ahxm.h

   1 /*
   2
   3     Ann Hell Ex Machina - Music Software
   4     Copyright (C) 2003/2006 Angel Ortega <angel@triptico.com>
   5
   6     This program is free software; you can redistribute it and/or
   7     modify it under the terms of the GNU General Public License
   8     as published by the Free Software Foundation; either version 2
   9     of the License, or (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20     http://www.triptico.com
  21
  22 */
  23
  24 /* HARD LIMITS */
  25
  26 #ifndef SS_MAX_CHANNELS
  27 #define SS_MAX_CHANNELS 16
  28 #endif
  29
  30 #ifndef SS_MAX_GENERATORS
  31 #define SS_MAX_GENERATORS 256
  32 #endif
  33
  34 #ifndef SS_MAX_INSTRUMENTS
  35 #define SS_MAX_INSTRUMENTS 256
  36 #endif
  37
  38 /* STRUCTURES AND TYPES */
  39
  40 /* samples */
  41
  42 typedef double sample_t;
  43
  44 /* waves */
  45
  46 struct ss_wave
  47 {
  48         double size;            /* size in frames of full wave */
  49         int p_size;             /* size in frames of the page */
  50         int n_channels;         /* # of channels */
  51         sample_t ** wave;       /* the PCM waves */
  52         int s_rate;             /* original sample rate */
  53
  54         double loop_start;      /* start of loop (-1, no loop) */
  55         double loop_end;        /* end of loop */
  56
  57         double base_freq;       /* base frequency */
  58         double min_freq;        /* minimum frequency */
  59         double max_freq;        /* maximum frequency */
  60
  61         int first_channel;      /* first channel to spread into */
  62         int skip_channels;      /* channels to skip when spreading */
  63
  64         char * filename;        /* filename (for paged files) */
  65         long f_pos;             /* file position where the PCM files */
  66         int p_offset;           /* offset in frames of the page */
  67         int bits;               /* bits of the PCM wave (8, 16) */
  68         int sign;               /* sign of the PCM wave (1, -1) */
  69
  70         int page_faults;        /* number of times ss_load_page() was called */
  71 };
  72
  73 /* generators */
  74
  75 struct ss_gen
  76 {
  77         int note_id;            /* note ID */
  78         sample_t vol;           /* volume */
  79         struct ss_wave * w;     /* the wave data */
  80
  81         double cursor;          /* offset to next sample */
  82         double inc;             /* increment (frequency) */
  83
  84         int sustain;            /* number of frames to play after release */
  85         sample_t dvol;          /* volume decrement in sustain */
  86
  87         double vibrato;         /* vibrato oscillator */
  88         double vib_depth;       /* vibrato depth */
  89         double vib_inc;         /* increment for vibrato oscillator */
  90
  91         double portamento;      /* portamento sum to inc */
  92
  93         struct ss_gen * next;
  94         struct ss_gen * prev;
  95 };
  96
  97 /* software syntesizer instruments */
  98
  99 struct ss_ins
 100 {
 101         int n_layers;                   /* # of layers */
 102         struct ss_wave ** layers;       /* layers */
 103
 104         struct ss_gen * gens;           /* generator queue */
 105
 106         int n_channels;                 /* number of channels */
 107         sample_t * vols;                /* volumes (1 per channel) */
 108         struct ss_eff ** effs;          /* effect chains (1 per channel) */
 109
 110         double sustain;                 /* sustain in msecs */
 111         double vib_depth;               /* vibrato depth */
 112         double vib_freq;                /* vibrato frequency */
 113
 114         double portamento;              /* portamento */
 115 };
 116
 117 /* digital effects */
 118
 119 struct ss_eff
 120 {
 121         struct ss_wave * wave;  /* wave buffer */
 122         sample_t gain;          /* effect gain */
 123         sample_t igain;         /* gain increment */
 124
 125         double lfo;             /* lfo value */
 126         double lfo_depth;       /* lfo depth */
 127         double lfo_inc;         /* lfo increment */
 128
 129         double cursor;          /* current buffer position */
 130
 131         sample_t (* func)(struct ss_eff *, sample_t);   /* processing function */
 132
 133         struct ss_eff * next;   /* next in chain */
 134 };
 135
 136 /* song events */
 137
 138 typedef enum
 139 {
 140         SONG_EV_TEMPO,
 141         SONG_EV_METER,
 142         SONG_EV_MEASURE,
 143
 144         SONG_EV_SS_SUSTAIN,
 145         SONG_EV_SS_VIBRATO,
 146         SONG_EV_SS_PORTAMENTO,
 147         SONG_EV_SS_CHANNEL,
 148
 149         SONG_EV_SS_WAV,
 150         SONG_EV_SS_PAT,
 151
 152         SONG_EV_SS_EFF_OFF,
 153         SONG_EV_SS_EFF_DELAY,
 154         SONG_EV_SS_EFF_ECHO,
 155         SONG_EV_SS_EFF_COMB,
 156         SONG_EV_SS_EFF_ALLPASS,
 157         SONG_EV_SS_EFF_FLANGER,
 158         SONG_EV_SS_EFF_WOBBLE,
 159         SONG_EV_SS_EFF_SQWOBBLE,
 160         SONG_EV_SS_EFF_HFWOBBLE,
 161         SONG_EV_SS_EFF_FADER,
 162         SONG_EV_SS_EFF_REVERB,
 163         SONG_EV_SS_EFF_FOLDBACK,
 164
 165         SONG_EV_MIDI_CHANNEL,
 166         SONG_EV_MIDI_PROGRAM,
 167
 168         SONG_EV_BACK,
 169         SONG_EV_NOTE,
 170         SONG_EV_SS_PITCH_STRETCH,
 171         SONG_EV_SS_PRINT_WAVE_TEMPO,
 172
 173         SONG_EV_SONG_INFO,
 174
 175         SONG_EV_NOTE_OFF,
 176         SONG_EV_NOTE_ON,
 177
 178         SONG_EV_END
 179
 180 } song_ev_type;
 181
 182 struct song_ev_generic
 183 {
 184         song_ev_type type;      /* event type */
 185         double time;            /* event time (1: whole note) */
 186         int trk_id;             /* track id */
 187         int event_id;           /* event id */
 188 };
 189
 190 struct song_ev_note
 191 {
 192         song_ev_type type;      /* SONG_EV_NOTE */
 193         double time;
 194         int trk_id;
 195         int event_id;
 196         int note;               /* MIDI-like note */
 197         double len;             /* note length (1: whole note) */
 198         sample_t vol;           /* note volume (1: full volume) */
 199 };
 200
 201 struct song_ev_back
 202 {
 203         song_ev_type type;      /* SONG_EV_BACK */
 204         double time;
 205         int trk_id;
 206         int event_id;
 207         double len;             /* note length (1: whole note) */
 208 };
 209
 210 struct song_ev_tempo
 211 {
 212         song_ev_type type;      /* SONG_EV_TEMPO */
 213         double time;
 214         int trk_id;             /* always < 0 */
 215         int event_id;
 216         double tempo;           /* tempo in bpm */
 217 };
 218
 219 struct song_ev_meter
 220 {
 221         song_ev_type type;      /* SONG_EV_METER */
 222         double time;
 223         int trk_id;             /* always < 0 */
 224         int event_id;
 225         int num;                /* meter numerator */
 226         int den;                /* meter denominator */
 227 };
 228
 229 struct song_ev_measure
 230 {
 231         song_ev_type type;      /* SONG_EV_MEASURE */
 232         double time;
 233         int trk_id;
 234         int event_id;
 235         int line;               /* line number */
 236 };
 237
 238 struct song_ev_ss_pitch_stretch
 239 {
 240         song_ev_type type;      /* SONG_EV_SS_PITCH_STRETCH */
 241         double time;
 242         int trk_id;
 243         int event_id;
 244         int note;               /* MIDI-like note (to find the wave) */
 245         double len;             /* note length (1: whole note) */
 246         sample_t vol;           /* note volume (1: full volume) */
 247 };
 248
 249 struct song_ev_ss_print_wave_tempo
 250 {
 251         song_ev_type type;      /* SONG_EV_SS_PRINT_WAVE_TEMPO */
 252         double time;
 253         int trk_id;
 254         int event_id;
 255         int note;               /* MIDI-like note (to find the wave) */
 256         double len;             /* note length (1: whole note) */
 257 };
 258
 259 struct song_ev_ss_sustain
 260 {
 261         song_ev_type type;      /* SONG_EV_SS_SUSTAIN */
 262         double time;
 263         int trk_id;
 264         int event_id;
 265         double sustain;         /* sustain time (in msecs) */
 266 };
 267
 268 struct song_ev_ss_vibrato
 269 {
 270         song_ev_type type;      /* SONG_EV_SS_VIBRATO */
 271         double time;
 272         int trk_id;
 273         int event_id;
 274         double vib_depth;       /* vibrato depth (in msecs) */
 275         double vib_freq;        /* vibrato frequency (in Hzs) */
 276 };
 277
 278 struct song_ev_ss_portamento
 279 {
 280         song_ev_type type;      /* SONG_EV_SS_PORTAMENTO */
 281         double time;
 282         int trk_id;
 283         int event_id;
 284         double portamento;      /* portamento */
 285 };
 286
 287 struct song_ev_ss_channel
 288 {
 289         song_ev_type type;      /* SONG_EV_SS_CHANNEL */
 290         double time;
 291         int trk_id;
 292         int event_id;
 293         int channel;            /* channel */
 294         sample_t vol;           /* volume */
 295 };
 296
 297 struct song_ev_ss_wav
 298 {
 299         song_ev_type type;      /* SONG_EV_SS_WAV */
 300         double time;
 301         int trk_id;
 302         int event_id;
 303         char * file;            /* path to .wav file */
 304         int base;               /* MIDI-like base note */
 305         int min;                /* MIDI-like minimum note */
 306         int max;                /* MIDI-like maximum note */
 307         double loop_start;      /* start of loop */
 308         double loop_end;        /* end of loop */
 309         int first_channel;      /* first channel to start spreading */
 310         int skip_channels;      /* channels to skip when spreading */
 311 };
 312
 313 struct song_ev_ss_pat
 314 {
 315         song_ev_type type;      /* SONG_EV_SS_PAT */
 316         double time;
 317         int trk_id;
 318         int event_id;
 319         char * file;            /* path to .pat file */
 320 };
 321
 322 struct song_ev_ss_eff
 323 {
 324         song_ev_type type;      /* effect type */
 325         double time;
 326         int trk_id;
 327         int event_id;
 328         int channel;            /* channel */
 329         double size;            /* size of effect */
 330         sample_t gain;          /* gain */
 331         double depth;           /* depth */
 332         double freq;            /* freq */
 333         double phase;           /* phase */
 334         sample_t initial;       /* initial vol */
 335         sample_t final;         /* final vol */
