1 /***************************************************************************
2 * Copyright (C) 2010 by Simon Andreas Eugster (simon.eu@gmail.com) *
3 * This file is part of kdenlive. See www.kdenlive.org. *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 ***************************************************************************/
12 Displays a spectral power distribution of audio samples.
13 The frequency distribution is calculated by means of a Fast Fourier Transformation.
14 For more information see Wikipedia:FFT and the code comments.
17 #ifndef AUDIOSPECTRUM_H
18 #define AUDIOSPECTRUM_H
21 //#define DEBUG_AUDIOSPEC
23 // Show overmodulation
24 #define DETECT_OVERMODULATION
30 #include "abstractaudioscopewidget.h"
31 #include "ui_audiospectrum_ui.h"
32 #include "lib/external/kiss_fft/tools/kiss_fftr.h"
33 #include "lib/audio/fftTools.h"
35 class AudioSpectrum_UI;
36 class AudioSpectrum : public AbstractAudioScopeWidget {
40 AudioSpectrum(QWidget *parent = 0);
43 // Implemented virtual methods
44 QString widgetName() const;
48 ///// Implemented methods /////
50 QImage renderHUD(uint accelerationFactor);
51 QImage renderAudioScope(uint accelerationFactor, const QVector<int16_t> audioFrame, const int freq, const int num_channels, const int num_samples, const int newData);
52 QImage renderBackground(uint accelerationFactor);
53 bool isHUDDependingOnInput() const;
54 bool isScopeDependingOnInput() const;
55 bool isBackgroundDependingOnInput() const;
56 virtual void readConfig();
59 virtual void handleMouseDrag(const QPoint &movement, const RescaleDirection rescaleDirection, const Qt::KeyboardModifiers rescaleModifiers);
62 Ui::AudioSpectrum_UI *ui;
65 QAction *m_aTrackMouse;
69 QVector<float> m_lastFFT;
70 QSemaphore m_lastFFTLock;
72 QVector<float> m_peaks;
73 QVector<float> m_peakMap;
75 /** Contains the plot only; m_scopeRect contains text and widgets as well */
76 QRect m_innerScopeRect;
78 /** Lower bound for the dB value to display */
80 /** Upper bound (max: 0) */
83 /** Maximum frequency (limited by the sampling rate if determined automatically).
84 Stored for the painters. */
86 /** The user has chosen a custom frequency. */
91 #ifdef DEBUG_AUDIOSPEC
98 void slotResetMaxFreq();
102 #endif // AUDIOSPECTRUM_H