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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * GM/GS/XG midi module. | |
4 | * | |
5 | * Copyright (C) 1999 Steve Ratcliffe | |
6 | * | |
7 | * Based on awe_wave.c by Takashi Iwai | |
1da177e4 LT |
8 | */ |
9 | /* | |
10 | * This module is used to keep track of the current midi state. | |
11 | * It can be used for drivers that are required to emulate midi when | |
12 | * the hardware doesn't. | |
13 | * | |
14 | * It was written for a AWE64 driver, but there should be no AWE specific | |
15 | * code in here. If there is it should be reported as a bug. | |
16 | */ | |
17 | ||
1da177e4 LT |
18 | #include <linux/init.h> |
19 | #include <linux/slab.h> | |
20 | #include <linux/string.h> | |
da155d5b | 21 | #include <linux/module.h> |
1da177e4 LT |
22 | #include <sound/core.h> |
23 | #include <sound/seq_kernel.h> | |
24 | #include <sound/seq_midi_emul.h> | |
25 | #include <sound/initval.h> | |
26 | #include <sound/asoundef.h> | |
27 | ||
28 | MODULE_AUTHOR("Takashi Iwai / Steve Ratcliffe"); | |
29 | MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI emulation."); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
32 | /* Prototypes for static functions */ | |
c7e0b5bf TI |
33 | static void note_off(struct snd_midi_op *ops, void *drv, |
34 | struct snd_midi_channel *chan, | |
35 | int note, int vel); | |
36 | static void do_control(struct snd_midi_op *ops, void *private, | |
37 | struct snd_midi_channel_set *chset, | |
38 | struct snd_midi_channel *chan, | |
1da177e4 | 39 | int control, int value); |
c7e0b5bf TI |
40 | static void rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
41 | struct snd_midi_channel_set *chset); | |
42 | static void nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, | |
43 | struct snd_midi_channel_set *chset); | |
44 | static void sysex(struct snd_midi_op *ops, void *private, unsigned char *sysex, | |
45 | int len, struct snd_midi_channel_set *chset); | |
46 | static void all_sounds_off(struct snd_midi_op *ops, void *private, | |
47 | struct snd_midi_channel *chan); | |
48 | static void all_notes_off(struct snd_midi_op *ops, void *private, | |
49 | struct snd_midi_channel *chan); | |
50 | static void snd_midi_reset_controllers(struct snd_midi_channel *chan); | |
51 | static void reset_all_channels(struct snd_midi_channel_set *chset); | |
1da177e4 LT |
52 | |
53 | ||
54 | /* | |
55 | * Process an event in a driver independent way. This means dealing | |
56 | * with RPN, NRPN, SysEx etc that are defined for common midi applications | |
57 | * such as GM, GS and XG. | |
58 | * There modes that this module will run in are: | |
59 | * Generic MIDI - no interpretation at all, it will just save current values | |
3a4fa0a2 | 60 | * of controllers etc. |
1da177e4 LT |
61 | * GM - You can use all gm_ prefixed elements of chan. Controls, RPN, NRPN, |
62 | * SysEx will be interpreded as defined in General Midi. | |
63 | * GS - You can use all gs_ prefixed elements of chan. Codes for GS will be | |
64 | * interpreted. | |
65 | * XG - You can use all xg_ prefixed elements of chan. Codes for XG will | |
66 | * be interpreted. | |
67 | */ | |
68 | void | |
