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1da177e4 LT |
1 | /* |
2 | * GM/GS/XG midi module. | |
3 | * | |
4 | * Copyright (C) 1999 Steve Ratcliffe | |
5 | * | |
6 | * Based on awe_wave.c by Takashi Iwai | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | /* | |
24 | * This module is used to keep track of the current midi state. | |
25 | * It can be used for drivers that are required to emulate midi when | |
26 | * the hardware doesn't. | |
27 | * | |
28 | * It was written for a AWE64 driver, but there should be no AWE specific | |
29 | * code in here. If there is it should be reported as a bug. | |
30 | */ | |
31 | ||
1da177e4 LT |
32 | #include <linux/init.h> |
33 | #include <linux/slab.h> | |
34 | #include <linux/string.h> | |
35 | #include <sound/core.h> | |
36 | #include <sound/seq_kernel.h> | |
37 | #include <sound/seq_midi_emul.h> | |
38 | #include <sound/initval.h> | |
39 | #include <sound/asoundef.h> | |
40 | ||
41 | MODULE_AUTHOR("Takashi Iwai / Steve Ratcliffe"); | |
42 | MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI emulation."); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | /* Prototypes for static functions */ | |
c7e0b5bf TI |
46 | static void note_off(struct snd_midi_op *ops, void *drv, |
47 | struct snd_midi_channel *chan, | |
48 | int note, int vel); | |
49 | static void do_control(struct snd_midi_op *ops, void *private, | |
50 | struct snd_midi_channel_set *chset, | |
51 | struct snd_midi_channel *chan, | |
1da177e4 | 52 | int control, int value); |
c7e0b5bf TI |
53 | static void rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
54 | struct snd_midi_channel_set *chset); | |
55 | static void nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, | |
56 | struct snd_midi_channel_set *chset); | |
57 | static void sysex(struct snd_midi_op *ops, void *private, unsigned char *sysex, | |
58 | int len, struct snd_midi_channel_set *chset); | |
59 | static void all_sounds_off(struct snd_midi_op *ops, void *private, | |
60 | struct snd_midi_channel *chan); | |
61 | static void all_notes_off(struct snd_midi_op *ops, void *private, | |
62 | struct snd_midi_channel *chan); | |
63 | static void snd_midi_reset_controllers(struct snd_midi_channel *chan); | |
64 | static void reset_all_channels(struct snd_midi_channel_set *chset); | |
1da177e4 LT |
65 | |
66 | ||
67 | /* | |
68 | * Process an event in a driver independent way. This means dealing | |
69 | * with RPN, NRPN, SysEx etc that are defined for common midi applications | |
70 | * such as GM, GS and XG. | |
71 | * There modes that this module will run in are: | |
72 | * Generic MIDI - no interpretation at all, it will just save current values | |
3a4fa0a2 | 73 | * of controllers etc. |
1da177e4 LT |
74 | * GM - You can use all gm_ prefixed elements of chan. Controls, RPN, NRPN, |
75 | * SysEx will be interpreded as defined in General Midi. | |
76 | * GS - You can use all gs_ prefixed elements of chan. Codes for GS will be | |
77 | * interpreted. | |
78 | * XG - You can use all xg_ prefixed elements of chan. Codes for XG will | |
79 | * be interpreted. | |
80 | */ | |
81 | void | |
c7e0b5bf TI |
82 | snd_midi_process_event(struct snd_midi_op *ops, |
