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1d14ffa9 FB |
1 | /* |
2 | * QEMU ALSA audio driver | |
3 | * | |
4 | * Copyright (c) 2005 Vassili Karpov (malc) | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | #include <alsa/asoundlib.h> | |
749bc4bf | 25 | #include "qemu-common.h" |
8b438ba3 | 26 | #include "qemu-char.h" |
749bc4bf | 27 | #include "audio.h" |
1d14ffa9 | 28 | |
2637872b | 29 | #if QEMU_GNUC_PREREQ(4, 3) |
30 | #pragma GCC diagnostic ignored "-Waddress" | |
31 | #endif | |
32 | ||
1d14ffa9 FB |
33 | #define AUDIO_CAP "alsa" |
34 | #include "audio_int.h" | |
35 | ||
8b438ba3 | 36 | struct pollhlp { |
37 | snd_pcm_t *handle; | |
38 | struct pollfd *pfds; | |
39 | int count; | |
b4f763b8 | 40 | int mask; |
8b438ba3 | 41 | }; |
42 | ||
1d14ffa9 FB |
43 | typedef struct ALSAVoiceOut { |
44 | HWVoiceOut hw; | |
541ba4e7 | 45 | int wpos; |
46 | int pending; | |
1d14ffa9 FB |
47 | void *pcm_buf; |
48 | snd_pcm_t *handle; | |
8b438ba3 | 49 | struct pollhlp pollhlp; |
1d14ffa9 FB |
50 | } ALSAVoiceOut; |
51 | ||
52 | typedef struct ALSAVoiceIn { | |
53 | HWVoiceIn hw; | |
54 | snd_pcm_t *handle; | |
55 | void *pcm_buf; | |
8b438ba3 | 56 | struct pollhlp pollhlp; |
1d14ffa9 FB |
57 | } ALSAVoiceIn; |
58 | ||
59 | static struct { | |
60 | int size_in_usec_in; | |
61 | int size_in_usec_out; | |
62 | const char *pcm_name_in; | |
63 | const char *pcm_name_out; | |
64 | unsigned int buffer_size_in; | |
65 | unsigned int period_size_in; | |
66 | unsigned int buffer_size_out; | |
67 | unsigned int period_size_out; | |
68 | unsigned int threshold; | |
69 | ||
fe8f096b TS |
70 | int buffer_size_in_overridden; |
71 | int period_size_in_overridden; | |
1d14ffa9 | 72 | |
fe8f096b TS |
73 | int buffer_size_out_overridden; |
74 | int period_size_out_overridden; | |
571ec3d6 | 75 | int verbose; |
1d14ffa9 | 76 | } conf = { |
de2ca4fb | 77 | .buffer_size_out = 4096, |
78 | .period_size_out = 1024, | |
8ead62cf FB |
79 | .pcm_name_out = "default", |
80 | .pcm_name_in = "default", | |
1d14ffa9 FB |
81 | }; |
82 | ||
83 | struct alsa_params_req { | |
ca9cc28c AZ |
84 | int freq; |
85 | snd_pcm_format_t fmt; | |
86 | int nchannels; | |
7a24c800 | 87 | int size_in_usec; |
64333899 | 88 | int override_mask; |
1d14ffa9 FB |
89 | unsigned int buffer_size; |
90 | unsigned int period_size; | |
91 | }; | |
92 | ||
93 | struct alsa_params_obt { | |
94 | int freq; | |
95 | audfmt_e fmt; | |
ca9cc28c | 96 | int endianness; |
1d14ffa9 | 97 | int nchannels; |
c0fe3827 | 98 | snd_pcm_uframes_t samples; |
1d14ffa9 FB |
99 | }; |
100 | ||
101 | static void GCC_FMT_ATTR (2, 3) alsa_logerr (int err, const char *fmt, ...) | |
102 | { | |
103 | va_list ap; | |
104 | ||
105 | va_start (ap, fmt); | |
106 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
107 | va_end (ap); | |
108 | ||
109 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
110 | } | |
111 | ||
112 | static void GCC_FMT_ATTR (3, 4) alsa_logerr2 ( | |
113 | int err, | |
114 | const char *typ, | |
115 | const char *fmt, | |
116 | ... | |
117 | ) | |
118 | { | |
119 | va_list ap; | |
120 | ||
c0fe3827 | 121 | AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ); |
1d14ffa9 FB |
122 | |
123 | va_start (ap, fmt); | |
124 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
125 | va_end (ap); | |
126 | ||
127 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
128 | } | |
129 | ||
6ebfda13 | 130 | static void alsa_fini_poll (struct pollhlp *hlp) |
131 | { | |
132 | int i; | |
133 | struct pollfd *pfds = hlp->pfds; | |
134 | ||
135 | if (pfds) { | |
136 | for (i = 0; i < hlp->count; ++i) { | |
137 | qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL); | |
138 | } | |
139 | qemu_free (pfds); | |
140 | } | |
141 | hlp->pfds = NULL; | |
142 | hlp->count = 0; | |
143 | hlp->handle = NULL; | |
144 | } | |
145 | ||
146 | static void alsa_anal_close1 (snd_pcm_t **handlep) | |
1d14ffa9 FB |
147 | { |
148 | int err = snd_pcm_close (*handlep); | |
149 | if (err) { | |
150 | alsa_logerr (err, "Failed to close PCM handle %p\n", *handlep); | |
151 | } | |
152 | *handlep = NULL; | |
153 | } | |
154 | ||
6ebfda13 | 155 | static void alsa_anal_close (snd_pcm_t **handlep, struct pollhlp *hlp) |
156 | { | |
157 | alsa_fini_poll (hlp); | |
158 | alsa_anal_close1 (handlep); | |
159 | } | |
160 | ||
8b438ba3 | 161 | static int alsa_recover (snd_pcm_t *handle) |
162 | { | |
163 | int err = snd_pcm_prepare (handle); | |
164 | if (err < 0) { | |
165 | alsa_logerr (err, "Failed to prepare handle %p\n", handle); | |
166 | return -1; | |
167 | } | |
168 | return 0; | |
169 | } | |
170 | ||
171 | static int alsa_resume (snd_pcm_t *handle) | |
172 | { | |
173 | int err = snd_pcm_resume (handle); | |
174 | if (err < 0) { | |
175 | alsa_logerr (err, "Failed to resume handle %p\n", handle); | |