c7e0b5bf TI |
69 | snd_midi_process_event(struct snd_midi_op *ops, |
70 | struct snd_seq_event *ev, | |
71 | struct snd_midi_channel_set *chanset) | |
1da177e4 | 72 | { |
c7e0b5bf | 73 | struct snd_midi_channel *chan; |
1da177e4 LT |
74 | void *drv; |
75 | int dest_channel = 0; | |
76 | ||
77 | if (ev == NULL || chanset == NULL) { | |
04cc79a0 | 78 | pr_debug("ALSA: seq_midi_emul: ev or chanbase NULL (snd_midi_process_event)\n"); |
1da177e4 LT |
79 | return; |
80 | } | |
81 | if (chanset->channels == NULL) | |
82 | return; | |
83 | ||
84 | if (snd_seq_ev_is_channel_type(ev)) { | |
85 | dest_channel = ev->data.note.channel; | |
86 | if (dest_channel >= chanset->max_channels) { | |
04cc79a0 | 87 | pr_debug("ALSA: seq_midi_emul: dest channel is %d, max is %d\n", |
c7e0b5bf | 88 | dest_channel, chanset->max_channels); |
1da177e4 LT |
89 | return; |
90 | } | |
91 | } | |
92 | ||
93 | chan = chanset->channels + dest_channel; | |
94 | drv = chanset->private_data; | |
95 | ||
96 | /* EVENT_NOTE should be processed before queued */ | |
97 | if (ev->type == SNDRV_SEQ_EVENT_NOTE) | |
98 | return; | |
99 | ||
100 | /* Make sure that we don't have a note on that should really be | |
101 | * a note off */ | |
102 | if (ev->type == SNDRV_SEQ_EVENT_NOTEON && ev->data.note.velocity == 0) | |
103 | ev->type = SNDRV_SEQ_EVENT_NOTEOFF; | |
104 | ||
105 | /* Make sure the note is within array range */ | |
106 | if (ev->type == SNDRV_SEQ_EVENT_NOTEON || | |
107 | ev->type == SNDRV_SEQ_EVENT_NOTEOFF || | |
108 | ev->type == SNDRV_SEQ_EVENT_KEYPRESS) { | |
109 | if (ev->data.note.note >= 128) | |
110 | return; | |
111 | } | |
112 | ||
113 | switch (ev->type) { | |
114 | case SNDRV_SEQ_EVENT_NOTEON: | |
115 | if (chan->note[ev->data.note.note] & SNDRV_MIDI_NOTE_ON) { | |
116 | if (ops->note_off) | |
117 | ops->note_off(drv, ev->data.note.note, 0, chan); | |
118 | } | |
119 | chan->note[ev->data.note.note] = SNDRV_MIDI_NOTE_ON; | |
120 | if (ops->note_on) | |
121 | ops->note_on(drv, ev->data.note.note, ev->data.note.velocity, chan); | |
122 | break; | |
123 | case SNDRV_SEQ_EVENT_NOTEOFF: | |
124 | if (! (chan->note[ev->data.note.note] & SNDRV_MIDI_NOTE_ON)) | |
125 | break; | |
126 | if (ops->note_off) | |
127 | note_off(ops, drv, chan, ev->data.note.note, ev->data.note.velocity); | |
128 | break; | |
129 | case SNDRV_SEQ_EVENT_KEYPRESS: | |
130 | if (ops->key_press) | |
131 | ops->key_press(drv, ev->data.note.note, ev->data.note.velocity, chan); | |
132 | break; | |
133 | case SNDRV_SEQ_EVENT_CONTROLLER: | |
134 | do_control(ops, drv, chanset, chan, | |
135 | ev->data.control.param, ev->data.control.value); | |
136 | break; | |
137 | case SNDRV_SEQ_EVENT_PGMCHANGE: | |
138 | chan->midi_program = ev->data.control.value; | |
139 | break; | |
140 | case SNDRV_SEQ_EVENT_PITCHBEND: | |
141 | chan->midi_pitchbend = ev->data.control.value; | |
142 | if (ops->control) | |
143 | ops->control(drv, MIDI_CTL_PITCHBEND, chan); | |
144 | break; | |
145 | case SNDRV_SEQ_EVENT_CHANPRESS: | |
146 | chan->midi_pressure = ev->data.control.value; | |
147 | if (ops->control) | |
148 | ops->control(drv, MIDI_CTL_CHAN_PRESSURE, chan); | |
149 | break; | |
150 | case SNDRV_SEQ_EVENT_CONTROL14: | |
