Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * Abramo Bagnara <abramo@alsa-project.org> | |
5 | * | |
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 | ||
23 | #include <sound/driver.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/time.h> | |
26 | #include <sound/core.h> | |
27 | #include <sound/control.h> | |
28 | #include <sound/info.h> | |
29 | #include <sound/pcm.h> | |
30 | #include <sound/pcm_params.h> | |
31 | #include <sound/timer.h> | |
32 | ||
33 | /* | |
34 | * fill ring buffer with silence | |
35 | * runtime->silence_start: starting pointer to silence area | |
36 | * runtime->silence_filled: size filled with silence | |
37 | * runtime->silence_threshold: threshold from application | |
38 | * runtime->silence_size: maximal size from application | |
39 | * | |
40 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
41 | */ | |
877211f5 | 42 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 43 | { |
877211f5 | 44 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
45 | snd_pcm_uframes_t frames, ofs, transfer; |
46 | ||
47 | if (runtime->silence_size < runtime->boundary) { | |
48 | snd_pcm_sframes_t noise_dist, n; | |
49 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
50 | n = runtime->control->appl_ptr - runtime->silence_start; | |
51 | if (n < 0) | |
52 | n += runtime->boundary; | |
53 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
54 | runtime->silence_filled -= n; | |
55 | else | |
56 | runtime->silence_filled = 0; | |
57 | runtime->silence_start = runtime->control->appl_ptr; | |
58 | } | |
235475cb | 59 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 60 | return; |
1da177e4 LT |
61 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
62 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
63 | return; | |
64 | frames = runtime->silence_threshold - noise_dist; | |
65 | if (frames > runtime->silence_size) | |
66 | frames = runtime->silence_size; | |
67 | } else { | |
68 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
69 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
70 | runtime->silence_filled = avail > 0 ? avail : 0; | |
71 | runtime->silence_start = (runtime->status->hw_ptr + | |
72 | runtime->silence_filled) % | |
73 | runtime->boundary; | |
74 | } else { | |
75 | ofs = runtime->status->hw_ptr; | |
76 | frames = new_hw_ptr - ofs; | |
77 | if ((snd_pcm_sframes_t)frames < 0) | |
78 | frames += runtime->boundary; | |
79 | runtime->silence_filled -= frames; | |
80 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
81 | runtime->silence_filled = 0; | |
82 | runtime->silence_start = (ofs + frames) - runtime->buffer_size; | |
83 | } else { | |
84 | runtime->silence_start = ofs - runtime->silence_filled; | |
85 | } | |
86 | if ((snd_pcm_sframes_t)runtime->silence_start < 0) | |
87 | runtime->silence_start += runtime->boundary; | |
88 | } | |
89 | frames = runtime->buffer_size - runtime->silence_filled; | |
90 | } | |
91 | snd_assert(frames <= runtime->buffer_size, return); | |
92 | if (frames == 0) | |
93 | return; | |
94 | ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size; | |
95 | while (frames > 0) { | |
96 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
97 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
98 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
99 | if (substream->ops->silence) { | |
100 | int err; | |
101 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
102 | snd_assert(err >= 0, ); | |
103 | } else { | |
104 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
105 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
106 | } | |
107 | } else { | |
108 | unsigned int c; | |
109 | unsigned int channels = runtime->channels; | |
110 | if (substream->ops->silence) { | |
111 | for (c = 0; c < channels; ++c) { | |
112 | int err; | |
113 | err = substream->ops->silence(substream, c, ofs, transfer); | |
114 | snd_assert(err >= 0, ); | |
115 | } | |
116 | } else { | |
117 | size_t dma_csize = runtime->dma_bytes / channels; | |
118 | for (c = 0; c < channels; ++c) { | |
119 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
120 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
121 | } | |
122 | } | |
123 | } | |
124 | runtime->silence_filled += transfer; | |
125 | frames -= transfer; | |
126 | ofs = 0; | |
127 | } | |
128 | } | |
129 | ||
877211f5 | 130 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 LT |
131 | { |
132 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
133 | #ifdef CONFIG_SND_DEBUG | |
134 | if (substream->pstr->xrun_debug) { | |
135 | snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n", | |
136 | substream->pcm->card->number, | |
137 | substream->pcm->device, | |
138 | substream->stream ? 'c' : 'p'); | |
139 | if (substream->pstr->xrun_debug > 1) | |
140 | dump_stack(); | |
141 | } | |
142 | #endif | |
143 | } | |
144 | ||
877211f5 TI |
145 | static inline snd_pcm_uframes_t snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream, |
146 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
147 | { |
148 | snd_pcm_uframes_t pos; | |
149 | ||
150 | pos = substream->ops->pointer(substream); | |
151 | if (pos == SNDRV_PCM_POS_XRUN) | |
152 | return pos; /* XRUN */ | |
153 | if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) | |
07799e75 | 154 | getnstimeofday((struct timespec *)&runtime->status->tstamp); |
1da177e4 LT |
155 | #ifdef CONFIG_SND_DEBUG |
156 | if (pos >= runtime->buffer_size) { | |
157 | snd_printk(KERN_ERR "BUG: stream = %i, pos = 0x%lx, buffer size = 0x%lx, period size = 0x%lx\n", substream->stream, pos, runtime->buffer_size, runtime->period_size); | |
7c22f1aa | 158 | } |
1da177e4 | 159 | #endif |
1da177e4 LT |
160 | pos -= pos % runtime->min_align; |
161 | return pos; | |
162 | } | |
163 | ||
877211f5 TI |
164 | static inline int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream, |
165 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
166 | { |
167 | snd_pcm_uframes_t avail; | |
168 | ||
169 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
170 | avail = snd_pcm_playback_avail(runtime); | |
171 | else | |
172 | avail = snd_pcm_capture_avail(runtime); | |
173 | if (avail > runtime->avail_max) | |
174 | runtime->avail_max = avail; | |
175 | if (avail >= runtime->stop_threshold) { | |
176 | if (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING) | |
177 | snd_pcm_drain_done(substream); | |
178 | else | |
179 | xrun(substream); | |
180 | return -EPIPE; | |
181 | } | |
182 | if (avail >= runtime->control->avail_min) | |
183 | wake_up(&runtime->sleep); | |
184 | return 0; | |
185 | } | |
186 | ||
877211f5 | 187 | static inline int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream) |
1da177e4 | 188 | { |
877211f5 | 189 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
190 | snd_pcm_uframes_t pos; |
191 | snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt; | |
192 | snd_pcm_sframes_t delta; | |
193 | ||
194 | pos = snd_pcm_update_hw_ptr_pos(substream, runtime); | |
195 | if (pos == SNDRV_PCM_POS_XRUN) { | |
196 | xrun(substream); | |
197 | return -EPIPE; | |
198 | } | |
199 | if (runtime->period_size == runtime->buffer_size) | |
200 | goto __next_buf; | |
201 | new_hw_ptr = runtime->hw_ptr_base + pos; | |
202 | hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size; | |
203 | ||
204 | delta = hw_ptr_interrupt - new_hw_ptr; | |
205 | if (delta > 0) { | |
206 | if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) { | |
207 | #ifdef CONFIG_SND_DEBUG | |
208 | if (runtime->periods > 1 && substream->pstr->xrun_debug) { | |
209 | snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2); | |
210 | if (substream->pstr->xrun_debug > 1) | |
211 | dump_stack(); | |
212 | } | |
213 | #endif | |
214 | return 0; | |
215 | } | |
216 | __next_buf: | |
217 | runtime->hw_ptr_base += runtime->buffer_size; | |
218 | if (runtime->hw_ptr_base == runtime->boundary) | |
219 | runtime->hw_ptr_base = 0; | |
220 | new_hw_ptr = runtime->hw_ptr_base + pos; | |
221 | } | |
222 | ||
223 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
224 | runtime->silence_size > 0) | |
225 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
226 | ||
227 | runtime->status->hw_ptr = new_hw_ptr; | |
228 | runtime->hw_ptr_interrupt = new_hw_ptr - new_hw_ptr % runtime->period_size; | |
229 | ||
230 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
231 | } | |
232 | ||
233 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 234 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 235 | { |
877211f5 | 236 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
237 | snd_pcm_uframes_t pos; |
238 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr; | |
239 | snd_pcm_sframes_t delta; | |
240 | ||
241 | old_hw_ptr = runtime->status->hw_ptr; | |
242 | pos = snd_pcm_update_hw_ptr_pos(substream, runtime); | |
243 | if (pos == SNDRV_PCM_POS_XRUN) { | |
244 | xrun(substream); | |
245 | return -EPIPE; | |
246 | } | |
247 | new_hw_ptr = runtime->hw_ptr_base + pos; | |
248 | ||
249 | delta = old_hw_ptr - new_hw_ptr; | |
250 | if (delta > 0) { | |
251 | if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) { | |
252 | #ifdef CONFIG_SND_DEBUG | |
253 | if (runtime->periods > 2 && substream->pstr->xrun_debug) { | |
254 | snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2); | |
255 | if (substream->pstr->xrun_debug > 1) | |
256 | dump_stack(); | |
257 | } | |
258 | #endif | |
259 | return 0; | |
260 | } | |
261 | runtime->hw_ptr_base += runtime->buffer_size; | |
262 | if (runtime->hw_ptr_base == runtime->boundary) | |
263 | runtime->hw_ptr_base = 0; | |
264 | new_hw_ptr = runtime->hw_ptr_base + pos; | |
265 | } | |
266 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
267 | runtime->silence_size > 0) | |
268 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
269 | ||
270 | runtime->status->hw_ptr = new_hw_ptr; | |
271 | ||
272 | return snd_pcm_update_hw_ptr_post(substream, runtime); | |
273 | } | |
274 | ||
275 | /** | |
276 | * snd_pcm_set_ops - set the PCM operators | |
277 | * @pcm: the pcm instance | |
278 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
279 | * @ops: the operator table | |
280 | * | |
281 | * Sets the given PCM operators to the pcm instance. | |
282 | */ | |
877211f5 | 283 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 284 | { |
877211f5 TI |
285 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
286 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
287 | |
288 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
289 | substream->ops = ops; | |
290 | } | |
291 | ||
292 | ||
293 | /** | |
294 | * snd_pcm_sync - set the PCM sync id | |
295 | * @substream: the pcm substream | |
296 | * | |
297 | * Sets the PCM sync identifier for the card. | |
298 | */ | |
877211f5 | 299 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 300 | { |
877211f5 | 301 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
302 | |
303 | runtime->sync.id32[0] = substream->pcm->card->number; | |
304 | runtime->sync.id32[1] = -1; | |
305 | runtime->sync.id32[2] = -1; | |
306 | runtime->sync.id32[3] = -1; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Standard ioctl routine | |
311 | */ | |
312 | ||
313 | /* Code taken from alsa-lib */ | |
314 | #define assert(a) snd_assert((a), return -EINVAL) | |
315 | ||
316 | static inline unsigned int div32(unsigned int a, unsigned int b, | |
317 | unsigned int *r) | |
318 | { | |
319 | if (b == 0) { | |
320 | *r = 0; | |
321 | return UINT_MAX; | |
322 | } | |
323 | *r = a % b; | |
324 | return a / b; | |
325 | } | |
326 | ||
327 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
328 | { | |
329 | if (b == 0) | |
330 | return UINT_MAX; | |
331 | return a / b; | |
332 | } | |
333 | ||
334 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
335 | { | |
336 | unsigned int r; | |
337 | unsigned int q; | |
338 | if (b == 0) | |
339 | return UINT_MAX; | |
