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