176 | return -1; | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static void alsa_poll_handler (void *opaque) | |
182 | { | |
183 | int err, count; | |
184 | snd_pcm_state_t state; | |
185 | struct pollhlp *hlp = opaque; | |
186 | unsigned short revents; | |
187 | ||
188 | count = poll (hlp->pfds, hlp->count, 0); | |
189 | if (count < 0) { | |
190 | dolog ("alsa_poll_handler: poll %s\n", strerror (errno)); | |
191 | return; | |
192 | } | |
193 | ||
194 | if (!count) { | |
195 | return; | |
196 | } | |
197 | ||
198 | /* XXX: ALSA example uses initial count, not the one returned by | |
199 | poll, correct? */ | |
200 | err = snd_pcm_poll_descriptors_revents (hlp->handle, hlp->pfds, | |
201 | hlp->count, &revents); | |
202 | if (err < 0) { | |
203 | alsa_logerr (err, "snd_pcm_poll_descriptors_revents"); | |
204 | return; | |
205 | } | |
206 | ||
b4f763b8 | 207 | if (!(revents & hlp->mask)) { |
8b438ba3 | 208 | if (conf.verbose) { |
209 | dolog ("revents = %d\n", revents); | |
210 | } | |
211 | return; | |
212 | } | |
213 | ||
214 | state = snd_pcm_state (hlp->handle); | |
215 | switch (state) { | |
d9812b03 | 216 | case SND_PCM_STATE_SETUP: |
217 | alsa_recover (hlp->handle); | |
218 | break; | |
219 | ||
8b438ba3 | 220 | case SND_PCM_STATE_XRUN: |
221 | alsa_recover (hlp->handle); | |
222 | break; | |
223 | ||
224 | case SND_PCM_STATE_SUSPENDED: | |
225 | alsa_resume (hlp->handle); | |
226 | break; | |
227 | ||
228 | case SND_PCM_STATE_PREPARED: | |
229 | audio_run ("alsa run (prepared)"); | |
230 | break; | |
231 | ||
232 | case SND_PCM_STATE_RUNNING: | |
233 | audio_run ("alsa run (running)"); | |
234 | break; | |
235 | ||
236 | default: | |
237 | dolog ("Unexpected state %d\n", state); | |
238 | } | |
239 | } | |
240 | ||
b4f763b8 | 241 | static int alsa_poll_helper (snd_pcm_t *handle, struct pollhlp *hlp, int mask) |
8b438ba3 | 242 | { |
243 | int i, count, err; | |
244 | struct pollfd *pfds; | |
245 | ||
246 | count = snd_pcm_poll_descriptors_count (handle); | |
247 | if (count <= 0) { | |
248 | dolog ("Could not initialize poll mode\n" | |
249 | "Invalid number of poll descriptors %d\n", count); | |
250 | return -1; | |
251 | } | |
252 | ||
253 | pfds = audio_calloc ("alsa_poll_helper", count, sizeof (*pfds)); | |
254 | if (!pfds) { | |
255 | dolog ("Could not initialize poll mode\n"); | |
256 | return -1; | |
257 | } | |
258 | ||
259 | err = snd_pcm_poll_descriptors (handle, pfds, count); | |
260 | if (err < 0) { | |
261 | alsa_logerr (err, "Could not initialize poll mode\n" | |
262 | "Could not obtain poll descriptors\n"); | |
263 | qemu_free (pfds); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | for (i = 0; i < count; ++i) { | |
268 | if (pfds[i].events & POLLIN) { | |
269 | err = qemu_set_fd_handler (pfds[i].fd, alsa_poll_handler, | |
270 | NULL, hlp); | |
271 | } | |
272 | if (pfds[i].events & POLLOUT) { | |
273 | if (conf.verbose) { | |
274 | dolog ("POLLOUT %d %d\n", i, pfds[i].fd); | |
275 | } | |
276 | err = qemu_set_fd_handler (pfds[i].fd, NULL, | |
277 | alsa_poll_handler, hlp); | |
278 | } | |
279 | if (conf.verbose) { | |
280 | dolog ("Set handler events=%#x index=%d fd=%d err=%d\n", | |
281 | pfds[i].events, i, pfds[i].fd, err); | |
282 | } | |
283 | ||
284 | if (err) { | |
285 | dolog ("Failed to set handler events=%#x index=%d fd=%d err=%d\n", | |
286 | pfds[i].events, i, pfds[i].fd, err); | |
287 | ||
288 | while (i--) { | |
289 | qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL); | |
290 | } | |
291 | qemu_free (pfds); | |
292 | return -1; | |
293 | } | |
294 | } | |
295 | hlp->pfds = pfds; | |
296 | hlp->count = count; | |
297 | hlp->handle = handle; | |
b4f763b8 | 298 | hlp->mask = mask; |
8b438ba3 | 299 | return 0; |
300 | } | |
301 | ||
302 | static int alsa_poll_out (HWVoiceOut *hw) | |
303 | { | |
304 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
305 | ||
b4f763b8 | 306 | return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLOUT); |
8b438ba3 | 307 | } |
308 | ||
309 | static int alsa_poll_in (HWVoiceIn *hw) | |
310 | { | |
311 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
312 | ||
b4f763b8 | 313 | return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLIN); |
8b438ba3 | 314 | } |
315 | ||
1d14ffa9 FB |
316 | static int alsa_write (SWVoiceOut *sw, void *buf, int len) |
317 | { | |
318 | return audio_pcm_sw_write (sw, buf, len); | |
319 | } | |
320 | ||
ca9cc28c | 321 | static snd_pcm_format_t aud_to_alsafmt (audfmt_e fmt) |
1d14ffa9 FB |
322 | { |
323 | switch (fmt) { | |
324 | case AUD_FMT_S8: | |
325 | return SND_PCM_FORMAT_S8; | |
326 | ||
327 | case AUD_FMT_U8: | |
328 | return SND_PCM_FORMAT_U8; | |
329 | ||
330 | case AUD_FMT_S16: | |
331 | return SND_PCM_FORMAT_S16_LE; | |
332 | ||
333 | case AUD_FMT_U16: | |
334 | return SND_PCM_FORMAT_U16_LE; | |
