#ifndef AUDIOSPECTRUM_H
#define AUDIOSPECTRUM_H
+// Enables debugging
+//#define DEBUG_AUDIOSPEC
+
#include <QtCore>
#include <QVector>
#include <QHash>
///// Implemented methods /////
QRect scopeRect();
QImage renderHUD(uint accelerationFactor);
- QImage renderAudioScope(uint accelerationFactor, const QVector<int16_t> audioFrame, const int freq, const int num_channels, const int num_samples);
+ QImage renderAudioScope(uint accelerationFactor, const QVector<int16_t> audioFrame, const int freq, const int num_channels, const int num_samples, const int newData);
QImage renderBackground(uint accelerationFactor);
bool isHUDDependingOnInput() const;
bool isScopeDependingOnInput() const;
Ui::AudioSpectrum_UI *ui;
QAction *m_aResetHz;
+ QAction *m_aTrackMouse;
FFTTools m_fftTools;
+ QVector<float> m_lastFFT;
+ QSemaphore m_lastFFTLock;
/** Contains the plot only; m_scopeRect contains text and widgets as well */
QRect m_innerScopeRect;
/** The user has chosen a custom frequency. */
bool m_customFreq;
+ /** This is linear interpolation with the special property that it preserves peaks, which is required
+ for e.g. showing correct Decibel values (where the peak values are of interest).
+ Consider f = {0, 100, 0}
+ x = {0.5, 1.5}: With default linear interpolation x0 and x1 would both be mapped to 50.
+ This function maps x1 (the first position after the peak) to 100.
+
+ @param in The source vector containing the data
+ @param targetSize Number of interpolation nodes between ...
+ @param left the left array index in the in-vector and ...
+ @param right the right array index (both inclusive).
+ @param fill If right lies outside of the array bounds (which is perfectly fine here) then this value
+ will be used for filling the missing information.
+ */
+ static const QVector<float> interpolatePeakPreserving(const QVector<float> in, const uint targetSize, uint left = 0, uint right = 0, float fill = 0.0);
+
+#ifdef DEBUG_AUDIOSPEC
+ long m_timeTotal;
+ long m_showTotal;
+#endif
private slots: