lily/performance.cc

   1 /*
   2   performance.cc -- implement Performance
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2003 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include <time.h>
  10 #include "warn.hh"
  11 #include "string.hh"
  12 #include "string-convert.hh"
  13 #include "main.hh"
  14 #include "midi-def.hh"
  15 #include "midi-item.hh"
  16 #include "midi-stream.hh"
  17 #include "audio-column.hh"
  18 #include "audio-item.hh"
  19 #include "audio-staff.hh"
  20 #include "performance.hh"
  21 #include "score.hh"
  22 #include "input-file-results.hh"
  23 #include "file-path.hh"
  24 #include "lily-version.hh"
  25
  26 #include "killing-cons.tcc"
  27
  28 Performance::Performance ()
  29 {
  30   midi_ =0;
  31   audio_elem_p_list_ = 0;
  32 }
  33
  34
  35 Performance::~Performance ()
  36 {
  37   delete audio_elem_p_list_;
  38 }
  39
  40 void
  41 Performance::output (Midi_stream& midi_stream)
  42 {
  43   int tracks_i = audio_staffs_.size () + 1;
  44
  45   // ugh
  46   int clocks_per_4_i = 384;
  47
  48   midi_stream << Midi_header (1, tracks_i, clocks_per_4_i);
  49   output_header_track (midi_stream);
  50   progress_indication ("\n");
  51   progress_indication (_ ("Track ... "));
  52   int channel = 0;
  53   for (int i =0; i < audio_staffs_.size (); i++)
  54     {
  55       Audio_staff *s = audio_staffs_[i];
  56       if (verbose_global_b)
  57         progress_indication ("[" + to_string (i)) ;
  58
  59       /*
  60         MIDI players tend to ignore instrument settings on
  61         channel 10, the percussion channel by default.
  62        */
  63       if (channel == 9)
  64          channel++;
  65       if (s->channel_ < 0)
  66          s->channel_ = channel;
  67       s->output (midi_stream, channel++);
  68       if (verbose_global_b)
  69         progress_indication ("]");
  70     }
  71 }
  72
  73
  74 void
  75 Performance::output_header_track (Midi_stream& midi_stream)
  76 {
  77   Midi_track midi_track;
  78
  79   midi_track.channel_ = 9;
  80
  81   // perhaps multiple text events?
  82   String id_string;
  83   String str = String (_ ("Creator: "));
  84   id_string = String_convert::pad_to (gnu_lilypond_version_string (), 30);
  85   str += id_string;
  86
  87   /*
  88     This seems silly, but in fact the audio elements should
  89     be generated elsewhere: not midi-specific.
  90    */
  91   Audio_text creator_a (Audio_text::TEXT, str);
  92   Midi_text creator (&creator_a);
  93   midi_track.add (Moment (0), &creator);
  94
  95   /* Better not translate this */
  96   str = "Generated automatically by: ";
  97   str += id_string;
  98
  99   Audio_text generate_a (Audio_text::TEXT, str);
 100   Midi_text generate (&generate_a);
 101   midi_track.add (Moment (0), &generate);
 102
 103   str = _ ("at ");
 104   time_t t (time (0));
 105   str += ctime (&t);
 106   str = str.left_string (str.length () - 1);
 107   str = String_convert::pad_to (str, 60);
 108
 109   Audio_text at_a (Audio_text::TEXT, str);
 110   Midi_text at (&at_a);
 111   midi_track.add (Moment (0), &at);
 112
 113
 114   str = _f ("from musical definition: %s", origin_string_);
 115
 116   Audio_text from_a (Audio_text::TEXT, str);
 117   Midi_text from (&from_a);
 118   midi_track.add (Moment (0), &from);
 119
 120   Audio_text track_name_a (Audio_text::TRACK_NAME, "Track "
 121                            + String_convert::int2dec (0, 0, '0'));
 122   Midi_text track_name (&track_name_a);
 123
 124   midi_track.add (Moment (0), &track_name);
 125
 126   // Some sequencers read track 0 last.
 127   //  Audio_tempo tempo_a (midi_->get_tempo (Moment (Rational (1, 4))));
 128   //  Midi_tempo tempo (&tempo_a);
 129   //  midi_track.add (Moment (0), &tempo);
 130
 131   midi_stream << midi_track;
 132 }
 133
 134 void
 135 Performance::add_element (Audio_element *p)
 136 {
 137   if (Audio_staff*s=dynamic_cast<Audio_staff *> (p))
 138     {
 139       audio_staffs_.push (s);
 140     }
 141   else if (Audio_column *c = dynamic_cast<Audio_column*> (p))
 142     {
 143       c->performance_ = this;
 144     }
 145   audio_elem_p_list_ = new Killing_cons<Audio_element> (p, audio_elem_p_list_);
 146 }
 147
 148
 149 void
 150 Performance::process ()
 151 {
 152   String out = output_name_global;
 153   if (out == "-")
 154     out = "lelie.midi";
 155   int def = midi_->get_next_score_count ();
 156   if (def)
 157     {
 158       Path p = split_path (out);
 159       p.base += "-" + to_string (def);
 160       out = p.to_string ();
 161     }
 162
 163   /* Maybe a bit crude, but we had this before */
 164   Path p = split_path (out);
 165   p.ext = "midi";
 166   out = p.to_string ();
 167
 168   Midi_stream midi_stream (out);
 169   progress_indication (_f ("MIDI output to `%s'...", out));
 170
 171   global_input_file->target_strings_.push (out);
 172
 173   output (midi_stream);
 174   progress_indication ("\n");
 175 }