335 | ||
f941aa25 TS |
336 | case AUD_FMT_S32: |
337 | return SND_PCM_FORMAT_S32_LE; | |
338 | ||
339 | case AUD_FMT_U32: | |
340 | return SND_PCM_FORMAT_U32_LE; | |
341 | ||
1d14ffa9 FB |
342 | default: |
343 | dolog ("Internal logic error: Bad audio format %d\n", fmt); | |
344 | #ifdef DEBUG_AUDIO | |
345 | abort (); | |
346 | #endif | |
347 | return SND_PCM_FORMAT_U8; | |
348 | } | |
349 | } | |
350 | ||
ca9cc28c AZ |
351 | static int alsa_to_audfmt (snd_pcm_format_t alsafmt, audfmt_e *fmt, |
352 | int *endianness) | |
1d14ffa9 FB |
353 | { |
354 | switch (alsafmt) { | |
355 | case SND_PCM_FORMAT_S8: | |
356 | *endianness = 0; | |
357 | *fmt = AUD_FMT_S8; | |
358 | break; | |
359 | ||
360 | case SND_PCM_FORMAT_U8: | |
361 | *endianness = 0; | |
362 | *fmt = AUD_FMT_U8; | |
363 | break; | |
364 | ||
365 | case SND_PCM_FORMAT_S16_LE: | |
366 | *endianness = 0; | |
367 | *fmt = AUD_FMT_S16; | |
368 | break; | |
369 | ||
370 | case SND_PCM_FORMAT_U16_LE: | |
371 | *endianness = 0; | |
372 | *fmt = AUD_FMT_U16; | |
373 | break; | |
374 | ||
375 | case SND_PCM_FORMAT_S16_BE: | |
376 | *endianness = 1; | |
377 | *fmt = AUD_FMT_S16; | |
378 | break; | |
379 | ||
380 | case SND_PCM_FORMAT_U16_BE: | |
381 | *endianness = 1; | |
382 | *fmt = AUD_FMT_U16; | |
383 | break; | |
384 | ||
f941aa25 TS |
385 | case SND_PCM_FORMAT_S32_LE: |
386 | *endianness = 0; | |
387 | *fmt = AUD_FMT_S32; | |
388 | break; | |
389 | ||
390 | case SND_PCM_FORMAT_U32_LE: | |
391 | *endianness = 0; | |
392 | *fmt = AUD_FMT_U32; | |
393 | break; | |
394 | ||
395 | case SND_PCM_FORMAT_S32_BE: | |
396 | *endianness = 1; | |
397 | *fmt = AUD_FMT_S32; | |
398 | break; | |
399 | ||
400 | case SND_PCM_FORMAT_U32_BE: | |
401 | *endianness = 1; | |
402 | *fmt = AUD_FMT_U32; | |
403 | break; | |
404 | ||
1d14ffa9 FB |
405 | default: |
406 | dolog ("Unrecognized audio format %d\n", alsafmt); | |
407 | return -1; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
1d14ffa9 FB |
413 | static void alsa_dump_info (struct alsa_params_req *req, |
414 | struct alsa_params_obt *obt) | |
415 | { | |
416 | dolog ("parameter | requested value | obtained value\n"); | |
417 | dolog ("format | %10d | %10d\n", req->fmt, obt->fmt); | |
418 | dolog ("channels | %10d | %10d\n", | |
419 | req->nchannels, obt->nchannels); | |
420 | dolog ("frequency | %10d | %10d\n", req->freq, obt->freq); | |
421 | dolog ("============================================\n"); | |
422 | dolog ("requested: buffer size %d period size %d\n", | |
423 | req->buffer_size, req->period_size); | |
c0fe3827 | 424 | dolog ("obtained: samples %ld\n", obt->samples); |
1d14ffa9 | 425 | } |
1d14ffa9 FB |
426 | |
427 | static void alsa_set_threshold (snd_pcm_t *handle, snd_pcm_uframes_t threshold) | |
428 | { | |
429 | int err; | |
430 | snd_pcm_sw_params_t *sw_params; | |
431 | ||
432 | snd_pcm_sw_params_alloca (&sw_params); | |
433 | ||
434 | err = snd_pcm_sw_params_current (handle, sw_params); | |
435 | if (err < 0) { | |
c0fe3827 | 436 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
437 | alsa_logerr (err, "Failed to get current software parameters\n"); |
438 | return; | |
439 | } | |
440 | ||
441 | err = snd_pcm_sw_params_set_start_threshold (handle, sw_params, threshold); | |
442 | if (err < 0) { | |
c0fe3827 | 443 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
444 | alsa_logerr (err, "Failed to set software threshold to %ld\n", |
445 | threshold); | |
446 | return; | |
447 | } | |
448 | ||
449 | err = snd_pcm_sw_params (handle, sw_params); | |
450 | if (err < 0) { | |
c0fe3827 | 451 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
452 | alsa_logerr (err, "Failed to set software parameters\n"); |
453 | return; | |
454 | } | |
455 | } | |
456 | ||
457 | static int alsa_open (int in, struct alsa_params_req *req, | |
458 | struct alsa_params_obt *obt, snd_pcm_t **handlep) | |
459 | { | |
460 | snd_pcm_t *handle; | |
461 | snd_pcm_hw_params_t *hw_params; | |
60fe76f3 | 462 | int err; |
7a24c800 | 463 | int size_in_usec; |
60fe76f3 | 464 | unsigned int freq, nchannels; |
1d14ffa9 | 465 | const char *pcm_name = in ? conf.pcm_name_in : conf.pcm_name_out; |
1d14ffa9 FB |
466 | snd_pcm_uframes_t obt_buffer_size; |
467 | const char *typ = in ? "ADC" : "DAC"; | |
ca9cc28c | 468 | snd_pcm_format_t obtfmt; |
1d14ffa9 FB |
469 | |
470 | freq = req->freq; | |
1d14ffa9 | 471 | nchannels = req->nchannels; |
7a24c800 | 472 | size_in_usec = req->size_in_usec; |
1d14ffa9 FB |
473 | |
474 | snd_pcm_hw_params_alloca (&hw_params); | |
475 | ||
476 | err = snd_pcm_open ( | |
477 | &handle, | |
478 | pcm_name, | |
479 | in ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK, | |
480 | SND_PCM_NONBLOCK | |
481 | ); | |
482 | if (err < 0) { | |
483 | alsa_logerr2 (err, typ, "Failed to open `%s':\n", pcm_name); | |