151 | /* Best guess is that this is any of the 14 bit controller values */ | |
152 | if (ev->data.control.param < 32) { | |
153 | /* set low part first */ | |
154 | chan->control[ev->data.control.param + 32] = | |
155 | ev->data.control.value & 0x7f; | |
156 | do_control(ops, drv, chanset, chan, | |
157 | ev->data.control.param, | |
158 | ((ev->data.control.value>>7) & 0x7f)); | |
159 | } else | |
160 | do_control(ops, drv, chanset, chan, | |
161 | ev->data.control.param, | |
162 | ev->data.control.value); | |
163 | break; | |
164 | case SNDRV_SEQ_EVENT_NONREGPARAM: | |
3a4fa0a2 | 165 | /* Break it back into its controller values */ |
1da177e4 LT |
166 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_NONREGISTERED; |
167 | chan->control[MIDI_CTL_MSB_DATA_ENTRY] | |
168 | = (ev->data.control.value >> 7) & 0x7f; | |
169 | chan->control[MIDI_CTL_LSB_DATA_ENTRY] | |
170 | = ev->data.control.value & 0x7f; | |
171 | chan->control[MIDI_CTL_NONREG_PARM_NUM_MSB] | |
172 | = (ev->data.control.param >> 7) & 0x7f; | |
173 | chan->control[MIDI_CTL_NONREG_PARM_NUM_LSB] | |
174 | = ev->data.control.param & 0x7f; | |
175 | nrpn(ops, drv, chan, chanset); | |
176 | break; | |
177 | case SNDRV_SEQ_EVENT_REGPARAM: | |
3a4fa0a2 | 178 | /* Break it back into its controller values */ |
1da177e4 LT |
179 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_REGISTERED; |
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_REGIST_PARM_NUM_MSB] | |
185 | = (ev->data.control.param >> 7) & 0x7f; | |
186 | chan->control[MIDI_CTL_REGIST_PARM_NUM_LSB] | |
187 | = ev->data.control.param & 0x7f; | |
188 | rpn(ops, drv, chan, chanset); | |
189 | break; | |
190 | case SNDRV_SEQ_EVENT_SYSEX: | |
191 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE) { | |
192 | unsigned char sysexbuf[64]; | |
193 | int len; | |
194 | len = snd_seq_expand_var_event(ev, sizeof(sysexbuf), sysexbuf, 1, 0); | |
195 | if (len > 0) | |
196 | sysex(ops, drv, sysexbuf, len, chanset); | |
197 | } | |
198 | break; | |
199 | case SNDRV_SEQ_EVENT_SONGPOS: | |
200 | case SNDRV_SEQ_EVENT_SONGSEL: | |
201 | case SNDRV_SEQ_EVENT_CLOCK: | |
202 | case SNDRV_SEQ_EVENT_START: | |
203 | case SNDRV_SEQ_EVENT_CONTINUE: | |
204 | case SNDRV_SEQ_EVENT_STOP: | |
205 | case SNDRV_SEQ_EVENT_QFRAME: | |
206 | case SNDRV_SEQ_EVENT_TEMPO: | |
207 | case SNDRV_SEQ_EVENT_TIMESIGN: | |
208 | case SNDRV_SEQ_EVENT_KEYSIGN: | |
209 | goto not_yet; | |
210 | case SNDRV_SEQ_EVENT_SENSING: | |
211 | break; | |
212 | case SNDRV_SEQ_EVENT_CLIENT_START: | |
213 | case SNDRV_SEQ_EVENT_CLIENT_EXIT: | |
214 | case SNDRV_SEQ_EVENT_CLIENT_CHANGE: | |
215 | case SNDRV_SEQ_EVENT_PORT_START: | |
216 | case SNDRV_SEQ_EVENT_PORT_EXIT: | |
217 | case SNDRV_SEQ_EVENT_PORT_CHANGE: | |
1da177e4 LT |
218 | case SNDRV_SEQ_EVENT_ECHO: |
219 | not_yet: | |
220 | default: | |
04cc79a0 | 221 | /*pr_debug("ALSA: seq_midi_emul: Unimplemented event %d\n", ev->type);*/ |
1da177e4 LT |
222 | break; |
223 | } | |
224 | } | |
9c8ddd10 | 225 | EXPORT_SYMBOL(snd_midi_process_event); |
1da177e4 LT |
226 | |
227 | ||
228 | /* | |
229 | * release note | |
230 | */ | |
231 | static void | |
c7e0b5bf TI |
