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 bool use_internal_drums; 31 32 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 33 struct snd_midi_channel *chan); 34 /* 35 * The next table looks magical, but it certainly is not. Its values have 36 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception 37 * for i=0. This log-table converts a linear volume-scaling (0..127) to a 38 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume 39 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative 40 * volume -8 it was implemented as a table because it is only 128 bytes and 41 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) 42 */ 43 44 static char opl3_volume_table[128] = 45 { 46 -63, -48, -40, -35, -32, -29, -27, -26, 47 -24, -23, -21, -20, -19, -18, -18, -17, 48 -16, -15, -15, -14, -13, -13, -12, -12, 49 -11, -11, -10, -10, -10, -9, -9, -8, 50 -8, -8, -7, -7, -7, -6, -6, -6, 51 -5, -5, -5, -5, -4, -4, -4, -4, 52 -3, -3, -3, -3, -2, -2, -2, -2, 53 -2, -1, -1, -1, -1, 0, 0, 0, 54 0, 0, 0, 1, 1, 1, 1, 1, 55 1, 2, 2, 2, 2, 2, 2, 2, 56 3, 3, 3, 3, 3, 3, 3, 4, 57 4, 4, 4, 4, 4, 4, 4, 5, 58 5, 5, 5, 5, 5, 5, 5, 5, 59 6, 6, 6, 6, 6, 6, 6, 6, 60 6, 7, 7, 7, 7, 7, 7, 7, 61 7, 7, 7, 8, 8, 8, 8, 8 62 }; 63 64 void snd_opl3_calc_volume(unsigned char *volbyte, int vel, 65 struct snd_midi_channel *chan) 66 { 67 int oldvol, newvol, n; 68 int volume; 69 70 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); 71 if (volume > 127) 72 volume = 127; 73 74 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); 75 76 newvol = opl3_volume_table[volume] + oldvol; 77 if (newvol > OPL3_TOTAL_LEVEL_MASK) 78 newvol = OPL3_TOTAL_LEVEL_MASK; 79 else if (newvol < 0) 80 newvol = 0; 81 82 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); 83 84 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); 85 } 86 87 /* 88 * Converts the note frequency to block and fnum values for the FM chip 89 */ 90 static short opl3_note_table[16] = 91 { 92 305, 323, /* for pitch bending, -2 semitones */ 93 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 94 686, 726 /* for pitch bending, +2 semitones */ 95 }; 96 97 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, 98 int note, struct snd_midi_channel *chan) 99 { 100 int block = ((note / 12) & 0x07) - 1; 101 int idx = (note % 12) + 2; 102 int freq; 103 104 if (chan->midi_pitchbend) { 105 int pitchbend = chan->midi_pitchbend; 106 int segment; 107 108 if (pitchbend < -0x2000) 109 pitchbend = -0x2000; 110 if (pitchbend > 0x1FFF) 111 pitchbend = 0x1FFF; 112 113 segment = pitchbend / 0x1000; 114 freq = opl3_note_table[idx+segment]; 115 freq += ((opl3_note_table[idx+segment+1] - freq) * 116 (pitchbend % 0x1000)) / 0x1000; 117 } else { 118 freq = opl3_note_table[idx]; 119 } 120 121 *fnum = (unsigned char) freq; 122 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | 123 ((block << 2) & OPL3_BLOCKNUM_MASK); 124 } 125 126 127 #ifdef DEBUG_ALLOC 128 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { 129 int i; 130 char *str = "x.24"; 131 132 printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); 133 for (i = 0; i < opl3->max_voices; i++) 134 printk("%c", *(str + opl3->voices[i].state + 1)); 135 printk("\n"); 136 } 137 #endif 138 139 /* 140 * Get a FM voice (channel) to play a note on. 141 */ 142 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, 143 struct snd_midi_channel *chan) { 144 int chan_4op_1; /* first voice for 4op instrument */ 145 int chan_4op_2; /* second voice for 4op instrument */ 146 147 struct snd_opl3_voice *vp, *vp2; 148 unsigned int voice_time; 149 int i; 150 151 #ifdef DEBUG_ALLOC 152 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; 153 #endif 154 155 /* This is our "allocation cost" table */ 156 enum { 157 FREE = 0, CHEAP, EXPENSIVE, END 158 }; 159 160 /* Keeps track of what we are finding */ 161 struct best { 162 unsigned int time; 163 int voice; 164 } best[END]; 165 struct best *bp; 166 167 for (i = 0; i < END; i++) { 168 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ 169 best[i].voice = -1; 170 } 171 172 /* Look through all the channels for the most suitable. */ 173 for (i = 0; i < opl3->max_voices; i++) { 174 vp = &opl3->voices[i]; 175 176 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) 177 /* skip unavailable channels, allocated by 178 drum voices or by bounded 4op voices) */ 179 continue; 180 181 voice_time = vp->time; 182 bp = best; 183 184 chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); 185 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); 186 if (instr_4op) { 187 /* allocate 4op voice */ 188 /* skip channels unavailable to 4op instrument */ 189 if (!chan_4op_1) 190 continue; 191 192 if (vp->state) 193 /* kill one voice, CHEAP */ 194 bp++; 195 /* get state of bounded 2op channel 196 to be allocated for 4op instrument */ 197 vp2 = &opl3->voices[i + 3]; 198 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { 199 /* kill two voices, EXPENSIVE */ 200 bp++; 201 voice_time = (voice_time > vp->time) ? 202 voice_time : vp->time; 203 } 204 } else { 205 /* allocate 2op voice */ 206 if ((chan_4op_1) || (chan_4op_2)) 207 /* use bounded channels for 2op, CHEAP */ 208 bp++; 209 else if (vp->state) 210 /* kill one voice on 2op channel, CHEAP */ 211 bp++; 212 /* raise kill cost to EXPENSIVE for all channels */ 213 if (vp->state) 214 bp++; 215 } 216 if (voice_time < bp->time) { 217 bp->time = voice_time; 218 bp->voice = i; 219 } 220 } 221 222 for (i = 0; i < END; i++) { 223 if (best[i].voice >= 0) { 224 #ifdef DEBUG_ALLOC 225 printk(KERN_DEBUG "%s %iop allocation on voice %i\n", 226 alloc_type[i], instr_4op ? 4 : 2, 227 best[i].voice); 228 #endif 229 return best[i].voice; 230 } 231 } 232 /* not found */ 233 return -1; 234 } 235 236 /* ------------------------------ */ 237 238 /* 239 * System timer interrupt function 240 */ 241 void snd_opl3_timer_func(unsigned long data) 242 { 243 244 struct snd_opl3 *opl3 = (struct snd_opl3 *)data; 245 unsigned long flags; 246 int again = 0; 247 int i; 248 249 spin_lock_irqsave(&opl3->voice_lock, flags); 250 for (i = 0; i < opl3->max_voices; i++) { 251 struct snd_opl3_voice *vp = &opl3->voices[i]; 252 if (vp->state > 0 && vp->note_off_check) { 253 if (vp->note_off == jiffies) 254 snd_opl3_note_off_unsafe(opl3, vp->note, 0, 255 vp->chan); 256 else 257 again++; 258 } 259 } 260 spin_unlock_irqrestore(&opl3->voice_lock, flags); 261 262 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 263 if (again) 264 mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ 265 else 266 opl3->sys_timer_status = 0; 267 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 268 } 269 270 /* 271 * Start system timer 272 */ 273 static void snd_opl3_start_timer(struct snd_opl3 *opl3) 274 { 275 unsigned long flags; 276 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 277 if (! opl3->sys_timer_status) { 278 mod_timer(&opl3->tlist, jiffies + 1); 279 opl3->sys_timer_status = 1; 280 } 281 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 282 } 283 284 /* ------------------------------ */ 285 286 287 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { 288 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 289 }; 290 291 /* 292 * Start a note. 293 */ 294 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 295 { 296 struct snd_opl3 *opl3; 297 int instr_4op; 298 299 int voice; 300 struct snd_opl3_voice *vp, *vp2; 301 unsigned short connect_mask; 302 unsigned char connection; 303 unsigned char vol_op[4]; 304 305 int extra_prg = 0; 306 307 unsigned short reg_side; 308 unsigned char op_offset; 309 unsigned char voice_offset; 310 unsigned short opl3_reg; 311 unsigned char reg_val; 312 unsigned char prg, bank; 313 314 int key = note; 315 unsigned char fnum, blocknum; 316 int i; 317 318 struct fm_patch *patch; 319 struct fm_instrument *fm; 320 unsigned long flags; 321 322 opl3 = p; 323 324 #ifdef DEBUG_MIDI 325 