2 midi-item.cc -- implement Midi items.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 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::midi_p (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_i () ? 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_str_.length_i () ? new Midi_text (i) : 0;
41 return new Midi_text (i);
50 Midi_chunk::set (String header_str, String data_str, String footer_str)
53 footer_str_ = footer_str;
54 header_str_ = header_str;
58 Midi_chunk::data_str () const
64 Midi_chunk::str () const
66 String str = header_str_;
67 String dat = data_str ();
68 String length_str = String_convert::i2hex_str (dat.length_i ()
69 + footer_str_.length_i (), 8, '0');
70 length_str = String_convert::hex2bin_str (length_str);
77 Midi_duration::Midi_duration (Real seconds_f)
79 seconds_f_ = seconds_f;
83 Midi_duration::str () const
85 return String ("<duration: ") + to_str (seconds_f_) + ">";
88 Midi_event::Midi_event (Moment delta_mom, Midi_item* midi_p)
90 delta_mom_ = delta_mom;
95 Midi_event::str () const
97 int delta_i = delta_mom_ * Moment (384 * 4); // ugh.
99 String delta_str = Midi_item::i2varint_str (delta_i);
100 String midi_str = midi_p_->str ();
101 assert (midi_str.length_i ());
102 return delta_str + midi_str;
106 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
110 String format_str = String_convert::i2hex_str (format_i, 4, '0');
111 str += String_convert::hex2bin_str (format_str);
113 String tracks_str = String_convert::i2hex_str (tracks_i, 4, '0');
114 str += String_convert::hex2bin_str (tracks_str);
116 String tempo_str = String_convert::i2hex_str (clocks_per_4_i, 4, '0');
117 str += String_convert::hex2bin_str (tempo_str);
119 set ("MThd", str, "");
122 Midi_instrument::Midi_instrument (Audio_instrument* a)
125 audio_l_->str_.to_lower ();
129 Midi_instrument::str() const
131 Byte program_byte = 0;
133 SCM proc = scm_eval2 (ly_symbol2scm ("midi-program"), SCM_EOL);
134 SCM program = gh_call1 (proc, ly_symbol2scm (audio_l_->str_.ch_C()));
135 found = (program != SCM_BOOL_F);
137 program_byte = gh_scm2int(program);
139 warning (_f ("no such instrument: `%s'", audio_l_->str_.ch_C ()));
141 String str = to_str ((char) (0xc0 + channel_i_)); //YIKES! FIXME: Should be track. -rz
142 str += to_str ((char)program_byte);
146 Midi_item::Midi_item ()
151 Midi_item::~Midi_item ()
156 Midi_item::i2varint_str (int i)
158 int buffer_i = i & 0x7f;
159 while ((i >>= 7) > 0)
163 buffer_i += (i & 0x7f);
169 str += to_str ((char)buffer_i);
178 Midi_key::Midi_key (Audio_key*a)
184 Midi_key::str () const
186 String str = "ff5902";
187 str += String_convert::i2hex_str (audio_l_->accidentals_, 2, '0');
188 if (audio_l_->major_)
189 str += String_convert::i2hex_str (0, 2, '0');
191 str += String_convert::i2hex_str (1, 2, '0');
192 return String_convert::hex2bin_str (str);
195 Midi_time_signature::Midi_time_signature (Audio_time_signature* a)
198 clocks_per_1_i_ = 18;
202 Midi_time_signature::str () const
204 int num = audio_l_->beats_i_;
205 int den = audio_l_->one_beat_i_;
207 String str = "ff5804";
208 str += String_convert::i2hex_str (num, 2, '0');
209 str += String_convert::i2hex_str (intlog2 (den) , 2, '0');
210 str += String_convert::i2hex_str (clocks_per_1_i_, 2, '0');
211 str += String_convert::i2hex_str (8, 2, '0');
212 return String_convert::hex2bin_str (str);
215 Midi_note::Midi_note (Audio_note* a)
218 dynamic_byte_ = 0x7f;
222 Midi_note::length_mom () const
224 Moment m = audio_l_->length_mom_;
226 if (m < Moment (1, 1000))
228 warning (_ ("silly duration"));
236 Midi_note::pitch_i () const
238 int p = audio_l_->pitch_.semitone_pitch () + audio_l_->transposing_i_;
241 warning (_ ("silly pitch"));
248 Midi_note::str () const
250 Byte status_byte = (char) (0x90 + channel_i_);
252 String str = to_str ((char)status_byte);
253 str += to_str ((char) (pitch_i () + c0_pitch_i_c_));
255 str += to_str ((char)dynamic_byte_);
259 Midi_note_off::Midi_note_off (Midi_note* n)
260 : Midi_note (n->audio_l_)
263 channel_i_ = n->channel_i_;
265 // Anybody who hears any difference, or knows how this works?
