1 /* 2 * Midi synth routines for the Emu8k/Emu10k1 3 * 4 * Copyright (C) 1999 Steve Ratcliffe 5 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de> 6 * 7 * Contains code based on awe_wave.c by Takashi Iwai 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (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 */ 24 25 #include "emux_voice.h" 26 #include <sound/asoundef.h> 27 28 /* 29 * Prototypes 30 */ 31 32 /* 33 * Ensure a value is between two points 34 * macro evaluates its args more than once, so changed to upper-case. 35 */ 36 #define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0) 37 #define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0) 38 39 static int get_zone(struct snd_emux *emu, struct snd_emux_port *port, 40 int *notep, int vel, struct snd_midi_channel *chan, 41 struct snd_sf_zone **table); 42 static int get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan); 43 static void terminate_note1(struct snd_emux *emu, int note, 44 struct snd_midi_channel *chan, int free); 45 static void exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port, 46 int exclass); 47 static void terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free); 48 static void update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update); 49 static void setup_voice(struct snd_emux_voice *vp); 50 static int calc_pan(struct snd_emux_voice *vp); 51 static int calc_volume(struct snd_emux_voice *vp); 52 static int calc_pitch(struct snd_emux_voice *vp); 53 54 55 /* 56 * Start a note. 57 */ 58 void 59 snd_emux_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 60 { 61 struct snd_emux *emu; 62 int i, key, nvoices; 63 struct snd_emux_voice *vp; 64 struct snd_sf_zone *table[SNDRV_EMUX_MAX_MULTI_VOICES]; 65 unsigned long flags; 66 struct snd_emux_port *port; 67 68 port = p; 69 if (snd_BUG_ON(!port || !chan)) 70 return; 71 72 emu = port->emu; 73 if (snd_BUG_ON(!emu || !emu->ops.get_voice || !emu->ops.trigger)) 74 return; 75 76 key = note; /* remember the original note */ 77 nvoices = get_zone(emu, port, ¬e, vel, chan, table); 78 if (! nvoices) 79 return; 80 81 /* exclusive note off */ 82 for (i = 0; i < nvoices; i++) { 83 struct snd_sf_zone *zp = table[i]; 84 if (zp && zp->v.exclusiveClass) 85 exclusive_note_off(emu, port, zp->v.exclusiveClass); 86 } 87 88 #if 0 // seems not necessary 89 /* Turn off the same note on the same channel. */ 90 terminate_note1(emu, key, chan, 0); 91 #endif 92 93 spin_lock_irqsave(&emu->voice_lock, flags); 94 for (i = 0; i < nvoices; i++) { 95 96 /* set up each voice parameter */ 97 /* at this stage, we don't trigger the voice yet. */ 98 99 if (table[i] == NULL) 100 continue; 101 102 vp = emu->ops.get_voice(emu, port); 103 if (vp == NULL || vp->ch < 0) 104 continue; 105 if (STATE_IS_PLAYING(vp->state)) 106 emu->ops.terminate(vp); 107 108 vp->time = emu->use_time++; 109 vp->chan = chan; 110 vp->port = port; 111 vp->key = key; 112 vp->note = note; 113 vp->velocity = vel; 114 vp->zone = table[i]; 115 if (vp->zone->sample) 116 vp->block = vp->zone->sample->block; 117 else 118 vp->block = NULL; 119 120 setup_voice(vp); 121 122 vp->state = SNDRV_EMUX_ST_STANDBY; 123 if (emu->ops.prepare) { 124 vp->state = SNDRV_EMUX_ST_OFF; 125 if (emu->ops.prepare(vp) >= 0) 126 vp->state = SNDRV_EMUX_ST_STANDBY; 127 } 128 } 129 130 /* start envelope now */ 131 for (i = 0; i < emu->max_voices; i++) { 132 vp = &emu->voices[i]; 133 if (vp->state == SNDRV_EMUX_ST_STANDBY && 134 vp->chan == chan) { 135 