1 /* 2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si> 3 * 4 * Midi synth routines for OPL2/OPL3/OPL4 FM 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (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 */ 21 22 #undef DEBUG_ALLOC 23 #undef DEBUG_MIDI 24 25 #include "opl3_voice.h" 26 #include <sound/asoundef.h> 27 28 extern char snd_opl3_regmap[MAX_OPL2_VOICES][4]; 29 30 extern int use_internal_drums; 31 32 /* 33 * The next table looks magical, but it certainly is not. Its values have 34 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception 35 * for i=0. This log-table converts a linear volume-scaling (0..127) to a 36 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume 37 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative 38 * volume -8 it was implemented as a table because it is only 128 bytes and 39 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) 40 */ 41 42 static char opl3_volume_table[128] = 43 { 44 -63, -48, -40, -35, -32, -29, -27, -26, 45 -24, -23, -21, -20, -19, -18, -18, -17, 46 -16, -15, -15, -14, -13, -13, -12, -12, 47 -11, -11, -10, -10, -10, -9, -9, -8, 48 -8, -8, -7, -7, -7, -6, -6, -6, 49 -5, -5, -5, -5, -4, -4, -4, -4, 50 -3, -3, -3, -3, -2, -2, -2, -2, 51 -2, -1, -1, -1, -1, 0, 0, 0, 52 0, 0, 0, 1, 1, 1, 1, 1, 53 1, 2, 2, 2, 2, 2, 2, 2, 54 3, 3, 3, 3, 3, 3, 3, 4, 55 4, 4, 4, 4, 4, 4, 4, 5, 56 5, 5, 5, 5, 5, 5, 5, 5, 57 6, 6, 6, 6, 6, 6, 6, 6, 58 6, 7, 7, 7, 7, 7, 7, 7, 59 7, 7, 7, 8, 8, 8, 8, 8 60 }; 61 62 void snd_opl3_calc_volume(unsigned char *volbyte, int vel, 63 snd_midi_channel_t *chan) 64 { 65 int oldvol, newvol, n; 66 int volume; 67 68 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); 69 if (volume > 127) 70 volume = 127; 71 72 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); 73 74 newvol = opl3_volume_table[volume] + oldvol; 75 if (newvol > OPL3_TOTAL_LEVEL_MASK) 76 newvol = OPL3_TOTAL_LEVEL_MASK; 77 else if (newvol < 0) 78 newvol = 0; 79 80 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); 81 82 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); 83 } 84 85 /* 86 * Converts the note frequency to block and fnum values for the FM chip 87 */ 88 static short opl3_note_table[16] = 89 { 90 305, 323, /* for pitch bending, -2 semitones */ 91 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 92 686, 726 /* for pitch bending, +2 semitones */ 93 }; 94 95 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, 96 int note, snd_midi_channel_t *chan) 97 { 98 int block = ((note / 12) & 0x07) - 1; 99 int idx = (note % 12) + 2; 100 int freq; 101 102 if (chan->midi_pitchbend) { 103 int pitchbend = chan->midi_pitchbend; 104 int segment; 105 106 if (pitchbend > 0x1FFF) 107 pitchbend = 0x1FFF; 108 109 segment = pitchbend / 0x1000; 110 freq = opl3_note_table[idx+segment]; 111 freq += ((opl3_note_table[idx+segment+1] - freq) * 112 (pitchbend % 0x1000)) / 0x1000; 113 } else { 114 freq = opl3_note_table[idx]; 115 } 116 117 *fnum = (unsigned char) freq; 118 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | 119 ((block << 2) & OPL3_BLOCKNUM_MASK); 120 } 121 122 123 #ifdef DEBUG_ALLOC 124 static void debug_alloc(opl3_t *opl3, char *s, int voice) { 125 int i; 126 char *str = "x.24"; 127 128 printk("time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); 129 for (i = 0; i < opl3->max_voices; i++) 130 printk("%c", *(str + opl3->voices[i].state + 1)); 131 printk("\n"); 132 } 133 #endif 134 135 /* 136 * Get a FM voice (channel) to play a note on. 137 */ 138 static int opl3_get_voice(opl3_t *opl3, int instr_4op, 139 snd_midi_channel_t *chan) { 140 int chan_4op_1; /* first voice for 4op instrument */ 141 int chan_4op_2; /* second voice for 4op instrument */ 142 143 snd_opl3_voice_t *vp, *vp2; 144 unsigned int voice_time; 145 int i; 146 147 #ifdef DEBUG_ALLOC 148 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; 149 #endif 150 151 /* This is our "allocation cost" table */ 152 enum { 153 FREE = 0, CHEAP, EXPENSIVE, END 154 }; 155 156 /* Keeps track of what we are finding */ 157 struct best { 158 unsigned int time; 159 int voice; 160 } best[END]; 161 struct best *bp; 162 163 for (i = 0; i < END; i++) { 164 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */; 165 best[i].voice = -1; 166 } 167 168 /* Look through all the channels for the most suitable. */ 169 for (i = 0; i < opl3->max_voices; i++) { 170 vp = &opl3->voices[i]; 171 172 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) 173 /* skip unavailable channels, allocated by 174 drum voices or by bounded 4op voices) */ 175 continue; 176 177 voice_time = vp->time; 178 bp = best; 179 180 chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); 181 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); 182 if (instr_4op) { 183 /* allocate 4op voice */ 184 /* skip channels unavailable to 4op instrument */ 185 if (!chan_4op_1) 186 continue; 187 188 if (vp->state) 189 /* kill one voice, CHEAP */ 190 bp++; 191 /* get state of bounded 2op channel 192 to be allocated for 4op instrument */ 193 vp2 = &opl3->voices[i + 3]; 194 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { 195 /* kill two voices, EXPENSIVE */ 196 bp++; 197 voice_time = (voice_time > vp->time) ? 198 voice_time : vp->time; 199 } 200 } else { 201 /* allocate 2op voice */ 202 if ((chan_4op_1) || (chan_4op_2)) 203 /* use bounded channels for 2op, CHEAP */ 204 bp++; 205 else if (vp->state) 206 /* kill one voice on 2op channel, CHEAP */ 207 bp++; 208 /* raise kill cost to EXPENSIVE for all channels */ 209 if (vp->state) 210 bp++; 211 } 212 if (voice_time < bp->time) { 213 bp->time = voice_time; 214 bp->voice = i; 215 } 216 } 217 218 for (i = 0; i < END; i++) { 219 if (best[i].voice >= 0) { 220 #ifdef DEBUG_ALLOC 221 printk("%s %iop allocation on voice %i\n", 222 alloc_type[i], instr_4op ? 4 : 2, 223 best[i].voice); 224 #endif 225 return best[i].voice; 226 } 227 } 228 /* not found */ 229 return -1; 230 } 231 232 /* ------------------------------ */ 233 234 /* 235 * System timer interrupt function 236 */ 237 void snd_opl3_timer_func(unsigned long data) 238 { 239 240 opl3_t *opl3 = (opl3_t *)data; 241 int again = 0; 242 int i; 243 244 spin_lock(&opl3->sys_timer_lock); 245 for (i = 0; i < opl3->max_voices; i++) { 246 snd_opl3_voice_t *vp = &opl3->voices[i]; 247 if (vp->state > 0 && vp->note_off_check) { 248 if (vp->note_off == jiffies) 249 snd_opl3_note_off(opl3, vp->note, 0, vp->chan); 250 else 251 again++; 252 } 253 } 254 if (again) { 255 opl3->tlist.expires = jiffies + 1; /* invoke again */ 256 add_timer(&opl3->tlist); 257 } else { 258 opl3->sys_timer_status = 0; 259 } 260 spin_unlock(&opl3->sys_timer_lock); 261 } 262 263 /* 264 * Start system timer 265 */ 266 static void snd_opl3_start_timer(opl3_t *opl3) 267 { 268 