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//
// PLLSyncTask.cpp: PLL-based carrier recovery
// Copyright (C) 2022 Gonzalo José Carracedo Carballal
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program. If not, see
// <http://www.gnu.org/licenses/>
//
#include <PLLSyncTask.h>
#include <Suscan/Library.h>
#define SIGDIGGER_COSTAS_BLOCK_LENGTH 4096
PLLSyncTask::PLLSyncTask(
const SUCOMPLEX *data,
SUCOMPLEX *destination,
size_t length,
SUFLOAT bw,
QObject *parent) :
Suscan::CancellableTask(parent)
{
this->origin = data;
this->destination = destination;
this->length = length;
SU_ATTEMPT(su_pll_init(&this->pll, 0, bw));
this->pllInitialized = true;
this->setProgress(0);
this->setStatus("Processing...");
}
bool
PLLSyncTask::work(void)
{
size_t amount = this->length - this->p;
size_t p = this->p;
if (amount > SIGDIGGER_COSTAS_BLOCK_LENGTH)
amount = SIGDIGGER_COSTAS_BLOCK_LENGTH;
while (amount--) {
this->destination[p] = su_pll_track(&this->pll, this->origin[p]);
++p;
}
this->p = p;
this->setStatus("Processing ("
+ QString::number(p)
+ "/"
+ QString::number(this->length)
+ ")...");
this->setProgress(static_cast<qreal>(p) / static_cast<qreal>(this->length));
if (this->p < this->length)
return true;
emit done();
return false;
}
void
PLLSyncTask::cancel(void)
{
emit cancelled();
}
PLLSyncTask::~PLLSyncTask()
{
if (this->pllInitialized)
su_pll_finalize(&this->pll);
}