83 | struct snd_seq_event *ev, | |
84 | struct snd_midi_channel_set *chanset) | |
1da177e4 | 85 | { |
c7e0b5bf | 86 | struct snd_midi_channel *chan; |
1da177e4 LT |
87 | void *drv; |
88 | int dest_channel = 0; | |
89 | ||
90 | if (ev == NULL || chanset == NULL) { | |
91 | snd_printd("ev or chanbase NULL (snd_midi_process_event)\n"); | |
92 | return; | |
93 | } | |
94 | if (chanset->channels == NULL) | |
95 | return; | |
96 | ||
97 | if (snd_seq_ev_is_channel_type(ev)) { | |
98 | dest_channel = ev->data.note.channel; | |
99 | if (dest_channel >= chanset->max_channels) { | |
c7e0b5bf TI |
100 | snd_printd("dest channel is %d, max is %d\n", |
101 | dest_channel, chanset->max_channels); | |
1da177e4 LT |
102 | return; |
103 | } | |
104 | } | |
105 | ||
106 | chan = chanset->channels + dest_channel; | |
107 | drv = chanset->private_data; | |
108 | ||
109 | /* EVENT_NOTE should be processed before queued */ | |
110 | if (ev->type == SNDRV_SEQ_EVENT_NOTE) | |
111 | return; | |
112 | ||
113 | /* Make sure that we don't have a note on that should really be | |
114 | * a note off */ | |
115 | if (ev->type == SNDRV_SEQ_EVENT_NOTEON && ev->data.note.velocity == 0) | |
116 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; | |
117 | ||
118 | /* Make sure the note is within array range */ | |
119 | if (ev->type == SNDRV_SEQ_EVENT_NOTEON || | |
120 | ev->type == SNDRV_SEQ_EVENT_NOTEOFF || | |
121 | ev->type == SNDRV_SEQ_EVENT_KEYPRESS) { | |
122 | if (ev->data.note.note >= 128) | |
123 | return; | |
124 | } | |
125 | ||
126 | switch (ev->type) { | |
127 | case SNDRV_SEQ_EVENT_NOTEON: | |
128 | if (chan->note[ev->data.note.note] & SNDRV_MIDI_NOTE_ON) { | |
129 | if (ops->note_off) | |
130 | ops->note_off(drv, ev->data.note.note, 0, chan); | |
131 | } | |
132 | chan->note[ev->data.note.note] = SNDRV_MIDI_NOTE_ON; | |
133 | if (ops->note_on) | |
134 | ops->note_on(drv, ev->data.note.note, ev->data.note.velocity, chan); | |
135 | break; | |
136 | case SNDRV_SEQ_EVENT_NOTEOFF: | |
137 | if (! (chan->note[ev->data.note.note] & SNDRV_MIDI_NOTE_ON)) | |
138 | break; | |
139 | if (ops->note_off) | |
140 | note_off(ops, drv, chan, ev->data.note.note, ev->data.note.velocity); | |
141 | break; | |
142 | case SNDRV_SEQ_EVENT_KEYPRESS: | |
143 | if (ops->key_press) | |
144 | ops->key_press(drv, ev->data.note.note, ev->data.note.velocity, chan); | |
145 | break; | |
146 | case SNDRV_SEQ_EVENT_CONTROLLER: | |
147 | do_control(ops, drv, chanset, chan, | |
148 | ev->data.control.param, ev->data.control.value); | |
149 | break; | |
150 | case SNDRV_SEQ_EVENT_PGMCHANGE: | |
151 | chan->midi_program = ev->data.control.value; | |
152 | break; | |
153 | case SNDRV_SEQ_EVENT_PITCHBEND: | |
154 | chan->midi_pitchbend = ev->data.control.value; | |
155 | if (ops->control) | |
156 | ops->control(drv, MIDI_CTL_PITCHBEND, chan); | |
157 | break; | |
158 | case SNDRV_SEQ_EVENT_CHANPRESS: | |
159 | chan->midi_pressure = ev->data.control.value; | |
160 | if (ops->control) | |
161 | ops->control(drv, MIDI_CTL_CHAN_PRESSURE, chan); | |
162 | break; | |
163 | case SNDRV_SEQ_EVENT_CONTROL14: | |
164 | /* Best guess is that this is any of the 14 bit controller values */ | |
165 | if (ev->data.control.param < 32) { | |