unsigned long flags; 269 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 270 if (! opl3->sys_timer_status) { 271 opl3->tlist.expires = jiffies + 1; 272 add_timer(&opl3->tlist); 273 opl3->sys_timer_status = 1; 274 } 275 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 276 } 277 278 /* ------------------------------ */ 279 280 281 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { 282 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 283 }; 284 285 /* 286 * Start a note. 287 */ 288 void snd_opl3_note_on(void *p, int note, int vel, snd_midi_channel_t *chan) 289 { 290 opl3_t *opl3; 291 snd_seq_instr_t wanted; 292 snd_seq_kinstr_t *kinstr; 293 int instr_4op; 294 295 int voice; 296 snd_opl3_voice_t *vp, *vp2; 297 unsigned short connect_mask; 298 unsigned char connection; 299 unsigned char vol_op[4]; 300 301 int extra_prg = 0; 302 303 unsigned short reg_side; 304 unsigned char op_offset; 305 unsigned char voice_offset; 306 unsigned short opl3_reg; 307 unsigned char reg_val; 308 309 int key = note; 310 unsigned char fnum, blocknum; 311 int i; 312 313 fm_instrument_t *fm; 314 unsigned long flags; 315 316 opl3 = p; 317 318 #ifdef DEBUG_MIDI 319 snd_printk("Note on, ch %i, inst %i, note %i, vel %i\n", 320 chan->number, chan->midi_program, note, vel); 321 #endif 322 wanted.cluster = 0; 323 wanted.std = SNDRV_SEQ_INSTR_TYPE2_OPL2_3; 324 325 /* in SYNTH mode, application takes care of voices */ 326 /* in SEQ mode, drum voice numbers are notes on drum channel */ 327 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 328 if (chan->drum_channel) { 329 /* percussion instruments are located in bank 128 */ 330 wanted.bank = 128; 331 wanted.prg = note; 332 } else { 333 wanted.bank = chan->gm_bank_select; 334 wanted.prg = chan->midi_program; 335 } 336 } else { 337 /* Prepare for OSS mode */ 338 if (chan->number >= MAX_OPL3_VOICES) 339 return; 340 341 /* OSS instruments are located in bank 127 */ 342 wanted.bank = 127; 343 wanted.prg = chan->midi_program; 344 } 345 346 spin_lock_irqsave(&opl3->voice_lock, flags); 347 348 if (use_internal_drums) { 349 snd_opl3_drum_switch(opl3, note, vel, 1, chan); 350 spin_unlock_irqrestore(&opl3->voice_lock, flags); 351 return; 352 } 353 354 __extra_prg: 355 kinstr = snd_seq_instr_find(opl3->ilist, &wanted, 1, 0); 356 if (kinstr == NULL) { 357 spin_unlock_irqrestore(&opl3->voice_lock, flags); 358 return; 359 } 360 361 fm = KINSTR_DATA(kinstr); 362 363 switch (fm->type) { 364 case FM_PATCH_OPL2: 365 instr_4op = 0; 366 break; 367 case FM_PATCH_OPL3: 368 if (opl3->hardware >= OPL3_HW_OPL3) { 369 instr_4op = 1; 370 break; 371 } 372 default: 373 snd_seq_instr_free_use(opl3->ilist, kinstr); 374 spin_unlock_irqrestore(&opl3->voice_lock, flags); 375 return; 376 } 377 378 #ifdef DEBUG_MIDI 379 snd_printk(" --> OPL%i instrument: %s\n", 380 instr_4op ? 3 : 2, kinstr->name); 381 #endif 382 /* in SYNTH mode, application takes care of voices */ 383 /* in SEQ mode, allocate voice on free OPL3 channel */ 384 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 385 voice = opl3_get_voice(opl3, instr_4op, chan); 386 } else { 387 /* remap OSS voice */ 388 voice = snd_opl3_oss_map[chan->number]; 389 } 390 391 if (voice < MAX_OPL2_VOICES) { 392 /* Left register block for voices 0 .. 8 */ 393 reg_side = OPL3_LEFT; 394 voice_offset = voice; 395 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; 396 } else { 397 /* Right register block for voices 9 .. 