lily/performance.cc

   1 /*
   2   performance.cc -- implement Performance
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2001 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include <time.h>
  10 #include "debug.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 "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_l_ =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_staff_l_arr_.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_staff_l_arr_.size (); i++)
  54     {
  55       Audio_staff *s = audio_staff_l_arr_[i];
  56       if (verbose_global_b)
  57         progress_indication ("[" + to_str (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_i_ < 0)
  66          s->channel_i_ = 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_i_ = 9;
  80
  81   // perhaps multiple text events?
  82   String id_str;
  83   String str = String (_ ("Creator: "));
  84   id_str = String_convert::pad_to (gnu_lilypond_version_str (), 40);
  85   str += id_str;
  86   str += "\n";
  87
  88   /*
  89     This seems silly, but in fact the audio elements should
  90     be generated elsewhere: not midi-specific.
  91    */
  92   Audio_text creator_a (Audio_text::TEXT, str);
  93   Midi_text creator (&creator_a);
  94   midi_track.add (Moment (0), &creator);
  95
  96   /* Better not translate this */
  97   str = "Generated automatically by: ";
  98   str += id_str;
  99   str += _ (", at ");
 100   time_t t (time (0));
 101   str += ctime (&t);
 102   str = str.left_str (str.length_i () - 1);
 103
 104   /*
 105     Pad out time stamps to 120 chars.  */
 106
 107   str = String_convert::pad_to (str, 120);
 108
 109   Audio_text generate_a (Audio_text::TEXT, str);
 110   Midi_text generate (&generate_a);
 111   midi_track.add (Moment (0), &generate);
 112
 113   str = _f ("from musical definition: %s", origin_str_);
 114
 115   Audio_text from_a (Audio_text::TEXT, str);
 116   Midi_text from (&from_a);
 117   midi_track.add (Moment (0), &from);
 118
 119   Audio_text track_name_a (Audio_text::TRACK_NAME, "Track "
 120                            + String_convert::i2dec_str (0, 0, '0'));
 121   Midi_text track_name (&track_name_a);
 122
 123   midi_track.add (Moment (0), &track_name);
 124
 125   // Some sequencers read track 0 last.
 126   //  Audio_tempo tempo_a (midi_l_->get_tempo_i (Moment (Rational (1, 4))));
 127   //  Midi_tempo tempo (&tempo_a);
 128   //  midi_track.add (Moment (0), &tempo);
 129
 130   midi_stream << midi_track;
 131 }
 132
 133 void
 134 Performance::add_element (Audio_element *p)
 135 {
 136   if (Audio_staff*s=dynamic_cast<Audio_staff *> (p))
 137     {
 138       audio_staff_l_arr_.push (s);
 139     }
 140   else if (Audio_column *c = dynamic_cast<Audio_column*> (p))
 141     {
 142       c->performance_l_ = this;
 143     }
 144   audio_elem_p_list_ = new Killing_cons<Audio_element> (p, audio_elem_p_list_);
 145 }
 146
 147
 148 void
 149 Performance::process ()
 150 {
 151   String out = output_name_global;
 152   if (out == "-")
 153     out = "lelie.midi";
 154   int def = midi_l_->get_next_score_count ();
 155   if (def)
 156     {
 157       Path p = split_path (out);
 158       p.base += "-" + to_str (def);
 159       out = p.str ();
 160     }
 161
 162   /* Maybe a bit crude, but we had this before */
 163   Path p = split_path (out);
 164   p.ext = "midi";
 165   out = p.str ();
 166
 167   Midi_stream midi_stream (out);
 168   progress_indication (_f ("MIDI output to `%s'...", out));
 169   target_str_global_array.push (out);
 170
 171   output (midi_stream);
 172   progress_indication ("\n");
 173 }