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Commit | Line | Data |
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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 | */ | |
0b8fa32f | 24 | |
6086a565 | 25 | #include "qemu/osdep.h" |
1d14ffa9 | 26 | #include <alsa/asoundlib.h> |
1de7afc9 | 27 | #include "qemu/main-loop.h" |
0b8fa32f | 28 | #include "qemu/module.h" |
749bc4bf | 29 | #include "audio.h" |
fbb7ef56 | 30 | #include "trace.h" |
1d14ffa9 | 31 | |
2637872b | 32 | #pragma GCC diagnostic ignored "-Waddress" |
2637872b | 33 | |
1d14ffa9 FB |
34 | #define AUDIO_CAP "alsa" |
35 | #include "audio_int.h" | |
36 | ||
24301189 VR |
37 | #define DEBUG_ALSA 0 |
38 | ||
8b438ba3 | 39 | struct pollhlp { |
40 | snd_pcm_t *handle; | |
41 | struct pollfd *pfds; | |
42 | int count; | |
b4f763b8 | 43 | int mask; |
18e2c177 | 44 | AudioState *s; |
8b438ba3 | 45 | }; |
46 | ||
1d14ffa9 FB |
47 | typedef struct ALSAVoiceOut { |
48 | HWVoiceOut hw; | |
1d14ffa9 | 49 | snd_pcm_t *handle; |
8b438ba3 | 50 | struct pollhlp pollhlp; |
a93f3281 | 51 | Audiodev *dev; |
1d14ffa9 FB |
52 | } ALSAVoiceOut; |
53 | ||
54 | typedef struct ALSAVoiceIn { | |
55 | HWVoiceIn hw; | |
56 | snd_pcm_t *handle; | |
8b438ba3 | 57 | struct pollhlp pollhlp; |
a93f3281 | 58 | Audiodev *dev; |
1d14ffa9 FB |
59 | } ALSAVoiceIn; |
60 | ||
1d14ffa9 | 61 | struct alsa_params_req { |
ca9cc28c AZ |
62 | int freq; |
63 | snd_pcm_format_t fmt; | |
64 | int nchannels; | |
1d14ffa9 FB |
65 | }; |
66 | ||
67 | struct alsa_params_obt { | |
68 | int freq; | |
85bc5852 | 69 | AudioFormat fmt; |
ca9cc28c | 70 | int endianness; |
1d14ffa9 | 71 | int nchannels; |
c0fe3827 | 72 | snd_pcm_uframes_t samples; |
1d14ffa9 FB |
73 | }; |
74 | ||
9edc6313 | 75 | static void G_GNUC_PRINTF (2, 3) alsa_logerr (int err, const char *fmt, ...) |
1d14ffa9 FB |
76 | { |
77 | va_list ap; | |
78 | ||
79 | va_start (ap, fmt); | |
80 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
81 | va_end (ap); | |
82 | ||
83 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
84 | } | |
85 | ||
9edc6313 | 86 | static void G_GNUC_PRINTF (3, 4) alsa_logerr2 ( |
1d14ffa9 FB |
87 | int err, |
88 | const char *typ, | |
89 | const char *fmt, | |
90 | ... | |
91 | ) | |
92 | { | |
93 | va_list ap; | |
94 | ||
c0fe3827 | 95 | AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ); |
1d14ffa9 FB |
96 | |
97 | va_start (ap, fmt); | |
98 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
99 | va_end (ap); | |
100 | ||
101 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
102 | } | |
103 | ||
6ebfda13 | 104 | static void alsa_fini_poll (struct pollhlp *hlp) |
105 | { | |
106 | int i; | |
107 | struct pollfd *pfds = hlp->pfds; | |
108 | ||
109 | if (pfds) { | |
110 | for (i = 0; i < hlp->count; ++i) { | |
111 | qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL); | |
112 | } | |
7267c094 | 113 | g_free (pfds); |
6ebfda13 | 114 | } |
115 | hlp->pfds = NULL; | |
116 | hlp->count = 0; | |
117 | hlp->handle = NULL; | |
118 | } | |
119 | ||
120 | static void alsa_anal_close1 (snd_pcm_t **handlep) | |
1d14ffa9 FB |
