atsc.pad() - Pads a 188 byte mpeg transport stream packet out to 256

bytes for atsc transmitter randomizer. Opposite of depad.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3916 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 55 insertions, 0 deletions

diff --git a/gr-atsc/src/lib/atsc_pad.h b/gr-atsc/src/lib/atsc_pad.h
new file mode 100644
index 000000000..dc06d8f33
--- /dev/null
+++ b/gr-atsc/src/lib/atsc_pad.h
@@ -0,0 +1,55 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 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 2, 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 INCLUDED_ATSC_PAD_H
+#define INCLUDED_ATSC_PAD_H
+
+#include <gr_sync_decimator.h>
+
+class atsc_pad;
+typedef boost::shared_ptr<atsc_pad> atsc_pad_sptr;
+
+atsc_pad_sptr atsc_make_pad();
+
+/*!
+ * \brief pad mpeg ts packets from 188 byte char to 
+ * to 256 byte atsc_mpeg_packet
+ * \ingroup atsc
+ *
+ * input: unsigned char; output: atsc_mpeg_packet
+ */
+class atsc_pad : public gr_sync_decimator
+{
+  friend atsc_pad_sptr atsc_make_pad();
+
+  atsc_pad();
+
+public:
+  void forecast (int noutput_items, gr_vector_int &ninput_items_required);
+  int work (int noutput_items,
+	    gr_vector_const_void_star &input_items,
+	    gr_vector_void_star &output_items);
+
+  void reset() { /* nop */ }
+};
+
+
+#endif /* INCLUDED_ATSC_PAD_H */