emu->ops.trigger(vp); 136 vp->state = SNDRV_EMUX_ST_ON; 137 vp->ontime = jiffies; /* remember the trigger timing */ 138 } 139 } 140 spin_unlock_irqrestore(&emu->voice_lock, flags); 141 142 #ifdef SNDRV_EMUX_USE_RAW_EFFECT 143 if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) { 144 /* clear voice position for the next note on this channel */ 145 struct snd_emux_effect_table *fx = chan->private; 146 if (fx) { 147 fx->flag[EMUX_FX_SAMPLE_START] = 0; 148 fx->flag[EMUX_FX_COARSE_SAMPLE_START] = 0; 149 } 150 } 151 #endif 152 } 153 154 /* 155 * Release a note in response to a midi note off. 156 */ 157 void 158 snd_emux_note_off(void *p, int note, int vel, struct snd_midi_channel *chan) 159 { 160 int ch; 161 struct snd_emux *emu; 162 struct snd_emux_voice *vp; 163 unsigned long flags; 164 struct snd_emux_port *port; 165 166 port = p; 167 if (snd_BUG_ON(!port || !chan)) 168 return; 169 170 emu = port->emu; 171 if (snd_BUG_ON(!emu || !emu->ops.release)) 172 return; 173 174 spin_lock_irqsave(&emu->voice_lock, flags); 175 for (ch = 0; ch < emu->max_voices; ch++) { 176 vp = &emu->voices[ch]; 177 if (STATE_IS_PLAYING(vp->state) && 178 vp->chan == chan && vp->key == note) { 179 vp->state = SNDRV_EMUX_ST_RELEASED; 180 if (vp->ontime == jiffies) { 181 /* if note-off is sent too shortly after 182 * note-on, emuX engine cannot produce the sound 183 * correctly. so we'll release this note 184 * a bit later via timer callback. 185 */ 186 vp->state = SNDRV_EMUX_ST_PENDING; 187 if (! emu->timer_active) { 188 emu->tlist.expires = jiffies + 1; 189 add_timer(&emu->tlist); 190 emu->timer_active = 1; 191 } 192 } else 193 /* ok now release the note */ 194 emu->ops.release(vp); 195 } 196 } 197 spin_unlock_irqrestore(&emu->voice_lock, flags); 198 } 199 200 /* 201 * timer callback 202 * 203 * release the pending note-offs 204 */ 205 void snd_emux_timer_callback(unsigned long data) 206 { 207 struct snd_emux *emu = (struct snd_emux *) data; 208 struct snd_emux_voice *vp; 209 unsigned long flags; 210 int ch, do_again = 0; 211 212 spin_lock_irqsave(&emu->voice_lock, flags); 213 for (ch = 0; ch < emu->max_voices; ch++) { 214 vp = &emu->voices[ch]; 215 if (vp->state == SNDRV_EMUX_ST_PENDING) { 216 if (vp->ontime == jiffies) 217 do_again++; /* release this at the next interrupt */ 218 else { 219 emu->ops.release(vp); 220 vp->state = SNDRV_EMUX_ST_RELEASED; 221 } 222 } 223 } 224 if (do_again) { 225 emu->tlist.expires = jiffies + 1; 226 add_timer(&emu->tlist); 227 emu->timer_active = 1; 228 } else 229 emu->timer_active = 0; 230 spin_unlock_irqrestore(&emu->voice_lock, flags); 231 } 232 233 /* 234 * key pressure change 235 */ 236 void 237 snd_emux_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 238 { 239 int ch; 240 struct snd_emux *emu; 241 struct snd_emux_voice *vp; 242 unsigned long flags; 243 struct snd_emux_port *port; 244 245 port = p; 246 if (snd_BUG_ON(!port || !chan)) 247 return; 248 249 emu = port->emu; 250 if (snd_BUG_ON(!emu || !emu->ops.update)) 251 return; 252 253 spin_lock_irqsave(&emu->voice_lock, flags); 254 for (ch = 0; ch < emu->max_voices; ch++) { 255 vp = &emu->voices[ch]; 256 if (vp->state == SNDRV_EMUX_ST_ON && 257 vp->chan == chan && vp->key == note) { 258 vp->velocity = vel; 259 update_voice(emu, vp, SNDRV_EMUX_UPDATE_VOLUME); 260 } 261 } 262 spin_unlock_irqrestore(&emu->voice_lock, flags); 263 } 264 265 266 /* 267 * Modulate the voices which belong to the channel 268 */ 269 void 270 snd_emux_update_channel(struct snd_emux_port *port, struct snd_midi_channel *chan, int update) 271 { 272 struct snd_emux *emu; 273 struct snd_emux_voice *vp; 274 int i; 275 unsigned long flags; 276 277 if (! update) 278 return; 279 280 emu = port->emu; 281 if (snd_BUG_ON(!emu || !emu->ops.update)) 282 return; 283 284 spin_lock_irqsave(&emu->voice_lock, flags); 285 for (i = 0; i < emu->max_voices; i++) { 286 vp = &emu->voices[i]; 287 if (vp->chan == chan) 288 update_voice(emu, vp, update); 289 } 290 spin_unlock_irqrestore(&emu->voice_lock, flags); 291 } 292 293 /* 294 * Modulate all the voices which belong to the port. 295 */ 296 void 297 snd_emux_update_port(struct snd_emux_port *port, int update) 298 { 299 struct snd_emux *emu; 300 struct snd_emux_voice *vp; 301 int i; 302 unsigned long flags; 303 304 if (! update) 305 return; 306 307 emu = port->emu; 308 if (snd_BUG_ON(!emu || !emu->ops.update)) 309 return; 310 311 spin_lock_irqsave(&emu->voice_lock, flags); 312 for (i = 0; i < emu->max_voices; i++) { 313 vp = &emu->voices[i]; 314 if (vp->port == port) 315 update_voice(emu, vp, update); 316 } 317 spin_unlock_irqrestore(&emu->voice_lock, flags); 318 } 319 320 321 /* 322 * Deal with a controller type event. This includes all types of 323 * control events, not just the midi controllers 324 */ 325 void 326 snd_emux_control(void *p, int type, struct snd_midi_channel *chan) 327 { 328 struct snd_emux_port *port; 329 330 port = p; 331 if (snd_BUG_ON(!port || !chan)) 332 return; 333 334 switch (type) { 335 case MIDI_CTL_MSB_MAIN_VOLUME: 336 case MIDI_CTL_MSB_EXPRESSION: 337 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_VOLUME); 338 break; 339 340 case MIDI_CTL_MSB_PAN: 341 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN); 342 break; 343 344 case MIDI_CTL_SOFT_PEDAL: 345 #ifdef SNDRV_EMUX_USE_RAW_EFFECT 346 /* FIXME: this is an emulation */ 347 if (chan->control[type] >= 64) 348 snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160, 349 EMUX_FX_FLAG_ADD); 350 else 351 snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0, 352 EMUX_FX_FLAG_OFF); 353 #endif 354 break; 355 356 case MIDI_CTL_PITCHBEND: 357 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PITCH); 358 break; 359 360 case MIDI_CTL_MSB_MODWHEEL: 361 case MIDI_CTL_CHAN_PRESSURE: 362 snd_emux_update_channel(port, chan, 363 SNDRV_EMUX_UPDATE_FMMOD | 364 SNDRV_EMUX_UPDATE_FM2FRQ2); 365 break; 366 367 } 368 369 if (port->chset.midi_mode == SNDRV_MIDI_MODE_XG) { 370 snd_emux_xg_control(port, chan, type); 371 } 372 } 373 374 375 /* 376 * terminate note - if free flag is true, free the terminated voice 377 */ 378 static void 379 terminate_note1(struct snd_emux *emu, int note, struct snd_midi_channel *chan, int free) 380 { 381 int i; 382 struct snd_emux_voice *vp; 383 unsigned long flags; 384 385 spin_lock_irqsave(&emu->voice_lock, flags); 386 for (i = 0; i < emu->max_voices; i++) { 387 vp = &emu->voices[i]; 388 if (STATE_IS_PLAYING(vp->state) && vp->chan == chan && 389 vp->key == note) 390 terminate_voice(emu, vp, free); 391 } 392 spin_unlock_irqrestore(&emu->voice_lock, flags); 393 } 394 395 396 /* 397 * terminate note - exported for midi emulation 398 */ 399 void 400 snd_emux_terminate_note(void *p, int note, struct snd_midi_channel *chan) 401 { 402 struct snd_emux *emu; 403 struct snd_emux_port *port; 404 405 port = p; 406 if (snd_BUG_ON(!port || !chan)) 407 return; 408 409 emu = port->emu; 410 if (snd_BUG_ON(!emu || !emu->ops.terminate)) 411 return; 412 413 terminate_note1(emu, note, chan, 