166 | /* set low part first */ | |
167 | chan->control[ev->data.control.param + 32] = | |
168 | ev->data.control.value & 0x7f; | |
169 | do_control(ops, drv, chanset, chan, | |
170 | ev->data.control.param, | |
171 | ((ev->data.control.value>>7) & 0x7f)); | |
172 | } else | |
173 | do_control(ops, drv, chanset, chan, | |
174 | ev->data.control.param, | |
175 | ev->data.control.value); | |
176 | break; | |
177 | case SNDRV_SEQ_EVENT_NONREGPARAM: | |
3a4fa0a2 | 178 | /* Break it back into its controller values */ |
1da177e4 LT |
179 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_NONREGISTERED; |
180 | chan->control[MIDI_CTL_MSB_DATA_ENTRY] | |
181 | = (ev->data.control.value >> 7) & 0x7f; | |
182 | chan->control[MIDI_CTL_LSB_DATA_ENTRY] | |
183 | = ev->data.control.value & 0x7f; | |
184 | chan->control[MIDI_CTL_NONREG_PARM_NUM_MSB] | |
185 | = (ev->data.control.param >> 7) & 0x7f; | |
186 | chan->control[MIDI_CTL_NONREG_PARM_NUM_LSB] | |
187 | = ev->data.control.param & 0x7f; | |
188 | nrpn(ops, drv, chan, chanset); | |
189 | break; | |
190 | case SNDRV_SEQ_EVENT_REGPARAM: | |
3a4fa0a2 | 191 | /* Break it back into its controller values */ |
1da177e4 LT |
192 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_REGISTERED; |
193 | chan->control[MIDI_CTL_MSB_DATA_ENTRY] | |
194 | = (ev->data.control.value >> 7) & 0x7f; | |
195 | chan->control[MIDI_CTL_LSB_DATA_ENTRY] | |
196 | = ev->data.control.value & 0x7f; | |
197 | chan->control[MIDI_CTL_REGIST_PARM_NUM_MSB] | |
198 | = (ev->data.control.param >> 7) & 0x7f; | |
199 | chan->control[MIDI_CTL_REGIST_PARM_NUM_LSB] | |
200 | = ev->data.control.param & 0x7f; | |
201 | rpn(ops, drv, chan, chanset); | |
202 | break; | |
203 | case SNDRV_SEQ_EVENT_SYSEX: | |
204 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE) { | |
205 | unsigned char sysexbuf[64]; | |
206 | int len; | |
207 | len = snd_seq_expand_var_event(ev, sizeof(sysexbuf), sysexbuf, 1, 0); | |
208 | if (len > 0) | |
209 | sysex(ops, drv, sysexbuf, len, chanset); | |
210 | } | |
211 | break; | |
212 | case SNDRV_SEQ_EVENT_SONGPOS: | |
213 | case SNDRV_SEQ_EVENT_SONGSEL: | |
214 | case SNDRV_SEQ_EVENT_CLOCK: | |
215 | case SNDRV_SEQ_EVENT_START: | |
216 | case SNDRV_SEQ_EVENT_CONTINUE: | |
217 | case SNDRV_SEQ_EVENT_STOP: | |
218 | case SNDRV_SEQ_EVENT_QFRAME: | |
219 | case SNDRV_SEQ_EVENT_TEMPO: | |
220 | case SNDRV_SEQ_EVENT_TIMESIGN: | |
221 | case SNDRV_SEQ_EVENT_KEYSIGN: | |
222 | goto not_yet; | |
223 | case SNDRV_SEQ_EVENT_SENSING: | |
224 | break; | |
225 | case SNDRV_SEQ_EVENT_CLIENT_START: | |
226 | case SNDRV_SEQ_EVENT_CLIENT_EXIT: | |
227 | case SNDRV_SEQ_EVENT_CLIENT_CHANGE: | |
228 | case SNDRV_SEQ_EVENT_PORT_START: | |
229 | case SNDRV_SEQ_EVENT_PORT_EXIT: | |
230 | case SNDRV_SEQ_EVENT_PORT_CHANGE: | |
1da177e4 LT |
231 | case SNDRV_SEQ_EVENT_ECHO: |
232 | not_yet: | |
233 | default: | |
234 | /*snd_printd("Unimplemented event %d\n", ev->type);*/ | |
235 | break; | |
236 | } | |
237 | } | |
238 | ||
239 | ||
240 | /* | |
241 | * release note | |
242 | */ | |
243 | static void | |
c7e0b5bf TI |
244 | note_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
245 | int note, int vel) | |
1da177e4 LT |
246 | { |
