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>
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"
20 #include "killing-cons.tcc"
22 #define PITCH_WHEEL_TOP 0x3FFF
23 #define PITCH_WHEEL_CENTER 0x2000
24 #define PITCH_WHEEL_BOTTOM 0x0000
25 #define PITCH_WHEEL_RANGE (PITCH_WHEEL_TOP - PITCH_WHEEL_BOTTOM)
28 Midi_item::get_midi (Audio_item
* a
)
30 if (Audio_key
* i
= dynamic_cast<Audio_key
*> (a
))
31 return new Midi_key (i
);
32 else if (Audio_instrument
* i
= dynamic_cast<Audio_instrument
*> (a
))
33 return i
->str_
.length () ? new Midi_instrument (i
) : 0;
34 else if (Audio_note
* i
= dynamic_cast<Audio_note
*> (a
))
35 return new Midi_note (i
);
36 else if (Audio_dynamic
* i
= dynamic_cast<Audio_dynamic
*> (a
))
37 return new Midi_dynamic (i
);
38 else if (Audio_piano_pedal
* i
= dynamic_cast<Audio_piano_pedal
*> (a
))
39 return new Midi_piano_pedal (i
);
40 else if (Audio_tempo
* i
= dynamic_cast<Audio_tempo
*> (a
))
41 return new Midi_tempo (i
);
42 else if (Audio_time_signature
* i
= dynamic_cast<Audio_time_signature
*> (a
))
43 return new Midi_time_signature (i
);
44 else if (Audio_text
* i
= dynamic_cast<Audio_text
*> (a
))
45 //return i->text_string_.length () ? new Midi_text (i) : 0;
46 return new Midi_text (i
);
55 Midi_chunk::set (String header_string
, String data_string
, String footer_string
)
57 data_string_
= data_string
;
58 footer_string_
= footer_string
;
59 header_string_
= header_string
;
63 Midi_chunk::data_string () const
69 Midi_chunk::to_string () const
71 String str
= header_string_
;
72 String dat
= data_string ();
73 String length_string
= String_convert::int2hex (dat
.length ()
74 + footer_string_
.length (), 8, '0');
75 length_string
= String_convert::hex2bin (length_string
);
78 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
= int (rat_dt
);
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
;
116 Midi_header::Midi_header (int format_i
, int tracks_i
, int clocks_per_4_i
)
120 String format_string
= String_convert::int2hex (format_i
, 4, '0');
121 str
+= String_convert::hex2bin (format_string
);
123 String tracks_string
= String_convert::int2hex (tracks_i
, 4, '0');
124 str
+= String_convert::hex2bin (tracks_string
);
126 String tempo_string
= String_convert::int2hex (clocks_per_4_i
, 4, '0');
127 str
+= String_convert::hex2bin (tempo_string
);
129 set ("MThd", str
, "");
132 Midi_instrument::Midi_instrument (Audio_instrument
* a
)
135 audio_
->str_
.to_lower ();
139 Midi_instrument::to_string () const
141 Byte program_byte
= 0;
147 SCM proc
= ly_scheme_function ("midi-program");
148 SCM program
= scm_call_1 (proc
, ly_symbol2scm (audio_
->str_
.to_str0 ()));
149 found
= (program
!= SCM_BOOL_F
);
151 program_byte
= ly_scm2int (program
);
153 warning (_f ("no such MIDI instrument: `%s'", audio_
->str_
.to_str0 ()));
155 String str
= ::to_string ((char) (0xc0 + channel_
)); //YIKES! FIXME: Should be track. -rz
156 str
+= ::to_string ((char)program_byte
);
160 Midi_item::Midi_item ()
165 Midi_item::~Midi_item ()
170 Midi_item::i2varint_string (int i
)
172 int buffer_i
= i
& 0x7f;
173 while ((i
>>= 7) > 0)
177 buffer_i
+= (i
& 0x7f);
183 str
+= ::to_string ((char)buffer_i
);
192 Midi_key::Midi_key (Audio_key
*a
)
198 Midi_key::to_string () const
200 String str
= "ff5902";
201 str
+= String_convert::int2hex (audio_
->accidentals_
, 2, '0');
203 str
+= String_convert::int2hex (0, 2, '0');
205 str
+= String_convert::int2hex (1, 2, '0');
206 return String_convert::hex2bin (str
);
209 Midi_time_signature::Midi_time_signature (Audio_time_signature
* a
)
216 Midi_time_signature::to_string () const
218 int num
= audio_
->beats_
;
219 int den
= audio_
->one_beat_
;
221 String str
= "ff5804";
222 str
+= String_convert::int2hex (num
, 2, '0');
223 str
+= String_convert::int2hex (intlog2 (den
) , 2, '0');
224 str
+= String_convert::int2hex (clocks_per_1_
, 2, '0');
225 str
+= String_convert::int2hex (8, 2, '0');
226 return String_convert::hex2bin (str
);
229 Midi_note::Midi_note (Audio_note
* a
)
232 dynamic_byte_
= 0x7f;
236 Midi_note::get_length () const
238 Moment m
= audio_
->length_mom_
;
243 Midi_note::get_fine_tuning () const
245 int ft
= audio_
->pitch_
.quartertone_pitch ();
246 ft
-= 2 * audio_
->pitch_
.semitone_pitch ();
247 ft
*= 50; // 1 quarter tone = 50 cents
252 Midi_note::get_pitch () const
254 int p
= audio_
->pitch_
.semitone_pitch () + audio_
->transposing_
;
257 warning (_ ("silly pitch"));
264 Midi_note::to_string () const
266 Byte status_byte
= (char) (0x90 + channel_
);
270 // print warning if fine tuning was needed, HJJ
271 if (get_fine_tuning () != 0)
273 warning (_f ("Experimental: temporarily fine tuning (of %d cents) a channel.",
274 get_fine_tuning ()));
276 finetune
= PITCH_WHEEL_CENTER
;
277 // Move pitch wheel to a shifted position.