17 */ 398 reg_side = OPL3_RIGHT; 399 voice_offset = voice - MAX_OPL2_VOICES; 400 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; 401 } 402 403 /* kill voice on channel */ 404 vp = &opl3->voices[voice]; 405 if (vp->state > 0) { 406 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 407 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 408 opl3->command(opl3, opl3_reg, reg_val); 409 } 410 if (instr_4op) { 411 vp2 = &opl3->voices[voice + 3]; 412 if (vp->state > 0) { 413 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + 414 voice_offset + 3); 415 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 416 opl3->command(opl3, opl3_reg, reg_val); 417 } 418 } 419 420 /* set connection register */ 421 if (instr_4op) { 422 if ((opl3->connection_reg ^ connect_mask) & connect_mask) { 423 opl3->connection_reg |= connect_mask; 424 /* set connection bit */ 425 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 426 opl3->command(opl3, opl3_reg, opl3->connection_reg); 427 } 428 } else { 429 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { 430 opl3->connection_reg &= ~connect_mask; 431 /* clear connection bit */ 432 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 433 opl3->command(opl3, opl3_reg, opl3->connection_reg); 434 } 435 } 436 437 #ifdef DEBUG_MIDI 438 snd_printk(" --> setting OPL3 connection: 0x%x\n", 439 opl3->connection_reg); 440 #endif 441 /* 442 * calculate volume depending on connection 443 * between FM operators (see include/opl3.h) 444 */ 445 for (i = 0; i < (instr_4op ? 4 : 2); i++) 446 vol_op[i] = fm->op[i].ksl_level; 447 448 connection = fm->feedback_connection[0] & 0x01; 449 if (instr_4op) { 450 connection <<= 1; 451 connection |= fm->feedback_connection[1] & 0x01; 452 453 snd_opl3_calc_volume(&vol_op[3], vel, chan); 454 switch (connection) { 455 case 0x03: 456 snd_opl3_calc_volume(&vol_op[2], vel, chan); 457 /* fallthru */ 458 case 0x02: 459 snd_opl3_calc_volume(&vol_op[0], vel, chan); 460 break; 461 case 0x01: 462 snd_opl3_calc_volume(&vol_op[1], vel, chan); 463 } 464 } else { 465 snd_opl3_calc_volume(&vol_op[1], vel, chan); 466 if (connection) 467 snd_opl3_calc_volume(&vol_op[0], vel, chan); 468 } 469 470 /* Program the FM voice characteristics */ 471 for (i = 0; i < (instr_4op ? 4 : 2); i++) { 472 #ifdef DEBUG_MIDI 473 snd_printk(" --> programming operator %i\n", i); 474 #endif 475 op_offset = snd_opl3_regmap[voice_offset][i]; 476 477 /* Set OPL3 AM_VIB register of requested voice/operator */ 478 reg_val = fm->op[i].am_vib; 479 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); 480 opl3->command(opl3, opl3_reg, reg_val); 481 482 /* Set OPL3 KSL_LEVEL register of requested voice/operator */ 483 reg_val = vol_op[i]; 484 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); 485 opl3->command(opl3, opl3_reg, reg_val); 486 487 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 488 reg_val = fm->op[i].attack_decay; 489 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); 490 opl3->command(opl3, opl3_reg, reg_val); 491 492 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 493 reg_val = fm->op[i].sustain_release; 494 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); 495 opl3->command(opl3, opl3_reg, reg_val); 496 497 /* Select waveform */ 498 reg_val = fm->op[i].wave_select; 499 