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1da177e4 LT |
1 | /* |
2 | * MIDI byte <-> sequencer event coder | |
3 | * | |
4 | * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>, | |
5 | * Jaroslav Kysela <perex@suse.cz> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <sound/driver.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/string.h> | |
26 | #include <sound/core.h> | |
27 | #include <sound/seq_kernel.h> | |
28 | #include <sound/seq_midi_event.h> | |
29 | #include <sound/asoundef.h> | |
30 | ||
31 | MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>, Jaroslav Kysela <perex@suse.cz>"); | |
32 | MODULE_DESCRIPTION("MIDI byte <-> sequencer event coder"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | ||
35 | /* queue type */ | |
36 | /* from 0 to 7 are normal commands (note off, on, etc.) */ | |
37 | #define ST_NOTEOFF 0 | |
38 | #define ST_NOTEON 1 | |
39 | #define ST_SPECIAL 8 | |
40 | #define ST_SYSEX ST_SPECIAL | |
41 | /* from 8 to 15 are events for 0xf0-0xf7 */ | |
42 | ||
43 | ||
44 | /* status event types */ | |
45 | typedef void (*event_encode_t)(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
46 | typedef void (*event_decode_t)(snd_seq_event_t *ev, unsigned char *buf); | |
47 | ||
48 | /* | |
49 | * prototypes | |
50 | */ | |
51 | static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
52 | static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
53 | static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
54 | static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
55 | static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
56 | static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev); | |
57 | static void note_decode(snd_seq_event_t *ev, unsigned char *buf); | |
58 | static void one_param_decode(snd_seq_event_t *ev, unsigned char *buf); | |
59 | static void pitchbend_decode(snd_seq_event_t *ev, unsigned char *buf); | |
60 | static void two_param_decode(snd_seq_event_t *ev, unsigned char *buf); | |
61 | static void songpos_decode(snd_seq_event_t *ev, unsigned char *buf); | |
62 | ||
63 | /* | |
64 | * event list | |
65 | */ | |
66 | static struct status_event_list_t { | |
67 | int event; | |
68 | int qlen; | |
69 | event_encode_t encode; | |
70 | event_decode_t decode; | |
71 | } status_event[] = { | |
72 | /* 0x80 - 0xf0 */ | |
73 | {SNDRV_SEQ_EVENT_NOTEOFF, 2, note_event, note_decode}, | |
74 | {SNDRV_SEQ_EVENT_NOTEON, 2, note_event, note_decode}, | |
75 | {SNDRV_SEQ_EVENT_KEYPRESS, 2, note_event, note_decode}, | |
76 | {SNDRV_SEQ_EVENT_CONTROLLER, 2, two_param_ctrl_event, two_param_decode}, | |
77 | {SNDRV_SEQ_EVENT_PGMCHANGE, 1, one_param_ctrl_event, one_param_decode}, | |
78 | {SNDRV_SEQ_EVENT_CHANPRESS, 1, one_param_ctrl_event, one_param_decode}, | |
79 | {SNDRV_SEQ_EVENT_PITCHBEND, 2, pitchbend_ctrl_event, pitchbend_decode}, | |
80 | {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf0 */ | |
81 | /* 0xf0 - 0xff */ | |
82 | {SNDRV_SEQ_EVENT_SYSEX, 1, NULL, NULL}, /* sysex: 0xf0 */ | |
83 | {SNDRV_SEQ_EVENT_QFRAME, 1, one_param_event, one_param_decode}, /* 0xf1 */ | |