247 | if (chan->gm_hold) { | |
248 | /* Hold this note until pedal is turned off */ | |
249 | chan->note[note] |= SNDRV_MIDI_NOTE_RELEASED; | |
250 | } else if (chan->note[note] & SNDRV_MIDI_NOTE_SOSTENUTO) { | |
251 | /* Mark this note as release; it will be turned off when sostenuto | |
252 | * is turned off */ | |
253 | chan->note[note] |= SNDRV_MIDI_NOTE_RELEASED; | |
254 | } else { | |
255 | chan->note[note] = 0; | |
256 | if (ops->note_off) | |
257 | ops->note_off(drv, note, vel, chan); | |
258 | } | |
259 | } | |
260 | ||
261 | /* | |
3a4fa0a2 | 262 | * Do all driver independent operations for this controller and pass |
1da177e4 LT |
263 | * events that need to take place immediately to the driver. |
264 | */ | |
265 | static void | |
c7e0b5bf TI |
266 | do_control(struct snd_midi_op *ops, void *drv, struct snd_midi_channel_set *chset, |
267 | struct snd_midi_channel *chan, int control, int value) | |
1da177e4 LT |
268 | { |
269 | int i; | |
270 | ||
271 | /* Switches */ | |
272 | if ((control >=64 && control <=69) || (control >= 80 && control <= 83)) { | |
273 | /* These are all switches; either off or on so set to 0 or 127 */ | |
274 | value = (value >= 64)? 127: 0; | |
275 | } | |
276 | chan->control[control] = value; | |
277 | ||
278 | switch (control) { | |
279 | case MIDI_CTL_SUSTAIN: | |
280 | if (value == 0) { | |
281 | /* Sustain has been released, turn off held notes */ | |
282 | for (i = 0; i < 128; i++) { | |
283 | if (chan->note[i] & SNDRV_MIDI_NOTE_RELEASED) { | |
284 | chan->note[i] = SNDRV_MIDI_NOTE_OFF; | |
285 | if (ops->note_off) | |
286 | ops->note_off(drv, i, 0, chan); | |
287 | } | |
288 | } | |
289 | } | |
290 | break; | |
291 | case MIDI_CTL_PORTAMENTO: | |
292 | break; | |
293 | case MIDI_CTL_SOSTENUTO: | |
294 | if (value) { | |
295 | /* Mark each note that is currently held down */ | |
296 | for (i = 0; i < 128; i++) { | |
297 | if (chan->note[i] & SNDRV_MIDI_NOTE_ON) | |
298 | chan->note[i] |= SNDRV_MIDI_NOTE_SOSTENUTO; | |
299 | } | |
300 | } else { | |
301 | /* release all notes that were held */ | |
302 | for (i = 0; i < 128; i++) { | |
303 | if (chan->note[i] & SNDRV_MIDI_NOTE_SOSTENUTO) { | |
304 | chan->note[i] &= ~SNDRV_MIDI_NOTE_SOSTENUTO; | |
305 | if (chan->note[i] & SNDRV_MIDI_NOTE_RELEASED) { | |
306 | chan->note[i] = SNDRV_MIDI_NOTE_OFF; | |
307 | if (ops->note_off) | |
308 | ops->note_off(drv, i, 0, chan); | |
309 | } | |
310 | } | |
311 | } | |
312 | } | |
313 | break; | |
314 | case MIDI_CTL_MSB_DATA_ENTRY: | |
315 | chan->control[MIDI_CTL_LSB_DATA_ENTRY] = 0; | |
316 | /* go through here */ | |
317 | case MIDI_CTL_LSB_DATA_ENTRY: | |
318 | if (chan->param_type == SNDRV_MIDI_PARAM_TYPE_REGISTERED) | |
319 | rpn(ops, drv, chan, chset); | |
320 | else | |
321 | nrpn(ops, drv, chan, chset); | |
322 | break; | |
323 | case MIDI_CTL_REGIST_PARM_NUM_LSB: | |
324 | case MIDI_CTL_REGIST_PARM_NUM_MSB: | |
325 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_REGISTERED; | |
326 | break; | |
327 | case MIDI_CTL_NONREG_PARM_NUM_LSB: | |
328 | case MIDI_CTL_NONREG_PARM_NUM_MSB: | |
329 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_NONREGISTERED; | |
330 | break; | |
331 | ||
332 | case MIDI_CTL_ALL_SOUNDS_OFF: | |