232 | note_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
233 | int note, int vel) | |
1da177e4 LT |
234 | { |
235 | if (chan->gm_hold) { | |
236 | /* Hold this note until pedal is turned off */ | |
237 | chan->note[note] |= SNDRV_MIDI_NOTE_RELEASED; | |
238 | } else if (chan->note[note] & SNDRV_MIDI_NOTE_SOSTENUTO) { | |
239 | /* Mark this note as release; it will be turned off when sostenuto | |
240 | * is turned off */ | |
241 | chan->note[note] |= SNDRV_MIDI_NOTE_RELEASED; | |
242 | } else { | |
243 | chan->note[note] = 0; | |
244 | if (ops->note_off) | |
245 | ops->note_off(drv, note, vel, chan); | |
246 | } | |
247 | } | |
248 | ||
249 | /* | |
3a4fa0a2 | 250 | * Do all driver independent operations for this controller and pass |
1da177e4 LT |
251 | * events that need to take place immediately to the driver. |
252 | */ | |
253 | static void | |
c7e0b5bf TI |
254 | do_control(struct snd_midi_op *ops, void *drv, struct snd_midi_channel_set *chset, |
255 | struct snd_midi_channel *chan, int control, int value) | |
1da177e4 LT |
256 | { |
257 | int i; | |
258 | ||
0b444af8 DC |
259 | if (control >= ARRAY_SIZE(chan->control)) |
260 | return; | |
261 | ||
1da177e4 LT |
262 | /* Switches */ |
263 | if ((control >=64 && control <=69) || (control >= 80 && control <= 83)) { | |
264 | /* These are all switches; either off or on so set to 0 or 127 */ | |
265 | value = (value >= 64)? 127: 0; | |
266 | } | |
267 | chan->control[control] = value; | |
268 | ||
269 | switch (control) { | |
270 | case MIDI_CTL_SUSTAIN: | |
271 | if (value == 0) { | |
272 | /* Sustain has been released, turn off held notes */ | |
273 | for (i = 0; i < 128; i++) { | |
274 | if (chan->note[i] & SNDRV_MIDI_NOTE_RELEASED) { | |
275 | chan->note[i] = SNDRV_MIDI_NOTE_OFF; | |
276 | if (ops->note_off) | |
277 | ops->note_off(drv, i, 0, chan); | |
278 | } | |
279 | } | |
280 | } | |
281 | break; | |
282 | case MIDI_CTL_PORTAMENTO: | |
283 | break; | |
284 | case MIDI_CTL_SOSTENUTO: | |
285 | if (value) { | |
286 | /* Mark each note that is currently held down */ | |
287 | for (i = 0; i < 128; i++) { | |
288 | if (chan->note[i] & SNDRV_MIDI_NOTE_ON) | |
289 | chan->note[i] |= SNDRV_MIDI_NOTE_SOSTENUTO; | |
290 | } | |
291 | } else { | |
292 | /* release all notes that were held */ | |
293 | for (i = 0; i < 128; i++) { | |
294 | if (chan->note[i] & SNDRV_MIDI_NOTE_SOSTENUTO) { | |
295 | chan->note[i] &= ~SNDRV_MIDI_NOTE_SOSTENUTO; | |
296 | if (chan->note[i] & SNDRV_MIDI_NOTE_RELEASED) { | |
297 | chan->note[i] = SNDRV_MIDI_NOTE_OFF; | |
298 | if (ops->note_off) | |
299 | ops->note_off(drv, i, 0, chan); | |
300 | } | |
301 | } | |
302 | } | |
303 | } | |
304 | break; | |
305 | case MIDI_CTL_MSB_DATA_ENTRY: | |
306 | chan->control[MIDI_CTL_LSB_DATA_ENTRY] = 0; | |
2f3b94e5 | 307 | /* fall through */ |
1da177e4 LT |
308 | case MIDI_CTL_LSB_DATA_ENTRY: |
309 | if (chan->param_type == SNDRV_MIDI_PARAM_TYPE_REGISTERED) | |
310 | rpn(ops, drv, chan, chset); | |
311 | else | |
312 | nrpn(ops, drv, chan, chset); | |
313 | break; | |
314 | case MIDI_CTL_REGIST_PARM_NUM_LSB: | |
315 | case MIDI_CTL_REGIST_PARM_NUM_MSB: | |
316 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_REGISTERED; | |
317 | break; | |
