Sink plugins: put a serializer and deserializer in the core plugin for server

plugins/samplesink/bladerfoutput/bladerfoutput.cpp

@@ -194,6 +194,33 @@ void BladerfOutput::stop()
     m_running = false;
 }
 
+QByteArray BladerfOutput::serialize() const
+{
+    return m_settings.serialize();
+}
+
+bool BladerfOutput::deserialize(const QByteArray& data)
+{
+    bool success = true;
+
+    if (!m_settings.deserialize(data))
+    {
+        m_settings.resetToDefaults();
+        success = false;
+    }
+
+    MsgConfigureBladerf* message = MsgConfigureBladerf::create(m_settings, true);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureBladerf* messageToGUI = MsgConfigureBladerf::create(m_settings, true);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+
+    return success;
+}
+
 const QString& BladerfOutput::getDeviceDescription() const
 {
 	return m_deviceDescription;
@@ -210,6 +237,21 @@ quint64 BladerfOutput::getCenterFrequency() const
 	return m_settings.m_centerFrequency;
 }
 
+void BladerfOutput::setCenterFrequency(qint64 centerFrequency)
+{
+    BladeRFOutputSettings settings = m_settings;
+    settings.m_centerFrequency = centerFrequency;
+
+    MsgConfigureBladerf* message = MsgConfigureBladerf::create(settings, false);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureBladerf* messageToGUI = MsgConfigureBladerf::create(settings, false);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+}
+
 bool BladerfOutput::handleMessage(const Message& message)
 {
 	if (MsgConfigureBladerf::match(message))

plugins/samplesink/bladerfoutput/bladerfoutput.h

@@ -98,10 +98,14 @@ public:
 	virtual bool start();
 	virtual void stop();
 
+    virtual QByteArray serialize() const;
+    virtual bool deserialize(const QByteArray& data);
+
     virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
 	virtual const QString& getDeviceDescription() const;
 	virtual int getSampleRate() const;
 	virtual quint64 getCenterFrequency() const;
+    virtual void setCenterFrequency(qint64 centerFrequency);
 
 	virtual bool handleMessage(const Message& message);
 

plugins/samplesink/bladerfoutput/bladerfoutputgui.cpp

@@ -127,7 +127,16 @@ bool BladerfOutputGui::deserialize(const QByteArray& data)
 
 bool BladerfOutputGui::handleMessage(const Message& message)
 {
-	if (BladerfOutput::MsgReportBladerf::match(message))
+    if (BladerfOutput::MsgConfigureBladerf::match(message))
+    {
+        const BladerfOutput::MsgConfigureBladerf& cfg = (BladerfOutput::MsgConfigureBladerf&) message;
+        m_settings = cfg.getSettings();
+        blockApplySettings(true);
+        displaySettings();
+        blockApplySettings(false);
+        return true;
+    }
+    else if (BladerfOutput::MsgReportBladerf::match(message))
 	{
 		displaySettings();
 		return true;

plugins/samplesink/filesink/filesinkgui.cpp

@@ -131,7 +131,16 @@ bool FileSinkGui::deserialize(const QByteArray& data)
 
 bool FileSinkGui::handleMessage(const Message& message)
 {
-	if (FileSinkOutput::MsgReportFileSinkGeneration::match(message))
+    if (FileSinkOutput::MsgConfigureFileSink::match(message))
+    {
+        const FileSinkOutput::MsgConfigureFileSink& cfg = (FileSinkOutput::MsgConfigureFileSink&) message;
+        m_settings = cfg.getSettings();
+        blockApplySettings(true);
+        displaySettings();
+        blockApplySettings(false);
+        return true;
+    }
+    else if (FileSinkOutput::MsgReportFileSinkGeneration::match(message))
 	{
 		m_generation = ((FileSinkOutput::MsgReportFileSinkGeneration&)message).getAcquisition();
 		updateWithGeneration();

