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Commit | Line | Data |
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1da177e4 LT |
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 | ||
03da312a TI |
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); | |
1da177e4 LT |
53 | |
54 | ||
55 | /* | |
56 | * Start a note. | |
57 | */ | |
58 | void | |
03da312a | 59 | snd_emux_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 60 | { |
03da312a | 61 | struct snd_emux *emu; |
1da177e4 | 62 | int i, key, nvoices; |
03da312a TI |
63 | struct snd_emux_voice *vp; |
64 | struct snd_sf_zone *table[SNDRV_EMUX_MAX_MULTI_VOICES]; | |
1da177e4 | 65 | unsigned long flags; |
03da312a | 66 | struct snd_emux_port *port; |
1da177e4 LT |
67 | |
68 | port = p; | |
5e246b85 TI |
69 | if (snd_BUG_ON(!port || !chan)) |
70 | return; | |
1da177e4 LT |
71 | |
72 | emu = port->emu; | |
5e246b85 TI |
73 | if (snd_BUG_ON(!emu || !emu->ops.get_voice || !emu->ops.trigger)) |
74 | return; | |
1da177e4 LT |
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++) { | |
03da312a | 83 | struct snd_sf_zone *zp = table[i]; |
1da177e4 LT |
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; | |
1da177e4 LT |
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 */ | |
03da312a | 145 | struct snd_emux_effect_table *fx = chan->private; |
1da177e4 LT |
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 | |
03da312a | 158 | snd_emux_note_off(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 LT |
159 | { |
160 | int ch; | |
03da312a TI |
161 | struct snd_emux *emu; |
162 | struct snd_emux_voice *vp; | |
1da177e4 | 163 | unsigned long flags; |
03da312a | 164 | struct snd_emux_port *port; |
1da177e4 LT |
165 | |
166 | port = p; | |
5e246b85 TI |
167 | if (snd_BUG_ON(!port || !chan)) |
168 | return; | |
1da177e4 LT |
169 | |
170 | emu = port->emu; | |
5e246b85 TI |
171 | if (snd_BUG_ON(!emu || !emu->ops.release)) |
172 | return; | |
1da177e4 LT |
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) { | |
1da177e4 LT |
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 | { | |
03da312a TI |
207 | struct snd_emux *emu = (struct snd_emux *) data; |
208 | struct snd_emux_voice *vp; | |
b32425ac | 209 | unsigned long flags; |
1da177e4 LT |
210 | int ch, do_again = 0; |
211 | ||
b32425ac | 212 | spin_lock_irqsave(&emu->voice_lock, flags); |
1da177e4 LT |
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; | |
b32425ac | 230 | spin_unlock_irqrestore(&emu->voice_lock, flags); |
1da177e4 LT |
231 | } |
232 | ||
233 | /* | |
234 | * key pressure change | |
235 | */ | |
236 | void | |
03da312a | 237 | snd_emux_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 LT |
238 | { |
239 | int ch; | |
03da312a TI |
240 | struct snd_emux *emu; |
241 | struct snd_emux_voice *vp; | |
1da177e4 | 242 | unsigned long flags; |
03da312a | 243 | struct snd_emux_port *port; |
1da177e4 LT |
244 | |
245 | port = p; | |
5e246b85 TI |
246 | if (snd_BUG_ON(!port || !chan)) |
247 | return; | |
1da177e4 LT |
248 | |
249 | emu = port->emu; | |
5e246b85 TI |
250 | if (snd_BUG_ON(!emu || !emu->ops.update)) |
251 | return; | |
1da177e4 LT |
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 | |
03da312a | 270 | snd_emux_update_channel(struct snd_emux_port *port, struct snd_midi_channel *chan, int update) |
1da177e4 | 271 | { |
03da312a TI |
272 | struct snd_emux *emu; |
273 | struct snd_emux_voice *vp; | |
1da177e4 LT |
274 | int i; |
275 | unsigned long flags; | |
276 | ||
277 | if (! update) | |
278 | return; | |
279 | ||
280 | emu = port->emu; | |
5e246b85 TI |
281 | if (snd_BUG_ON(!emu || !emu->ops.update)) |
282 | return; | |
1da177e4 LT |
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 | |
03da312a | 297 | snd_emux_update_port(struct snd_emux_port *port, int update) |
1da177e4 | 298 | { |
03da312a TI |
299 | struct snd_emux *emu; |
300 | struct snd_emux_voice *vp; | |
1da177e4 LT |
301 | int i; |
302 | unsigned long flags; | |
303 | ||
304 | if (! update) | |
305 | return; | |
306 | ||
307 | emu = port->emu; | |
5e246b85 TI |
308 | if (snd_BUG_ON(!emu || !emu->ops.update)) |
309 | return; | |
1da177e4 LT |
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 | /* | |
3a4fa0a2 | 322 | * Deal with a controller type event. This includes all types of |
1da177e4 LT |
323 | * control events, not just the midi controllers |
324 | */ | |
325 | void | |
03da312a | 326 | snd_emux_control(void *p, int type, struct snd_midi_channel *chan) |
1da177e4 | 327 | { |
03da312a | 328 | struct snd_emux_port *port; |
1da177e4 LT |
329 | |
330 | port = p; | |
5e246b85 TI |
331 | if (snd_BUG_ON(!port || !chan)) |
332 | return; | |
1da177e4 LT |
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 */ | |
bf91141d | 347 | if (chan->control[type] >= 64) |
348 | snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160, | |
1da177e4 | 349 | EMUX_FX_FLAG_ADD); |
bf91141d | 350 | else |
351 | snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0, | |
352 | EMUX_FX_FLAG_OFF); | |
1da177e4 LT |
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 | |