 336 };
 337
 338 struct song_ev_midi_channel
 339 {
 340         song_ev_type type;      /* SONG_EV_MIDI_CHANNEL */
 341         double time;
 342         int trk_id;
 343         int event_id;
 344         int channel;            /* midi channel (1-16) */
 345 };
 346
 347 struct song_ev_midi_program
 348 {
 349         song_ev_type type;      /* SONG_EV_MIDI_PROGRAM */
 350         double time;
 351         int trk_id;
 352         int event_id;
 353         int program;            /* midi program (0-127) */
 354 };
 355
 356 struct song_ev_song_info
 357 {
 358         song_ev_type type;      /* SONG_EV_SONG_INFO */
 359         double time;
 360         int trk_id;
 361         int event_id;
 362         char * author;          /* track author */
 363         char * name;            /* track name */
 364 };
 365
 366 union song_ev
 367 {
 368         struct song_ev_generic generic;
 369
 370         struct song_ev_tempo tempo;
 371         struct song_ev_meter meter;
 372         struct song_ev_measure measure;
 373
 374         struct song_ev_note note;
 375         struct song_ev_back back;
 376
 377         struct song_ev_ss_pitch_stretch ss_pitch_stretch;
 378         struct song_ev_ss_print_wave_tempo ss_print_wave_tempo;
 379
 380         struct song_ev_ss_sustain ss_sustain;
 381         struct song_ev_ss_vibrato ss_vibrato;
 382         struct song_ev_ss_portamento ss_portamento;
 383         struct song_ev_ss_channel ss_channel;
 384
 385         struct song_ev_ss_wav ss_wav;
 386         struct song_ev_ss_pat ss_pat;
 387
 388         struct song_ev_ss_eff ss_eff;
 389
 390         struct song_ev_midi_channel midi_channel;
 391         struct song_ev_midi_program midi_program;
 392
 393         struct song_ev_song_info song_info;
 394 };
 395
 396
 397 /* GLOBALS */
 398
 399 /* in ss_core.c */
 400
 401 extern int ss_frequency;
 402 extern int ss_interpolation;
 403 extern int ss_nchannels;
 404
 405 /* in ss_input.c */
 406
 407 extern int ss_page_size;
 408
 409 /* in ss_output.c */
 410
 411 extern sample_t ss_master_volume;
 412 extern int ss_output_clipped;
 413 extern sample_t ss_optimal_volume;
 414 extern char * ss_cue_file_name;
 415
 416 /* in song.c */
 417
 418 extern union song_ev * song;
 419 extern int n_song_ev;
 420 extern int solo_track;
 421
 422 /* in support.c */
 423
 424 extern int verbose;
 425 extern int trace;
 426
 427 /* MACROS */
 428
 429 /* milliseconds to frames conversion */
 430 #define MS2F(ms) ((ms / 1000.0) * ss_frequency)
 431
 432 /* grows a dynamic array */
 433 #define GROW(b,n,t) b = (t *)realloc(b,((n) + 1) * sizeof(t))
 434
 435 /* PROTOTYPES */
 436
 437 /* in ss_core.c */
 438
 439 double ss_note_frequency(int note);
 440 struct ss_wave * ss_alloc_wave(int size, int n_channels, int s_rate, int p_size);
 441 void ss_free_wave(struct ss_wave * w);
 442 void ss_prepare_wave(struct ss_wave * w);
 443 sample_t ss_get_sample(struct ss_wave * w, int channel, double offset);
 444 double ss_tempo_from_wave(struct ss_wave * w, int note, double len);
 445 double ss_pitch_from_tempo(struct ss_wave * w, double tempo, double len);
 446
 447 /* in ss_gen.c */
 448
 449 void ss_gen_init(void);
 450 struct ss_gen * ss_gen_alloc(struct ss_gen ** q);
 451 void ss_gen_free(struct ss_gen ** q, struct ss_gen * g);
 452 void ss_gen_sustain(struct ss_gen * g, double sustain);
 453 void ss_gen_vibrato(struct ss_gen * g, double depth, double freq);
 454 void ss_gen_portamento(struct ss_gen * g, double portamento);
 455 void ss_gen_play(struct ss_gen * g, double freq, sample_t vol, int note_id,
