2 midi-item.cc -- implement Midi items.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2007 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "midi-item.hh"
11 #include "duration.hh"
12 #include "international.hh"
14 #include "midi-stream.hh"
16 #include "program-option.hh"
17 #include "string-convert.hh"
20 #define PITCH_WHEEL_TOP 0x3FFF
21 #define PITCH_WHEEL_CENTER 0x2000
22 #define PITCH_WHEEL_BOTTOM 0x0000
23 #define PITCH_WHEEL_RANGE (PITCH_WHEEL_TOP - PITCH_WHEEL_BOTTOM)
26 Midi_item::get_midi (Audio_item *a)
28 if (Audio_key *i = dynamic_cast<Audio_key *> (a))
29 return new Midi_key (i);
30 else if (Audio_instrument *i = dynamic_cast<Audio_instrument *> (a))
31 return i->str_.length () ? new Midi_instrument (i) : 0;
32 else if (Audio_note *i = dynamic_cast<Audio_note *> (a))
33 return new Midi_note (i);
34 else if (Audio_dynamic *i = dynamic_cast<Audio_dynamic *> (a))
35 return new Midi_dynamic (i);
36 else if (Audio_piano_pedal *i = dynamic_cast<Audio_piano_pedal *> (a))
37 return new Midi_piano_pedal (i);
38 else if (Audio_tempo *i = dynamic_cast<Audio_tempo *> (a))
39 return new Midi_tempo (i);
40 else if (Audio_time_signature *i = dynamic_cast<Audio_time_signature *> (a))
41 return new Midi_time_signature (i);
42 else if (Audio_text *i = dynamic_cast<Audio_text *> (a))
43 //return i->text_string_.length () ? new Midi_text (i) : 0;
44 return new Midi_text (i);
53 Midi_chunk::set (string header_string, string data_string, string footer_string)
55 data_string_ = data_string;
56 footer_string_ = footer_string;
57 header_string_ = header_string;
61 Midi_chunk::data_string () const
67 Midi_chunk::to_string () const
69 string str = header_string_;
70 string dat = data_string ();
71 string length_string = String_convert::int2hex (dat.length ()
72 + footer_string_.length (), 8, '0');
73 length_string = String_convert::hex2bin (length_string);
77 str += footer_string_;
82 Midi_duration::Midi_duration (Real seconds_f)
88 Midi_duration::to_string () const
90 return string ("<duration: ") + ::to_string (seconds_) + ">";
93 Midi_event::Midi_event (Moment delta_mom, Midi_item *midi)
95 delta_mom_ = delta_mom;
100 Midi_event::to_string () const
102 assert (delta_mom_.grace_part_ == Rational (0));
104 Rational rat_dt = delta_mom_.main_part_ * Rational (384) * Rational (4);
105 int delta = rat_dt.to_int ();
107 string delta_string = Midi_item::i2varint_string (delta);
108 string midi_string = midi_->to_string ();
109 assert (midi_string.length ());
110 return delta_string + midi_string;
113 Midi_header::Midi_header (int format, int tracks, int clocks_per_4)
117 string format_string = String_convert::int2hex (format, 4, '0');
118 str += String_convert::hex2bin (format_string);
120 string tracks_string = String_convert::int2hex (tracks, 4, '0');
121 str += String_convert::hex2bin (tracks_string);
123 string tempo_string = String_convert::int2hex (clocks_per_4, 4, '0');
124 str += String_convert::hex2bin (tempo_string);
126 set ("MThd", str, "");
129 Midi_instrument::Midi_instrument (Audio_instrument *a)
132 audio_->str_ = String_convert::to_lower (audio_->str_);
136 Midi_instrument::to_string () const
138 Byte program_byte = 0;
141 SCM proc = ly_lily_module_constant ("midi-program");
142 SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.c_str ()));
143 found = (program != SCM_BOOL_F);
145 program_byte = scm_to_int (program);
147 warning (_f ("no such MIDI instrument: `%s'", audio_->str_.c_str ()));
149 string str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME : Should be track. -rz
150 str += ::to_string ((char)program_byte);
154 Midi_item::Midi_item ()
158 Midi_channel_item::~Midi_channel_item ()
163 Midi_channel_item::Midi_channel_item ()
168 Midi_item::~Midi_item ()
173 Midi_item::i2varint_string (int i)
175 int buffer = i & 0x7f;
176 while ((i >>= 7) > 0)
180 buffer += (i & 0x7f);
186 str += ::to_string ((char)buffer);
195 Midi_key::Midi_key (Audio_key *a)
201 Midi_key::to_string () const
203 string str = "ff5902";
204 str += String_convert::int2hex (audio_->accidentals_, 2, '0');
206 str += String_convert::int2hex (0, 2, '0');
208 str += String_convert::int2hex (1, 2, '0');
209 return String_convert::hex2bin (str);
212 Midi_time_signature::Midi_time_signature (Audio_time_signature *a)
219 Midi_time_signature::to_string () const
221 int num = abs (audio_->beats_);
224 warning ("Time signature with more than 255 beats. Truncating");
228 int den = audio_->one_beat_;
232 string str = "ff5804";
233 str += String_convert::int2hex (num, 2, '0');
234 str += String_convert::int2hex (intlog2 (den), 2, '0');
235 str += String_convert::int2hex (clocks_per_1_, 2, '0');
236 str += String_convert::int2hex (8, 2, '0');
237 return String_convert::hex2bin (str);
240 Midi_note::Midi_note (Audio_note *a)
243 dynamic_byte_ = 0x7f;
247 Midi_note::get_length () const
249 Moment m = audio_->end_column_->when () - audio_->audio_column_->when ();
254 Midi_note::get_fine_tuning () const
256 Rational tune = (audio_->pitch_.tone_pitch ()
257 + audio_->transposing_.tone_pitch ()) * Rational (2);
258 tune -= Rational (get_semitone_pitch ());
261 return (int) double (tune);
265 Midi_note::get_semitone_pitch () const
267 return int (double ((audio_->pitch_.tone_pitch ()
268 + audio_->transposing_.tone_pitch ()) * Rational (2)));
272 Midi_note::to_string () const
274 Byte status_byte = (char) (0x90 + channel_);
278 // print warning if fine tuning was needed, HJJ
279 if (get_fine_tuning () != 0)
281 warning (_f ("experimental: temporarily fine tuning (of %d cents) a channel.",
282 get_fine_tuning ()));
284 finetune = PITCH_WHEEL_CENTER;
285 // Move pitch wheel to a shifted position.
