compiler.y

   1 %{
   2 /*
   3
   4     Ann Hell Ex Machina - Music Software
   5     Copyright (C) 2003/2007 Angel Ortega <angel@triptico.com>
   6
   7     compiler.y - Scripting language YACC parser
   8
   9     This program is free software; you can redistribute it and/or
  10     modify it under the terms of the GNU General Public License
  11     as published by the Free Software Foundation; either version 2
  12     of the License, or (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17     GNU General Public License for more details.
  18
  19     You should have received a copy of the GNU General Public License
  20     along with this program; if not, write to the Free Software
  21     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23     http://www.triptico.com
  24
  25 */
  26
  27 #include "config.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <math.h>
  33
  34 #include "ahxm.h"
  35
  36 /*******************
  37         Data
  38 ********************/
  39
  40 int yylex(void);
  41 void yyerror(char * s);
  42
  43 /* injecting code functions (defined in compiler.l) */
  44 int push_code(char * code);
  45 int push_code_from_file(char * file);
  46
  47 /* current track */
  48 int track;
  49
  50 /* current time */
  51 double cur_time = 0.0;
  52
  53 /* end time (longest time seen) */
  54 double end_time = 0.0;
  55
  56 /* note globals */
  57 static double length;
  58 static int octave;
  59 static int transpose;
  60 static double staccato;
  61 static float volume_from;
  62 static float volume_to;
  63 static double gliss;
  64
  65 /* parser debugging */
  66
  67 #define DEBUGF if(verbose >= 2)printf
  68
  69 /* blocks */
  70
  71 struct block {
  72         char * name;
  73         int n_sblocks;
  74         char ** sblocks;
  75 };
  76
  77 static struct block * blocks = NULL;
  78 static int n_blocks = 0;
  79
  80 /* group info */
  81 struct group {
  82         double start;
  83         double gliss;
  84         double max;
  85 };
  86
  87 static struct group * groups = NULL;
  88 static int n_groups = 0;
  89 static int groups_size = 0;
  90
  91 /* mark info */
  92 struct mark {
  93         char * name;
  94         double time;
  95 };
  96
  97 static struct mark * marks = NULL;
  98 static int n_marks = 0;
  99
 100 /* arpeggiator */
 101 struct arp {
 102         double delay;
 103         int transpose;
 104         float volume;
 105         int track_off;
 106 };
 107
 108 static struct arp * arps = NULL;
 109 static int n_arps = 0;
 110 static int arps_size = 0;
 111
 112 static double arp_delay;
 113 static int arp_transpose;
 114 static float arp_volume;
 115 static int arp_track_off;
 116
 117 int compiler_error = 0;
 118
 119 extern int yyline;
 120
 121 /* alterations for each note */
 122 int alterations[12];
 123
 124 /* random seeds */
 125 unsigned long block_seed = 0;
 126 unsigned long volume_seed = 0;
 127
 128 /* solo track (-1, no solo) */
 129 int solo_track = -1;
 130
 131 /*******************
 132         Code
 133 ********************/
 134
 135 unsigned long ah_rnd(unsigned long * seed)
 136 /* special randomizer */
 137 {
 138         *seed = (*seed * 58321) + 11113;
 139
 140         return *seed >> 16;
 141 }
 142
 143
 144 void c_err(char * e1, char * e2, char * e3)
 145 /* reports an error from the compiler */
 146 {
 147         printf("ahxm:");
 148
 149         if (e1 != NULL)
 150                 printf(" %s", e1);
 151         if (e2 != NULL)
 152                 printf(" %s", e2);
 153         if (e3 != NULL)
 154                 printf(" %s", e3);
 155
 156         printf(" in line %d\n", yyline);
 157
 158         compiler_error++;
 159 }
 160
 161
 162 static void forward(double step)
 163 /* moves forward current time */
 164 {
 165         /* add step */
 166         cur_time += step;
 167
 168         /* quantizations could be done here */
 169 }
 170
 171
 172 static float volume(void)
 173 {
 174         float f;
 175
 176         if (volume_from == volume_to)
 177                 f = volume_from;
 178         else {
 179                 unsigned long r = ah_rnd(&volume_seed) % 1000;
 180
 181                 f = volume_from + (volume_to - volume_from) *
 182                         (((float)r) / 1000.0);
 183         }
 184
 185         return f;
 186 }
 187
 188
 189 /* blocks */
 190
 191 static int find_block(char * name)
 192 /* finds a block */
 193 {
 194         int n;
 195
 196         for (n = 0; n < n_blocks; n++) {
 197                 if (strcmp(name, blocks[n].name) == 0)
 198                         return n;
 199         }
 200
 201         return -1;
 202 }
 203
 204
 205 static int set_block(char * name, char * block)
 206 /* defines a block */
 207 {
 208         int n;
 209         struct block * b;
 210         char * start;
 211         char * stop;
 212
 213         /* if block already exists, free it */
 214         if ((n = find_block(name)) >= 0) {
 215                 b = &blocks[n];
 216
 217                 /* free all subblocks */
 218                 for (n = 0; n < b->n_sblocks; n++)
 219                         free(b->sblocks[n]);
 220
 221                 /* free the subblock array */
 222                 free(b->sblocks);
 223         }
 224         else {
 225                 GROW(blocks, n_blocks, struct block);
 226                 b = &blocks[n_blocks++];
 227
 228                 b->name = strdup(name);
