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 (int delta_ticks, Midi_item *midi)
95 delta_ticks_ = delta_ticks;
100 Midi_event::to_string () const
102 string delta_string = Midi_item::i2varint_string (delta_ticks_);
103 string midi_string = midi_->to_string ();
104 assert (midi_string.length ());
105 return delta_string + midi_string;
108 Midi_header::Midi_header (int format, int tracks, int clocks_per_4)
112 string format_string = String_convert::int2hex (format, 4, '0');
113 str += String_convert::hex2bin (format_string);
115 string tracks_string = String_convert::int2hex (tracks, 4, '0');
116 str += String_convert::hex2bin (tracks_string);
118 string tempo_string = String_convert::int2hex (clocks_per_4, 4, '0');
119 str += String_convert::hex2bin (tempo_string);
121 set ("MThd", str, "");
124 Midi_instrument::Midi_instrument (Audio_instrument *a)
127 audio_->str_ = String_convert::to_lower (audio_->str_);
131 Midi_instrument::to_string () const
133 Byte program_byte = 0;
136 SCM proc = ly_lily_module_constant ("midi-program");
137 SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.c_str ()));
138 found = (program != SCM_BOOL_F);
140 program_byte = scm_to_int (program);
142 warning (_f ("no such MIDI instrument: `%s'", audio_->str_.c_str ()));
144 string str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME : Should be track. -rz
145 str += ::to_string ((char)program_byte);
149 Midi_item::Midi_item ()
153 Midi_channel_item::~Midi_channel_item ()
158 Midi_channel_item::Midi_channel_item ()
163 Midi_item::~Midi_item ()
168 Midi_item::i2varint_string (int i)
170 int buffer = i & 0x7f;
171 while ((i >>= 7) > 0)
175 buffer += (i & 0x7f);
181 str += ::to_string ((char)buffer);
190 Midi_key::Midi_key (Audio_key *a)
196 Midi_key::to_string () const
198 string str = "ff5902";
199 str += String_convert::int2hex (audio_->accidentals_, 2, '0');
201 str += String_convert::int2hex (0, 2, '0');
203 str += String_convert::int2hex (1, 2, '0');
204 return String_convert::hex2bin (str);
207 Midi_time_signature::Midi_time_signature (Audio_time_signature *a)
214 Midi_time_signature::to_string () const
216 int num = abs (audio_->beats_);
219 warning ("Time signature with more than 255 beats. Truncating");
223 int den = audio_->one_beat_;
227 string str = "ff5804";
228 str += String_convert::int2hex (num, 2, '0');
229 str += String_convert::int2hex (intlog2 (den), 2, '0');
230 str += String_convert::int2hex (clocks_per_1_, 2, '0');
231 str += String_convert::int2hex (8, 2, '0');
232 return String_convert::hex2bin (str);
235 Midi_note::Midi_note (Audio_note *a)
238 dynamic_byte_ = 0x7f;
243 Midi_note::get_fine_tuning () const
245 Rational tune = (audio_->pitch_.tone_pitch ()
246 + audio_->transposing_.tone_pitch ()) * Rational (2);
247 tune -= Rational (get_semitone_pitch ());
250 return (int) double (tune);
254 Midi_note::get_semitone_pitch () const
256 return int (double ((audio_->pitch_.tone_pitch ()
257 + audio_->transposing_.tone_pitch ()) * Rational (2)));
261 Midi_note::to_string () const
263 Byte status_byte = (char) (0x90 + channel_);
267 // print warning if fine tuning was needed, HJJ
268 if (get_fine_tuning () != 0)
270 warning (_f ("experimental: temporarily fine tuning (of %d cents) a channel.",
271 get_fine_tuning ()));
273 finetune = PITCH_WHEEL_CENTER;
274 // Move pitch wheel to a shifted position.
275 // The pitch wheel range (of 4 semitones) is multiplied by the cents.
276 finetune += (PITCH_WHEEL_RANGE *get_fine_tuning ()) / (4 * 100);
278 str += ::to_string ((char) (0xE0 + channel_));
279 str += ::to_string ((char) (finetune & 0x7F));
280 str += ::to_string ((char) (finetune >> 7));
281 str += ::to_string ((char) (0x00));
284 str += ::to_string ((char) status_byte);
285 str += ::to_string ((char) (get_semitone_pitch () + c0_pitch_));
286 str += ::to_string ((char)dynamic_byte_);
291 Midi_note_off::Midi_note_off (Midi_note *n)
292 : Midi_note (n->audio_)
295 channel_ = n->channel_;
297 // Anybody who hears any difference, or knows how this works?