333 | all_sounds_off(ops, drv, chan); | |
334 | break; | |
335 | ||
336 | case MIDI_CTL_ALL_NOTES_OFF: | |
337 | all_notes_off(ops, drv, chan); | |
338 | break; | |
339 | ||
340 | case MIDI_CTL_MSB_BANK: | |
341 | if (chset->midi_mode == SNDRV_MIDI_MODE_XG) { | |
342 | if (value == 127) | |
343 | chan->drum_channel = 1; | |
344 | else | |
345 | chan->drum_channel = 0; | |
346 | } | |
347 | break; | |
348 | case MIDI_CTL_LSB_BANK: | |
349 | break; | |
350 | ||
351 | case MIDI_CTL_RESET_CONTROLLERS: | |
352 | snd_midi_reset_controllers(chan); | |
353 | break; | |
354 | ||
355 | case MIDI_CTL_SOFT_PEDAL: | |
356 | case MIDI_CTL_LEGATO_FOOTSWITCH: | |
357 | case MIDI_CTL_HOLD2: | |
358 | case MIDI_CTL_SC1_SOUND_VARIATION: | |
359 | case MIDI_CTL_SC2_TIMBRE: | |
360 | case MIDI_CTL_SC3_RELEASE_TIME: | |
361 | case MIDI_CTL_SC4_ATTACK_TIME: | |
362 | case MIDI_CTL_SC5_BRIGHTNESS: | |
363 | case MIDI_CTL_E1_REVERB_DEPTH: | |
364 | case MIDI_CTL_E2_TREMOLO_DEPTH: | |
365 | case MIDI_CTL_E3_CHORUS_DEPTH: | |
366 | case MIDI_CTL_E4_DETUNE_DEPTH: | |
367 | case MIDI_CTL_E5_PHASER_DEPTH: | |
368 | goto notyet; | |
369 | notyet: | |
370 | default: | |
371 | if (ops->control) | |
372 | ops->control(drv, control, chan); | |
373 | break; | |
374 | } | |
375 | } | |
376 | ||
377 | ||
378 | /* | |
379 | * initialize the MIDI status | |
380 | */ | |
381 | void | |
c7e0b5bf | 382 | snd_midi_channel_set_clear(struct snd_midi_channel_set *chset) |
1da177e4 LT |
383 | { |
384 | int i; | |
385 | ||
386 | chset->midi_mode = SNDRV_MIDI_MODE_GM; | |
387 | chset->gs_master_volume = 127; | |
388 | ||
389 | for (i = 0; i < chset->max_channels; i++) { | |
c7e0b5bf | 390 | struct snd_midi_channel *chan = chset->channels + i; |
1da177e4 LT |
391 | memset(chan->note, 0, sizeof(chan->note)); |
392 | ||
393 | chan->midi_aftertouch = 0; | |
394 | chan->midi_pressure = 0; | |
395 | chan->midi_program = 0; | |
396 | chan->midi_pitchbend = 0; | |
397 | snd_midi_reset_controllers(chan); | |
398 | chan->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ | |
399 | chan->gm_rpn_fine_tuning = 0; | |
400 | chan->gm_rpn_coarse_tuning = 0; | |
401 | ||
402 | if (i == 9) | |
403 | chan->drum_channel = 1; | |
404 | else | |
405 | chan->drum_channel = 0; | |
406 | } | |
407 | } | |
408 | ||
409 | /* | |
410 | * Process a rpn message. | |
411 | */ | |
412 | static void | |
c7e0b5bf TI |
413 | rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
414 | struct snd_midi_channel_set *chset) | |
1da177e4 LT |
415 | { |
416 | int type; | |
417 | int val; | |
418 | ||
419 | if (chset->midi_mode != SNDRV_MIDI_MODE_NONE) { | |
420 | type = (chan->control[MIDI_CTL_REGIST_PARM_NUM_MSB] << 8) | | |
421 | chan->control[MIDI_CTL_REGIST_PARM_NUM_LSB]; | |
422 | val = (chan->control[MIDI_CTL_MSB_DATA_ENTRY] << 7) | | |
423 | chan->control[MIDI_CTL_LSB_DATA_ENTRY]; | |
424 | ||
425 | switch (type) { | |
426 | case 0x0000: /* Pitch bend sensitivity */ | |
427 | /* MSB only / 1 semitone per 128 */ | |
428 | chan->gm_rpn_pitch_bend_range = val; | |
429 | break; | |
430 | ||
431 | case 0x0001: /* fine tuning: */ | |
432 | /* MSB/LSB, 8192=center, 100/8192 cent step */ | |
433 | chan->gm_rpn_fine_tuning = val - 8192; | |
