diff options
| author | Tom Rondeau <tom@trondeau.com> | 2014-03-25 10:24:35 -0700 |
|---|---|---|
| committer | Tom Rondeau <tom@trondeau.com> | 2014-05-17 17:45:12 -0400 |
| commit | 6f84515d6290230abeea6c13e1c605746a8a272c (patch) | |
| tree | 9886f55646d94d523f94f1fc3a7921b0ce4baf0c /gr-fec/lib/encoder_impl.cc | |
| parent | 8e5eaa8dbe49973bc808dfe4cead2c91b96cb4c6 (diff) | |
fec: Merging fecapi with support for CC code.
Original code taken from next branch of Nick McCarthy's fecapi:
https://github.com/namccart/fecapi.git
Needs: examples, documentation, other tools.
Diffstat (limited to 'gr-fec/lib/encoder_impl.cc')
| -rw-r--r-- | gr-fec/lib/encoder_impl.cc | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gr-fec/lib/encoder_impl.cc b/gr-fec/lib/encoder_impl.cc new file mode 100644 index 0000000000..6a075b4dee --- /dev/null +++ b/gr-fec/lib/encoder_impl.cc @@ -0,0 +1,106 @@ +/* -*- c++ -*- */ +/* + * Copyright 2013-2014 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "encoder_impl.h" +#include <gnuradio/io_signature.h> +#include <stdio.h> + +namespace gr { + namespace fec { + + encoder::sptr + encoder::make(generic_encoder::sptr my_encoder, + size_t input_item_size, + size_t output_item_size) + { + return gnuradio::get_initial_sptr + (new encoder_impl(my_encoder, input_item_size, + output_item_size)); + } + + encoder_impl::encoder_impl(generic_encoder::sptr my_encoder, + size_t input_item_size, + size_t output_item_size) + : block("fec_encoder", + io_signature::make(1, 1, input_item_size), + io_signature::make(1, 1, output_item_size)), + d_input_item_size(input_item_size), + d_output_item_size(output_item_size) + { + set_fixed_rate(true); + set_relative_rate((double)my_encoder->get_output_size()/my_encoder->get_input_size()); + set_output_multiple(my_encoder->get_output_size()); + d_encoder = my_encoder; + } + + encoder_impl::~encoder_impl() + { + } + + int + encoder_impl::fixed_rate_ninput_to_noutput(int ninput) + { + return (int)(((d_encoder->get_output_size()/(double)d_encoder->get_input_size()) * ninput) + .5); + } + + int + encoder_impl::fixed_rate_noutput_to_ninput(int noutput) + { + return (int)(((d_encoder->get_input_size()/(double)d_encoder->get_output_size()) * noutput) + .5); + } + + void + encoder_impl::forecast(int noutput_items, + gr_vector_int& ninput_items_required) + { + ninput_items_required[0] = (int)(((d_encoder->get_input_size()/(double)d_encoder->get_output_size()) * noutput_items) + .5); + } + + int + encoder_impl::general_work(int noutput_items, + gr_vector_int& ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) + { + char *inBuffer = (char*)input_items[0]; + char *outBuffer = (char*)output_items[0]; + + for(int i = 0; i < noutput_items/output_multiple(); ++i) { + //printf("%u inp %u oup\n", d_input_item_size, d_output_item_size); + //printf("%u, %u\n", (i*d_encoder->get_input_size()*d_input_item_size), (i*d_encoder->get_output_size()*d_output_item_size)); + + d_encoder->generic_work((void*)(inBuffer+(i*d_encoder->get_input_size()*d_input_item_size)), + (void*)(outBuffer+(i*d_encoder->get_output_size()*d_output_item_size))); + } + + //printf("%d, %u, %u\n", (int)(((1.0/relative_rate()) * noutput_items) + .5), noutput_items, output_multiple()); + + consume_each((int)(((1.0/relative_rate()) * noutput_items) + .5)); + return noutput_items; + } + + } /* namespace fec */ +} /* namespace gr */ |