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); 500 opl3->command(opl3, opl3_reg, reg_val); 501 } 502 503 /* Set operator feedback and 2op inter-operator connection */ 504 reg_val = fm->feedback_connection[0]; 505 /* Set output voice connection */ 506 reg_val |= OPL3_STEREO_BITS; 507 if (chan->gm_pan < 43) 508 reg_val &= ~OPL3_VOICE_TO_RIGHT; 509 if (chan->gm_pan > 85) 510 reg_val &= ~OPL3_VOICE_TO_LEFT; 511 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); 512 opl3->command(opl3, opl3_reg, reg_val); 513 514 if (instr_4op) { 515 /* Set 4op inter-operator connection */ 516 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; 517 /* Set output voice connection */ 518 reg_val |= OPL3_STEREO_BITS; 519 if (chan->gm_pan < 43) 520 reg_val &= ~OPL3_VOICE_TO_RIGHT; 521 if (chan->gm_pan > 85) 522 reg_val &= ~OPL3_VOICE_TO_LEFT; 523 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + 524 voice_offset + 3); 525 opl3->command(opl3, opl3_reg, reg_val); 526 } 527 528 /* 529 * Special treatment of percussion notes for fm: 530 * Requested pitch is really program, and pitch for 531 * device is whatever was specified in the patch library. 532 */ 533 if (fm->fix_key) 534 note = fm->fix_key; 535 /* 536 * use transpose if defined in patch library 537 */ 538 if (fm->trnsps) 539 note += (fm->trnsps - 64); 540 541 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); 542 543 /* Set OPL3 FNUM_LOW register of requested voice */ 544 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 545 opl3->command(opl3, opl3_reg, fnum); 546 547 opl3->voices[voice].keyon_reg = blocknum; 548 549 /* Set output sound flag */ 550 blocknum |= OPL3_KEYON_BIT; 551 552 #ifdef DEBUG_MIDI 553 snd_printk(" --> trigger voice %i\n", voice); 554 #endif 555 /* Set OPL3 KEYON_BLOCK register of requested voice */ 556 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 557 opl3->command(opl3, opl3_reg, blocknum); 558 559 /* kill note after fixed duration (in centiseconds) */ 560 if (fm->fix_dur) { 561 opl3->voices[voice].note_off = jiffies + 562 (fm->fix_dur * HZ) / 100; 563 snd_opl3_start_timer(opl3); 564 opl3->voices[voice].note_off_check = 1; 565 } else 566 opl3->voices[voice].note_off_check = 0; 567 568 /* get extra pgm, but avoid possible loops */ 569 extra_prg = (extra_prg) ? 0 : fm->modes; 570 571 snd_seq_instr_free_use(opl3->ilist, kinstr); 572 573 /* do the bookkeeping */ 574 vp->time = opl3->use_time++; 575 vp->note = key; 576 vp->chan = chan; 577 578 if (instr_4op) { 579 vp->state = SNDRV_OPL3_ST_ON_4OP; 580 581 vp2 = &opl3->voices[voice + 3]; 582 vp2->time = opl3->use_time++; 583 vp2->note = key; 584 vp2->chan = chan; 585 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; 586 } else { 587 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 588 /* 4op killed by 2op, release bounded voice */ 589 vp2 = &opl3->voices[voice + 3]; 590 vp2->time = opl3->use_time++; 591 vp2->state = SNDRV_OPL3_ST_OFF; 592 } 593 vp->state = SNDRV_OPL3_ST_ON_2OP; 594 } 595 596 #ifdef DEBUG_ALLOC 597 debug_alloc(opl3, "note on ", voice); 598 #endif 599 600 /* allocate extra program if specified in patch library */ 601 if (extra_prg) { 602 if (extra_prg > 128) { 603 wanted.bank = 128; 604 /* percussions start at 35 */ 605 wanted.prg = extra_prg - 128 + 35 - 1; 606 } else { 607 wanted.bank = 0; 608 wanted.prg = extra_prg - 1; 609 } 610 #ifdef DEBUG_MIDI 611 snd_printk(" *** allocating extra program\n"); 612 #endif 613 goto __extra_prg; 614 } 615 spin_unlock_irqrestore(&opl3->voice_lock, flags); 616 } 617 618 static void snd_opl3_kill_voice(opl3_t *opl3, int voice) 619 { 620 unsigned short reg_side; 621 unsigned char voice_offset; 622 unsigned short opl3_reg; 623 624 snd_opl3_voice_t *vp, *vp2; 625 626 snd_assert(voice < MAX_OPL3_VOICES, return); 627 628 vp = &opl3->voices[voice]; 629 if (voice < MAX_OPL2_VOICES) { 630 /* Left register block for voices 0 .. 