Race condition.

plugins/samplesource/fcd/fcdinput.cpp

@@ -93,8 +93,8 @@ bool FCDInput::startInput(int device)
 
 	m_deviceDescription = QString("Funcube Dongle");
 
-	if (!applySettings(m_generalSettings, m_settings, true))
-		qCritical("FCD: Unable to set config at start");
+//	if (!applySettings(m_generalSettings, m_settings, true))
+//		qCritical("FCD: Unable to set config at start");
 
 	qDebug("FCDInput: start");
 	return true;

plugins/samplesource/fcd/fcdsource.cpp

@@ -15,6 +15,7 @@
 
 bool FCDThread::OpenSource(const char* cardname)
 {
+	bool fail = false;
 	snd_pcm_hw_params_t* params;
 	//fcd_rate = FCDPP_RATE;
 	//fcd_channels =2;
@@ -28,14 +29,21 @@ bool FCDThread::OpenSource(const char* cardname)
 
 	snd_pcm_hw_params_alloca(&params);
 	if ( snd_pcm_hw_params_any(fcd_handle, params) < 0 )
-		qCritical("Funcube Dongle read settings failed");
-	else if ( snd_pcm_hw_params(fcd_handle, params) < 0 )
-		qCritical("Funcube Dongle write settings failed");
-	// TODO: check actual samplerate, may be crippled firmware
-
-	if ( snd_pcm_start(fcd_handle) < 0 )
+		fail = true;
+	else 	if ( snd_pcm_hw_params(fcd_handle, params) < 0 ) {
+			fail = true;
+			// TODO: check actual samplerate, may be crippled firmware
+		} else {
+			if ( snd_pcm_start(fcd_handle) < 0 )
+				fail = true;
+		}
+	if (fail) {
 		qCritical("Funcube Dongle stream start failed");
-	else	qDebug("Funcube stream started");
+		snd_pcm_close( fcd_handle );
+		return false;
+	} else {
+		qDebug("Funcube stream started");
+	}
 	return true;
 }
 

plugins/samplesource/fcd/fcdthread.cpp

@@ -22,6 +22,7 @@
 
 FCDThread::FCDThread(SampleFifo* sampleFifo, QObject* parent) :
 	QThread(parent),
+	fcd_handle(NULL),
 	m_running(false),
 	m_convertBuffer(BLOCKSIZE),
 	m_sampleFifo(sampleFifo)

plugins/samplesource/fcd/fcdthread.h

@@ -44,7 +44,7 @@ public:
 	int work(int n_items);
 private:
 	snd_pcm_format_t fcd_format;
-	snd_pcm_t* fcd_handle = NULL;
+	snd_pcm_t* fcd_handle;
 
 	QMutex m_startWaitMutex;
 	QWaitCondition m_startWaiter;

plugins/samplesource/v4l/v4linput.cpp

@@ -96,7 +96,7 @@ bool V4LInput::startInput(int device)
 
 	qDebug("V4LInput: start");
 	MsgReportV4L::create(m_gains)->submit(m_guiMessageQueue);
-	applySettings(m_generalSettings, m_settings, true);
+//	applySettings(m_generalSettings, m_settings, true);
 
 	return true;
 }