a/gr-atsc/lib/plinfo.cc b/gr-atsc/lib/plinfo.cc
new file mode 100644
index 0000000000..8ad28c6001
--- /dev/null
+++ b/gr-atsc/lib/plinfo.cc
@@ -0,0 +1,59 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2002,2006 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <atsc/types.h>
+#include <assert.h>
+
+void
+plinfo::delay (plinfo &out, const plinfo &in, int nsegs_of_delay)
+{
+  assert (in.regular_seg_p ());
+  assert (nsegs_of_delay >= 0);
+
+  int	s = in.segno ();
+  if (in.in_field2_p ())
+    s += ATSC_DSEGS_PER_FIELD;
+
+  s -= nsegs_of_delay;
+  if (s < 0)
+    s += 2 * ATSC_DSEGS_PER_FIELD;
+
+  assert (0 <= s && s < 2 * ATSC_DSEGS_PER_FIELD);
+
+  if (s < ATSC_DSEGS_PER_FIELD)
+    out.set_regular_seg (false, s);				// field 1
+  else
+    out.set_regular_seg (true, s - ATSC_DSEGS_PER_FIELD);	// field 2
+}
+
+void
+plinfo::sanity_check (const plinfo &x)
+{
+  // basic sanity checks...
+  assert (x.segno () >= 0);
+  assert (x.segno () < (unsigned) ATSC_DSEGS_PER_FIELD);
+  assert ((x.flags () & ~0x3f) == 0);
+
+  assert (x.regular_seg_p () ^ x.field_sync_p ());
+  assert ((x.segno () != 0) ^ x.first_regular_seg_p ());
+}
+