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/* -*- c++ -*- */
/*
* Copyright 2016-2019 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "freedv_rx_ss_impl.h"
#include <gnuradio/io_signature.h>
#include <assert.h>
#include <stdexcept>
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, int interleave_frames)
{
return gnuradio::make_block_sptr<freedv_rx_ss_impl>(
mode, squelch_thresh, interleave_frames);
}
freedv_rx_ss_impl::freedv_rx_ss_impl(int mode,
float squelch_thresh,
int interleave_frames)
: 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),
d_interleave_frames(interleave_frames)
{
#ifdef FREEDV_MODE_700D
if (mode == FREEDV_MODE_700D) {
d_adv.interleave_frames = interleave_frames;
if ((d_freedv = freedv_open_advanced(mode, &d_adv)) == NULL)
throw std::runtime_error("freedv_tx_ss_impl: freedv_open_advanced failed");
} else {
if ((d_freedv = freedv_open(mode)) == NULL)
throw std::runtime_error("freedv_tx_ss_impl: freedv_open failed");
}
#else
if ((d_freedv = freedv_open(mode)) == NULL)
throw std::runtime_error("freedv_rx_ss_impl: freedv_open failed");
#endif
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);
GR_LOG_ERROR(d_logger,
boost::format("bits: %d errors: %d BER: %3.2f") % 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] = std::max(d_nin, 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 in_offset = 0, out_offset = 0;
while ((noutput_items - out_offset) >= d_max_modem_samples &&
(ninput_items[0] - in_offset) >= d_nin) {
d_nout = freedv_rx(d_freedv, out + out_offset, in + in_offset);
out_offset += d_nout;
in_offset += d_nin;
d_nin = freedv_nin(d_freedv);
}
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(in_offset);
return out_offset;
}
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);
}
void freedv_rx_ss_impl::set_squelch_en(bool squelch_enabled)
{
gr::thread::scoped_lock l(d_setlock);
d_squelch_en = squelch_enabled;
if (squelch_enabled)
freedv_set_squelch_en(d_freedv, 1);
else
freedv_set_squelch_en(d_freedv, 0);
}
float freedv_rx_ss_impl::squelch_thresh() { return (d_squelch_thresh); }
} /* namespace vocoder */
} /* namespace gr */
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