Multi device support: access DSPDeviceEngine from the channel plugins using the plubgin API and not a direct access

sdrbase/plugin/pluginapi.cpp

@@ -59,6 +59,16 @@ void PluginAPI::registerSampleSource(const QString& sourceName, PluginInterface*
 	m_pluginManager->registerSampleSource(sourceName, plugin);
 }
 
+void PluginAPI::addThreadedSink(ThreadedSampleSink* sink)
+{
+    m_pluginManager->addThreadedSink(sink);
+}
+
+void PluginAPI::removeThreadedSink(ThreadedSampleSink* sink)
+{
+    m_pluginManager->removeThreadedSink(sink);
+}
+
 PluginAPI::PluginAPI(PluginManager* pluginManager, MainWindow* mainWindow) :
 	QObject(mainWindow),
 	m_pluginManager(pluginManager),

sdrbase/plugin/pluginapi.h

@@ -16,6 +16,7 @@ class AudioFifo;
 class MessageQueue;
 class MainWindow;
 class ChannelMarker;
+class ThreadedSampleSink;
 class PluginGUI;
 
 class SDRANGEL_API PluginAPI : public QObject {
@@ -39,6 +40,10 @@ public:
 	// Sample Source stuff
 	void registerSampleSource(const QString& sourceName, PluginInterface* plugin);
 
+	// Device engine stuff
+	void addThreadedSink(ThreadedSampleSink* sink);
+	void removeThreadedSink(ThreadedSampleSink* sink);
+
 	// R/O access to main window
 	const MainWindow* getMainWindow() const { return m_mainWindow; }
 

sdrbase/plugin/pluginmanager.cpp

@@ -86,6 +86,16 @@ void PluginManager::registerSampleSource(const QString& sourceName, PluginInterf
 	m_sampleSourceRegistrations.append(SampleSourceRegistration(sourceName, plugin));
 }
 
+void PluginManager::addThreadedSink(ThreadedSampleSink* sink)
+{
+    m_dspDeviceEngine->addThreadedSink(sink);
+}
+
+void PluginManager::removeThreadedSink(ThreadedSampleSink* sink)
+{
+    m_dspDeviceEngine->removeThreadedSink(sink);
+}
+
 void PluginManager::loadSettings(const Preset* preset)
 {
 	fprintf(stderr, "PluginManager::loadSettings: Loading preset [%s | %s]\n", qPrintable(preset->getGroup()), qPrintable(preset->getDescription()));

sdrbase/plugin/pluginmanager.h

@@ -15,6 +15,7 @@ class MainWindow;
 class SampleSource;
 class Message;
 class DSPDeviceEngine;
+class ThreadedSampleSink;
 
 class SDRANGEL_API PluginManager : public QObject {
 	Q_OBJECT
@@ -48,6 +49,9 @@ public:
 
 	void registerSampleSource(const QString& sourceName, PluginInterface* plugin);
 
+	void addThreadedSink(ThreadedSampleSink* sink);
+	void removeThreadedSink(ThreadedSampleSink* sink);
+
 	void loadSettings(const Preset* preset);
 	void loadSourceSettings(const Preset* preset);
 	void saveSettings(Preset* preset);