(PREAMBLE_LY): add marker, where people

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

diff --git a/lily/midi-def.cc b/lily/midi-def.cc
index 800c1e9cd17169d2b813f583c94f56b20f2e0685..4d712f7ed3b37bc649d36d88d2ca768216ccdf9e 100644 (file)
--- a/lily/midi-def.cc
+++ b/lily/midi-def.cc
@@ -1,94 +1,49 @@
 /*
-  midi-def.cc -- implement Midi_def
+  midi-def.cc -- implement midi output def functions
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
-
+  (c) 1997--2005 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 "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()
-{
-    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;
-}
+#include <math.h>
 
-Global_translator*
-Midi_def::get_global_translator_p() const
-{
-    return  itrans_p_->get_group_performer_p()->global_l();
-}
+#include "misc.hh"
+#include "output-def.hh"
+#include "moment.hh"
+#include "warn.hh"
+#include "scm-hash.hh"
 
 int
-Midi_def::get_tempo_i( Moment moment )
+get_tempo (Output_def *def,
+          Moment one_beat_mom)
 {
-    return Moment( whole_seconds_f_ ) * Moment( 60 ) * moment;
-}
+  SCM wis = ly_symbol2scm ("whole-in-seconds");
+  Moment *w = unsmob_moment (def->lookup_variable (wis));
 
-void
-Midi_def::print() const
-{
-#ifndef NPRINT
-    mtor << "Midi {";
-    mtor << "4/min: " << Real( 60 ) / ( whole_seconds_f_ * 4 );
-    mtor << "out: " << outfile_str_;
-    mtor << "}\n";
-#endif
-}
+  Moment wholes_per_min = Moment (60);
+  if (!w)
+    {
+      programming_error ("wholes-in-seconds not set.");
+      wholes_per_min /= 4;
+    }
+  else
+    {
+      wholes_per_min /= *w;
+    }
 
-void
-Midi_def::set( Input_translator* itrans_p )
-{
-    delete itrans_p_;
-    itrans_p_ = itrans_p;
+  int beats_per_min = int ((wholes_per_min / one_beat_mom).main_part_);
+  return int (beats_per_min);
 }
 
 void
-Midi_def::set_tempo( Moment moment, int count_per_minute_i )
+set_tempo (Output_def *def,
+          Moment one_beat_mom,
+          int beats_per_minute_i)
 {
-    whole_seconds_f_ = Moment( count_per_minute_i ) / Moment( 60 ) / moment;
+  Moment beats_per_second = Moment (beats_per_minute_i) / Moment (60);
+
+  Moment m = Moment (1) / Moment (beats_per_second * one_beat_mom);
+  def->set_variable (ly_symbol2scm ("whole-in-seconds"), m.smobbed_copy ());
 }