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"
19 #include "killing-cons.tcc"
22 Midi_item::midi_p (Audio_item* a)
24 if (Audio_key* i = dynamic_cast<Audio_key*> (a))
25 return new Midi_key (i);
26 else if (Audio_instrument* i = dynamic_cast<Audio_instrument*> (a))
27 return i->str_.length_i () ? new Midi_instrument (i) : 0;
28 else if (Audio_note* i = dynamic_cast<Audio_note*> (a))
29 return new Midi_note (i);
30 else if (Audio_dynamic* i = dynamic_cast<Audio_dynamic*> (a))
31 return new Midi_dynamic (i);
32 else if (Audio_piano_pedal* i = dynamic_cast<Audio_piano_pedal*> (a))
33 return new Midi_piano_pedal (i);
34 else if (Audio_tempo* i = dynamic_cast<Audio_tempo*> (a))
35 return new Midi_tempo (i);
36 else if (Audio_time_signature* i = dynamic_cast<Audio_time_signature*> (a))
37 return new Midi_time_signature (i);
38 else if (Audio_text* i = dynamic_cast<Audio_text*> (a))
39 //return i->text_str_.length_i () ? new Midi_text (i) : 0;
40 return new Midi_text (i);
49 Midi_chunk::set (String header_str, String data_str, String footer_str)
52 footer_str_ = footer_str;
53 header_str_ = header_str;
57 Midi_chunk::data_str () const
63 Midi_chunk::str () const
65 String str = header_str_;
66 String dat = data_str ();
67 String length_str = String_convert::i2hex_str (dat.length_i ()
68 + footer_str_.length_i (), 8, '0');
69 length_str = String_convert::hex2bin_str (length_str);
76 Midi_duration::Midi_duration (Real seconds_f)
78 seconds_f_ = seconds_f;
82 Midi_duration::str () const
84 return String ("<duration: ") + to_str (seconds_f_) + ">";
87 Midi_event::Midi_event (Moment delta_mom, Midi_item* midi_p)
89 delta_mom_ = delta_mom;
94 Midi_event::str () const
96 int delta_i = delta_mom_ * Moment (384 * 4); // ugh.
98 String delta_str = Midi_item::i2varint_str (delta_i);
99 String midi_str = midi_p_->str ();
100 assert (midi_str.length_i ());
101 return delta_str + midi_str;
105 Midi_header::Midi_header (int format_i, int tracks_i, int clocks_per_4_i)
109 String format_str = String_convert::i2hex_str (format_i, 4, '0');
110 str += String_convert::hex2bin_str (format_str);
112 String tracks_str = String_convert::i2hex_str (tracks_i, 4, '0');
113 str += String_convert::hex2bin_str (tracks_str);
115 String tempo_str = String_convert::i2hex_str (clocks_per_4_i, 4, '0');
116 str += String_convert::hex2bin_str (tempo_str);
118 set ("MThd", str, "");
121 Midi_instrument::Midi_instrument (Audio_instrument* a)
124 audio_l_->str_.to_lower ();
128 Midi_instrument::str() const
130 Byte program_byte = 0;
132 SCM proc = scm_eval2 (ly_symbol2scm ("midi-program"), SCM_EOL);
133 SCM program = gh_call1 (proc, ly_symbol2scm (audio_l_->str_.ch_C()));
134 found = (program != SCM_BOOL_F);
136 program_byte = gh_scm2int(program);
138 warning (_f ("no such instrument: `%s'", audio_l_->str_.ch_C ()));
140 String str = to_str ((char) (0xc0 + channel_i_)); //YIKES! FIXME: Should be track. -rz
141 str += to_str ((char)program_byte);
145 Midi_item::Midi_item ()
150 Midi_item::~Midi_item ()
155 Midi_item::i2varint_str (int i)
157 int buffer_i = i & 0x7f;
158 while ((i >>= 7) > 0)
162 buffer_i += (i & 0x7f);
168 str += to_str ((char)buffer_i);
177 Midi_key::Midi_key (Audio_key*a)
183 Midi_key::str () const
185 String str = "ff5902";
186 str += String_convert::i2hex_str (audio_l_->accidentals_, 2, '0');
187 if (audio_l_->major_)
188 str += String_convert::i2hex_str (0, 2, '0');
190 str += String_convert::i2hex_str (1, 2, '0');
191 return String_convert::hex2bin_str (str);
194 Midi_time_signature::Midi_time_signature (Audio_time_signature* a)
197 clocks_per_1_i_ = 18;
201 Midi_time_signature::str () const
203 int num_i = audio_l_->beats_i_;
204 int den_i = audio_l_->one_beat_i_;
206 String str = "ff5804";
207 str += String_convert::i2hex_str (num_i, 2, '0');
208 str += String_convert::i2hex_str (intlog2 (den_i) , 2, '0');
209 str += String_convert::i2hex_str (clocks_per_1_i_, 2, '0');
210 str += String_convert::i2hex_str (8, 2, '0');
211 return String_convert::hex2bin_str (str);
214 Midi_note::Midi_note (Audio_note* a)
217 dynamic_byte_ = 0x7f;
221 Midi_note::length_mom () const
223 Moment m = audio_l_->length_mom_;
225 if (m < Moment (1, 1000))
227 warning (_ ("silly duration"));
235 Midi_note::pitch_i () const
237 int p = audio_l_->pitch_.semitone_pitch () + audio_l_->transposing_i_;
240 warning (_ ("silly pitch"));
247 Midi_note::str () const
249 Byte status_byte = (char) (0x90 + channel_i_);
251 String str = to_str ((char)status_byte);
252 str += to_str ((char) (pitch_i () + c0_pitch_i_c_));
254 str += to_str ((char)dynamic_byte_);
258 Midi_note_off::Midi_note_off (Midi_note* n)
259 : Midi_note (n->audio_l_)
262 channel_i_ = n->channel_i_;
264 // Anybody who hears any difference, or knows how this works?