8 */ 631 reg_side = OPL3_LEFT; 632 voice_offset = voice; 633 } else { 634 /* Right register block for voices 9 .. 17 */ 635 reg_side = OPL3_RIGHT; 636 voice_offset = voice - MAX_OPL2_VOICES; 637 } 638 639 /* kill voice */ 640 #ifdef DEBUG_MIDI 641 snd_printk(" --> kill voice %i\n", voice); 642 #endif 643 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 644 /* clear Key ON bit */ 645 opl3->command(opl3, opl3_reg, vp->keyon_reg); 646 647 /* do the bookkeeping */ 648 vp->time = opl3->use_time++; 649 650 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 651 vp2 = &opl3->voices[voice + 3]; 652 653 vp2->time = opl3->use_time++; 654 vp2->state = SNDRV_OPL3_ST_OFF; 655 } 656 vp->state = SNDRV_OPL3_ST_OFF; 657 #ifdef DEBUG_ALLOC 658 debug_alloc(opl3, "note off", voice); 659 #endif 660 661 } 662 663 /* 664 * Release a note in response to a midi note off. 665 */ 666 void snd_opl3_note_off(void *p, int note, int vel, snd_midi_channel_t *chan) 667 { 668 opl3_t *opl3; 669 670 int voice; 671 snd_opl3_voice_t *vp; 672 673 unsigned long flags; 674 675 opl3 = p; 676 677 #ifdef DEBUG_MIDI 678 snd_printk("Note off, ch %i, inst %i, note %i\n", 679 chan->number, chan->midi_program, note); 680 #endif 681 682 spin_lock_irqsave(&opl3->voice_lock, flags); 683 684 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 685 if (chan->drum_channel && use_internal_drums) { 686 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 687 spin_unlock_irqrestore(&opl3->voice_lock, flags); 688 return; 689 } 690 /* this loop will hopefully kill all extra voices, because 691 they are grouped by the same channel and note values */ 692 for (voice = 0; voice < opl3->max_voices; voice++) { 693 vp = &opl3->voices[voice]; 694 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 695 snd_opl3_kill_voice(opl3, voice); 696 } 697 } 698 } else { 699 /* remap OSS voices */ 700 if (chan->number < MAX_OPL3_VOICES) { 701 voice = snd_opl3_oss_map[chan->number]; 702 snd_opl3_kill_voice(opl3, voice); 703 } 704 } 705 spin_unlock_irqrestore(&opl3->voice_lock, flags); 706 } 707 708 /* 709 * key pressure change 710 */ 711 void snd_opl3_key_press(void *p, int note, int vel, snd_midi_channel_t *chan) 712 { 713 opl3_t *opl3; 714 715 opl3 = p; 716 #ifdef DEBUG_MIDI 717 snd_printk("Key pressure, ch#: %i, inst#: %i\n", 718 chan->number, chan->midi_program); 719 #endif 720 } 721 722 /* 723 * terminate note 724 */ 725 void snd_opl3_terminate_note(void *p, int note, snd_midi_channel_t *chan) 726 { 727 opl3_t *opl3; 728 729 opl3 = p; 730 #ifdef DEBUG_MIDI 731 snd_printk("Terminate note, ch#: %i, inst#: %i\n", 732 chan->number, chan->midi_program); 733 #endif 734 } 735 736 static void snd_opl3_update_pitch(opl3_t *opl3, int voice) 737 { 738 unsigned short reg_side; 739 unsigned char voice_offset; 740 unsigned short opl3_reg; 741 742 unsigned char fnum, blocknum; 743 744 snd_opl3_voice_t *vp; 745 746 snd_assert(voice < MAX_OPL3_VOICES, return); 747 748 vp = &opl3->voices[voice]; 749 if (vp->chan == NULL) 750 return; /* not allocated? */ 751 752 if (voice < MAX_OPL2_VOICES) { 753 /* Left register block for voices 0 .. 