340 | q = div32(a, b, &r); | |
341 | if (r) | |
342 | ++q; | |
343 | return q; | |
344 | } | |
345 | ||
346 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
347 | { | |
348 | if (a == 0) | |
349 | return 0; | |
350 | if (div_down(UINT_MAX, a) < b) | |
351 | return UINT_MAX; | |
352 | return a * b; | |
353 | } | |
354 | ||
355 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
356 | unsigned int c, unsigned int *r) | |
357 | { | |
358 | u_int64_t n = (u_int64_t) a * b; | |
359 | if (c == 0) { | |
360 | snd_assert(n > 0, ); | |
361 | *r = 0; | |
362 | return UINT_MAX; | |
363 | } | |
364 | div64_32(&n, c, r); | |
365 | if (n >= UINT_MAX) { | |
366 | *r = 0; | |
367 | return UINT_MAX; | |
368 | } | |
369 | return n; | |
370 | } | |
371 | ||
877211f5 | 372 | static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) |
1da177e4 LT |
373 | { |
374 | int changed = 0; | |
375 | assert(!snd_interval_empty(i)); | |
376 | if (i->min < min) { | |
377 | i->min = min; | |
378 | i->openmin = openmin; | |
379 | changed = 1; | |
380 | } else if (i->min == min && !i->openmin && openmin) { | |
381 | i->openmin = 1; | |
382 | changed = 1; | |
383 | } | |
384 | if (i->integer) { | |
385 | if (i->openmin) { | |
386 | i->min++; | |
387 | i->openmin = 0; | |
388 | } | |
389 | } | |
390 | if (snd_interval_checkempty(i)) { | |
391 | snd_interval_none(i); | |
392 | return -EINVAL; | |
393 | } | |
394 | return changed; | |
395 | } | |
396 | ||
877211f5 | 397 | static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) |
1da177e4 LT |
398 | { |
399 | int changed = 0; | |
400 | assert(!snd_interval_empty(i)); | |
401 | if (i->max > max) { | |
402 | i->max = max; | |
403 | i->openmax = openmax; | |
404 | changed = 1; | |
405 | } else if (i->max == max && !i->openmax && openmax) { | |
406 | i->openmax = 1; | |
407 | changed = 1; | |
408 | } | |
409 | if (i->integer) { | |
410 | if (i->openmax) { | |
411 | i->max--; | |
412 | i->openmax = 0; | |
413 | } | |
414 | } | |
415 | if (snd_interval_checkempty(i)) { | |
416 | snd_interval_none(i); | |
417 | return -EINVAL; | |
418 | } | |
419 | return changed; | |
420 | } | |
421 | ||
422 | /** | |
423 | * snd_interval_refine - refine the interval value of configurator | |
424 | * @i: the interval value to refine | |
425 | * @v: the interval value to refer to | |
426 | * | |
427 | * Refines the interval value with the reference value. | |
428 | * The interval is changed to the range satisfying both intervals. | |
429 | * The interval status (min, max, integer, etc.) are evaluated. | |
430 | * | |
431 | * Returns non-zero if the value is changed, zero if not changed. | |
432 | */ | |
877211f5 | 433 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
434 | { |
435 | int changed = 0; | |
436 | assert(!snd_interval_empty(i)); | |
437 | if (i->min < v->min) { | |
438 | i->min = v->min; | |
439 | i->openmin = v->openmin; | |
440 | changed = 1; | |
441 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
442 | i->openmin = 1; | |
443 | changed = 1; | |
444 | } | |
445 | if (i->max > v->max) { | |
446 | i->max = v->max; | |
447 | i->openmax = v->openmax; | |
448 | changed = 1; | |
449 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
450 | i->openmax = 1; | |
451 | changed = 1; | |
452 | } | |
453 | if (!i->integer && v->integer) { | |
454 | i->integer = 1; | |
455 | changed = 1; | |
456 | } | |
457 | if (i->integer) { | |
458 | if (i->openmin) { | |
459 | i->min++; | |
460 | i->openmin = 0; | |
461 | } | |
462 | if (i->openmax) { | |
463 | i->max--; | |
464 | i->openmax = 0; | |
465 | } | |
466 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
467 | i->integer = 1; | |
468 | if (snd_interval_checkempty(i)) { | |
469 | snd_interval_none(i); | |
470 | return -EINVAL; | |
471 | } | |
472 | return changed; | |
473 | } | |
474 | ||
877211f5 | 475 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 LT |
476 | { |
477 | assert(!snd_interval_empty(i)); | |
478 | if (snd_interval_single(i)) | |
479 | return 0; | |
480 | i->max = i->min; | |
481 | i->openmax = i->openmin; | |
482 | if (i->openmax) | |
483 | i->max++; | |
484 | return 1; | |
485 | } | |
486 | ||
877211f5 | 487 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 LT |
488 | { |
489 | assert(!snd_interval_empty(i)); | |
490 | if (snd_interval_single(i)) | |
491 | return 0; | |
492 | i->min = i->max; | |
493 | i->openmin = i->openmax; | |
494 | if (i->openmin) | |
495 | i->min--; | |
496 | return 1; | |
497 | } | |
498 | ||
877211f5 | 499 | static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) |
1da177e4 | 500 | { |
877211f5 | 501 | struct snd_interval t; |
1da177e4 LT |
502 | t.empty = 0; |
503 | t.min = t.max = val; | |
504 | t.openmin = t.openmax = 0; | |
505 | t.integer = 1; | |
506 | return snd_interval_refine(i, &t); | |
507 | } | |
508 | ||
877211f5 | 509 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
510 | { |
511 | if (a->empty || b->empty) { | |
512 | snd_interval_none(c); | |
513 | return; | |
514 | } | |
515 | c->empty = 0; | |
516 | c->min = mul(a->min, b->min); | |
517 | c->openmin = (a->openmin || b->openmin); | |
518 | c->max = mul(a->max, b->max); | |
519 | c->openmax = (a->openmax || b->openmax); | |
520 | c->integer = (a->integer && b->integer); | |
521 | } | |
522 | ||
523 | /** | |
524 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
525 | * @a: dividend |
526 | * @b: divisor | |
527 | * @c: quotient | |
1da177e4 LT |
528 | * |
529 | * c = a / b | |
530 | * | |
531 | * Returns non-zero if the value is changed, zero if not changed. | |
532 | */ | |
877211f5 | 533 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
534 | { |
535 | unsigned int r; | |
536 | if (a->empty || b->empty) { | |
537 | snd_interval_none(c); | |
538 | return; | |
539 | } | |
540 | c->empty = 0; | |
541 | c->min = div32(a->min, b->max, &r); | |
542 | c->openmin = (r || a->openmin || b->openmax); | |
543 | if (b->min > 0) { | |
544 | c->max = div32(a->max, b->min, &r); | |
545 | if (r) { | |
546 | c->max++; | |
547 | c->openmax = 1; | |
548 | } else | |
549 | c->openmax = (a->openmax || b->openmin); | |
550 | } else { | |
551 | c->max = UINT_MAX; | |
552 | c->openmax = 0; | |
553 | } | |
554 | c->integer = 0; | |
555 | } | |
556 | ||
557 | /** | |
558 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
559 | * @a: dividend 1 |
560 | * @b: dividend 2 | |
561 | * @k: divisor (as integer) | |
562 | * @c: result | |
563 | * | |
1da177e4 LT |
564 | * c = a * b / k |
565 | * | |
566 | * Returns non-zero if the value is changed, zero if not changed. | |
567 | */ | |
877211f5 TI |
568 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
569 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
570 | { |
571 | unsigned int r; | |
572 | if (a->empty || b->empty) { | |
573 | snd_interval_none(c); | |
574 | return; | |
575 | } | |
576 | c->empty = 0; | |
577 | c->min = muldiv32(a->min, b->min, k, &r); | |
578 | c->openmin = (r || a->openmin || b->openmin); | |
579 | c->max = muldiv32(a->max, b->max, k, &r); | |
580 | if (r) { | |
581 | c->max++; | |
582 | c->openmax = 1; | |
583 | } else | |
584 | c->openmax = (a->openmax || b->openmax); | |
585 | c->integer = 0; | |
586 | } | |
587 | ||
588 | /** | |
589 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
590 | * @a: dividend 1 |
591 | * @k: dividend 2 (as integer) | |
592 | * @b: divisor | |
593 | * @c: result | |
1da177e4 LT |
594 | * |
595 | * c = a * k / b | |
596 | * | |
597 | * Returns non-zero if the value is changed, zero if not changed. | |
598 | */ | |
877211f5 TI |
599 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
600 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
601 | { |
602 | unsigned int r; | |
603 | if (a->empty || b->empty) { | |
604 | snd_interval_none(c); | |
605 | return; | |
606 | } | |
607 | c->empty = 0; | |
608 | c->min = muldiv32(a->min, k, b->max, &r); | |
609 | c->openmin = (r || a->openmin || b->openmax); | |
610 | if (b->min > 0) { | |
611 | c->max = muldiv32(a->max, k, b->min, &r); | |
612 | if (r) { | |
613 | c->max++; | |
614 | c->openmax = 1; | |
615 | } else | |
616 | c->openmax = (a->openmax || b->openmin); | |
617 | } else { | |
618 | c->max = UINT_MAX; | |
619 | c->openmax = 0; | |
620 | } | |
621 | c->integer = 0; | |
622 | } | |
623 | ||
624 | #undef assert | |
625 | /* ---- */ | |
626 | ||
627 | ||
628 | /** | |
629 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
630 | * @i: interval to refine |
631 | * @rats_count: number of ratnum_t | |
632 | * @rats: ratnum_t array | |
633 | * @nump: pointer to store the resultant numerator | |
634 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
635 | * |
636 | * Returns non-zero if the value is changed, zero if not changed. | |
637 | */ | |
877211f5 TI |
638 | int snd_interval_ratnum(struct snd_interval *i, |
639 | unsigned int rats_count, struct snd_ratnum *rats, | |
640 | unsigned int *nump, unsigned int *denp) | |
1da177e4 LT |
641 | { |
642 | unsigned int best_num, best_diff, best_den; | |
643 | unsigned int k; | |
877211f5 | 644 | struct snd_interval t; |
1da177e4 LT |
645 | int err; |
646 | ||
647 | best_num = best_den = best_diff = 0; | |
648 | for (k = 0; k < rats_count; ++k) { | |
649 | unsigned int num = rats[k].num; | |
650 | unsigned int den; | |
651 | unsigned int q = i->min; | |
652 | int diff; | |
653 | if (q == 0) | |
654 | q = 1; | |
655 | den = div_down(num, q); | |
656 | if (den < rats[k].den_min) | |
657 | continue; | |
658 | if (den > rats[k].den_max) | |
659 | den = rats[k].den_max; | |
660 | else { | |
661 | unsigned int r; | |
662 | r = (den - rats[k].den_min) % rats[k].den_step; | |
663 | if (r != 0) | |
664 | den -= r; | |
665 | } | |
666 | diff = num - q * den; | |
667 | if (best_num == 0 || | |
668 | diff * best_den < best_diff * den) { | |
669 | best_diff = diff; | |
670 | best_den = den; | |
671 | best_num = num; | |
672 | } | |
673 | } | |
674 | if (best_den == 0) { | |
675 | i->empty = 1; | |
676 | return -EINVAL; | |
677 | } | |
678 | t.min = div_down(best_num, best_den); | |
679 | t.openmin = !!(best_num % best_den); | |
680 | ||
681 | best_num = best_den = best_diff = 0; | |
682 | for (k = 0; k < rats_count; ++k) { | |
683 | unsigned int num = rats[k].num; | |
684 | unsigned int den; | |
685 | unsigned int q = i->max; | |
686 | int diff; | |
687 | if (q == 0) { | |
688 | i->empty = 1; | |
689 | return -EINVAL; | |
690 | } | |
691 | den = div_up(num, q); | |
692 | if (den > rats[k].den_max) | |
693 | continue; | |
694 | if (den < rats[k].den_min) | |
695 | den = rats[k].den_min; | |
696 | else { | |
697 | unsigned int r; | |
698 | r = (den - rats[k].den_min) % rats[k].den_step; | |
699 | if (r != 0) | |
700 | den += rats[k].den_step - r; | |
701 | } | |
702 | diff = q * den - num; | |
703 | if (best_num == 0 || | |
704 | diff * best_den < best_diff * den) { | |
705 | best_diff = diff; | |
706 | best_den = den; | |
707 | best_num = num; | |
708 | } | |
709 | } | |
710 | if (best_den == 0) { | |
711 | i->empty = 1; | |
712 | return -EINVAL; | |
713 | } | |
714 | t.max = div_up(best_num, best_den); | |
715 | t.openmax = !!(best_num % best_den); | |
716 | t.integer = 0; | |
717 | err = snd_interval_refine(i, &t); | |
718 | if (err < 0) | |
719 | return err; | |
720 | ||
721 | if (snd_interval_single(i)) { | |
722 | if (nump) | |
723 | *nump = best_num; | |
724 | if (denp) | |
725 | *denp = best_den; | |
726 | } | |
727 | return err; | |
728 | } | |
729 | ||
730 | /** | |
731 | * snd_interval_ratden - refine the interval value | |
df8db936 | 732 | * @i: interval to refine |
877211f5 TI |
733 | * @rats_count: number of struct ratden |
734 | * @rats: struct ratden array | |
df8db936 TI |
735 | * @nump: pointer to store the resultant numerator |
736 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
737 | * |
738 | * Returns non-zero if the value is changed, zero if not changed. | |
739 | */ | |
877211f5 TI |
