/*
- midi-item.cc -- implement Midi items.
+ midi-item.cc -- implement MIDI items.
source file of the GNU LilyPond music typesetter
- (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2008 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include "midi-item.hh"
else if (Audio_time_signature *i = dynamic_cast<Audio_time_signature *> (a))
return new Midi_time_signature (i);
else if (Audio_text *i = dynamic_cast<Audio_text *> (a))
- //return i->text_string_.length () ? new Midi_text (i) : 0;
return new Midi_text (i);
else
assert (0);
- // isn't C++ grand?
return 0;
}
-void
-Midi_chunk::set (string header_string, string data_string, string footer_string)
-{
- data_string_ = data_string;
- footer_string_ = footer_string;
- header_string_ = header_string;
-}
-
-string
-Midi_chunk::data_string () const
-{
- return data_string_;
-}
-string
-Midi_chunk::to_string () const
-{
- string str = header_string_;
- string dat = data_string ();
- string length_string = String_convert::int2hex (dat.length ()
- + footer_string_.length (), 8, '0');
- length_string = String_convert::hex2bin (length_string);
-
- str += length_string;
- str += dat;
- str += footer_string_;
-
- return str;
-}
Midi_duration::Midi_duration (Real seconds_f)
{
return string ("<duration: ") + ::to_string (seconds_) + ">";
}
-Midi_event::Midi_event (Moment delta_mom, Midi_item *midi)
-{
- delta_mom_ = delta_mom;
- midi_ = midi;
-}
-
-/*
- ugh. midi output badly broken since grace note hackage.
-*/
-string
-Midi_event::to_string () const
-{
- Rational rat_dt = (delta_mom_.main_part_ * Rational (384)
- + delta_mom_.grace_part_ * Rational (100)) * Rational (4);
- int delta = rat_dt.to_int ();
-
- string delta_string = Midi_item::i2varint_string (delta);
- string midi_string = midi_->to_string ();
- assert (midi_string.length ());
- return delta_string + midi_string;
-}
-
-Midi_header::Midi_header (int format, int tracks, int clocks_per_4)
-{
- string str;
-
- string format_string = String_convert::int2hex (format, 4, '0');
- str += String_convert::hex2bin (format_string);
-
- string tracks_string = String_convert::int2hex (tracks, 4, '0');
- str += String_convert::hex2bin (tracks_string);
-
- string tempo_string = String_convert::int2hex (clocks_per_4, 4, '0');
- str += String_convert::hex2bin (tempo_string);
-
- set ("MThd", str, "");
-}
-
Midi_instrument::Midi_instrument (Audio_instrument *a)
{
audio_ = a;
Byte program_byte = 0;
bool found = false;
- /*
- UGH. don't use eval.
- */
SCM proc = ly_lily_module_constant ("midi-program");
SCM program = scm_call_1 (proc, ly_symbol2scm (audio_->str_.c_str ()));
found = (program != SCM_BOOL_F);
{
}
-Midi_channel_item::~Midi_channel_item ()
-{
- channel_ = 0;
-}
-
Midi_channel_item::Midi_channel_item ()
{
channel_ = 0;
}
string
-Midi_item::i2varint_string (int i)
+int2midi_varint_string (int i)
{
int buffer = i & 0x7f;
while ((i >>= 7) > 0)
dynamic_byte_ = 0x7f;
}
-Moment
-Midi_note::get_length () const
-{
- Moment m = audio_->length_mom_;
- return m;
-}
int
Midi_note::get_fine_tuning () const
// print warning if fine tuning was needed, HJJ
if (get_fine_tuning () != 0)
{
- warning (_f ("experimental: temporarily fine tuning (of %d cents) a channel.",
- get_fine_tuning ()));
-
finetune = PITCH_WHEEL_CENTER;
// Move pitch wheel to a shifted position.
// The pitch wheel range (of 4 semitones) is multiplied by the cents.
str += ::to_string ((char) (0x00));
}
- str += ::to_string ((char)status_byte);
+ str += ::to_string ((char) status_byte);
str += ::to_string ((char) (get_semitone_pitch () + c0_pitch_));
- str += ::to_string ((char)dynamic_byte_);
+ str += ::to_string ((char) dynamic_byte_);
return str;
}
{
string str = "ff" + String_convert::int2hex (audio_->type_, 2, '0');
str = String_convert::hex2bin (str);
- str += i2varint_string (audio_->text_string_.length ());
+ str += int2midi_varint_string (audio_->text_string_.length ());
str += audio_->text_string_;
return str;
}
-Midi_track::Midi_track ()
- : Midi_chunk ()
-{
- // 4D 54 72 6B MTrk
- // 00 00 00 3B chunk length (59)
- // 00 FF 58 04 04 02 18 08 time signature
- // 00 FF 51 03 07 A1 20 tempo
-
- // FF 59 02 sf mi Key Signature
- // sf = -7: 7 flats
- // sf = -1: 1 flat
- // sf = 0: key of C
- // sf = 1: 1 sharp
- // sf = 7: 7 sharps
- // mi = 0: major key
- // mi = 1: minor key
-
- number_ = 0;
-
- char const *data_str0 = ""
- // "00" "ff58" "0404" "0218" "08"
- // "00" "ff51" "0307" "a120"
- // why a key at all, in midi?
- // key: C
- // "00" "ff59" "02" "00" "00"
- // key: F (scsii-menuetto)
- // "00" "ff59" "02" "ff" "00"
- ;
-
- string data_string;
- // only for format 0 (currently using format 1)?
- data_string += String_convert::hex2bin (data_str0);
-
- char const *footer_str0 = "00" "ff2f" "00";
- string footer_string = String_convert::hex2bin (footer_str0);
-
- set ("MTrk", data_string, footer_string);
-}
-
-void
-Midi_track::add (Moment delta_time_mom, Midi_item *midi)
-{
- assert (delta_time_mom >= Moment (0));
-
- Midi_event *e = new Midi_event (delta_time_mom, midi);
- events_.push_back (e);
-}
-
-string
-Midi_track::data_string () const
-{
- string str = Midi_chunk::data_string ();
- if (do_midi_debugging_global)
- str += "\n";
-
- for (vector<Midi_event*>::const_iterator i (events_.begin());
- i != events_.end(); i ++)
- {
- str += (*i)->to_string ();
- if (do_midi_debugging_global)
- str += "\n";
- }
- return str;
-}
-
-
char const *
Midi_item::name () const
{
return this->class_name ();
}
-
-Midi_track::~Midi_track ()
-{
- junk_pointers (events_);
-}
projects / lilypond.git / blobdiff