03da312a | 379 | terminate_note1(struct snd_emux *emu, int note, struct snd_midi_channel *chan, int free) |
1da177e4 LT |
380 | { |
381 | int i; | |
03da312a | 382 | struct snd_emux_voice *vp; |
1da177e4 LT |
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 | |
03da312a | 400 | snd_emux_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
1da177e4 | 401 | { |
03da312a TI |
402 | struct snd_emux *emu; |
403 | struct snd_emux_port *port; | |
1da177e4 LT |
404 | |
405 | port = p; | |
5e246b85 TI |
406 | if (snd_BUG_ON(!port || !chan)) |
407 | return; | |
1da177e4 LT |
408 | |
409 | emu = port->emu; | |
5e246b85 TI |
410 | if (snd_BUG_ON(!emu || !emu->ops.terminate)) |
411 | return; | |
1da177e4 LT |
412 | |
413 | terminate_note1(emu, note, chan, 1); | |
414 | } | |
415 | ||
416 | ||
417 | /* | |
418 | * Terminate all the notes | |
419 | */ | |
420 | void | |
03da312a | 421 | snd_emux_terminate_all(struct snd_emux *emu) |
1da177e4 LT |
422 | { |
423 | int i; | |
03da312a | 424 | struct snd_emux_voice *vp; |
1da177e4 LT |
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 | ||
95ff1756 | 445 | EXPORT_SYMBOL(snd_emux_terminate_all); |
1da177e4 LT |
446 | |
447 | /* | |
448 | * Terminate all voices associated with the given port | |
449 | */ | |
450 | void | |
03da312a | 451 | snd_emux_sounds_off_all(struct snd_emux_port *port) |
1da177e4 LT |
452 | { |
453 | int i; | |
03da312a TI |
454 | struct snd_emux *emu; |
455 | struct snd_emux_voice *vp; | |
1da177e4 LT |
456 | unsigned long flags; |
457 | ||
5e246b85 TI |
458 | if (snd_BUG_ON(!port)) |
459 | return; | |
1da177e4 | 460 | emu = port->emu; |
5e246b85 TI |
461 | if (snd_BUG_ON(!emu || !emu->ops.terminate)) |
462 | return; | |
1da177e4 LT |
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 | |
03da312a | 486 | exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port, int exclass) |
1da177e4 | 487 | { |
03da312a | 488 | struct snd_emux_voice *vp; |
1da177e4 LT |
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 | |
03da312a | 508 | terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free) |
1da177e4 LT |
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 | |
03da312a | 526 | update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update) |
1da177e4 LT |
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 | |
03da312a | 561 | setup_voice(struct snd_emux_voice *vp) |
1da177e4 | 562 | { |
03da312a | 563 | struct soundfont_voice_parm *parm; |
1da177e4 LT |
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 | |
03da312a | 654 | calc_pan(struct snd_emux_voice *vp) |
1da177e4 | 655 | { |
03da312a | 656 | struct snd_midi_channel *chan = vp->chan; |
1da177e4 LT |
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 | |
03da312a | 755 | calc_volume(struct snd_emux_voice *vp) |
1da177e4 LT |
756 | { |
757 | int vol; | |
758 | int main_vol, expression_vol, master_vol; | |
03da312a TI |
759 | struct snd_midi_channel *chan = vp->chan; |
760 | struct snd_emux_port *port = vp->port; | |
1da177e4 LT |
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) { | |
03da312a | 793 | struct snd_emux_effect_table *fx = chan->private; |
1da177e4 LT |
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 | |
03da312a | 826 | calc_pitch(struct snd_emux_voice *vp) |
1da177e4 | 827 | { |
03da312a | 828 | struct snd_midi_channel *chan = vp->chan; |
1da177e4 LT |
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) { | |
03da312a | 855 | struct snd_emux_effect_table *fx = chan->private; |
1da177e4 LT |
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 | |
03da312a | 875 | get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan) |
1da177e4 LT |
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 | |
03da312a TI |
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) | |
1da177e4 LT |
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 | |
03da312a | 929 | snd_emux_init_voices(struct snd_emux *emu) |
1da177e4 | 930 | { |
03da312a | 931 | struct snd_emux_voice *vp; |
1da177e4 LT |
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 | */ | |
03da312a | 951 | void snd_emux_lock_voice(struct snd_emux *emu, int voice) |
1da177e4 LT |
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("invalid voice for lock %d (state = %x)\n", | |
960 | voice, emu->voices[voice].state); | |
961 | spin_unlock_irqrestore(&emu->voice_lock, flags); | |
962 | } | |
963 | ||
95ff1756 TI |
964 | EXPORT_SYMBOL(snd_emux_lock_voice); |
965 | ||
1da177e4 LT |
966 | /* |
967 | */ | |
03da312a | 968 | void snd_emux_unlock_voice(struct snd_emux *emu, int voice) |
1da177e4 LT |
969 | { |
970 | unsigned long flags; | |
971 | ||
972 | spin_lock_irqsave(&emu->voice_lock, flags); | |
973 | if (emu->voices[voice].state == SNDRV_EMUX_ST_LOCKED) | |
974 | emu->voices[voice].state = SNDRV_EMUX_ST_OFF; | |
975 | else | |
976 | snd_printk("invalid voice for unlock %d (state = %x)\n", | |
977 | voice, emu->voices[voice].state); | |
978 | spin_unlock_irqrestore(&emu->voice_lock, flags); | |
979 | } | |
95ff1756 TI |
980 | |
981 | EXPORT_SYMBOL(snd_emux_unlock_voice); |