lily/performance.cc

   1 /*
   2   performance.cc -- implement Performance
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2004 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 % 16 == 9)
  64          channel++;
  65
  66
  67       /*
  68         Huh? Why does each staff also have a separate channel? We
  69         should map channels to voices, not staves. --hwn.
  70         */
  71       if (s->channel_ < 0)
  72         {
  73           s->channel_ = channel % 16;
  74           if (channel > 15)
  75             warning ("MIDI channel wrapped around. Remapping modulo 16.");
  76         }
  77
  78       s->output (midi_stream, channel++);
  79       if (verbose_global_b)
  80         progress_indication ("]");
  81     }
  82 }
  83
  84
  85 void
  86 Performance::output_header_track (Midi_stream& midi_stream)
  87 {
  88   Midi_track midi_track;
  89
  90   midi_track.channel_ = 9;
  91
  92   // perhaps multiple text events?
  93   String id_string;
  94   String str = String (_ ("Creator: "));
  95   id_string = String_convert::pad_to (gnu_lilypond_version_string (), 30);
  96   str += id_string;
  97
  98   /*
  99     This seems silly, but in fact the audio elements should
 100     be generated elsewhere: not midi-specific.
 101    */
 102   Audio_text creator_a (Audio_text::TEXT, str);
 103   Midi_text creator (&creator_a);
 104   midi_track.add (Moment (0), &creator);
 105
 106   /* Better not translate this */
 107   str = "Generated automatically by: ";
 108   str += id_string;
 109
 110   Audio_text generate_a (Audio_text::TEXT, str);
 111   Midi_text generate (&generate_a);
 112   midi_track.add (Moment (0), &generate);
 113
 114   str = _ ("at ");
 115   time_t t (time (0));
 116   str += ctime (&t);
 117   str = str.left_string (str.length () - 1);
 118   str = String_convert::pad_to (str, 60);
 119
 120   Audio_text at_a (Audio_text::TEXT, str);
 121   Midi_text at (&at_a);
 122   midi_track.add (Moment (0), &at);
 123
 124
 125   // TODO:
 126   //  str = _f ("from musical definition: %s", origin_string_);
 127
 128   Audio_text from_a (Audio_text::TEXT, str);
 129   Midi_text from (&from_a);
 130   midi_track.add (Moment (0), &from);
 131
 132   Audio_text track_name_a (Audio_text::TRACK_NAME, "Track "
 133                            + String_convert::int2dec (0, 0, '0'));
 134   Midi_text track_name (&track_name_a);
 135
 136   midi_track.add (Moment (0), &track_name);
 137
 138   // Some sequencers read track 0 last.
 139   //  Audio_tempo tempo_a (midi_->get_tempo (Moment (Rational (1, 4))));
 140   //  Midi_tempo tempo (&tempo_a);
 141   //  midi_track.add (Moment (0), &tempo);
 142
 143   midi_stream << midi_track;
 144 }
 145
 146 void
 147 Performance::add_element (Audio_element *p)
 148 {
 149   if (Audio_staff*s=dynamic_cast<Audio_staff *> (p))
 150     {
 151       audio_staffs_.push (s);
 152     }
 153   else if (Audio_column *c = dynamic_cast<Audio_column*> (p))
 154     {
 155       c->performance_ = this;
 156     }
 157   audio_elem_p_list_ = new Killing_cons<Audio_element> (p, audio_elem_p_list_);
 158 }
 159
 160 SCM
 161 Performance::process (String out)
 162 {
 163   if (out == "-")
 164     out = "lelie.midi";
 165
 166   /* Maybe a bit crude, but we had this before */
 167   Path p = split_path (out);
 168   p.ext = "midi";
 169   out = p.to_string ();
 170
 171   Midi_stream midi_stream (out);
 172   progress_indication (_f ("MIDI output to `%s'...", out));
 173
 174   global_input_file->target_strings_.push (out);
 175
 176   output (midi_stream);
 177   progress_indication ("\n");
 178   return SCM_UNDEFINED;
 179 }