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/* -*- c++ -*- */
/*
* GNU Radio interface for Pavel Yazev's Project 25 IMBE Encoder/Decoder
*
* Copyright 2009 Pavel Yazev E-mail: pyazev@gmail.com
* Copyright 2009, 2010, 2011, 2012, 2013, 2014 KA1RBI
*
* This 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.
*
* This software 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 this software; 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 <gnuradio/io_signature.h>
#include "vocoder_impl.h"
#include <vector>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
namespace gr {
namespace op25_repeater {
static const int FRAGMENT_SIZE = 864;
vocoder::sptr
vocoder::make(bool encode_flag, bool verbose_flag, int stretch_amt, char* udp_host, int udp_port, bool raw_vectors_flag)
{
return gnuradio::get_initial_sptr
(new vocoder_impl(encode_flag, verbose_flag, stretch_amt, udp_host, udp_port, raw_vectors_flag));
}
//////////////////////////////////////////////////////////////
// enc/dec udp operation
// dec no byte input; short output
// dec yes byte input; null output
// enc no short input; char output
// enc yes short input; null output
#define M_IN(encode_flag, udp_port) (1)
#define M_OUT(encode_flag, udp_port) ((udp_port) ? 0 : 1)
#define S_IN(encode_flag, udp_port) ((encode_flag) ? sizeof(int16_t) : sizeof(uint8_t))
#define S_OUT(encode_flag, udp_port) ((udp_port) ? 0 : ((encode_flag) ? sizeof(uint8_t) : sizeof(int16_t)))
/*
* The private constructor
*/
vocoder_impl::vocoder_impl(bool encode_flag, bool verbose_flag, int stretch_amt, char* udp_host, int udp_port, bool raw_vectors_flag)
: gr::block("vocoder",
gr::io_signature::make (M_IN(encode_flag, udp_port), M_IN(encode_flag, udp_port), S_IN(encode_flag, udp_port)),
gr::io_signature::make (M_OUT(encode_flag, udp_port), M_OUT(encode_flag, udp_port), S_OUT(encode_flag, udp_port))),
output_queue(),
output_queue_decode(),
opt_udp_port(udp_port),
opt_encode_flag(encode_flag),
p1voice_encode(verbose_flag, stretch_amt, udp_host, udp_port, raw_vectors_flag, output_queue),
p1voice_decode(verbose_flag, udp_host, udp_port, output_queue_decode)
{
if (opt_encode_flag)
set_output_multiple(FRAGMENT_SIZE);
}
/*
* Our virtual destructor.
*/
vocoder_impl::~vocoder_impl()
{
}
void
vocoder_impl::forecast(int nof_output_items, gr_vector_int &nof_input_items_reqd)
{
/* When encoding, this block consumes 8000 symbols/s and produces 4800
* samples/s. That's a sampling rate of 5/3 or 1.66667.
*
* When decoding, the block consumes one line of text per voice codeword.
* Each line of text is exactly 32 bytes. It outputs 160 samples for each
* codeword; the ratio is thus 32/160 = 0.2.
*
* Thanks to Matt Mills for catching a bug where this value wasn't set correctly
*/
const size_t nof_inputs = nof_input_items_reqd.size();
const int nof_samples_reqd = (opt_encode_flag) ? (1.66667 * nof_output_items) : (0.2 * nof_output_items);
std::fill(&nof_input_items_reqd[0], &nof_input_items_reqd[nof_inputs], nof_samples_reqd);
}
int
vocoder_impl::general_work_decode (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const char *in = (const char *) input_items[0];
p1voice_decode.rxchar(in, ninput_items[0]);
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each (ninput_items[0]);
uint16_t *out = reinterpret_cast<uint16_t*>(output_items[0]);
const int n = std::min(static_cast<int>(output_queue_decode.size()), noutput_items);
if(0 < n) {
copy(output_queue_decode.begin(), output_queue_decode.begin() + n, out);
output_queue_decode.erase(output_queue_decode.begin(), output_queue_decode.begin() + n);
}
// Tell runtime system how many output items we produced.
return n;
}
int
vocoder_impl::general_work_encode (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const short *in = (const short *) input_items[0];
const int noutput_fragments = noutput_items / FRAGMENT_SIZE;
const int fragments_available = output_queue.size() / FRAGMENT_SIZE;
const int nsamples_consume = std::min(ninput_items[0], std::max(0,(noutput_fragments - fragments_available) * 9 * 160));
if (nsamples_consume > 0) {
p1voice_encode.compress_samp(in, nsamples_consume);
// Tell runtime system how many input items we consumed on
// each input stream.
consume_each (nsamples_consume);
}
if (opt_udp_port > 0) // in udp option, we are a gr sink only
return 0;
uint8_t *out = reinterpret_cast<uint8_t*>(output_items[0]);
const int n = std::min(static_cast<int>(output_queue.size()), noutput_items);
if(0 < n) {
copy(output_queue.begin(), output_queue.begin() + n, out);
output_queue.erase(output_queue.begin(), output_queue.begin() + n);
}
// Tell runtime system how many output items we produced.
return n;
}
int
vocoder_impl::general_work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
if (opt_encode_flag)
return general_work_encode(noutput_items, ninput_items, input_items, output_items);
else
return general_work_decode(noutput_items, ninput_items, input_items, output_items);
}
void
vocoder_impl::set_gain_adjust(float gain_adjust) {
p1voice_encode.set_gain_adjust(gain_adjust);
}
} /* namespace op25_repeater */
} /* namespace gr */
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