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 #include "scm-option.hh"
  19
  20 #include "killing-cons.tcc"
  21
  22 Midi_item*
  23 Midi_item::midi_p (Audio_item* a)
  24 {
  25   if (Audio_key* i = dynamic_cast<Audio_key*> (a))
  26     return new Midi_key (i);
  27   else if (Audio_instrument* i = dynamic_cast<Audio_instrument*> (a))
  28     return i->str_.length_i () ? new Midi_instrument (i) : 0;
  29   else if (Audio_note* i = dynamic_cast<Audio_note*> (a))
  30     return new Midi_note (i);
  31   else if (Audio_dynamic* i = dynamic_cast<Audio_dynamic*> (a))
  32     return new Midi_dynamic (i);
  33   else if (Audio_piano_pedal* i = dynamic_cast<Audio_piano_pedal*> (a))
  34     return new Midi_piano_pedal (i);
  35   else if (Audio_tempo* i = dynamic_cast<Audio_tempo*> (a))
  36     return new Midi_tempo (i);
  37   else if (Audio_time_signature* i = dynamic_cast<Audio_time_signature*> (a))
  38     return new Midi_time_signature (i);
  39   else if (Audio_text* i = dynamic_cast<Audio_text*> (a))
  40     //return i->text_str_.length_i () ? new Midi_text (i) : 0;
  41     return new Midi_text (i);
  42   else
  43     assert (0);
  44
  45   // isn't C++ grand?
  46   return 0;
  47 }
  48
  49 void
  50 Midi_chunk::set (String header_str, String data_str, String footer_str)
  51 {
  52   data_str_ = data_str;
  53   footer_str_ = footer_str;
  54   header_str_ = header_str;
  55 }
  56
  57 String
  58 Midi_chunk::data_str () const
  59 {
  60   return data_str_;
  61 }
  62
  63 String
  64 Midi_chunk::str () const
  65 {
  66   String str = header_str_;
  67   String dat = data_str ();
  68   String length_str = String_convert::i2hex_str (dat.length_i ()
  69     + footer_str_.length_i (), 8, '0');
  70   length_str = String_convert::hex2bin_str (length_str);
  71   str += length_str;
  72   str += dat;
  73   str += footer_str_;
  74   return str;
  75 }
  76
  77 Midi_duration::Midi_duration (Real seconds_f)
  78 {
  79   seconds_f_ = seconds_f;
  80 }
  81
  82 String
  83 Midi_duration::str () const
  84 {
  85   return String ("<duration: ") + to_str (seconds_f_) + ">";
  86 }
  87
  88 Midi_event::Midi_event (Moment delta_mom, Midi_item* midi_p)
  89 {
  90   delta_mom_ = delta_mom;
  91   midi_p_ = midi_p;
  92 }
  93
  94 String
  95 Midi_event::str () const
  96 {
  97   int delta_i = delta_mom_ * Moment (384 * 4); // ugh.
  98
  99   String delta_str = Midi_item::i2varint_str (delta_i);
 100   String midi_str = midi_p_->str ();
 101   assert (midi_str.length_i ());
 102   return delta_str + midi_str;
 103 }
 104
 105
 106 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
 107 {
 108   String str;
 109
 110   String format_str = String_convert::i2hex_str (format_i, 4, '0');
 111   str += String_convert::hex2bin_str (format_str);
 112
 113   String tracks_str = String_convert::i2hex_str (tracks_i, 4, '0');
 114   str += String_convert::hex2bin_str (tracks_str);
 115
 116   String tempo_str = String_convert::i2hex_str (clocks_per_4_i, 4, '0');
 117   str += String_convert::hex2bin_str (tempo_str);
 118
 119   set ("MThd", str, "");
 120 }
 121
 122 Midi_instrument::Midi_instrument (Audio_instrument* a)
 123 {
 124   audio_l_ = a;
 125   audio_l_->str_.to_lower ();
 126 }
 127
 128 String
 129 Midi_instrument::str() const
 130 {
 131   Byte program_byte = 0;
 132   bool found = false;
