AFV initial commit

src/blacksound/sampleprovider/equalizersampleprovider.h

@@ -0,0 +1,41 @@
+#ifndef EQUALIZERSAMPLEPROVIDER_H
+#define EQUALIZERSAMPLEPROVIDER_H
+
+#include "blacksound/blacksoundexport.h"
+#include "blacksound/sampleprovider/sampleprovider.h"
+#include "blacksound/dsp/biquadfilter.h"
+
+#include <QSharedPointer>
+#include <QVector>
+
+enum EqualizerPresets
+{
+    VHFEmulation = 1
+};
+
+class BLACKSOUND_EXPORT EqualizerSampleProvider : public ISampleProvider
+{
+    Q_OBJECT
+
+public:
+    EqualizerSampleProvider(ISampleProvider *sourceProvider, EqualizerPresets preset, QObject *parent = nullptr);
+
+    virtual int readSamples(QVector<qint16> &samples, qint64 count) override;
+
+    void setBypassEffects(bool value) { m_bypass = value; }
+
+    double outputGain() const;
+    void setOutputGain(double outputGain);
+
+private:
+    void setupPreset(EqualizerPresets preset);
+
+    ISampleProvider *m_sourceProvider;
+
+    int m_channels = 1;
+    bool m_bypass = false;
+    double m_outputGain = 1.0;
+    QVector<BiQuadFilter> m_filters;
+};
+
+#endif // EQUALIZERSAMPLEPROVIDER_H