2 midi-item.cc -- implement Midi items.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2003 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"
23 Midi_item::get_midi (Audio_item* a)
25 if (Audio_key* i = dynamic_cast<Audio_key*> (a))
26 return new Midi_key (i);
27 else if (Audio_instrument* i = dynamic_cast<Audio_instrument*> (a))
28 return i->str_.length () ? new Midi_instrument (i) : 0;
29 else if (Audio_note* i = dynamic_cast<Audio_note*> (a))
30 return new Midi_note (i);
31 else if (Audio_dynamic* i = dynamic_cast<Audio_dynamic*> (a))
32 return new Midi_dynamic (i);
33 else if (Audio_piano_pedal* i = dynamic_cast<Audio_piano_pedal*> (a))
34 return new Midi_piano_pedal (i);
35 else if (Audio_tempo* i = dynamic_cast<Audio_tempo*> (a))
36 return new Midi_tempo (i);
37 else if (Audio_time_signature* i = dynamic_cast<Audio_time_signature*> (a))
38 return new Midi_time_signature (i);
39 else if (Audio_text* i = dynamic_cast<Audio_text*> (a))
40 //return i->text_string_.length () ? new Midi_text (i) : 0;
41 return new Midi_text (i);
50 Midi_chunk::set (String header_string, String data_string, String footer_string)
52 data_string_ = data_string;
53 footer_string_ = footer_string;
54 header_string_ = header_string;
58 Midi_chunk::data_string () const
64 Midi_chunk::to_string () const
66 String str = header_string_;
67 String dat = data_string ();
68 String length_string = String_convert::int2hex (dat.length ()
69 + footer_string_.length (), 8, '0');
70 length_string = String_convert::hex2bin (length_string);
73 str += footer_string_;
77 Midi_duration::Midi_duration (Real seconds_f)
83 Midi_duration::to_string () const
85 return String ("<duration: ") + ::to_string (seconds_) + ">";
88 Midi_event::Midi_event (Moment delta_mom, Midi_item* midi)
90 delta_mom_ = delta_mom;
95 ugh. midi output badly broken since grace note hackage.
98 Midi_event::to_string () const
100 Rational rat_dt = (delta_mom_.main_part_ * Rational (384) +
101 delta_mom_.grace_part_ * Rational (100))*Rational (4);
102 int delta_i = int (rat_dt);
104 String delta_string = Midi_item::i2varint_string (delta_i);
105 String midi_string = midi_->to_string ();
106 assert (midi_string.length ());
107 return delta_string + midi_string;
111 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
115 String format_string = String_convert::int2hex (format_i, 4, '0');
116 str += String_convert::hex2bin (format_string);
118 String tracks_string = String_convert::int2hex (tracks_i, 4, '0');
119 str += String_convert::hex2bin (tracks_string);
121 String tempo_string = String_convert::int2hex (clocks_per_4_i, 4, '0');
122 str += String_convert::hex2bin (tempo_string);
124 set ("MThd", str, "");
127 Midi_instrument::Midi_instrument (Audio_instrument* a)
130 audio_->str_.to_lower ();
134 Midi_instrument::to_string () const
136 Byte program_byte = 0;
142 SCM proc = scm_primitive_eval (ly_symbol2scm ("midi-program"));
143 SCM program = gh_call1 (proc, ly_symbol2scm (audio_->str_.to_str0 ()));
144 found = (program != SCM_BOOL_F);
146 program_byte = gh_scm2int(program);
148 warning (_f ("no such MIDI instrument: `%s'", audio_->str_.to_str0 ()));
150 String str = ::to_string ((char) (0xc0 + channel_)); //YIKES! FIXME: Should be track. -rz
151 str += ::to_string ((char)program_byte);
155 Midi_item::Midi_item ()
160 Midi_item::~Midi_item ()
165 Midi_item::i2varint_string (int i)
167 int buffer_i = i & 0x7f;
168 while ((i >>= 7) > 0)
172 buffer_i += (i & 0x7f);
178 str += ::to_string ((char)buffer_i);
187 Midi_key::Midi_key (Audio_key*a)
193 Midi_key::to_string () const
195 String str = "ff5902";
196 str += String_convert::int2hex (audio_->accidentals_, 2, '0');
198 str += String_convert::int2hex (0, 2, '0');
200 str += String_convert::int2hex (1, 2, '0');
201 return String_convert::hex2bin (str);
204 Midi_time_signature::Midi_time_signature (Audio_time_signature* a)
211 Midi_time_signature::to_string () const
213 int num = audio_->beats_;
214 int den = audio_->one_beat_;
216 String str = "ff5804";
217 str += String_convert::int2hex (num, 2, '0');
218 str += String_convert::int2hex (intlog2 (den) , 2, '0');
219 str += String_convert::int2hex (clocks_per_1_, 2, '0');
220 str += String_convert::int2hex (8, 2, '0');
221 return String_convert::hex2bin (str);
224 Midi_note::Midi_note (Audio_note* a)
227 dynamic_byte_ = 0x7f;
231 Midi_note::get_length () const
233 Moment m = audio_->length_mom_;
238 Midi_note::get_pitch () const
240 int p = audio_->pitch_.semitone_pitch () + audio_->transposing_;
243 warning (_ ("silly pitch"));
250 Midi_note::to_string () const
252 Byte status_byte = (char) (0x90 + channel_);
254 String str = ::to_string ((char)status_byte);
255 str += ::to_string ((char) (get_pitch () + c0_pitch_i_));
257 str += ::to_string ((char)dynamic_byte_);
261 Midi_note_off::Midi_note_off (Midi_note* n)
262 : Midi_note (n->audio_)
265 channel_ = n->channel_;
267 // Anybody who hears any difference, or knows how this works?