484 | return -1; | |
485 | } | |
486 | ||
487 | err = snd_pcm_hw_params_any (handle, hw_params); | |
488 | if (err < 0) { | |
489 | alsa_logerr2 (err, typ, "Failed to initialize hardware parameters\n"); | |
490 | goto err; | |
491 | } | |
492 | ||
493 | err = snd_pcm_hw_params_set_access ( | |
494 | handle, | |
495 | hw_params, | |
496 | SND_PCM_ACCESS_RW_INTERLEAVED | |
497 | ); | |
498 | if (err < 0) { | |
499 | alsa_logerr2 (err, typ, "Failed to set access type\n"); | |
500 | goto err; | |
501 | } | |
502 | ||
503 | err = snd_pcm_hw_params_set_format (handle, hw_params, req->fmt); | |
ca9cc28c | 504 | if (err < 0 && conf.verbose) { |
1d14ffa9 | 505 | alsa_logerr2 (err, typ, "Failed to set format %d\n", req->fmt); |
1d14ffa9 FB |
506 | } |
507 | ||
508 | err = snd_pcm_hw_params_set_rate_near (handle, hw_params, &freq, 0); | |
509 | if (err < 0) { | |
510 | alsa_logerr2 (err, typ, "Failed to set frequency %d\n", req->freq); | |
511 | goto err; | |
512 | } | |
513 | ||
514 | err = snd_pcm_hw_params_set_channels_near ( | |
515 | handle, | |
516 | hw_params, | |
517 | &nchannels | |
518 | ); | |
519 | if (err < 0) { | |
520 | alsa_logerr2 (err, typ, "Failed to set number of channels %d\n", | |
521 | req->nchannels); | |
522 | goto err; | |
523 | } | |
524 | ||
525 | if (nchannels != 1 && nchannels != 2) { | |
526 | alsa_logerr2 (err, typ, | |
527 | "Can not handle obtained number of channels %d\n", | |
528 | nchannels); | |
529 | goto err; | |
530 | } | |
531 | ||
7a24c800 | 532 | if (req->buffer_size) { |
f3b52983 | 533 | unsigned long obt; |
534 | ||
7a24c800 | 535 | if (size_in_usec) { |
536 | int dir = 0; | |
537 | unsigned int btime = req->buffer_size; | |
1d14ffa9 FB |
538 | |
539 | err = snd_pcm_hw_params_set_buffer_time_near ( | |
540 | handle, | |
541 | hw_params, | |
7a24c800 | 542 | &btime, |
543 | &dir | |
c0fe3827 | 544 | ); |
f3b52983 | 545 | obt = btime; |
1d14ffa9 FB |
546 | } |
547 | else { | |
7a24c800 | 548 | snd_pcm_uframes_t bsize = req->buffer_size; |
1d14ffa9 | 549 | |
7a24c800 | 550 | err = snd_pcm_hw_params_set_buffer_size_near ( |
551 | handle, | |
552 | hw_params, | |
553 | &bsize | |
554 | ); | |
f3b52983 | 555 | obt = bsize; |
7a24c800 | 556 | } |
557 | if (err < 0) { | |
558 | alsa_logerr2 (err, typ, "Failed to set buffer %s to %d\n", | |
559 | size_in_usec ? "time" : "size", req->buffer_size); | |
560 | goto err; | |
561 | } | |
f3b52983 | 562 | |
64333899 | 563 | if ((req->override_mask & 2) && (obt - req->buffer_size)) |
f3b52983 | 564 | dolog ("Requested buffer %s %u was rejected, using %lu\n", |
565 | size_in_usec ? "time" : "size", req->buffer_size, obt); | |
7a24c800 | 566 | } |
567 | ||
568 | if (req->period_size) { | |
f3b52983 | 569 | unsigned long obt; |
570 | ||
7a24c800 | 571 | if (size_in_usec) { |
572 | int dir = 0; | |
573 | unsigned int ptime = req->period_size; | |
1d14ffa9 | 574 | |
7a24c800 | 575 | err = snd_pcm_hw_params_set_period_time_near ( |
576 | handle, | |
1d14ffa9 | 577 | hw_params, |
7a24c800 | 578 | &ptime, |
579 | &dir | |
1d14ffa9 | 580 | ); |
f3b52983 | 581 | obt = ptime; |
7a24c800 | 582 | } |
583 | else { | |
a7bb29ba | 584 | int dir = 0; |
7a24c800 | 585 | snd_pcm_uframes_t psize = req->period_size; |
1d14ffa9 | 586 | |
a7bb29ba | 587 | err = snd_pcm_hw_params_set_period_size_near ( |
1d14ffa9 FB |
588 | handle, |
589 | hw_params, | |
a7bb29ba | 590 | &psize, |
591 | &dir | |
1d14ffa9 | 592 | ); |
f3b52983 | 593 | obt = psize; |
1d14ffa9 | 594 | } |
7a24c800 | 595 | |
596 | if (err < 0) { | |
597 | alsa_logerr2 (err, typ, "Failed to set period %s to %d\n", | |
598 | size_in_usec ? "time" : "size", req->period_size); | |
599 | goto err; | |
600 | } | |
f3b52983 | 601 | |
541ba4e7 | 602 | if (((req->override_mask & 1) && (obt - req->period_size))) |
f3b52983 | 603 | dolog ("Requested period %s %u was rejected, using %lu\n", |
604 | size_in_usec ? "time" : "size", req->period_size, obt); | |
1d14ffa9 FB |
605 | } |
606 | ||
607 | err = snd_pcm_hw_params (handle, hw_params); | |
608 | if (err < 0) { | |
609 | alsa_logerr2 (err, typ, "Failed to apply audio parameters\n"); | |
610 | goto err; | |
611 | } | |
612 | ||
613 | err = snd_pcm_hw_params_get_buffer_size (hw_params, &obt_buffer_size); | |
614 | if (err < 0) { | |
615 | alsa_logerr2 (err, typ, "Failed to get buffer size\n"); | |
616 | goto err; | |
617 | } | |
618 | ||
ca9cc28c AZ |
619 | err = snd_pcm_hw_params_get_format (hw_params, &obtfmt); |
620 | if (err < 0) { | |
621 | alsa_logerr2 (err, typ, "Failed to get format\n"); | |
622 | goto err; | |
623 | } | |
624 | ||
625 | if (alsa_to_audfmt (obtfmt, &obt->fmt, &obt->endianness)) { | |
626 | dolog ("Invalid format was returned %d\n", obtfmt); | |
627 | goto err; | |
628 | } | |
629 | ||
1d14ffa9 FB |
630 | err = snd_pcm_prepare (handle); |
