2 midi-item.cc -- implement Midi items.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2006 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 ugh. midi output badly broken since grace note hackage.
103 Midi_event::to_string () const
105 Rational rat_dt = (delta_mom_.main_part_ * Rational (384)
106 + delta_mom_.grace_part_ * Rational (100)) * Rational (4);
107 int delta_i = rat_dt.to_int ();
109 string delta_string = Midi_item::i2varint_string (delta_i);
110 string midi_string = midi_->to_string ();
111 assert (midi_string.length ());
112 return delta_string + midi_string;
115 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
119 string format_string = String_convert::int2hex (format_i, 4, '0');
120 str += String_convert::hex2bin (format_string);
122 string tracks_string = String_convert::int2hex (tracks_i, 4, '0');
123 str += String_convert::hex2bin (tracks_string);
125 string tempo_string = String_convert::int2hex (clocks_per_4_i, 4, '0');
126 str += String_convert::hex2bin (tempo_string);
128 set ("MThd", str, "");
131 Midi_instrument::Midi_instrument (Audio_instrument *a)
134 audio_->str_ = String_convert::to_lower (audio_->str_);
138 Midi_instrument::to_string () const
140 Byte program_byte = 0;
146 SCM proc = ly_lily_module_constant ("midi-program");
147 SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.c_str ()));
148 found = (program != SCM_BOOL_F);
150 program_byte = scm_to_int (program);
152 warning (_f ("no such MIDI instrument: `%s'", audio_->str_.c_str ()));
154 string str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME : Should be track. -rz
155 str += ::to_string ((char)program_byte);
159 Midi_item::Midi_item ()
164 Midi_item::~Midi_item ()
169 Midi_item::i2varint_string (int i)
171 int buffer_i = i & 0x7f;
172 while ((i >>= 7) > 0)
176 buffer_i += (i & 0x7f);
182 str += ::to_string ((char)buffer_i);
191 Midi_key::Midi_key (Audio_key *a)
197 Midi_key::to_string () const
199 string str = "ff5902";
200 str += String_convert::int2hex (audio_->accidentals_, 2, '0');
202 str += String_convert::int2hex (0, 2, '0');
204 str += String_convert::int2hex (1, 2, '0');
205 return String_convert::hex2bin (str);
208 Midi_time_signature::Midi_time_signature (Audio_time_signature *a)
215 Midi_time_signature::to_string () const
217 int num = abs (audio_->beats_);
220 warning ("Time signature with more than 255 beats. Truncating");
224 int den = audio_->one_beat_;
228 string str = "ff5804";
229 str += String_convert::int2hex (num, 2, '0');
230 str += String_convert::int2hex (intlog2 (den), 2, '0');
231 str += String_convert::int2hex (clocks_per_1_, 2, '0');
232 str += String_convert::int2hex (8, 2, '0');
233 return String_convert::hex2bin (str);
236 Midi_note::Midi_note (Audio_note *a)
239 dynamic_byte_ = 0x7f;
243 Midi_note::get_length () const
245 Moment m = audio_->length_mom_;
250 Midi_note::get_fine_tuning () const
252 int ft = audio_->pitch_.quartertone_pitch ();
253 ft -= 2 * audio_->pitch_.semitone_pitch ();
254 ft *= 50; // 1 quarter tone = 50 cents
259 Midi_note::get_pitch () const
261 int p = audio_->pitch_.semitone_pitch () + audio_->transposing_;
264 warning (_ ("silly pitch"));
271 Midi_note::to_string () const
273 Byte status_byte = (char) (0x90 + channel_);
277 // print warning if fine tuning was needed, HJJ
278 if (get_fine_tuning () != 0)
280 warning (_f ("experimental: temporarily fine tuning (of %d cents) a channel.",
281 get_fine_tuning ()));
283 finetune = PITCH_WHEEL_CENTER;
284 // Move pitch wheel to a shifted position.
285 // The pitch wheel range (of 4 semitones) is multiplied by the cents.
286 finetune += (PITCH_WHEEL_RANGE *get_fine_tuning ()) / (4 * 100);
288 str += ::to_string ((char) (0xE0 + channel_));
289 str += ::to_string ((char) (finetune & 0x7F));
290 str += ::to_string ((char) (finetune >> 7));
291 str += ::to_string ((char) (0x00));
294 str += ::to_string ((char)status_byte);
295 str += ::to_string ((char) (get_pitch () + c0_pitch_i_));
296 str += ::to_string ((char)dynamic_byte_);
301 Midi_note_off::Midi_note_off (Midi_note *n)
302 : Midi_note (n->audio_)
305 channel_ = n->channel_;
307 // Anybody who hears any difference, or knows how this works?
