UI: Rename 'obs' dir to 'UI'

This is to prevent confusion both when prefixing commits and when
reading the directory structure for the first time.

UI/volume-control.hpp

@@ -0,0 +1,86 @@
+#pragma once
+
+#include <obs.hpp>
+#include <QWidget>
+
+class QPushButton;
+
+class VolumeMeter : public QWidget
+{
+	Q_OBJECT
+	Q_PROPERTY(QColor bkColor READ getBkColor WRITE setBkColor DESIGNABLE true)
+	Q_PROPERTY(QColor magColor READ getMagColor WRITE setMagColor DESIGNABLE true)
+	Q_PROPERTY(QColor peakColor READ getPeakColor WRITE setPeakColor DESIGNABLE true)
+	Q_PROPERTY(QColor peakHoldColor READ getPeakHoldColor WRITE setPeakHoldColor DESIGNABLE true)
+
+private:
+	float mag, peak, peakHold;
+	QColor bkColor, magColor, peakColor, peakHoldColor;
+	QTimer *resetTimer;
+
+public:
+	explicit VolumeMeter(QWidget *parent = 0);
+	void setLevels(float nmag, float npeak, float npeakHold);
+	QColor getBkColor() const;
+	void setBkColor(QColor c);
+	QColor getMagColor() const;
+	void setMagColor(QColor c);
+	QColor getPeakColor() const;
+	void setPeakColor(QColor c);
+	QColor getPeakHoldColor() const;
+	void setPeakHoldColor(QColor c);
+
+protected:
+	void paintEvent(QPaintEvent *event);
+private slots:
+	void resetState();
+};
+
+class QLabel;
+class QSlider;
+class MuteCheckBox;
+
+class VolControl : public QWidget {
+	Q_OBJECT
+
+private:
+	OBSSource source;
+	QLabel          *nameLabel;
+	QLabel          *volLabel;
+	VolumeMeter     *volMeter;
+	QSlider         *slider;
+	MuteCheckBox    *mute;
+	QPushButton     *config = nullptr;
+	float           levelTotal;
+	float           levelCount;
+	obs_fader_t     *obs_fader;
+	obs_volmeter_t  *obs_volmeter;
+
+	static void OBSVolumeChanged(void *param, float db);
+	static void OBSVolumeLevel(void *data, float level, float mag,
+			float peak, float muted);
+	static void OBSVolumeMuted(void *data, calldata_t *calldata);
+
+	void EmitConfigClicked();
+
+private slots:
+	void VolumeChanged();
+	void VolumeMuted(bool muted);
+	void VolumeLevel(float mag, float peak, float peakHold, bool muted);
+
+	void SetMuted(bool checked);
+	void SliderChanged(int vol);
+	void updateText();
+
+signals:
+	void ConfigClicked();
+
+public:
+	VolControl(OBSSource source, bool showConfig = false);
+	~VolControl();
+
+	inline obs_source_t *GetSource() const {return source;}
+
+	QString GetName() const;
+	void SetName(const QString &newName);
+};