plugins/samplesink/filesink/filesinkoutput.cpp

@@ -139,6 +139,33 @@ void FileSinkOutput::stop()
     }
 }
 
+QByteArray FileSinkOutput::serialize() const
+{
+    return m_settings.serialize();
+}
+
+bool FileSinkOutput::deserialize(const QByteArray& data)
+{
+    bool success = true;
+
+    if (!m_settings.deserialize(data))
+    {
+        m_settings.resetToDefaults();
+        success = false;
+    }
+
+    MsgConfigureFileSink* message = MsgConfigureFileSink::create(m_settings, true);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureFileSink* messageToGUI = MsgConfigureFileSink::create(m_settings, true);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+
+    return success;
+}
+
 const QString& FileSinkOutput::getDeviceDescription() const
 {
 	return m_deviceDescription;
@@ -154,6 +181,21 @@ quint64 FileSinkOutput::getCenterFrequency() const
 	return m_settings.m_centerFrequency;
 }
 
+void FileSinkOutput::setCenterFrequency(qint64 centerFrequency)
+{
+    FileSinkSettings settings = m_settings;
+    settings.m_centerFrequency = centerFrequency;
+
+    MsgConfigureFileSink* message = MsgConfigureFileSink::create(settings, false);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureFileSink* messageToGUI = MsgConfigureFileSink::create(settings, false);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+}
+
 std::time_t FileSinkOutput::getStartingTimeStamp() const
 {
 	return m_startingTimeStamp;

plugins/samplesink/filesink/filesinkoutput.h

@@ -178,10 +178,14 @@ public:
 	virtual bool start();
 	virtual void stop();
 
+    virtual QByteArray serialize() const;
+    virtual bool deserialize(const QByteArray& data);
+
     virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
 	virtual const QString& getDeviceDescription() const;
 	virtual int getSampleRate() const;
 	virtual quint64 getCenterFrequency() const;
+    virtual void setCenterFrequency(qint64 centerFrequency);
 	std::time_t getStartingTimeStamp() const;
 
 	virtual bool handleMessage(const Message& message);

plugins/samplesink/hackrfoutput/hackrfoutput.cpp

@@ -169,6 +169,33 @@ void HackRFOutput::stop()
 	m_running = false;
 }
 
+QByteArray HackRFOutput::serialize() const
+{
+    return m_settings.serialize();
+}
+
+bool HackRFOutput::deserialize(const QByteArray& data)
+{
+    bool success = true;
+
+    if (!m_settings.deserialize(data))
+    {
+        m_settings.resetToDefaults();
+        success = false;
+    }
+
+    MsgConfigureHackRF* message = MsgConfigureHackRF::create(m_settings, true);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureHackRF* messageToGUI = MsgConfigureHackRF::create(m_settings, true);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+
+    return success;
+}
+
 const QString& HackRFOutput::getDeviceDescription() const
 {
 	return m_deviceDescription;
@@ -185,6 +212,21 @@ quint64 HackRFOutput::getCenterFrequency() const
 	return m_settings.m_centerFrequency;
 }
 
+void HackRFOutput::setCenterFrequency(qint64 centerFrequency)
+{
+    HackRFOutputSettings settings = m_settings;
+    settings.m_centerFrequency = centerFrequency;
+
+    MsgConfigureHackRF* message = MsgConfigureHackRF::create(settings, false);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureHackRF* messageToGUI = MsgConfigureHackRF::create(settings, false);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+}
+
 bool HackRFOutput::handleMessage(const Message& message)
 {
 	if (MsgConfigureHackRF::match(message))

plugins/samplesink/hackrfoutput/hackrfoutput.h

@@ -98,10 +98,14 @@ public:
 	virtual bool start();
 	virtual void stop();
 