278 // The pitch wheel range (of 4 semitones) is multiplied by the cents.
279 finetune
+= (PITCH_WHEEL_RANGE
* get_fine_tuning ()) / (4 * 100);
281 str
+= ::to_string ((char) (0xE0 + channel_
));
282 str
+= ::to_string ((char) (finetune
& 0x7F));
283 str
+= ::to_string ((char) (finetune
>> 7));
284 str
+= ::to_string ((char) (0x00));
287 str
+= ::to_string ((char)status_byte
);
288 str
+= ::to_string ((char) (get_pitch () + c0_pitch_i_
));
289 str
+= ::to_string ((char)dynamic_byte_
);
294 Midi_note_off::Midi_note_off (Midi_note
* n
)
295 : Midi_note (n
->audio_
)
298 channel_
= n
->channel_
;
300 // Anybody who hears any difference, or knows how this works?
301 // 0 should definitely be avoided, notes stick on some sound cards.
302 // 64 is supposed to be neutral
304 aftertouch_byte_
= 64;
308 Midi_note_off::to_string () const
310 Byte status_byte
= (char) (0x80 + channel_
);
312 String str
= ::to_string ((char)status_byte
);
313 str
+= ::to_string ((char) (get_pitch () + Midi_note::c0_pitch_i_
));
314 str
+= ::to_string ((char)aftertouch_byte_
);
316 if (get_fine_tuning () != 0)
318 // Move pitch wheel back to the central position.
319 str
+= ::to_string ((char) 0x00);
320 str
+= ::to_string ((char) (0xE0 + channel_
));
321 str
+= ::to_string ((char) (PITCH_WHEEL_CENTER
& 0x7F));
322 str
+= ::to_string ((char) (PITCH_WHEEL_CENTER
>> 7));
328 Midi_dynamic::Midi_dynamic (Audio_dynamic
* a
)
334 Midi_dynamic::to_string () const
336 Byte status_byte
= (char) (0xB0 + channel_
);
337 String str
= ::to_string ((char)status_byte
);
340 Main volume controller (per channel):
344 static Real
const full_scale
= 127;
346 int volume
= (int) (audio_
->volume_
*full_scale
);
349 if (volume
> full_scale
)
350 volume
= (int)full_scale
;
352 str
+= ::to_string ((char)0x07);
353 str
+= ::to_string ((char)volume
);
357 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal
* a
)
363 Midi_piano_pedal::to_string () const
365 Byte status_byte
= (char) (0xB0 + channel_
);
366 String str
= ::to_string ((char)status_byte
);
368 if (audio_
->type_string_
== "Sostenuto")
369 str
+= ::to_string ((char)0x42);
370 else if (audio_
->type_string_
== "Sustain")
371 str
+= ::to_string ((char)0x40);
372 else if (audio_
->type_string_
== "UnaCorda")
373 str
+= ::to_string ((char)0x43);
375 int pedal
= ((1 - audio_
->dir_
) / 2) * 0x7f;
376 str
+= ::to_string ((char)pedal
);
380 Midi_tempo::Midi_tempo (Audio_tempo
* a
)
386 Midi_tempo::to_string () const
388 int useconds_per_4_i
= 60 * (int)1e6
/ audio_
->per_minute_4_
;
389 String str
= "ff5103";
390 str
+= String_convert::int2hex (useconds_per_4_i
, 6, '0');
391 return String_convert::hex2bin (str
);
394 Midi_text::Midi_text (Audio_text
* a
)
400 Midi_text::to_string () const
402 String str
= "ff" + String_convert::int2hex (audio_
->type_
, 2, '0');
403 str
= String_convert::hex2bin (str
);
404 str
+= i2varint_string (audio_
->text_string_
.length ());
405 str
+= audio_
->text_string_
;
409 Midi_track::Midi_track ()
413 // 00 00 00 3B chunk length (59)
414 // 00 FF 58 04 04 02 18 08 time signature
415 // 00 FF 51 03 07 A1 20 tempo
417 // FF 59 02 sf mi Key Signature
428 char const* data_str0
= ""
429 // "00" "ff58" "0404" "0218" "08"
430 // "00" "ff51" "0307" "a120"
431 // why a key at all, in midi?
433 // "00" "ff59" "02" "00" "00"
434 // key: F (scsii-menuetto)
435 // "00" "ff59" "02" "ff" "00"
439 // only for format 0 (currently using format 1)?
440 data_string
+= String_convert::hex2bin (data_str0
);
442 char const* footer_str0
= "00" "ff2f" "00";
443 String footer_string
= String_convert::hex2bin (footer_str0
);
445 set ("MTrk", data_string
, footer_string
);
449 Midi_track::add (Moment delta_time_mom
, Midi_item
* midi
)
451 assert (delta_time_mom
>= Moment (0));
453 Midi_event
* e
= new Midi_event (delta_time_mom
, midi
);
454 event_p_list_
.append (new Killing_cons
<Midi_event
> (e
, 0));
458 Midi_track::data_string () const
460 String str
= Midi_chunk::data_string ();
461 if (midi_debug_global_b
)
463 for (Cons
<Midi_event
> *i
=event_p_list_
.head_
; i
; i
= i
->next_
)
465 str
+= i
->car_
->to_string ();
466 if (midi_debug_global_b
)