 229         }
 230
 231         /* reset */
 232         b->n_sblocks = 0;
 233         b->sblocks = NULL;
 234
 235         /* now split in subblocks (delimited by : ) */
 236         start = block;
 237
 238         while ((stop = strchr(start, ':')) != NULL) {
 239                 /* break there */
 240                 *stop = '\0';
 241
 242                 /* add the subblock */
 243                 GROW(b->sblocks, b->n_sblocks, char *);
 244                 b->sblocks[b->n_sblocks++] = strdup(start);
 245
 246                 start = stop + 1;
 247         }
 248
 249         /* no more separators? store the rest */
 250         GROW(b->sblocks, b->n_sblocks, char *);
 251         b->sblocks[b->n_sblocks++] = strdup(start);
 252
 253         /* the original block is no longer needed */
 254         free(block);
 255
 256         return 1;
 257 }
 258
 259
 260 static void insert_block(char * name)
 261 /* inserts a block */
 262 {
 263         int n;
 264
 265         if ((n = find_block(name)) >= 0) {
 266                 struct block * b;
 267
 268                 b = &blocks[n];
 269
 270                 /* get one of them, randomly */
 271                 n = ah_rnd(&block_seed) % b->n_sblocks;
 272
 273                 push_code(strdup(b->sblocks[n]));
 274         }
 275         else
 276                 c_err("block-not-found", name, NULL);
 277 }
 278
 279
 280 static int insert_file(char * filename)
 281 {
 282         if (!push_code_from_file(filename)) {
 283                 c_err("script-not-found", filename, NULL);
 284                 return 1;
 285         }
 286
 287         return 0;
 288 }
 289
 290
 291 /* groups */
 292
 293 static int push_group(void)
 294 /* starts a new group of notes */
 295 {
 296         struct group * g;
 297
 298         if (n_groups == groups_size) {
 299                 GROW(groups, groups_size, struct group);
 300                 groups_size ++;
 301         }
 302
 303         g = &groups[n_groups++];
 304
 305         g->start = cur_time;
 306         g->gliss = 0.0;
 307         g->max = 0.0;
 308
 309         return 1;
 310 }
 311
 312
 313 static int next_group_part(void)
 314 /* part delimiter */
 315 {
 316         struct group * g;
 317
 318         if (n_groups == 0) {
 319                 c_err("missing-start-of-group", NULL, NULL);
 320                 return 0;
 321         }
 322
 323         g = &groups[n_groups - 1];
 324
 325         /* store maximum frame */
 326         if (g->max < cur_time)
 327                 g->max = cur_time;
 328
 329         /* add glissando delay */
 330         g->gliss += gliss;
 331
 332         /* rewind */
 333         cur_time = g->start + g->gliss;
 334
 335         return 1;
 336 }
 337
 338
 339 static int pop_group(void)
 340 /* finishes a group, moving the frame to the end of the longer part */
 341 {
 342         if (n_groups == 0) {
 343                 c_err("missing-start-of-group", NULL, NULL);
 344                 return 0;
 345         }
 346
 347         n_groups--;
 348
 349         /* if other parts of group were longer than the last one,
 350            move pointer there */
 351         if (groups[n_groups].max > cur_time)
 352                 cur_time = groups[n_groups].max;
 353
 354         return 1;
 355 }
 356
 357
 358 /* marks */
 359
 360 static int seek_mark(char * name)
 361 /* seeks a mark by name; returns its offset or -1 */
 362 {
 363         int n;
 364
 365         for (n = 0; n < n_marks; n++)
 366                 if (strcmp(marks[n].name, name) == 0)
 367                         return n;
 368
 369         return -1;
 370 }
 371
 372
 373 static void add_mark(char * name)
 374 /* creates a new mark */
 375 {
 376         int n;
 377
 378         if ((n = seek_mark(name)) == -1) {
 379                 n = n_marks++;
 380                 GROW(marks, n, struct mark);
 381                 marks[n].name = strdup(name);
 382         }
 383
 384         marks[n].time = cur_time;
 385 }
 386
 387
 388 static void find_mark(char * name, int set)
 389 /* finds a mark by name, optionally moving time cursor there */
 390 {
 391         int n;
 392
 393         if ((n = seek_mark(name)) != -1) {
 394                 if (set) {
 395                         if (cur_time > marks[n].time) {
 396                                 /* if mark is not END, fail */
 397                                 if (strcmp(name, "END") != 0)
 398                                         c_err("mark-overpassed", name, NULL);
 399                         }
 400                         else
 401                                 cur_time = marks[n].time;
 402                 }
 403                 else
 404                 if (cur_time != marks[n].time)
 405                         c_err("mark-mismatch", name, NULL);
 406
 407                 return;
 408         }
 409
 410         c_err("mark-not-found", name, NULL);
 411 }
 412
 413
 414 /* arpeggiator */
 415
 416 static void arp_default(void)
 417 /* resets arpeggiator values to the default ones */
 418 {
 419         arp_delay = 0.0;
 420         arp_transpose = 0;
 421         arp_volume = 1.0;
 422         arp_track_off = 0;
 423 }
 424
 425
 426 static void add_arp(void)
 427 /* adds an arpeggiator note */
 428 {
 429         struct arp * a;
 430
 431         /* if the note is exactly the same, do nothing */
 432         if (arp_delay == 0.0 && arp_transpose == 0 &&
