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/* -*- 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((uint64_t)my_encoder->get_output_size(),
(uint64_t)my_encoder->get_input_size());
set_output_multiple(my_encoder->get_output_size());
d_encoder = my_encoder;
d_input_size = d_encoder->get_input_size() * d_input_item_size;
d_output_size = d_encoder->get_output_size() * d_output_item_size;
}
encoder_impl::~encoder_impl() {}
int encoder_impl::fixed_rate_ninput_to_noutput(int ninput)
{
return (int)(0.5 + ninput * relative_rate());
}
int encoder_impl::fixed_rate_noutput_to_ninput(int noutput)
{
return (int)(0.5 + noutput / relative_rate());
}
void encoder_impl::forecast(int noutput_items, gr_vector_int& ninput_items_required)
{
ninput_items_required[0] = fixed_rate_noutput_to_ninput(noutput_items);
}
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++) {
d_encoder->generic_work((void*)(inbuffer + (i * d_input_size)),
(void*)(outbuffer + (i * d_output_size)));
}
consume_each(fixed_rate_noutput_to_ninput(noutput_items));
return noutput_items;
}
} /* namespace fec */
} /* namespace gr */
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