740 | static int snd_interval_ratden(struct snd_interval *i, |
741 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
742 | unsigned int *nump, unsigned int *denp) |
743 | { | |
744 | unsigned int best_num, best_diff, best_den; | |
745 | unsigned int k; | |
877211f5 | 746 | struct snd_interval t; |
1da177e4 LT |
747 | int err; |
748 | ||
749 | best_num = best_den = best_diff = 0; | |
750 | for (k = 0; k < rats_count; ++k) { | |
751 | unsigned int num; | |
752 | unsigned int den = rats[k].den; | |
753 | unsigned int q = i->min; | |
754 | int diff; | |
755 | num = mul(q, den); | |
756 | if (num > rats[k].num_max) | |
757 | continue; | |
758 | if (num < rats[k].num_min) | |
759 | num = rats[k].num_max; | |
760 | else { | |
761 | unsigned int r; | |
762 | r = (num - rats[k].num_min) % rats[k].num_step; | |
763 | if (r != 0) | |
764 | num += rats[k].num_step - r; | |
765 | } | |
766 | diff = num - q * den; | |
767 | if (best_num == 0 || | |
768 | diff * best_den < best_diff * den) { | |
769 | best_diff = diff; | |
770 | best_den = den; | |
771 | best_num = num; | |
772 | } | |
773 | } | |
774 | if (best_den == 0) { | |
775 | i->empty = 1; | |
776 | return -EINVAL; | |
777 | } | |
778 | t.min = div_down(best_num, best_den); | |
779 | t.openmin = !!(best_num % best_den); | |
780 | ||
781 | best_num = best_den = best_diff = 0; | |
782 | for (k = 0; k < rats_count; ++k) { | |
783 | unsigned int num; | |
784 | unsigned int den = rats[k].den; | |
785 | unsigned int q = i->max; | |
786 | int diff; | |
787 | num = mul(q, den); | |
788 | if (num < rats[k].num_min) | |
789 | continue; | |
790 | if (num > rats[k].num_max) | |
791 | num = rats[k].num_max; | |
792 | else { | |
793 | unsigned int r; | |
794 | r = (num - rats[k].num_min) % rats[k].num_step; | |
795 | if (r != 0) | |
796 | num -= r; | |
797 | } | |
798 | diff = q * den - num; | |
799 | if (best_num == 0 || | |
800 | diff * best_den < best_diff * den) { | |
801 | best_diff = diff; | |
802 | best_den = den; | |
803 | best_num = num; | |
804 | } | |
805 | } | |
806 | if (best_den == 0) { | |
807 | i->empty = 1; | |
808 | return -EINVAL; | |
809 | } | |
810 | t.max = div_up(best_num, best_den); | |
811 | t.openmax = !!(best_num % best_den); | |
812 | t.integer = 0; | |
813 | err = snd_interval_refine(i, &t); | |
814 | if (err < 0) | |
815 | return err; | |
816 | ||
817 | if (snd_interval_single(i)) { | |
818 | if (nump) | |
819 | *nump = best_num; | |
820 | if (denp) | |
821 | *denp = best_den; | |
822 | } | |
823 | return err; | |
824 | } | |
825 | ||
826 | /** | |
827 | * snd_interval_list - refine the interval value from the list | |
828 | * @i: the interval value to refine | |
829 | * @count: the number of elements in the list | |
830 | * @list: the value list | |
831 | * @mask: the bit-mask to evaluate | |
832 | * | |
833 | * Refines the interval value from the list. | |
834 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
835 | * evaluated. | |
836 | * | |
837 | * Returns non-zero if the value is changed, zero if not changed. | |
838 | */ | |
877211f5 | 839 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
840 | { |
841 | unsigned int k; | |
842 | int changed = 0; | |
843 | for (k = 0; k < count; k++) { | |
844 | if (mask && !(mask & (1 << k))) | |
845 | continue; | |
846 | if (i->min == list[k] && !i->openmin) | |
847 | goto _l1; | |
848 | if (i->min < list[k]) { | |
849 | i->min = list[k]; | |
850 | i->openmin = 0; | |
851 | changed = 1; | |
852 | goto _l1; | |
853 | } | |
854 | } | |
855 | i->empty = 1; | |
856 | return -EINVAL; | |
857 | _l1: | |
858 | for (k = count; k-- > 0;) { | |
859 | if (mask && !(mask & (1 << k))) | |
860 | continue; | |
861 | if (i->max == list[k] && !i->openmax) | |
862 | goto _l2; | |
863 | if (i->max > list[k]) { | |
864 | i->max = list[k]; | |
865 | i->openmax = 0; | |
866 | changed = 1; | |
867 | goto _l2; | |
868 | } | |
869 | } | |
870 | i->empty = 1; | |
871 | return -EINVAL; | |
872 | _l2: | |
873 | if (snd_interval_checkempty(i)) { | |
874 | i->empty = 1; | |
875 | return -EINVAL; | |
876 | } | |
877 | return changed; | |
878 | } | |
879 | ||
877211f5 | 880 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
881 | { |
882 | unsigned int n; | |
883 | int changed = 0; | |
884 | n = (i->min - min) % step; | |
885 | if (n != 0 || i->openmin) { | |
886 | i->min += step - n; | |
887 | changed = 1; | |
888 | } | |
889 | n = (i->max - min) % step; | |
890 | if (n != 0 || i->openmax) { | |
891 | i->max -= n; | |
892 | changed = 1; | |
893 | } | |
894 | if (snd_interval_checkempty(i)) { | |
895 | i->empty = 1; | |
896 | return -EINVAL; | |
897 | } | |
898 | return changed; | |
899 | } | |
900 | ||
901 | /* Info constraints helpers */ | |
902 | ||
903 | /** | |
904 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
905 | * @runtime: the pcm runtime instance | |
906 | * @cond: condition bits | |
907 | * @var: the variable to evaluate | |
908 | * @func: the evaluation function | |
909 | * @private: the private data pointer passed to function | |
910 | * @dep: the dependent variables | |
911 | * | |
912 | * Returns zero if successful, or a negative error code on failure. | |
913 | */ | |
877211f5 | 914 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
915 | int var, |
916 | snd_pcm_hw_rule_func_t func, void *private, | |
917 | int dep, ...) | |
918 | { | |
877211f5 TI |
919 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
920 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
921 | unsigned int k; |
922 | va_list args; | |
923 | va_start(args, dep); | |
924 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 925 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
926 | unsigned int new_rules = constrs->rules_all + 16; |
927 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
928 | if (!new) | |
929 | return -ENOMEM; | |
930 | if (constrs->rules) { | |
931 | memcpy(new, constrs->rules, | |
932 | constrs->rules_num * sizeof(*c)); | |
933 | kfree(constrs->rules); | |
934 | } | |
935 | constrs->rules = new; | |
936 | constrs->rules_all = new_rules; | |
937 | } | |
938 | c = &constrs->rules[constrs->rules_num]; | |
939 | c->cond = cond; | |
940 | c->func = func; | |
941 | c->var = var; | |
942 | c->private = private; | |
943 | k = 0; | |
944 | while (1) { | |
945 | snd_assert(k < ARRAY_SIZE(c->deps), return -EINVAL); | |
946 | c->deps[k++] = dep; | |
947 | if (dep < 0) | |
948 | break; | |
949 | dep = va_arg(args, int); | |
950 | } | |
951 | constrs->rules_num++; | |
952 | va_end(args); | |
953 | return 0; | |
954 | } | |
955 | ||
956 | /** | |
957 | * snd_pcm_hw_constraint_mask | |
df8db936 TI |
958 | * @runtime: PCM runtime instance |
959 | * @var: hw_params variable to apply the mask | |
960 | * @mask: the bitmap mask | |
961 | * | |
962 | * Apply the constraint of the given bitmap mask to a mask parameter. | |
1da177e4 | 963 | */ |
877211f5 | 964 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
965 | u_int32_t mask) |
966 | { | |
877211f5 TI |
967 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
968 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
969 | *maskp->bits &= mask; |
970 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
971 | if (*maskp->bits == 0) | |
972 | return -EINVAL; | |
973 | return 0; | |
974 | } | |
975 | ||
976 | /** | |
977 | * snd_pcm_hw_constraint_mask64 | |
df8db936 TI |
978 | * @runtime: PCM runtime instance |
979 | * @var: hw_params variable to apply the mask | |
980 | * @mask: the 64bit bitmap mask | |
981 | * | |
982 | * Apply the constraint of the given bitmap mask to a mask parameter. | |
1da177e4 | 983 | */ |
877211f5 | 984 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
985 | u_int64_t mask) |
986 | { | |
877211f5 TI |
987 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
988 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
989 | maskp->bits[0] &= (u_int32_t)mask; |
990 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
991 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
992 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
993 | return -EINVAL; | |
994 | return 0; | |
995 | } | |
996 | ||
997 | /** | |
998 | * snd_pcm_hw_constraint_integer | |
df8db936 TI |
999 | * @runtime: PCM runtime instance |
1000 | * @var: hw_params variable to apply the integer constraint | |
1001 | * | |
1002 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1003 | */ |
877211f5 | 1004 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1005 | { |
877211f5 | 1006 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1007 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1008 | } | |
1009 | ||
1010 | /** | |
1011 | * snd_pcm_hw_constraint_minmax | |
df8db936 TI |
1012 | * @runtime: PCM runtime instance |
1013 | * @var: hw_params variable to apply the range | |
1014 | * @min: the minimal value | |
1015 | * @max: the maximal value | |
1016 | * | |
1017 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1018 | */ |
877211f5 | 1019 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1020 | unsigned int min, unsigned int max) |
1021 | { | |
877211f5 TI |
1022 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1023 | struct snd_interval t; | |
1da177e4 LT |
1024 | t.min = min; |
1025 | t.max = max; | |
1026 | t.openmin = t.openmax = 0; | |
1027 | t.integer = 0; | |
1028 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1029 | } | |
1030 | ||
877211f5 TI |
1031 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1032 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1033 | { |
877211f5 | 1034 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1035 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1036 | } | |
1037 | ||
1038 | ||
1039 | /** | |
1040 | * snd_pcm_hw_constraint_list | |
df8db936 TI |
1041 | * @runtime: PCM runtime instance |
1042 | * @cond: condition bits | |
1043 | * @var: hw_params variable to apply the list constraint | |
1044 | * @l: list | |
1045 | * | |
1046 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1047 | */ |
877211f5 | 1048 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1049 | unsigned int cond, |
1050 | snd_pcm_hw_param_t var, | |
877211f5 | 1051 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1052 | { |
1053 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1054 | snd_pcm_hw_rule_list, l, | |
1055 | var, -1); | |
1056 | } | |
1057 | ||
877211f5 TI |
1058 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1059 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1060 | { |
877211f5 | 1061 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1062 | unsigned int num = 0, den = 0; |
1063 | int err; | |
1064 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1065 | r->nrats, r->rats, &num, &den); | |
1066 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1067 | params->rate_num = num; | |
1068 | params->rate_den = den; | |
1069 | } | |
1070 | return err; | |
1071 | } | |
1072 | ||
1073 | /** | |
1074 | * snd_pcm_hw_constraint_ratnums | |
df8db936 TI |
1075 | * @runtime: PCM runtime instance |
1076 | * @cond: condition bits | |
1077 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1078 | * @r: struct snd_ratnums constriants |
1da177e4 | 1079 | */ |
877211f5 | 1080 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1081 | unsigned int cond, |
1082 | snd_pcm_hw_param_t var, | |
877211f5 | 1083 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1084 | { |
1085 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1086 | snd_pcm_hw_rule_ratnums, r, | |
1087 | var, -1); | |
1088 | } | |
1089 | ||
877211f5 TI |
1090 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1091 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1092 | { |
877211f5 | 1093 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1094 | unsigned int num = 0, den = 0; |
1095 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1096 | r->nrats, r->rats, &num, &den); | |
