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