266 // 0 should definitely be avoided, notes stick on some sound cards.
267 // 64 is supposed to be neutral
269 aftertouch_byte_ = 64;
273 Midi_note_off::str () const
275 Byte status_byte = (char) (0x80 + channel_i_);
277 String str = to_str ((char)status_byte);
278 str += to_str ((char) (pitch_i () + Midi_note::c0_pitch_i_c_));
279 str += to_str ((char)aftertouch_byte_);
283 Midi_dynamic::Midi_dynamic (Audio_dynamic* a)
289 Midi_dynamic::str () const
291 Byte status_byte = (char) (0xB0 + channel_i_);
292 String str = to_str ((char)status_byte);
295 Main volume controller (per channel):
299 static Real const full_scale = 127;
301 int volume = (int) (audio_l_->volume_*full_scale);
304 if (volume > full_scale)
305 volume = (int)full_scale;
307 str += to_str ((char)0x07);
308 str += to_str ((char)volume);
312 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal* a)
318 Midi_piano_pedal::str () const
320 Byte status_byte = (char) (0xB0 + channel_i_);
321 String str = to_str ((char)status_byte);
323 if (audio_l_->type_str_ == "Sostenuto")
324 str += to_str ((char)0x42);
325 else if (audio_l_->type_str_ == "Sustain")
326 str += to_str ((char)0x40);
327 else if (audio_l_->type_str_ == "UnaChorda")
328 str += to_str ((char)0x43);
330 int pedal = ((1 - audio_l_->dir_) / 2) * 0x7f;
331 str += to_str ((char)pedal);
335 Midi_tempo::Midi_tempo (Audio_tempo* a)
341 Midi_tempo::str () const
343 int useconds_per_4_i = 60 * (int)1e6 / audio_l_->per_minute_4_i_;
344 String str = "ff5103";
345 str += String_convert::i2hex_str (useconds_per_4_i, 6, '0');
346 return String_convert::hex2bin_str (str);
349 Midi_text::Midi_text (Audio_text* a)
355 Midi_text::str () const
357 String str = "ff" + String_convert::i2hex_str (audio_l_->type_, 2, '0');
358 str = String_convert::hex2bin_str (str);
359 str += i2varint_str (audio_l_->text_str_.length_i ());
360 str += audio_l_->text_str_;
364 Midi_track::Midi_track ()
368 // 00 00 00 3B chunk length (59)
369 // 00 FF 58 04 04 02 18 08 time signature
370 // 00 FF 51 03 07 A1 20 tempo
372 // FF 59 02 sf mi Key Signature
383 char const* data_ch_C = ""
384 // "00" "ff58" "0404" "0218" "08"
385 // "00" "ff51" "0307" "a120"
386 // why a key at all, in midi?
388 // "00" "ff59" "02" "00" "00"
389 // key: F (scsii-menuetto)
390 // "00" "ff59" "02" "ff" "00"
394 // only for format 0 (currently using format 1)?
395 data_str += String_convert::hex2bin_str (data_ch_C);
397 char const* footer_ch_C = "00" "ff2f" "00";
398 String footer_str = String_convert::hex2bin_str (footer_ch_C);
400 set ("MTrk", data_str, footer_str);
404 Midi_track::add (Moment delta_time_mom, Midi_item* midi_p)
406 assert (delta_time_mom >= Moment (0));
408 Midi_event * e = new Midi_event (delta_time_mom, midi_p);
409 event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
413 Midi_track::data_str () const
415 String str = Midi_chunk::data_str ();
416 if (midi_debug_global_b)
418 for (Cons<Midi_event> *i=event_p_list_.head_; i; i = i->next_)
420 str += i->car_->str ();
421 if (midi_debug_global_b)