1 files changed, 58 insertions, 0 deletions
diff --git a/gr-atsc/include/atsc/syminfo_impl.h b/gr-atsc/include/atsc/syminfo_impl.h
new file mode 100644
index 0000000000..9f25e4902a
--- /dev/null
+++ b/gr-atsc/include/atsc/syminfo_impl.h
@@ -0,0 +1,58 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 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.
+ */
+#ifndef _ATSC_SYMINFO_H_
+#define _ATSC_SYMINFO_H_
+
+namespace atsc {
+
+  static const unsigned int SI_SEGMENT_NUM_MASK       = 0x1ff;
+  static const unsigned int SI_FIELD_SYNC_SEGMENT_NUM = SI_SEGMENT_NUM_MASK;  // conceptually -1
+
+  struct syminfo {
+    unsigned int    symbol_num		: 10;	// 0..831
+    unsigned int    segment_num		:  9;	// 0..311 and SI_FIELD_SYNC_SEGMENT_NUM
+    unsigned int    field_num		:  1;	// 0..1
+    unsigned int    valid		:  1;	// contents are valid
+  };
+
+
+  static inline bool
+  tag_is_start_field_sync (syminfo tag)
+  {
+    return tag.symbol_num == 0 && tag.segment_num == SI_FIELD_SYNC_SEGMENT_NUM && tag.valid;
+  }
+
+  static inline bool
+  tag_is_start_field_sync_1 (syminfo tag)
+  {
+    return tag_is_start_field_sync (tag) && tag.field_num == 0;
+  }
+
+  static inline bool
+  tag_is_start_field_sync_2 (syminfo tag)
+  {
+    return tag_is_start_field_sync (tag) && tag.field_num == 1;
+  }
+
+}
+
+#endif /* _ATSC_SYMINFO_H_ */