 433            arp_volume == 1.0 && arp_track_off == 0)
 434                 return;
 435
 436         if (n_arps == arps_size) {
 437                 GROW(arps, arps_size, struct arp);
 438                 arps_size ++;
 439         }
 440
 441         a = &arps[n_arps];
 442
 443         a->delay = arp_delay;
 444         a->transpose = arp_transpose;
 445         a->volume = arp_volume;
 446         a->track_off = arp_track_off;
 447
 448         n_arps++;
 449         arp_default();
 450 }
 451
 452
 453 static void set_alteration(char * altstr)
 454 /* sets the alterations from altstr */
 455 {
 456         int n, steps[] = { 2, 0, 2, 0, 1, 2, 0, 2, 0, 2, 0, 1 };
 457
 458         /* reset alterations */
 459         for (n = 0; n < 12; n++)
 460                 alterations[n] = 0;
 461
 462         /* changed according the altstr spec */
 463         for (n = 0; *altstr != '\0' && n < 12; altstr++) {
 464                 switch (*altstr) {
 465                 case '&':
 466                         alterations[n] = -1;
 467                         break;
 468
 469                 case '#':
 470                         alterations[n] = 1;
 471                         break;
 472                 }
 473
 474                 /* move to next natural note */
 475                 n += steps[n];
 476         }
 477 }
 478
 479
 480 /* song events */
 481
 482 static struct song_ev * add_song_ev(song_ev_type type)
 483 {
 484         struct song_ev * r;
 485
 486         r = add_event(&song, &n_song_ev);
 487
 488         r->type = type;
 489         r->time = cur_time;
 490         r->trk_id = track;
 491         r->event_id = n_song_ev - 1;
 492
 493         return r;
 494 }
 495
 496
 497 static void add_note_event(int note)
 498 /* adds a note event */
 499 {
 500         int n;
 501         int np;
 502         struct song_ev *e;
 503
 504         /* sum the alteration */
 505         if ((n = note % 12) < 0)
 506                 n += 12;
 507
 508         note += alterations[n];
 509
 510         /* calculate the note */
 511         np = note + transpose + (octave * 12);
 512
 513         /* is note out of range? */
 514         if (np < 0 || np > 127) {
 515                 c_err("note-out-of-range", NULL, NULL);
 516                 return;
 517         }
 518
 519         e = add_song_ev(SONG_EV_NOTE);
 520
 521         e->value = np;
 522         e->len = length * staccato;
 523         e->vol = volume();
 524
 525         /* add arpeggiator repetitions */
 526         for (n = 0; n < n_arps; n++) {
 527
 528                 e = add_song_ev(SONG_EV_NOTE);
 529
 530                 e->time = cur_time + arps[n].delay;
 531                 e->trk_id = track + arps[n].track_off;
 532                 e->value = np + arps[n].transpose;
 533                 e->len = length * staccato;
 534                 e->vol = volume() * arps[n].volume;
 535         }
 536 }
 537
 538
 539 static void add_back_event(void)
 540 {
 541         struct song_ev *e = add_song_ev(SONG_EV_BACK);
 542
 543         e->len = length;
 544 }
 545
 546
 547 static void add_tempo_event(int trk_id, double tempo)
 548 {
 549         struct song_ev *e = add_song_ev(SONG_EV_TEMPO);
 550
 551         e->trk_id = trk_id;
 552         e->amount = tempo;
 553 }
 554
 555
 556 static void add_meter_event(int trk_id, int num, int den)
 557 {
 558         struct song_ev *e = add_song_ev(SONG_EV_METER);
 559
 560         e->trk_id = trk_id;
 561         e->min = num;
 562         e->max = den;
 563 }
 564
 565 static void add_measure_event(void)
 566 {
 567         struct song_ev *e = add_song_ev(SONG_EV_MEASURE);
 568
 569         e->trk_id = -1;
 570         e->value = yyline;
 571 }
 572
 573
 574 static void add_ss_sustain_event(double sustain)
 575 {
 576         struct song_ev *e = add_song_ev(SONG_EV_SS_SUSTAIN);
 577
 578         e->amount = sustain;
 579 }
 580
 581
 582 static void add_ss_attack_event(double attack)
 583 {
 584         struct song_ev *e = add_song_ev(SONG_EV_SS_ATTACK);
 585
 586         e->amount = attack;
 587 }
 588
 589
 590 static void add_ss_vibrato_event(double depth, double freq)
 591 {
 592         struct song_ev *e = add_song_ev(SONG_EV_SS_VIBRATO);
 593
 594         e->depth = depth;
 595         e->freq = freq;
 596 }
 597
 598
 599 static void add_ss_portamento_event(double portamento)
 600 {
 601         struct song_ev *e = add_song_ev(SONG_EV_SS_PORTAMENTO);
 602
 603         e->amount = portamento;
 604 }
 605
 606
 607 static void add_ss_channel_event(int channel, float vol)
 608 {
 609         struct song_ev *e = add_song_ev(SONG_EV_SS_CHANNEL);
 610
 611         e->channel = channel;
 612         e->vol = vol;
 613 }
 614
 615
 616 static void add_ss_wav_event(char * wav_file, int base, int min, int max,
 617         double loop_start, double loop_end, int first_channel, int skip_channels)
 618 {
 619         struct song_ev *e = add_song_ev(SONG_EV_SS_WAV);
 620
 621         e->name = wav_file;
 622         e->value = base;
 623         e->min = min;
 624         e->max = max;
 625         e->start = loop_start;
 626         e->end = loop_end;
 627         e->channel = first_channel;
 628         e->skip_channels = skip_channels;
 629 }
 630
 631
 632 static void add_ss_pat_event(char * pat_file)
 633 {
 634         struct song_ev *e = add_song_ev(SONG_EV_SS_PAT);
 635
 636         e->name = pat_file;
 637 }
 638
 639
