release: 1.0.1

[lilypond.git] / lily / include / midi-walker.hh

diff --git a/lily/include/midi-walker.hh b/lily/include/midi-walker.hh
index 5bdea63b14d507930f4a864f328ba397eaecf967..3be3395e621f2a75b9530708b4380a0788fdadb5 100644 (file)
--- a/lily/include/midi-walker.hh
+++ b/lily/include/midi-walker.hh
@@ -1,31 +1,48 @@
 /*
   midi-walker.hh -- declare Midi_walker
 
-  (c) 1996,97 Han-Wen Nienhuys, Jan Nieuwenhuizen <jan@digicash.com>
-  */
-
-#ifndef MIDIWALKER_HH
-#define MIDIWALKER_HH
+  (c) 1996,  1997--1998 Han-Wen Nienhuys  <hanwen@cs.uu.nl>
+                 Jan Nieuwenhuizen <janneke@gnu.org>
+ */
 
+#ifndef MIDI_WALKER_HH
+#define MIDI_WALKER_HH
 
+#include "proto.hh"
+#include "plist.hh"
+#include "pcursor.hh"
+#include "pqueue.hh"
 #include "lily-proto.hh"
+#include "moment.hh"
 
-#if 0
-
-/* 
-   sketch. . .
-
-   It would be totally cool to share code with the Engraver hierarchy,
-   but this is very tough i think.
-   
-   */
-
-class Voice_performer_group_performer : public Performer_group_performer {
-
+struct Midi_note_event : PQueue_ent<Moment, Midi_note_off*>
+{
+    bool ignore_b_;
+    Midi_note_event();
 };
 
-#endif
+int compare (Midi_note_event const& left, Midi_note_event const& right);
 
-#endif // MIDIWALKER_HH
+/**
+  walk audio and output midi
+  */
+class Midi_walker : public PCursor<Audio_item*> 
+{
+public:
+    Midi_walker (Audio_staff* audio_staff_l, Midi_track* midi_track_l);
+    ~Midi_walker();
+
+    void process();
+
+private:
+    void do_start_note (Midi_note* note_p);
+    void do_stop_notes (Moment now_mom);
+    void output_event (Moment now_mom, Midi_item* l);
+
+    Midi_track* track_l_;
+    PQueue<Midi_note_event> stop_note_queue;
+    Moment last_mom_;
+};
 
 
+#endif // MIDI_WALKER_HH