631 | if (err < 0) { | |
c0fe3827 | 632 | alsa_logerr2 (err, typ, "Could not prepare handle %p\n", handle); |
1d14ffa9 FB |
633 | goto err; |
634 | } | |
635 | ||
1d14ffa9 FB |
636 | if (!in && conf.threshold) { |
637 | snd_pcm_uframes_t threshold; | |
638 | int bytes_per_sec; | |
639 | ||
ca9cc28c AZ |
640 | bytes_per_sec = freq << (nchannels == 2); |
641 | ||
642 | switch (obt->fmt) { | |
643 | case AUD_FMT_S8: | |
644 | case AUD_FMT_U8: | |
645 | break; | |
646 | ||
647 | case AUD_FMT_S16: | |
648 | case AUD_FMT_U16: | |
649 | bytes_per_sec <<= 1; | |
650 | break; | |
651 | ||
652 | case AUD_FMT_S32: | |
653 | case AUD_FMT_U32: | |
654 | bytes_per_sec <<= 2; | |
655 | break; | |
656 | } | |
1d14ffa9 FB |
657 | |
658 | threshold = (conf.threshold * bytes_per_sec) / 1000; | |
659 | alsa_set_threshold (handle, threshold); | |
660 | } | |
661 | ||
1d14ffa9 FB |
662 | obt->nchannels = nchannels; |
663 | obt->freq = freq; | |
c0fe3827 | 664 | obt->samples = obt_buffer_size; |
ca9cc28c | 665 | |
1d14ffa9 FB |
666 | *handlep = handle; |
667 | ||
ca9cc28c AZ |
668 | if (conf.verbose && |
669 | (obt->fmt != req->fmt || | |
670 | obt->nchannels != req->nchannels || | |
671 | obt->freq != req->freq)) { | |
f093feb7 | 672 | dolog ("Audio parameters for %s\n", typ); |
1d14ffa9 | 673 | alsa_dump_info (req, obt); |
1d14ffa9 FB |
674 | } |
675 | ||
676 | #ifdef DEBUG | |
677 | alsa_dump_info (req, obt); | |
678 | #endif | |
679 | return 0; | |
680 | ||
681 | err: | |
6ebfda13 | 682 | alsa_anal_close1 (&handle); |
1d14ffa9 FB |
683 | return -1; |
684 | } | |
685 | ||
571ec3d6 FB |
686 | static snd_pcm_sframes_t alsa_get_avail (snd_pcm_t *handle) |
687 | { | |
688 | snd_pcm_sframes_t avail; | |
689 | ||
690 | avail = snd_pcm_avail_update (handle); | |
691 | if (avail < 0) { | |
692 | if (avail == -EPIPE) { | |
693 | if (!alsa_recover (handle)) { | |
694 | avail = snd_pcm_avail_update (handle); | |
695 | } | |
696 | } | |
697 | ||
698 | if (avail < 0) { | |
699 | alsa_logerr (avail, | |
700 | "Could not obtain number of available frames\n"); | |
701 | return -1; | |
702 | } | |
703 | } | |
704 | ||
705 | return avail; | |
706 | } | |
707 | ||
541ba4e7 | 708 | static void alsa_write_pending (ALSAVoiceOut *alsa) |
1d14ffa9 | 709 | { |
541ba4e7 | 710 | HWVoiceOut *hw = &alsa->hw; |
1d14ffa9 | 711 | |
541ba4e7 | 712 | while (alsa->pending) { |
713 | int left_till_end_samples = hw->samples - alsa->wpos; | |
714 | int len = audio_MIN (alsa->pending, left_till_end_samples); | |
715 | char *src = advance (alsa->pcm_buf, alsa->wpos << hw->info.shift); | |
1d14ffa9 | 716 | |
571ec3d6 | 717 | while (len) { |
541ba4e7 | 718 | snd_pcm_sframes_t written; |
719 | ||
720 | written = snd_pcm_writei (alsa->handle, src, len); | |
4787c71d | 721 | |
571ec3d6 | 722 | if (written <= 0) { |
4787c71d | 723 | switch (written) { |
571ec3d6 FB |
724 | case 0: |
725 | if (conf.verbose) { | |
726 | dolog ("Failed to write %d frames (wrote zero)\n", len); | |
4787c71d | 727 | } |
541ba4e7 | 728 | return; |
4787c71d | 729 | |
571ec3d6 FB |
730 | case -EPIPE: |
731 | if (alsa_recover (alsa->handle)) { | |
732 | alsa_logerr (written, "Failed to write %d frames\n", | |
733 | len); | |
541ba4e7 | 734 | return; |
571ec3d6 FB |
735 | } |
736 | if (conf.verbose) { | |
737 | dolog ("Recovering from playback xrun\n"); | |
738 | } | |
4787c71d FB |
739 | continue; |
740 | ||
86635821 BM |
741 | case -ESTRPIPE: |
742 | /* stream is suspended and waiting for an | |
743 | application recovery */ | |
744 | if (alsa_resume (alsa->handle)) { | |
745 | alsa_logerr (written, "Failed to write %d frames\n", | |
746 | len); | |
541ba4e7 | 747 | return; |
86635821 BM |
748 | } |
749 | if (conf.verbose) { | |
750 | dolog ("Resuming suspended output stream\n"); | |
751 | } | |
752 | continue; | |
753 | ||
571ec3d6 | 754 | case -EAGAIN: |
541ba4e7 | 755 | return; |
571ec3d6 | 756 | |
4787c71d | 757 | default: |
541ba4e7 | 758 | alsa_logerr (written, "Failed to write %d frames from %p\n", |
759 | len, src); | |
760 | return; | |
1d14ffa9 | 761 | } |
1d14ffa9 | 762 | } |
1d14ffa9 | 763 | |
541ba4e7 | 764 | alsa->wpos = (alsa->wpos + written) % hw->samples; |
765 | alsa->pending -= written; | |
571ec3d6 | 766 | len -= written; |
4787c71d | 767 | } |
1d14ffa9 | 768 | } |
541ba4e7 | 769 | } |
770 | ||
bdff253c | 771 | static int alsa_run_out (HWVoiceOut *hw, int live) |
541ba4e7 | 772 | { |
773 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
bdff253c | 774 | int decr; |
541ba4e7 | 775 | snd_pcm_sframes_t avail; |
776 | ||
541ba4e7 | 777 | avail = alsa_get_avail (alsa->handle); |
778 | if (avail < 0) { | |
779 | dolog ("Could not get number of available playback frames\n"); | |
780 | return 0; | |
781 | } | |
782 | ||
783 | decr = audio_MIN (live, avail); | |
