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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
110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
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* Copyright (C) 2015, 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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#pragma once
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#include <QCache>
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#include <QWidget>
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#include "fft.h"
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#include "inputsource.h"
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#include "plot.h"
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#include "tuner.h"
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#include "tunertransform.h"
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#include <memory>
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#include <array>
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#include <math.h>
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class TileCacheKey;
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class SpectrogramPlot : public Plot
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{
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Q_OBJECT
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public:
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SpectrogramPlot(std::shared_ptr<SampleSource<std::complex<float>>> src);
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void invalidateEvent() override;
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std::shared_ptr<AbstractSampleSource> output() override;
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void paintFront(QPainter &painter, QRect &rect, range_t<size_t> sampleRange) override;
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void paintMid(QPainter &painter, QRect &rect, range_t<size_t> sampleRange) override;
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bool mouseEvent(QEvent::Type type, QMouseEvent event) override;
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std::shared_ptr<SampleSource<std::complex<float>>> input() { return inputSource; };
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void setSampleRate(size_t sampleRate);
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bool tunerEnabled();
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void enableScales(bool enabled);
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public slots:
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void setFFTSize(int size);
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void setPowerMax(int power);
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void setPowerMin(int power);
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void setZoomLevel(int zoom);
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void tunerMoved();
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private:
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const int linesPerGraduation = 50;
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static const int tileSize = 65536; // This must be a multiple of the maximum FFT size
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std::shared_ptr<SampleSource<std::complex<float>>> inputSource;
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std::unique_ptr<FFT> fft;
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std::unique_ptr<float[]> window;
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QCache<TileCacheKey, QPixmap> pixmapCache;
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QCache<TileCacheKey, std::array<float, tileSize>> fftCache;
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uint colormap[256];
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int fftSize;
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int zoomLevel;
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float powerMax;
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float powerMin;
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size_t sampleRate;
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bool frequencyScaleEnabled;
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Tuner tuner;
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std::shared_ptr<TunerTransform> tunerTransform;
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QPixmap* getPixmapTile(size_t tile);
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float* getFFTTile(size_t tile);
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void getLine(float *dest, size_t sample);
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int getStride();
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float getTunerPhaseInc();
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std::vector<float> getTunerTaps();
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int linesPerTile();
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void paintFrequencyScale(QPainter &painter, QRect &rect);
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};
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class TileCacheKey
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{
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public:
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TileCacheKey(int fftSize, int zoomLevel, size_t sample) {
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this->fftSize = fftSize;
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this->zoomLevel = zoomLevel;
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this->sample = sample;
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}
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bool operator==(const TileCacheKey &k2) const {
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return (this->fftSize == k2.fftSize) &&
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(this->zoomLevel == k2.zoomLevel) &&
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(this->sample == k2.sample);
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}
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int fftSize;
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int zoomLevel;
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size_t sample;
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};
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