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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
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
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* Copyright (C) 2015, Mike Walters <mike@flomp.net>
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* Copyright (C) 2015, Jared Boone <jared@sharebrained.com>
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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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#pragma once
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#include <complex>
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#include <QFile>
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#include "samplesource.h"
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class SampleAdapter {
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public:
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virtual size_t sampleSize() = 0;
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virtual void copyRange(const void* const src, size_t start, size_t length, std::complex<float>* const dest) = 0;
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};
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class InputSource : public SampleSource<std::complex<float>>
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{
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private:
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QFile *inputFile = nullptr;
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size_t sampleCount = 0;
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size_t sampleRate = 0;
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uchar *mmapData = nullptr;
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std::unique_ptr<SampleAdapter> sampleAdapter;
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public:
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InputSource();
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~InputSource();
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void cleanup();
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void openFile(const char *filename);
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std::unique_ptr<std::complex<float>[]> getSamples(size_t start, size_t length);
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size_t count() {
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return sampleCount;
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};
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void setSampleRate(size_t rate);
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size_t rate();
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float relativeBandwidth() {
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return 1;
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}
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};
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