 640 static void add_ss_eff_event(int type, int channel, double size, float gain,
 641         double depth, double freq, double phase, float initial, float final)
 642 {
 643         struct song_ev *e = add_song_ev(type);
 644
 645         e->channel = channel;
 646         e->len = size;
 647         e->vol = gain;
 648         e->depth = depth;
 649         e->freq = freq;
 650         e->phase = phase;
 651         e->initial = initial;
 652         e->final = final;
 653 }
 654
 655
 656 static void add_ss_pitch_stretch(int note, double len, float vol)
 657 {
 658         struct song_ev *e = add_song_ev(SONG_EV_SS_PITCH_STRETCH);
 659
 660         e->value = note;
 661         e->len = len;
 662         e->vol = vol;
 663 }
 664
 665
 666 static void add_ss_print_wave_tempo(int note, double len)
 667 {
 668         struct song_ev *e = add_song_ev(SONG_EV_SS_PRINT_WAVE_TEMPO);
 669
 670         e->value = note;
 671         e->len = len;
 672 }
 673
 674
 675 static void add_midi_channel_event(int channel)
 676 {
 677         struct song_ev *e = add_song_ev(SONG_EV_MIDI_CHANNEL);
 678
 679         e->channel = channel - 1;
 680 }
 681
 682
 683 static void add_midi_program_event(int program)
 684 {
 685         struct song_ev *e = add_song_ev(SONG_EV_MIDI_PROGRAM);
 686
 687         e->value = program;
 688 }
 689
 690
 691 static void add_song_info_event(char * author, char * name)
 692 {
 693         struct song_ev *e = add_song_ev(SONG_EV_SONG_INFO);
 694
 695         e->author = author;
 696         e->name = name;
 697 }
 698
 699
 700 static void init_track(void)
 701 /* sets the default values for a new track */
 702 {
 703         int n;
 704
 705         /* is there an end time? test if this is longer */
 706         if (cur_time > end_time) {
 707                 add_mark("END");
 708                 end_time = cur_time;
 709         }
 710
 711         cur_time = 0.0;
 712         length = 0.0;
 713         transpose = 0;
 714         staccato = 0.8;
 715         volume_from = volume_to = 0.75;
 716         octave = 5;
 717         gliss = 0;
 718
 719         /* groups should not cross track boundaries */
 720         n_groups = 0;
 721
 722         /* reset arpeggiator */
 723         n_arps = 0;
 724         arp_default();
 725
 726         /* is there a START mark? if so, move there */
 727         if ((n = seek_mark("START")) != -1)
 728                 cur_time = marks[n].time;
 729
 730         /* reset alterations */
 731         for (n = 0; n < 12; n++)
 732                 alterations[n] = 0;
 733 }
 734
 735
 736 %}
 737
 738 %union {
 739         int i;
 740         double d;
 741         char * p;
 742 };
 743
 744 %token <i> P_INTEGER S_INTEGER
 745 %token <d> P_REAL S_REAL
 746 %token <i> NOTE_P NOTE_T3 NOTE_T5
 747 %token <p> NEW_MARK GOTO_MARK ASSERT_MARK
 748
 749 %token <p> BLOCK BLK_ASSIGN BLK_INSERT FILE_INSERT
 750
 751 %token <p> ALTSTR
 752
 753 %token <p> XC_STR
 754 %token <i> XC_ABSNOTE
 755 %token <d> XC_MSECS
 756
 757 %token SS_SEP SS_WAV SS_LOOP_WAV SS_PAT
 758 %token SS_SUSTAIN SS_ATTACK SS_VIBRATO SS_PORTAMENTO SS_CHANNEL SS_VOL
 759
 760 %token SS_EFF_DELAY SS_EFF_ECHO SS_EFF_COMB SS_EFF_ALLPASS SS_EFF_FLANGER
 761 %token SS_EFF_WOBBLE SS_EFF_SQWOBBLE SS_EFF_HFWOBBLE
 762 %token SS_EFF_FADER SS_EFF_REVERB
 763 %token SS_EFF_FOLDBACK SS_EFF_ATAN SS_EFF_DISTORT SS_EFF_OVERDRIVE
 764 %token SS_EFF_OFF
 765
 766 %token SS_PITCH_STRETCH SS_TIME_STRETCH SS_PRINT_WAVE_TEMPO
 767
 768 %token SONG_INFO
 769
 770 %token MIDI_CHANNEL MIDI_PROGRAM MIDI_GENERIC
 771
 772 %type <i> integer note note_pitch rest back
 773 %type <d> real p_number number note_length
 774
 775 %type <d> arp_list arp_note
 776 %type <i> xc_absnote
 777
 778 %%
 779
 780 script:
 781         script stmt             { ; }
 782         | /* NULL */
 783         ;
 784
 785 stmt:
 786         note                    {
 787                                         /* note event */
 788                                         add_note_event($1);
 789                                         forward(length);
 790                                 }
 791         | rest                  {
 792                                         /* rest */
 793                                         forward(length);
 794                                 }
 795         | back                  {
 796                                         /* back */
 797                                         add_back_event();
 798                                 }
 799         | 'z' note_length       {
 800                                         /* zero note */
 801                                         length = $2;
 802                                 }
 803         | 'o' P_INTEGER         {
 804                                         /* absolute octave */
 805                                         octave = $2;
 806                                 }
 807         | 'o' S_INTEGER         {
 808                                         /* relative octave */
 809                                         octave += $2;
 810                                 }
 811         | 'v' P_INTEGER         {
 812                                         /* absolute volume */
 813                                         volume_from = volume_to = (float)$2;
 814                                 }
 815         | 'v' P_REAL            {
 816                                         /* absolute volume */