784 | decr = audio_pcm_hw_clip_out (hw, alsa->pcm_buf, decr, alsa->pending); | |
785 | alsa->pending += decr; | |
786 | alsa_write_pending (alsa); | |
1d14ffa9 FB |
787 | return decr; |
788 | } | |
789 | ||
790 | static void alsa_fini_out (HWVoiceOut *hw) | |
791 | { | |
792 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
793 | ||
794 | ldebug ("alsa_fini\n"); | |
6ebfda13 | 795 | alsa_anal_close (&alsa->handle, &alsa->pollhlp); |
1d14ffa9 FB |
796 | |
797 | if (alsa->pcm_buf) { | |
798 | qemu_free (alsa->pcm_buf); | |
799 | alsa->pcm_buf = NULL; | |
800 | } | |
801 | } | |
802 | ||
1ea879e5 | 803 | static int alsa_init_out (HWVoiceOut *hw, struct audsettings *as) |
1d14ffa9 FB |
804 | { |
805 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
806 | struct alsa_params_req req; | |
807 | struct alsa_params_obt obt; | |
1d14ffa9 | 808 | snd_pcm_t *handle; |
1ea879e5 | 809 | struct audsettings obt_as; |
1d14ffa9 | 810 | |
c0fe3827 FB |
811 | req.fmt = aud_to_alsafmt (as->fmt); |
812 | req.freq = as->freq; | |
813 | req.nchannels = as->nchannels; | |
1d14ffa9 FB |
814 | req.period_size = conf.period_size_out; |
815 | req.buffer_size = conf.buffer_size_out; | |
23fb600b | 816 | req.size_in_usec = conf.size_in_usec_out; |
97f155dd GH |
817 | req.override_mask = |
818 | (conf.period_size_out_overridden ? 1 : 0) | | |
819 | (conf.buffer_size_out_overridden ? 2 : 0); | |
1d14ffa9 FB |
820 | |
821 | if (alsa_open (0, &req, &obt, &handle)) { | |
822 | return -1; | |
823 | } | |
824 | ||
c0fe3827 FB |
825 | obt_as.freq = obt.freq; |
826 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
827 | obt_as.fmt = obt.fmt; |
828 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 829 | |
d929eba5 | 830 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 831 | hw->samples = obt.samples; |
1d14ffa9 | 832 | |
c0fe3827 | 833 | alsa->pcm_buf = audio_calloc (AUDIO_FUNC, obt.samples, 1 << hw->info.shift); |
1d14ffa9 | 834 | if (!alsa->pcm_buf) { |
4787c71d FB |
835 | dolog ("Could not allocate DAC buffer (%d samples, each %d bytes)\n", |
836 | hw->samples, 1 << hw->info.shift); | |
6ebfda13 | 837 | alsa_anal_close1 (&handle); |
1d14ffa9 FB |
838 | return -1; |
839 | } | |
840 | ||
841 | alsa->handle = handle; | |
1d14ffa9 FB |
842 | return 0; |
843 | } | |
844 | ||
571ec3d6 | 845 | static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int pause) |
1d14ffa9 FB |
846 | { |
847 | int err; | |
571ec3d6 FB |
848 | |
849 | if (pause) { | |
850 | err = snd_pcm_drop (handle); | |
851 | if (err < 0) { | |
32d448c4 | 852 | alsa_logerr (err, "Could not stop %s\n", typ); |
571ec3d6 FB |
853 | return -1; |
854 | } | |
855 | } | |
856 | else { | |
857 | err = snd_pcm_prepare (handle); | |
858 | if (err < 0) { | |
32d448c4 | 859 | alsa_logerr (err, "Could not prepare handle for %s\n", typ); |
571ec3d6 FB |
860 | return -1; |
861 | } | |
862 | } | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | static int alsa_ctl_out (HWVoiceOut *hw, int cmd, ...) | |
868 | { | |
1d14ffa9 FB |
869 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
870 | ||
871 | switch (cmd) { | |
872 | case VOICE_ENABLE: | |
301901b5 | 873 | { |
874 | va_list ap; | |
875 | int poll_mode; | |
876 | ||
877 | va_start (ap, cmd); | |
878 | poll_mode = va_arg (ap, int); | |
879 | va_end (ap); | |
880 | ||
881 | ldebug ("enabling voice\n"); | |
882 | if (poll_mode && alsa_poll_out (hw)) { | |
883 | poll_mode = 0; | |
884 | } | |
885 | hw->poll_mode = poll_mode; | |
886 | return alsa_voice_ctl (alsa->handle, "playback", 0); | |
8b438ba3 | 887 | } |
1d14ffa9 FB |
888 | |
889 | case VOICE_DISABLE: | |
890 | ldebug ("disabling voice\n"); | |
571ec3d6 | 891 | return alsa_voice_ctl (alsa->handle, "playback", 1); |
1d14ffa9 | 892 | } |
571ec3d6 FB |
893 | |
894 | return -1; | |
1d14ffa9 FB |
895 | } |
896 | ||
1ea879e5 | 897 | static int alsa_init_in (HWVoiceIn *hw, struct audsettings *as) |
1d14ffa9 FB |
898 | { |
899 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
900 | struct alsa_params_req req; | |
901 | struct alsa_params_obt obt; | |
1d14ffa9 | 902 | snd_pcm_t *handle; |
1ea879e5 | 903 | struct audsettings obt_as; |
1d14ffa9 | 904 | |
c0fe3827 FB |
905 | req.fmt = aud_to_alsafmt (as->fmt); |
906 | req.freq = as->freq; | |
907 | req.nchannels = as->nchannels; | |
1d14ffa9 FB |
908 | req.period_size = conf.period_size_in; |
909 | req.buffer_size = conf.buffer_size_in; | |
7a24c800 | 910 | req.size_in_usec = conf.size_in_usec_in; |
97f155dd GH |
911 | req.override_mask = |
912 | (conf.period_size_in_overridden ? 1 : 0) | | |
913 | (conf.buffer_size_in_overridden ? 2 : 0); | |
1d14ffa9 FB |
914 | |
915 | if (alsa_open (1, &req, &obt, &handle)) { | |
916 | return -1; | |
917 | } | |
918 | ||
c0fe3827 FB |
919 | obt_as.freq = obt.freq; |
920 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
