Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |