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
)