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3f5e373ee4
I was having an issue with size of off_t on a multi-gigabit file. This may have been related to long being a signed 32 bits on MSVC. But I think there is good reason to use size_t here in general: https://stackoverflow.com/questions/10634629/what-are-the-usage-differences-between-size-t-and-off-t
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* Copyright (C) 2016, Mike Walters <mike@flomp.net>
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*
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* This file is part of inspectrum.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "tunertransform.h"
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#include <liquid/liquid.h>
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#include "util.h"
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TunerTransform::TunerTransform(std::shared_ptr<SampleSource<std::complex<float>>> src) : SampleBuffer(src), frequency(0), bandwidth(1.), taps{1.0f}
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{
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}
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void TunerTransform::work(void *input, void *output, int count, size_t sampleid)
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{
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auto out = static_cast<std::complex<float>*>(output);
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std::unique_ptr<std::complex<float>[]> temp(new std::complex<float>[count]);
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// Mix down
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nco_crcf mix = nco_crcf_create(LIQUID_NCO);
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nco_crcf_set_phase(mix, fmodf(frequency * sampleid, Tau));
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nco_crcf_set_frequency(mix, frequency);
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nco_crcf_mix_block_down(mix,
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static_cast<std::complex<float>*>(input),
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temp.get(),
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count);
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nco_crcf_destroy(mix);
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// Filter
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firfilt_crcf filter = firfilt_crcf_create(taps.data(), taps.size());
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for (int i = 0; i < count; i++)
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{
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firfilt_crcf_push(filter, temp[i]);
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firfilt_crcf_execute(filter, &out[i]);
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}
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firfilt_crcf_destroy(filter);
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}
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void TunerTransform::setFrequency(float frequency)
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{
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this->frequency = frequency;
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}
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void TunerTransform::setTaps(std::vector<float> taps)
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{
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this->taps = taps;
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}
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float TunerTransform::relativeBandwidth() {
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return bandwidth;
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}
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void TunerTransform::setRelativeBandwith(float bandwidth)
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{
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this->bandwidth = bandwidth;
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}
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