1); 414 } 415 416 417 /* 418 * Terminate all the notes 419 */ 420 void 421 snd_emux_terminate_all(struct snd_emux *emu) 422 { 423 int i; 424 struct snd_emux_voice *vp; 425 unsigned long flags; 426 427 spin_lock_irqsave(&emu->voice_lock, flags); 428 for (i = 0; i < emu->max_voices; i++) { 429 vp = &emu->voices[i]; 430 if (STATE_IS_PLAYING(vp->state)) 431 terminate_voice(emu, vp, 0); 432 if (vp->state == SNDRV_EMUX_ST_OFF) { 433 if (emu->ops.free_voice) 434 emu->ops.free_voice(vp); 435 if (emu->ops.reset) 436 emu->ops.reset(emu, i); 437 } 438 vp->time = 0; 439 } 440 /* initialize allocation time */ 441 emu->use_time = 0; 442 spin_unlock_irqrestore(&emu->voice_lock, flags); 443 } 444 445 EXPORT_SYMBOL(snd_emux_terminate_all); 446 447 /* 448 * Terminate all voices associated with the given port 449 */ 450 void 451 snd_emux_sounds_off_all(struct snd_emux_port *port) 452 { 453 int i; 454 struct snd_emux *emu; 455 struct snd_emux_voice *vp; 456 unsigned long flags; 457 458 if (snd_BUG_ON(!port)) 459 return; 460 emu = port->emu; 461 if (snd_BUG_ON(!emu || !emu->ops.terminate)) 462 return; 463 464 spin_lock_irqsave(&emu->voice_lock, flags); 465 for (i = 0; i < emu->max_voices; i++) { 466 vp = &emu->voices[i]; 467 if (STATE_IS_PLAYING(vp->state) && 468 vp->port == port) 469 terminate_voice(emu, vp, 0); 470 if (vp->state == SNDRV_EMUX_ST_OFF) { 471 if (emu->ops.free_voice) 472 emu->ops.free_voice(vp); 473 if (emu->ops.reset) 474 emu->ops.reset(emu, i); 475 } 476 } 477 spin_unlock_irqrestore(&emu->voice_lock, flags); 478 } 479 480 481 /* 482 * Terminate all voices that have the same exclusive class. This 483 * is mainly for drums. 484 */ 485 static void 486 exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port, int exclass) 487 { 488 struct snd_emux_voice *vp; 489 int i; 490 unsigned long flags; 491 492 spin_lock_irqsave(&emu->voice_lock, flags); 493 for (i = 0; i < emu->max_voices; i++) { 494 vp = &emu->voices[i]; 495 if (STATE_IS_PLAYING(vp->state) && vp->port == port && 496 vp->reg.exclusiveClass == exclass) { 497 terminate_voice(emu, vp, 0); 498 } 499 } 500 spin_unlock_irqrestore(&emu->voice_lock, flags); 501 } 502 503 /* 504 * terminate a voice 505 * if free flag is true, call free_voice after termination 506 */ 507 static void 508 terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free) 509 { 510 emu->ops.terminate(vp); 511 vp->time = emu->use_time++; 512 vp->chan = NULL; 513 vp->port = NULL; 514 vp->zone = NULL; 515 vp->block = NULL; 516 vp->state = SNDRV_EMUX_ST_OFF; 517 if (free && emu->ops.free_voice) 518 emu->ops.free_voice(vp); 519 } 520 521 522 /* 523 * Modulate the voice 524 */ 525 static void 526 update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update) 527 { 528 if (!STATE_IS_PLAYING(vp->state)) 529 return; 530 531 if (vp->chan == NULL || vp->port == NULL) 532 return; 533 if (update & SNDRV_EMUX_UPDATE_VOLUME) 534 calc_volume(vp); 535 if (update & SNDRV_EMUX_UPDATE_PITCH) 536 calc_pitch(vp); 537 if (update & SNDRV_EMUX_UPDATE_PAN) { 538 if (! calc_pan(vp) && (update == SNDRV_EMUX_UPDATE_PAN)) 539 return; 540 } 541 emu->ops.update(vp, update); 542 } 543 544 545 #if 0 // not used 546 /* table for volume target calculation */ 547 static unsigned short voltarget[16] = { 548 0xEAC0, 0xE0C8, 0xD740, 0xCE20, 0xC560, 0xBD08, 0xB500, 0xAD58, 549 0xA5F8, 0x9EF0, 0x9830, 0x91C0, 0x8B90, 0x85A8, 0x8000, 0x7A90 550 }; 551 #endif 552 553 #define LO_BYTE(v) ((v) & 0xff) 554 #define HI_BYTE(v) (((v) >> 8) & 0xff) 555 556 /* 557 * Sets up the voice structure by calculating some values that 558 * will be needed later. 