318 | case MIDI_CTL_NONREG_PARM_NUM_LSB: | |
319 | case MIDI_CTL_NONREG_PARM_NUM_MSB: | |
320 | chan->param_type = SNDRV_MIDI_PARAM_TYPE_NONREGISTERED; | |
321 | break; | |
322 | ||
323 | case MIDI_CTL_ALL_SOUNDS_OFF: | |
324 | all_sounds_off(ops, drv, chan); | |
325 | break; | |
326 | ||
327 | case MIDI_CTL_ALL_NOTES_OFF: | |
328 | all_notes_off(ops, drv, chan); | |
329 | break; | |
330 | ||
331 | case MIDI_CTL_MSB_BANK: | |
332 | if (chset->midi_mode == SNDRV_MIDI_MODE_XG) { | |
333 | if (value == 127) | |
334 | chan->drum_channel = 1; | |
335 | else | |
336 | chan->drum_channel = 0; | |
337 | } | |
338 | break; | |
339 | case MIDI_CTL_LSB_BANK: | |
340 | break; | |
341 | ||
342 | case MIDI_CTL_RESET_CONTROLLERS: | |
343 | snd_midi_reset_controllers(chan); | |
344 | break; | |
345 | ||
346 | case MIDI_CTL_SOFT_PEDAL: | |
347 | case MIDI_CTL_LEGATO_FOOTSWITCH: | |
348 | case MIDI_CTL_HOLD2: | |
349 | case MIDI_CTL_SC1_SOUND_VARIATION: | |
350 | case MIDI_CTL_SC2_TIMBRE: | |
351 | case MIDI_CTL_SC3_RELEASE_TIME: | |
352 | case MIDI_CTL_SC4_ATTACK_TIME: | |
353 | case MIDI_CTL_SC5_BRIGHTNESS: | |
354 | case MIDI_CTL_E1_REVERB_DEPTH: | |
355 | case MIDI_CTL_E2_TREMOLO_DEPTH: | |
356 | case MIDI_CTL_E3_CHORUS_DEPTH: | |
357 | case MIDI_CTL_E4_DETUNE_DEPTH: | |
358 | case MIDI_CTL_E5_PHASER_DEPTH: | |
359 | goto notyet; | |
360 | notyet: | |
361 | default: | |
362 | if (ops->control) | |
363 | ops->control(drv, control, chan); | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | ||
369 | /* | |
370 | * initialize the MIDI status | |
371 | */ | |
372 | void | |
c7e0b5bf | 373 | snd_midi_channel_set_clear(struct snd_midi_channel_set *chset) |
1da177e4 LT |
374 | { |
375 | int i; | |
376 | ||
377 | chset->midi_mode = SNDRV_MIDI_MODE_GM; | |
378 | chset->gs_master_volume = 127; | |
379 | ||
380 | for (i = 0; i < chset->max_channels; i++) { | |
c7e0b5bf | 381 | struct snd_midi_channel *chan = chset->channels + i; |
1da177e4 LT |
382 | memset(chan->note, 0, sizeof(chan->note)); |
383 | ||
384 | chan->midi_aftertouch = 0; | |
385 | chan->midi_pressure = 0; | |
386 | chan->midi_program = 0; | |
387 | chan->midi_pitchbend = 0; | |
388 | snd_midi_reset_controllers(chan); | |
389 | chan->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ | |
390 | chan->gm_rpn_fine_tuning = 0; | |
391 | chan->gm_rpn_coarse_tuning = 0; | |
392 | ||
393 | if (i == 9) | |
394 | chan->drum_channel = 1; | |
395 | else | |
396 | chan->drum_channel = 0; | |
397 | } | |
398 | } | |
9c8ddd10 | 399 | EXPORT_SYMBOL(snd_midi_channel_set_clear); |
1da177e4 LT |
400 | |
401 | /* | |
402 | * Process a rpn message. | |
403 | */ | |
404 | static void | |
c7e0b5bf TI |
405 | rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
406 | struct snd_midi_channel_set *chset) | |
1da177e4 LT |
407 | { |
408 | int type; | |
409 | int val; | |
410 | ||
411 | if (chset->midi_mode != SNDRV_MIDI_MODE_NONE) { | |
412 | type = (chan->control[MIDI_CTL_REGIST_PARM_NUM_MSB] << 8) | | |
413 | chan->control[MIDI_CTL_REGIST_PARM_NUM_LSB]; | |
414 | val = (chan->control[MIDI_CTL_MSB_DATA_ENTRY] << 7) | | |
415 | chan->control[MIDI_CTL_LSB_DATA_ENTRY]; | |
416 | ||
417 | switch (type) { | |
