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+//////////////////////////////////////////////////////////////////////
+// soundout.h: interface for the CSoundOut class.
+//
+// History:
+//	2010-09-15  Initial creation MSW
+//	2011-03-27  Initial release
+/////////////////////////////////////////////////////////////////////
+#ifndef SOUNDOUT_H
+#define SOUNDOUT_H
+
+#include <QObject>
+#include <QThread>
+#include <QList>
+#include <QMutex>
+#include <QAudioOutput>
+#include "fractresampler.h"
+#include <alsa/asoundlib.h>
+#include <alsa/mixer.h>
+
+#define OUTQSIZE 16384	//max samples (keep power of 2 for ptr wrap around)
+#define SOUND_WRITEBUFSIZE 8192
+
+class CSoundOut : public QThread
+{
+	Q_OBJECT
+public:
+	explicit CSoundOut(QObject *parent = 0);
+	virtual ~CSoundOut();
+
+	//Exposed functions
+	bool Start(int OutDevIndx, bool StereoOut, double UsrDataRate, bool BlockingMode);	//starts soundcard output
+	void Stop();	//stops soundcard output
+	void PutOutQueue(int numsamples, TYPEREAL* pData );
+	void PutOutQueue(int numsamples, TYPECPX* pData );
+	void ChangeUserDataRate(double UsrDataRate);
+	void SetVolume(qint32 vol);
+	int GetRateError(){return (int)m_PpmError;}
+
+protected:
+	void run();		//implements worker thread loop
+	int m_BlockTime;
+
+private:
+	void GetOutQueue(int numsamples, TYPEMONO16* pData );
+	void GetOutQueue(int numsamples, TYPESTEREO16* pData );
+	void CalcError();
+
+	QList<QAudioDeviceInfo> m_OutDevices;
+	QAudioDeviceInfo  m_OutDeviceInfo;
+	QAudioFormat m_OutAudioFormat;
+	QAudioOutput* m_pAudioOutput;
+	QIODevice* m_pOutput; // ptr to internal soundout IODevice
+	QObject* m_pParent;
+	QMutex m_Mutex;
+	CFractResampler m_OutResampler;
+
+	TYPEMONO16 m_OutQueueMono[OUTQSIZE];
+	TYPESTEREO16 m_OutQueueStereo[OUTQSIZE];
+	bool m_BlockingMode;
+	bool m_ThreadQuit;
+	bool m_Startup;
+	bool m_StereoOut;
+	bool m_UpdateToggle;
+	quint32 m_OutQHead;
+	quint32 m_OutQTail;
+	char m_pData[SOUND_WRITEBUFSIZE];
+	int m_RateUpdateCount;
+	int m_OutQLevel;
+	int m_PpmError;
+	double m_Gain;
+	double m_UserDataRate;
+	double m_OutRatio;
+	double m_RateCorrection;
+	double m_AveOutQLevel;
+};
+#endif // SOUNDOUT_H