1097 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1098 | params->rate_num = num; | |
1099 | params->rate_den = den; | |
1100 | } | |
1101 | return err; | |
1102 | } | |
1103 | ||
1104 | /** | |
1105 | * snd_pcm_hw_constraint_ratdens | |
df8db936 TI |
1106 | * @runtime: PCM runtime instance |
1107 | * @cond: condition bits | |
1108 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1109 | * @r: struct snd_ratdens constriants |
1da177e4 | 1110 | */ |
877211f5 | 1111 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1112 | unsigned int cond, |
1113 | snd_pcm_hw_param_t var, | |
877211f5 | 1114 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1115 | { |
1116 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1117 | snd_pcm_hw_rule_ratdens, r, | |
1118 | var, -1); | |
1119 | } | |
1120 | ||
877211f5 TI |
1121 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1122 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1123 | { |
1124 | unsigned int l = (unsigned long) rule->private; | |
1125 | int width = l & 0xffff; | |
1126 | unsigned int msbits = l >> 16; | |
877211f5 | 1127 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1128 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1129 | params->msbits = msbits; | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | /** | |
1134 | * snd_pcm_hw_constraint_msbits | |
df8db936 TI |
1135 | * @runtime: PCM runtime instance |
1136 | * @cond: condition bits | |
1137 | * @width: sample bits width | |
1138 | * @msbits: msbits width | |
1da177e4 | 1139 | */ |
877211f5 | 1140 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1141 | unsigned int cond, |
1142 | unsigned int width, | |
1143 | unsigned int msbits) | |
1144 | { | |
1145 | unsigned long l = (msbits << 16) | width; | |
1146 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1147 | snd_pcm_hw_rule_msbits, | |
1148 | (void*) l, | |
1149 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1150 | } | |
1151 | ||
877211f5 TI |
1152 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1153 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1154 | { |
1155 | unsigned long step = (unsigned long) rule->private; | |
1156 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1157 | } | |
1158 | ||
1159 | /** | |
1160 | * snd_pcm_hw_constraint_step | |
df8db936 TI |
1161 | * @runtime: PCM runtime instance |
1162 | * @cond: condition bits | |
1163 | * @var: hw_params variable to apply the step constraint | |
1164 | * @step: step size | |
1da177e4 | 1165 | */ |
877211f5 | 1166 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1167 | unsigned int cond, |
1168 | snd_pcm_hw_param_t var, | |
1169 | unsigned long step) | |
1170 | { | |
1171 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1172 | snd_pcm_hw_rule_step, (void *) step, | |
1173 | var, -1); | |
1174 | } | |
1175 | ||
877211f5 | 1176 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 LT |
1177 | { |
1178 | static int pow2_sizes[] = { | |
1179 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, | |
1180 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1181 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1182 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1183 | }; | |
1184 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1185 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1186 | } | |
1187 | ||
1188 | /** | |
1189 | * snd_pcm_hw_constraint_pow2 | |
df8db936 TI |
1190 | * @runtime: PCM runtime instance |
1191 | * @cond: condition bits | |
1192 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1193 | */ |
877211f5 | 1194 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1195 | unsigned int cond, |
1196 | snd_pcm_hw_param_t var) | |
1197 | { | |
1198 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1199 | snd_pcm_hw_rule_pow2, NULL, | |
1200 | var, -1); | |
1201 | } | |
1202 | ||
1203 | /* To use the same code we have in alsa-lib */ | |
1da177e4 LT |
1204 | #define assert(i) snd_assert((i), return -EINVAL) |
1205 | #ifndef INT_MIN | |
1206 | #define INT_MIN ((int)((unsigned int)INT_MAX+1)) | |
1207 | #endif | |
1208 | ||
877211f5 | 1209 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1210 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1211 | { |
1212 | if (hw_is_mask(var)) { | |
1213 | snd_mask_any(hw_param_mask(params, var)); | |
1214 | params->cmask |= 1 << var; | |
1215 | params->rmask |= 1 << var; | |
1216 | return; | |
1217 | } | |
1218 | if (hw_is_interval(var)) { | |
1219 | snd_interval_any(hw_param_interval(params, var)); | |
1220 | params->cmask |= 1 << var; | |
1221 | params->rmask |= 1 << var; | |
1222 | return; | |
1223 | } | |
1224 | snd_BUG(); | |
1225 | } | |
1226 | ||
62144100 | 1227 | #if 0 |
df8db936 | 1228 | /* |
1da177e4 LT |
1229 | * snd_pcm_hw_param_any |
1230 | */ | |
877211f5 | 1231 | int snd_pcm_hw_param_any(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
1da177e4 LT |
1232 | snd_pcm_hw_param_t var) |
1233 | { | |
1234 | _snd_pcm_hw_param_any(params, var); | |
1235 | return snd_pcm_hw_refine(pcm, params); | |
1236 | } | |
123992f7 | 1237 | #endif /* 0 */ |
1da177e4 | 1238 | |
877211f5 | 1239 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1240 | { |
1241 | unsigned int k; | |
1242 | memset(params, 0, sizeof(*params)); | |
1243 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1244 | _snd_pcm_hw_param_any(params, k); | |
1245 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1246 | _snd_pcm_hw_param_any(params, k); | |
1247 | params->info = ~0U; | |
1248 | } | |
1249 | ||
62144100 | 1250 | #if 0 |
df8db936 | 1251 | /* |
1da177e4 LT |
1252 | * snd_pcm_hw_params_any |
1253 | * | |
1254 | * Fill PARAMS with full configuration space boundaries | |
1255 | */ | |
877211f5 | 1256 | int snd_pcm_hw_params_any(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params) |
1da177e4 LT |
1257 | { |
1258 | _snd_pcm_hw_params_any(params); | |
1259 | return snd_pcm_hw_refine(pcm, params); | |
1260 | } | |
123992f7 | 1261 | #endif /* 0 */ |
1da177e4 LT |
1262 | |
1263 | /** | |
1264 | * snd_pcm_hw_param_value | |
df8db936 TI |
1265 | * @params: the hw_params instance |
1266 | * @var: parameter to retrieve | |
1267 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1268 | * |
1269 | * Return the value for field PAR if it's fixed in configuration space | |
1270 | * defined by PARAMS. Return -EINVAL otherwise | |
1271 | */ | |
877211f5 | 1272 | static int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
123992f7 | 1273 | snd_pcm_hw_param_t var, int *dir) |
1da177e4 LT |
1274 | { |
1275 | if (hw_is_mask(var)) { | |
877211f5 | 1276 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1277 | if (!snd_mask_single(mask)) |
1278 | return -EINVAL; | |
1279 | if (dir) | |
1280 | *dir = 0; | |
1281 | return snd_mask_value(mask); | |
1282 | } | |
1283 | if (hw_is_interval(var)) { | |
877211f5 | 1284 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1285 | if (!snd_interval_single(i)) |
1286 | return -EINVAL; | |
1287 | if (dir) | |
1288 | *dir = i->openmin; | |
1289 | return snd_interval_value(i); | |
1290 | } | |
1291 | assert(0); | |
1292 | return -EINVAL; | |
1293 | } | |
1294 | ||
1295 | /** | |
1296 | * snd_pcm_hw_param_value_min | |
df8db936 TI |
1297 | * @params: the hw_params instance |
1298 | * @var: parameter to retrieve | |
1299 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1300 | * |
1301 | * Return the minimum value for field PAR. | |
1302 | */ | |
877211f5 | 1303 | unsigned int snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
1304 | snd_pcm_hw_param_t var, int *dir) |
1305 | { | |
1306 | if (hw_is_mask(var)) { | |
1307 | if (dir) | |
1308 | *dir = 0; | |
1309 | return snd_mask_min(hw_param_mask_c(params, var)); | |
1310 | } | |
1311 | if (hw_is_interval(var)) { | |
877211f5 | 1312 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1313 | if (dir) |
1314 | *dir = i->openmin; | |
1315 | return snd_interval_min(i); | |
1316 | } | |
1317 | assert(0); | |
1318 | return -EINVAL; | |
1319 | } | |
1320 | ||
1321 | /** | |
1322 | * snd_pcm_hw_param_value_max | |
df8db936 TI |
1323 | * @params: the hw_params instance |
1324 | * @var: parameter to retrieve | |
1325 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1326 | * |
1327 | * Return the maximum value for field PAR. | |
1328 | */ | |
877211f5 | 1329 | unsigned int snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, |
1da177e4 LT |
1330 | snd_pcm_hw_param_t var, int *dir) |
1331 | { | |
1332 | if (hw_is_mask(var)) { | |
1333 | if (dir) | |
1334 | *dir = 0; | |
1335 | return snd_mask_max(hw_param_mask_c(params, var)); | |
1336 | } | |
1337 | if (hw_is_interval(var)) { | |
877211f5 | 1338 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1339 | if (dir) |
1340 | *dir = - (int) i->openmax; | |
1341 | return snd_interval_max(i); | |
1342 | } | |
1343 | assert(0); | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | ||
877211f5 | 1347 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1348 | snd_pcm_hw_param_t var) |
1349 | { | |
1350 | if (hw_is_mask(var)) { | |
1351 | snd_mask_none(hw_param_mask(params, var)); | |
1352 | params->cmask |= 1 << var; | |
1353 | params->rmask |= 1 << var; | |
1354 | } else if (hw_is_interval(var)) { | |
1355 | snd_interval_none(hw_param_interval(params, var)); | |
1356 | params->cmask |= 1 << var; | |
1357 | params->rmask |= 1 << var; | |
1358 | } else { | |
1359 | snd_BUG(); | |
1360 | } | |
1361 | } | |
1362 | ||
877211f5 | 1363 | int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1364 | snd_pcm_hw_param_t var) |
1365 | { | |
1366 | int changed; | |
1367 | assert(hw_is_interval(var)); | |
1368 | changed = snd_interval_setinteger(hw_param_interval(params, var)); | |
1369 | if (changed) { | |
1370 | params->cmask |= 1 << var; | |
1371 | params->rmask |= 1 << var; | |
1372 | } | |
1373 | return changed; | |
1374 | } | |
1375 | ||
62144100 | 1376 | #if 0 |
df8db936 | 1377 | /* |
1da177e4 LT |
1378 | * snd_pcm_hw_param_setinteger |
1379 | * | |
1380 | * Inside configuration space defined by PARAMS remove from PAR all | |
1381 | * non integer values. Reduce configuration space accordingly. | |
1382 | * Return -EINVAL if the configuration space is empty | |
1383 | */ | |
877211f5 TI |
1384 | int snd_pcm_hw_param_setinteger(struct snd_pcm_substream *pcm, |
1385 | struct snd_pcm_hw_params *params, | |
1da177e4 LT |
1386 | snd_pcm_hw_param_t var) |
1387 | { | |
1388 | int changed = _snd_pcm_hw_param_setinteger(params, var); | |
1389 | if (changed < 0) | |
1390 | return changed; | |
1391 | if (params->rmask) { | |
1392 | int err = snd_pcm_hw_refine(pcm, params); | |
1393 | if (err < 0) | |
1394 | return err; | |
1395 | } | |
1396 | return 0; | |
1397 | } | |
123992f7 | 1398 | #endif /* 0 */ |
1da177e4 | 1399 | |
877211f5 | 1400 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1401 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1402 | { |
1403 | int changed; | |
1404 | if (hw_is_mask(var)) | |
1405 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1406 | else if (hw_is_interval(var)) | |
1407 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
1408 | else { | |
1409 | assert(0); | |
1410 | return -EINVAL; | |
1411 | } | |
1412 | if (changed) { | |
1413 | params->cmask |= 1 << var; | |
1414 | params->rmask |= 1 << var; | |
1415 | } | |
1416 | return changed; | |
1417 | } | |
1418 | ||
1419 | ||
1420 | /** | |
1421 | * snd_pcm_hw_param_first | |
df8db936 TI |
1422 | * @pcm: PCM instance |
1423 | * @params: the hw_params instance | |
1424 | * @var: parameter to retrieve | |
1425 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1426 | * |
1427 | * Inside configuration space defined by PARAMS remove from PAR all | |
1428 | * values > minimum. Reduce configuration space accordingly. | |
1429 | * Return the minimum. | |
1430 | */ | |
877211f5 TI |
1431 | static int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1432 | struct snd_pcm_hw_params *params, | |
