lily/midi-item.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2010 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "midi-item.hh"
  21
  22 #include "duration.hh"
  23 #include "international.hh"
  24 #include "main.hh"
  25 #include "midi-stream.hh"
  26 #include "misc.hh"
  27 #include "program-option.hh"
  28 #include "string-convert.hh"
  29 #include "warn.hh"
  30
  31 #define PITCH_WHEEL_TOP 0x3FFF
  32 #define PITCH_WHEEL_CENTER 0x2000
  33 #define PITCH_WHEEL_BOTTOM 0x0000
  34 #define PITCH_WHEEL_RANGE (PITCH_WHEEL_TOP - PITCH_WHEEL_BOTTOM)
  35
  36 Midi_item *
  37 Midi_item::get_midi (Audio_item *a)
  38 {
  39   if (Audio_key *i = dynamic_cast<Audio_key *> (a))
  40     return new Midi_key (i);
  41   else if (Audio_instrument *i = dynamic_cast<Audio_instrument *> (a))
  42     return i->str_.length () ? new Midi_instrument (i) : 0;
  43   else if (Audio_note *i = dynamic_cast<Audio_note *> (a))
  44     return new Midi_note (i);
  45   else if (Audio_dynamic *i = dynamic_cast<Audio_dynamic *> (a))
  46     return new Midi_dynamic (i);
  47   else if (Audio_piano_pedal *i = dynamic_cast<Audio_piano_pedal *> (a))
  48     return new Midi_piano_pedal (i);
  49   else if (Audio_tempo *i = dynamic_cast<Audio_tempo *> (a))
  50     return new Midi_tempo (i);
  51   else if (Audio_time_signature *i = dynamic_cast<Audio_time_signature *> (a))
  52     return new Midi_time_signature (i);
  53   else if (Audio_text *i = dynamic_cast<Audio_text *> (a))
  54     return new Midi_text (i);
  55   else
  56     assert (0);
  57
  58   return 0;
  59 }
  60
  61
  62
  63 Midi_duration::Midi_duration (Real seconds_f)
  64 {
  65   seconds_ = seconds_f;
  66 }
  67
  68 string
  69 Midi_duration::to_string () const
  70 {
  71   return string ("<duration: ") + ::to_string (seconds_) + ">";
  72 }
  73
  74 Midi_instrument::Midi_instrument (Audio_instrument *a)
  75 {
  76   audio_ = a;
  77   audio_->str_ = String_convert::to_lower (audio_->str_);
  78 }
  79
  80 string
  81 Midi_instrument::to_string () const
  82 {
  83   Byte program_byte = 0;
  84   bool found = false;
  85
  86   SCM proc = ly_lily_module_constant ("midi-program");
  87   SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.c_str ()));
  88   found = (program != SCM_BOOL_F);
  89   if (found)
  90     program_byte = scm_to_int (program);
  91   else
  92     warning (_f ("no such MIDI instrument: `%s'", audio_->str_.c_str ()));
  93
  94   string str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME : Should be track. -rz
  95   str += ::to_string ((char)program_byte);
  96   return str;
  97 }
  98
  99 Midi_item::Midi_item ()
 100 {
 101 }
 102
 103 Midi_channel_item::Midi_channel_item ()
 104 {
 105   channel_ = 0;
 106 }
 107
 108 Midi_item::~Midi_item ()
 109 {
 110 }
 111
 112 string
 113 int2midi_varint_string (int i)
 114 {
 115   int buffer = i & 0x7f;
 116   while ((i >>= 7) > 0)
 117     {
 118       buffer <<= 8;
 119       buffer |= 0x80;
 120       buffer += (i & 0x7f);
 121     }
 122
 123   string str;
 124   while (1)
 125     {
 126       str += ::to_string ((char)buffer);
 127       if (buffer & 0x80)
 128         buffer >>= 8;
 129       else
 130         break;
 131     }
 132   return str;
 133 }
 134
 135 Midi_key::Midi_key (Audio_key *a)
 136 {
 137   audio_ = a;
 138 }
 139
 140 string
 141 Midi_key::to_string () const
 142 {
 143   string str = "ff5902";
 144   str += String_convert::int2hex (audio_->accidentals_, 2, '0');
 145   if (audio_->major_)
 146     str += String_convert::int2hex (0, 2, '0');
 147   else
 148     str += String_convert::int2hex (1, 2, '0');
 149   return String_convert::hex2bin (str);
 150 }
 151
 152 Midi_time_signature::Midi_time_signature (Audio_time_signature *a)
 153 {
 154   audio_ = a;
 155   clocks_per_1_ = 18;
 156 }
 157
 158 string
 159 Midi_time_signature::to_string () const
 160 {
 161   int num = abs (audio_->beats_);
 162   if (num > 255)
 163     {
 164       warning ("Time signature with more than 255 beats. Truncating");
 165       num = 255;
 166     }
 167
 168   int den = audio_->one_beat_;
 169
 170
 171
 172   string str = "ff5804";
 173   str += String_convert::int2hex (num, 2, '0');
 174   str += String_convert::int2hex (intlog2 (den), 2, '0');
 175   str += String_convert::int2hex (clocks_per_1_, 2, '0');
 176   str += String_convert::int2hex (8, 2, '0');
 177   return String_convert::hex2bin (str);
 178 }
 179
 180 Midi_note::Midi_note (Audio_note *a)
 181 {
 182   audio_ = a;
 183   dynamic_byte_ = 0x5a;
 184 }
 185
 186
 187 int
 188 Midi_note::get_fine_tuning () const
 189 {
 190   Rational tune = (audio_->pitch_.tone_pitch ()
 191                    + audio_->transposing_.tone_pitch ()) * Rational (2);
 192   tune -= Rational (get_semitone_pitch ());
 193
 194   tune *= 100;
 195   return (int) double (tune);
 196 }
 197
 198 int
 199 Midi_note::get_semitone_pitch () const
 200 {
 201   return int (double ((audio_->pitch_.tone_pitch ()
 202                        + audio_->transposing_.tone_pitch ()) * Rational (2)));
 203 }
 204
 205 string
 206 Midi_note::to_string () const
 207 {
 208   Byte status_byte = (char) (0x90 + channel_);
 209   string str = "";
 210   int finetune;
 211
 212   // print warning if fine tuning was needed, HJJ
 213   if (get_fine_tuning () != 0)
 214     {
 215       finetune = PITCH_WHEEL_CENTER;
 216       // Move pitch wheel to a shifted position.
