Bastian Bloessl
98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
/*
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* Copyright (C) 2013 Bastian Bloessl <bloessl@ccs-labs.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "chunks_to_symbols_impl.h"
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#include "utils.h"
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#include <gnuradio/io_signature.h>
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#include <gnuradio/tag_checker.h>
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#include <assert.h>
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using namespace gr::ieee802_11;
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chunks_to_symbols::sptr chunks_to_symbols::make()
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{
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return gnuradio::get_initial_sptr(new chunks_to_symbols_impl());
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}
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chunks_to_symbols_impl::chunks_to_symbols_impl()
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: tagged_stream_block("chunks_to_symbols",
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io_signature::make(1, 1, sizeof(char)),
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io_signature::make(1, 1, sizeof(gr_complex)),
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"packet_len")
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{
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d_bpsk = constellation_bpsk::make();
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d_qpsk = constellation_qpsk::make();
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d_16qam = constellation_16qam::make();
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d_64qam = constellation_64qam::make();
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d_mapping = d_bpsk;
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}
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chunks_to_symbols_impl::~chunks_to_symbols_impl() {}
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int chunks_to_symbols_impl::work(int noutput_items,
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gr_vector_int& ninput_items,
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gr_vector_const_void_star& input_items,
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gr_vector_void_star& output_items)
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{
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const unsigned char* in = (unsigned char*)input_items[0];
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gr_complex* out = (gr_complex*)output_items[0];
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std::vector<tag_t> tags;
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get_tags_in_range(
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tags, 0, nitems_read(0), nitems_read(0) + ninput_items[0], pmt::mp("encoding"));
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if (tags.size() != 1) {
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throw std::runtime_error("no encoding in input stream");
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}
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Encoding encoding = (Encoding)pmt::to_long(tags[0].value);
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switch (encoding) {
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case BPSK_1_2:
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case BPSK_3_4:
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d_mapping = d_bpsk;
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break;
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case QPSK_1_2:
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case QPSK_3_4:
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d_mapping = d_qpsk;
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break;
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case QAM16_1_2:
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case QAM16_3_4:
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d_mapping = d_16qam;
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break;
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case QAM64_2_3:
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case QAM64_3_4:
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d_mapping = d_64qam;
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break;
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default:
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throw std::invalid_argument("wrong encoding");
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break;
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}
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for (int i = 0; i < ninput_items[0]; i++) {
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d_mapping->map_to_points(in[i], out + i);
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}
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return ninput_items[0];
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}
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