lily/midi-item.cc

   1 /*
   2   midi-item.cc -- implement Midi items.
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2001 Jan Nieuwenhuizen <janneke@gnu.org>
   7  */
   8
   9 #include "debug.hh"
  10 #include "main.hh"
  11 #include "misc.hh"
  12 #include "string.hh"
  13 #include "string-convert.hh"
  14 #include "midi-item.hh"
  15 #include "midi-stream.hh"
  16 #include "audio-item.hh"
  17 #include "duration.hh"
  18
  19 #include "killing-cons.tcc"
  20
  21 Midi_item*
  22 Midi_item::midi_p (Audio_item* a)
  23 {
  24   if (Audio_key* i = dynamic_cast<Audio_key*> (a))
  25     return new Midi_key (i);
  26   else if (Audio_instrument* i = dynamic_cast<Audio_instrument*> (a))
  27     return i->str_.length_i () ? new Midi_instrument (i) : 0;
  28   else if (Audio_note* i = dynamic_cast<Audio_note*> (a))
  29     return new Midi_note (i);
  30   else if (Audio_dynamic* i = dynamic_cast<Audio_dynamic*> (a))
  31     return new Midi_dynamic (i);
  32   else if (Audio_piano_pedal* i = dynamic_cast<Audio_piano_pedal*> (a))
  33     return new Midi_piano_pedal (i);
  34   else if (Audio_tempo* i = dynamic_cast<Audio_tempo*> (a))
  35     return new Midi_tempo (i);
  36   else if (Audio_time_signature* i = dynamic_cast<Audio_time_signature*> (a))
  37     return new Midi_time_signature (i);
  38   else if (Audio_text* i = dynamic_cast<Audio_text*> (a))
  39     //return i->text_str_.length_i () ? new Midi_text (i) : 0;
  40     return new Midi_text (i);
  41   else
  42     assert (0);
  43
  44   // isn't C++ grand?
  45   return 0;
  46 }
  47
  48 void
  49 Midi_chunk::set (String header_str, String data_str, String footer_str)
  50 {
  51   data_str_ = data_str;
  52   footer_str_ = footer_str;
  53   header_str_ = header_str;
  54 }
  55
  56 String
  57 Midi_chunk::data_str () const
  58 {
  59   return data_str_;
  60 }
  61
  62 String
  63 Midi_chunk::str () const
  64 {
  65   String str = header_str_;
  66   String dat = data_str ();
  67   String length_str = String_convert::i2hex_str (dat.length_i ()
  68     + footer_str_.length_i (), 8, '0');
  69   length_str = String_convert::hex2bin_str (length_str);
  70   str += length_str;
  71   str += dat;
  72   str += footer_str_;
  73   return str;
  74 }
  75
  76 Midi_duration::Midi_duration (Real seconds_f)
  77 {
  78   seconds_f_ = seconds_f;
  79 }
  80
  81 String
  82 Midi_duration::str () const
  83 {
  84   return String ("<duration: ") + to_str (seconds_f_) + ">";
  85 }
  86
  87 Midi_event::Midi_event (Moment delta_mom, Midi_item* midi_p)
  88 {
  89   delta_mom_ = delta_mom;
  90   midi_p_ = midi_p;
  91 }
  92
  93 String
  94 Midi_event::str () const
  95 {
  96   int delta_i = delta_mom_ * Moment (384 * 4); // ugh.