 133   SCM proc = scm_eval2 (ly_symbol2scm ("midi-program"), SCM_EOL);
 134   SCM program = gh_call1 (proc, ly_symbol2scm (audio_l_->str_.ch_C()));
 135   found = (program != SCM_BOOL_F);
 136   if (found)
 137     program_byte = gh_scm2int(program);
 138   else
 139       warning (_f ("no such instrument: `%s'", audio_l_->str_.ch_C ()));
 140
 141   String str = to_str ((char) (0xc0 + channel_i_)); //YIKES! FIXME: Should be track. -rz
 142   str += to_str ((char)program_byte);
 143   return str;
 144 }
 145
 146 Midi_item::Midi_item ()
 147 {
 148   channel_i_ = 0;
 149 }
 150
 151 Midi_item::~Midi_item ()
 152 {
 153 }
 154
 155 String
 156 Midi_item::i2varint_str (int i)
 157 {
 158   int buffer_i = i & 0x7f;
 159   while ((i >>= 7) > 0)
 160     {
 161       buffer_i <<= 8;
 162       buffer_i |= 0x80;
 163       buffer_i += (i & 0x7f);
 164     }
 165
 166   String str;
 167   while (1)
 168     {
 169       str += to_str ((char)buffer_i);
 170       if (buffer_i & 0x80)
 171         buffer_i >>= 8;
 172       else
 173         break;
 174     }
 175   return str;
 176 }
 177
 178 Midi_key::Midi_key (Audio_key*a)
 179 {
 180   audio_l_ = a;
 181 }
 182
 183 String
 184 Midi_key::str () const
 185 {
 186   String str = "ff5902";
 187   str += String_convert::i2hex_str (audio_l_->accidentals_, 2, '0');
 188   if (audio_l_->major_)
 189     str += String_convert::i2hex_str (0, 2, '0');
 190   else
 191     str += String_convert::i2hex_str (1, 2, '0');
 192   return String_convert::hex2bin_str (str);
 193 }
 194
 195 Midi_time_signature::Midi_time_signature (Audio_time_signature* a)
 196 {
 197   audio_l_ = a;
 198   clocks_per_1_i_ = 18;
 199 }
 200
 201 String
 202 Midi_time_signature::str () const
 203 {
 204   int num_i = audio_l_->beats_i_;
 205   int den_i = audio_l_->one_beat_i_;
 206
 207   String str = "ff5804";
 208   str += String_convert::i2hex_str (num_i, 2, '0');
 209   str += String_convert::i2hex_str (intlog2 (den_i) , 2, '0');
 210   str += String_convert::i2hex_str (clocks_per_1_i_, 2, '0');
 211   str += String_convert::i2hex_str (8, 2, '0');
 212   return String_convert::hex2bin_str (str);
 213 }
 214
 215 Midi_note::Midi_note (Audio_note* a)
 216 {
 217   audio_l_ = a;
 218   dynamic_byte_ = 0x7f;
 219 }
 220
 221 Moment
 222 Midi_note::length_mom () const
 223 {
 224   Moment m = audio_l_->length_mom_;
 225 #if 0
 226   if (m < Moment (1, 1000))
 227     {
 228       warning (_ ("silly duration"));
 229       m = 1;
 230      }
 231 #endif
 232   return m;
 233 }
 234
 235 int
 236 Midi_note::pitch_i () const
 237 {
 238   int p = audio_l_->pitch_.semitone_pitch () + audio_l_->transposing_i_;
 239   if (p == INT_MAX)
 240     {
 241       warning (_ ("silly pitch"));
 242       p = 0;
 243      }
 244   return p;
 245 }
 246
 247 String
 248 Midi_note::str () const
 249 {
 250   Byte status_byte = (char) (0x90 + channel_i_);
 251
 252   String str = to_str ((char)status_byte);
 253   str += to_str ((char) (pitch_i () + c0_pitch_i_c_));
 254
 255   str += to_str ((char)dynamic_byte_);
 256   return str;
 257 }
 258
 259 Midi_note_off::Midi_note_off (Midi_note* n)
 260   : Midi_note (n->audio_l_)
 261 {
 262   on_l_ = n;
 263   channel_i_ = n->channel_i_;
 264
 265   // Anybody who hears any difference, or knows how this works?
 266   //  0 should definitely be avoided, notes stick on some sound cards.