418 | case 0x0000: /* Pitch bend sensitivity */ | |
419 | /* MSB only / 1 semitone per 128 */ | |
420 | chan->gm_rpn_pitch_bend_range = val; | |
421 | break; | |
422 | ||
423 | case 0x0001: /* fine tuning: */ | |
424 | /* MSB/LSB, 8192=center, 100/8192 cent step */ | |
425 | chan->gm_rpn_fine_tuning = val - 8192; | |
426 | break; | |
427 | ||
428 | case 0x0002: /* coarse tuning */ | |
429 | /* MSB only / 8192=center, 1 semitone per 128 */ | |
430 | chan->gm_rpn_coarse_tuning = val - 8192; | |
431 | break; | |
432 | ||
433 | case 0x7F7F: /* "lock-in" RPN */ | |
434 | /* ignored */ | |
435 | break; | |
436 | } | |
437 | } | |
438 | /* should call nrpn or rpn callback here.. */ | |
439 | } | |
440 | ||
441 | /* | |
442 | * Process an nrpn message. | |
443 | */ | |
444 | static void | |
c7e0b5bf TI |
445 | nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan, |
446 | struct snd_midi_channel_set *chset) | |
1da177e4 LT |
447 | { |
448 | /* parse XG NRPNs here if possible */ | |
449 | if (ops->nrpn) | |
450 | ops->nrpn(drv, chan, chset); | |
451 | } | |
452 | ||
453 | ||
454 | /* | |
455 | * convert channel parameter in GS sysex | |
456 | */ | |
457 | static int | |
458 | get_channel(unsigned char cmd) | |
459 | { | |
460 | int p = cmd & 0x0f; | |
461 | if (p == 0) | |
462 | p = 9; | |
463 | else if (p < 10) | |
464 | p--; | |
465 | return p; | |
466 | } | |
467 | ||
468 | ||
469 | /* | |
470 | * Process a sysex message. | |
471 | */ | |
472 | static void | |
c7e0b5bf TI |
473 | sysex(struct snd_midi_op *ops, void *private, unsigned char *buf, int len, |
474 | struct snd_midi_channel_set *chset) | |
1da177e4 LT |
475 | { |
476 | /* GM on */ | |
477 | static unsigned char gm_on_macro[] = { | |
478 | 0x7e,0x7f,0x09,0x01, | |
479 | }; | |
480 | /* XG on */ | |
481 | static unsigned char xg_on_macro[] = { | |
482 | 0x43,0x10,0x4c,0x00,0x00,0x7e,0x00, | |
483 | }; | |
484 | /* GS prefix | |
485 | * drum channel: XX=0x1?(channel), YY=0x15, ZZ=on/off | |
486 | * reverb mode: XX=0x01, YY=0x30, ZZ=0-7 | |
487 | * chorus mode: XX=0x01, YY=0x38, ZZ=0-7 | |
488 | * master vol: XX=0x00, YY=0x04, ZZ=0-127 | |
489 | */ | |
490 | static unsigned char gs_pfx_macro[] = { | |
491 | 0x41,0x10,0x42,0x12,0x40,/*XX,YY,ZZ*/ | |
492 | }; | |
493 | ||
494 | int parsed = SNDRV_MIDI_SYSEX_NOT_PARSED; | |
495 | ||
496 | if (len <= 0 || buf[0] != 0xf0) | |
497 | return; | |
498 | /* skip first byte */ | |
499 | buf++; | |
500 | len--; | |
501 | ||
502 | /* GM on */ | |
503 | if (len >= (int)sizeof(gm_on_macro) && | |
504 | memcmp(buf, gm_on_macro, sizeof(gm_on_macro)) == 0) { | |
505 | if (chset->midi_mode != SNDRV_MIDI_MODE_GS && | |
506 | chset->midi_mode != SNDRV_MIDI_MODE_XG) { | |
507 | chset->midi_mode = SNDRV_MIDI_MODE_GM; | |
508 | reset_all_channels(chset); | |
509 | parsed = SNDRV_MIDI_SYSEX_GM_ON; | |
510 | } | |
511 | } | |
512 | ||
513 | /* GS macros */ | |
514 | else if (len >= 8 && | |
515 | memcmp(buf, gs_pfx_macro, sizeof(gs_pfx_macro)) == 0) { | |
516 | if (chset->midi_mode != SNDRV_MIDI_MODE_GS && | |
517 | chset->midi_mode != SNDRV_MIDI_MODE_XG) | |
518 | chset->midi_mode = SNDRV_MIDI_MODE_GS; | |
519 | ||
520 | if (buf[5] == 0x00 && buf[6] == 0x7f && buf[7] == 0x00) { | |