121 | { |
122 | int err = snd_pcm_close (*handlep); | |
123 | if (err) { | |
124 | alsa_logerr (err, "Failed to close PCM handle %p\n", *handlep); | |
125 | } | |
126 | *handlep = NULL; | |
127 | } | |
128 | ||
6ebfda13 | 129 | static void alsa_anal_close (snd_pcm_t **handlep, struct pollhlp *hlp) |
130 | { | |
131 | alsa_fini_poll (hlp); | |
132 | alsa_anal_close1 (handlep); | |
133 | } | |
134 | ||
8b438ba3 | 135 | static int alsa_recover (snd_pcm_t *handle) |
136 | { | |
137 | int err = snd_pcm_prepare (handle); | |
138 | if (err < 0) { | |
139 | alsa_logerr (err, "Failed to prepare handle %p\n", handle); | |
140 | return -1; | |
141 | } | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static int alsa_resume (snd_pcm_t *handle) | |
146 | { | |
147 | int err = snd_pcm_resume (handle); | |
148 | if (err < 0) { | |
149 | alsa_logerr (err, "Failed to resume handle %p\n", handle); | |
150 | return -1; | |
151 | } | |
152 | return 0; | |
153 | } | |
154 | ||
155 | static void alsa_poll_handler (void *opaque) | |
156 | { | |
157 | int err, count; | |
158 | snd_pcm_state_t state; | |
159 | struct pollhlp *hlp = opaque; | |
160 | unsigned short revents; | |
161 | ||
162 | count = poll (hlp->pfds, hlp->count, 0); | |
163 | if (count < 0) { | |
164 | dolog ("alsa_poll_handler: poll %s\n", strerror (errno)); | |
165 | return; | |
166 | } | |
167 | ||
168 | if (!count) { | |
169 | return; | |
170 | } | |
171 | ||
172 | /* XXX: ALSA example uses initial count, not the one returned by | |
173 | poll, correct? */ | |
174 | err = snd_pcm_poll_descriptors_revents (hlp->handle, hlp->pfds, | |
175 | hlp->count, &revents); | |
176 | if (err < 0) { | |
177 | alsa_logerr (err, "snd_pcm_poll_descriptors_revents"); | |
178 | return; | |
179 | } | |
180 | ||
b4f763b8 | 181 | if (!(revents & hlp->mask)) { |
fbb7ef56 | 182 | trace_alsa_revents(revents); |
8b438ba3 | 183 | return; |
184 | } | |
185 | ||
186 | state = snd_pcm_state (hlp->handle); | |
187 | switch (state) { | |
d9812b03 | 188 | case SND_PCM_STATE_SETUP: |
189 | alsa_recover (hlp->handle); | |
190 | break; | |
191 | ||
8b438ba3 | 192 | case SND_PCM_STATE_XRUN: |
193 | alsa_recover (hlp->handle); | |
194 | break; | |
195 | ||
196 | case SND_PCM_STATE_SUSPENDED: | |
197 | alsa_resume (hlp->handle); | |
198 | break; | |
199 | ||
200 | case SND_PCM_STATE_PREPARED: | |
18e2c177 | 201 | audio_run(hlp->s, "alsa run (prepared)"); |
8b438ba3 | 202 | break; |
203 | ||
204 | case SND_PCM_STATE_RUNNING: | |
18e2c177 | 205 | audio_run(hlp->s, "alsa run (running)"); |
8b438ba3 | 206 | break; |
207 | ||
208 | default: | |
209 | dolog ("Unexpected state %d\n", state); | |
210 | } | |
211 | } | |
212 | ||
b4f763b8 | 213 | static int alsa_poll_helper (snd_pcm_t *handle, struct pollhlp *hlp, int mask) |
8b438ba3 | 214 | { |
215 | int i, count, err; | |
216 | struct pollfd *pfds; | |
217 | ||
218 | count = snd_pcm_poll_descriptors_count (handle); | |
219 | if (count <= 0) { | |
220 | dolog ("Could not initialize poll mode\n" | |
221 | "Invalid number of poll descriptors %d\n", count); | |
222 | return -1; | |