434 | break; | |
435 | ||
436 | case 0x0002: /* coarse tuning */ | |
437 | /* MSB only / 8192=center, 1 semitone per 128 */ | |
438 | chan->gm_rpn_coarse_tuning = val - 8192; | |
439 | break; | |
440 | ||
441 | case 0x7F7F: /* "lock-in" RPN */ | |
442 | /* ignored */ | |
443 | break; | |
444 | } | |
445 | } | |
446 | /* should call nrpn or rpn callback here.. */ | |
447 | } | |
448 | ||
449 | /* | |
450 | * Process an nrpn message. | |
451 | */ | |
452 | static void | |
c7e0b5bf TI |
453 | nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
454 | struct snd_midi_channel_set *chset) | |
1da177e4 LT |
455 | { |
456 | /* parse XG NRPNs here if possible */ | |
457 | if (ops->nrpn) | |
458 | ops->nrpn(drv, chan, chset); | |
459 | } | |
460 | ||
461 | ||
462 | /* | |
463 | * convert channel parameter in GS sysex | |
464 | */ | |
465 | static int | |
466 | get_channel(unsigned char cmd) | |
467 | { | |
468 | int p = cmd & 0x0f; | |
469 | if (p == 0) | |
470 | p = 9; | |
471 | else if (p < 10) | |
472 | p--; | |
473 | return p; | |
474 | } | |
475 | ||
476 | ||
477 | /* | |
478 | * Process a sysex message. | |
479 | */ | |
480 | static void | |
c7e0b5bf TI |
481 | sysex(struct snd_midi_op *ops, void *private, unsigned char *buf, int len, |
482 | struct snd_midi_channel_set *chset) | |
1da177e4 LT |
483 | { |
484 | /* GM on */ | |
485 | static unsigned char gm_on_macro[] = { | |
486 | 0x7e,0x7f,0x09,0x01, | |
487 | }; | |
488 | /* XG on */ | |
489 | static unsigned char xg_on_macro[] = { | |
490 | 0x43,0x10,0x4c,0x00,0x00,0x7e,0x00, | |
491 | }; | |
492 | /* GS prefix | |
493 | * drum channel: XX=0x1?(channel), YY=0x15, ZZ=on/off | |
494 | * reverb mode: XX=0x01, YY=0x30, ZZ=0-7 | |
495 | * chorus mode: XX=0x01, YY=0x38, ZZ=0-7 | |
496 | * master vol: XX=0x00, YY=0x04, ZZ=0-127 | |
497 | */ | |
498 | static unsigned char gs_pfx_macro[] = { | |
499 | 0x41,0x10,0x42,0x12,0x40,/*XX,YY,ZZ*/ | |
500 | }; | |
501 | ||
502 | int parsed = SNDRV_MIDI_SYSEX_NOT_PARSED; | |
503 | ||
504 | if (len <= 0 || buf[0] != 0xf0) | |
505 | return; | |
506 | /* skip first byte */ | |
507 | buf++; | |
508 | len--; | |
509 | ||
510 | /* GM on */ | |
511 | if (len >= (int)sizeof(gm_on_macro) && | |
512 | memcmp(buf, gm_on_macro, sizeof(gm_on_macro)) == 0) { | |
513 | if (chset->midi_mode != SNDRV_MIDI_MODE_GS && | |
514 | chset->midi_mode != SNDRV_MIDI_MODE_XG) { | |
515 | chset->midi_mode = SNDRV_MIDI_MODE_GM; | |
516 | reset_all_channels(chset); | |
517 | parsed = SNDRV_MIDI_SYSEX_GM_ON; | |
518 | } | |
519 | } | |
520 | ||
521 | /* GS macros */ | |
522 | else if (len >= 8 && | |
523 | memcmp(buf, gs_pfx_macro, sizeof(gs_pfx_macro)) == 0) { | |
524 | if (chset->midi_mode != SNDRV_MIDI_MODE_GS && | |
525 | chset->midi_mode != SNDRV_MIDI_MODE_XG) | |
526 | chset->midi_mode = SNDRV_MIDI_MODE_GS; | |
527 | ||
528 | if (buf[5] == 0x00 && buf[6] == 0x7f && buf[7] == 0x00) { | |
529 | /* GS reset */ | |
530 | parsed = SNDRV_MIDI_SYSEX_GS_RESET; | |
531 | reset_all_channels(chset); | |
532 | } | |
533 | ||
534 | else if ((buf[5] & 0xf0) == 0x10 && buf[6] == 0x15) { | |
535 | /* drum pattern */ | |
536 | int p = get_channel(buf[5]); | |
537 | if (p < chset->max_channels) { | |
