lily/midi-item.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2011 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   : Midi_channel_item (a)
  76   , audio_ (a)
  77 {
  78   audio_->str_ = String_convert::to_lower (audio_->str_);
  79 }
  80
  81 string
  82 Midi_instrument::to_string () const
  83 {
  84   Byte program_byte = 0;
  85   bool found = false;
  86
  87   SCM proc = ly_lily_module_constant ("midi-program");
  88   SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.c_str ()));
  89   found = (program != SCM_BOOL_F);
  90   if (found)
  91     program_byte = (Byte) scm_to_int (program);
  92   else
  93     warning (_f ("no such MIDI instrument: `%s'", audio_->str_.c_str ()));
  94
  95   string str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME : Should be track. -rz
  96   str += ::to_string ((char)program_byte);
  97   return str;
  98 }
  99
 100 Midi_item::Midi_item ()
 101 {
 102 }
 103
 104 Midi_channel_item::Midi_channel_item (Audio_item *ai)
 105   : channel_ (ai->channel_)
 106 {
 107 }
 108
 109 Midi_item::~Midi_item ()
 110 {
 111 }
 112
 113 string
 114 int2midi_varint_string (int i)
 115 {
 116   int buffer = i & 0x7f;
 117   while ((i >>= 7) > 0)
 118     {
 119       buffer <<= 8;
 120       buffer |= 0x80;
 121       buffer += (i & 0x7f);
 122     }
 123
 124   string str;
 125   while (1)
 126     {
 127       str += ::to_string ((char)buffer);
 128       if (buffer & 0x80)
 129         buffer >>= 8;
 130       else
 131         break;
 132     }
 133   return str;
 134 }
 135
 136 Midi_key::Midi_key (Audio_key *a)
 137   : audio_ (a)
 138 {
 139 }
 140
 141 string
 142 Midi_key::to_string () const
 143 {
 144   string str = "ff5902";
 145   str += String_convert::int2hex (audio_->accidentals_, 2, '0');
 146   if (audio_->major_)
 147     str += String_convert::int2hex (0, 2, '0');
 148   else
 149     str += String_convert::int2hex (1, 2, '0');
 150   return String_convert::hex2bin (str);
 151 }
 152
 153 Midi_time_signature::Midi_time_signature (Audio_time_signature *a)
 154   : audio_ (a)
 155   , clocks_per_1_ (18)
 156 {
 157 }
 158
 159 string
 160 Midi_time_signature::to_string () const
 161 {
 162   int num = abs (audio_->beats_);
 163   if (num > 255)
 164     {
 165       warning ("Time signature with more than 255 beats. Truncating");
 166       num = 255;
 167     }
 168
 169   int den = audio_->one_beat_;
 170
 171
 172
 173   string str = "ff5804";
 174   str += String_convert::int2hex (num, 2, '0');
 175   str += String_convert::int2hex (intlog2 (den), 2, '0');
 176   str += String_convert::int2hex (clocks_per_1_, 2, '0');
 177   str += String_convert::int2hex (8, 2, '0');
 178   return String_convert::hex2bin (str);
 179 }
 180
 181 Midi_note::Midi_note (Audio_note *a)
 182   : Midi_channel_item (a)
 183   , audio_ (a)
 184   , dynamic_byte_ (a->volume_ > 0 ? Byte (a->volume_ * 0x7f) : Byte (0x5a))
 185 {
 186 }
 187
 188 int
 189 Midi_note::get_fine_tuning () const
 190 {
 191   Rational tune = (audio_->pitch_.tone_pitch ()
 192                    + audio_->transposing_.tone_pitch ()) * Rational (2);
 193   tune -= Rational (get_semitone_pitch ());
 194
 195   tune *= 100;
 196   return (int) double (tune);
 197 }
 198
 199 int
 200 Midi_note::get_semitone_pitch () const
 201 {
 202   return int (double ((audio_->pitch_.tone_pitch ()
 203                        + audio_->transposing_.tone_pitch ()) * Rational (2)));
 204 }
 205
 206 string
 207 Midi_note::to_string () const
 208 {
 209   Byte status_byte = (char) (0x90 + channel_);
 210   string str = "";
 211   int finetune;
 212
 213   // print warning if fine tuning was needed, HJJ
 214   if (get_fine_tuning () != 0)
 215     {
 216       finetune = PITCH_WHEEL_CENTER;
 217       // Move pitch wheel to a shifted position.
 218       // The pitch wheel range (of 4 semitones) is multiplied by the cents.
