2 midi-item.cc -- implement Midi items.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "midi-item.hh"
14 #include "string-convert.hh"
15 #include "midi-stream.hh"
16 #include "duration.hh"
17 #include "scm-option.hh"
18 #include "killing-cons.tcc"
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);
76 str += footer_string_;
80 Midi_duration::Midi_duration (Real seconds_f)
86 Midi_duration::to_string () const
88 return String ("<duration: ") + ::to_string (seconds_) + ">";
91 Midi_event::Midi_event (Moment delta_mom, Midi_item* midi)
93 delta_mom_ = delta_mom;
98 ugh. midi output badly broken since grace note hackage.
101 Midi_event::to_string () const
103 Rational rat_dt = (delta_mom_.main_part_ * Rational (384) +
104 delta_mom_.grace_part_ * Rational (100))*Rational (4);
105 int delta_i = int (rat_dt);
107 String delta_string = Midi_item::i2varint_string (delta_i);
108 String midi_string = midi_->to_string ();
109 assert (midi_string.length ());
110 return delta_string + midi_string;
114 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
118 String format_string = String_convert::int2hex (format_i, 4, '0');
119 str += String_convert::hex2bin (format_string);
121 String tracks_string = String_convert::int2hex (tracks_i, 4, '0');
122 str += String_convert::hex2bin (tracks_string);
124 String tempo_string = String_convert::int2hex (clocks_per_4_i, 4, '0');
125 str += String_convert::hex2bin (tempo_string);
127 set ("MThd", str, "");
130 Midi_instrument::Midi_instrument (Audio_instrument* a)
133 audio_->str_.to_lower ();
137 Midi_instrument::to_string () const
139 Byte program_byte = 0;
145 SCM proc = ly_scheme_function ("midi-program");
146 SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.to_str0 ()));
147 found = (program != SCM_BOOL_F);
149 program_byte = scm_to_int (program);
151 warning (_f ("no such MIDI instrument: `%s'", audio_->str_.to_str0 ()));
153 String str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME: Should be track. -rz
154 str += ::to_string ((char)program_byte);
158 Midi_item::Midi_item ()
163 Midi_item::~Midi_item ()
168 Midi_item::i2varint_string (int i)
170 int buffer_i = i & 0x7f;
171 while ((i >>= 7) > 0)
175 buffer_i += (i & 0x7f);
181 str += ::to_string ((char)buffer_i);
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 = audio_->beats_;
217 int den = audio_->one_beat_;
219 String str = "ff5804";
220 str += String_convert::int2hex (num, 2, '0');
221 str += String_convert::int2hex (intlog2 (den) , 2, '0');
222 str += String_convert::int2hex (clocks_per_1_, 2, '0');
223 str += String_convert::int2hex (8, 2, '0');
224 return String_convert::hex2bin (str);
227 Midi_note::Midi_note (Audio_note* a)
230 dynamic_byte_ = 0x7f;
234 Midi_note::get_length () const
236 Moment m = audio_->length_mom_;
241 Midi_note::get_fine_tuning () const
243 int ft = audio_->pitch_.quartertone_pitch ();
244 ft -= 2 * audio_->pitch_.semitone_pitch ();
245 ft *= 50; // 1 quarter tone = 50 cents
250 Midi_note::get_pitch () const
252 int p = audio_->pitch_.semitone_pitch () + audio_->transposing_;
255 warning (_ ("silly pitch"));
262 Midi_note::to_string () const
264 Byte status_byte = (char) (0x90 + channel_);
268 // print warning if fine tuning was needed, HJJ
269 if (get_fine_tuning () != 0)
271 warning (_f ("Experimental: temporarily fine tuning (of %d cents) a channel.",
272 get_fine_tuning ()));
274 finetune = PITCH_WHEEL_CENTER;
275 // Move pitch wheel to a shifted position.
276 // The pitch wheel range (of 4 semitones) is multiplied by the cents.