538 | parsed = SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL; | |
539 | if (buf[7]) | |
540 | chset->channels[p].drum_channel = 1; | |
541 | else | |
542 | chset->channels[p].drum_channel = 0; | |
543 | } | |
544 | ||
545 | } else if ((buf[5] & 0xf0) == 0x10 && buf[6] == 0x21) { | |
546 | /* program */ | |
547 | int p = get_channel(buf[5]); | |
548 | if (p < chset->max_channels && | |
549 | ! chset->channels[p].drum_channel) { | |
550 | parsed = SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL; | |
551 | chset->channels[p].midi_program = buf[7]; | |
552 | } | |
553 | ||
554 | } else if (buf[5] == 0x01 && buf[6] == 0x30) { | |
555 | /* reverb mode */ | |
556 | parsed = SNDRV_MIDI_SYSEX_GS_REVERB_MODE; | |
557 | chset->gs_reverb_mode = buf[7]; | |
558 | ||
559 | } else if (buf[5] == 0x01 && buf[6] == 0x38) { | |
560 | /* chorus mode */ | |
561 | parsed = SNDRV_MIDI_SYSEX_GS_CHORUS_MODE; | |
562 | chset->gs_chorus_mode = buf[7]; | |
563 | ||
564 | } else if (buf[5] == 0x00 && buf[6] == 0x04) { | |
565 | /* master volume */ | |
566 | parsed = SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME; | |
567 | chset->gs_master_volume = buf[7]; | |
568 | ||
569 | } | |
570 | } | |
571 | ||
572 | /* XG on */ | |
573 | else if (len >= (int)sizeof(xg_on_macro) && | |
574 | memcmp(buf, xg_on_macro, sizeof(xg_on_macro)) == 0) { | |
575 | int i; | |
576 | chset->midi_mode = SNDRV_MIDI_MODE_XG; | |
577 | parsed = SNDRV_MIDI_SYSEX_XG_ON; | |
578 | /* reset CC#0 for drums */ | |
579 | for (i = 0; i < chset->max_channels; i++) { | |
580 | if (chset->channels[i].drum_channel) | |
581 | chset->channels[i].control[MIDI_CTL_MSB_BANK] = 127; | |
582 | else | |
583 | chset->channels[i].control[MIDI_CTL_MSB_BANK] = 0; | |
584 | } | |
585 | } | |
586 | ||
587 | if (ops->sysex) | |
588 | ops->sysex(private, buf - 1, len + 1, parsed, chset); | |
589 | } | |
590 | ||
591 | /* | |
592 | * all sound off | |
593 | */ | |
594 | static void | |
c7e0b5bf | 595 | all_sounds_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan) |
1da177e4 LT |
596 | { |
597 | int n; | |
598 | ||
599 | if (! ops->note_terminate) | |
600 | return; | |
601 | for (n = 0; n < 128; n++) { | |
602 | if (chan->note[n]) { | |
603 | ops->note_terminate(drv, n, chan); | |
604 | chan->note[n] = 0; | |
605 | } | |
606 | } | |
607 | } | |
608 | ||
609 | /* | |
610 | * all notes off | |
611 | */ | |
612 | static void | |
c7e0b5bf | 613 | all_notes_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan) |
1da177e4 LT |
614 | { |
615 | int n; | |
616 | ||
617 | if (! ops->note_off) | |
618 | return; | |
619 | for (n = 0; n < 128; n++) { | |
620 | if (chan->note[n] == SNDRV_MIDI_NOTE_ON) | |
621 | note_off(ops, drv, chan, n, 0); | |
622 | } | |
623 | } | |
624 | ||
625 | /* | |
626 | * Initialise a single midi channel control block. | |
627 | */ | |
c7e0b5bf | 628 | static void snd_midi_channel_init(struct snd_midi_channel *p, int n) |
1da177e4 LT |
629 | { |
630 | if (p == NULL) | |
631 | return; | |
632 | ||
c7e0b5bf | 633 | memset(p, 0, sizeof(struct snd_midi_channel)); |
1da177e4 LT |
634 | p->private = NULL; |
635 | p->number = n; | |
636 | ||
637 | snd_midi_reset_controllers(p); | |
638 | p->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ | |
639 | p->gm_rpn_fine_tuning = 0; | |
640 | p->gm_rpn_coarse_tuning = 0; | |
641 | ||
642 | if (n == 9) | |
643 | p->drum_channel = 1; /* Default ch 10 as drums */ | |
644 | } | |
645 | ||
646 | /* | |
647 | * Allocate and initialise a set of midi channel control blocks. | |
648 | */ | |
c7e0b5bf | 649 | static struct snd_midi_channel *snd_midi_channel_init_set(int n) |
1da177e4 | 650 | { |
c7e0b5bf | 651 | struct snd_midi_channel *chan; |
1da177e4 LT |
652 | int i; |
653 | ||
c7e0b5bf | 654 | chan = kmalloc(n * sizeof(struct snd_midi_channel), GFP_KERNEL); |
1da177e4 LT |
655 | if (chan) { |
656 | for (i = 0; i < n; i++) | |
657 | snd_midi_channel_init(chan+i, i); | |
658 | } | |
659 | ||
660 | return chan; | |
661 | } | |
662 | ||
663 | /* | |
664 | * reset all midi channels | |
665 | */ | |
666 | static void | |
c7e0b5bf | 667 | reset_all_channels(struct snd_midi_channel_set *chset) |
1da177e4 LT |
668 | { |
669 | int ch; | |
670 | for (ch = 0; ch < chset->max_channels; ch++) { | |
c7e0b5bf | 671 | struct snd_midi_channel *chan = chset->channels + ch; |
1da177e4 LT |
672 | snd_midi_reset_controllers(chan); |
673 | chan->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ | |
674 | chan->gm_rpn_fine_tuning = 0; | |
675 | chan->gm_rpn_coarse_tuning = 0; | |
676 | ||
677 | if (ch == 9) | |
678 | chan->drum_channel = 1; | |
679 | else | |
680 | chan->drum_channel = 0; | |
681 | } | |
682 | } | |
683 | ||
684 | ||
685 | /* | |
686 | * Allocate and initialise a midi channel set. | |
687 | */ | |
c7e0b5bf | 688 | struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n) |
1da177e4 | 689 | { |
c7e0b5bf | 690 | struct snd_midi_channel_set *chset; |
1da177e4 LT |
691 | |
692 | chset = kmalloc(sizeof(*chset), GFP_KERNEL); | |
693 | if (chset) { | |
694 | chset->channels = snd_midi_channel_init_set(n); | |
695 | chset->private_data = NULL; | |
696 | chset->max_channels = n; | |
697 | } | |
698 | return chset; | |
699 | } | |
700 | ||
701 | /* | |
702 | * Reset the midi controllers on a particular channel to default values. | |
703 | */ | |
c7e0b5bf | 704 | static void snd_midi_reset_controllers(struct snd_midi_channel *chan) |
1da177e4 LT |
705 | { |
706 | memset(chan->control, 0, sizeof(chan->control)); | |
707 | chan->gm_volume = 127; | |
708 | chan->gm_expression = 127; | |
709 | chan->gm_pan = 64; | |
710 | } | |
711 | ||
712 | ||
713 | /* | |
714 | * Free a midi channel set. | |
715 | */ | |
c7e0b5bf | 716 | void snd_midi_channel_free_set(struct snd_midi_channel_set *chset) |
1da177e4 LT |
717 | { |
718 | if (chset == NULL) | |
719 | return; | |
720 | kfree(chset->channels); | |
721 | kfree(chset); | |
722 | } | |
723 | ||
724 | static int __init alsa_seq_midi_emul_init(void) | |
725 | { | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static void __exit alsa_seq_midi_emul_exit(void) | |
730 | { | |
731 | } | |
732 | ||
733 | module_init(alsa_seq_midi_emul_init) | |
734 | module_exit(alsa_seq_midi_emul_exit) | |
735 | ||
736 | EXPORT_SYMBOL(snd_midi_process_event); | |
737 | EXPORT_SYMBOL(snd_midi_channel_set_clear); | |
738 | EXPORT_SYMBOL(snd_midi_channel_alloc_set); | |
739 | EXPORT_SYMBOL(snd_midi_channel_free_set); |