298 // 0 should definitely be avoided, notes stick on some sound cards.
299 // 64 is supposed to be neutral
301 aftertouch_byte_ = 64;
305 Midi_note_off::to_string () const
307 Byte status_byte = (char) (0x80 + channel_);
309 string str = ::to_string ((char)status_byte);
310 str += ::to_string ((char) (get_semitone_pitch () + Midi_note::c0_pitch_));
311 str += ::to_string ((char)aftertouch_byte_);
313 if (get_fine_tuning () != 0)
315 // Move pitch wheel back to the central position.
316 str += ::to_string ((char) 0x00);
317 str += ::to_string ((char) (0xE0 + channel_));
318 str += ::to_string ((char) (PITCH_WHEEL_CENTER &0x7F));
319 str += ::to_string ((char) (PITCH_WHEEL_CENTER >> 7));
325 Midi_dynamic::Midi_dynamic (Audio_dynamic *a)
331 Midi_dynamic::to_string () const
333 Byte status_byte = (char) (0xB0 + channel_);
334 string str = ::to_string ((char)status_byte);
337 Main volume controller (per channel):
341 static Real const full_scale = 127;
343 int volume = (int) (audio_->volume_ * full_scale);
346 if (volume > full_scale)
347 volume = (int)full_scale;
349 str += ::to_string ((char)0x07);
350 str += ::to_string ((char)volume);
354 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal *a)
360 Midi_piano_pedal::to_string () const
362 Byte status_byte = (char) (0xB0 + channel_);
363 string str = ::to_string ((char)status_byte);
365 if (audio_->type_string_ == "Sostenuto")
366 str += ::to_string ((char)0x42);
367 else if (audio_->type_string_ == "Sustain")
368 str += ::to_string ((char)0x40);
369 else if (audio_->type_string_ == "UnaCorda")
370 str += ::to_string ((char)0x43);
372 int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
373 str += ::to_string ((char)pedal);
377 Midi_tempo::Midi_tempo (Audio_tempo *a)
383 Midi_tempo::to_string () const
385 int useconds_per_4 = 60 * (int)1e6 / audio_->per_minute_4_;
386 string str = "ff5103";
387 str += String_convert::int2hex (useconds_per_4, 6, '0');
388 return String_convert::hex2bin (str);
391 Midi_text::Midi_text (Audio_text *a)
397 Midi_text::to_string () const
399 string str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
400 str = String_convert::hex2bin (str);
401 str += i2varint_string (audio_->text_string_.length ());
402 str += audio_->text_string_;
406 Midi_track::Midi_track ()
410 // 00 00 00 3B chunk length (59)
411 // 00 FF 58 04 04 02 18 08 time signature
412 // 00 FF 51 03 07 A1 20 tempo
414 // FF 59 02 sf mi Key Signature
425 char const *data_str0 = ""
426 // "00" "ff58" "0404" "0218" "08"
427 // "00" "ff51" "0307" "a120"
428 // why a key at all, in midi?
430 // "00" "ff59" "02" "00" "00"
431 // key: F (scsii-menuetto)
432 // "00" "ff59" "02" "ff" "00"
436 // only for format 0 (currently using format 1)?
437 data_string += String_convert::hex2bin (data_str0);
439 char const *footer_str0 = "00" "ff2f" "00";
440 string footer_string = String_convert::hex2bin (footer_str0);
442 set ("MTrk", data_string, footer_string);
446 Midi_track::add (int delta_ticks, Midi_item *midi)
448 assert (delta_ticks >= 0);
450 Midi_event *e = new Midi_event (delta_ticks, midi);
451 events_.push_back (e);
455 Midi_track::data_string () const
457 string str = Midi_chunk::data_string ();
458 if (do_midi_debugging_global)
461 for (vector<Midi_event*>::const_iterator i (events_.begin());
462 i != events_.end(); i ++)
464 str += (*i)->to_string ();
465 if (do_midi_debugging_global)
473 Midi_item::name () const
475 return this->class_name ();
478 Midi_track::~Midi_track ()
480 junk_pointers (events_);