+    virtual QByteArray serialize() const;
+    virtual bool deserialize(const QByteArray& data);
+
     virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
 	virtual const QString& getDeviceDescription() const;
 	virtual int getSampleRate() const;
 	virtual quint64 getCenterFrequency() const;
+    virtual void setCenterFrequency(qint64 centerFrequency);
 
 	virtual bool handleMessage(const Message& message);
 

plugins/samplesink/hackrfoutput/hackrfoutputgui.cpp

@@ -131,7 +131,16 @@ void HackRFOutputGui::blockApplySettings(bool block)
 
 bool HackRFOutputGui::handleMessage(const Message& message)
 {
-    if (HackRFOutput::MsgReportHackRF::match(message))
+    if (HackRFOutput::MsgConfigureHackRF::match(message))
+    {
+        const HackRFOutput::MsgConfigureHackRF& cfg = (HackRFOutput::MsgConfigureHackRF&) message;
+        m_settings = cfg.getSettings();
+        blockApplySettings(true);
+        displaySettings();
+        blockApplySettings(false);
+        return true;
+    }
+    else if (HackRFOutput::MsgReportHackRF::match(message))
     {
         displaySettings();
         return true;

plugins/samplesink/limesdroutput/limesdroutput.cpp

@@ -407,6 +407,33 @@ void LimeSDROutput::stop()
     releaseChannel();
 }
 
+QByteArray LimeSDROutput::serialize() const
+{
+    return m_settings.serialize();
+}
+
+bool LimeSDROutput::deserialize(const QByteArray& data)
+{
+    bool success = true;
+
+    if (!m_settings.deserialize(data))
+    {
+        m_settings.resetToDefaults();
+        success = false;
+    }
+
+    MsgConfigureLimeSDR* message = MsgConfigureLimeSDR::create(m_settings, true);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureLimeSDR* messageToGUI = MsgConfigureLimeSDR::create(m_settings, true);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+
+    return success;
+}
+
 const QString& LimeSDROutput::getDeviceDescription() const
 {
     return m_deviceDescription;
@@ -423,6 +450,21 @@ quint64 LimeSDROutput::getCenterFrequency() const
     return m_settings.m_centerFrequency;
 }
 
+void LimeSDROutput::setCenterFrequency(qint64 centerFrequency)
+{
+    LimeSDROutputSettings settings = m_settings;
+    settings.m_centerFrequency = centerFrequency;
+
+    MsgConfigureLimeSDR* message = MsgConfigureLimeSDR::create(settings, false);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureLimeSDR* messageToGUI = MsgConfigureLimeSDR::create(settings, false);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+}
+
 std::size_t LimeSDROutput::getChannelIndex()
 {
     return m_deviceShared.m_channel;

plugins/samplesink/limesdroutput/limesdroutput.h

@@ -192,10 +192,14 @@ public:
     virtual bool start();
     virtual void stop();
 
+    virtual QByteArray serialize() const;
+    virtual bool deserialize(const QByteArray& data);
+
     virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
     virtual const QString& getDeviceDescription() const;
     virtual int getSampleRate() const;
     virtual quint64 getCenterFrequency() const;
+    virtual void setCenterFrequency(qint64 centerFrequency);
 
     virtual bool handleMessage(const Message& message);
 

plugins/samplesink/limesdroutput/limesdroutputgui.cpp

@@ -142,7 +142,16 @@ bool LimeSDROutputGUI::deserialize(const QByteArray& data)
 
 bool LimeSDROutputGUI::handleMessage(const Message& message)
 {
-    if (DeviceLimeSDRShared::MsgReportBuddyChange::match(message))
+    if (LimeSDROutput::MsgConfigureLimeSDR::match(message))
+    {
+        const LimeSDROutput::MsgConfigureLimeSDR& cfg = (LimeSDROutput::MsgConfigureLimeSDR&) message;
+        m_settings = cfg.getSettings();
+        blockApplySettings(true);
+        displaySettings();
+        blockApplySettings(false);
+        return true;
+    }
+    else if (DeviceLimeSDRShared::MsgReportBuddyChange::match(message))
     {
         DeviceLimeSDRShared::MsgReportBuddyChange& report = (DeviceLimeSDRShared::MsgReportBuddyChange&) message;
         m_settings.m_devSampleRate = report.getDevSampleRate();

