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/* -*- 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_PACKET_HEADER_OFDM_H
#define INCLUDED_DIGITAL_PACKET_HEADER_OFDM_H
#include <vector>
#include <digital/api.h>
#include <digital/packet_header_default.h>
namespace gr {
namespace digital {
/*!
* \brief Header utility for OFDM signals.
* \ingroup ofdm_blk
*
*/
class DIGITAL_API packet_header_ofdm : public packet_header_default
{
public:
typedef boost::shared_ptr<packet_header_ofdm> sptr;
packet_header_ofdm(
const std::vector<std::vector<int> > &occupied_carriers,
int n_syms,
const std::string &len_tag_key="packet_len",
const std::string &frame_len_tag_key="frame_len",
const std::string &num_tag_key="packet_num",
int bits_per_sym=1);
~packet_header_ofdm();
/* \brief Inverse function to header_formatter().
*
* Does the same as packet_header_default::header_parser(), but
* adds another tag that stores the number of OFDM symbols in the
* packet.
* Note that there is usually no linear connection between the number
* of OFDM symbols and the packet length, because, a packet might
* finish mid-OFDM-symbol.
*/
bool header_parser(
const unsigned char *header,
std::vector<gr_tag_t> &tags);
static sptr make(
const std::vector<std::vector<int> > &occupied_carriers,
int n_syms,
const std::string &len_tag_key="packet_len",
const std::string &frame_len_tag_key="frame_len",
const std::string &num_tag_key="packet_num",
int bits_per_sym=1);
protected:
pmt::pmt_t d_frame_len_tag_key;
const std::vector<std::vector<int> > d_occupied_carriers; //! Which carriers/symbols carry data
int d_syms_per_set; //! Helper variable: Total number of elements in d_occupied_carriers
};
} // namespace digital
} // namespace gr
#endif /* INCLUDED_DIGITAL_PACKET_HEADER_OFDM_H */
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