559 */ 560 static void 561 setup_voice(struct snd_emux_voice *vp) 562 { 563 struct soundfont_voice_parm *parm; 564 int pitch; 565 566 /* copy the original register values */ 567 vp->reg = vp->zone->v; 568 569 #ifdef SNDRV_EMUX_USE_RAW_EFFECT 570 snd_emux_setup_effect(vp); 571 #endif 572 573 /* reset status */ 574 vp->apan = -1; 575 vp->avol = -1; 576 vp->apitch = -1; 577 578 calc_volume(vp); 579 calc_pitch(vp); 580 calc_pan(vp); 581 582 parm = &vp->reg.parm; 583 584 /* compute filter target and correct modulation parameters */ 585 if (LO_BYTE(parm->modatkhld) >= 0x80 && parm->moddelay >= 0x8000) { 586 parm->moddelay = 0xbfff; 587 pitch = (HI_BYTE(parm->pefe) << 4) + vp->apitch; 588 if (pitch > 0xffff) 589 pitch = 0xffff; 590 /* calculate filter target */ 591 vp->ftarget = parm->cutoff + LO_BYTE(parm->pefe); 592 LIMITVALUE(vp->ftarget, 0, 255); 593 vp->ftarget <<= 8; 594 } else { 595 vp->ftarget = parm->cutoff; 596 vp->ftarget <<= 8; 597 pitch = vp->apitch; 598 } 599 600 /* compute pitch target */ 601 if (pitch != 0xffff) { 602 vp->ptarget = 1 << (pitch >> 12); 603 if (pitch & 0x800) vp->ptarget += (vp->ptarget*0x102e)/0x2710; 604 if (pitch & 0x400) vp->ptarget += (vp->ptarget*0x764)/0x2710; 605 if (pitch & 0x200) vp->ptarget += (vp->ptarget*0x389)/0x2710; 606 vp->ptarget += (vp->ptarget >> 1); 607 if (vp->ptarget > 0xffff) vp->ptarget = 0xffff; 608 } else 609 vp->ptarget = 0xffff; 610 611 if (LO_BYTE(parm->modatkhld) >= 0x80) { 612 parm->modatkhld &= ~0xff; 613 parm->modatkhld |= 0x7f; 614 } 615 616 /* compute volume target and correct volume parameters */ 617 vp->vtarget = 0; 618 #if 0 /* FIXME: this leads to some clicks.. */ 619 if (LO_BYTE(parm->volatkhld) >= 0x80 && parm->voldelay >= 0x8000) { 620 parm->voldelay = 0xbfff; 621 vp->vtarget = voltarget[vp->avol % 0x10] >> (vp->avol >> 4); 622 } 623 #endif 624 625 if (LO_BYTE(parm->volatkhld) >= 0x80) { 626 parm->volatkhld &= ~0xff; 627 parm->volatkhld |= 0x7f; 628 } 629 } 630 631 /* 632 * calculate pitch parameter 633 */ 634 static unsigned char pan_volumes[256] = { 635 0x00,0x03,0x06,0x09,0x0c,0x0f,0x12,0x14,0x17,0x1a,0x1d,0x20,0x22,0x25,0x28,0x2a, 636 0x2d,0x30,0x32,0x35,0x37,0x3a,0x3c,0x3f,0x41,0x44,0x46,0x49,0x4b,0x4d,0x50,0x52, 637 0x54,0x57,0x59,0x5b,0x5d,0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6f,0x71,0x73,0x75, 638 0x77,0x79,0x7b,0x7c,0x7e,0x80,0x82,0x84,0x86,0x88,0x89,0x8b,0x8d,0x8f,0x90,0x92, 639 0x94,0x96,0x97,0x99,0x9a,0x9c,0x9e,0x9f,0xa1,0xa2,0xa4,0xa5,0xa7,0xa8,0xaa,0xab, 640 0xad,0xae,0xaf,0xb1,0xb2,0xb3,0xb5,0xb6,0xb7,0xb9,0xba,0xbb,0xbc,0xbe,0xbf,0xc0, 641 0xc1,0xc2,0xc3,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1, 642 0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdc,0xdd,0xde,0xdf, 643 0xdf,0xe0,0xe1,0xe2,0xe2,0xe3,0xe4,0xe4,0xe5,0xe6,0xe6,0xe7,0xe8,0xe8,0xe9,0xe9, 644 0xea,0xeb,0xeb,0xec,0xec,0xed,0xed,0xee,0xee,0xef,0xef,0xf0,0xf0,0xf1,0xf1,0xf1, 645 0xf2,0xf2,0xf3,0xf3,0xf3,0xf4,0xf4,0xf5,0xf5,0xf5,0xf6,0xf6,0xf6,0xf7,0xf7,0xf7, 646 0xf7,0xf8,0xf8,0xf8,0xf9,0xf9,0xf9,0xf9,0xf9,0xfa,0xfa,0xfa,0xfa,0xfb,0xfb,0xfb, 647 0xfb,0xfb,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd, 648 0xfd,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe, 649 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 650 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 651 }; 652 653 static int 654 calc_pan(struct