plugins/samplesink/plutosdroutput/plutosdroutput.cpp

@@ -109,6 +109,33 @@ void PlutoSDROutput::stop()
     m_running = false;
 }
 
+QByteArray PlutoSDROutput::serialize() const
+{
+    return m_settings.serialize();
+}
+
+bool PlutoSDROutput::deserialize(const QByteArray& data)
+{
+    bool success = true;
+
+    if (!m_settings.deserialize(data))
+    {
+        m_settings.resetToDefaults();
+        success = false;
+    }
+
+    MsgConfigurePlutoSDR* message = MsgConfigurePlutoSDR::create(m_settings, true);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigurePlutoSDR* messageToGUI = MsgConfigurePlutoSDR::create(m_settings, true);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+
+    return success;
+}
+
 const QString& PlutoSDROutput::getDeviceDescription() const
 {
     return m_deviceDescription;
@@ -123,6 +150,20 @@ quint64 PlutoSDROutput::getCenterFrequency() const
     return m_settings.m_centerFrequency;
 }
 
+void PlutoSDROutput::setCenterFrequency(qint64 centerFrequency)
+{
+    PlutoSDROutputSettings settings = m_settings;
+    settings.m_centerFrequency = centerFrequency;
+
+    MsgConfigurePlutoSDR* message = MsgConfigurePlutoSDR::create(settings, false);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigurePlutoSDR* messageToGUI = MsgConfigurePlutoSDR::create(settings, false);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+}
 
 bool PlutoSDROutput::handleMessage(const Message& message)
 {

plugins/samplesink/plutosdroutput/plutosdroutput.h

@@ -80,10 +80,14 @@ public:
     virtual bool start();
     virtual void stop();
 
+    virtual QByteArray serialize() const;
+    virtual bool deserialize(const QByteArray& data);
+
     virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
     virtual const QString& getDeviceDescription() const;
     virtual int getSampleRate() const;
     virtual quint64 getCenterFrequency() const;
+    virtual void setCenterFrequency(qint64 centerFrequency);
 
     virtual bool handleMessage(const Message& message);
 

plugins/samplesink/plutosdroutput/plutosdroutputgui.cpp

@@ -131,7 +131,16 @@ bool PlutoSDROutputGUI::deserialize(const QByteArray& data)
 
 bool PlutoSDROutputGUI::handleMessage(const Message& message __attribute__((unused)))
 {
-    if (DevicePlutoSDRShared::MsgCrossReportToBuddy::match(message)) // message from buddy
+    if (PlutoSDROutput::MsgConfigurePlutoSDR::match(message))
+    {
+        const PlutoSDROutput::MsgConfigurePlutoSDR& cfg = (PlutoSDROutput::MsgConfigurePlutoSDR&) message;
+        m_settings = cfg.getSettings();
+        blockApplySettings(true);
+        displaySettings();
+        blockApplySettings(false);
+        return true;
+    }
+    else if (DevicePlutoSDRShared::MsgCrossReportToBuddy::match(message)) // message from buddy
     {
         DevicePlutoSDRShared::MsgCrossReportToBuddy& conf = (DevicePlutoSDRShared::MsgCrossReportToBuddy&) message;
         m_settings.m_devSampleRate = conf.getDevSampleRate();

plugins/samplesink/sdrdaemonsink/sdrdaemonsinkgui.cpp

@@ -171,7 +171,16 @@ bool SDRdaemonSinkGui::deserialize(const QByteArray& data)
 
