When reading from a file, don't try to recalibrate the actual hardware on

error.

lib/reader.cc

@@ -68,6 +68,11 @@ std::unique_ptr<Fluxmap> CapturedReaderTrack::reallyRead()
     return usbRead(side, revolutions);
 }
 
+void CapturedReaderTrack::recalibrate()
+{
+    usbRecalibrate();
+}
+
 std::unique_ptr<Fluxmap> FileReaderTrack::reallyRead()
 {
     if (!indb)
@@ -78,6 +83,9 @@ std::unique_ptr<Fluxmap> FileReaderTrack::reallyRead()
     return sqlReadFlux(indb, track, side);
 }
 
+void FileReaderTrack::recalibrate()
+{}
+
 std::vector<std::unique_ptr<ReaderTrack>> readTracks()
 {
     const DataSpec& dataSpec = source.value;
@@ -193,7 +201,7 @@ void readDiskCommand(
             else
             {
 				std::cout << retry << " retries remaining" << std::endl;
-                usbRecalibrate();
+                track->recalibrate();
             }
 		}
 

lib/reader.h

@@ -16,18 +16,21 @@ public:
 
     std::unique_ptr<Fluxmap> read();
     virtual std::unique_ptr<Fluxmap> reallyRead() = 0;
+    virtual void recalibrate() = 0;
 };
 
 class CapturedReaderTrack : public ReaderTrack
 {
 public:
     std::unique_ptr<Fluxmap> reallyRead();
+    void recalibrate();
 };
 
 class FileReaderTrack : public ReaderTrack
 {
 public:
     std::unique_ptr<Fluxmap> reallyRead();
+    void recalibrate();
 };
 
 extern void setReaderDefaultSource(const std::string& source);