223 | } | |
224 | ||
d1def19f | 225 | pfds = g_new0(struct pollfd, count); |
8b438ba3 | 226 | |
227 | err = snd_pcm_poll_descriptors (handle, pfds, count); | |
228 | if (err < 0) { | |
229 | alsa_logerr (err, "Could not initialize poll mode\n" | |
230 | "Could not obtain poll descriptors\n"); | |
7267c094 | 231 | g_free (pfds); |
8b438ba3 | 232 | return -1; |
233 | } | |
234 | ||
235 | for (i = 0; i < count; ++i) { | |
236 | if (pfds[i].events & POLLIN) { | |
be93f216 | 237 | qemu_set_fd_handler (pfds[i].fd, alsa_poll_handler, NULL, hlp); |
8b438ba3 | 238 | } |
239 | if (pfds[i].events & POLLOUT) { | |
fbb7ef56 | 240 | trace_alsa_pollout(i, pfds[i].fd); |
be93f216 | 241 | qemu_set_fd_handler (pfds[i].fd, NULL, alsa_poll_handler, hlp); |
8b438ba3 | 242 | } |
fbb7ef56 | 243 | trace_alsa_set_handler(pfds[i].events, i, pfds[i].fd, err); |
8b438ba3 | 244 | |
8b438ba3 | 245 | } |
246 | hlp->pfds = pfds; | |
247 | hlp->count = count; | |
248 | hlp->handle = handle; | |
b4f763b8 | 249 | hlp->mask = mask; |
8b438ba3 | 250 | return 0; |
251 | } | |
252 | ||
253 | static int alsa_poll_out (HWVoiceOut *hw) | |
254 | { | |
255 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
256 | ||
b4f763b8 | 257 | return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLOUT); |
8b438ba3 | 258 | } |
259 | ||
260 | static int alsa_poll_in (HWVoiceIn *hw) | |
261 | { | |
262 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
263 | ||
b4f763b8 | 264 | return alsa_poll_helper (alsa->handle, &alsa->pollhlp, POLLIN); |
8b438ba3 | 265 | } |
266 | ||
85bc5852 | 267 | static snd_pcm_format_t aud_to_alsafmt (AudioFormat fmt, int endianness) |
1d14ffa9 FB |
268 | { |
269 | switch (fmt) { | |
85bc5852 | 270 | case AUDIO_FORMAT_S8: |
1d14ffa9 FB |
271 | return SND_PCM_FORMAT_S8; |
272 | ||
85bc5852 | 273 | case AUDIO_FORMAT_U8: |
1d14ffa9 FB |
274 | return SND_PCM_FORMAT_U8; |
275 | ||
85bc5852 | 276 | case AUDIO_FORMAT_S16: |
d66bddd7 MW |
277 | if (endianness) { |
278 | return SND_PCM_FORMAT_S16_BE; | |
6c6886bd | 279 | } else { |
d66bddd7 MW |
280 | return SND_PCM_FORMAT_S16_LE; |
281 | } | |
1d14ffa9 | 282 | |
85bc5852 | 283 | case AUDIO_FORMAT_U16: |
d66bddd7 MW |
284 | if (endianness) { |
285 | return SND_PCM_FORMAT_U16_BE; | |
6c6886bd | 286 | } else { |
d66bddd7 MW |
287 | return SND_PCM_FORMAT_U16_LE; |
288 | } | |
1d14ffa9 | 289 | |
85bc5852 | 290 | case AUDIO_FORMAT_S32: |
d66bddd7 MW |
291 | if (endianness) { |
292 | return SND_PCM_FORMAT_S32_BE; | |
6c6886bd | 293 | } else { |
d66bddd7 MW |
294 | return SND_PCM_FORMAT_S32_LE; |
295 | } | |
f941aa25 | 296 | |
85bc5852 | 297 | case AUDIO_FORMAT_U32: |
d66bddd7 MW |
298 | if (endianness) { |
299 | return SND_PCM_FORMAT_U32_BE; | |
6c6886bd | 300 | } else { |
d66bddd7 MW |
301 | return SND_PCM_FORMAT_U32_LE; |
302 | } | |
f941aa25 | 303 | |
ed2a4a79 KZ |
304 | case AUDIO_FORMAT_F32: |
305 | if (endianness) { | |
306 | return SND_PCM_FORMAT_FLOAT_BE; | |
307 | } else { | |
308 | return SND_PCM_FORMAT_FLOAT_LE; | |
309 | } | |
310 | ||
1d14ffa9 FB |
311 | default: |
312 | dolog ("Internal logic error: Bad audio format %d\n", fmt); | |