 bool SDRdaemonSinkGui::handleMessage(const Message& message)
 {
-	if (SDRdaemonSinkOutput::MsgReportSDRdaemonSinkStreamTiming::match(message))
+    if (SDRdaemonSinkOutput::MsgConfigureSDRdaemonSink::match(message))
+    {
+        const SDRdaemonSinkOutput::MsgConfigureSDRdaemonSink& cfg = (SDRdaemonSinkOutput::MsgConfigureSDRdaemonSink&) message;
+        m_settings = cfg.getSettings();
+        blockApplySettings(true);
+        displaySettings();
+        blockApplySettings(false);
+        return true;
+    }
+    else if (SDRdaemonSinkOutput::MsgReportSDRdaemonSinkStreamTiming::match(message))
 	{
 		m_samplesCount = ((SDRdaemonSinkOutput::MsgReportSDRdaemonSinkStreamTiming&)message).getSamplesCount();
 		updateWithStreamTime();

plugins/samplesink/sdrdaemonsink/sdrdaemonsinkoutput.cpp

@@ -105,6 +105,33 @@ void SDRdaemonSinkOutput::stop()
 	}
 }
 
+QByteArray SDRdaemonSinkOutput::serialize() const
+{
+    return m_settings.serialize();
+}
+
+bool SDRdaemonSinkOutput::deserialize(const QByteArray& data)
+{
+    bool success = true;
+
+    if (!m_settings.deserialize(data))
+    {
+        m_settings.resetToDefaults();
+        success = false;
+    }
+
+    MsgConfigureSDRdaemonSink* message = MsgConfigureSDRdaemonSink::create(m_settings, true);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureSDRdaemonSink* messageToGUI = MsgConfigureSDRdaemonSink::create(m_settings, true);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+
+    return success;
+}
+
 const QString& SDRdaemonSinkOutput::getDeviceDescription() const
 {
 	return m_deviceDescription;
@@ -120,6 +147,21 @@ quint64 SDRdaemonSinkOutput::getCenterFrequency() const
 	return m_settings.m_centerFrequency;
 }
 
+void SDRdaemonSinkOutput::setCenterFrequency(qint64 centerFrequency)
+{
+    SDRdaemonSinkSettings settings = m_settings;
+    settings.m_centerFrequency = centerFrequency;
+
+    MsgConfigureSDRdaemonSink* message = MsgConfigureSDRdaemonSink::create(settings, false);
+    m_inputMessageQueue.push(message);
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureSDRdaemonSink* messageToGUI = MsgConfigureSDRdaemonSink::create(settings, false);
+        m_guiMessageQueue->push(messageToGUI);
+    }
+}
+
 std::time_t SDRdaemonSinkOutput::getStartingTimeStamp() const
 {
 	return m_startingTimeStamp;

plugins/samplesink/sdrdaemonsink/sdrdaemonsinkoutput.h

@@ -159,10 +159,14 @@ public:
 	virtual bool start();
 	virtual void stop();
 
+    virtual QByteArray serialize() const;
+    virtual bool deserialize(const QByteArray& data);
+
     virtual void setMessageQueueToGUI(MessageQueue *queue) { m_guiMessageQueue = queue; }
 	virtual const QString& getDeviceDescription() const;
 	virtual int getSampleRate() const;
 	virtual quint64 getCenterFrequency() const;
+    virtual void setCenterFrequency(qint64 centerFrequency);
 	std::time_t getStartingTimeStamp() const;
 
 	virtual bool handleMessage(const Message& message);

sdrbase/device/devicesinkapi.cpp

@@ -256,19 +256,33 @@ void DeviceSinkAPI::loadSinkSettings(const Preset* preset)
     {
         qDebug("DeviceSinkAPI::loadSinkSettings: Loading preset [%s | %s]", qPrintable(preset->getGroup()), qPrintable(preset->getDescription()));
 