521 | /* GS reset */ | |
522 | parsed = SNDRV_MIDI_SYSEX_GS_RESET; | |
523 | reset_all_channels(chset); | |
524 | } | |
525 | ||
526 | else if ((buf[5] & 0xf0) == 0x10 && buf[6] == 0x15) { | |
527 | /* drum pattern */ | |
528 | int p = get_channel(buf[5]); | |
529 | if (p < chset->max_channels) { | |
530 | parsed = SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL; | |
531 | if (buf[7]) | |
532 | chset->channels[p].drum_channel = 1; | |
533 | else | |
534 | chset->channels[p].drum_channel = 0; | |
535 | } | |
536 | ||
537 | } else if ((buf[5] & 0xf0) == 0x10 && buf[6] == 0x21) { | |
538 | /* program */ | |
539 | int p = get_channel(buf[5]); | |
540 | if (p < chset->max_channels && | |
541 | ! chset->channels[p].drum_channel) { | |
542 | parsed = SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL; | |
543 | chset->channels[p].midi_program = buf[7]; | |
544 | } | |
545 | ||
546 | } else if (buf[5] == 0x01 && buf[6] == 0x30) { | |
547 | /* reverb mode */ | |
548 | parsed = SNDRV_MIDI_SYSEX_GS_REVERB_MODE; | |
549 | chset->gs_reverb_mode = buf[7]; | |
550 | ||
551 | } else if (buf[5] == 0x01 && buf[6] == 0x38) { | |
552 | /* chorus mode */ | |
553 | parsed = SNDRV_MIDI_SYSEX_GS_CHORUS_MODE; | |
554 | chset->gs_chorus_mode = buf[7]; | |
555 | ||
556 | } else if (buf[5] == 0x00 && buf[6] == 0x04) { | |
557 | /* master volume */ | |
558 | parsed = SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME; | |
559 | chset->gs_master_volume = buf[7]; | |
560 | ||
561 | } | |
562 | } | |
563 | ||
564 | /* XG on */ | |
565 | else if (len >= (int)sizeof(xg_on_macro) && | |
566 | memcmp(buf, xg_on_macro, sizeof(xg_on_macro)) == 0) { | |
567 | int i; | |
568 | chset->midi_mode = SNDRV_MIDI_MODE_XG; | |
569 | parsed = SNDRV_MIDI_SYSEX_XG_ON; | |
570 | /* reset CC#0 for drums */ | |
571 | for (i = 0; i < chset->max_channels; i++) { | |
572 | if (chset->channels[i].drum_channel) | |
573 | chset->channels[i].control[MIDI_CTL_MSB_BANK] = 127; | |
574 | else | |
575 | chset->channels[i].control[MIDI_CTL_MSB_BANK] = 0; | |
576 | } | |
577 | } | |
578 | ||
579 | if (ops->sysex) | |
580 | ops->sysex(private, buf - 1, len + 1, parsed, chset); | |
581 | } | |
582 | ||
583 | /* | |
584 | * all sound off | |
585 | */ | |
586 | static void | |
c7e0b5bf | 587 | all_sounds_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan) |
1da177e4 LT |
588 | { |
589 | int n; | |
590 | ||
591 | if (! ops->note_terminate) | |
592 | return; | |
593 | for (n = 0; n < 128; n++) { | |
594 | if (chan->note[n]) { | |
595 | ops->note_terminate(drv, n, chan); | |
596 | chan->note[n] = 0; | |
597 | } | |
598 | } | |
599 | } | |
600 | ||
601 | /* | |
602 | * all notes off | |
603 | */ | |
604 | static void | |
c7e0b5bf | 605 | all_notes_off(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan) |
1da177e4 LT |
606 | { |
607 | int n; | |
608 | ||
609 | if (! ops->note_off) | |
610 | return; | |
611 | for (n = 0; n < 128; n++) { | |
612 | if (chan->note[n] == SNDRV_MIDI_NOTE_ON) | |
613 | note_off(ops, drv, chan, n, 0); | |
614 | } | |
615 | } | |
616 | ||
617 | /* | |
618 | * Initialise a single midi channel control block. | |
619 | */ | |