 817                                         volume_from = volume_to = (float)$2;
 818                                 }
 819         | 'v' S_REAL            {
 820                                         /* relative volume */
 821                                         volume_from += (float)$2;
 822                                         volume_to += (float)$2;
 823                                 }
 824         | 'v' P_REAL ',' P_REAL {
 825                                         /* absolute volume ranges */
 826                                         volume_from = (float)$2;
 827                                         volume_to = (float)$4;
 828                                 }
 829         | 't' integer           {
 830                                         /* transpose */
 831                                         transpose = $2;
 832                                 }
 833         | 's' p_number          {
 834                                         /* staccato */
 835                                         staccato = $2;
 836                                 }
 837
 838         | '<'                   {
 839                                         /* start of group */
 840                                         push_group();
 841                                 }
 842         | ';'                   {
 843                                         /* group delimiter */
 844                                         next_group_part();
 845                                 }
 846         | '>'                   {
 847                                         /* end of group */
 848                                         pop_group();
 849                                 }
 850         | 'l' note_length       {
 851                                         /* glissando */
 852                                         gliss = $2;
 853                                 }
 854
 855         | '|'                   {
 856                                         /* measure mark event */
 857                                         add_measure_event();
 858                                 }
 859
 860         | NEW_MARK              {
 861                                         /* add new mark */
 862                                         add_mark($1);
 863                                 }
 864         | GOTO_MARK             {
 865                                         /* go to mark */
 866                                         find_mark($1, 1);
 867                                 }
 868         | ASSERT_MARK           {
 869                                         /* assert mark */
 870                                         find_mark($1, 0);
 871                                 }
 872
 873         | '\\'                  {
 874                                         /* new track */
 875
 876                                         track++;
 877                                         init_track();
 878                                 }
 879         | 'T' p_number          {
 880                                         /* tempo setting */
 881                                         add_tempo_event(-1, $2);
 882                                 }
 883         | 'M' P_INTEGER '/' P_INTEGER {
 884                                         /* meter (time signature) setting */
 885                                         add_meter_event(-1, $2, $4);
 886                                 }
 887         | ALTSTR                {
 888                                         /* alteration string */
 889                                         set_alteration($1);
 890                                 }
 891
 892         | BLOCK '*' P_INTEGER   {
 893                                         /* repeat block */
 894                                         int n;
 895
 896                                         /* store the block as <TMP> */
 897                                         set_block("<TMP>", $1);
 898
 899                                         for(n = 0;n < $3;n++)
 900                                                 insert_block("<TMP>");
 901                                 }
 902         | BLOCK BLK_ASSIGN      {
 903                                         /* assign block */
 904                                         set_block($2, $1);
 905                                 }
 906         | BLK_INSERT            {
 907                                         /* insert block */
 908                                         insert_block($1);
 909                                 }
 910         | FILE_INSERT           {
 911                                         /* insert file */
 912                                         insert_file($1);
 913                                 }
 914
 915         | arp                   { ; }
 916
 917         | xc_cmd                { ; }
 918
 919         ;
 920
 921 integer:
 922         P_INTEGER               { $$ = $1; }
 923         | S_INTEGER             { $$ = $1; }
 924         ;
 925
 926 real:
 927         P_REAL                  { $$ = $1; }
 928         | S_REAL                { $$ = $1; }
 929         ;
 930
 931 p_number:
 932         P_INTEGER               { $$ = (double) $1; }
 933         | P_REAL                { $$ = $1; }
 934         ;
 935
 936 number:
 937         integer                 { $$ = (double) $1; }
 938         | real                  { $$ = $1; }
 939         ;
 940
 941 note:
