midi2ly/midi-track-parser.cc

   1 /*
   2   midi-track-parser.cc -- implement
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include <assert.h>
  10 #include "string-convert.hh"
  11 #include "midi2ly-global.hh"
  12 #include "midi-track-parser.hh"
  13 #include "mudela-column.hh"
  14 #include "mudela-item.hh"
  15 #include "mudela-score.hh"
  16 #include "mudela-staff.hh"
  17
  18 Midi_track_parser::Midi_track_parser (Midi_parser_info* info_l, int i)
  19 {
  20   info_l_ = info_l;
  21   at_mom_ = 0;
  22   track_info_p_ = 0;
  23   mudela_staff_p_ = new Mudela_staff (i, "", "", "");
  24   parse_header ();
  25   parse_delta_time ();
  26 }
  27
  28 Midi_track_parser::~Midi_track_parser ()
  29 {
  30   delete mudela_staff_p_;
  31   delete track_info_p_;
  32 }
  33
  34 Rational
  35 Midi_track_parser::at_mom ()
  36 {
  37   return at_mom_;
  38 }
  39
  40 bool
  41 Midi_track_parser::eot ()
  42 {
  43   if ( info_l_->byte_L_ < info_l_->end_byte_L_ )
  44     return false;
  45   return true;
  46 }
  47
  48 void
  49 Midi_track_parser::note_end (Mudela_column* col_l, int channel_i, int pitch_i, int aftertouch_i )
  50 {
  51   // junk dynamics
  52   (void)aftertouch_i;
  53
  54   assert (col_l);
  55
  56   for (Cons<Mudela_note>** pp = &open_note_l_list_.head_; *pp;)
  57     {
  58       Cons<Mudela_note>* i = *pp;
  59       if ((i->car_->pitch_i_ == pitch_i) && (i->car_->channel_i_ == channel_i))
  60         {
  61           i->car_->end_column_l_ = col_l;
  62           delete open_note_l_list_.remove_cons (pp);
  63           return;
  64         }
  65       else
  66         pp = &i->next_;
  67     }
  68   warning (_f ("Junking note-end event: channel = %d, pitch = %d",
  69                channel_i, pitch_i));
  70 }
  71
  72 void
  73 Midi_track_parser::note_end_all (Mudela_column* col_l)
  74 {
  75   // find
  76   assert (col_l);
  77   for (Cons<Mudela_note>* i = open_note_l_list_.head_; i; i = i->next_)
  78     {
  79       i->car_->end_column_l_ = col_l;
  80     }
  81   // UGH UGH. MEMORY LEAK.
  82   open_note_l_list_.init ();
  83 }
  84
  85 Mudela_staff*
  86 Midi_track_parser::parse (Mudela_column* col_l)
  87 {
  88   Rational mom = at_mom ();
  89   while (!eot () && (mom == at_mom ()))
  90     {
  91       Mudela_item* p = parse_event (col_l);
  92       if (p)
  93         mudela_staff_p_->add_item (p);
  94     }
  95
  96   if (!eot())
  97     return 0;
  98
  99   // catch-all
 100   note_end_all (col_l);
 101
 102   Mudela_staff* p = mudela_staff_p_;
 103   mudela_staff_p_ = 0;
 104   return p;
 105 }
 106
 107 void
 108 Midi_track_parser::parse_delta_time ()
 109 {
 110   if (eot ())
 111     return;
 112   int delta_i = get_var_i ();
 113   at_mom_ += Rational (delta_i, info_l_->division_1_i_);
 114 }
 115
 116 Mudela_item*
 117 Midi_track_parser::parse_event (Mudela_column* col_l)
 118 {
 119   Byte byte = peek_byte ();
 120   // RUNNING_STATUS     [\x00-\x5f]
 121   if (byte <= 0x5f)
 122     {
 123       if (running_byte_ <= 0x5f)
 124         exit (_ ("invalid running status"));
 125       /*
 126         'running status' rather means 'missing status'.
 127         we'll just pretend we read the running status byte.
