Remove high quality mode from codebase (#7219)

Many, many years ago (93a456c), high quality mode was merely disabled after it was noted that it can be problematic rather than being completely removed. Remove it from the codebase so we can get rid of some code and clean things up a bit.

include/AudioAlsa.h

@@ -84,7 +84,6 @@ public:
 private:
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 	void run() override;
 
 	int setHWParams( const ch_cnt_t _channels, snd_pcm_access_t _access );

include/AudioDevice.h

@@ -89,9 +89,7 @@ public:
 
 	virtual void stopProcessing();
 
-	virtual void applyQualitySettings();
-
-
+	void applyQualitySettings();
 
 protected:
 	// subclasses can re-implement this for being used in conjunction with
@@ -129,8 +127,6 @@ protected:
 		return m_audioEngine;
 	}
 
-	bool hqAudio() const;
-
 	static void stopProcessingThread( QThread * thread );
 
 

include/AudioJack.h

@@ -93,7 +93,6 @@ private:
 
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 
 	void registerPort(AudioPort* port) override;
 	void unregisterPort(AudioPort* port) override;

include/AudioOss.h

@@ -79,7 +79,6 @@ class setupWidget : public gui::AudioDeviceSetupWidget
 private:
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 	void run() override;
 
 	int m_audioFD;

include/AudioPortAudio.h

@@ -109,7 +109,6 @@ public:
 private:
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 
 #ifdef PORTAUDIO_V19
 	static int _process_callback( const void *_inputBuffer, void * _outputBuffer,

include/AudioPulseAudio.h

@@ -88,7 +88,6 @@ public:
 private:
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 	void run() override;
 
 	volatile bool m_quit;

include/AudioSdl.h

@@ -74,7 +74,6 @@ public:
 private:
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 
 	static void sdlAudioCallback( void * _udata, Uint8 * _buf, int _len );
 	void sdlAudioCallback( Uint8 * _buf, int _len );

include/AudioSndio.h

@@ -75,7 +75,6 @@ public:
 private:
 	void startProcessing() override;
 	void stopProcessing() override;
-	void applyQualitySettings() override;
 	void run() override;
 
 	struct sio_hdl *m_hdl;

include/SetupDialog.h

@@ -102,7 +102,6 @@ private slots:
 
 	// Audio settings widget.
 	void audioInterfaceChanged(const QString & driver);
-	void toggleHQAudioDev(bool enabled);
 	void updateBufferSizeWarning(int value);
 	void setBufferSize(int value);
 	void resetBufferSize();
@@ -180,7 +179,6 @@ private:
 	AswMap m_audioIfaceSetupWidgets;
 	trMap m_audioIfaceNames;
 	bool m_NaNHandler;
-	bool m_hqAudioDev;
 	int m_bufferSize;
 	QSlider * m_bufferSizeSlider;
 	QLabel * m_bufferSizeLbl;

include/SongEditor.h

@@ -97,8 +97,6 @@ protected:
 	void mouseReleaseEvent(QMouseEvent * me) override;
 
 private slots:
-	void setHighQuality( bool );
-
 	void setMasterVolume( int new_val );
 	void showMasterVolumeFloat();
 	void updateMasterVolumeFloat( int new_val );