 942         note_pitch              { $$ = $1; }
 943         | note note_length      { $$ = $1; length=$2; }
 944         | note '~' number       { $$ = $1; DEBUGF("imm volume: %lf\n", $3); }
 945         ;
 946
 947 note_pitch:
 948         NOTE_P                  { $$ = $1; }
 949         | note_pitch '&'        { $$ = $1 - 1; }
 950         | note_pitch '#'        { $$ = $1 + 1; }
 951         | note_pitch '\''       { $$ = $1 + 12; }
 952         | note_pitch ','        { $$ = $1 - 12; }
 953         ;
 954
 955 note_length:
 956         P_INTEGER               { $$ = 1 / (double) $1; }
 957         | note_length NOTE_T3   { $$ = $1 * 2.0 / 3.0; }
 958         | note_length NOTE_T5   { $$ = $1 * 4.0 / 5.0; }
 959         | note_length '*' p_number { $$ = $1 * $3; }
 960         | note_length '.'       { $$ = $1 * 1.5; }
 961         ;
 962
 963 rest:
 964         'r'                     { ; }
 965         | rest note_length      {
 966                                         /* rest with length */
 967                                         length = $2;
 968                                 }
 969         ;
 970
 971 back:
 972         'k'                     { ; }
 973         | back note_length      {
 974                                         /* back with length */
 975                                         length = $2;
 976                                 }
 977         ;
 978
 979 arp:
 980         'x'                     {
 981                                         /* empty arpeggiator */
 982                                         n_arps = 0;
 983                                         arp_default();
 984                                 }
 985         | 'x' arp_list          { ; }
 986         ;
 987
 988 arp_list:
 989         arp_note                {
 990                                         /* first arpeggiator note */
 991                                         n_arps = 0;
 992                                         add_arp();
 993                                 }
 994         | arp_list ',' arp_note {
 995                                         /* rest of arpeggiator notes */
 996                                         add_arp();
 997                                 }
 998         ;
 999
1000 arp_note:
1001         note_length             {
1002                                         /* arpeggiator delay */
1003                                         arp_delay = $1;
1004                                 }
1005         | arp_note '~' number   {
1006                                         /* arpeggiator volume */
1007                                         arp_volume = (float)$3;
1008                                 }
1009         | arp_note S_INTEGER    {
1010                                         /* arpeggiator transpose */
1011                                         arp_transpose = $2;
1012                                 }
1013         | arp_note '/' P_INTEGER {
1014                                         /* arpeggiator track offset */
1015                                         arp_track_off = $3;
1016                                 }
1017         | arp_note NOTE_T3      {
1018                                         /* HACK: /3 */
1019                                         arp_track_off = 3;
1020                                 }
1021         | arp_note NOTE_T5      {
1022                                         /* HACK: /5 */
1023                                         arp_track_off = 5;
1024                                 }
1025         ;
1026
1027 xc_absnote:
1028         P_INTEGER               { $$ = $1; }
1029         | XC_ABSNOTE            { $$ = $1; }
1030         ;
1031
1032 xc_cmd:
1033         SS_WAV XC_STR xc_absnote {
1034                                         /* load .wav file with just one note */
1035                                         add_ss_wav_event($2, $3, $3, $3, -1.0, -1.0, 0, 0);
1036                                 }
1037         | SS_WAV XC_STR xc_absnote xc_absnote xc_absnote {
1038                                         /* load .wav file */
1039                                         add_ss_wav_event($2, $3, $4, $5, -1.0, -1.0, 0, 0);
1040                                 }
1041         | SS_WAV XC_STR xc_absnote xc_absnote xc_absnote number number {
1042                                         /* load .wav file, with loop boundaries */
1043                                         add_ss_wav_event($2, $3, $4, $5, $6, $7, 0, 0);
1044                                 }
1045         | SS_WAV XC_STR xc_absnote xc_absnote xc_absnote number number number number {
1046                                         /* load .wav file, with loop boundaries,
1047                                            first channel and skip channels */
1048                                         add_ss_wav_event($2, $3, $4, $5, $6, $7, $8, $9);
1049                                 }
1050         | SS_PAT XC_STR         {
1051                                         /* load .pat file */
1052                                         add_ss_pat_event($2);
1053                                 }
1054         | SS_SUSTAIN XC_MSECS   {
1055                                         /* sets sustain */
1056                                         add_ss_sustain_event($2);
1057                                 }
1058         | SS_ATTACK XC_MSECS    {
1059                                         /* sets attack */
