src/midi-output.cc

   1 /*
   2   midi-output.cc -- implement Midi_output
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>, Jan Nieuwehuizen <jan@digicash.com>
   7 */
   8
   9 #include "plist.hh"
  10 #include "debug.hh"
  11 #include "score.hh"
  12 #include "staff.hh"
  13 #include "midi-stream.hh"
  14 #include "midi-def.hh"
  15 #include "midi-output.hh"
  16 #include "midi-walker.hh"
  17 #include "midi-item.hh"
  18 #include "staff-column.hh"
  19 #include "musicalrequest.hh"
  20
  21
  22 Midi_output:: Midi_output(Score* score_l, Midi_def* midi_l )
  23 {
  24     midi_l_ = midi_l;
  25
  26     Midi_stream midi_stream(midi_l->outfile_str_,
  27                             score_l->staffs_.size(),
  28                             384 );
  29 // oeps, not tempo, but clocks per 4 (384 convention)
  30 // must set tempo in tempo request
  31 //                          midi_l->get_tempo_i(Moment(1, 4)));
  32
  33     midi_stream_l_ = &midi_stream;
  34     int track_i=0;
  35
  36     for (iter_top(score_l->staffs_,i); i.ok(); i++) {
  37         do_staff(i, track_i++);
  38     }
  39
  40 }
  41
  42 void
  43 Midi_output::do_staff(Staff*st_l,int track_i)
  44 {
  45     Midi_track midi_track( track_i );
  46     Midi_tempo midi_tempo( midi_l_->get_tempo_i( Moment( 1, 4 ) ) );
  47     midi_track.add( Moment( 0.0 ), &midi_tempo );
  48     for (Midi_walker w (st_l, &midi_track); w.ok(); w++)
  49         w.process_requests();
  50
  51     *midi_stream_l_  << midi_track;
  52 }