84 | {SNDRV_SEQ_EVENT_SONGPOS, 2, songpos_event, songpos_decode}, /* 0xf2 */ | |
85 | {SNDRV_SEQ_EVENT_SONGSEL, 1, one_param_event, one_param_decode}, /* 0xf3 */ | |
86 | {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf4 */ | |
87 | {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf5 */ | |
88 | {SNDRV_SEQ_EVENT_TUNE_REQUEST, 0, NULL, NULL}, /* 0xf6 */ | |
89 | {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf7 */ | |
90 | {SNDRV_SEQ_EVENT_CLOCK, 0, NULL, NULL}, /* 0xf8 */ | |
91 | {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf9 */ | |
92 | {SNDRV_SEQ_EVENT_START, 0, NULL, NULL}, /* 0xfa */ | |
93 | {SNDRV_SEQ_EVENT_CONTINUE, 0, NULL, NULL}, /* 0xfb */ | |
94 | {SNDRV_SEQ_EVENT_STOP, 0, NULL, NULL}, /* 0xfc */ | |
95 | {SNDRV_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xfd */ | |
96 | {SNDRV_SEQ_EVENT_SENSING, 0, NULL, NULL}, /* 0xfe */ | |
97 | {SNDRV_SEQ_EVENT_RESET, 0, NULL, NULL}, /* 0xff */ | |
98 | }; | |
99 | ||
100 | static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int len, snd_seq_event_t *ev); | |
101 | static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, snd_seq_event_t *ev); | |
102 | ||
103 | static struct extra_event_list_t { | |
104 | int event; | |
105 | int (*decode)(snd_midi_event_t *dev, unsigned char *buf, int len, snd_seq_event_t *ev); | |
106 | } extra_event[] = { | |
107 | {SNDRV_SEQ_EVENT_CONTROL14, extra_decode_ctrl14}, | |
108 | {SNDRV_SEQ_EVENT_NONREGPARAM, extra_decode_xrpn}, | |
109 | {SNDRV_SEQ_EVENT_REGPARAM, extra_decode_xrpn}, | |
110 | }; | |
111 | ||
112 | /* | |
113 | * new/delete record | |
114 | */ | |
115 | ||
116 | int snd_midi_event_new(int bufsize, snd_midi_event_t **rdev) | |
117 | { | |
118 | snd_midi_event_t *dev; | |
119 | ||
120 | *rdev = NULL; | |
121 | dev = kcalloc(1, sizeof(*dev), GFP_KERNEL); | |
122 | if (dev == NULL) | |
123 | return -ENOMEM; | |
124 | if (bufsize > 0) { | |
125 | dev->buf = kmalloc(bufsize, GFP_KERNEL); | |
126 | if (dev->buf == NULL) { | |
127 | kfree(dev); | |
128 | return -ENOMEM; | |
129 | } | |
130 | } | |
131 | dev->bufsize = bufsize; | |
132 | dev->lastcmd = 0xff; | |
133 | spin_lock_init(&dev->lock); | |
134 | *rdev = dev; | |
135 | return 0; | |
136 | } | |
137 | ||
138 | void snd_midi_event_free(snd_midi_event_t *dev) | |
139 | { | |
140 | if (dev != NULL) { | |
141 | kfree(dev->buf); | |
142 | kfree(dev); | |
143 | } | |
144 | } | |
145 | ||
146 | /* | |
147 | * initialize record | |
148 | */ | |
149 | inline static void reset_encode(snd_midi_event_t *dev) | |
150 | { | |
151 | dev->read = 0; | |
152 | dev->qlen = 0; | |
153 | dev->type = 0; | |
154 | } | |
155 | ||
156 | void snd_midi_event_reset_encode(snd_midi_event_t *dev) | |
157 | { | |
158 | unsigned long flags; | |
159 | ||
160 | spin_lock_irqsave(&dev->lock, flags); | |
161 | reset_encode(dev); | |
162 | spin_unlock_irqrestore(&dev->lock, flags); | |
163 | } | |
164 | ||
165 | void snd_midi_event_reset_decode(snd_midi_event_t *dev) | |
166 | { | |
167 | unsigned long flags; | |
168 | ||
169 | spin_lock_irqsave(&dev->lock, flags); | |
170 | dev->lastcmd = 0xff; | |
171 | spin_unlock_irqrestore(&dev->lock, flags); | |
172 | } | |
