2 midi-item.cc -- implement Midi items.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
14 #include "string-convert.hh"
15 #include "command-request.hh"
16 #include "musical-request.hh"
17 #include "midi-item.hh"
18 #include "midi-stream.hh"
19 #include "audio-item.hh"
21 Midi_chunk::Midi_chunk()
27 Midi_chunk::add( String str )
33 Midi_chunk::set( String header_str, String data_str, String footer_str )
36 footer_str_ = footer_str;
37 header_str_ = header_str;
41 Midi_chunk::str() const
43 String str = header_str_;
44 String length_str = String_convert::i2hex_str( data_str_.length_i() + footer_str_.length_i(), 8, '0' );
45 length_str = String_convert::hex2bin_str( length_str );
52 Midi_duration::Midi_duration( Real seconds_f )
55 seconds_f_ = seconds_f;
59 Midi_duration::str() const
61 return String( "<duration: " ) + String( seconds_f_ ) + ">";
64 Midi_header::Midi_header( int format_i, int tracks_i, int clocks_per_4_i )
69 String format_str = String_convert::i2hex_str( format_i, 4, '0' );
70 str += String_convert::hex2bin_str( format_str );
72 String tracks_str = String_convert::i2hex_str( tracks_i, 4, '0' );
73 str += String_convert::hex2bin_str( tracks_str );
75 String tempo_str = String_convert::i2hex_str( clocks_per_4_i, 4, '0' );
76 str += String_convert::hex2bin_str( tempo_str );
78 set( "MThd", str, "" );
81 char const* const instrument_name_sz_a_[ ] = {
83 /* default is usually piano */
87 /* 1 */ "acoustic grand",
88 /* 2 */ "bright acoustic",
89 /* 3 */ "electric grand",
91 /* 5 */ "electric piano 1",
92 /* 6 */ "electric piano 2",
93 /* 7 */ "harpsichord",
96 /* (9-16 chrom percussion) */
98 /* 10 */ "glockenspiel",
100 /* 12 */ "vibraphone",
102 /* 14 */ "xylophone",
103 /* 15 */ "tubular bells",
107 /* 17 */ "drawbar organ",
108 /* 18 */ "percussive organ",
109 /* 19 */ "rock organ",
110 /* 20 */ "church organ",
111 /* 21 */ "reed organ",
112 /* 22 */ "accoridan",
113 /* 23 */ "harmonica",
114 /* 24 */ "tango accordian",
117 /* 25 */ "acoustic guitar(nylon)",
118 /* 26 */ "acoustic guitar(steel)",
119 /* 27 */ "electric guitar(jazz)",
120 /* 28 */ "electric guitar(clean)",
121 /* 29 */ "electric guitar(muted)",
122 /* 30 */ "overdriven guitar",
123 /* 31 */ "distortion guitar",
124 /* 32 */ "guitar harmonics",
127 /* 33 */ "acoustic bass",
128 /* 34 */ "electric bass(finger)",
129 /* 35 */ "electric bass(pick)",
130 /* 36 */ "fretless bass",
131 /* 37 */ "slap bass 1",
132 /* 38 */ "slap bass 2",
133 /* 39 */ "synth bass 1",
134 /* 40 */ "synth bass 2",
136 /* (41-48 strings) */
140 /* 44 */ "contrabass",
141 /* 45 */ "tremolo strings",
142 /* 46 */ "pizzicato strings",
143 /* 47 */ "orchestral strings",
146 /* (49-56 ensemble) */
147 /* 49 */ "string ensemble 1",
148 /* 50 */ "string ensemble 2",
149 /* 51 */ "synthstrings 1",
150 /* 52 */ "synthstrings 2",
151 /* 53 */ "choir aahs",
152 /* 54 */ "voice oohs",
153 /* 55 */ "synth voice",
154 /* 56 */ "orchestra hit",
160 /* 60 */ "muted trumpet",
161 /* 61 */ "french horn",
162 /* 62 */ "brass section",
163 /* 63 */ "synthbrass 1",
164 /* 64 */ "synthbrass 2",
167 /* 65 */ "soprano sax",
169 /* 67 */ "tenor sax",
170 /* 68 */ "baritone sax",
172 /* 70 */ "english horn",
180 /* 76 */ "pan flute",