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", 326 chan->number, chan->midi_program, note, vel); 327 #endif 328 329 /* in SYNTH mode, application takes care of voices */ 330 /* in SEQ mode, drum voice numbers are notes on drum channel */ 331 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 332 if (chan->drum_channel) { 333 /* percussion instruments are located in bank 128 */ 334 bank = 128; 335 prg = note; 336 } else { 337 bank = chan->gm_bank_select; 338 prg = chan->midi_program; 339 } 340 } else { 341 /* Prepare for OSS mode */ 342 if (chan->number >= MAX_OPL3_VOICES) 343 return; 344 345 /* OSS instruments are located in bank 127 */ 346 bank = 127; 347 prg = chan->midi_program; 348 } 349 350 spin_lock_irqsave(&opl3->voice_lock, flags); 351 352 if (use_internal_drums) { 353 snd_opl3_drum_switch(opl3, note, vel, 1, chan); 354 spin_unlock_irqrestore(&opl3->voice_lock, flags); 355 return; 356 } 357 358 __extra_prg: 359 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 360 if (!patch) { 361 spin_unlock_irqrestore(&opl3->voice_lock, flags); 362 return; 363 } 364 365 fm = &patch->inst; 366 switch (patch->type) { 367 case FM_PATCH_OPL2: 368 instr_4op = 0; 369 break; 370 case FM_PATCH_OPL3: 371 if (opl3->hardware >= OPL3_HW_OPL3) { 372 instr_4op = 1; 373 break; 374 } 375 default: 376 spin_unlock_irqrestore(&opl3->voice_lock, flags); 377 return; 378 } 379 #ifdef DEBUG_MIDI 380 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", 381 instr_4op ? 3 : 2, patch->name); 382 #endif 383 /* in SYNTH mode, application takes care of voices */ 384 /* in SEQ mode, allocate voice on free OPL3 channel */ 385 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 386 voice = opl3_get_voice(opl3, instr_4op, chan); 387 } else { 388 /* remap OSS voice */ 389 voice = snd_opl3_oss_map[chan->number]; 390 } 391 392 if (voice < 0) { 393 spin_unlock_irqrestore(&opl3->voice_lock, flags); 394 return; 395 } 396 397 if (voice < MAX_OPL2_VOICES) { 398 /* Left register block for voices 0 .. 8 */ 399 reg_side = OPL3_LEFT; 400 voice_offset = voice; 401 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; 402 } else { 403 /* Right register block for voices 9 .. 17 */ 404 reg_side = OPL3_RIGHT; 405 voice_offset = voice - MAX_OPL2_VOICES; 406 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; 407 } 408 409 /* kill voice on channel */ 410 vp = &opl3->voices[voice]; 411 if (vp->state > 0) { 412 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 413 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 414 opl3->command(opl3, opl3_reg, reg_val); 415 } 416 if (instr_4op) { 417 vp2 = &opl3->voices[voice + 3]; 418 if (vp->state > 0) { 419 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + 420 voice_offset + 3); 421 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 422 opl3->command(opl3, opl3_reg, reg_val); 423 } 424 } 425 426 /* set connection register */ 427 if (instr_4op) { 428 if ((opl3->connection_reg ^ connect_mask) & connect_mask) { 429 opl3->connection_reg |= connect_mask; 430 /* set connection bit */ 431 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 432 opl3->command(opl3, opl3_reg, opl3->connection_reg); 433 } 434 } else { 435 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { 436 opl3->connection_reg &= ~connect_mask; 437 /* clear connection bit */ 438 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 439 opl3->command(opl3, opl3_reg, opl3->connection_reg); 440 } 441 } 442 443 #ifdef DEBUG_MIDI 444 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", 445 opl3->connection_reg); 446 #endif 447 /* 448 * calculate volume depending on connection 449 * between FM operators (see include/opl3.h) 450 */ 451 for (i = 0; i < (instr_4op ? 