/*
- 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 ());
}