UI: Add option to use percent instead of dB

UI/adv-audio-control.hpp

@@ -4,6 +4,7 @@
 #include <QWidget>
 #include <QPointer>
 #include <QDoubleSpinBox>
+#include <QStackedWidget>
 #include "balance-slider.hpp"
 
 class QGridLayout;
@@ -12,6 +13,11 @@ class QSpinBox;
 class QCheckBox;
 class QComboBox;
 
+enum class VolumeType {
+	dB,
+	Percent,
+};
+
 class OBSAdvAudioCtrl : public QObject {
 	Q_OBJECT
 
@@ -23,6 +29,8 @@ private:
 	QPointer<QWidget> balanceContainer;
 
 	QPointer<QLabel> nameLabel;
+	QPointer<QStackedWidget> stackedWidget;
+	QPointer<QSpinBox> percent;
 	QPointer<QDoubleSpinBox> volume;
 	QPointer<QCheckBox> forceMono;
 	QPointer<BalanceSlider> balance;
@@ -54,6 +62,8 @@ public:
 	inline obs_source_t *GetSource() const { return source; }
 	void ShowAudioControl(QGridLayout *layout);
 
+	void SetVolumeWidget(VolumeType type);
+
 public slots:
 	void SourceFlagsChanged(uint32_t flags);
 	void SourceVolumeChanged(float volume);
@@ -61,6 +71,7 @@ public slots:
 	void SourceMixersChanged(uint32_t mixers);
 
 	void volumeChanged(double db);
+	void percentChanged(int percent);
 	void downmixMonoChanged(bool checked);
 	void balanceChanged(int val);
 	void syncOffsetChanged(int milliseconds);