Fixed bug in SourceNode stopping acquisition

There was a minor bug in the SourceNode code, which caused it to delay restarting
acquisition for about 1 second after acquisition was stopped. Now acquisition from
the Intan Board can be restarted almost immediately after it finishes.

Builds/Linux/build/savedState.xml

@@ -3,6 +3,8 @@
 <PROCESSORGRAPH>
   <SIGNALCHAIN>
     <PROCESSOR name="Sources/Intan Demo Board" insertionPoint="0"/>
-    <PROCESSOR name="Sinks/LFP Viewer" insertionPoint="1"/>
+    <PROCESSOR name="Filters/Bandpass Filter" insertionPoint="1"/>
+    <PROCESSOR name="Filters/Bandpass Filter" insertionPoint="2"/>
+    <PROCESSOR name="Sinks/LFP Viewer" insertionPoint="3"/>
   </SIGNALCHAIN>
 </PROCESSORGRAPH>

Builds/Linux/build/windowState.xml

 <?xml version="1.0" encoding="UTF-8"?>
 
 <MAINWINDOW>
-  <BOUNDS x="1739" y="52" w="1181" h="831" fullscreen="0"/>
+  <BOUNDS x="1745" y="52" w="1229" h="968" fullscreen="0"/>
 </MAINWINDOW>

Source/Processors/DataThreads/IntanThread.cpp

@@ -94,6 +94,8 @@ bool IntanThread::stopAcquisition()
         unsigned char buf[4097]; // has to be bigger than the on-chip buffer
         ftdi_read_data(&ftdic, buf, sizeof(buf));
         closeUSB();
+    } else {
+        deviceFound = false;
     }
 
     return true;

Source/Processors/FilterNode.cpp

@@ -208,7 +208,7 @@ void FilterNode::process(AudioSampleBuffer &buffer,
 
 	//int nSamps = getNumSamples(midiMessages);
 	//std::cout << nSamples << std::endl;
-    filter->process (nSamples, buffer.getArrayOfChannels());
+    //filter->process (nSamples, buffer.getArrayOfChannels());
 
     //std::cout << "Filter node:" << *buffer.getSampleData(0,0);
 

Source/Processors/SourceNode.cpp

@@ -213,11 +213,13 @@ bool SourceNode::disable() {
 
 void SourceNode::acquisitionStopped()
 {
-	std::cout << "Source node sending signal to UI." << std::endl;
-	UI->disableCallbacks();
-	enabledState(false);
-	GenericEditor* ed = (GenericEditor*) getEditor();
-	viewport->updateVisibleEditors(ed, 4);
+	if (!dataThread->foundInputSource()) {
+		std::cout << "Source node sending signal to UI." << std::endl;
+		UI->disableCallbacks();
+		enabledState(false);
+		GenericEditor* ed = (GenericEditor*) getEditor();
+		viewport->updateVisibleEditors(ed, 4);
+	}
 }