Rename FluxReader and FluxWriter to FluxSource and FluxSink.

lib/fluxsink/fluxsink.h

@@ -0,0 +1,26 @@
+#ifndef FLUXSINK_H
+#define FLUXSINK_H
+
+class Fluxmap;
+class DataSpec;
+
+class FluxSink
+{
+public:
+    virtual ~FluxSink() {}
+
+private:
+    static std::unique_ptr<FluxSink> createSqliteFluxSink(const std::string& filename);
+    static std::unique_ptr<FluxSink> createHardwareFluxSink(unsigned drive);
+
+public:
+    static std::unique_ptr<FluxSink> create(const DataSpec& spec);
+
+public:
+    virtual void writeFlux(int track, int side, Fluxmap& fluxmap) = 0;
+};
+
+extern void setHardwareFluxSinkDensity(bool high_density);
+
+#endif
+