8 */ 754 reg_side = OPL3_LEFT; 755 voice_offset = voice; 756 } else { 757 /* Right register block for voices 9 .. 17 */ 758 reg_side = OPL3_RIGHT; 759 voice_offset = voice - MAX_OPL2_VOICES; 760 } 761 762 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 763 764 /* Set OPL3 FNUM_LOW register of requested voice */ 765 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 766 opl3->command(opl3, opl3_reg, fnum); 767 768 vp->keyon_reg = blocknum; 769 770 /* Set output sound flag */ 771 blocknum |= OPL3_KEYON_BIT; 772 773 /* Set OPL3 KEYON_BLOCK register of requested voice */ 774 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 775 opl3->command(opl3, opl3_reg, blocknum); 776 777 vp->time = opl3->use_time++; 778 } 779 780 /* 781 * Update voice pitch controller 782 */ 783 static void snd_opl3_pitch_ctrl(opl3_t *opl3, snd_midi_channel_t *chan) 784 { 785 int voice; 786 snd_opl3_voice_t *vp; 787 788 unsigned long flags; 789 790 spin_lock_irqsave(&opl3->voice_lock, flags); 791 792 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 793 for (voice = 0; voice < opl3->max_voices; voice++) { 794 vp = &opl3->voices[voice]; 795 if (vp->state > 0 && vp->chan == chan) { 796 snd_opl3_update_pitch(opl3, voice); 797 } 798 } 799 } else { 800 /* remap OSS voices */ 801 if (chan->number < MAX_OPL3_VOICES) { 802 voice = snd_opl3_oss_map[chan->number]; 803 snd_opl3_update_pitch(opl3, voice); 804 } 805 } 806 spin_unlock_irqrestore(&opl3->voice_lock, flags); 807 } 808 809 /* 810 * Deal with a controler type event. This includes all types of 811 * control events, not just the midi controllers 812 */ 813 void snd_opl3_control(void *p, int type, snd_midi_channel_t *chan) 814 { 815 opl3_t *opl3; 816 817 opl3 = p; 818 #ifdef DEBUG_MIDI 819 snd_printk("Controller, TYPE = %i, ch#: %i, inst#: %i\n", 820 type, chan->number, chan->midi_program); 821 #endif 822 823 switch (type) { 824 case MIDI_CTL_MSB_MODWHEEL: 825 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 826 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 827 else 828 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 829 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 830 opl3->drum_reg); 831 break; 832 case MIDI_CTL_E2_TREMOLO_DEPTH: 833 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 834 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 835 else 836 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 837 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 838 opl3->drum_reg); 839 break; 840 case MIDI_CTL_PITCHBEND: 841 snd_opl3_pitch_ctrl(opl3, chan); 842 break; 843 } 844 } 845 846 /* 847 * NRPN events 848 */ 849 void snd_opl3_nrpn(void *p, snd_midi_channel_t *chan, 850 snd_midi_channel_set_t *chset) 851 { 852 opl3_t *opl3; 853 854 opl3 = p; 855 #ifdef DEBUG_MIDI 856 snd_printk("NRPN, ch#: %i, inst#: %i\n", 857 chan->number, chan->midi_program); 858 #endif 859 } 860 861 /* 862 * receive sysex 863 */ 864 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 865 int parsed, snd_midi_channel_set_t *chset) 866 { 867 opl3_t *opl3; 868 869 opl3 = p; 870 #ifdef DEBUG_MIDI 871 snd_printk("SYSEX\n"); 872 #endif 873 } 874