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
27 #include "abstractaudioscopewidget.h"
28 #include "ui_audiospectrum_ui.h"
29 #include "tools/kiss_fftr.h"
32 class AudioSpectrum_UI;
33 class AudioSpectrum : public AbstractAudioScopeWidget {
37 AudioSpectrum(QWidget *parent = 0);
40 // Implemented virtual methods
41 QString widgetName() const;
45 ///// Implemented methods /////
47 QImage renderHUD(uint accelerationFactor);
48 QImage renderAudioScope(uint accelerationFactor, const QVector<int16_t> audioFrame, const int freq, const int num_channels, const int num_samples, const int newData);
49 QImage renderBackground(uint accelerationFactor);
50 bool isHUDDependingOnInput() const;
51 bool isScopeDependingOnInput() const;
52 bool isBackgroundDependingOnInput() const;
53 virtual void readConfig();
56 virtual void handleMouseDrag(const QPoint movement, const RescaleDirection rescaleDirection, const Qt::KeyboardModifiers rescaleModifiers);
59 Ui::AudioSpectrum_UI *ui;
62 QAction *m_aTrackMouse;
66 QVector<float> m_lastFFT;
67 QSemaphore m_lastFFTLock;
69 QVector<float> m_peaks;
70 QVector<float> m_peakMap;
72 /** Contains the plot only; m_scopeRect contains text and widgets as well */
73 QRect m_innerScopeRect;
75 /** Lower bound for the dB value to display */
77 /** Upper bound (max: 0) */
80 /** Maximum frequency (limited by the sampling rate if determined automatically).
81 Stored for the painters. */
83 /** The user has chosen a custom frequency. */
86 #ifdef DEBUG_AUDIOSPEC
93 void slotResetMaxFreq();
97 #endif // AUDIOSPECTRUM_H