diff options
Diffstat (limited to 'gr-digital/lib/ofdm_insert_preamble_impl.cc')
| -rw-r--r-- | gr-digital/lib/ofdm_insert_preamble_impl.cc | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/gr-digital/lib/ofdm_insert_preamble_impl.cc b/gr-digital/lib/ofdm_insert_preamble_impl.cc deleted file mode 100644 index 6dca224d73..0000000000 --- a/gr-digital/lib/ofdm_insert_preamble_impl.cc +++ /dev/null @@ -1,189 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2007,2010-2012 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 this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include "ofdm_insert_preamble_impl.h" -#include <gnuradio/io_signature.h> -#include <iostream> -#include <stdexcept> -#include <string> - -namespace gr { -namespace digital { - -ofdm_insert_preamble::sptr -ofdm_insert_preamble::make(int fft_length, - const std::vector<std::vector<gr_complex>>& preamble) -{ - return gnuradio::get_initial_sptr( - new ofdm_insert_preamble_impl(fft_length, preamble)); -} - -ofdm_insert_preamble_impl::ofdm_insert_preamble_impl( - int fft_length, const std::vector<std::vector<gr_complex>>& preamble) - : block("ofdm_insert_preamble", - io_signature::make2(1, 2, sizeof(gr_complex) * fft_length, sizeof(char)), - io_signature::make2(1, 2, sizeof(gr_complex) * fft_length, sizeof(char))), - d_fft_length(fft_length), - d_state(ST_IDLE), - d_nsymbols_output(0), - d_pending_flag(0), - d_preamble(preamble) -{ - GR_LOG_WARN(d_logger, - "The gr::digital::ofdm_insert_preamble block has been deprecated."); - - // sanity check preamble symbols - for (size_t i = 0; i < d_preamble.size(); i++) { - if (d_preamble[i].size() != (size_t)d_fft_length) - throw std::invalid_argument( - "ofdm_insert_preamble_impl: invalid length for preamble symbol"); - } - - enter_idle(); -} - - -ofdm_insert_preamble_impl::~ofdm_insert_preamble_impl() {} - -void ofdm_insert_preamble_impl::forecast(int noutput_items, - gr_vector_int& ninput_items_required) -{ - ninput_items_required[0] = noutput_items; -} - -int ofdm_insert_preamble_impl::general_work(int noutput_items, - gr_vector_int& ninput_items_v, - gr_vector_const_void_star& input_items, - gr_vector_void_star& output_items) -{ - int ninput_items = ninput_items_v.size() == 2 - ? std::min(ninput_items_v[0], ninput_items_v[1]) - : ninput_items_v[0]; - - const gr_complex* in_sym = (const gr_complex*)input_items[0]; - const unsigned char* in_flag = 0; - - if (input_items.size() == 2) - in_flag = (const unsigned char*)input_items[1]; - - gr_complex* out_sym = (gr_complex*)output_items[0]; - unsigned char* out_flag = 0; - if (output_items.size() == 2) - out_flag = (unsigned char*)output_items[1]; - - int no = 0; // number items output - int ni = 0; // number items read from input - -#define write_out_flag() \ - do { \ - if (out_flag) \ - out_flag[no] = d_pending_flag; \ - d_pending_flag = 0; \ - } while (0) - - while (no < noutput_items && ni < ninput_items) { - switch (d_state) { - case ST_IDLE: - if (in_flag && in_flag[ni] & 0x1) // this is first symbol of new payload - enter_preamble(); - else - ni++; // eat one input symbol - break; - - case ST_PREAMBLE: - assert(!in_flag || in_flag[ni] & 0x1); - if (d_nsymbols_output >= (int)d_preamble.size()) { - // we've output all the preamble - enter_first_payload(); - } else { - memcpy(&out_sym[no * d_fft_length], - &d_preamble[d_nsymbols_output][0], - d_fft_length * sizeof(gr_complex)); - - write_out_flag(); - no++; - d_nsymbols_output++; - } - break; - - case ST_FIRST_PAYLOAD: - // copy first payload symbol from input to output - memcpy(&out_sym[no * d_fft_length], - &in_sym[ni * d_fft_length], - d_fft_length * sizeof(gr_complex)); - - write_out_flag(); - no++; - ni++; - enter_payload(); - break; - - case ST_PAYLOAD: - if (in_flag && in_flag[ni] & 0x1) { // this is first symbol of a new payload - enter_preamble(); - break; - } - - // copy a symbol from input to output - memcpy(&out_sym[no * d_fft_length], - &in_sym[ni * d_fft_length], - d_fft_length * sizeof(gr_complex)); - - write_out_flag(); - no++; - ni++; - break; - - default: - std::cerr - << "ofdm_insert_preamble_impl: (can't happen) invalid state, resetting\n"; - enter_idle(); - } - } - - consume_each(ni); - return no; -} - -void ofdm_insert_preamble_impl::enter_idle() -{ - d_state = ST_IDLE; - d_nsymbols_output = 0; - d_pending_flag = 0; -} - -void ofdm_insert_preamble_impl::enter_preamble() -{ - d_state = ST_PREAMBLE; - d_nsymbols_output = 0; - d_pending_flag = 1; -} - -void ofdm_insert_preamble_impl::enter_first_payload() { d_state = ST_FIRST_PAYLOAD; } - -void ofdm_insert_preamble_impl::enter_payload() { d_state = ST_PAYLOAD; } - -} /* namespace digital */ -} /* namespace gr */ |