173 | ||
174 | void snd_midi_event_init(snd_midi_event_t *dev) | |
175 | { | |
176 | snd_midi_event_reset_encode(dev); | |
177 | snd_midi_event_reset_decode(dev); | |
178 | } | |
179 | ||
180 | void snd_midi_event_no_status(snd_midi_event_t *dev, int on) | |
181 | { | |
182 | dev->nostat = on ? 1 : 0; | |
183 | } | |
184 | ||
185 | /* | |
186 | * resize buffer | |
187 | */ | |
188 | int snd_midi_event_resize_buffer(snd_midi_event_t *dev, int bufsize) | |
189 | { | |
190 | unsigned char *new_buf, *old_buf; | |
191 | unsigned long flags; | |
192 | ||
193 | if (bufsize == dev->bufsize) | |
194 | return 0; | |
195 | new_buf = kmalloc(bufsize, GFP_KERNEL); | |
196 | if (new_buf == NULL) | |
197 | return -ENOMEM; | |
198 | spin_lock_irqsave(&dev->lock, flags); | |
199 | old_buf = dev->buf; | |
200 | dev->buf = new_buf; | |
201 | dev->bufsize = bufsize; | |
202 | reset_encode(dev); | |
203 | spin_unlock_irqrestore(&dev->lock, flags); | |
204 | kfree(old_buf); | |
205 | return 0; | |
206 | } | |
207 | ||
208 | /* | |
209 | * read bytes and encode to sequencer event if finished | |
210 | * return the size of encoded bytes | |
211 | */ | |
212 | long snd_midi_event_encode(snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev) | |
213 | { | |
214 | long result = 0; | |
215 | int rc; | |
216 | ||
217 | ev->type = SNDRV_SEQ_EVENT_NONE; | |
218 | ||
219 | while (count-- > 0) { | |
220 | rc = snd_midi_event_encode_byte(dev, *buf++, ev); | |
221 | result++; | |
222 | if (rc < 0) | |
223 | return rc; | |
224 | else if (rc > 0) | |
225 | return result; | |
226 | } | |
227 | ||
228 | return result; | |
229 | } | |
230 | ||
231 | /* | |
232 | * read one byte and encode to sequencer event: | |
233 | * return 1 if MIDI bytes are encoded to an event | |
234 | * 0 data is not finished | |
235 | * negative for error | |
236 | */ | |
237 | int snd_midi_event_encode_byte(snd_midi_event_t *dev, int c, snd_seq_event_t *ev) | |
238 | { | |
239 | int rc = 0; | |
240 | unsigned long flags; | |
241 | ||
242 | c &= 0xff; | |
243 | ||
244 | if (c >= MIDI_CMD_COMMON_CLOCK) { | |
245 | /* real-time event */ | |
246 | ev->type = status_event[ST_SPECIAL + c - 0xf0].event; | |
247 | ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK; | |
248 | ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED; | |
249 | return 1; | |
250 | } | |
251 | ||
252 | spin_lock_irqsave(&dev->lock, flags); | |
253 | if (dev->qlen > 0) { | |
254 | /* rest of command */ | |
255 | dev->buf[dev->read++] = c; | |
256 | if (dev->type != ST_SYSEX) | |
257 | dev->qlen--; | |
258 | } else { | |
259 | /* new command */ | |
260 | dev->read = 1; | |
261 | if (c & 0x80) { | |
262 | dev->buf[0] = c; | |
263 | if ((c & 0xf0) == 0xf0) /* special events */ | |
264 | dev->type = (c & 0x0f) + ST_SPECIAL; | |
265 | else | |
266 | dev->type = (c >> 4) & 0x07; | |
267 | dev->qlen = status_event[dev->type].qlen; | |
268 | } else { | |
269 | /* process this byte as argument */ | |
270 | dev->buf[dev->read++] = c; | |
271 | dev->qlen = status_event[dev->type].qlen - 1; | |
272 | } | |
273 | } | |
274 | if (dev->qlen == 0) { | |
275 | ev->type = status_event[dev->type].event; | |
