-//
-// midi-def.cc -- implement midi output
-//
-// source file of the GNU LilyPond music typesetter
-//
-// (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+/*
+ midi-def.cc -- implement midi output def functions
-#include <math.h>
-#include "misc.hh"
-#include "midi-def.hh"
-#include "debug.hh"
+ source file of the GNU LilyPond music typesetter
-// classes, alphasorted
-// statics
-// constructors
-// destructor
-// routines, alphasorted
+ (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+*/
-// statics Midi_def
-// ugh
-int Midi_def::den_i_s = 4;
-int Midi_def::num_i_s = 4;
-Midi_def::Midi_def()
-{
- set_tempo( Moment( 1, 4 ), 60 );
- outfile_str_ = "lelie.midi";
-}
-
-Midi_def::Midi_def( Midi_def const& midi_c_r )
-{
- whole_seconds_f_ = midi_c_r.whole_seconds_f_;
- outfile_str_ = midi_c_r.outfile_str_;
-}
-
-Midi_def::~Midi_def()
-{
-}
-
-Real
-Midi_def::duration_to_seconds_f( Moment moment )
-{
- if (!moment)
- return 0;
-
- return Moment( whole_seconds_f_ ) * moment;
-}
+#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));
+
+ Moment wholes_per_min = Moment (60);
+ if (!w)
+ {
+ programming_error ("wholes-in-seconds not set.");
+ wholes_per_min /= 4;
+ }
+ else
+ wholes_per_min /= *w;
+
+ Rational beats_per_min = (wholes_per_min / one_beat_mom).main_part_;
+ return beats_per_min.to_int ();
}
void
-Midi_def::print() const
+set_tempo (Output_def *def,
+ Moment one_beat_mom,
+ int beats_per_minute_i)
{
-#ifndef NPRINT
- mtor << "Midi {4/min: " << Real( 60 ) / ( whole_seconds_f_ * 4 );
- mtor << "out: " << outfile_str_;
- mtor << "}\n";
-#endif
-}
+ 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);
+ def->set_variable (ly_symbol2scm ("whole-in-seconds"), m.smobbed_copy ());
}
+