286 // The pitch wheel range (of 4 semitones) is multiplied by the cents.
287 finetune += (PITCH_WHEEL_RANGE *get_fine_tuning ()) / (4 * 100);
289 str += ::to_string ((char) (0xE0 + channel_));
290 str += ::to_string ((char) (finetune & 0x7F));
291 str += ::to_string ((char) (finetune >> 7));
292 str += ::to_string ((char) (0x00));
295 str += ::to_string ((char)status_byte);
296 str += ::to_string ((char) (get_semitone_pitch () + c0_pitch_));
297 str += ::to_string ((char)dynamic_byte_);
302 Midi_note_off::Midi_note_off (Midi_note *n)
303 : Midi_note (n->audio_)
306 channel_ = n->channel_;
308 // Anybody who hears any difference, or knows how this works?
309 // 0 should definitely be avoided, notes stick on some sound cards.
310 // 64 is supposed to be neutral
312 aftertouch_byte_ = 64;
316 Midi_note_off::to_string () const
318 Byte status_byte = (char) (0x80 + channel_);
320 string str = ::to_string ((char)status_byte);
321 str += ::to_string ((char) (get_semitone_pitch () + Midi_note::c0_pitch_));
322 str += ::to_string ((char)aftertouch_byte_);
324 if (get_fine_tuning () != 0)
326 // Move pitch wheel back to the central position.
327 str += ::to_string ((char) 0x00);
328 str += ::to_string ((char) (0xE0 + channel_));
329 str += ::to_string ((char) (PITCH_WHEEL_CENTER &0x7F));
330 str += ::to_string ((char) (PITCH_WHEEL_CENTER >> 7));
336 Midi_dynamic::Midi_dynamic (Audio_dynamic *a)
342 Midi_dynamic::to_string () const
344 Byte status_byte = (char) (0xB0 + channel_);
345 string str = ::to_string ((char)status_byte);
348 Main volume controller (per channel):
352 static Real const full_scale = 127;
354 int volume = (int) (audio_->volume_ * full_scale);
357 if (volume > full_scale)
358 volume = (int)full_scale;
360 str += ::to_string ((char)0x07);
361 str += ::to_string ((char)volume);
365 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal *a)
371 Midi_piano_pedal::to_string () const
373 Byte status_byte = (char) (0xB0 + channel_);
374 string str = ::to_string ((char)status_byte);
376 if (audio_->type_string_ == "Sostenuto")
377 str += ::to_string ((char)0x42);
378 else if (audio_->type_string_ == "Sustain")
379 str += ::to_string ((char)0x40);
380 else if (audio_->type_string_ == "UnaCorda")
381 str += ::to_string ((char)0x43);
383 int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
384 str += ::to_string ((char)pedal);
388 Midi_tempo::Midi_tempo (Audio_tempo *a)
394 Midi_tempo::to_string () const
396 int useconds_per_4 = 60 * (int)1e6 / audio_->per_minute_4_;
397 string str = "ff5103";
398 str += String_convert::int2hex (useconds_per_4, 6, '0');
399 return String_convert::hex2bin (str);
402 Midi_text::Midi_text (Audio_text *a)
408 Midi_text::to_string () const
410 string str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
411 str = String_convert::hex2bin (str);
412 str += i2varint_string (audio_->text_string_.length ());
413 str += audio_->text_string_;
417 Midi_track::Midi_track ()
421 // 00 00 00 3B chunk length (59)
422 // 00 FF 58 04 04 02 18 08 time signature
423 // 00 FF 51 03 07 A1 20 tempo
425 // FF 59 02 sf mi Key Signature
436 char const *data_str0 = ""
437 // "00" "ff58" "0404" "0218" "08"
438 // "00" "ff51" "0307" "a120"
439 // why a key at all, in midi?
441 // "00" "ff59" "02" "00" "00"
442 // key: F (scsii-menuetto)
443 // "00" "ff59" "02" "ff" "00"
447 // only for format 0 (currently using format 1)?
448 data_string += String_convert::hex2bin (data_str0);
450 char const *footer_str0 = "00" "ff2f" "00";
451 string footer_string = String_convert::hex2bin (footer_str0);
453 set ("MTrk", data_string, footer_string);
457 Midi_track::add (Moment delta_time_mom, Midi_item *midi)
459 assert (delta_time_mom >= Moment (0));
461 Midi_event *e = new Midi_event (delta_time_mom, midi);
462 events_.push_back (e);
466 Midi_track::data_string () const
468 string str = Midi_chunk::data_string ();
469 if (do_midi_debugging_global)
472 for (vector<Midi_event*>::const_iterator i (events_.begin());
473 i != events_.end(); i ++)
475 str += (*i)->to_string ();
476 if (do_midi_debugging_global)
484 Midi_item::name () const
486 return this->class_name ();
489 Midi_track::~Midi_track ()
491 junk_pointers (events_);