release: 1.5.21

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

diff --git a/lily/midi-def.cc b/lily/midi-def.cc
index 163105ab3c3906952420337cf2add5198a948056..a0599d107f83b41a21212d460c609f82d226cba9 100644 (file)
--- a/lily/midi-def.cc
+++ b/lily/midi-def.cc
@@ -1,69 +1,65 @@
-//
-// midi-def.cc -- implement midi output
-//
-// source file of the LilyPond music typesetter
-//
-// (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+/*
+  midi-def.cc -- implement Midi_def
 
+  source file of the GNU LilyPond music typesetter
+
+  (c)  1997--2001 Jan Nieuwenhuizen <janneke@gnu.org>
+
+*/
 #include <math.h>
 #include "misc.hh"
 #include "midi-def.hh"
+#include "performance.hh"
 #include "debug.hh"
+#include "scope.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 ()
 {
-    set_tempo( Moment( 1, 4 ), 60 );
-    outfile_str_ = "lelie.midi"; 
+  // ugh
+  set_tempo (Moment (Rational (1, 4)), 60);
 }
 
-Midi_def::Midi_def( Midi_def const& midi_c_r )
+int
+Midi_def::get_tempo_i (Moment one_beat_mom)
 {
-    whole_seconds_f_ = midi_c_r.whole_seconds_f_;
-    outfile_str_ = midi_c_r.outfile_str_;
-}
+  SCM wis  = ly_symbol2scm ("whole-in-seconds");
+  Moment *w = unsmob_moment (scope_p_->scm_elem (wis));
 
-Midi_def::~Midi_def()
-{
+  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);
 }
 
-Real
-Midi_def::duration_to_seconds_f( Moment moment )
+void
+Midi_def::set_tempo (Moment one_beat_mom, int beats_per_minute_i)
 {
-    if (!moment)
-       return 0;
-    
-    return Moment( whole_seconds_f_ ) * moment;
-}
+  Moment beats_per_second = Moment (beats_per_minute_i) / Moment (60);
 
-int
-Midi_def::get_tempo_i( Moment moment )
-{
-    return Moment( whole_seconds_f_ ) * Moment( 60 ) * moment;
+  Moment m = Moment (1)/Moment (beats_per_second * one_beat_mom);
+  scope_p_->set ("whole-in-seconds", m.smobbed_copy ());
 }
 
-void
-Midi_def::print() const
+
+int Midi_def::score_count_i_=0;
+
+int
+Midi_def::get_next_score_count () const
 {
-#ifndef NPRINT
-    mtor << "Midi {4/min: " << Real( 60 ) / ( whole_seconds_f_ * 4 );
-    mtor << "out: " << outfile_str_;
-    mtor << "}\n";
-#endif
+  return score_count_i_++;
 }
 
 void
-Midi_def::set_tempo( Moment moment, int count_per_minute_i )
+Midi_def::reset_score_count ()
 {
-    whole_seconds_f_ = Moment( count_per_minute_i ) / Moment( 60 ) / moment;
+  score_count_i_ = 0;
 }