 456         struct ss_wave * w);
 457 void ss_gen_release(struct ss_gen * g);
 458 int ss_gen_frame(struct ss_gen * g, int n_channels, sample_t frame[]);
 459
 460 /* in ss_ins.c */
 461
 462 void ss_ins_init(struct ss_ins * i);
 463 void ss_ins_add_layer(struct ss_ins * i, struct ss_wave * w);
 464 struct ss_wave * ss_ins_find_layer(struct ss_ins * i, double freq, int * off);
 465 void ss_ins_set_channel(struct ss_ins * i, int channel, sample_t vol);
 466 void ss_ins_set_sustain(struct ss_ins * i, double sustain);
 467 void ss_ins_set_vibrato(struct ss_ins * i, double depth, double freq);
 468 void ss_ins_set_portamento(struct ss_ins * i, double portamento);
 469 int ss_ins_play(struct ss_ins * i, double freq, sample_t vol, int note_id,
 470         struct ss_wave * w);
 471 int ss_ins_note_on(struct ss_ins * i, int note, sample_t vol, int note_id);
 472 void ss_ins_note_off(struct ss_ins * i, int note_id);
 473 void ss_ins_frame(struct ss_ins * i, sample_t frame[]);
 474
 475 /* in ss_output.c */
 476
 477 int ss_output_open(char * drvname, char * filename);
 478 void ss_output_init_frame(sample_t frame[]);
 479 int ss_output_write(sample_t frame[]);
 480 void ss_output_close(void);
 481 int cue_file_song_info(int frame, char * author, char * name);
 482
 483 /* in ss_input.c */
 484
 485 void load_pcm_wave(FILE * f, struct ss_wave * w);
 486 struct ss_wave * ss_load_wav_file(char * file,
 487         double base_freq, double min_freq, double max_freq,
 488         double loop_start, double loop_end,
 489         int first_channel, int skip_channels);
 490 int ss_load_pat_file(struct ss_ins * i, char * file);
 491
 492 /* in ss_eff.c */
 493
 494 void ss_eff_delay(struct ss_eff ** ec, double size);
 495 void ss_eff_echo(struct ss_eff ** ec, double size, sample_t gain);
 496 void ss_eff_comb(struct ss_eff ** ec, double size, sample_t gain);
 497 void ss_eff_allpass(struct ss_eff ** ec, double size, sample_t gain);
 498 void ss_eff_flanger(struct ss_eff ** ec, double size, sample_t gain,
 499         double depth, double freq, double phase);
 500 void ss_eff_wobble(struct ss_eff ** ec, double freq, double phase, sample_t gain);
 501 void ss_eff_square_wobble(struct ss_eff ** ec, double freq, double phase);
 502 void ss_eff_half_wobble(struct ss_eff ** ec, double freq, double phase);
 503 void ss_eff_fader(struct ss_eff ** ec, double size, sample_t initial, sample_t final);
 504 void ss_eff_reverb(struct ss_eff ** ec);
 505 void ss_eff_foldback(struct ss_eff ** ec, sample_t threshold);
 506
 507 sample_t ss_eff_process(struct ss_eff * e, sample_t s);
 508 void ss_eff_off(struct ss_eff ** ec);
 509
 510 /* in song.c */
 511
 512 void song_clear(void);
 513 void add_song_ev(song_ev_type type, double time, union song_ev * ev);
 514 void song_sort(void);
 515 int song_test_measure_boundary(double ev_time, int num, int den, int line);
 516
 517 /* in ss_song.c */
 518
 519 int ss_song_render(int skip_secs, char * driver, char * devfile);
 520
 521 /* in midi_song.c */
 522
 523 int midi_song_play(int skip_secs);
 524 int midi_device_open(char * devfile);
 525 void midi_device_close(void);
 526
 527 /* in compiler.y */
 528
 529 int compile_ahs_string(char * code);
 530 int compile_ahs(char * file);
 531
 532 /* in support.c */
 533
 534 void libpath_add(char * path, int strip);
 535 FILE * libpath_fopen(char * filename, char * mode);
 536 char * libpath_locate(char * filename);
 537 void transconv_add(char * from, char * to, char * convcmd);
 538 char * transconv(char * file, char * ext, char * dir);