123992f7 | 1433 | snd_pcm_hw_param_t var, int *dir) |
1da177e4 LT |
1434 | { |
1435 | int changed = _snd_pcm_hw_param_first(params, var); | |
1436 | if (changed < 0) | |
1437 | return changed; | |
1438 | if (params->rmask) { | |
1439 | int err = snd_pcm_hw_refine(pcm, params); | |
1440 | assert(err >= 0); | |
1441 | } | |
1442 | return snd_pcm_hw_param_value(params, var, dir); | |
1443 | } | |
1444 | ||
877211f5 | 1445 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1446 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1447 | { |
1448 | int changed; | |
1449 | if (hw_is_mask(var)) | |
1450 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1451 | else if (hw_is_interval(var)) | |
1452 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
1453 | else { | |
1454 | assert(0); | |
1455 | return -EINVAL; | |
1456 | } | |
1457 | if (changed) { | |
1458 | params->cmask |= 1 << var; | |
1459 | params->rmask |= 1 << var; | |
1460 | } | |
1461 | return changed; | |
1462 | } | |
1463 | ||
1464 | ||
1465 | /** | |
1466 | * snd_pcm_hw_param_last | |
df8db936 TI |
1467 | * @pcm: PCM instance |
1468 | * @params: the hw_params instance | |
1469 | * @var: parameter to retrieve | |
1470 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1471 | * |
1472 | * Inside configuration space defined by PARAMS remove from PAR all | |
1473 | * values < maximum. Reduce configuration space accordingly. | |
1474 | * Return the maximum. | |
1475 | */ | |
877211f5 TI |
1476 | static int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1477 | struct snd_pcm_hw_params *params, | |
123992f7 | 1478 | snd_pcm_hw_param_t var, int *dir) |
1da177e4 LT |
1479 | { |
1480 | int changed = _snd_pcm_hw_param_last(params, var); | |
1481 | if (changed < 0) | |
1482 | return changed; | |
1483 | if (params->rmask) { | |
1484 | int err = snd_pcm_hw_refine(pcm, params); | |
1485 | assert(err >= 0); | |
1486 | } | |
1487 | return snd_pcm_hw_param_value(params, var, dir); | |
1488 | } | |
1489 | ||
877211f5 | 1490 | int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1491 | snd_pcm_hw_param_t var, unsigned int val, int dir) |
1492 | { | |
1493 | int changed; | |
1494 | int open = 0; | |
1495 | if (dir) { | |
1496 | if (dir > 0) { | |
1497 | open = 1; | |
1498 | } else if (dir < 0) { | |
1499 | if (val > 0) { | |
1500 | open = 1; | |
1501 | val--; | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | if (hw_is_mask(var)) | |
1506 | changed = snd_mask_refine_min(hw_param_mask(params, var), val + !!open); | |
1507 | else if (hw_is_interval(var)) | |
1508 | changed = snd_interval_refine_min(hw_param_interval(params, var), val, open); | |
1509 | else { | |
1510 | assert(0); | |
1511 | return -EINVAL; | |
1512 | } | |
1513 | if (changed) { | |
1514 | params->cmask |= 1 << var; | |
1515 | params->rmask |= 1 << var; | |
1516 | } | |
1517 | return changed; | |
1518 | } | |
1519 | ||
1520 | /** | |
1521 | * snd_pcm_hw_param_min | |
df8db936 TI |
1522 | * @pcm: PCM instance |
1523 | * @params: the hw_params instance | |
1524 | * @var: parameter to retrieve | |
1525 | * @val: minimal value | |
1526 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1527 | * |
1528 | * Inside configuration space defined by PARAMS remove from PAR all | |
1529 | * values < VAL. Reduce configuration space accordingly. | |
1530 | * Return new minimum or -EINVAL if the configuration space is empty | |
1531 | */ | |
877211f5 | 1532 | static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
123992f7 AB |
1533 | snd_pcm_hw_param_t var, unsigned int val, |
1534 | int *dir) | |
1da177e4 LT |
1535 | { |
1536 | int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); | |
1537 | if (changed < 0) | |
1538 | return changed; | |
1539 | if (params->rmask) { | |
1540 | int err = snd_pcm_hw_refine(pcm, params); | |
1541 | if (err < 0) | |
1542 | return err; | |
1543 | } | |
1544 | return snd_pcm_hw_param_value_min(params, var, dir); | |
1545 | } | |
1546 | ||
877211f5 | 1547 | static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, |
123992f7 AB |
1548 | snd_pcm_hw_param_t var, unsigned int val, |
1549 | int dir) | |
1da177e4 LT |
1550 | { |
1551 | int changed; | |
1552 | int open = 0; | |
1553 | if (dir) { | |
1554 | if (dir < 0) { | |
1555 | open = 1; | |
1556 | } else if (dir > 0) { | |
1557 | open = 1; | |
1558 | val++; | |
1559 | } | |
1560 | } | |
1561 | if (hw_is_mask(var)) { | |
1562 | if (val == 0 && open) { | |
1563 | snd_mask_none(hw_param_mask(params, var)); | |
1564 | changed = -EINVAL; | |
1565 | } else | |
1566 | changed = snd_mask_refine_max(hw_param_mask(params, var), val - !!open); | |
1567 | } else if (hw_is_interval(var)) | |
1568 | changed = snd_interval_refine_max(hw_param_interval(params, var), val, open); | |
1569 | else { | |
1570 | assert(0); | |
1571 | return -EINVAL; | |
1572 | } | |
1573 | if (changed) { | |
1574 | params->cmask |= 1 << var; | |
1575 | params->rmask |= 1 << var; | |
1576 | } | |
1577 | return changed; | |
1578 | } | |
1579 | ||
1580 | /** | |
1581 | * snd_pcm_hw_param_max | |
df8db936 TI |
1582 | * @pcm: PCM instance |
1583 | * @params: the hw_params instance | |
1584 | * @var: parameter to retrieve | |
1585 | * @val: maximal value | |
1586 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1587 | * |
1588 | * Inside configuration space defined by PARAMS remove from PAR all | |
1589 | * values >= VAL + 1. Reduce configuration space accordingly. | |
1590 | * Return new maximum or -EINVAL if the configuration space is empty | |
1591 | */ | |
877211f5 | 1592 | static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
123992f7 AB |
1593 | snd_pcm_hw_param_t var, unsigned int val, |
1594 | int *dir) | |
1da177e4 LT |
1595 | { |
1596 | int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); | |
1597 | if (changed < 0) | |
1598 | return changed; | |
1599 | if (params->rmask) { | |
1600 | int err = snd_pcm_hw_refine(pcm, params); | |
1601 | if (err < 0) | |
1602 | return err; | |
1603 | } | |
1604 | return snd_pcm_hw_param_value_max(params, var, dir); | |
1605 | } | |
1606 | ||
877211f5 | 1607 | int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1608 | snd_pcm_hw_param_t var, unsigned int val, int dir) |
1609 | { | |
1610 | int changed; | |
1611 | if (hw_is_mask(var)) { | |
877211f5 | 1612 | struct snd_mask *m = hw_param_mask(params, var); |
1da177e4 LT |
1613 | if (val == 0 && dir < 0) { |
1614 | changed = -EINVAL; | |
1615 | snd_mask_none(m); | |
1616 | } else { | |
1617 | if (dir > 0) | |
1618 | val++; | |
1619 | else if (dir < 0) | |
1620 | val--; | |
1621 | changed = snd_mask_refine_set(hw_param_mask(params, var), val); | |
1622 | } | |
1623 | } else if (hw_is_interval(var)) { | |
877211f5 | 1624 | struct snd_interval *i = hw_param_interval(params, var); |
1da177e4 LT |
1625 | if (val == 0 && dir < 0) { |
1626 | changed = -EINVAL; | |
1627 | snd_interval_none(i); | |
1628 | } else if (dir == 0) | |
1629 | changed = snd_interval_refine_set(i, val); | |
1630 | else { | |
877211f5 | 1631 | struct snd_interval t; |
1da177e4 LT |
1632 | t.openmin = 1; |
1633 | t.openmax = 1; | |
1634 | t.empty = 0; | |
1635 | t.integer = 0; | |
1636 | if (dir < 0) { | |
1637 | t.min = val - 1; | |
1638 | t.max = val; | |
1639 | } else { | |
1640 | t.min = val; | |
1641 | t.max = val+1; | |
1642 | } | |
1643 | changed = snd_interval_refine(i, &t); | |
1644 | } | |
1645 | } else { | |
1646 | assert(0); | |
1647 | return -EINVAL; | |
1648 | } | |
1649 | if (changed) { | |
1650 | params->cmask |= 1 << var; | |
1651 | params->rmask |= 1 << var; | |
1652 | } | |
1653 | return changed; | |
1654 | } | |
1655 | ||
1656 | /** | |
1657 | * snd_pcm_hw_param_set | |
df8db936 TI |
1658 | * @pcm: PCM instance |
1659 | * @params: the hw_params instance | |
1660 | * @var: parameter to retrieve | |
1661 | * @val: value to set | |
1662 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1663 | * |
1664 | * Inside configuration space defined by PARAMS remove from PAR all | |
1665 | * values != VAL. Reduce configuration space accordingly. | |
1666 | * Return VAL or -EINVAL if the configuration space is empty | |
1667 | */ | |
877211f5 | 1668 | int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
1da177e4 LT |
1669 | snd_pcm_hw_param_t var, unsigned int val, int dir) |
1670 | { | |
1671 | int changed = _snd_pcm_hw_param_set(params, var, val, dir); | |
1672 | if (changed < 0) | |
1673 | return changed; | |
1674 | if (params->rmask) { | |
1675 | int err = snd_pcm_hw_refine(pcm, params); | |
1676 | if (err < 0) | |
1677 | return err; | |
1678 | } | |
1679 | return snd_pcm_hw_param_value(params, var, NULL); | |
1680 | } | |
1681 | ||
877211f5 TI |
1682 | static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, |
1683 | snd_pcm_hw_param_t var, const struct snd_mask *val) | |
1da177e4 LT |
1684 | { |
1685 | int changed; | |
1686 | assert(hw_is_mask(var)); | |
1687 | changed = snd_mask_refine(hw_param_mask(params, var), val); | |
1688 | if (changed) { | |
1689 | params->cmask |= 1 << var; | |
1690 | params->rmask |= 1 << var; | |
1691 | } | |
1692 | return changed; | |
1693 | } | |
1694 | ||
1695 | /** | |
1696 | * snd_pcm_hw_param_mask | |
df8db936 TI |
1697 | * @pcm: PCM instance |
1698 | * @params: the hw_params instance | |
1699 | * @var: parameter to retrieve | |
1700 | * @val: mask to apply | |
1da177e4 LT |
1701 | * |
1702 | * Inside configuration space defined by PARAMS remove from PAR all values | |
1703 | * not contained in MASK. Reduce configuration space accordingly. | |
1704 | * This function can be called only for SNDRV_PCM_HW_PARAM_ACCESS, | |
1705 | * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. | |
1706 | * Return 0 on success or -EINVAL | |
1707 | * if the configuration space is empty | |
1708 | */ | |
877211f5 TI |
1709 | int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
1710 | snd_pcm_hw_param_t var, const struct snd_mask *val) | |
1da177e4 LT |
1711 | { |
1712 | int changed = _snd_pcm_hw_param_mask(params, var, val); | |
1713 | if (changed < 0) | |
1714 | return changed; | |
1715 | if (params->rmask) { | |
1716 | int err = snd_pcm_hw_refine(pcm, params); | |
1717 | if (err < 0) | |
1718 | return err; | |
1719 | } | |
1720 | return 0; | |
1721 | } | |
1722 | ||
1723 | static int boundary_sub(int a, int adir, | |
1724 | int b, int bdir, | |
1725 | int *c, int *cdir) | |
1726 | { | |
1727 | adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); | |
1728 | bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); | |
1729 | *c = a - b; | |
1730 | *cdir = adir - bdir; | |
1731 | if (*cdir == -2) { | |
1732 | assert(*c > INT_MIN); | |
1733 | (*c)--; | |
1734 | } else if (*cdir == 2) { | |
1735 | assert(*c < INT_MAX); | |
1736 | (*c)++; | |
1737 | } | |
1738 | return 0; | |
1739 | } | |
1740 | ||
1741 | static int boundary_lt(unsigned int a, int adir, | |
1742 | unsigned int b, int bdir) | |
1743 | { | |
1744 | assert(a > 0 || adir >= 0); | |
1745 | assert(b > 0 || bdir >= 0); | |
1746 | if (adir < 0) { | |
1747 | a--; | |
1748 | adir = 1; | |
1749 | } else if (adir > 0) | |
1750 | adir = 1; | |
1751 | if (bdir < 0) { | |
1752 | b--; | |
1753 | bdir = 1; | |
1754 | } else if (bdir > 0) | |
1755 | bdir = 1; | |
1756 | return a < b || (a == b && adir < bdir); | |
1757 | } | |
1758 | ||
1759 | /* Return 1 if min is nearer to best than max */ | |
1760 | static int boundary_nearer(int min, int mindir, | |
1761 | int best, int bestdir, | |
1762 | int max, int maxdir) | |
1763 | { | |
1764 | int dmin, dmindir; | |
1765 | int dmax, dmaxdir; | |
1766 | boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); | |
1767 | boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); | |
1768 | return boundary_lt(dmin, dmindir, dmax, dmaxdir); | |
1769 | } | |
1770 | ||
1771 | /** | |
1772 | * snd_pcm_hw_param_near | |
df8db936 TI |
1773 | * @pcm: PCM instance |