  97
  98   String delta_str = Midi_item::i2varint_str (delta_i);
  99   String midi_str = midi_p_->str ();
 100   assert (midi_str.length_i ());
 101   return delta_str + midi_str;
 102 }
 103
 104
 105 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
 106 {
 107   String str;
 108
 109   String format_str = String_convert::i2hex_str (format_i, 4, '0');
 110   str += String_convert::hex2bin_str (format_str);
 111
 112   String tracks_str = String_convert::i2hex_str (tracks_i, 4, '0');
 113   str += String_convert::hex2bin_str (tracks_str);
 114
 115   String tempo_str = String_convert::i2hex_str (clocks_per_4_i, 4, '0');
 116   str += String_convert::hex2bin_str (tempo_str);
 117
 118   set ("MThd", str, "");
 119 }
 120
 121 Midi_instrument::Midi_instrument (Audio_instrument* a)
 122 {
 123   audio_l_ = a;
 124   audio_l_->str_.to_lower ();
 125 }
 126
 127 String
 128 Midi_instrument::str() const
 129 {
 130   Byte program_byte = 0;
 131   bool found = false;
 132   SCM proc = scm_eval2 (ly_symbol2scm ("midi-program"), SCM_EOL);
 133   SCM program = gh_call1 (proc, ly_symbol2scm (audio_l_->str_.ch_C()));
 134   found = (program != SCM_BOOL_F);
 135   if (found)
 136     program_byte = gh_scm2int(program);
 137   else
 138       warning (_f ("no such instrument: `%s'", audio_l_->str_.ch_C ()));
 139
 140   String str = to_str ((char) (0xc0 + channel_i_)); //YIKES! FIXME: Should be track. -rz
 141   str += to_str ((char)program_byte);
 142   return str;
 143 }
 144
 145 Midi_item::Midi_item ()
 146 {
 147   channel_i_ = 0;
 148 }
 149
 150 Midi_item::~Midi_item ()
 151 {
 152 }
 153
 154 String
 155 Midi_item::i2varint_str (int i)
 156 {
 157   int buffer_i = i & 0x7f;
 158   while ((i >>= 7) > 0)
 159     {
 160       buffer_i <<= 8;
 161       buffer_i |= 0x80;
 162       buffer_i += (i & 0x7f);
 163     }
 164
 165   String str;
 166   while (1)
 167     {
 168       str += to_str ((char)buffer_i);
 169       if (buffer_i & 0x80)
 170         buffer_i >>= 8;
 171       else
 172         break;
 173     }
 174   return str;
 175 }
 176
 177 Midi_key::Midi_key (Audio_key*a)
 178 {
 179   audio_l_ = a;
 180 }
 181
 182 String
 183 Midi_key::str () const
 184 {
 185   String str = "ff5902";
 186   str += String_convert::i2hex_str (audio_l_->accidentals_, 2, '0');
 187   if (audio_l_->major_)
 188     str += String_convert::i2hex_str (0, 2, '0');
 189   else
 190     str += String_convert::i2hex_str (1, 2, '0');
 191   return String_convert::hex2bin_str (str);
 192 }
 193
 194 Midi_time_signature::Midi_time_signature (Audio_time_signature* a)
 195 {
 196   audio_l_ = a;
 197   clocks_per_1_i_ = 18;
 198 }
 199
 200 String
 201 Midi_time_signature::str () const
 202 {
 203   int num_i = audio_l_->beats_i_;
 204   int den_i = audio_l_->one_beat_i_;
 205
 206   String str = "ff5804";
 207   str += String_convert::i2hex_str (num_i, 2, '0');
 208   str += String_convert::i2hex_str (intlog2 (den_i) , 2, '0');
 209   str += String_convert::i2hex_str (clocks_per_1_i_, 2, '0');
 210   str += String_convert::i2hex_str (8, 2, '0');
 211   return String_convert::hex2bin_str (str);
 212 }
 213
 214 Midi_note::Midi_note (Audio_note* a)
 215 {
 216   audio_l_ = a;
 217   dynamic_byte_ = 0x7f;
 218 }
 219
 220 Moment
 221 Midi_note::length_mom () const
 222 {
 223   Moment m = audio_l_->length_mom_;
 224 #if 0
 225   if (m < Moment (1, 1000))
 226     {
 227       warning (_ ("silly duration"));
 228       m = 1;
 229      }
 230 #endif
 231   return m;
 232 }
 233
 234 int
 235 Midi_note::pitch_i () const
 236 {
 237   int p = audio_l_->pitch_.semitone_pitch () + audio_l_->transposing_i_;
 238   if (p == INT_MAX)
 239     {
 240       warning (_ ("silly pitch"));
 241       p = 0;
 242      }
 243   return p;
 244 }
 245
 246 String
 247 Midi_note::str () const
 248 {
 249   Byte status_byte = (char) (0x90 + channel_i_);
 250
 251   String str = to_str ((char)status_byte);
 252   str += to_str ((char) (pitch_i () + c0_pitch_i_c_));
 253
 254   str += to_str ((char)dynamic_byte_);
 255   return str;
 256 }
 257
 258 Midi_note_off::Midi_note_off (Midi_note* n)
 259   : Midi_note (n->audio_l_)
 260 {
 261   on_l_ = n;
 262   channel_i_ = n->channel_i_;
 263
 264   // Anybody who hears any difference, or knows how this works?
 265   //  0 should definitely be avoided, notes stick on some sound cards.
