More documentation for burn_source

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2007.10.02.180003"
+#define Cdrskin_timestamP "2007.10.03.084206"

libburn/libburn.h

@@ -336,6 +336,9 @@ struct burn_source {
 	/** Read data from the source. Semantics like with read(2), but MUST
 	    either deliver the full buffer as defined by size or MUST deliver
 	    EOF (return -1) at the following call.
+	    libburn will read a single sector by each call to (*read).
+	    The size of a sector depends on BURN_MODE_*. The known range is
+	    2048 to 2352.
 	*/
 	int (*read)(struct burn_source *, unsigned char *buffer, int size);