 217       // The pitch wheel range (of 4 semitones) is multiplied by the cents.
 218       finetune += (PITCH_WHEEL_RANGE *get_fine_tuning ()) / (4 * 100);
 219
 220       str += ::to_string ((char) (0xE0 + channel_));
 221       str += ::to_string ((char) (finetune & 0x7F));
 222       str += ::to_string ((char) (finetune >> 7));
 223       str += ::to_string ((char) (0x00));
 224     }
 225
 226   str += ::to_string ((char) status_byte);
 227   str += ::to_string ((char) (get_semitone_pitch () + c0_pitch_));
 228   str += ::to_string ((char) dynamic_byte_);
 229
 230   return str;
 231 }
 232
 233 Midi_note_off::Midi_note_off (Midi_note *n)
 234   : Midi_note (n->audio_)
 235 {
 236   on_ = n;
 237   channel_ = n->channel_;
 238
 239   // use note_on with velocity=0 instead of note_off
 240   aftertouch_byte_ = 0;
 241 }
 242
 243 string
 244 Midi_note_off::to_string () const
 245 {
 246   Byte status_byte = (char) (0x90 + channel_);
 247
 248   string str = ::to_string ((char)status_byte);
 249   str += ::to_string ((char) (get_semitone_pitch () + Midi_note::c0_pitch_));
 250   str += ::to_string ((char)aftertouch_byte_);
 251
 252   if (get_fine_tuning () != 0)
 253     {
 254       // Move pitch wheel back to the central position.
 255       str += ::to_string ((char) 0x00);
 256       str += ::to_string ((char) (0xE0 + channel_));
 257       str += ::to_string ((char) (PITCH_WHEEL_CENTER &0x7F));
 258       str += ::to_string ((char) (PITCH_WHEEL_CENTER >> 7));
 259     }
 260
 261   return str;
 262 }
 263
 264 Midi_dynamic::Midi_dynamic (Audio_dynamic *a)
 265 {
 266   audio_ = a;
 267 }
 268
 269 string
 270 Midi_dynamic::to_string () const
 271 {
 272   Byte status_byte = (char) (0xB0 + channel_);
 273   string str = ::to_string ((char)status_byte);
 274
 275   /*
 276     Main volume controller (per channel):
 277     07 MSB
 278     27 LSB
 279   */
 280   static Real const full_scale = 127;
 281
 282   int volume = (int) (audio_->volume_ * full_scale);
 283   if (volume <= 0)
 284     volume = 1;
 285   if (volume > full_scale)
 286     volume = (int)full_scale;
 287
 288   str += ::to_string ((char)0x07);
 289   str += ::to_string ((char)volume);
 290   return str;
 291 }
 292
 293 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal *a)
 294 {
 295   audio_ = a;
 296 }
 297
 298 string
 299 Midi_piano_pedal::to_string () const
 300 {
 301   Byte status_byte = (char) (0xB0 + channel_);
 302   string str = ::to_string ((char)status_byte);
 303
 304   if (audio_->type_string_ == "Sostenuto")
 305     str += ::to_string ((char)0x42);
 306   else if (audio_->type_string_ == "Sustain")
 307     str += ::to_string ((char)0x40);
 308   else if (audio_->type_string_ == "UnaCorda")
 309     str += ::to_string ((char)0x43);
 310
 311   int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
 312   str += ::to_string ((char)pedal);
 313   return str;
 314 }
 315
 316 Midi_tempo::Midi_tempo (Audio_tempo *a)
 317 {
 318   audio_ = a;
 319 }
 320
 321 string
 322 Midi_tempo::to_string () const
 323 {
 324   int useconds_per_4 = 60 * (int)1e6 / audio_->per_minute_4_;
 325   string str = "ff5103";
 326   str += String_convert::int2hex (useconds_per_4, 6, '0');
 327   return String_convert::hex2bin (str);
 328 }
 329
 330 Midi_text::Midi_text (Audio_text *a)
 331 {
 332   audio_ = a;
 333 }
 334
 335 string
 336 Midi_text::to_string () const
 337 {
 338   string str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
 339   str = String_convert::hex2bin (str);
 340   str += int2midi_varint_string (audio_->text_string_.length ());
 341   str += audio_->text_string_;
 342   return str;
 343 }
 344
 345 char const *
 346 Midi_item::name () const
 347 {
 348    return this->class_name ();
 349 }