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23490a0 Dec 6, 2016
@miek @russss
62 lines (54 sloc) 1.99 KB
/*
* Copyright (C) 2015, Mike Walters <mike@flomp.net>
*
* This file is part of inspectrum.
*
* This program 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QMutexLocker>
#include <string.h>
#include "samplebuffer.h"
template <typename Tin, typename Tout>
SampleBuffer<Tin, Tout>::SampleBuffer(std::shared_ptr<SampleSource<Tin>> src) : src(src)
{
src->subscribe(this);
}
template <typename Tin, typename Tout>
SampleBuffer<Tin, Tout>::~SampleBuffer()
{
src->unsubscribe(this);
}
template <typename Tin, typename Tout>
std::unique_ptr<Tout[]> SampleBuffer<Tin, Tout>::getSamples(off_t start, off_t length)
{
// TODO: base this on the actual history required
auto history = std::min(start, (off_t)256);
auto samples = src->getSamples(start - history, length + history);
if (samples == nullptr)
return nullptr;
std::unique_ptr<Tout[]> temp(new Tout[history + length]);
std::unique_ptr<Tout[]> dest(new Tout[length]);
QMutexLocker ml(&mutex);
work(samples.get(), temp.get(), history + length, start);
memcpy(dest.get(), temp.get() + history, length * sizeof(Tout));
return dest;
}
template <typename Tin, typename Tout>
void SampleBuffer<Tin, Tout>::invalidateEvent()
{
SampleSource<Tout>::invalidate();
}
template class SampleBuffer<std::complex<float>, std::complex<float>>;
template class SampleBuffer<std::complex<float>, float>;
template class SampleBuffer<float, float>;