 128       */
 129       byte = running_byte_;
 130     }
 131   else
 132     byte = next_byte ();
 133
 134   Mudela_item* item_p = 0;
 135   // DATA_ENTRY [\x60-\x79]
 136   if ((byte >= 0x60) && (byte <= 0x79))
 137     {
 138       next_byte ();
 139     }
 140   // ALL_NOTES_OFF      [\x7a-\x7f]
 141   else if ((byte >= 0x7a) && (byte <= 0x7f))
 142     {
 143       next_byte ();
 144       next_byte ();
 145       note_end_all (col_l);
 146     }
 147   // NOTE_OFF   [\x80-\x8f]
 148   else if ((byte >= 0x80) && (byte <= 0x8f))
 149     {
 150       running_byte_ = byte;
 151       int channel_i = byte & ~0x90;
 152       int pitch_i = (int)next_byte ();
 153       int dyn_i = (int)next_byte ();
 154       note_end (col_l, channel_i, pitch_i, dyn_i);
 155     }
 156   // NOTE_ON            [\x90-\x9f]
 157   else if ((byte >= 0x90) && (byte <= 0x9f))
 158     {
 159       running_byte_ = byte;
 160       int channel_i = byte & ~0x90;
 161       int pitch_i = (int)next_byte ();
 162       int dyn_i = (int)next_byte ();
 163       /*
 164         sss: some broken devices encode NOTE_OFF as
 165         NOTE_ON with zero volume
 166       */
 167       if (dyn_i)
 168         {
 169           Mudela_note* p = new Mudela_note (col_l, channel_i, pitch_i, dyn_i);
 170           item_p = p;
 171           open_note_l_list_.append (new Cons<Mudela_note> (p, 0));
 172         }
 173       else
 174         {
 175           note_end (col_l, channel_i, pitch_i, dyn_i);
 176         }
 177     }
 178
 179   // POLYPHONIC_AFTERTOUCH      [\xa0-\xaf]
 180   else if ((byte >= 0xa0) && (byte <= 0xaf))
 181     {
 182       running_byte_ = byte;
 183       next_byte ();
 184       next_byte ();
 185     }
 186   // CONTROLMODE_CHANGE [\xb0-\xbf]
 187   else if ((byte >= 0xb0) && (byte <= 0xbf))
 188     {
 189       running_byte_ = byte;
 190       next_byte ();
 191       next_byte ();
 192     }
 193   // PROGRAM_CHANGE     [\xc0-\xcf]
 194   else if ((byte >= 0xc0) && (byte <= 0xcf))
 195     {
 196       running_byte_ = byte;
 197       next_byte ();
 198     }
 199   // CHANNEL_AFTERTOUCH [\xd0-\xdf]
 200   else if ((byte >= 0xd0) && (byte <= 0xdf))
 201     {
 202       running_byte_ = byte;
 203       next_byte ();
 204       next_byte ();
 205     }
 206   // PITCHWHEEL_RANGE   [\xe0-\xef]
 207   else if ((byte >= 0xe0) && (byte <= 0xef))
 208     {
 209       running_byte_ = byte;
 210       next_byte ();
 211       next_byte ();
 212     }
 213   // SYSEX_EVENT1       [\xf0]
 214   else if (byte == 0xf0)
 215     {
 216       int length_i = get_var_i ();
 217       String str = get_str (length_i);
 218     }
 219   // SYSEX_EVENT2       [\xf7]
 220   else if (byte == 0xf7)
 221     {
 222       int length_i = get_var_i ();
 223       String str = get_str (length_i);
 224     }
 225   // META_EVENT [\xff]
 226   else if (byte == 0xff)
 227     {
 228       // SEQUENCE       [\x00][\x02]
 229       byte = next_byte ();
 230       if (byte == 0)
 231         {
 232           next_byte ();
 233           get_i (2);
 234         }
 235       // YYTEXT         [\x01]
 236       // YYCOPYRIGHT    [\x02]
 237       // YYTRACK_NAME   [\x03]
 238       // YYINSTRUMENT_NAME      [\x04]
 239       // YYLYRIC                [\x05]
 240       // YYMARKER               [\x06]
 241       // YYCUE_POINT    [\x07]
 242       else if ((byte >= 0x01) && (byte <= 0x07))
 243         {
 244           // LOGOUT (DEBUG_ver) << "\n% Text(" << (int)byte << "):" << flush;
 245           int length_i = get_var_i ();
 246           String str = get_str (length_i);
 247           // LOGOUT (DEBUG_ver) << str << endl;
 248           Mudela_text::Type t = (Mudela_text::Type)byte;
 249           Mudela_text* p = new Mudela_text (t, str);
 250           item_p = p;
 251           if (t == Mudela_text::COPYRIGHT)
 252             mudela_staff_p_->copyright_str_ = p->text_str_;
 253           else if (t == Mudela_text::TRACK_NAME)
 254             mudela_staff_p_->name_str_ = p->text_str_;
