lily/midi-def.cc

   1 /*
   2   midi-def.cc -- implement Midi_def
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
   7
   8 */
   9 #include <math.h>
  10 #include "misc.hh"
  11 #include "midi-def.hh"
  12 #include "translator.hh"
  13 #include "performance.hh"
  14 #include "assoc-iter.hh"
  15 #include "score-performer.hh"
  16 #include "debug.hh"
  17
  18 // classes, alphasorted
  19 //     statics
  20 //     constructors
  21 //     destructor
  22 //     routines, alphasorted
  23
  24 Midi_def::Midi_def()
  25 {
  26   outfile_str_ = "";
  27   // ugh
  28   set_tempo (Moment (1, 4), 60);
  29 }
  30
  31 Midi_def::Midi_def (Midi_def const& s)
  32   : Music_output_def (s)
  33 {
  34   whole_seconds_f_ = s.whole_seconds_f_;
  35   outfile_str_ = s.outfile_str_;
  36 }
  37
  38 Midi_def::~Midi_def()
  39 {
  40 }
  41
  42 Real
  43 Midi_def::duration_to_seconds_f (Moment mom)
  44 {
  45   if (!mom)
  46         return 0;
  47
  48   return Moment (whole_seconds_f_) * mom;
  49 }
  50
  51
  52
  53 int
  54 Midi_def::get_tempo_i (Moment moment)
  55 {
  56   return Moment (whole_seconds_f_) * Moment (60) * moment;
  57 }
  58
  59 void
  60 Midi_def::print() const
  61 {
  62 #ifndef NPRINT
  63   DOUT << "Midi {";
  64   DOUT << "4/min: " << Real (60) / (whole_seconds_f_ * 4);
  65   DOUT << "out: " << outfile_str_;
  66   DOUT << "}\n";
  67 #endif
  68 }
  69
  70
  71 void
  72 Midi_def::set_tempo (Moment moment, int count_per_minute_i)
  73 {
  74   whole_seconds_f_ = Moment (count_per_minute_i) / Moment (60) / moment;
  75 }
  76
  77 IMPLEMENT_IS_TYPE_B1( Midi_def, Music_output_def);