Spectrogram:

[kdenlive] / src / audioscopes / audiospectrum.h

diff --git a/src/audioscopes/audiospectrum.h b/src/audioscopes/audiospectrum.h
index 205d120257b733780f4cd826d6c7736bf46074ad..2a92cc4cf128a36cbba304d5297f976038c5bed5 100644 (file)
--- a/src/audioscopes/audiospectrum.h
+++ b/src/audioscopes/audiospectrum.h
@@ -8,32 +8,44 @@
  *   (at your option) any later version.                                   *
  ***************************************************************************/
 
+/**
+   Displays a spectral power distribution of audio samples.
+   The frequency distribution is calculated by means of a Fast Fourier Transformation.
+   For more information see Wikipedia:FFT and the code comments.
+*/
+
 #ifndef AUDIOSPECTRUM_H
 #define AUDIOSPECTRUM_H
 
+// Enables debugging
+//#define DEBUG_AUDIOSPEC
+
 #include <QtCore>
+#include <QVector>
+#include <QHash>
 
 #include "abstractaudioscopewidget.h"
 #include "ui_audiospectrum_ui.h"
 #include "tools/kiss_fftr.h"
+#include "ffttools.h"
 
 class AudioSpectrum_UI;
-
 class AudioSpectrum : public AbstractAudioScopeWidget {
     Q_OBJECT
 
 public:
-    AudioSpectrum(Monitor *projMonitor, Monitor *clipMonitor, QWidget *parent = 0);
+    AudioSpectrum(QWidget *parent = 0);
     ~AudioSpectrum();
 
     // Implemented virtual methods
     QString widgetName() const;
 
+
 protected:
     ///// 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;
@@ -41,25 +53,40 @@ protected:
     virtual void readConfig();
     void writeConfig();
 
+    virtual void handleMouseDrag(const QPoint movement, const RescaleDirection rescaleDirection, const Qt::KeyboardModifiers rescaleModifiers);
+
 private:
     Ui::AudioSpectrum_UI *ui;
-    kiss_fftr_cfg m_cfg;
 
-    QAction *m_aLin;
-    QAction *m_aLog;
-    QActionGroup *m_agScale;
+    QAction *m_aResetHz;
+    QAction *m_aTrackMouse;
+
+    FFTTools m_fftTools;
+    QVector<float> m_lastFFT;
+    QSemaphore m_lastFFTLock;
 
-    QSize m_distance;
+    /** Contains the plot only; m_scopeRect contains text and widgets as well */
+    QRect m_innerScopeRect;
 
     /** Lower bound for the dB value to display */
     int m_dBmin;
     /** Upper bound (max: 0) */
     int m_dBmax;
 
-    uint m_freqMax;
+    /** Maximum frequency (limited by the sampling rate if determined automatically).
+        Stored for the painters. */
+    int m_freqMax;
+    /** The user has chosen a custom frequency. */
+    bool m_customFreq;
+
+#ifdef DEBUG_AUDIOSPEC
+    long m_timeTotal;
+    long m_showTotal;
+#endif
+
 
 private slots:
-    void slotUpdateCfg();
+    void slotResetMaxFreq();
 
 };