1 files changed, 85 insertions, 0 deletions
diff --git a/gr-digital/lib/header_payload_demux_impl.h b/gr-digital/lib/header_payload_demux_impl.h
new file mode 100644
index 0000000000..ceab9a8629
--- /dev/null
+++ b/gr-digital/lib/header_payload_demux_impl.h
@@ -0,0 +1,85 @@
+/* -*- c++ -*- */
+/* Copyright 2012 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 INCLUDED_DIGITAL_HEADER_PAYLOAD_DEMUX_IMPL_H
+#define INCLUDED_DIGITAL_HEADER_PAYLOAD_DEMUX_IMPL_H
+
+#include <digital/header_payload_demux.h>
+
+namespace gr {
+  namespace digital {
+
+    class header_payload_demux_impl : public header_payload_demux
+    {
+     private:
+      int d_header_len; //! Number of bytes per header
+      int d_items_per_symbol; //! Bytes per symbol
+      int d_gi; //! Bytes per guard interval
+      pmt::pmt_t d_len_tag_key; //! Key of length tag
+      pmt::pmt_t d_trigger_tag_key; //! Key of trigger tag (if used)
+      bool d_output_symbols; //! If true, output is symbols, not items
+      size_t d_itemsize; //! Bytes per item
+      bool d_uses_trigger_tag; //! If a trigger tag is used
+      int d_ninput_items_reqd; //! Helper for forecast()
+      int d_state; //! Current read state
+      int d_remaining_symbols; //! When in payload or header state, the number of symbols still to transmit
+
+      // Helpers to make the state machine more readable
+
+      //! Helper function that does the reading from the msg port
+      bool parse_header_data_msg();
+
+      //! Helper function that returns true if a trigger signal is detected.
+      //  Searches input 1 (if active), then the tags. Sets \p pos to the position
+      //  of the first tag.
+      bool find_trigger_signal(
+	int &pos,
+	int noutput_items,
+	gr_vector_const_void_star &input_items);
+
+      //! Helper function, copies one symbol from in to out and updates all pointers and counters
+      void copy_symbol(const unsigned char *&in, unsigned char *&out, int port, int &nread, int &nproduced);
+
+     public:
+
+      header_payload_demux_impl(
+	  int header_len,
+	  int items_per_symbol,
+	  int guard_interval,
+	  const std::string &length_tag_key,
+	  const std::string &trigger_tag_key,
+	  bool output_symbols,
+	  size_t itemsize);
+      ~header_payload_demux_impl();
+
+      void forecast (int noutput_items, gr_vector_int &ninput_items_required);
+
+      int general_work(int noutput_items,
+		       gr_vector_int &ninput_items,
+		       gr_vector_const_void_star &input_items,
+		       gr_vector_void_star &output_items);
+    };
+
+  } // namespace digital
+} // namespace gr
+
+#endif /* INCLUDED_DIGITAL_HEADER_PAYLOAD_DEMUX_IMPL_H */
+