c7e0b5bf | 620 | static void snd_midi_channel_init(struct snd_midi_channel *p, int n) |
1da177e4 LT |
621 | { |
622 | if (p == NULL) | |
623 | return; | |
624 | ||
c7e0b5bf | 625 | memset(p, 0, sizeof(struct snd_midi_channel)); |
1da177e4 LT |
626 | p->private = NULL; |
627 | p->number = n; | |
628 | ||
629 | snd_midi_reset_controllers(p); | |
630 | p->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ | |
631 | p->gm_rpn_fine_tuning = 0; | |
632 | p->gm_rpn_coarse_tuning = 0; | |
633 | ||
634 | if (n == 9) | |
635 | p->drum_channel = 1; /* Default ch 10 as drums */ | |
636 | } | |
637 | ||
638 | /* | |
639 | * Allocate and initialise a set of midi channel control blocks. | |
640 | */ | |
c7e0b5bf | 641 | static struct snd_midi_channel *snd_midi_channel_init_set(int n) |
1da177e4 | 642 | { |
c7e0b5bf | 643 | struct snd_midi_channel *chan; |
1da177e4 LT |
644 | int i; |
645 | ||
6da2ec56 | 646 | chan = kmalloc_array(n, sizeof(struct snd_midi_channel), GFP_KERNEL); |
1da177e4 LT |
647 | if (chan) { |
648 | for (i = 0; i < n; i++) | |
649 | snd_midi_channel_init(chan+i, i); | |
650 | } | |
651 | ||
652 | return chan; | |
653 | } | |
654 | ||
655 | /* | |
656 | * reset all midi channels | |
657 | */ | |
658 | static void | |
c7e0b5bf | 659 | reset_all_channels(struct snd_midi_channel_set *chset) |
1da177e4 LT |
660 | { |
661 | int ch; | |
662 | for (ch = 0; ch < chset->max_channels; ch++) { | |
c7e0b5bf | 663 | struct snd_midi_channel *chan = chset->channels + ch; |
1da177e4 LT |
664 | snd_midi_reset_controllers(chan); |
665 | chan->gm_rpn_pitch_bend_range = 256; /* 2 semitones */ | |
666 | chan->gm_rpn_fine_tuning = 0; | |
667 | chan->gm_rpn_coarse_tuning = 0; | |
668 | ||
669 | if (ch == 9) | |
670 | chan->drum_channel = 1; | |
671 | else | |
672 | chan->drum_channel = 0; | |
673 | } | |
674 | } | |
675 | ||
676 | ||
677 | /* | |
678 | * Allocate and initialise a midi channel set. | |
679 | */ | |
c7e0b5bf | 680 | struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n) |
1da177e4 | 681 | { |
c7e0b5bf | 682 | struct snd_midi_channel_set *chset; |
1da177e4 LT |
683 | |
684 | chset = kmalloc(sizeof(*chset), GFP_KERNEL); | |
685 | if (chset) { | |
686 | chset->channels = snd_midi_channel_init_set(n); | |
687 | chset->private_data = NULL; | |
688 | chset->max_channels = n; | |
689 | } | |
690 | return chset; | |
691 | } | |
9c8ddd10 | 692 | EXPORT_SYMBOL(snd_midi_channel_alloc_set); |
1da177e4 LT |
693 | |
694 | /* | |
695 | * Reset the midi controllers on a particular channel to default values. | |
696 | */ | |
c7e0b5bf | 697 | static void snd_midi_reset_controllers(struct snd_midi_channel *chan) |
1da177e4 LT |
698 | { |
699 | memset(chan->control, 0, sizeof(chan->control)); | |
700 | chan->gm_volume = 127; | |
701 | chan->gm_expression = 127; | |
702 | chan->gm_pan = 64; | |
703 | } | |
704 | ||
705 | ||
706 | /* | |
707 | * Free a midi channel set. | |
708 | */ | |
c7e0b5bf | 709 | void snd_midi_channel_free_set(struct snd_midi_channel_set *chset) |
1da177e4 LT |
710 | { |
711 | if (chset == NULL) | |
712 | return; | |
713 | kfree(chset->channels); | |
714 | kfree(chset); | |
715 | } | |
9c8ddd10 | 716 | EXPORT_SYMBOL(snd_midi_channel_free_set); |