4 : 2); i++) 452 vol_op[i] = fm->op[i].ksl_level; 453 454 connection = fm->feedback_connection[0] & 0x01; 455 if (instr_4op) { 456 connection <<= 1; 457 connection |= fm->feedback_connection[1] & 0x01; 458 459 snd_opl3_calc_volume(&vol_op[3], vel, chan); 460 switch (connection) { 461 case 0x03: 462 snd_opl3_calc_volume(&vol_op[2], vel, chan); 463 /* fallthru */ 464 case 0x02: 465 snd_opl3_calc_volume(&vol_op[0], vel, chan); 466 break; 467 case 0x01: 468 snd_opl3_calc_volume(&vol_op[1], vel, chan); 469 } 470 } else { 471 snd_opl3_calc_volume(&vol_op[1], vel, chan); 472 if (connection) 473 snd_opl3_calc_volume(&vol_op[0], vel, chan); 474 } 475 476 /* Program the FM voice characteristics */ 477 for (i = 0; i < (instr_4op ? 4 : 2); i++) { 478 #ifdef DEBUG_MIDI 479 snd_printk(KERN_DEBUG " --> programming operator %i\n", i); 480 #endif 481 op_offset = snd_opl3_regmap[voice_offset][i]; 482 483 /* Set OPL3 AM_VIB register of requested voice/operator */ 484 reg_val = fm->op[i].am_vib; 485 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); 486 opl3->command(opl3, opl3_reg, reg_val); 487 488 /* Set OPL3 KSL_LEVEL register of requested voice/operator */ 489 reg_val = vol_op[i]; 490 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); 491 opl3->command(opl3, opl3_reg, reg_val); 492 493 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 494 reg_val = fm->op[i].attack_decay; 495 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); 496 opl3->command(opl3, opl3_reg, reg_val); 497 498 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 499 reg_val = fm->op[i].sustain_release; 500 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); 501 opl3->command(opl3, opl3_reg, reg_val); 502 503 /* Select waveform */ 504 reg_val = fm->op[i].wave_select; 505 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); 506 opl3->command(opl3, opl3_reg, reg_val); 507 } 508 509 /* Set operator feedback and 2op inter-operator connection */ 510 reg_val = fm->feedback_connection[0]; 511 /* Set output voice connection */ 512 reg_val |= OPL3_STEREO_BITS; 513 if (chan->gm_pan < 43) 514 reg_val &= ~OPL3_VOICE_TO_RIGHT; 515 if (chan->gm_pan > 85) 516 reg_val &= ~OPL3_VOICE_TO_LEFT; 517 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); 518 opl3->command(opl3, opl3_reg, reg_val); 519 520 if (instr_4op) { 521 /* Set 4op inter-operator connection */ 522 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; 523 /* Set output voice connection */ 524 reg_val |= OPL3_STEREO_BITS; 525 if (chan->gm_pan < 43) 526 reg_val &= ~OPL3_VOICE_TO_RIGHT; 527 if (chan->gm_pan > 85) 528 reg_val &= ~OPL3_VOICE_TO_LEFT; 529 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + 530 voice_offset + 3); 531 opl3->command(opl3, opl3_reg, reg_val); 532 } 533 534 /* 535 * Special treatment of percussion notes for fm: 536 * Requested pitch is really program, and pitch for 537 * device is whatever was specified in the patch library. 538 */ 539 if (fm->fix_key) 540 note = fm->fix_key; 541 /* 542 * use transpose if defined in patch library 543 */ 544 if (fm->trnsps) 545 note += (fm->trnsps - 64); 546 547 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); 548 549 /* Set OPL3 FNUM_LOW register of requested voice */ 550 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 551 opl3->command(opl3, opl3_reg, fnum); 552 553 opl3->voices[voice].keyon_reg = blocknum; 554 555 /* Set output sound flag */ 556 blocknum |= OPL3_KEYON_BIT; 557 558 #ifdef DEBUG_MIDI 559 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); 560 #endif 561 /* Set OPL3 KEYON_BLOCK register of requested voice */ 562 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 563 opl3->command(opl3, opl3_reg, blocknum); 564 565 /* kill note after fixed duration (in centiseconds) */ 566 if (fm->fix_dur) { 567 opl3->voices[voice].note_off = jiffies + 568 (fm->fix_dur * HZ) / 100; 569 snd_opl3_start_timer(opl3); 570 opl3->voices[voice].note_off_check = 1; 571 } else 572 opl3->voices[voice].note_off_check = 0; 573 574 /* get extra pgm, but avoid possible loops */ 575 extra_prg = (extra_prg) ? 