 266   // 64 is supposed to be neutral
 267
 268   aftertouch_byte_ = 64;
 269 }
 270
 271 String
 272 Midi_note_off::str () const
 273 {
 274   Byte status_byte = (char) (0x80 + channel_i_);
 275
 276   String str = to_str ((char)status_byte);
 277   str += to_str ((char) (pitch_i () + Midi_note::c0_pitch_i_c_));
 278   str += to_str ((char)aftertouch_byte_);
 279   return str;
 280 }
 281
 282 Midi_dynamic::Midi_dynamic (Audio_dynamic* a)
 283 {
 284   audio_l_ = a;
 285 }
 286
 287 String
 288 Midi_dynamic::str () const
 289 {
 290   Byte status_byte = (char) (0xB0 + channel_i_);
 291   String str = to_str ((char)status_byte);
 292
 293   /*
 294     Main volume controller (per channel):
 295     07 MSB
 296     27 LSB
 297    */
 298   static Real const full_scale = 127;
 299
 300   int volume = (int) (audio_l_->volume_*full_scale);
 301   if (volume <= 0)
 302     volume = 1;
 303   if (volume > full_scale)
 304     volume = (int)full_scale;
 305
 306   str += to_str ((char)0x07);
 307   str += to_str ((char)volume);
 308   return str;
 309 }
 310
 311 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal* a)
 312 {
 313   audio_l_ = a;
 314 }
 315
 316 String
 317 Midi_piano_pedal::str () const
 318 {
 319   Byte status_byte = (char) (0xB0 + channel_i_);
 320   String str = to_str ((char)status_byte);
 321
 322   if (audio_l_->type_str_ == "Sostenuto")
 323     str += to_str ((char)0x42);
 324   else if (audio_l_->type_str_ == "Sustain")
 325     str += to_str ((char)0x40);
 326   else if (audio_l_->type_str_ == "UnaChorda")
 327     str += to_str ((char)0x43);
 328
 329   int pedal = ((1 - audio_l_->dir_) / 2) * 0x7f;
 330   str += to_str ((char)pedal);
 331   return str;
 332 }
 333
 334 Midi_tempo::Midi_tempo (Audio_tempo* a)
 335 {
 336   audio_l_ = a;
 337 }
 338
 339 String
 340 Midi_tempo::str () const
 341 {
 342   int useconds_per_4_i = 60 * (int)1e6 / audio_l_->per_minute_4_i_;
 343   String str = "ff5103";
 344   str += String_convert::i2hex_str (useconds_per_4_i, 6, '0');
 345   return String_convert::hex2bin_str (str);
 346 }
 347
 348 Midi_text::Midi_text (Audio_text* a)
 349 {
 350   audio_l_ = a;
 351 }
 352
 353 String
 354 Midi_text::str () const
 355 {
 356   String str = "ff" + String_convert::i2hex_str (audio_l_->type_, 2, '0');
 357   str = String_convert::hex2bin_str (str);
 358   str += i2varint_str (audio_l_->text_str_.length_i ());
 359   str += audio_l_->text_str_;
 360   return str;
 361 }
 362
 363 Midi_track::Midi_track ()
 364   : Midi_chunk ()
 365 {
 366   //                4D 54 72 6B     MTrk
 367   //                00 00 00 3B     chunk length (59)
 368   //        00      FF 58 04 04 02 18 08    time signature
 369   //        00      FF 51 03 07 A1 20       tempo
 370
 371 // FF 59 02 sf mi  Key Signature
 372 //         sf = -7:  7 flats
 373 //         sf = -1:  1 flat
 374 //         sf = 0:  key of C
 375 //         sf = 1:  1 sharp
 376 //         sf = 7: 7 sharps
 377 //         mi = 0:  major key
 378 //         mi = 1:  minor key
 379
 380   number_i_ = 0;
 381
 382   char const* data_ch_C = ""
 383     //        "00" "ff58" "0404" "0218" "08"
 384     //  "00" "ff51" "0307" "a120"
 385     // why a key at all, in midi?
 386     // key: C
 387     //  "00" "ff59" "02" "00" "00"
 388     // key: F (scsii-menuetto)
 389     //                            "00" "ff59" "02" "ff" "00"
 390         ;
 391
 392   String data_str;
 393   // only for format 0 (currently using format 1)?
 394   data_str += String_convert::hex2bin_str (data_ch_C);
 395
 396   char const* footer_ch_C = "00" "ff2f" "00";
 397   String footer_str = String_convert::hex2bin_str (footer_ch_C);
 398
 399   set ("MTrk", data_str, footer_str);
 400 }
 401
 402 void
 403 Midi_track::add (Moment delta_time_mom, Midi_item* midi_p)
 404 {
 405   assert (delta_time_mom >= Moment (0));
 406
 407   Midi_event * e = new Midi_event (delta_time_mom, midi_p);
 408   event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
 409 }
 410
 411 String
 412 Midi_track::data_str () const
 413 {
 414   String str = Midi_chunk::data_str ();
 415   if (midi_debug_global_b)
 416     str += "\n";
 417   for (Cons<Midi_event> *i=event_p_list_.head_; i; i = i->next_)
 418     {
 419       str += i->car_->str ();
 420       if (midi_debug_global_b)
 421         str += "\n";
 422     }
 423   return str;
 424 }