-        if(m_sampleSinkPluginInstanceUI != 0)
+        const QByteArray* sinkConfig = preset->findBestDeviceConfig(m_sampleSinkId, m_sampleSinkSerial, m_sampleSinkSequence);
-        {
-            const QByteArray* sourceConfig = preset->findBestDeviceConfig(m_sampleSinkId, m_sampleSinkSerial, m_sampleSinkSequence);
-
-            if (sourceConfig != 0)
-            {
-                qDebug("DeviceSinkAPI::loadSinkSettings: deserializing sink: %s", qPrintable(m_sampleSinkId));
-                m_sampleSinkPluginInstanceUI->deserialize(*sourceConfig);
-            }
-
         qint64 centerFrequency = preset->getCenterFrequency();
+        qDebug("DeviceSinkAPI::loadSinkSettings: center frequency: %llu Hz", centerFrequency);
+
+        if (sinkConfig != 0)
+        {
+            qDebug("DeviceSinkAPI::loadSinkSettings: deserializing sink %s[%d]: %s", qPrintable(m_sampleSinkId), m_sampleSinkSequence, qPrintable(m_sampleSinkSerial));
+
+            if (m_sampleSinkPluginInstanceUI != 0) // GUI flavor
+            {
+                m_sampleSinkPluginInstanceUI->deserialize(*sinkConfig);
                 m_sampleSinkPluginInstanceUI->setCenterFrequency(centerFrequency);
             }
+            else if (m_deviceSinkEngine->getSink() != 0) // Server flavor
+            {
+                m_deviceSinkEngine->getSink()->deserialize(*sinkConfig);
+                m_deviceSinkEngine->getSink()->setCenterFrequency(centerFrequency);
+            }
+            else
+            {
+                qDebug("DeviceSinkAPI::loadSinkSettings: no sink");
+            }
+        }
+        else
+        {
+            qDebug("DeviceSinkAPI::loadSinkSettings: sink %s[%d]: %s not found", qPrintable(m_sampleSinkId), m_sampleSinkSequence, qPrintable(m_sampleSinkSerial));
+        }
     }
 }
 
@@ -280,11 +294,17 @@ void DeviceSinkAPI::saveSinkSettings(Preset* preset)
     }
     else
     {
-        if(m_sampleSinkPluginInstanceUI != NULL)
+        qDebug("DeviceSinkAPI::saveSourceSettings: %s", qPrintable(m_sampleSinkPluginInstanceUI->getName()));
+
+        if (m_sampleSinkPluginInstanceUI != 0) // GUI flavor
         {
-            qDebug("DeviceSinkAPI::saveSourceSettings: %s saved", qPrintable(m_sampleSinkPluginInstanceUI->getName()));
+            preset->addOrUpdateDeviceConfig(m_sampleSinkId, m_sampleSinkSerial, m_sampleSinkSequence, m_deviceSinkEngine->getSink()->serialize());
-            preset->addOrUpdateDeviceConfig(m_sampleSinkId, m_sampleSinkSerial, m_sampleSinkSequence, m_sampleSinkPluginInstanceUI->serialize());
+            preset->setCenterFrequency(m_deviceSinkEngine->getSink()->getCenterFrequency());
-            preset->setCenterFrequency(m_sampleSinkPluginInstanceUI->getCenterFrequency());
+        }
+        else if (m_deviceSinkEngine->getSink() != 0) // Server flavor
+        {
+            preset->addOrUpdateDeviceConfig(m_sampleSinkId, m_sampleSinkSerial, m_sampleSinkSequence, m_deviceSinkEngine->getSink()->serialize());
+            preset->setCenterFrequency(m_deviceSinkEngine->getSink()->getCenterFrequency());
         }
         else
         {

sdrbase/device/devicesourceapi.cpp

@@ -245,26 +245,30 @@ void DeviceSourceAPI::loadSourceSettings(const Preset* preset)
 
         const QByteArray* sourceConfig = preset->findBestDeviceConfig(m_sampleSourceId, m_sampleSourceSerial, m_sampleSourceSequence);
         qint64 centerFrequency = preset->getCenterFrequency();
-        qDebug("DeviceSourceAPI::loadSettings: center frequency: %llu Hz", centerFrequency);
+        qDebug("DeviceSourceAPI::loadSourceSettings: center frequency: %llu Hz", centerFrequency);
 
