2003 -> 2004

[lilypond.git] / lily / midi-def.cc

diff --git a/lily/midi-def.cc b/lily/midi-def.cc
index 2307155ba826342cee66815480e70d1c063b0bb3..234ebeb2aaf6f1cf968e693e81fde8726d47c96b 100644 (file)
--- a/lily/midi-def.cc
+++ b/lily/midi-def.cc
@@ -3,92 +3,49 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+  (c) 1997--2004 Jan Nieuwenhuizen <janneke@gnu.org>
 
 */
 #include <math.h>
 #include "misc.hh"
 #include "midi-def.hh"
-#include "input-translator.hh"
-#include "performer-group-performer.hh"
-#include "assoc-iter.hh"
+#include "performance.hh"
+#include "warn.hh"
+#include "scm-hash.hh"
 
-#include "debug.hh"
-
-// classes, alphasorted
-//     statics
-//     constructors
-//     destructor
-//     routines, alphasorted
-
-// statics Midi_def
-// ugh
-
-int Midi_def::den_i_s = 4;
-int Midi_def::num_i_s = 4;
-
-Midi_def::Midi_def()
+Midi_def::Midi_def ()
 {
-  outfile_str_ = ""; 
-  itrans_p_ = 0;
   // ugh
-  set_tempo (Moment (1, 4), 60 );
-}
-
-Midi_def::Midi_def (Midi_def const& s)
-{
-  whole_seconds_f_ = s.whole_seconds_f_;
-  itrans_p_ = s.itrans_p_ ? new Input_translator (*s.itrans_p_) : 0;
-  outfile_str_ = s.outfile_str_;
-}
-
-Midi_def::~Midi_def()
-{
-  delete itrans_p_;
-}
-
-Real
-Midi_def::duration_to_seconds_f (Moment mom)
-{
-  if ( !mom)
-       return 0;
-  
-  return Moment (whole_seconds_f_) * mom;
-}
-
-Global_translator*
-Midi_def::get_global_translator_p() const
-{
-  return  itrans_p_->get_group_performer_p()->global_l ();
+  set_tempo (Moment (Rational (1, 4)), 60);
 }
 
 int
-Midi_def::get_tempo_i (Moment moment)
-{
-  return Moment (whole_seconds_f_) * Moment (60 ) * moment;
-}
-
-void
-Midi_def::print() const
-{
-#ifndef NPRINT
-  DOUT << "Midi {";
-  DOUT << "4/min: " << Real (60) / ( whole_seconds_f_ * 4 );
-  DOUT << "out: " << outfile_str_;
-  DOUT << "}\n";
-#endif
+Midi_def::get_tempo (Moment one_beat_mom)
+{
+  SCM wis  = ly_symbol2scm ("whole-in-seconds");
+  Moment *w = unsmob_moment (lookup_variable (wis));
+
+  Moment wholes_per_min = Moment (60);
+  if (!w)
+    {
+      programming_error  ("wholes-in-seconds not set.");
+      wholes_per_min /= 4;
+    }
+  else
+    {
+      wholes_per_min /= *w; 
+    }
+  
+  int beats_per_min =  int ((wholes_per_min / one_beat_mom).main_part_);
+  return int (beats_per_min);
 }
 
 void
-Midi_def::set (Input_translator* itrans_p)
+Midi_def::set_tempo (Moment one_beat_mom, int beats_per_minute_i)
 {
-  delete itrans_p_;
-  itrans_p_ = itrans_p;
-}
+  Moment beats_per_second = Moment (beats_per_minute_i) / Moment (60);
 
-void
-Midi_def::set_tempo (Moment moment, int count_per_minute_i)
-{
-  whole_seconds_f_ = Moment (count_per_minute_i) / Moment (60 ) / moment;
+  Moment m = Moment (1)/Moment (beats_per_second * one_beat_mom);
+  set_variable (ly_symbol2scm ("whole-in-seconds"), m.smobbed_copy ());
 }