1060                                         add_ss_attack_event($2);
1061                                 }
1062         | SS_VIBRATO XC_MSECS number {
1063                                         /* sets vibrato */
1064                                         add_ss_vibrato_event($2, $3);
1065                                 }
1066         | SS_PORTAMENTO number {
1067                                         /* sets portamento */
1068                                         add_ss_portamento_event($2);
1069                                 }
1070         | SS_CHANNEL integer number {
1071                                         /* sets volume for a channel */
1072                                         add_ss_channel_event($2, $3);
1073                                 }
1074         | SS_VOL number number {
1075                                         /* set vol for 2 channels */
1076                                         add_ss_channel_event(0, $2);
1077                                         add_ss_channel_event(1, $3);
1078                                 }
1079         | SS_VOL number number number {
1080                                         /* set vol for 3 channels */
1081                                         add_ss_channel_event(0, $2);
1082                                         add_ss_channel_event(1, $3);
1083                                         add_ss_channel_event(2, $4);
1084                                 }
1085         | SS_VOL number number number number {
1086                                         /* set vol for 4 channels */
1087                                         add_ss_channel_event(0, $2);
1088                                         add_ss_channel_event(1, $3);
1089                                         add_ss_channel_event(2, $4);
1090                                         add_ss_channel_event(3, $5);
1091                                 }
1092         | SS_VOL number number number number number number {
1093                                         /* set vol for 6 channels */
1094                                         add_ss_channel_event(0, $2);
1095                                         add_ss_channel_event(1, $3);
1096                                         add_ss_channel_event(2, $4);
1097                                         add_ss_channel_event(3, $5);
1098                                         add_ss_channel_event(4, $6);
1099                                         add_ss_channel_event(5, $7);
1100                                 }
1101         | SS_EFF_DELAY integer XC_MSECS {
1102                                         /* delay effect */
1103                                         add_ss_eff_event(SONG_EV_SS_EFF_DELAY,
1104                                         $2, $3, 0, 0, 0, 0, 0, 0);
1105                                 }
1106
1107         | SS_EFF_ECHO integer XC_MSECS number {
1108                                         /* echo effect */
1109                                         add_ss_eff_event(SONG_EV_SS_EFF_ECHO,
1110                                         $2, $3, $4, 0, 0, 0, 0, 0);
1111                                 }
1112
1113         | SS_EFF_COMB integer XC_MSECS number {
1114                                         /* comb effect */
1115                                         add_ss_eff_event(SONG_EV_SS_EFF_COMB,
1116                                         $2, $3, $4, 0, 0, 0, 0, 0);
1117                                 }
1118
1119         | SS_EFF_ALLPASS integer XC_MSECS number {
1120                                         /* allpass effect */
1121                                         add_ss_eff_event(SONG_EV_SS_EFF_ALLPASS,
1122                                         $2, $3, $4, 0, 0, 0, 0, 0);
1123                                 }
1124
1125         | SS_EFF_FLANGER integer XC_MSECS number XC_MSECS number number {
1126                                         /* flanger effect */
1127                                         add_ss_eff_event(SONG_EV_SS_EFF_FLANGER,
1128                                         $2, $3, $4, $5, $6, $7, 0, 0);
1129                                 }
1130
1131         | SS_EFF_WOBBLE integer number number {
1132                                         /* wobble effect */
1133                                         add_ss_eff_event(SONG_EV_SS_EFF_WOBBLE,
1134                                         $2, 0, 0.8, 0, $3, $4, 0, 0);
1135                                 }
1136
1137         | SS_EFF_WOBBLE integer number number number {
1138                                         /* wobble effect, with gain */
1139                                         add_ss_eff_event(SONG_EV_SS_EFF_WOBBLE,
1140                                         $2, 0, $5, 0, $3, $4, 0, 0);
1141                                 }
1142
1143         | SS_EFF_SQWOBBLE integer number number {
1144                                         /* square wobble effect */
1145                                         add_ss_eff_event(SONG_EV_SS_EFF_SQWOBBLE,
1146                                         $2, 0, 0, 0, $3, $4, 0, 0);
1147                                 }
1148
1149         | SS_EFF_HFWOBBLE integer number number {
1150                                         /* half wobble effect */
1151                                         add_ss_eff_event(SONG_EV_SS_EFF_HFWOBBLE,
1152                                         $2, 0, 0, 0, $3, $4, 0, 0);