1774 | * @params: the hw_params instance | |
1775 | * @var: parameter to retrieve | |
1776 | * @best: value to set | |
1777 | * @dir: pointer to the direction (-1,0,1) or NULL | |
1da177e4 LT |
1778 | * |
1779 | * Inside configuration space defined by PARAMS set PAR to the available value | |
1780 | * nearest to VAL. Reduce configuration space accordingly. | |
1781 | * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, | |
1782 | * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. | |
1783 | * Return the value found. | |
1784 | */ | |
877211f5 | 1785 | int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params, |
1da177e4 LT |
1786 | snd_pcm_hw_param_t var, unsigned int best, int *dir) |
1787 | { | |
877211f5 | 1788 | struct snd_pcm_hw_params *save = NULL; |
1da177e4 LT |
1789 | int v; |
1790 | unsigned int saved_min; | |
1791 | int last = 0; | |
1792 | int min, max; | |
1793 | int mindir, maxdir; | |
1794 | int valdir = dir ? *dir : 0; | |
1795 | /* FIXME */ | |
1796 | if (best > INT_MAX) | |
1797 | best = INT_MAX; | |
1798 | min = max = best; | |
1799 | mindir = maxdir = valdir; | |
1800 | if (maxdir > 0) | |
1801 | maxdir = 0; | |
1802 | else if (maxdir == 0) | |
1803 | maxdir = -1; | |
1804 | else { | |
1805 | maxdir = 1; | |
1806 | max--; | |
1807 | } | |
1808 | save = kmalloc(sizeof(*save), GFP_KERNEL); | |
1809 | if (save == NULL) | |
1810 | return -ENOMEM; | |
1811 | *save = *params; | |
1812 | saved_min = min; | |
1813 | min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); | |
1814 | if (min >= 0) { | |
877211f5 | 1815 | struct snd_pcm_hw_params *params1; |
1da177e4 LT |
1816 | if (max < 0) |
1817 | goto _end; | |
1818 | if ((unsigned int)min == saved_min && mindir == valdir) | |
1819 | goto _end; | |
1820 | params1 = kmalloc(sizeof(*params1), GFP_KERNEL); | |
1821 | if (params1 == NULL) { | |
1822 | kfree(save); | |
1823 | return -ENOMEM; | |
1824 | } | |
1825 | *params1 = *save; | |
1826 | max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); | |
1827 | if (max < 0) { | |
1828 | kfree(params1); | |
1829 | goto _end; | |
1830 | } | |
1831 | if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { | |
1832 | *params = *params1; | |
1833 | last = 1; | |
1834 | } | |
1835 | kfree(params1); | |
1836 | } else { | |
1837 | *params = *save; | |
1838 | max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); | |
1839 | assert(max >= 0); | |
1840 | last = 1; | |
1841 | } | |
1842 | _end: | |
1843 | kfree(save); | |
1844 | if (last) | |
1845 | v = snd_pcm_hw_param_last(pcm, params, var, dir); | |
1846 | else | |
1847 | v = snd_pcm_hw_param_first(pcm, params, var, dir); | |
1848 | assert(v >= 0); | |
1849 | return v; | |
1850 | } | |
1851 | ||
1852 | /** | |
1853 | * snd_pcm_hw_param_choose | |
df8db936 TI |
1854 | * @pcm: PCM instance |
1855 | * @params: the hw_params instance | |
1da177e4 LT |
1856 | * |
1857 | * Choose one configuration from configuration space defined by PARAMS | |
1858 | * The configuration chosen is that obtained fixing in this order: | |
1859 | * first access, first format, first subformat, min channels, | |
1860 | * min rate, min period time, max buffer size, min tick time | |
1861 | */ | |
877211f5 | 1862 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params) |
1da177e4 LT |
1863 | { |
1864 | int err; | |
1865 | ||
1866 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_ACCESS, NULL); | |
1867 | assert(err >= 0); | |
1868 | ||
1869 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_FORMAT, NULL); | |
1870 | assert(err >= 0); | |
1871 | ||
1872 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_SUBFORMAT, NULL); | |
1873 | assert(err >= 0); | |
1874 | ||
1875 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_CHANNELS, NULL); | |
1876 | assert(err >= 0); | |
1877 | ||
1878 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_RATE, NULL); | |
1879 | assert(err >= 0); | |
1880 | ||
1881 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_PERIOD_TIME, NULL); | |
1882 | assert(err >= 0); | |
1883 | ||
1884 | err = snd_pcm_hw_param_last(pcm, params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL); | |
1885 | assert(err >= 0); | |
1886 | ||
1887 | err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_TICK_TIME, NULL); | |
1888 | assert(err >= 0); | |
1889 | ||
1890 | return 0; | |
1891 | } | |
1892 | ||
1da177e4 LT |
1893 | #undef assert |
1894 | ||
877211f5 | 1895 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1896 | void *arg) |
1897 | { | |
877211f5 | 1898 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1899 | unsigned long flags; |
1900 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1901 | if (snd_pcm_running(substream) && | |
1902 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1903 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1904 | else | |
1905 | runtime->status->hw_ptr = 0; | |
1906 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1907 | return 0; | |
1908 | } | |
1909 | ||
877211f5 | 1910 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1911 | void *arg) |
1912 | { | |
877211f5 TI |
1913 | struct snd_pcm_channel_info *info = arg; |
1914 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1915 | int width; |
1916 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1917 | info->offset = -1; | |
1918 | return 0; | |
1919 | } | |
1920 | width = snd_pcm_format_physical_width(runtime->format); | |
1921 | if (width < 0) | |
1922 | return width; | |
1923 | info->offset = 0; | |
1924 | switch (runtime->access) { | |
1925 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1926 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1927 | info->first = info->channel * width; | |
1928 | info->step = runtime->channels * width; | |
1929 | break; | |
1930 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1931 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1932 | { | |
1933 | size_t size = runtime->dma_bytes / runtime->channels; | |
1934 | info->first = info->channel * size * 8; | |
1935 | info->step = width; | |
1936 | break; | |
1937 | } | |
1938 | default: | |
1939 | snd_BUG(); | |
1940 | break; | |
1941 | } | |
1942 | return 0; | |
1943 | } | |
1944 | ||
1945 | /** | |
1946 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1947 | * @substream: the pcm substream instance | |
1948 | * @cmd: ioctl command | |
1949 | * @arg: ioctl argument | |
1950 | * | |
1951 | * Processes the generic ioctl commands for PCM. | |
1952 | * Can be passed as the ioctl callback for PCM ops. | |
1953 | * | |
1954 | * Returns zero if successful, or a negative error code on failure. | |
1955 | */ | |
877211f5 | 1956 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1957 | unsigned int cmd, void *arg) |
1958 | { | |
1959 | switch (cmd) { | |
1960 | case SNDRV_PCM_IOCTL1_INFO: | |
1961 | return 0; | |
1962 | case SNDRV_PCM_IOCTL1_RESET: | |
1963 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1964 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1965 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
1966 | } | |
1967 | return -ENXIO; | |
1968 | } | |
1969 | ||
1970 | /* | |
1971 | * Conditions | |
1972 | */ | |
1973 | ||
877211f5 | 1974 | static void snd_pcm_system_tick_set(struct snd_pcm_substream *substream, |
1da177e4 LT |
1975 | unsigned long ticks) |
1976 | { | |
877211f5 | 1977 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1978 | if (ticks == 0) |
1979 | del_timer(&runtime->tick_timer); | |
1980 | else { | |
1981 | ticks += (1000000 / HZ) - 1; | |
1982 | ticks /= (1000000 / HZ); | |
1983 | mod_timer(&runtime->tick_timer, jiffies + ticks); | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | /* Temporary alias */ | |
877211f5 | 1988 | void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks) |
1da177e4 LT |
1989 | { |
1990 | snd_pcm_system_tick_set(substream, ticks); | |
1991 | } | |
1992 | ||
877211f5 | 1993 | void snd_pcm_tick_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 1994 | { |
877211f5 | 1995 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1996 | snd_pcm_uframes_t frames = ULONG_MAX; |
1997 | snd_pcm_uframes_t avail, dist; | |
1998 | unsigned int ticks; | |
1999 | u_int64_t n; | |
2000 | u_int32_t r; | |
2001 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
2002 | if (runtime->silence_size >= runtime->boundary) { | |
2003 | frames = 1; | |
2004 | } else if (runtime->silence_size > 0 && | |
2005 | runtime->silence_filled < runtime->buffer_size) { | |
2006 | snd_pcm_sframes_t noise_dist; | |
2007 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; | |
235475cb TI |
2008 | if (noise_dist > (snd_pcm_sframes_t)runtime->silence_threshold) |
2009 | frames = noise_dist - runtime->silence_threshold; | |
1da177e4 LT |
2010 | } |
2011 | avail = snd_pcm_playback_avail(runtime); | |
2012 | } else { | |
2013 | avail = snd_pcm_capture_avail(runtime); | |
2014 | } | |
2015 | if (avail < runtime->control->avail_min) { | |
2016 | snd_pcm_sframes_t n = runtime->control->avail_min - avail; | |
2017 | if (n > 0 && frames > (snd_pcm_uframes_t)n) | |
2018 | frames = n; | |
2019 | } | |
2020 | if (avail < runtime->buffer_size) { | |
2021 | snd_pcm_sframes_t n = runtime->buffer_size - avail; | |
2022 | if (n > 0 && frames > (snd_pcm_uframes_t)n) | |
2023 | frames = n; | |
2024 | } | |
2025 | if (frames == ULONG_MAX) { | |
2026 | snd_pcm_tick_set(substream, 0); | |
2027 | return; | |
2028 | } | |
2029 | dist = runtime->status->hw_ptr - runtime->hw_ptr_base; | |
2030 | /* Distance to next interrupt */ | |
2031 | dist = runtime->period_size - dist % runtime->period_size; | |
2032 | if (dist <= frames) { | |
2033 | snd_pcm_tick_set(substream, 0); | |
2034 | return; | |
2035 | } | |
2036 | /* the base time is us */ | |
2037 | n = frames; | |
2038 | n *= 1000000; | |
2039 | div64_32(&n, runtime->tick_time * runtime->rate, &r); | |
2040 | ticks = n + (r > 0 ? 1 : 0); | |
2041 | if (ticks < runtime->sleep_min) | |
2042 | ticks = runtime->sleep_min; | |
2043 | snd_pcm_tick_set(substream, (unsigned long) ticks); | |
2044 | } | |
2045 | ||
877211f5 | 2046 | void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 2047 | { |
877211f5 | 2048 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2049 | unsigned long flags; |
2050 | ||
2051 | snd_assert(substream != NULL, return); | |
2052 | runtime = substream->runtime; | |
2053 | snd_assert(runtime != NULL, return); | |
2054 | ||
2055 | snd_pcm_stream_lock_irqsave(substream, flags); | |
2056 | if (!snd_pcm_running(substream) || | |
2057 | snd_pcm_update_hw_ptr(substream) < 0) | |
2058 | goto _end; | |
2059 | if (runtime->sleep_min) | |
2060 | snd_pcm_tick_prepare(substream); | |
2061 | _end: | |
2062 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
2063 | } | |
2064 | ||
2065 | /** | |
2066 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
2067 | * @substream: the pcm substream instance | |
2068 | * | |
2069 | * This function is called from the interrupt handler when the | |
2070 | * PCM has processed the period size. It will update the current | |
2071 | * pointer, set up the tick, wake up sleepers, etc. | |
2072 | * | |
2073 | * Even if more than one periods have elapsed since the last call, you | |
2074 | * have to call this only once. | |
2075 | */ | |
877211f5 | 2076 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 2077 | { |
877211f5 | 2078 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2079 | unsigned long flags; |
2080 | ||
2081 | snd_assert(substream != NULL, return); | |
2082 | runtime = substream->runtime; | |
2083 | snd_assert(runtime != NULL, return); | |
2084 | ||
2085 | if (runtime->transfer_ack_begin) | |
2086 | runtime->transfer_ack_begin(substream); | |
2087 | ||
2088 | snd_pcm_stream_lock_irqsave(substream, flags); | |
2089 | if (!snd_pcm_running(substream) || | |
2090 | snd_pcm_update_hw_ptr_interrupt(substream) < 0) | |
2091 | goto _end; | |
2092 | ||
2093 | if (substream->timer_running) | |