268 // 0 should definitely be avoided, notes stick on some sound cards.
269 // 64 is supposed to be neutral
271 aftertouch_byte_ = 64;
275 Midi_note_off::to_string () const
277 Byte status_byte = (char) (0x80 + channel_);
279 String str = ::to_string ((char)status_byte);
280 str += ::to_string ((char) (get_pitch () + Midi_note::c0_pitch_i_));
281 str += ::to_string ((char)aftertouch_byte_);
285 Midi_dynamic::Midi_dynamic (Audio_dynamic* a)
291 Midi_dynamic::to_string () const
293 Byte status_byte = (char) (0xB0 + channel_);
294 String str = ::to_string ((char)status_byte);
297 Main volume controller (per channel):
301 static Real const full_scale = 127;
303 int volume = (int) (audio_->volume_*full_scale);
306 if (volume > full_scale)
307 volume = (int)full_scale;
309 str += ::to_string ((char)0x07);
310 str += ::to_string ((char)volume);
314 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal* a)
320 Midi_piano_pedal::to_string () const
322 Byte status_byte = (char) (0xB0 + channel_);
323 String str = ::to_string ((char)status_byte);
325 if (audio_->type_string_ == "Sostenuto")
326 str += ::to_string ((char)0x42);
327 else if (audio_->type_string_ == "Sustain")
328 str += ::to_string ((char)0x40);
329 else if (audio_->type_string_ == "UnaCorda")
330 str += ::to_string ((char)0x43);
332 int pedal = ((1 - audio_->dir_) / 2) * 0x7f;
333 str += ::to_string ((char)pedal);
337 Midi_tempo::Midi_tempo (Audio_tempo* a)
343 Midi_tempo::to_string () const
345 int useconds_per_4_i = 60 * (int)1e6 / audio_->per_minute_4_;
346 String str = "ff5103";
347 str += String_convert::int2hex (useconds_per_4_i, 6, '0');
348 return String_convert::hex2bin (str);
351 Midi_text::Midi_text (Audio_text* a)
357 Midi_text::to_string () const
359 String str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
360 str = String_convert::hex2bin (str);
361 str += i2varint_string (audio_->text_string_.length ());
362 str += audio_->text_string_;
366 Midi_track::Midi_track ()
370 // 00 00 00 3B chunk length (59)
371 // 00 FF 58 04 04 02 18 08 time signature
372 // 00 FF 51 03 07 A1 20 tempo
374 // FF 59 02 sf mi Key Signature
385 char const* data_str0 = ""
386 // "00" "ff58" "0404" "0218" "08"
387 // "00" "ff51" "0307" "a120"
388 // why a key at all, in midi?
390 // "00" "ff59" "02" "00" "00"
391 // key: F (scsii-menuetto)
392 // "00" "ff59" "02" "ff" "00"
396 // only for format 0 (currently using format 1)?
397 data_string += String_convert::hex2bin (data_str0);
399 char const* footer_str0 = "00" "ff2f" "00";
400 String footer_string = String_convert::hex2bin (footer_str0);
402 set ("MTrk", data_string, footer_string);
406 Midi_track::add (Moment delta_time_mom, Midi_item* midi)
408 assert (delta_time_mom >= Moment (0));
410 Midi_event * e = new Midi_event (delta_time_mom, midi);
411 event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
415 Midi_track::data_string () const
417 String str = Midi_chunk::data_string ();
418 if (midi_debug_global_b)
420 for (Cons<Midi_event> *i=event_p_list_.head_; i; i = i->next_)
422 str += i->car_->to_string ();
423 if (midi_debug_global_b)