0 : fm->modes; 576 577 /* do the bookkeeping */ 578 vp->time = opl3->use_time++; 579 vp->note = key; 580 vp->chan = chan; 581 582 if (instr_4op) { 583 vp->state = SNDRV_OPL3_ST_ON_4OP; 584 585 vp2 = &opl3->voices[voice + 3]; 586 vp2->time = opl3->use_time++; 587 vp2->note = key; 588 vp2->chan = chan; 589 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; 590 } else { 591 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 592 /* 4op killed by 2op, release bounded voice */ 593 vp2 = &opl3->voices[voice + 3]; 594 vp2->time = opl3->use_time++; 595 vp2->state = SNDRV_OPL3_ST_OFF; 596 } 597 vp->state = SNDRV_OPL3_ST_ON_2OP; 598 } 599 600 #ifdef DEBUG_ALLOC 601 debug_alloc(opl3, "note on ", voice); 602 #endif 603 604 /* allocate extra program if specified in patch library */ 605 if (extra_prg) { 606 if (extra_prg > 128) { 607 bank = 128; 608 /* percussions start at 35 */ 609 prg = extra_prg - 128 + 35 - 1; 610 } else { 611 bank = 0; 612 prg = extra_prg - 1; 613 } 614 #ifdef DEBUG_MIDI 615 snd_printk(KERN_DEBUG " *** allocating extra program\n"); 616 #endif 617 goto __extra_prg; 618 } 619 spin_unlock_irqrestore(&opl3->voice_lock, flags); 620 } 621 622 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 623 { 624 unsigned short reg_side; 625 unsigned char voice_offset; 626 unsigned short opl3_reg; 627 628 struct snd_opl3_voice *vp, *vp2; 629 630 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 631 return; 632 633 vp = &opl3->voices[voice]; 634 if (voice < MAX_OPL2_VOICES) { 635 /* Left register block for voices 0 .. 8 */ 636 reg_side = OPL3_LEFT; 637 voice_offset = voice; 638 } else { 639 /* Right register block for voices 9 .. 17 */ 640 reg_side = OPL3_RIGHT; 641 voice_offset = voice - MAX_OPL2_VOICES; 642 } 643 644 /* kill voice */ 645 #ifdef DEBUG_MIDI 646 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); 647 #endif 648 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 649 /* clear Key ON bit */ 650 opl3->command(opl3, opl3_reg, vp->keyon_reg); 651 652 /* do the bookkeeping */ 653 vp->time = opl3->use_time++; 654 655 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 656 vp2 = &opl3->voices[voice + 3]; 657 658 vp2->time = opl3->use_time++; 659 vp2->state = SNDRV_OPL3_ST_OFF; 660 } 661 vp->state = SNDRV_OPL3_ST_OFF; 662 #ifdef DEBUG_ALLOC 663 debug_alloc(opl3, "note off", voice); 664 #endif 665 666 } 667 668 /* 669 * Release a note in response to a midi note off. 670 */ 671 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 672 struct snd_midi_channel *chan) 673 { 674 struct snd_opl3 *opl3; 675 676 int voice; 677 struct snd_opl3_voice *vp; 678 679 opl3 = p; 680 681 #ifdef DEBUG_MIDI 682 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", 683 chan->number, chan->midi_program, note); 684 #endif 685 686 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 687 if (chan->drum_channel && use_internal_drums) { 688 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 689 return; 690 } 691 /* this loop will hopefully kill all extra voices, because 692 they are grouped by the same channel and note values */ 693 for (voice = 0; voice < opl3->max_voices; voice++) { 694 vp = &opl3->voices[voice]; 695 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 696 snd_opl3_kill_voice(opl3, voice); 697 } 698 } 699 } else { 700 /* remap OSS voices */ 701 if (chan->number < MAX_OPL3_VOICES) { 702 voice = snd_opl3_oss_map[chan->number]; 703 snd_opl3_kill_voice(opl3, voice); 704 } 705 } 706 } 707 708 void snd_opl3_note_off(void *p, int note, int vel, 709 struct snd_midi_channel *chan) 710 { 711 struct snd_opl3 *opl3 = p; 712 unsigned long flags; 713 714 spin_lock_irqsave(&opl3->voice_lock, flags); 715 snd_opl3_note_off_unsafe(p, note, vel, chan); 716 spin_unlock_irqrestore(&opl3->voice_lock, flags); 717 } 718 719 /* 720 * key pressure change 721 */ 722 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 723 { 724 struct snd_opl3 *opl3; 725 726 opl3 = p; 727 #ifdef DEBUG_MIDI 728 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", 729 chan->number, chan->midi_program); 730 #endif 