GNU Radio 3.4.0 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2007 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_GR_OFDM_SAMPLER_H 00024 #define INCLUDED_GR_OFDM_SAMPLER_H 00025 00026 #include <gr_sync_block.h> 00027 00028 class gr_ofdm_sampler; 00029 typedef boost::shared_ptr<gr_ofdm_sampler> gr_ofdm_sampler_sptr; 00030 00031 gr_ofdm_sampler_sptr gr_make_ofdm_sampler (unsigned int fft_length, 00032 unsigned int symbol_length, 00033 unsigned int timeout=1000); 00034 00035 /*! 00036 * \brief does the rest of the OFDM stuff 00037 * \ingroup ofdm_blk 00038 */ 00039 class gr_ofdm_sampler : public gr_block 00040 { 00041 friend gr_ofdm_sampler_sptr gr_make_ofdm_sampler (unsigned int fft_length, 00042 unsigned int symbol_length, 00043 unsigned int timeout); 00044 00045 gr_ofdm_sampler (unsigned int fft_length, 00046 unsigned int symbol_length, 00047 unsigned int timeout); 00048 00049 private: 00050 enum state_t {STATE_NO_SIG, STATE_PREAMBLE, STATE_FRAME}; 00051 00052 state_t d_state; 00053 unsigned int d_timeout_max; 00054 unsigned int d_timeout; 00055 unsigned int d_fft_length; 00056 unsigned int d_symbol_length; 00057 00058 public: 00059 void forecast (int noutput_items, gr_vector_int &ninput_items_required); 00060 00061 int general_work (int noutput_items, 00062 gr_vector_int &ninput_items, 00063 gr_vector_const_void_star &input_items, 00064 gr_vector_void_star &output_items); 00065 }; 00066 00067 #endif