2094 | snd_timer_interrupt(substream->timer, 1); | |
2095 | if (runtime->sleep_min) | |
2096 | snd_pcm_tick_prepare(substream); | |
2097 | _end: | |
2098 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
2099 | if (runtime->transfer_ack_end) | |
2100 | runtime->transfer_ack_end(substream); | |
2101 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
2102 | } | |
2103 | ||
877211f5 | 2104 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2105 | unsigned int hwoff, |
2106 | unsigned long data, unsigned int off, | |
2107 | snd_pcm_uframes_t frames) | |
2108 | { | |
877211f5 | 2109 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2110 | int err; |
2111 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2112 | if (substream->ops->copy) { | |
2113 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2114 | return err; | |
2115 | } else { | |
2116 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
2117 | snd_assert(runtime->dma_area, return -EFAULT); | |
2118 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) | |
2119 | return -EFAULT; | |
2120 | } | |
2121 | return 0; | |
2122 | } | |
2123 | ||
877211f5 | 2124 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
2125 | unsigned long data, unsigned int off, |
2126 | snd_pcm_uframes_t size); | |
2127 | ||
877211f5 | 2128 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2129 | unsigned long data, |
2130 | snd_pcm_uframes_t size, | |
2131 | int nonblock, | |
2132 | transfer_f transfer) | |
2133 | { | |
877211f5 | 2134 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2135 | snd_pcm_uframes_t xfer = 0; |
2136 | snd_pcm_uframes_t offset = 0; | |
2137 | int err = 0; | |
2138 | ||
2139 | if (size == 0) | |
2140 | return 0; | |
2141 | if (size > runtime->xfer_align) | |
2142 | size -= size % runtime->xfer_align; | |
2143 | ||
2144 | snd_pcm_stream_lock_irq(substream); | |
2145 | switch (runtime->status->state) { | |
2146 | case SNDRV_PCM_STATE_PREPARED: | |
2147 | case SNDRV_PCM_STATE_RUNNING: | |
2148 | case SNDRV_PCM_STATE_PAUSED: | |
2149 | break; | |
2150 | case SNDRV_PCM_STATE_XRUN: | |
2151 | err = -EPIPE; | |
2152 | goto _end_unlock; | |
2153 | case SNDRV_PCM_STATE_SUSPENDED: | |
2154 | err = -ESTRPIPE; | |
2155 | goto _end_unlock; | |
2156 | default: | |
2157 | err = -EBADFD; | |
2158 | goto _end_unlock; | |
2159 | } | |
2160 | ||
2161 | while (size > 0) { | |
2162 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2163 | snd_pcm_uframes_t avail; | |
2164 | snd_pcm_uframes_t cont; | |
2165 | if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
2166 | snd_pcm_update_hw_ptr(substream); | |
2167 | avail = snd_pcm_playback_avail(runtime); | |
2168 | if (((avail < runtime->control->avail_min && size > avail) || | |
2169 | (size >= runtime->xfer_align && avail < runtime->xfer_align))) { | |
2170 | wait_queue_t wait; | |
443feb88 | 2171 | enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state; |
1da177e4 LT |
2172 | long tout; |
2173 | ||
2174 | if (nonblock) { | |
2175 | err = -EAGAIN; | |
2176 | goto _end_unlock; | |
2177 | } | |
2178 | ||
2179 | init_waitqueue_entry(&wait, current); | |
2180 | add_wait_queue(&runtime->sleep, &wait); | |
2181 | while (1) { | |
2182 | if (signal_pending(current)) { | |
2183 | state = SIGNALED; | |
2184 | break; | |
2185 | } | |
2186 | set_current_state(TASK_INTERRUPTIBLE); | |
2187 | snd_pcm_stream_unlock_irq(substream); | |
2188 | tout = schedule_timeout(10 * HZ); | |
2189 | snd_pcm_stream_lock_irq(substream); | |
2190 | if (tout == 0) { | |
2191 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED && | |
2192 | runtime->status->state != SNDRV_PCM_STATE_PAUSED) { | |
2193 | state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED; | |
2194 | break; | |
2195 | } | |
2196 | } | |
2197 | switch (runtime->status->state) { | |
2198 | case SNDRV_PCM_STATE_XRUN: | |
2199 | case SNDRV_PCM_STATE_DRAINING: | |
2200 | state = ERROR; | |
2201 | goto _end_loop; | |
2202 | case SNDRV_PCM_STATE_SUSPENDED: | |
2203 | state = SUSPENDED; | |
2204 | goto _end_loop; | |
443feb88 KW |
2205 | case SNDRV_PCM_STATE_SETUP: |
2206 | state = DROPPED; | |
2207 | goto _end_loop; | |
1da177e4 LT |
2208 | default: |
2209 | break; | |
2210 | } | |
2211 | avail = snd_pcm_playback_avail(runtime); | |
2212 | if (avail >= runtime->control->avail_min) { | |
2213 | state = READY; | |
2214 | break; | |
2215 | } | |
2216 | } | |
2217 | _end_loop: | |
2218 | remove_wait_queue(&runtime->sleep, &wait); | |
2219 | ||
2220 | switch (state) { | |
2221 | case ERROR: | |
2222 | err = -EPIPE; | |
2223 | goto _end_unlock; | |
2224 | case SUSPENDED: | |
2225 | err = -ESTRPIPE; | |
2226 | goto _end_unlock; | |
2227 | case SIGNALED: | |
2228 | err = -ERESTARTSYS; | |
2229 | goto _end_unlock; | |
2230 | case EXPIRED: | |
2231 | snd_printd("playback write error (DMA or IRQ trouble?)\n"); | |
2232 | err = -EIO; | |
2233 | goto _end_unlock; | |
443feb88 KW |
2234 | case DROPPED: |
2235 | err = -EBADFD; | |
2236 | goto _end_unlock; | |
1da177e4 LT |
2237 | default: |
2238 | break; | |
2239 | } | |
2240 | } | |
2241 | if (avail > runtime->xfer_align) | |
2242 | avail -= avail % runtime->xfer_align; | |
2243 | frames = size > avail ? avail : size; | |
2244 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2245 | if (frames > cont) | |
2246 | frames = cont; | |
2247 | snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL); | |
2248 | appl_ptr = runtime->control->appl_ptr; | |
2249 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2250 | snd_pcm_stream_unlock_irq(substream); | |
2251 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
2252 | goto _end; | |
2253 | snd_pcm_stream_lock_irq(substream); | |
2254 | switch (runtime->status->state) { | |
2255 | case SNDRV_PCM_STATE_XRUN: | |
2256 | err = -EPIPE; | |
2257 | goto _end_unlock; | |
2258 | case SNDRV_PCM_STATE_SUSPENDED: | |
2259 | err = -ESTRPIPE; | |
2260 | goto _end_unlock; | |
2261 | default: | |
2262 | break; | |
2263 | } | |
2264 | appl_ptr += frames; | |
2265 | if (appl_ptr >= runtime->boundary) | |
2266 | appl_ptr -= runtime->boundary; | |
2267 | runtime->control->appl_ptr = appl_ptr; | |
2268 | if (substream->ops->ack) | |
2269 | substream->ops->ack(substream); | |
2270 | ||
2271 | offset += frames; | |
2272 | size -= frames; | |
2273 | xfer += frames; | |
2274 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
2275 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2276 | err = snd_pcm_start(substream); | |
2277 | if (err < 0) | |
2278 | goto _end_unlock; | |
2279 | } | |
2280 | if (runtime->sleep_min && | |
2281 | runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
2282 | snd_pcm_tick_prepare(substream); | |
2283 | } | |
2284 | _end_unlock: | |
2285 | snd_pcm_stream_unlock_irq(substream); | |
2286 | _end: | |
2287 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
2288 | } | |
2289 | ||
877211f5 | 2290 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2291 | { |
877211f5 | 2292 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2293 | int nonblock; |
2294 | ||
2295 | snd_assert(substream != NULL, return -ENXIO); | |
2296 | runtime = substream->runtime; | |
2297 | snd_assert(runtime != NULL, return -ENXIO); | |
2298 | snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); | |
2299 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2300 | return -EBADFD; | |
2301 | ||
2302 | snd_assert(substream->ffile != NULL, return -ENXIO); | |
2303 | nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); | |
2304 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
2305 | if (substream->oss.oss) { | |
877211f5 | 2306 | struct snd_pcm_oss_setup *setup = substream->oss.setup; |
1da177e4 LT |
2307 | if (setup != NULL) { |
2308 | if (setup->nonblock) | |
2309 | nonblock = 1; | |
2310 | else if (setup->block) | |
2311 | nonblock = 0; | |
2312 | } | |
2313 | } | |
2314 | #endif | |
2315 | ||
2316 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2317 | runtime->channels > 1) | |
2318 | return -EINVAL; | |
2319 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
2320 | snd_pcm_lib_write_transfer); | |
2321 | } | |
2322 | ||
877211f5 | 2323 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2324 | unsigned int hwoff, |
2325 | unsigned long data, unsigned int off, | |
2326 | snd_pcm_uframes_t frames) | |
2327 | { | |
877211f5 | 2328 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2329 | int err; |
2330 | void __user **bufs = (void __user **)data; | |
2331 | int channels = runtime->channels; | |
2332 | int c; | |
2333 | if (substream->ops->copy) { | |
2334 | snd_assert(substream->ops->silence != NULL, return -EINVAL); | |
2335 | for (c = 0; c < channels; ++c, ++bufs) { | |
2336 | if (*bufs == NULL) { | |
2337 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
2338 | return err; | |
2339 | } else { | |
2340 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2341 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2342 | return err; | |
2343 | } | |
2344 | } | |
2345 | } else { | |
2346 | /* default transfer behaviour */ | |
2347 | size_t dma_csize = runtime->dma_bytes / channels; | |
2348 | snd_assert(runtime->dma_area, return -EFAULT); | |
2349 | for (c = 0; c < channels; ++c, ++bufs) { | |
2350 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2351 | if (*bufs == NULL) { | |
2352 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
2353 | } else { | |
2354 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2355 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
2356 | return -EFAULT; | |
2357 | } | |
2358 | } | |
2359 | } | |
2360 | return 0; | |
2361 | } | |
2362 | ||
877211f5 | 2363 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
2364 | void __user **bufs, |
2365 | snd_pcm_uframes_t frames) | |
2366 | { | |
877211f5 | 2367 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2368 | int nonblock; |
2369 | ||
2370 | snd_assert(substream != NULL, return -ENXIO); | |
2371 | runtime = substream->runtime; | |
2372 | snd_assert(runtime != NULL, return -ENXIO); | |
2373 | snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); | |
2374 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2375 | return -EBADFD; | |
2376 | ||
2377 | snd_assert(substream->ffile != NULL, return -ENXIO); | |
2378 | nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); | |
2379 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
2380 | if (substream->oss.oss) { | |
877211f5 | 2381 | struct snd_pcm_oss_setup *setup = substream->oss.setup; |
1da177e4 LT |
2382 | if (setup != NULL) { |
2383 | if (setup->nonblock) | |
2384 | nonblock = 1; | |
2385 | else if (setup->block) | |
2386 | nonblock = 0; | |
2387 | } | |
2388 | } | |
2389 | #endif | |
2390 | ||
2391 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2392 | return -EINVAL; | |
2393 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
2394 | nonblock, snd_pcm_lib_writev_transfer); | |
2395 | } | |
2396 | ||
877211f5 | 2397 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2398 | unsigned int hwoff, |
2399 | unsigned long data, unsigned int off, | |
2400 | snd_pcm_uframes_t frames) | |
2401 | { | |
877211f5 | 2402 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2403 | int err; |
2404 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2405 | if (substream->ops->copy) { | |
2406 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2407 | return err; | |
2408 | } else { | |
2409 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
2410 | snd_assert(runtime->dma_area, return -EFAULT); | |
2411 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) | |
2412 | return -EFAULT; | |
2413 | } | |
2414 | return 0; | |
2415 | } | |
2416 | ||
877211f5 | 2417 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2418 | unsigned long data, |
2419 | snd_pcm_uframes_t size, | |
2420 | int nonblock, | |
2421 | transfer_f transfer) | |
2422 | { | |