181 /* 77 */ "blown bottle",
182 /* 78 */ "skakuhachi",
186 /* (81-88 synth lead) */
187 /* 81 */ "lead 1 (square)",
188 /* 82 */ "lead 2 (sawtooth)",
189 /* 83 */ "lead 3 (calliope)",
190 /* 84 */ "lead 4 (chiff)",
191 /* 85 */ "lead 5 (charang)",
192 /* 86 */ "lead 6 (voice)",
193 /* 87 */ "lead 7 (fifths)",
194 /* 88 */ "lead 8 (bass+lead)",
196 /* (89-96 synth pad) */
197 /* 89 */ "pad 1 (new age)",
198 /* 90 */ "pad 2 (warm)",
199 /* 91 */ "pad 3 (polysynth)",
200 /* 92 */ "pad 4 (choir)",
201 /* 93 */ "pad 5 (bowed)",
202 /* 94 */ "pad 6 (metallic)",
203 /* 95 */ "pad 7 (halo)",
204 /* 96 */ "pad 8 (sweep)",
206 /* (97-104 synth effects) */
207 /* 97 */ "fx 1 (rain)",
208 /* 98 */ "fx 2 (soundtrack)",
209 /* 99 */ "fx 3 (crystal)",
210 /* 100 */ "fx 4 (atmosphere)",
211 /* 101 */ "fx 5 (brightness)",
212 /* 102 */ "fx 6 (goblins)",
213 /* 103 */ "fx 7 (echoes)",
214 /* 104 */ "fx 8 (sci-fi)",
216 /* (105-112 ethnic) */
219 /* 107 */ "shamisen",
226 /* (113-120 percussive) */
227 /* 113 */ "tinkle bell",
229 /* 115 */ "steel drums",
230 /* 116 */ "woodblock",
231 /* 117 */ "taiko drum",
232 /* 118 */ "melodic tom",
233 /* 119 */ "synth drum",
234 /* 120 */ "reverse cymbal",
236 /* (121-128 sound effects) */
237 /* 121 */ "guitar fret noise",
238 /* 122 */ "breath noise",
239 /* 123 */ "seashore",
240 /* 124 */ "bird tweet",
241 /* 125 */ "telephone ring",
242 /* 126 */ "helicopter",
243 /* 127 */ "applause",
248 Midi_instrument::Midi_instrument( int channel_i, String instrument_str )
251 instrument_str_ = instrument_str;
252 instrument_str_.to_lower();
253 channel_i_ = channel_i;
257 Midi_instrument::str() const
259 // ugh, does not work...
261 Byte program_byte = 0;
262 for ( int i = 0; instrument_name_sz_a_[i]; i++ )
263 if ( instrument_str_ == String(instrument_name_sz_a_[ i ] )) {
264 program_byte = (Byte)i;
267 if ( program_byte ) {
268 String str = String( (char)( 0xc0 + channel_i_ ) );
269 str += String( (char)program_byte );
275 Midi_item::Midi_item( Audio_item* audio_item_l )
277 audio_item_l_ = audio_item_l;
282 Midi_item::output( Midi_stream* midi_stream_l ) const
284 *midi_stream_l << str();
288 Midi_item::i2varint_str( int i )
290 int buffer_i = i & 0x7f;
291 while ( (i >>= 7) > 0 ) {
294 buffer_i += (i & 0x7f);
299 str += (char)buffer_i;
300 if ( buffer_i & 0x80 )
308 Midi_key::Midi_key( Audio_item* audio_item_l )
309 : Midi_item( audio_item_l )
314 Midi_key::str() const
316 Key_change_req* k = audio_item_l_->req_l_->command()->keychange();
317 int sharps_i = k->sharps_i();
318 int flats_i = k->flats_i();
320 // midi cannot handle non-conventional keys
321 if ( flats_i && sharps_i )
323 int accidentals_i = sharps_i - flats_i;
325 String str = "ff5902";
326 str += String_convert::i2hex_str( accidentals_i, 2, '0' );
327 int minor_i = k->minor_b();
328 str += String_convert::i2hex_str( minor_i, 2, '0' );
329 return String_convert::hex2bin_str( str );
332 Midi_note::Midi_note( Audio_item* audio_item_l )
333 : Midi_item( audio_item_l )
336 dynamic_byte_ = 0x64;
337 on_b_ = ( (Audio_note*)audio_item_l_ )->on_b_;
338 if ( on_b_ ) // poor man-s staff dynamics:
339 dynamic_byte_ -= 0x10 * channel_i_;
341 dynamic_byte_ += 0x32; // 0x64 is supposed to be neutral, but let-s try