265 // 0 should definitely be avoided, notes stick on some sound cards.
266 // 64 is supposed to be neutral
268 aftertouch_byte_ = 64;
272 Midi_note_off::str () const
274 Byte status_byte = (char) (0x80 + channel_i_);
276 String str = to_str ((char)status_byte);
277 str += to_str ((char) (pitch_i () + Midi_note::c0_pitch_i_c_));
278 str += to_str ((char)aftertouch_byte_);
282 Midi_dynamic::Midi_dynamic (Audio_dynamic* a)
288 Midi_dynamic::str () const
290 Byte status_byte = (char) (0xB0 + channel_i_);
291 String str = to_str ((char)status_byte);
294 Main volume controller (per channel):
298 static Real const full_scale = 127;
300 int volume = (int) (audio_l_->volume_*full_scale);
303 if (volume > full_scale)
304 volume = (int)full_scale;
306 str += to_str ((char)0x07);
307 str += to_str ((char)volume);
311 Midi_piano_pedal::Midi_piano_pedal (Audio_piano_pedal* a)
317 Midi_piano_pedal::str () const
319 Byte status_byte = (char) (0xB0 + channel_i_);
320 String str = to_str ((char)status_byte);
322 if (audio_l_->type_str_ == "Sostenuto")
323 str += to_str ((char)0x42);
324 else if (audio_l_->type_str_ == "Sustain")
325 str += to_str ((char)0x40);
326 else if (audio_l_->type_str_ == "UnaChorda")
327 str += to_str ((char)0x43);
329 int pedal = ((1 - audio_l_->dir_) / 2) * 0x7f;
330 str += to_str ((char)pedal);
334 Midi_tempo::Midi_tempo (Audio_tempo* a)
340 Midi_tempo::str () const
342 int useconds_per_4_i = 60 * (int)1e6 / audio_l_->per_minute_4_i_;
343 String str = "ff5103";
344 str += String_convert::i2hex_str (useconds_per_4_i, 6, '0');
345 return String_convert::hex2bin_str (str);
348 Midi_text::Midi_text (Audio_text* a)
354 Midi_text::str () const
356 String str = "ff" + String_convert::i2hex_str (audio_l_->type_, 2, '0');
357 str = String_convert::hex2bin_str (str);
358 str += i2varint_str (audio_l_->text_str_.length_i ());
359 str += audio_l_->text_str_;
363 Midi_track::Midi_track ()
367 // 00 00 00 3B chunk length (59)
368 // 00 FF 58 04 04 02 18 08 time signature
369 // 00 FF 51 03 07 A1 20 tempo
371 // FF 59 02 sf mi Key Signature
382 char const* data_ch_C = ""
383 // "00" "ff58" "0404" "0218" "08"
384 // "00" "ff51" "0307" "a120"
385 // why a key at all, in midi?
387 // "00" "ff59" "02" "00" "00"
388 // key: F (scsii-menuetto)
389 // "00" "ff59" "02" "ff" "00"
393 // only for format 0 (currently using format 1)?
394 data_str += String_convert::hex2bin_str (data_ch_C);
396 char const* footer_ch_C = "00" "ff2f" "00";
397 String footer_str = String_convert::hex2bin_str (footer_ch_C);
399 set ("MTrk", data_str, footer_str);
403 Midi_track::add (Moment delta_time_mom, Midi_item* midi_p)
405 assert (delta_time_mom >= Moment (0));
407 Midi_event * e = new Midi_event (delta_time_mom, midi_p);
408 event_p_list_.append (new Killing_cons<Midi_event> (e, 0));
412 Midi_track::data_str () const
414 String str = Midi_chunk::data_str ();
415 if (midi_debug_global_b)
417 for (Cons<Midi_event> *i=event_p_list_.head_; i; i = i->next_)
419 str += i->car_->str ();
420 if (midi_debug_global_b)