@@ -17,12 +17,13 @@ AudioDevice::AudioDevice(QObject* parent)
 	: QIODevice(parent)
 	, m_context(nullptr)
 	, m_drift(0)
+	, m_ratio(1.f)
 {
 	setOpenMode(ReadOnly);
 }
 
 void AudioDevice::setFormat(const QAudioFormat& format) {
-	if (!GBAThreadIsActive(m_context)) {
+	if (!m_context || !GBAThreadIsActive(m_context)) {
 		return;
 	}
 #if RESAMPLE_LIBRARY == RESAMPLE_NN

@@ -48,6 +48,8 @@ }
 
 AudioProcessor::AudioProcessor(QObject* parent)
 	: QObject(parent)
+	, m_context(nullptr)
+	, m_samples(GBA_AUDIO_SAMPLES)
 {
 }
 

@@ -33,6 +33,10 @@ }
 }
 
 void AudioProcessorQt::start() {
+	if (!input()) {
+		return;
+	}
+
 	if (!m_device) {
 		m_device = new AudioDevice(this);
 	}

@@ -22,6 +22,10 @@ GBASDLDeinitAudio(&m_audio);
 }
 
 void AudioProcessorSDL::start() {
+	if (!input()) {
+		return;
+	}
+
 	if (m_audio.thread) {
 		GBASDLResumeAudio(&m_audio);
 	} else {

@@ -32,6 +32,9 @@ DisplayGL::DisplayGL(const QGLFormat& format, QWidget* parent)
 	: Display(parent)
 	, m_painter(new Painter(format, this))
 	, m_started(false)
+	, m_lockAspectRatio(false)
+	, m_filter(false)
+	, m_context(nullptr)
 {
 }
 
@@ -114,7 +117,7 @@ }
 }
 
 void DisplayGL::framePosted(const uint32_t* buffer) {
-	if (buffer) {
+	if (m_started && buffer) {
 		m_painter->setBacking(buffer);
 	}
 }
@@ -128,6 +131,7 @@ : QGLWidget(format, parent)
 	, m_drawTimer(nullptr)
 	, m_lockAspectRatio(false)
 	, m_filter(false)
+	, m_context(nullptr)
 {
 	setMinimumSize(VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
 	m_size = parent->size();

@@ -17,8 +17,7 @@ , m_filter(false)
 {
 }
 
-void DisplayQt::startDrawing(GBAThread* context) {
-	m_context = context;
+void DisplayQt::startDrawing(GBAThread*) {
 }
 
 void DisplayQt::lockAspectRatio(bool lock) {

@@ -35,7 +35,6 @@ protected:
 	virtual void paintEvent(QPaintEvent*) override;
 
 private:
-	GBAThread* m_context;
 	QImage m_backing;
 	bool m_lockAspectRatio;
 	bool m_filter;

@@ -15,6 +15,7 @@
 KeyEditor::KeyEditor(QWidget* parent)
 	: QLineEdit(parent)
 	, m_direction(GamepadAxisEvent::NEUTRAL)
+	, m_button(false)
 {
 	setAlignment(Qt::AlignCenter);
 }

@@ -47,7 +47,6 @@ void triggerState(int slot);
 
 	Ui::LoadSaveState m_ui;
 	GameController* m_controller;
-	InputController* m_inputController;
 	SavestateButton* m_slots[NUM_SLOTS];
 	LoadSave m_mode;
 

@@ -12,6 +12,9 @@ using namespace QGBA;
 
 LogView::LogView(QWidget* parent)
 	: QWidget(parent)
+	, m_logLevel(0)
+	, m_lines(0)
+	, m_lineLimit(DEFAULT_LINE_LIMIT)
 {
 	m_ui.setupUi(this);
 	connect(m_ui.levelDebug, SIGNAL(toggled(bool)), this, SLOT(setLevelDebug(bool)));
@@ -24,8 +27,6 @@ connect(m_ui.levelGameError, SIGNAL(toggled(bool)), this, SLOT(setLevelGameError(bool)));
 	connect(m_ui.levelSWI, SIGNAL(toggled(bool)), this, SLOT(setLevelSWI(bool)));
 	connect(m_ui.clear, SIGNAL(clicked()), this, SLOT(clear()));
 	connect(m_ui.maxLines, SIGNAL(valueChanged(int)), this, SLOT(setMaxLines(int)));
-	m_logLevel = 0;
-	m_lines = 0;
 	m_ui.maxLines->setValue(DEFAULT_LINE_LIMIT);
 }