345 Midi_note::str() const
347 Note_req* n = audio_item_l_->req_l_->musical()->melodic()->note();
348 int pitch_i = n->pitch() + c0_pitch_i_c_;
349 if ( pitch_i != INT_MAX ) {
350 Byte status_byte = ( on_b_ ? 0x90 : 0x80 ) + channel_i_;
351 String str = String( (char)status_byte );
352 str += (char)pitch_i;
353 // poor man-s staff dynamics:
354 str += (char)dynamic_byte_;
360 Midi_tempo::Midi_tempo( Audio_item* audio_item_l )
361 : Midi_item( audio_item_l )
363 per_minute_4_i_ = ( (Audio_tempo*)audio_item_l_ )->per_minute_4_i_;
366 Midi_tempo::Midi_tempo( int per_minute_4_i )
369 per_minute_4_i_ = per_minute_4_i;
373 Midi_tempo::str() const
375 int useconds_per_4_i = 60 * (int)1e6 / per_minute_4_i_;
376 String str = "ff5103";
377 str += String_convert::i2hex_str( useconds_per_4_i, 6, '0' );
378 return String_convert::hex2bin_str( str );
381 Midi_meter::Midi_meter( Audio_item* audio_item_l )
382 : Midi_item( audio_item_l )
384 clocks_per_1_i_ = 18;
388 Midi_meter::str() const
390 Meter_change_req* m = audio_item_l_->req_l_->command()->meterchange();
391 int num_i = m->beats_i_;
392 int den_i = m->one_beat_i_;
394 String str = "ff5804";
395 str += String_convert::i2hex_str( num_i, 2, '0' );
396 str += String_convert::i2hex_str( intlog2( den_i ) , 2, '0' );
397 str += String_convert::i2hex_str( clocks_per_1_i_, 2, '0' );
398 str += String_convert::i2hex_str( 8, 2, '0' );
399 return String_convert::hex2bin_str( str );
402 Midi_text::Midi_text( Audio_item* audio_item_l )
403 : Midi_item( audio_item_l )
405 text_str_ = ( (Audio_text*)audio_item_l_ )->text_str_;
406 type_ = (Type)( (Audio_text*)audio_item_l_ )->type_;
409 Midi_text::Midi_text( Midi_text::Type type, String text_str )
412 text_str_ = text_str;
417 Midi_text::str() const
419 String str = "ff" + String_convert::i2hex_str( type_, 2, '0' );
420 str = String_convert::hex2bin_str( str );
421 str += i2varint_str( text_str_.length_i() );
426 Midi_track::Midi_track()
430 // 00 00 00 3B chunk length (59)
431 // 00 FF 58 04 04 02 18 08 time signature
432 // 00 FF 51 03 07 A1 20 tempo
434 // FF 59 02 sf mi Key Signature
445 char const* data_ch_C = ""
446 // "00" "ff58" "0404" "0218" "08"
447 // "00" "ff51" "0307" "a120"
448 // why a key at all, in midi?
450 // "00" "ff59" "02" "00" "00"
451 // key: F (scsii-menuetto)
452 // "00" "ff59" "02" "ff" "00"
456 // only for format 0 (currently using format 1)?
457 data_str += String_convert::hex2bin_str( data_ch_C );
459 char const* footer_ch_C = "00" "ff2f" "00";
460 String footer_str = String_convert::hex2bin_str( footer_ch_C );
462 set( "MTrk", data_str, footer_str );
466 Midi_track::add( int delta_time_i, String event_str )
468 if ( delta_time_i < 0 ) {
469 cout << String_convert::bin2hex_str( i2varint_str( delta_time_i ) ) << endl;
470 cout << String_convert::bin2hex_str( event_str ) << endl;
472 assert(delta_time_i >= 0);
473 Midi_chunk::add( i2varint_str( delta_time_i ) + event_str );
477 Midi_track::add( Moment delta_time_moment, Midi_item* mitem_l )
479 // use convention of 384 clocks per 4
480 // use Duration_convert
481 int delta_time_i = delta_time_moment * Moment( 384 ) / Moment( 1, 4 );
482 // ? int ( delta_time_moment * 4 * 384)
483 add( delta_time_i, mitem_l->str() );