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/* -*- c++ -*- */
/*
* Copyright 2016 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 "freedv_rx_ss_impl.h"
#include <gnuradio/io_signature.h>
#include <stdexcept>
#include <assert.h>
extern "C" {
void put_next_rx_char(void *callback_state, char c) {
struct freedv_rx_callback_state* pstate;
pstate = (struct freedv_rx_callback_state*) callback_state;
if (pstate->ftxt != NULL) {
//fprintf(pstate->ftxt, "%c\n", c);
}
return;
}
}
namespace gr {
namespace vocoder {
freedv_rx_ss::sptr
freedv_rx_ss::make(int mode, float squelch_thresh)
{
return gnuradio::get_initial_sptr
(new freedv_rx_ss_impl(mode, squelch_thresh));
}
freedv_rx_ss_impl::freedv_rx_ss_impl (int mode, float squelch_thresh)
: gr::block("vocoder_freedv_rx_ss",
io_signature::make(1, 1, sizeof(short)),
io_signature::make(1, 1, sizeof(short))),
d_mode(mode), d_squelch_thresh(squelch_thresh)
{
if((d_freedv = freedv_open(mode)) == NULL)
throw std::runtime_error("freedv_rx_ss_impl: freedv_open failed");
freedv_set_snr_squelch_thresh(d_freedv, d_squelch_thresh);
freedv_set_squelch_en(d_freedv, 0);
freedv_set_callback_txt(d_freedv, put_next_rx_char, NULL, (void *) &d_cb_state);
d_speech_samples = freedv_get_n_speech_samples(d_freedv);
d_max_modem_samples = freedv_get_n_max_modem_samples(d_freedv);
d_nin = freedv_nin(d_freedv);
//set_output_multiple(d_max_modem_samples);
}
freedv_rx_ss_impl::~freedv_rx_ss_impl()
{
int total_bits;
int total_bit_errors;
if (freedv_get_test_frames(d_freedv)) {
total_bits = freedv_get_total_bits(d_freedv);
total_bit_errors = freedv_get_total_bit_errors(d_freedv);
fprintf(stderr, "bits: %d errors: %d BER: %3.2f\n", total_bits, total_bit_errors, (1.0*total_bit_errors)/total_bits);
}
freedv_close(d_freedv);
}
void
freedv_rx_ss_impl::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
unsigned ninputs = ninput_items_required.size();
for(unsigned i = 0; i < ninputs; i++)
ninput_items_required[i] = noutput_items;
}
int
freedv_rx_ss_impl::general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
short *in = (short *) input_items[0];
short *out = (short *) output_items[0];
int i,n;
d_nin = freedv_nin(d_freedv);
if (ninput_items[0] < d_nin) {
consume_each(0);
return(0);
}
for (i=0,n=0; ((n+d_nin) <= noutput_items)&&(i <= ninput_items[0]);) {
d_nout = freedv_rx(d_freedv, out, in);
i += d_nin;
n += d_nout;
out = &(out[d_nout]);
in = &(in[d_nin]);
d_nin = freedv_nin(d_freedv);
}
if ((i > ninput_items[0])||((n+d_nin) > noutput_items)) {
i -= d_nin;
n -= d_nout;
} // back up to where we left off processing freedv_rx
freedv_get_modem_stats(d_freedv, &d_sync, &d_snr_est);
freedv_get_modem_extended_stats(d_freedv, &d_stats);
d_total_bit_errors = freedv_get_total_bit_errors(d_freedv);
consume_each(i);
return(n);
}
void put_next_rx_proto(void *callback_state,char *proto_bits) {
return;
}
void datarx(void *callback_state, unsigned char *packet, size_t size) {
return;
}
void datatx(void *callback_state, unsigned char *packet, size_t *size) {
return;
}
void freedv_rx_ss_impl::set_squelch_thresh(float squelch_thresh)
{
gr::thread::scoped_lock l(d_setlock);
d_squelch_thresh = squelch_thresh;
freedv_set_snr_squelch_thresh(d_freedv, d_squelch_thresh);
}
float freedv_rx_ss_impl::squelch_thresh() {
return(d_squelch_thresh);
}
} /* namespace vocoder */
} /* namespace gr */
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