Merge branch 'master' into nested-bookparts

[lilypond.git] / scm / midi.scm

diff --git a/scm/midi.scm b/scm/midi.scm
index 4180f1b517d294ce135e994c4d61ff0cd1fcd030..cf43d3af7592759e5f5887812a1b6f2667665ce1 100644 (file)
--- a/scm/midi.scm
+++ b/scm/midi.scm
@@ -2,7 +2,7 @@
 ;;;;
 ;;;;  source file of the GNU LilyPond music typesetter
 ;;;; 
-;;;; (c) 2000--2005 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; (c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>
 
 
 
@@ -276,4 +276,25 @@ returns the program of the instrument
 
 (define-public (alterations-in-key pitch-list)
   "Count number of sharps minus number of flats"
-  (/ (apply + (map cdr pitch-list)) 2))
+  
+  (* (apply + (map cdr pitch-list)) 2))
+
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+
+(define-public (write-performances-midis performances basename . rest)
+  (let ((midi-ext (ly:get-option 'midi-extension)))
+  (let
+      loop
+    ((perfs performances)
+     (count (if (null? rest) 0 (car rest))))
+    (if (pair?  perfs)
+       (begin
+         (ly:performance-write
+          (car perfs)
+          (if (> count 0)
+              (format #f "~a-~a.~a" basename count midi-ext)
+              (format #f "~a.~a" basename midi-ext)))
+         (loop (cdr perfs) (1+ count))))))