731 } 732 733 /* 734 * terminate note 735 */ 736 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 737 { 738 struct snd_opl3 *opl3; 739 740 opl3 = p; 741 #ifdef DEBUG_MIDI 742 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", 743 chan->number, chan->midi_program); 744 #endif 745 } 746 747 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 748 { 749 unsigned short reg_side; 750 unsigned char voice_offset; 751 unsigned short opl3_reg; 752 753 unsigned char fnum, blocknum; 754 755 struct snd_opl3_voice *vp; 756 757 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 758 return; 759 760 vp = &opl3->voices[voice]; 761 if (vp->chan == NULL) 762 return; /* not allocated? */ 763 764 if (voice < MAX_OPL2_VOICES) { 765 /* Left register block for voices 0 .. 8 */ 766 reg_side = OPL3_LEFT; 767 voice_offset = voice; 768 } else { 769 /* Right register block for voices 9 .. 17 */ 770 reg_side = OPL3_RIGHT; 771 voice_offset = voice - MAX_OPL2_VOICES; 772 } 773 774 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 775 776 /* Set OPL3 FNUM_LOW register of requested voice */ 777 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 778 opl3->command(opl3, opl3_reg, fnum); 779 780 vp->keyon_reg = blocknum; 781 782 /* Set output sound flag */ 783 blocknum |= OPL3_KEYON_BIT; 784 785 /* Set OPL3 KEYON_BLOCK register of requested voice */ 786 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 787 opl3->command(opl3, opl3_reg, blocknum); 788 789 vp->time = opl3->use_time++; 790 } 791 792 /* 793 * Update voice pitch controller 794 */ 795 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 796 { 797 int voice; 798 struct snd_opl3_voice *vp; 799 800 unsigned long flags; 801 802 spin_lock_irqsave(&opl3->voice_lock, flags); 803 804 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 805 for (voice = 0; voice < opl3->max_voices; voice++) { 806 vp = &opl3->voices[voice]; 807 if (vp->state > 0 && vp->chan == chan) { 808 snd_opl3_update_pitch(opl3, voice); 809 } 810 } 811 } else { 812 /* remap OSS voices */ 813 if (chan->number < MAX_OPL3_VOICES) { 814 voice = snd_opl3_oss_map[chan->number]; 815 snd_opl3_update_pitch(opl3, voice); 816 } 817 } 818 spin_unlock_irqrestore(&opl3->voice_lock, flags); 819 } 820 821 /* 822 * Deal with a controller type event. This includes all types of 823 * control events, not just the midi controllers 824 */ 825 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 826 { 827 struct snd_opl3 *opl3; 828 829 opl3 = p; 830 #ifdef DEBUG_MIDI 831 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 832 type, chan->number, chan->midi_program); 833 #endif 834 835 switch (type) { 836 case MIDI_CTL_MSB_MODWHEEL: 837 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 838 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 839 else 840 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 841 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 842 opl3->drum_reg); 843 break; 844 case MIDI_CTL_E2_TREMOLO_DEPTH: 845 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 846 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 847 else 848 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 849 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 850 opl3->drum_reg); 851 break; 852 case MIDI_CTL_PITCHBEND: 853 snd_opl3_pitch_ctrl(opl3, chan); 854 break; 855 } 856 } 857 858 /* 859 * NRPN events 860 */ 861 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 862 struct snd_midi_channel_set *chset) 863 { 864 struct snd_opl3 *opl3; 865 866 opl3 = p; 867 #ifdef DEBUG_MIDI 868 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", 869 chan->number, chan->midi_program); 870 #endif 871 } 872 873 /* 874 * receive sysex 875 */ 876 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 877 int parsed, struct snd_midi_channel_set *chset) 878 { 879 struct snd_opl3 *opl3; 880 881 opl3 = p; 882 #ifdef DEBUG_MIDI 883 snd_printk(KERN_DEBUG "SYSEX\n"); 884 #endif 885 } 886