         if (sourceConfig != 0)
         {
-            qDebug("DeviceSourceAPI::loadSettings: deserializing source %s[%d]: %s", qPrintable(m_sampleSourceId), m_sampleSourceSequence, qPrintable(m_sampleSourceSerial));
+            qDebug("DeviceSourceAPI::loadSourceSettings: deserializing source %s[%d]: %s", qPrintable(m_sampleSourceId), m_sampleSourceSequence, qPrintable(m_sampleSourceSerial));
 
-            if (m_sampleSourcePluginInstanceUI != 0)
+            if (m_sampleSourcePluginInstanceUI != 0) // GUI flavor
             {
                 m_sampleSourcePluginInstanceUI->deserialize(*sourceConfig);
                 m_sampleSourcePluginInstanceUI->setCenterFrequency(centerFrequency);
             }
-            else
+            else if (m_deviceSourceEngine->getSource() != 0) // Server flavor
             {
                 m_deviceSourceEngine->getSource()->deserialize(*sourceConfig);
                 m_deviceSourceEngine->getSource()->setCenterFrequency(centerFrequency);
             }
+            else
+            {
+                qDebug("DeviceSourceAPI::loadSourceSettings: no source");
+            }
         }
         else
         {
-            qDebug("DeviceSourceAPI::loadSettings: source %s[%d]: %s not found", qPrintable(m_sampleSourceId), m_sampleSourceSequence, qPrintable(m_sampleSourceSerial));
+            qDebug("DeviceSourceAPI::loadSourceSettings: source %s[%d]: %s not found", qPrintable(m_sampleSourceId), m_sampleSourceSequence, qPrintable(m_sampleSourceSerial));
         }
     }
     else
@@ -277,18 +281,22 @@ void DeviceSourceAPI::saveSourceSettings(Preset* preset)
 {
     if (preset->isSourcePreset())
     {
-        qDebug("DeviceSourceAPI::saveSourceSettings: %s saved", qPrintable(m_sampleSourcePluginInstanceUI->getName()));
+        qDebug("DeviceSourceAPI::saveSourceSettings: %s", qPrintable(m_sampleSourcePluginInstanceUI->getName()));
 
         if (m_sampleSourcePluginInstanceUI != 0)
         {
             preset->addOrUpdateDeviceConfig(m_sampleSourceId, m_sampleSourceSerial, m_sampleSourceSequence, m_sampleSourcePluginInstanceUI->serialize());
             preset->setCenterFrequency(m_sampleSourcePluginInstanceUI->getCenterFrequency());
         }
-        else
+        else if (m_deviceSourceEngine->getSource() != 0)
         {
             preset->addOrUpdateDeviceConfig(m_sampleSourceId, m_sampleSourceSerial, m_sampleSourceSequence, m_deviceSourceEngine->getSource()->serialize());
             preset->setCenterFrequency(m_deviceSourceEngine->getSource()->getCenterFrequency());
         }
+        else
+        {
+            qDebug("DeviceSourceAPI::saveSourceSettings: no source");
+        }
     }
     else
     {

sdrbase/dsp/devicesamplesink.h

@@ -42,9 +42,13 @@ public:
 	virtual bool start() = 0;
 	virtual void stop() = 0;
 
+    virtual QByteArray serialize() const = 0;
+    virtual bool deserialize(const QByteArray& data) = 0;
+
 	virtual const QString& getDeviceDescription() const = 0;
 	virtual int getSampleRate() const = 0; //!< Sample rate exposed by the sink
 	virtual quint64 getCenterFrequency() const = 0; //!< Center frequency exposed by the sink
+    virtual void setCenterFrequency(qint64 centerFrequency) = 0;
 
 	virtual bool handleMessage(const Message& message) = 0;