 219       finetune += (PITCH_WHEEL_RANGE *get_fine_tuning ()) / (4 * 100);
 220
 221       str += ::to_string ((char) (0xE0 + channel_));
 222       str += ::to_string ((char) (finetune & 0x7F));
 223       str += ::to_string ((char) (finetune >> 7));
 224       str += ::to_string ((char) (0x00));
 225     }
 226
 227   str += ::to_string ((char) status_byte);
 228   str += ::to_string ((char) (get_semitone_pitch () + c0_pitch_));
 229   str += ::to_string ((char) dynamic_byte_);
 230
 231   return str;
 232 }
 233
 234 Midi_note_off::Midi_note_off (Midi_note *n)
 235   : Midi_note (n->audio_)
 236 {
 237   on_ = n;
 238   channel_ = n->channel_;
 239
 240   // use note_on with velocity=0 instead of note_off
 241   aftertouch_byte_ = 0;
 242 }
 243
 244 string
 245 Midi_note_off::to_string () const
 246 {
 247   Byte status_byte = (char) (0x90 + channel_);
 248
 249   string str = ::to_string ((char)status_byte);
 250   str += ::to_string ((char) (get_semitone_pitch () + Midi_note::c0_pitch_));
 251   str += ::to_string ((char)aftertouch_byte_);
 252
 253   if (get_fine_tuning () != 0)
 254     {
 255       // Move pitch wheel back to the central position.
 256       str += ::to_string ((char) 0x00);
 257       str += ::to_string ((char) (0xE0 + channel_));
 258       str += ::to_string ((char) (PITCH_WHEEL_CENTER &0x7F));
 259       str += ::to_string ((char) (PITCH_WHEEL_CENTER >> 7));
 260     }
 261
 262   return str;
 263 }
 264
 265 Midi_dynamic::Midi_dynamic (Audio_dynamic *a)
 266   : Midi_channel_item (a)
 267   , audio_ (a)
 268 {
 269 }
 270
 271 string
 272 Midi_dynamic::to_string () const
 273 {
 274   if (audio_->volume_ < 0)
 275     return "";
 276
 277   Byte status_byte = (char) (0xB0 + channel_);
 278   string str = ::to_string ((char)status_byte);
 279
 280   /*
 281     Main volume controller (per channel):
 282     07 MSB
 283     27 LSB
 284   */
 285   static Real const full_scale = 127;
 286
 287   int volume = (int) (audio_->volume_ * full_scale);
 288   if (volume <= 0)
 289     volume = 1;
 290   if (volume > full_scale)
 291     volume = (int)full_scale;
 292
 293   str += ::to_string ((char)0x07);
 294   str += ::to_string ((char)volume);
 295   return str;
 296 }
 297
 298 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal *a)
 299   : Midi_channel_item (a)
 300   , audio_ (a)
 301 {
 302 }
 303
 304 string
 305 Midi_piano_pedal::to_string () const
 306 {
 307   Byte status_byte = (char) (0xB0 + channel_);
 308   string str = ::to_string ((char)status_byte);
 309
 310   if (audio_->type_string_ == "Sostenuto")
 311     str += ::to_string ((char)0x42);
 312   else if (audio_->type_string_ == "Sustain")
 313     str += ::to_string ((char)0x40);
 314   else if (audio_->type_string_ == "UnaCorda")
 315     str += ::to_string ((char)0x43);
 316
 317   int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
 318   str += ::to_string ((char)pedal);
 319   return str;
 320 }
 321
 322 Midi_tempo::Midi_tempo (Audio_tempo *a)
 323   : audio_ (a)
 324 {
 325 }
 326
 327 string
 328 Midi_tempo::to_string () const
 329 {
 330   int useconds_per_4 = 60 * (int)1e6 / audio_->per_minute_4_;
 331   string str = "ff5103";
 332   str += String_convert::int2hex (useconds_per_4, 6, '0');
 333   return String_convert::hex2bin (str);
 334 }
 335
 336 Midi_text::Midi_text (Audio_text *a)
 337   : audio_ (a)
 338 {
 339 }
 340
 341 string
 342 Midi_text::to_string () const
 343 {
 344   string str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
 345   str = String_convert::hex2bin (str);
 346   str += int2midi_varint_string (audio_->text_string_.length ());
 347   str += audio_->text_string_;
 348   return str;
 349 }
 350
 351 char const *
 352 Midi_item::name () const
 353 {
 354    return this->class_name ();
 355 }