921 | obt_as.fmt = obt.fmt; |
922 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 923 | |
d929eba5 | 924 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 FB |
925 | hw->samples = obt.samples; |
926 | ||
927 | alsa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); | |
1d14ffa9 | 928 | if (!alsa->pcm_buf) { |
4787c71d FB |
929 | dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n", |
930 | hw->samples, 1 << hw->info.shift); | |
6ebfda13 | 931 | alsa_anal_close1 (&handle); |
1d14ffa9 FB |
932 | return -1; |
933 | } | |
934 | ||
935 | alsa->handle = handle; | |
936 | return 0; | |
937 | } | |
938 | ||
939 | static void alsa_fini_in (HWVoiceIn *hw) | |
940 | { | |
941 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
942 | ||
6ebfda13 | 943 | alsa_anal_close (&alsa->handle, &alsa->pollhlp); |
1d14ffa9 FB |
944 | |
945 | if (alsa->pcm_buf) { | |
946 | qemu_free (alsa->pcm_buf); | |
947 | alsa->pcm_buf = NULL; | |
948 | } | |
949 | } | |
950 | ||
951 | static int alsa_run_in (HWVoiceIn *hw) | |
952 | { | |
953 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
954 | int hwshift = hw->info.shift; | |
955 | int i; | |
956 | int live = audio_pcm_hw_get_live_in (hw); | |
957 | int dead = hw->samples - live; | |
571ec3d6 | 958 | int decr; |
1d14ffa9 FB |
959 | struct { |
960 | int add; | |
961 | int len; | |
962 | } bufs[2] = { | |
98f9f48c | 963 | { .add = hw->wpos, .len = 0 }, |
964 | { .add = 0, .len = 0 } | |
1d14ffa9 | 965 | }; |
571ec3d6 | 966 | snd_pcm_sframes_t avail; |
1d14ffa9 FB |
967 | snd_pcm_uframes_t read_samples = 0; |
968 | ||
969 | if (!dead) { | |
970 | return 0; | |
971 | } | |
972 | ||
571ec3d6 FB |
973 | avail = alsa_get_avail (alsa->handle); |
974 | if (avail < 0) { | |
975 | dolog ("Could not get number of captured frames\n"); | |
976 | return 0; | |
977 | } | |
978 | ||
86635821 BM |
979 | if (!avail) { |
980 | snd_pcm_state_t state; | |
981 | ||
982 | state = snd_pcm_state (alsa->handle); | |
983 | switch (state) { | |
984 | case SND_PCM_STATE_PREPARED: | |
985 | avail = hw->samples; | |
986 | break; | |
987 | case SND_PCM_STATE_SUSPENDED: | |
988 | /* stream is suspended and waiting for an application recovery */ | |
989 | if (alsa_resume (alsa->handle)) { | |
990 | dolog ("Failed to resume suspended input stream\n"); | |
991 | return 0; | |
992 | } | |
993 | if (conf.verbose) { | |
994 | dolog ("Resuming suspended input stream\n"); | |
995 | } | |
996 | break; | |
997 | default: | |
998 | if (conf.verbose) { | |
999 | dolog ("No frames available and ALSA state is %d\n", state); | |
1000 | } | |
1001 | return 0; | |
1002 | } | |
571ec3d6 FB |
1003 | } |
1004 | ||
1005 | decr = audio_MIN (dead, avail); | |
1006 | if (!decr) { | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | if (hw->wpos + decr > hw->samples) { | |
1d14ffa9 | 1011 | bufs[0].len = (hw->samples - hw->wpos); |
571ec3d6 | 1012 | bufs[1].len = (decr - (hw->samples - hw->wpos)); |
1d14ffa9 FB |
1013 | } |
1014 | else { | |
571ec3d6 | 1015 | bufs[0].len = decr; |
1d14ffa9 FB |
1016 | } |
1017 | ||
1d14ffa9 FB |
1018 | for (i = 0; i < 2; ++i) { |
1019 | void *src; | |
1ea879e5 | 1020 | struct st_sample *dst; |
1d14ffa9 FB |
1021 | snd_pcm_sframes_t nread; |
1022 | snd_pcm_uframes_t len; | |
1023 | ||
1024 | len = bufs[i].len; | |
1025 | ||
1026 | src = advance (alsa->pcm_buf, bufs[i].add << hwshift); | |
1027 | dst = hw->conv_buf + bufs[i].add; | |
1028 | ||
1029 | while (len) { | |
1030 | nread = snd_pcm_readi (alsa->handle, src, len); | |
1031 | ||
571ec3d6 | 1032 | if (nread <= 0) { |
1d14ffa9 | 1033 | switch (nread) { |
571ec3d6 FB |
1034 | case 0: |
1035 | if (conf.verbose) { | |
1036 | dolog ("Failed to read %ld frames (read zero)\n", len); | |
1d14ffa9 | 1037 | } |
1d14ffa9 FB |
1038 | goto exit; |
1039 | ||
571ec3d6 FB |
1040 | case -EPIPE: |
1041 | if (alsa_recover (alsa->handle)) { | |
1042 | alsa_logerr (nread, "Failed to read %ld frames\n", len); | |
1043 | goto exit; | |
1044 | } | |
1045 | if (conf.verbose) { | |
1046 | dolog ("Recovering from capture xrun\n"); | |
1047 | } | |
1d14ffa9 FB |
1048 | continue; |
1049 | ||
571ec3d6 FB |
1050 | case -EAGAIN: |
1051 | goto exit; | |
1052 | ||
1d14ffa9 FB |
1053 | default: |
1054 | alsa_logerr ( | |
1055 | nread, | |
1056 | "Failed to read %ld frames from %p\n", | |
1057 | len, | |
1058 | src | |
1059 | ); | |
1060 | goto exit; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | hw->conv (dst, src, nread, &nominal_volume); | |
1065 | ||
1066 | src = advance (src, nread << hwshift); | |
1067 | dst += nread; | |
1068 | ||
1069 | read_samples += nread; | |
1070 | len -= nread; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | exit: | |
1075 | hw->wpos = (hw->wpos + read_samples) % hw->samples; | |
1076 | return read_samples; | |
1077 | } | |
