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/* -*- c++ -*- */
/*
* Copyright 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 "async_decoder_impl.h"
#include <gnuradio/io_signature.h>
#include <stdio.h>
namespace gr {
namespace fec {
async_decoder::sptr
async_decoder::make(generic_decoder::sptr my_decoder,
size_t input_item_size, size_t output_item_size)
{
return gnuradio::get_initial_sptr
(new async_decoder_impl(my_decoder, input_item_size, output_item_size));
}
async_decoder_impl::async_decoder_impl(generic_decoder::sptr my_decoder,
size_t input_item_size,
size_t output_item_size)
: block("async_decoder",
io_signature::make(0,0,0),
io_signature::make(0,0,0)),
d_input_item_size(input_item_size), d_output_item_size(output_item_size)
{
d_decoder = my_decoder;
message_port_register_in(pmt::mp("pdus"));
message_port_register_out(pmt::mp("pdus"));
set_msg_handler(pmt::mp("pdus"), boost::bind(&async_decoder_impl::decode, this ,_1));
}
async_decoder_impl::~async_decoder_impl()
{
}
void
async_decoder_impl::decode(pmt::pmt_t msg)
{
// extract input pdu
pmt::pmt_t meta(pmt::car(msg));
pmt::pmt_t bits(pmt::cdr(msg));
int nbits = pmt::length(bits);
int blksize_in = d_decoder->get_input_size();
int blksize_out = d_decoder->get_output_size();
int nblocks = nbits/blksize_in;
// nbits sanity check
if(nbits % blksize_in != 0){
throw std::runtime_error((boost::format("nbits_in %% blksize_in != 0 in fec_decoder_asyn! %d bits in, %d blksize") \
% nbits % blksize_in).str());
}
printf("decoder :: blksize_in = %d, blksize_out = %d\n", blksize_in, blksize_out);
pmt::pmt_t outvec(pmt::make_u8vector(blksize_out * nblocks, 0xFF));
printf("decoder :: outvec len = %d (%d blks)\n", blksize_out * nblocks, nblocks);
// get pmt buffer pointers
size_t o0(0);
const float* f32in = pmt::f32vector_elements(bits, o0);
uint8_t* u8out = pmt::u8vector_writable_elements(outvec, o0);
// loop over n fec blocks
for(int i = 0; i < nblocks; i++) {
size_t offset_in = i * blksize_in;
size_t offset_out = i * blksize_out;
// DECODE!
d_decoder->generic_work((void*)&f32in[offset_in], (void*)&u8out[offset_out]);
}
message_port_pub(pmt::mp("pdus"), pmt::cons(meta, outvec));
}
int
async_decoder_impl::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
return noutput_items;
}
} /* namespace fec */
} /* namespace gr */
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