308 // 0 should definitely be avoided, notes stick on some sound cards.
309 // 64 is supposed to be neutral
311 aftertouch_byte_ = 64;
315 Midi_note_off::to_string () const
317 Byte status_byte = (char) (0x80 + channel_);
319 string str = ::to_string ((char)status_byte);
320 str += ::to_string ((char) (get_pitch () + Midi_note::c0_pitch_i_));
321 str += ::to_string ((char)aftertouch_byte_);
323 if (get_fine_tuning () != 0)
325 // Move pitch wheel back to the central position.
326 str += ::to_string ((char) 0x00);
327 str += ::to_string ((char) (0xE0 + channel_));
328 str += ::to_string ((char) (PITCH_WHEEL_CENTER &0x7F));
329 str += ::to_string ((char) (PITCH_WHEEL_CENTER >> 7));
335 Midi_dynamic::Midi_dynamic (Audio_dynamic *a)
341 Midi_dynamic::to_string () const
343 Byte status_byte = (char) (0xB0 + channel_);
344 string str = ::to_string ((char)status_byte);
347 Main volume controller (per channel):
351 static Real const full_scale = 127;
353 int volume = (int) (audio_->volume_ * full_scale);
356 if (volume > full_scale)
357 volume = (int)full_scale;
359 str += ::to_string ((char)0x07);
360 str += ::to_string ((char)volume);
364 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal *a)
370 Midi_piano_pedal::to_string () const
372 Byte status_byte = (char) (0xB0 + channel_);
373 string str = ::to_string ((char)status_byte);
375 if (audio_->type_string_ == "Sostenuto")
376 str += ::to_string ((char)0x42);
377 else if (audio_->type_string_ == "Sustain")
378 str += ::to_string ((char)0x40);
379 else if (audio_->type_string_ == "UnaCorda")
380 str += ::to_string ((char)0x43);
382 int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
383 str += ::to_string ((char)pedal);
387 Midi_tempo::Midi_tempo (Audio_tempo *a)
393 Midi_tempo::to_string () const
395 int useconds_per_4_i = 60 * (int)1e6 / audio_->per_minute_4_;
396 string str = "ff5103";
397 str += String_convert::int2hex (useconds_per_4_i, 6, '0');
398 return String_convert::hex2bin (str);
401 Midi_text::Midi_text (Audio_text *a)
407 Midi_text::to_string () const
409 string str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
410 str = String_convert::hex2bin (str);
411 str += i2varint_string (audio_->text_string_.length ());
412 str += audio_->text_string_;
416 Midi_track::Midi_track ()
420 // 00 00 00 3B chunk length (59)
421 // 00 FF 58 04 04 02 18 08 time signature
422 // 00 FF 51 03 07 A1 20 tempo
424 // FF 59 02 sf mi Key Signature
435 char const *data_str0 = ""
436 // "00" "ff58" "0404" "0218" "08"
437 // "00" "ff51" "0307" "a120"
438 // why a key at all, in midi?
440 // "00" "ff59" "02" "00" "00"
441 // key: F (scsii-menuetto)
442 // "00" "ff59" "02" "ff" "00"
446 // only for format 0 (currently using format 1)?
447 data_string += String_convert::hex2bin (data_str0);
449 char const *footer_str0 = "00" "ff2f" "00";
450 string footer_string = String_convert::hex2bin (footer_str0);
452 set ("MTrk", data_string, footer_string);
456 Midi_track::add (Moment delta_time_mom, Midi_item *midi)
458 assert (delta_time_mom >= Moment (0));
460 Midi_event *e = new Midi_event (delta_time_mom, midi);
461 events_.push_back (e);
465 Midi_track::data_string () const
467 string str = Midi_chunk::data_string ();
468 if (do_midi_debugging_global)
471 for (vector<Midi_event*>::const_iterator i (events_.begin());
472 i != events_.end(); i ++)
474 str += (*i)->to_string ();
475 if (do_midi_debugging_global)
483 Midi_item::name () const
485 return this->class_name ();
488 Midi_track::~Midi_track ()
490 junk_pointers (events_);