Rudimentary header implemented in data files

Source/Processors/Channel.cpp

@@ -65,6 +65,6 @@ void Channel::reset()
 
 void Channel::createDefaultName()
 {
-	name = String("Channel ");
+	name = String("CH");
 	name += num;
 }
\ No newline at end of file

Source/Processors/RecordNode.cpp

@@ -223,12 +223,16 @@ void RecordNode::setParameter (int parameterIndex, float newValue)
 
 				File f = File(channelPointers[i]->filename);
 
+				bool fileExists = f.exists();
+
 				channelPointers[i]->file = fopen(channelPointers[i]->filename.toUTF8(), "a+b");
 
-				if (!f.exists())
+				if (!fileExists)
 				{
-					// create header (needs more details, obviously)
-					String header = "THIS IS A HEADER.";
+					// create header
+					String header = generateHeader(channelPointers[i]);
+
+					std::cout << "Header size: " << header.getNumBytesAsUTF8() << std::endl;
 					fwrite(header.toUTF8(), 1, header.getNumBytesAsUTF8(), channelPointers[i]->file);
 				}
 
@@ -271,14 +275,47 @@ void RecordNode::setParameter (int parameterIndex, float newValue)
 
 	 			if (isRecording) {
 	 				std::cout << "OPENING FILE: " << channelPointers[currentChannel]->filename << std::endl;
+	 				
+	 				File f = File(channelPointers[currentChannel]->filename);
+
+	 				bool fileExists = f.exists();
+
 	 				channelPointers[currentChannel]->file = 
 	 					fopen(channelPointers[currentChannel]->filename.toUTF8(), "a+b");
+
+	 				if (!fileExists)
+					{
+						// create header
+						String header = generateHeader(channelPointers[currentChannel]);
+
+						fwrite(header.toUTF8(), 1, header.getNumBytesAsUTF8(), channelPointers[currentChannel]->file);
+					}
+	 			
 	 			}
 	 		}
 		}
  	}
 }
 
+String RecordNode::generateHeader(Channel* ch)
+{
+
+	String header = "header.description = 'OPEN EPHYS DATA FORMAT v0.0;' \n";
+	header += "header.channel = '";
+	header += ch->name;
+	header += "';\n";
+	header += "header.bitVolts = ";
+	header += String(ch->bitVolts);
+	header += ";\n";
+
+	header = header.paddedRight(' ', HEADER_SIZE);
+
+	std::cout << header << std::endl;
+
+	return header;
+
+}
+
 void RecordNode::closeAllFiles()
 {
 

Source/Processors/RecordNode.h

@@ -36,6 +36,8 @@
 #include "GenericProcessor.h"
 #include "Channel.h"
 
+#define HEADER_SIZE 1024
+
 /**
 
   Receives inputs from all processors that want to save their data.
@@ -135,34 +137,18 @@ private:
   */ 
   Time timer;
 
-  /** Holds information for a given channel to be recorded to 
-      its own file.
-  */ 
-  // struct Channel
-  // {
-  //   int nodeId;
-  //   int chan;
-  //   String name;
-  //   bool isRecording;
-  //   String filename;
-  //   FILE* file;
-  // };
-
   /** Closes all open files after recording has finished.
   */ 
   void closeAllFiles();
 
-
+  /** Pointers to all continuous channels */
   Array<Channel*> channelPointers;
-  Array<Channel*> eventChannelPointers;
 
-  /** Map of continuous channels. 
-  */ 
-  //std::map<int, Channel> continuousChannels;
+  /** Pointers to all event channels */
+  Array<Channel*> eventChannelPointers;
 
-  /** Map of event channels. 
-  */ 
-  //std::map<int, std::map<int,Channel> > eventChannels;
+  /** Generates a header for a given channel */
+  String generateHeader(Channel* ch);
 
   /** Method for writing continuous buffers to disk. 
   */