277 finetune += (PITCH_WHEEL_RANGE * get_fine_tuning ()) / (4 * 100);
279 str += ::to_string ((char) (0xE0 + channel_));
280 str += ::to_string ((char) (finetune & 0x7F));
281 str += ::to_string ((char) (finetune >> 7));
282 str += ::to_string ((char) (0x00));
285 str += ::to_string ((char)status_byte);
286 str += ::to_string ((char) (get_pitch () + c0_pitch_i_));
287 str += ::to_string ((char)dynamic_byte_);
292 Midi_note_off::Midi_note_off (Midi_note* n)
293 : Midi_note (n->audio_)
296 channel_ = n->channel_;
298 // Anybody who hears any difference, or knows how this works?
299 // 0 should definitely be avoided, notes stick on some sound cards.
300 // 64 is supposed to be neutral
302 aftertouch_byte_ = 64;
306 Midi_note_off::to_string () const
308 Byte status_byte = (char) (0x80 + channel_);
310 String str = ::to_string ((char)status_byte);
311 str += ::to_string ((char) (get_pitch () + Midi_note::c0_pitch_i_));
312 str += ::to_string ((char)aftertouch_byte_);
314 if (get_fine_tuning () != 0)
316 // Move pitch wheel back to the central position.
317 str += ::to_string ((char) 0x00);
318 str += ::to_string ((char) (0xE0 + channel_));
319 str += ::to_string ((char) (PITCH_WHEEL_CENTER & 0x7F));
320 str += ::to_string ((char) (PITCH_WHEEL_CENTER >> 7));
326 Midi_dynamic::Midi_dynamic (Audio_dynamic* a)
332 Midi_dynamic::to_string () const
334 Byte status_byte = (char) (0xB0 + channel_);
335 String str = ::to_string ((char)status_byte);
338 Main volume controller (per channel):
342 static Real const full_scale = 127;
344 int volume = (int) (audio_->volume_*full_scale);
347 if (volume > full_scale)
348 volume = (int)full_scale;
350 str += ::to_string ((char)0x07);
351 str += ::to_string ((char)volume);
355 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal* a)
361 Midi_piano_pedal::to_string () const
363 Byte status_byte = (char) (0xB0 + channel_);
364 String str = ::to_string ((char)status_byte);
366 if (audio_->type_string_ == "Sostenuto")
367 str += ::to_string ((char)0x42);
368 else if (audio_->type_string_ == "Sustain")
369 str += ::to_string ((char)0x40);
370 else if (audio_->type_string_ == "UnaCorda")
371 str += ::to_string ((char)0x43);
373 int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
374 str += ::to_string ((char)pedal);
378 Midi_tempo::Midi_tempo (Audio_tempo* a)
384 Midi_tempo::to_string () const
386 int useconds_per_4_i = 60 * (int)1e6 / audio_->per_minute_4_;
387 String str = "ff5103";
388 str += String_convert::int2hex (useconds_per_4_i, 6, '0');
389 return String_convert::hex2bin (str);
392 Midi_text::Midi_text (Audio_text* a)
398 Midi_text::to_string () const
400 String str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
401 str = String_convert::hex2bin (str);
402 str += i2varint_string (audio_->text_string_.length ());
403 str += audio_->text_string_;
407 Midi_track::Midi_track ()
411 // 00 00 00 3B chunk length (59)
412 // 00 FF 58 04 04 02 18 08 time signature
413 // 00 FF 51 03 07 A1 20 tempo
415 // FF 59 02 sf mi Key Signature
426 char const* data_str0 = ""
427 // "00" "ff58" "0404" "0218" "08"
428 // "00" "ff51" "0307" "a120"
429 // why a key at all, in midi?
431 // "00" "ff59" "02" "00" "00"
432 // key: F (scsii-menuetto)
433 // "00" "ff59" "02" "ff" "00"
437 // only for format 0 (currently using format 1)?
438 data_string += String_convert::hex2bin (data_str0);
440 char const* footer_str0 = "00" "ff2f" "00";
441 String footer_string = String_convert::hex2bin (footer_str0);
443 set ("MTrk", data_string, footer_string);
447 Midi_track::add (Moment delta_time_mom, Midi_item* midi)
449 assert (delta_time_mom >= Moment (0));
451 Midi_event * e = new Midi_event (delta_time_mom, midi);
452 event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
456 Midi_track::data_string () const
458 String str = Midi_chunk::data_string ();
459 if (midi_debug_global_b)
461 for (Cons<Midi_event> *i=event_p_list_.head_; i; i = i->next_)
463 str += i->car_->to_string ();
464 if (midi_debug_global_b)