276 | ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK; | |
277 | ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED; | |
278 | if (status_event[dev->type].encode) /* set data values */ | |
279 | status_event[dev->type].encode(dev, ev); | |
280 | rc = 1; | |
281 | } else if (dev->type == ST_SYSEX) { | |
282 | if (c == MIDI_CMD_COMMON_SYSEX_END || | |
283 | dev->read >= dev->bufsize) { | |
284 | ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK; | |
285 | ev->flags |= SNDRV_SEQ_EVENT_LENGTH_VARIABLE; | |
286 | ev->type = SNDRV_SEQ_EVENT_SYSEX; | |
287 | ev->data.ext.len = dev->read; | |
288 | ev->data.ext.ptr = dev->buf; | |
289 | if (c != MIDI_CMD_COMMON_SYSEX_END) | |
290 | dev->read = 0; /* continue to parse */ | |
291 | else | |
292 | reset_encode(dev); /* all parsed */ | |
293 | rc = 1; | |
294 | } | |
295 | } | |
296 | ||
297 | spin_unlock_irqrestore(&dev->lock, flags); | |
298 | return rc; | |
299 | } | |
300 | ||
301 | /* encode note event */ | |
302 | static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev) | |
303 | { | |
304 | ev->data.note.channel = dev->buf[0] & 0x0f; | |
305 | ev->data.note.note = dev->buf[1]; | |
306 | ev->data.note.velocity = dev->buf[2]; | |
307 | } | |
308 | ||
309 | /* encode one parameter controls */ | |
310 | static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev) | |
311 | { | |
312 | ev->data.control.channel = dev->buf[0] & 0x0f; | |
313 | ev->data.control.value = dev->buf[1]; | |
314 | } | |
315 | ||
316 | /* encode pitch wheel change */ | |
317 | static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev) | |
318 | { | |
319 | ev->data.control.channel = dev->buf[0] & 0x0f; | |
320 | ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1] - 8192; | |
321 | } | |
322 | ||
323 | /* encode midi control change */ | |
324 | static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev) | |
325 | { | |
326 | ev->data.control.channel = dev->buf[0] & 0x0f; | |
327 | ev->data.control.param = dev->buf[1]; | |
328 | ev->data.control.value = dev->buf[2]; | |
329 | } | |
330 | ||
331 | /* encode one parameter value*/ | |
332 | static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev) | |
333 | { | |
334 | ev->data.control.value = dev->buf[1]; | |
335 | } | |
336 | ||
337 | /* encode song position */ | |
338 | static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev) | |
339 | { | |
340 | ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1]; | |
341 | } | |
342 | ||
343 | /* | |
344 | * decode from a sequencer event to midi bytes | |
345 | * return the size of decoded midi events | |
346 | */ | |
347 | long snd_midi_event_decode(snd_midi_event_t *dev, unsigned char *buf, long count, snd_seq_event_t *ev) | |
348 | { | |
349 | unsigned int cmd, type; | |
350 | ||
351 | if (ev->type == SNDRV_SEQ_EVENT_NONE) | |
352 | return -ENOENT; | |
353 | ||
354 | for (type = 0; type < ARRAY_SIZE(status_event); type++) { | |
355 | if (ev->type == status_event[type].event) | |
356 | goto __found; | |
357 | } | |
358 | for (type = 0; type < ARRAY_SIZE(extra_event); type++) { | |
359 | if (ev->type == extra_event[type].event) | |
