GNU Radio 3.5.1 C++ API
digital_ofdm_sampler.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2007,2011 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_DIGITAL_OFDM_SAMPLER_H
00024 #define INCLUDED_DIGITAL_OFDM_SAMPLER_H
00025 
00026 #include <digital_api.h>
00027 #include <gr_sync_block.h>
00028 
00029 class digital_ofdm_sampler;
00030 typedef boost::shared_ptr<digital_ofdm_sampler> digital_ofdm_sampler_sptr;
00031 
00032 DIGITAL_API digital_ofdm_sampler_sptr digital_make_ofdm_sampler (unsigned int fft_length, 
00033                                                      unsigned int symbol_length,
00034                                                      unsigned int timeout=1000);
00035 
00036 /*!
00037  * \brief does the rest of the OFDM stuff
00038  * \ingroup ofdm_blk
00039  */
00040 class DIGITAL_API digital_ofdm_sampler : public gr_block
00041 {
00042   friend DIGITAL_API digital_ofdm_sampler_sptr digital_make_ofdm_sampler (unsigned int fft_length, 
00043                                                               unsigned int symbol_length,
00044                                                               unsigned int timeout);
00045 
00046   digital_ofdm_sampler (unsigned int fft_length, 
00047                         unsigned int symbol_length,
00048                         unsigned int timeout);
00049 
00050  private:
00051   enum state_t {STATE_NO_SIG, STATE_PREAMBLE, STATE_FRAME};
00052 
00053   state_t d_state;
00054   unsigned int d_timeout_max;
00055   unsigned int d_timeout;
00056   unsigned int d_fft_length;
00057   unsigned int d_symbol_length;
00058 
00059  public:
00060   void forecast (int noutput_items, gr_vector_int &ninput_items_required);
00061 
00062   int general_work (int noutput_items,
00063                     gr_vector_int &ninput_items,
00064                     gr_vector_const_void_star &input_items,
00065                     gr_vector_void_star &output_items);
00066 };
00067 
00068 #endif