877211f5 | 2423 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2424 | snd_pcm_uframes_t xfer = 0; |
2425 | snd_pcm_uframes_t offset = 0; | |
2426 | int err = 0; | |
2427 | ||
2428 | if (size == 0) | |
2429 | return 0; | |
2430 | if (size > runtime->xfer_align) | |
2431 | size -= size % runtime->xfer_align; | |
2432 | ||
2433 | snd_pcm_stream_lock_irq(substream); | |
2434 | switch (runtime->status->state) { | |
2435 | case SNDRV_PCM_STATE_PREPARED: | |
2436 | if (size >= runtime->start_threshold) { | |
2437 | err = snd_pcm_start(substream); | |
2438 | if (err < 0) | |
2439 | goto _end_unlock; | |
2440 | } | |
2441 | break; | |
2442 | case SNDRV_PCM_STATE_DRAINING: | |
2443 | case SNDRV_PCM_STATE_RUNNING: | |
2444 | case SNDRV_PCM_STATE_PAUSED: | |
2445 | break; | |
2446 | case SNDRV_PCM_STATE_XRUN: | |
2447 | err = -EPIPE; | |
2448 | goto _end_unlock; | |
2449 | case SNDRV_PCM_STATE_SUSPENDED: | |
2450 | err = -ESTRPIPE; | |
2451 | goto _end_unlock; | |
2452 | default: | |
2453 | err = -EBADFD; | |
2454 | goto _end_unlock; | |
2455 | } | |
2456 | ||
2457 | while (size > 0) { | |
2458 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2459 | snd_pcm_uframes_t avail; | |
2460 | snd_pcm_uframes_t cont; | |
2461 | if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
2462 | snd_pcm_update_hw_ptr(substream); | |
2463 | __draining: | |
2464 | avail = snd_pcm_capture_avail(runtime); | |
2465 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
2466 | if (avail < runtime->xfer_align) { | |
2467 | err = -EPIPE; | |
2468 | goto _end_unlock; | |
2469 | } | |
2470 | } else if ((avail < runtime->control->avail_min && size > avail) || | |
2471 | (size >= runtime->xfer_align && avail < runtime->xfer_align)) { | |
2472 | wait_queue_t wait; | |
443feb88 | 2473 | enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state; |
1da177e4 LT |
2474 | long tout; |
2475 | ||
2476 | if (nonblock) { | |
2477 | err = -EAGAIN; | |
2478 | goto _end_unlock; | |
2479 | } | |
2480 | ||
2481 | init_waitqueue_entry(&wait, current); | |
2482 | add_wait_queue(&runtime->sleep, &wait); | |
2483 | while (1) { | |
2484 | if (signal_pending(current)) { | |
2485 | state = SIGNALED; | |
2486 | break; | |
2487 | } | |
2488 | set_current_state(TASK_INTERRUPTIBLE); | |
2489 | snd_pcm_stream_unlock_irq(substream); | |
2490 | tout = schedule_timeout(10 * HZ); | |
2491 | snd_pcm_stream_lock_irq(substream); | |
2492 | if (tout == 0) { | |
2493 | if (runtime->status->state != SNDRV_PCM_STATE_PREPARED && | |
2494 | runtime->status->state != SNDRV_PCM_STATE_PAUSED) { | |
2495 | state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED; | |
2496 | break; | |
2497 | } | |
2498 | } | |
2499 | switch (runtime->status->state) { | |
2500 | case SNDRV_PCM_STATE_XRUN: | |
2501 | state = ERROR; | |
2502 | goto _end_loop; | |
2503 | case SNDRV_PCM_STATE_SUSPENDED: | |
2504 | state = SUSPENDED; | |
2505 | goto _end_loop; | |
2506 | case SNDRV_PCM_STATE_DRAINING: | |
2507 | goto __draining; | |
443feb88 KW |
2508 | case SNDRV_PCM_STATE_SETUP: |
2509 | state = DROPPED; | |
2510 | goto _end_loop; | |
1da177e4 LT |
2511 | default: |
2512 | break; | |
2513 | } | |
2514 | avail = snd_pcm_capture_avail(runtime); | |
2515 | if (avail >= runtime->control->avail_min) { | |
2516 | state = READY; | |
2517 | break; | |
2518 | } | |
2519 | } | |
2520 | _end_loop: | |
2521 | remove_wait_queue(&runtime->sleep, &wait); | |
2522 | ||
2523 | switch (state) { | |
2524 | case ERROR: | |
2525 | err = -EPIPE; | |
2526 | goto _end_unlock; | |
2527 | case SUSPENDED: | |
2528 | err = -ESTRPIPE; | |
2529 | goto _end_unlock; | |
2530 | case SIGNALED: | |
2531 | err = -ERESTARTSYS; | |
2532 | goto _end_unlock; | |
2533 | case EXPIRED: | |
2534 | snd_printd("capture read error (DMA or IRQ trouble?)\n"); | |
2535 | err = -EIO; | |
2536 | goto _end_unlock; | |
443feb88 KW |
2537 | case DROPPED: |
2538 | err = -EBADFD; | |
2539 | goto _end_unlock; | |
1da177e4 LT |
2540 | default: |
2541 | break; | |
2542 | } | |
2543 | } | |
2544 | if (avail > runtime->xfer_align) | |
2545 | avail -= avail % runtime->xfer_align; | |
2546 | frames = size > avail ? avail : size; | |
2547 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2548 | if (frames > cont) | |
2549 | frames = cont; | |
2550 | snd_assert(frames != 0, snd_pcm_stream_unlock_irq(substream); return -EINVAL); | |
2551 | appl_ptr = runtime->control->appl_ptr; | |
2552 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2553 | snd_pcm_stream_unlock_irq(substream); | |
2554 | if ((err = transfer(substream, appl_ofs, data, offset, frames)) < 0) | |
2555 | goto _end; | |
2556 | snd_pcm_stream_lock_irq(substream); | |
2557 | switch (runtime->status->state) { | |
2558 | case SNDRV_PCM_STATE_XRUN: | |
2559 | err = -EPIPE; | |
2560 | goto _end_unlock; | |
2561 | case SNDRV_PCM_STATE_SUSPENDED: | |
2562 | err = -ESTRPIPE; | |
2563 | goto _end_unlock; | |
2564 | default: | |
2565 | break; | |
2566 | } | |
2567 | appl_ptr += frames; | |
2568 | if (appl_ptr >= runtime->boundary) | |
2569 | appl_ptr -= runtime->boundary; | |
2570 | runtime->control->appl_ptr = appl_ptr; | |
2571 | if (substream->ops->ack) | |
2572 | substream->ops->ack(substream); | |
2573 | ||
2574 | offset += frames; | |
2575 | size -= frames; | |
2576 | xfer += frames; | |
2577 | if (runtime->sleep_min && | |
2578 | runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
2579 | snd_pcm_tick_prepare(substream); | |
2580 | } | |
2581 | _end_unlock: | |
2582 | snd_pcm_stream_unlock_irq(substream); | |
2583 | _end: | |
2584 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; | |
2585 | } | |
2586 | ||
877211f5 | 2587 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2588 | { |
877211f5 | 2589 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2590 | int nonblock; |
2591 | ||
2592 | snd_assert(substream != NULL, return -ENXIO); | |
2593 | runtime = substream->runtime; | |
2594 | snd_assert(runtime != NULL, return -ENXIO); | |
2595 | snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); | |
2596 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2597 | return -EBADFD; | |
2598 | ||
2599 | snd_assert(substream->ffile != NULL, return -ENXIO); | |
2600 | nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); | |
2601 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
2602 | if (substream->oss.oss) { | |
877211f5 | 2603 | struct snd_pcm_oss_setup *setup = substream->oss.setup; |
1da177e4 LT |
2604 | if (setup != NULL) { |
2605 | if (setup->nonblock) | |
2606 | nonblock = 1; | |
2607 | else if (setup->block) | |
2608 | nonblock = 0; | |
2609 | } | |
2610 | } | |
2611 | #endif | |
2612 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) | |
2613 | return -EINVAL; | |
2614 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2615 | } | |
2616 | ||
877211f5 | 2617 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2618 | unsigned int hwoff, |
2619 | unsigned long data, unsigned int off, | |
2620 | snd_pcm_uframes_t frames) | |
2621 | { | |
877211f5 | 2622 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2623 | int err; |
2624 | void __user **bufs = (void __user **)data; | |
2625 | int channels = runtime->channels; | |
2626 | int c; | |
2627 | if (substream->ops->copy) { | |
2628 | for (c = 0; c < channels; ++c, ++bufs) { | |
2629 | char __user *buf; | |
2630 | if (*bufs == NULL) | |
2631 | continue; | |
2632 | buf = *bufs + samples_to_bytes(runtime, off); | |
2633 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2634 | return err; | |
2635 | } | |
2636 | } else { | |
2637 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
2638 | snd_assert(runtime->dma_area, return -EFAULT); | |
2639 | for (c = 0; c < channels; ++c, ++bufs) { | |
2640 | char *hwbuf; | |
2641 | char __user *buf; | |
2642 | if (*bufs == NULL) | |
2643 | continue; | |
2644 | ||
2645 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2646 | buf = *bufs + samples_to_bytes(runtime, off); | |
2647 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2648 | return -EFAULT; | |
2649 | } | |
2650 | } | |
2651 | return 0; | |
2652 | } | |
2653 | ||
877211f5 | 2654 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2655 | void __user **bufs, |
2656 | snd_pcm_uframes_t frames) | |
2657 | { | |
877211f5 | 2658 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
2659 | int nonblock; |
2660 | ||
2661 | snd_assert(substream != NULL, return -ENXIO); | |
2662 | runtime = substream->runtime; | |
2663 | snd_assert(runtime != NULL, return -ENXIO); | |
2664 | snd_assert(substream->ops->copy != NULL || runtime->dma_area != NULL, return -EINVAL); | |
2665 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
2666 | return -EBADFD; | |
2667 | ||
2668 | snd_assert(substream->ffile != NULL, return -ENXIO); | |
2669 | nonblock = !!(substream->ffile->f_flags & O_NONBLOCK); | |
2670 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
2671 | if (substream->oss.oss) { | |
877211f5 | 2672 | struct snd_pcm_oss_setup *setup = substream->oss.setup; |
1da177e4 LT |
2673 | if (setup != NULL) { |
2674 | if (setup->nonblock) | |
2675 | nonblock = 1; | |
2676 | else if (setup->block) | |
2677 | nonblock = 0; | |
2678 | } | |
2679 | } | |
2680 | #endif | |
2681 | ||
2682 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2683 | return -EINVAL; | |
2684 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2685 | } | |
2686 | ||
2687 | /* | |
2688 | * Exported symbols | |
2689 | */ | |
2690 | ||
2691 | EXPORT_SYMBOL(snd_interval_refine); | |
2692 | EXPORT_SYMBOL(snd_interval_list); | |
2693 | EXPORT_SYMBOL(snd_interval_ratnum); | |
1da177e4 LT |
2694 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
2695 | EXPORT_SYMBOL(_snd_pcm_hw_param_min); | |
2696 | EXPORT_SYMBOL(_snd_pcm_hw_param_set); | |
2697 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); | |
2698 | EXPORT_SYMBOL(_snd_pcm_hw_param_setinteger); | |
2699 | EXPORT_SYMBOL(snd_pcm_hw_param_value_min); | |
2700 | EXPORT_SYMBOL(snd_pcm_hw_param_value_max); | |
2701 | EXPORT_SYMBOL(snd_pcm_hw_param_mask); | |
2702 | EXPORT_SYMBOL(snd_pcm_hw_param_first); | |
2703 | EXPORT_SYMBOL(snd_pcm_hw_param_last); | |
2704 | EXPORT_SYMBOL(snd_pcm_hw_param_near); | |
2705 | EXPORT_SYMBOL(snd_pcm_hw_param_set); | |
2706 | EXPORT_SYMBOL(snd_pcm_hw_refine); | |
1da177e4 LT |
2707 | EXPORT_SYMBOL(snd_pcm_hw_constraints_init); |
2708 | EXPORT_SYMBOL(snd_pcm_hw_constraints_complete); | |
2709 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); | |
2710 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); | |
2711 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); | |
2712 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); | |
2713 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); | |
2714 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); | |
2715 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); | |
2716 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); | |
2717 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); | |
2718 | EXPORT_SYMBOL(snd_pcm_set_ops); | |
2719 | EXPORT_SYMBOL(snd_pcm_set_sync); | |
2720 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); | |
2721 | EXPORT_SYMBOL(snd_pcm_stop); | |
2722 | EXPORT_SYMBOL(snd_pcm_period_elapsed); | |
2723 | EXPORT_SYMBOL(snd_pcm_lib_write); | |
2724 | EXPORT_SYMBOL(snd_pcm_lib_read); | |
2725 | EXPORT_SYMBOL(snd_pcm_lib_writev); | |
2726 | EXPORT_SYMBOL(snd_pcm_lib_readv); | |
2727 | EXPORT_SYMBOL(snd_pcm_lib_buffer_bytes); | |
2728 | EXPORT_SYMBOL(snd_pcm_lib_period_bytes); | |
2729 | /* pcm_memory.c */ | |
2730 | EXPORT_SYMBOL(snd_pcm_lib_preallocate_free_for_all); | |
2731 | EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages); | |
2732 | EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages_for_all); | |
2733 | EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page); | |
2734 | EXPORT_SYMBOL(snd_pcm_lib_malloc_pages); | |
2735 | EXPORT_SYMBOL(snd_pcm_lib_free_pages); |