snd_emux_voice *vp) 655 { 656 struct snd_midi_channel *chan = vp->chan; 657 int pan; 658 659 /* pan & loop start (pan 8bit, MSB, 0:right, 0xff:left) */ 660 if (vp->reg.fixpan > 0) /* 0-127 */ 661 pan = 255 - (int)vp->reg.fixpan * 2; 662 else { 663 pan = chan->control[MIDI_CTL_MSB_PAN] - 64; 664 if (vp->reg.pan >= 0) /* 0-127 */ 665 pan += vp->reg.pan - 64; 666 pan = 127 - (int)pan * 2; 667 } 668 LIMITVALUE(pan, 0, 255); 669 670 if (vp->emu->linear_panning) { 671 /* assuming linear volume */ 672 if (pan != vp->apan) { 673 vp->apan = pan; 674 if (pan == 0) 675 vp->aaux = 0xff; 676 else 677 vp->aaux = (-pan) & 0xff; 678 return 1; 679 } else 680 return 0; 681 } else { 682 /* using volume table */ 683 if (vp->apan != (int)pan_volumes[pan]) { 684 vp->apan = pan_volumes[pan]; 685 vp->aaux = pan_volumes[255 - pan]; 686 return 1; 687 } 688 return 0; 689 } 690 } 691 692 693 /* 694 * calculate volume attenuation 695 * 696 * Voice volume is controlled by volume attenuation parameter. 697 * So volume becomes maximum when avol is 0 (no attenuation), and 698 * minimum when 255 (-96dB or silence). 699 */ 700 701 /* tables for volume->attenuation calculation */ 702 static unsigned char voltab1[128] = { 703 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 704 0x63, 0x2b, 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 705 0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a, 706 0x19, 0x19, 0x18, 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x14, 707 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10, 708 0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0e, 0x0d, 709 0x0d, 0x0d, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b, 710 0x0b, 0x0a, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09, 711 0x08, 0x08, 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06, 712 0x06, 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x04, 713 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02, 714 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 715 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 716 }; 717 718 static unsigned char voltab2[128] = { 719 0x32, 0x31, 0x30, 0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x2a, 720 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x24, 0x23, 0x22, 0x21, 721 0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1c, 0x1b, 0x1a, 722 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17, 0x16, 0x16, 0x15, 0x15, 723 0x14, 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x10, 724 0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d, 725 0x0d, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b, 0x0b, 0x0a, 0x0a, 726 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09, 0x08, 0x08, 0x08, 727 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06, 728 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 729 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 730 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 731 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 732 }; 733 734 static unsigned char expressiontab[128] = { 735 0x7f, 0x6c, 0x62, 0x5a, 0x54, 0x50, 0x4b, 0x48, 0x45, 0x42, 736 0x40, 0x3d, 0x3b, 0x39, 0x38, 0x36, 0x34, 0x33, 0x31, 0x30, 737 0x2f, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, 0x27, 0x26, 0x25, 738 0x24, 0x24, 0x23, 0x22, 0x21, 0x21, 0x20, 0x1f, 0x1e, 0x1e, 739 0x1d, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a, 0x1a, 0x19, 0x18, 0x18, 740 