1153                                 }
1154
1155         | SS_EFF_FADER integer XC_MSECS number number {
1156                                         /* fader effect */
1157                                         add_ss_eff_event(SONG_EV_SS_EFF_FADER,
1158                                         $2, $3, 0, 0, 0, 0, $4, $5);
1159                                 }
1160
1161         | SS_EFF_REVERB integer {
1162                                         /* reverb effect */
1163                                         add_ss_eff_event(SONG_EV_SS_EFF_REVERB,
1164                                         $2, 0, 0, 0, 0, 0, 0, 0);
1165                                 }
1166
1167         | SS_EFF_FOLDBACK integer number {
1168                                         /* foldback distortion effect */
1169                                         add_ss_eff_event(SONG_EV_SS_EFF_FOLDBACK,
1170                                         $2, 0, $3, 0, 0, 0, 0, 0);
1171                                 }
1172         | SS_EFF_ATAN integer number {
1173                                         /* atan distortion effect */
1174                                         add_ss_eff_event(SONG_EV_SS_EFF_ATAN,
1175                                         $2, 0, $3, 0, 0, 0, 0, 0);
1176                                 }
1177         | SS_EFF_DISTORT integer number {
1178                                         /* distort distortion effect */
1179                                         add_ss_eff_event(SONG_EV_SS_EFF_DISTORT,
1180                                         $2, 0, $3, 0, 0, 0, 0, 0);
1181                                 }
1182         | SS_EFF_OVERDRIVE integer number {
1183                                         /* overdrive distortion effect */
1184                                         add_ss_eff_event(SONG_EV_SS_EFF_OVERDRIVE,
1185                                         $2, 0, $3, 0, 0, 0, 0, 0);
1186                                 }
1187
1188         | SS_EFF_OFF integer {
1189                                         /* off effect */
1190                                         add_ss_eff_event(SONG_EV_SS_EFF_OFF,
1191                                         $2, 0, 0, 0, 0, 0, 0, 0);
1192                                 }
1193
1194         | SS_PITCH_STRETCH xc_absnote number number {
1195                                         /* pitch stretch note */
1196                                         add_ss_pitch_stretch($2, $3, $4);
1197
1198                                         forward($3);
1199                                 }
1200
1201         | SS_PRINT_WAVE_TEMPO xc_absnote number {
1202                                         /* print tempo from wave */
1203                                         add_ss_print_wave_tempo($2, $3);
1204                                 }
1205
1206         | SONG_INFO XC_STR XC_STR {
1207                                         /* add song info */
1208                                         add_song_info_event($2, $3);
1209                                 }
1210
1211         | MIDI_CHANNEL integer {
1212                                         /* midi channel */
1213                                         add_midi_channel_event($2);
1214                                 }
1215
1216         | MIDI_PROGRAM integer {
1217                                         /* midi program */
1218                                         add_midi_program_event($2);
1219                                 }
1220         ;
1221
1222 %%
1223
1224 void yyerror(char * s)
1225 {
1226         c_err(s, NULL, NULL);
1227 }
1228
1229
1230 #define set_block_d(n,b) set_block(n,strdup(b))
1231
1232 static void compile_startup(void)
1233 {
1234         track = 0;
1235         yyline = 1;
1236         compiler_error = 0;
1237
1238         /* default settings */
1239         add_tempo_event(-2, 120.0);
1240         add_meter_event(-2, 4, 4);
1241         init_track();
1242
1243         /* standard tonalities */
1244         set_block_d("CM",  "A");        set_block_d("Am",  "$CM");
1245         set_block_d("C#M", "A#######"); set_block_d("A#m", "$C#M");
1246         set_block_d("DM",  "A#--#---"); set_block_d("Bm",  "$DM");
1247         set_block_d("E&M", "A--&--&&"); set_block_d("Cm",  "$E&M");
1248         set_block_d("EM",  "A##-##--"); set_block_d("C#m", "$EM");
1249         set_block_d("FM",  "A------&"); set_block_d("Dm",  "$FM");
1250         set_block_d("F#M", "A######-"); set_block_d("D#m", "$F#M");
1251         set_block_d("GM",  "A---#---"); set_block_d("Em",  "$GM");
1252         set_block_d("A&M", "A-&&--&&"); set_block_d("Fm",  "$A&M");
1253         set_block_d("AM",  "A#--##--"); set_block_d("F#m", "$AM");
1254         set_block_d("B&M", "A--&---&"); set_block_d("Gm",  "$B&M");
1255         set_block_d("BM",  "A##-###-"); set_block_d("G#m", "$BM");
1256 }
1257
1258
1259 static int do_parse(void)
1260 {
1261         int r = yyparse() + compiler_error;
1262
1263         if (solo_track != -1)
1264                 mute_tracks(-solo_track);
1265
1266         return r;
1267 }
1268
1269
1270 int compile_ahs_string(char * code)
1271 {
1272         compile_startup();
1273
1274         push_code(strdup(code));
1275
1276         return do_parse();
1277 }
1278
1279
1280 int compile_ahs(char * file)
1281 {
1282         compile_startup();
1283
1284         if (insert_file(file))
1285                 return 1;
1286
1287         return do_parse();
1288 }