 267   // 64 is supposed to be neutral
 268
 269   aftertouch_byte_ = 64;
 270 }
 271
 272 String
 273 Midi_note_off::str () const
 274 {
 275   Byte status_byte = (char) (0x80 + channel_i_);
 276
 277   String str = to_str ((char)status_byte);
 278   str += to_str ((char) (pitch_i () + Midi_note::c0_pitch_i_c_));
 279   str += to_str ((char)aftertouch_byte_);
 280   return str;
 281 }
 282
 283 Midi_dynamic::Midi_dynamic (Audio_dynamic* a)
 284 {
 285   audio_l_ = a;
 286 }
 287
 288 String
 289 Midi_dynamic::str () const
 290 {
 291   Byte status_byte = (char) (0xB0 + channel_i_);
 292   String str = to_str ((char)status_byte);
 293
 294   /*
 295     Main volume controller (per channel):
 296     07 MSB
 297     27 LSB
 298    */
 299   static Real const full_scale = 127;
 300
 301   int volume = (int) (audio_l_->volume_*full_scale);
 302   if (volume <= 0)
 303     volume = 1;
 304   if (volume > full_scale)
 305     volume = (int)full_scale;
 306
 307   str += to_str ((char)0x07);
 308   str += to_str ((char)volume);
 309   return str;
 310 }
 311
 312 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal* a)
 313 {
 314   audio_l_ = a;
 315 }
 316
 317 String
 318 Midi_piano_pedal::str () const
 319 {
 320   Byte status_byte = (char) (0xB0 + channel_i_);
 321   String str = to_str ((char)status_byte);
 322
 323   if (audio_l_->type_str_ == "Sostenuto")
 324     str += to_str ((char)0x42);
 325   else if (audio_l_->type_str_ == "Sustain")
 326     str += to_str ((char)0x40);
 327   else if (audio_l_->type_str_ == "UnaChorda")
 328     str += to_str ((char)0x43);
 329
 330   int pedal = ((1 - audio_l_->dir_) / 2) * 0x7f;
 331   str += to_str ((char)pedal);
 332   return str;
 333 }
 334
 335 Midi_tempo::Midi_tempo (Audio_tempo* a)
 336 {
 337   audio_l_ = a;
 338 }
 339
 340 String
 341 Midi_tempo::str () const
 342 {
 343   int useconds_per_4_i = 60 * (int)1e6 / audio_l_->per_minute_4_i_;
 344   String str = "ff5103";
 345   str += String_convert::i2hex_str (useconds_per_4_i, 6, '0');
 346   return String_convert::hex2bin_str (str);
 347 }
 348
 349 Midi_text::Midi_text (Audio_text* a)
 350 {
 351   audio_l_ = a;
 352 }
 353
 354 String
 355 Midi_text::str () const
 356 {
 357   String str = "ff" + String_convert::i2hex_str (audio_l_->type_, 2, '0');
 358   str = String_convert::hex2bin_str (str);
 359   str += i2varint_str (audio_l_->text_str_.length_i ());
 360   str += audio_l_->text_str_;
 361   return str;
 362 }
 363
 364 Midi_track::Midi_track ()
 365   : Midi_chunk ()
 366 {
 367   //                4D 54 72 6B     MTrk
 368   //                00 00 00 3B     chunk length (59)
 369   //        00      FF 58 04 04 02 18 08    time signature
 370   //        00      FF 51 03 07 A1 20       tempo
 371
 372 // FF 59 02 sf mi  Key Signature
 373 //         sf = -7:  7 flats
 374 //         sf = -1:  1 flat
 375 //         sf = 0:  key of C
 376 //         sf = 1:  1 sharp
 377 //         sf = 7: 7 sharps
 378 //         mi = 0:  major key
 379 //         mi = 1:  minor key
 380
 381   number_i_ = 0;
 382
 383   char const* data_ch_C = ""
 384     //        "00" "ff58" "0404" "0218" "08"
 385     //  "00" "ff51" "0307" "a120"
 386     // why a key at all, in midi?
 387     // key: C
 388     //  "00" "ff59" "02" "00" "00"
 389     // key: F (scsii-menuetto)
 390     //                            "00" "ff59" "02" "ff" "00"
 391         ;
 392
 393   String data_str;
 394   // only for format 0 (currently using format 1)?
 395   data_str += String_convert::hex2bin_str (data_ch_C);
 396
 397   char const* footer_ch_C = "00" "ff2f" "00";
 398   String footer_str = String_convert::hex2bin_str (footer_ch_C);
 399
 400   set ("MTrk", data_str, footer_str);
 401 }
 402
 403 void
 404 Midi_track::add (Moment delta_time_mom, Midi_item* midi_p)
 405 {
 406   assert (delta_time_mom >= Moment (0));
 407
 408   Midi_event * e = new Midi_event (delta_time_mom, midi_p);
 409   event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
 410 }
 411
 412 String
 413 Midi_track::data_str () const
 414 {
 415   String str = Midi_chunk::data_str ();
 416   if (midi_debug_global_b)
 417     str += "\n";
 418   for (Cons<Midi_event> *i=event_p_list_.head_; i; i = i->next_)
 419     {
 420       str += i->car_->str ();
 421       if (midi_debug_global_b)
 422         str += "\n";
 423     }
 424   return str;
 425 }