1078 | ||
1079 | static int alsa_read (SWVoiceIn *sw, void *buf, int size) | |
1080 | { | |
1081 | return audio_pcm_sw_read (sw, buf, size); | |
1082 | } | |
1083 | ||
1084 | static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...) | |
1085 | { | |
571ec3d6 FB |
1086 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
1087 | ||
1088 | switch (cmd) { | |
1089 | case VOICE_ENABLE: | |
a628b869 | 1090 | { |
1091 | va_list ap; | |
1092 | int poll_mode; | |
8b438ba3 | 1093 | |
a628b869 | 1094 | va_start (ap, cmd); |
1095 | poll_mode = va_arg (ap, int); | |
1096 | va_end (ap); | |
1097 | ||
1098 | ldebug ("enabling voice\n"); | |
1099 | if (poll_mode && alsa_poll_in (hw)) { | |
1100 | poll_mode = 0; | |
1101 | } | |
1102 | hw->poll_mode = poll_mode; | |
1103 | ||
1104 | return alsa_voice_ctl (alsa->handle, "capture", 0); | |
1105 | } | |
571ec3d6 FB |
1106 | |
1107 | case VOICE_DISABLE: | |
1108 | ldebug ("disabling voice\n"); | |
8b438ba3 | 1109 | if (hw->poll_mode) { |
1110 | hw->poll_mode = 0; | |
1111 | alsa_fini_poll (&alsa->pollhlp); | |
1112 | } | |
571ec3d6 FB |
1113 | return alsa_voice_ctl (alsa->handle, "capture", 1); |
1114 | } | |
1115 | ||
1116 | return -1; | |
1d14ffa9 FB |
1117 | } |
1118 | ||
1119 | static void *alsa_audio_init (void) | |
1120 | { | |
1121 | return &conf; | |
1122 | } | |
1123 | ||
1124 | static void alsa_audio_fini (void *opaque) | |
1125 | { | |
1126 | (void) opaque; | |
1127 | } | |
1128 | ||
1129 | static struct audio_option alsa_options[] = { | |
98f9f48c | 1130 | { |
1131 | .name = "DAC_SIZE_IN_USEC", | |
1132 | .tag = AUD_OPT_BOOL, | |
1133 | .valp = &conf.size_in_usec_out, | |
1134 | .descr = "DAC period/buffer size in microseconds (otherwise in frames)" | |
1135 | }, | |
1136 | { | |
1137 | .name = "DAC_PERIOD_SIZE", | |
1138 | .tag = AUD_OPT_INT, | |
1139 | .valp = &conf.period_size_out, | |
1140 | .descr = "DAC period size (0 to go with system default)", | |
1141 | .overriddenp = &conf.period_size_out_overridden | |
1142 | }, | |
1143 | { | |
1144 | .name = "DAC_BUFFER_SIZE", | |
1145 | .tag = AUD_OPT_INT, | |
1146 | .valp = &conf.buffer_size_out, | |
1147 | .descr = "DAC buffer size (0 to go with system default)", | |
1148 | .overriddenp = &conf.buffer_size_out_overridden | |
1149 | }, | |
1150 | { | |
1151 | .name = "ADC_SIZE_IN_USEC", | |
1152 | .tag = AUD_OPT_BOOL, | |
1153 | .valp = &conf.size_in_usec_in, | |
1154 | .descr = | |
1155 | "ADC period/buffer size in microseconds (otherwise in frames)" | |
1156 | }, | |
1157 | { | |
1158 | .name = "ADC_PERIOD_SIZE", | |
1159 | .tag = AUD_OPT_INT, | |
1160 | .valp = &conf.period_size_in, | |
1161 | .descr = "ADC period size (0 to go with system default)", | |
1162 | .overriddenp = &conf.period_size_in_overridden | |
1163 | }, | |
1164 | { | |
1165 | .name = "ADC_BUFFER_SIZE", | |
1166 | .tag = AUD_OPT_INT, | |
1167 | .valp = &conf.buffer_size_in, | |
1168 | .descr = "ADC buffer size (0 to go with system default)", | |
1169 | .overriddenp = &conf.buffer_size_in_overridden | |
1170 | }, | |
1171 | { | |
1172 | .name = "THRESHOLD", | |
1173 | .tag = AUD_OPT_INT, | |
1174 | .valp = &conf.threshold, | |
1175 | .descr = "(undocumented)" | |
1176 | }, | |
1177 | { | |
1178 | .name = "DAC_DEV", | |
1179 | .tag = AUD_OPT_STR, | |
1180 | .valp = &conf.pcm_name_out, | |
1181 | .descr = "DAC device name (for instance dmix)" | |
1182 | }, | |
1183 | { | |
1184 | .name = "ADC_DEV", | |
1185 | .tag = AUD_OPT_STR, | |
1186 | .valp = &conf.pcm_name_in, | |
1187 | .descr = "ADC device name" | |
1188 | }, | |
1189 | { | |
1190 | .name = "VERBOSE", | |
1191 | .tag = AUD_OPT_BOOL, | |
1192 | .valp = &conf.verbose, | |
1193 | .descr = "Behave in a more verbose way" | |
1194 | }, | |
2700efa3 | 1195 | { /* End of list */ } |
1d14ffa9 FB |
1196 | }; |
1197 | ||
35f4b58c | 1198 | static struct audio_pcm_ops alsa_pcm_ops = { |
1dd3e4d1 JQ |
1199 | .init_out = alsa_init_out, |
1200 | .fini_out = alsa_fini_out, | |
1201 | .run_out = alsa_run_out, | |
1202 | .write = alsa_write, | |
1203 | .ctl_out = alsa_ctl_out, | |
1204 | ||
1205 | .init_in = alsa_init_in, | |
1206 | .fini_in = alsa_fini_in, | |
1207 | .run_in = alsa_run_in, | |
1208 | .read = alsa_read, | |
8b438ba3 | 1209 | .ctl_in = alsa_ctl_in, |
1d14ffa9 FB |
1210 | }; |
1211 | ||
1212 | struct audio_driver alsa_audio_driver = { | |
bee37f32 JQ |
1213 | .name = "alsa", |
1214 | .descr = "ALSA http://www.alsa-project.org", | |
1215 | .options = alsa_options, | |
1216 | .init = alsa_audio_init, | |
1217 | .fini = alsa_audio_fini, | |
1218 | .pcm_ops = &alsa_pcm_ops, | |
1219 | .can_be_default = 1, | |
1220 | .max_voices_out = INT_MAX, | |
1221 | .max_voices_in = INT_MAX, | |
1222 | .voice_size_out = sizeof (ALSAVoiceOut), | |
1223 | .voice_size_in = sizeof (ALSAVoiceIn) | |
1d14ffa9 | 1224 | }; |