360 | return extra_event[type].decode(dev, buf, count, ev); | |
361 | } | |
362 | return -ENOENT; | |
363 | ||
364 | __found: | |
365 | if (type >= ST_SPECIAL) | |
366 | cmd = 0xf0 + (type - ST_SPECIAL); | |
367 | else | |
368 | /* data.note.channel and data.control.channel is identical */ | |
369 | cmd = 0x80 | (type << 4) | (ev->data.note.channel & 0x0f); | |
370 | ||
371 | ||
372 | if (cmd == MIDI_CMD_COMMON_SYSEX) { | |
373 | snd_midi_event_reset_decode(dev); | |
374 | return snd_seq_expand_var_event(ev, count, buf, 1, 0); | |
375 | } else { | |
376 | int qlen; | |
377 | unsigned char xbuf[4]; | |
378 | unsigned long flags; | |
379 | ||
380 | spin_lock_irqsave(&dev->lock, flags); | |
381 | if ((cmd & 0xf0) == 0xf0 || dev->lastcmd != cmd || dev->nostat) { | |
382 | dev->lastcmd = cmd; | |
383 | spin_unlock_irqrestore(&dev->lock, flags); | |
384 | xbuf[0] = cmd; | |
385 | if (status_event[type].decode) | |
386 | status_event[type].decode(ev, xbuf + 1); | |
387 | qlen = status_event[type].qlen + 1; | |
388 | } else { | |
389 | spin_unlock_irqrestore(&dev->lock, flags); | |
390 | if (status_event[type].decode) | |
391 | status_event[type].decode(ev, xbuf + 0); | |
392 | qlen = status_event[type].qlen; | |
393 | } | |
394 | if (count < qlen) | |
395 | return -ENOMEM; | |
396 | memcpy(buf, xbuf, qlen); | |
397 | return qlen; | |
398 | } | |
399 | } | |
400 | ||
401 | ||
402 | /* decode note event */ | |
403 | static void note_decode(snd_seq_event_t *ev, unsigned char *buf) | |
404 | { | |
405 | buf[0] = ev->data.note.note & 0x7f; | |
406 | buf[1] = ev->data.note.velocity & 0x7f; | |
407 | } | |
408 | ||
409 | /* decode one parameter controls */ | |
410 | static void one_param_decode(snd_seq_event_t *ev, unsigned char *buf) | |
411 | { | |
412 | buf[0] = ev->data.control.value & 0x7f; | |
413 | } | |
414 | ||
415 | /* decode pitch wheel change */ | |
416 | static void pitchbend_decode(snd_seq_event_t *ev, unsigned char *buf) | |
417 | { | |
418 | int value = ev->data.control.value + 8192; | |
419 | buf[0] = value & 0x7f; | |
420 | buf[1] = (value >> 7) & 0x7f; | |
421 | } | |
422 | ||
423 | /* decode midi control change */ | |
424 | static void two_param_decode(snd_seq_event_t *ev, unsigned char *buf) | |
425 | { | |
426 | buf[0] = ev->data.control.param & 0x7f; | |
427 | buf[1] = ev->data.control.value & 0x7f; | |
428 | } | |
429 | ||
430 | /* decode song position */ | |
431 | static void songpos_decode(snd_seq_event_t *ev, unsigned char *buf) | |
432 | { | |
433 | buf[0] = ev->data.control.value & 0x7f; | |
434 | buf[1] = (ev->data.control.value >> 7) & 0x7f; | |
435 | } | |
436 | ||
437 | /* decode 14bit control */ | |
438 | static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int count, snd_seq_event_t *ev) | |
439 | { | |
440 | unsigned char cmd; | |
441 | int idx = 0; | |
442 | ||
443 | cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f); | |
444 | if (ev->data.control.param < 0x20) { | |
445 | if (count < 4) | |
446 | return -ENOMEM; | |
447 | if (dev->nostat && count < 6) | |
448 | return -ENOMEM; | |
449 | if (cmd != dev->lastcmd || dev->nostat) { | |