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x15, 0x14, 0x14, 0x13, 741 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10, 0x10, 0x0f, 0x0f, 742 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d, 0x0d, 0x0c, 0x0c, 0x0c, 743 0x0b, 0x0b, 0x0b, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 744 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06, 745 0x06, 0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 746 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 747 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 748 }; 749 750 /* 751 * Magic to calculate the volume (actually attenuation) from all the 752 * voice and channels parameters. 753 */ 754 static int 755 calc_volume(struct snd_emux_voice *vp) 756 { 757 int vol; 758 int main_vol, expression_vol, master_vol; 759 struct snd_midi_channel *chan = vp->chan; 760 struct snd_emux_port *port = vp->port; 761 762 expression_vol = chan->control[MIDI_CTL_MSB_EXPRESSION]; 763 LIMITMAX(vp->velocity, 127); 764 LIMITVALUE(expression_vol, 0, 127); 765 if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) { 766 /* 0 - 127 */ 767 main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME]; 768 vol = (vp->velocity * main_vol * expression_vol) / (127*127); 769 vol = vol * vp->reg.amplitude / 127; 770 771 LIMITVALUE(vol, 0, 127); 772 773 /* calc to attenuation */ 774 vol = snd_sf_vol_table[vol]; 775 776 } else { 777 main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME] * vp->reg.amplitude / 127; 778 LIMITVALUE(main_vol, 0, 127); 779 780 vol = voltab1[main_vol] + voltab2[vp->velocity]; 781 vol = (vol * 8) / 3; 782 vol += vp->reg.attenuation; 783 vol += ((0x100 - vol) * expressiontab[expression_vol])/128; 784 } 785 786 master_vol = port->chset.gs_master_volume; 787 LIMITVALUE(master_vol, 0, 127); 788 vol += snd_sf_vol_table[master_vol]; 789 vol += port->volume_atten; 790 791 #ifdef SNDRV_EMUX_USE_RAW_EFFECT 792 if (chan->private) { 793 struct snd_emux_effect_table *fx = chan->private; 794 vol += fx->val[EMUX_FX_ATTEN]; 795 } 796 #endif 797 798 LIMITVALUE(vol, 0, 255); 799 if (vp->avol == vol) 800 return 0; /* value unchanged */ 801 802 vp->avol = vol; 803 if (!SF_IS_DRUM_BANK(get_bank(port, chan)) 804 && LO_BYTE(vp->reg.parm.volatkhld) < 0x7d) { 805 int atten; 806 if (vp->velocity < 70) 807 atten = 70; 808 else 809 atten = vp->velocity; 810 vp->acutoff = (atten * vp->reg.parm.cutoff + 0xa0) >> 7; 811 } else { 812 vp->acutoff = vp->reg.parm.cutoff; 813 } 814 815 return 1; /* value changed */ 816 } 817 818 /* 819 * calculate pitch offset 820 * 821 * 0xE000 is no pitch offset at 44100Hz sample. 822 * Every 4096 is one octave. 823 */ 824 825 static int 826 calc_pitch(struct snd_emux_voice *vp) 827 { 828 struct snd_midi_channel *chan = vp->chan; 829 int offset; 830 831 /* calculate offset */ 832 if (vp->reg.fixkey >= 0) { 833 offset = (vp->reg.fixkey - vp->reg.root) * 4096 / 12; 834 } else { 835 offset = (vp->note - vp->reg.root) * 4096 / 12; 836 } 837 offset = (offset * vp->reg.scaleTuning) / 100; 838 offset += vp->reg.tune * 4096 / 1200; 839 if (chan->midi_pitchbend != 0) { 840 /* (128 * 8192: 1 semitone) ==> (4096: 12 semitones) */ 841 offset += chan->midi_pitchbend * chan->gm_rpn_pitch_bend_range / 3072; 842 } 843 844 /* tuning via RPN: 845 * coarse = -8192 to 8192 (100 cent per 128) 846 * fine = -8192 to 8192 (max=100cent) 847 */ 848 /* 4096 = 1200 cents in emu8000 parameter */ 849 offset += chan->gm_rpn_coarse_tuning * 4096 / (12 * 128); 850 offset += chan->gm_rpn_fine_tuning / 24; 851 852 #ifdef SNDRV_EMUX_USE_RAW_EFFECT 853 /* add initial pitch correction */ 854 if (chan->private) { 855 struct snd_emux_effect_table *fx = chan->private; 856 if (fx->flag[EMUX_FX_INIT_PITCH]) 857 offset += fx->val[EMUX_FX_INIT_PITCH]; 858 } 859 #endif 860 861 /* 0xe000: root pitch */ 862 offset += 0xe000 + vp->reg.rate_offset; 863 offset += vp->emu->pitch_shift; 864 LIMITVALUE(offset, 0, 0xffff); 865 if (offset == vp->apitch) 866 return 0; /* unchanged */ 867 vp->apitch = offset; 868 return 1; /* value changed */ 869 } 870 871 /* 872 * Get the bank number assigned to the channel 873 */ 874 static int 875 get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan) 876 { 877 int val; 878 879 switch (port->chset.midi_mode) { 880 case SNDRV_MIDI_MODE_XG: 881 val = chan->control[MIDI_CTL_MSB_BANK]; 882 if (val == 127) 883 return 128; /* return drum bank */ 884 return chan->control[MIDI_CTL_LSB_BANK]; 885 886 case SNDRV_MIDI_MODE_GS: 887 if (chan->drum_channel) 888 return 128; 889 /* ignore LSB (bank map) */ 890 return chan->control[MIDI_CTL_MSB_BANK]; 891 892 default: 893 if (chan->drum_channel) 894 return 128; 895 return chan->control[MIDI_CTL_MSB_BANK]; 896 } 897 } 898 899 900 /* Look for the zones matching with the given note and velocity. 901 * The resultant zones are stored on table. 902 */ 903 static int 904 get_zone(struct snd_emux *emu, struct snd_emux_port *port, 905 int *notep, int vel, struct snd_midi_channel *chan, 906 struct snd_sf_zone **table) 907 { 908 int preset, bank, def_preset, def_bank; 909 910 bank = get_bank(port, chan); 911 preset = chan->midi_program; 912 913 if (SF_IS_DRUM_BANK(bank)) { 914 def_preset = port->ctrls[EMUX_MD_DEF_DRUM]; 915 def_bank = bank; 916 } else { 917 def_preset = preset; 918 def_bank = port->ctrls[EMUX_MD_DEF_BANK]; 919 } 920 921 return snd_soundfont_search_zone(emu->sflist, notep, vel, preset, bank, 922 def_preset, def_bank, 923 table, SNDRV_EMUX_MAX_MULTI_VOICES); 924 } 925 926 /* 927 */ 928 void 929 snd_emux_init_voices(struct snd_emux *emu) 930 { 931 struct snd_emux_voice *vp; 932 int i; 933 unsigned long flags; 934 935 spin_lock_irqsave(&emu->voice_lock, flags); 936 for (i = 0; i < emu->max_voices; i++) { 937 vp = &emu->voices[i]; 938 vp->ch = -1; /* not used */ 939 vp->state = SNDRV_EMUX_ST_OFF; 940 vp->chan = NULL; 941 vp->port = NULL; 942 vp->time = 0; 943 vp->emu = emu; 944 vp->hw = emu->hw; 945 } 946 spin_unlock_irqrestore(&emu->voice_lock, flags); 947 } 948 949 /* 950 */ 951 void snd_emux_lock_voice(struct snd_emux *emu, int voice) 952 { 953 unsigned long flags; 954 955 spin_lock_irqsave(&emu->voice_lock, flags); 956 if (emu->voices[voice].state == SNDRV_EMUX_ST_OFF) 957 emu->voices[voice].state = SNDRV_EMUX_ST_LOCKED; 958 else 959 snd_printk(KERN_WARNING 960 "invalid voice for lock %d (state = %x)\n", 961 voice, emu->voices[voice].state); 962 spin_unlock_irqrestore(&emu->voice_lock, flags); 963 } 964 965 EXPORT_SYMBOL(snd_emux_lock_voice); 966 967 /* 968 */ 969 void snd_emux_unlock_voice(struct snd_emux *emu, int voice) 970 { 971 unsigned long flags; 972 973 spin_lock_irqsave(&emu->voice_lock, flags); 974 if (emu->voices[voice].state == SNDRV_EMUX_ST_LOCKED) 975 emu->voices[voice].state = SNDRV_EMUX_ST_OFF; 976 else 977 snd_printk(KERN_WARNING 978 "invalid voice for unlock %d (state = %x)\n", 979 voice, emu->voices[voice].state); 980 spin_unlock_irqrestore(&emu->voice_lock, flags); 981 } 982 983 EXPORT_SYMBOL(snd_emux_unlock_voice); 984