mirror of
https://github.com/miek/inspectrum.git
synced 2026-03-04 15:34:21 +01:00
40890e46ab
QFile implements cross platform file mapping and removes this dependency entirely. Also simplifies the file size and error to string handling logic.
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
|
|
* Copyright (C) 2015, Mike Walters <mike@flomp.net>
|
|
* Copyright (C) 2015, Jared Boone <jared@sharebrained.com>
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <complex>
|
|
#include <QFile>
|
|
#include "samplesource.h"
|
|
|
|
class SampleAdapter {
|
|
public:
|
|
virtual size_t sampleSize() = 0;
|
|
virtual void copyRange(const void* const src, off_t start, off_t length, std::complex<float>* const dest) = 0;
|
|
};
|
|
|
|
class InputSource : public SampleSource<std::complex<float>>
|
|
{
|
|
private:
|
|
QFile *inputFile = nullptr;
|
|
off_t sampleCount = 0;
|
|
off_t sampleRate = 0;
|
|
uchar *mmapData = nullptr;
|
|
std::unique_ptr<SampleAdapter> sampleAdapter;
|
|
|
|
public:
|
|
InputSource();
|
|
~InputSource();
|
|
void cleanup();
|
|
void openFile(const char *filename);
|
|
std::unique_ptr<std::complex<float>[]> getSamples(off_t start, off_t length);
|
|
off_t count() {
|
|
return sampleCount;
|
|
};
|
|
void setSampleRate(off_t rate);
|
|
off_t rate();
|
|
float relativeBandwidth() {
|
|
return 1;
|
|
}
|
|
};
|