 255           else if (t == Mudela_text::INSTRUMENT_NAME)
 256             mudela_staff_p_->instrument_str_ = p->text_str_;
 257         }
 258       // END_OF_TRACK   [\x2f][\x00]
 259       else
 260         {
 261           Byte next = peek_byte ();
 262           if ((byte == 0x2f) && (next == 0x00))
 263             {
 264               next_byte ();
 265               info_l_->byte_L_ = info_l_->end_byte_L_;
 266             }
 267           // TEMPO              [\x51][\x03]
 268           else if ((byte == 0x51) && (next == 0x03))
 269             {
 270               next_byte ();
 271               unsigned useconds_per_4_u = get_u (3);
 272               // $$ = new Mudela_tempo ( ($2 << 16) + ($3 << 8) + $4);
 273               // LOGOUT (DEBUG_ver) << $$->str() << endl;
 274               Mudela_tempo* p = new Mudela_tempo ( useconds_per_4_u );
 275               item_p = p;
 276               info_l_->score_l_->mudela_tempo_l_ = p;
 277               mudela_staff_p_->mudela_tempo_l_ = p;
 278             }
 279           // SMPTE_OFFSET       [\x54][\x05]
 280           else if ((byte == 0x54) && (next == 0x05))
 281             {
 282               next_byte ();
 283               (int)next_byte ();
 284               (int)next_byte ();
 285               (int)next_byte ();
 286               (int)next_byte ();
 287               (int)next_byte ();
 288             }
 289           // TIME               [\x58][\x04]
 290           else if ((byte == 0x58) && (next == 0x04))
 291             {
 292               next_byte ();
 293               int num_i = (int)next_byte ();
 294               int den_i = (int)next_byte ();
 295               int clocks_4_i = (int)next_byte ();
 296               int count_32_i = (int)next_byte ();
 297               Mudela_time_signature* p = new Mudela_time_signature ( num_i, den_i, clocks_4_i, count_32_i );
 298               item_p = p;
 299               info_l_->score_l_->mudela_time_signature_l_ = p;
 300               info_l_->bar_mom_ = p->bar_mom ();
 301               mudela_staff_p_->mudela_time_signature_l_ = p;
 302             }
 303           // KEY                [\x59][\x02]
 304           else if ((byte == 0x59) && (next == 0x02))
 305             {
 306               next_byte ();
 307               int accidentals_i = (int)(signed char)next_byte ();
 308               int minor_i = (int)(bool)next_byte ();
 309               Mudela_key* p = new Mudela_key (accidentals_i, minor_i);
 310               item_p = p;
 311 #if 0
 312               info_l_->score_l_->mudela_key_l_ = p;
 313               mudela_staff_p_->mudela_key_l_ = p;
 314 #endif
 315             }
 316           // SSME               [\0x7f][\x03]
 317           else if ((byte == 0x7f) && (next == 0x03))
 318             {
 319               next_byte ();
 320               int length_i = get_var_i ();
 321               String str = get_str (length_i);
 322               item_p = new Mudela_text ((Mudela_text::Type)byte, str);
 323             }
 324           else
 325             {
 326               next_byte ();
 327               next_byte ();
 328               warning (_ ("unimplemented MIDI meta-event"));
 329             }
 330         }
 331     }
 332   else
 333     exit (_ ("invalid MIDI event"));
 334
 335   if (item_p)
 336     item_p->mudela_column_l_ = col_l;
 337
 338   parse_delta_time ();
 339
 340   return item_p;
 341 }
 342
 343 void
 344 Midi_track_parser::parse_header ()
 345 {
 346   String str = get_str (4);
 347   if ( str != "MTrk" )
 348     exit (_ ("MIDI track expected"));
 349
 350   int length_i = get_i (4);
 351   // is this signed?
 352   if (length_i < 0)
 353     exit (_ ("invalid track length"));
 354   assert (!track_info_p_);
 355   track_info_p_ = new Midi_parser_info (*info_l_);
 356   track_info_p_->end_byte_L_ = track_info_p_->byte_L_ + length_i;
 357   forward_byte_L (length_i);
 358   //  forward_byte_L (length_i-1);
 359   info_l_ = track_info_p_;
 360 }