450 | if (count < 5) | |
451 | return -ENOMEM; | |
452 | buf[idx++] = dev->lastcmd = cmd; | |
453 | } | |
454 | buf[idx++] = ev->data.control.param; | |
455 | buf[idx++] = (ev->data.control.value >> 7) & 0x7f; | |
456 | if (dev->nostat) | |
457 | buf[idx++] = cmd; | |
458 | buf[idx++] = ev->data.control.param + 0x20; | |
459 | buf[idx++] = ev->data.control.value & 0x7f; | |
460 | } else { | |
461 | if (count < 2) | |
462 | return -ENOMEM; | |
463 | if (cmd != dev->lastcmd || dev->nostat) { | |
464 | if (count < 3) | |
465 | return -ENOMEM; | |
466 | buf[idx++] = dev->lastcmd = cmd; | |
467 | } | |
468 | buf[idx++] = ev->data.control.param & 0x7f; | |
469 | buf[idx++] = ev->data.control.value & 0x7f; | |
470 | } | |
471 | return idx; | |
472 | } | |
473 | ||
474 | /* decode reg/nonreg param */ | |
475 | static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, snd_seq_event_t *ev) | |
476 | { | |
477 | unsigned char cmd; | |
478 | char *cbytes; | |
479 | static char cbytes_nrpn[4] = { MIDI_CTL_NONREG_PARM_NUM_MSB, | |
480 | MIDI_CTL_NONREG_PARM_NUM_LSB, | |
481 | MIDI_CTL_MSB_DATA_ENTRY, | |
482 | MIDI_CTL_LSB_DATA_ENTRY }; | |
483 | static char cbytes_rpn[4] = { MIDI_CTL_REGIST_PARM_NUM_MSB, | |
484 | MIDI_CTL_REGIST_PARM_NUM_LSB, | |
485 | MIDI_CTL_MSB_DATA_ENTRY, | |
486 | MIDI_CTL_LSB_DATA_ENTRY }; | |
487 | unsigned char bytes[4]; | |
488 | int idx = 0, i; | |
489 | ||
490 | if (count < 8) | |
491 | return -ENOMEM; | |
492 | if (dev->nostat && count < 12) | |
493 | return -ENOMEM; | |
494 | cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f); | |
495 | bytes[0] = ev->data.control.param & 0x007f; | |
496 | bytes[1] = (ev->data.control.param & 0x3f80) >> 7; | |
497 | bytes[2] = ev->data.control.value & 0x007f; | |
498 | bytes[3] = (ev->data.control.value & 0x3f80) >> 7; | |
499 | if (cmd != dev->lastcmd && !dev->nostat) { | |
500 | if (count < 9) | |
501 | return -ENOMEM; | |
502 | buf[idx++] = dev->lastcmd = cmd; | |
503 | } | |
504 | cbytes = ev->type == SNDRV_SEQ_EVENT_NONREGPARAM ? cbytes_nrpn : cbytes_rpn; | |
505 | for (i = 0; i < 4; i++) { | |
506 | if (dev->nostat) | |
507 | buf[idx++] = dev->lastcmd = cmd; | |
508 | buf[idx++] = cbytes[i]; | |
509 | buf[idx++] = bytes[i]; | |
510 | } | |
511 | return idx; | |
512 | } | |
513 | ||
514 | /* | |
515 | * exports | |
516 | */ | |
517 | ||
518 | EXPORT_SYMBOL(snd_midi_event_new); | |
519 | EXPORT_SYMBOL(snd_midi_event_free); | |
520 | EXPORT_SYMBOL(snd_midi_event_resize_buffer); | |
521 | EXPORT_SYMBOL(snd_midi_event_init); | |
522 | EXPORT_SYMBOL(snd_midi_event_reset_encode); | |
523 | EXPORT_SYMBOL(snd_midi_event_reset_decode); | |
524 | EXPORT_SYMBOL(snd_midi_event_no_status); | |
525 | EXPORT_SYMBOL(snd_midi_event_encode); | |
526 | EXPORT_SYMBOL(snd_midi_event_encode_byte); | |
527 | EXPORT_SYMBOL(snd_midi_event_decode); | |
528 | ||
529 | static int __init alsa_seq_midi_event_init(void) | |
530 | { | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static void __exit alsa_seq_midi_event_exit(void) | |
535 | { | |
536 | } | |
537 | ||
538 | module_init(alsa_seq_midi_event_init) | |
539 | module_exit(alsa_seq_midi_event_exit) |