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--- a/mpd2src/audioreader.h
+++ b/mpd2src/audioreader.h
@@ -32,6 +32,7 @@
     virtual void close() = 0;
 
     virtual bool isblocking() {return false;}
+    virtual bool needswap() {return false;}
     
     // Get pointer to data buffer of specified offset and size.
     virtual const unsigned char *data(size_t cnt, ssize_t &nread) = 0;