313 | #ifdef DEBUG_AUDIO | |
314 | abort (); | |
315 | #endif | |
316 | return SND_PCM_FORMAT_U8; | |
317 | } | |
318 | } | |
319 | ||
85bc5852 | 320 | static int alsa_to_audfmt (snd_pcm_format_t alsafmt, AudioFormat *fmt, |
ca9cc28c | 321 | int *endianness) |
1d14ffa9 FB |
322 | { |
323 | switch (alsafmt) { | |
324 | case SND_PCM_FORMAT_S8: | |
325 | *endianness = 0; | |
85bc5852 | 326 | *fmt = AUDIO_FORMAT_S8; |
1d14ffa9 FB |
327 | break; |
328 | ||
329 | case SND_PCM_FORMAT_U8: | |
330 | *endianness = 0; | |
85bc5852 | 331 | *fmt = AUDIO_FORMAT_U8; |
1d14ffa9 FB |
332 | break; |
333 | ||
334 | case SND_PCM_FORMAT_S16_LE: | |
335 | *endianness = 0; | |
85bc5852 | 336 | *fmt = AUDIO_FORMAT_S16; |
1d14ffa9 FB |
337 | break; |
338 | ||
339 | case SND_PCM_FORMAT_U16_LE: | |
340 | *endianness = 0; | |
85bc5852 | 341 | *fmt = AUDIO_FORMAT_U16; |
1d14ffa9 FB |
342 | break; |
343 | ||
344 | case SND_PCM_FORMAT_S16_BE: | |
345 | *endianness = 1; | |
85bc5852 | 346 | *fmt = AUDIO_FORMAT_S16; |
1d14ffa9 FB |
347 | break; |
348 | ||
349 | case SND_PCM_FORMAT_U16_BE: | |
350 | *endianness = 1; | |
85bc5852 | 351 | *fmt = AUDIO_FORMAT_U16; |
1d14ffa9 FB |
352 | break; |
353 | ||
f941aa25 TS |
354 | case SND_PCM_FORMAT_S32_LE: |
355 | *endianness = 0; | |
85bc5852 | 356 | *fmt = AUDIO_FORMAT_S32; |
f941aa25 TS |
357 | break; |
358 | ||
359 | case SND_PCM_FORMAT_U32_LE: | |
360 | *endianness = 0; | |
85bc5852 | 361 | *fmt = AUDIO_FORMAT_U32; |
f941aa25 TS |
362 | break; |
363 | ||
364 | case SND_PCM_FORMAT_S32_BE: | |
365 | *endianness = 1; | |
85bc5852 | 366 | *fmt = AUDIO_FORMAT_S32; |
f941aa25 TS |
367 | break; |
368 | ||
369 | case SND_PCM_FORMAT_U32_BE: | |
370 | *endianness = 1; | |
85bc5852 | 371 | *fmt = AUDIO_FORMAT_U32; |
f941aa25 TS |
372 | break; |
373 | ||
ed2a4a79 KZ |
374 | case SND_PCM_FORMAT_FLOAT_LE: |
375 | *endianness = 0; | |
376 | *fmt = AUDIO_FORMAT_F32; | |
377 | break; | |
378 | ||
379 | case SND_PCM_FORMAT_FLOAT_BE: | |
380 | *endianness = 1; | |
381 | *fmt = AUDIO_FORMAT_F32; | |
382 | break; | |
383 | ||
1d14ffa9 FB |
384 | default: |
385 | dolog ("Unrecognized audio format %d\n", alsafmt); | |
386 | return -1; | |
387 | } | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
1d14ffa9 | 392 | static void alsa_dump_info (struct alsa_params_req *req, |
8bb414d2 | 393 | struct alsa_params_obt *obt, |
a93f3281 KZ |
394 | snd_pcm_format_t obtfmt, |
395 | AudiodevAlsaPerDirectionOptions *apdo) | |
1d14ffa9 | 396 | { |
a93f3281 KZ |
397 | dolog("parameter | requested value | obtained value\n"); |
398 | dolog("format | %10d | %10d\n", req->fmt, obtfmt); | |
399 | dolog("channels | %10d | %10d\n", | |
400 | req->nchannels, obt->nchannels); | |
401 | dolog("frequency | %10d | %10d\n", req->freq, obt->freq); | |
402 | dolog("============================================\n"); | |
403 | dolog("requested: buffer len %" PRId32 " period len %" PRId32 "\n", | |
404 | apdo->buffer_length, apdo->period_length); | |
405 | dolog("obtained: samples %ld\n", obt->samples); | |
1d14ffa9 | 406 | } |
1d14ffa9 FB |
407 | |
408 | static void alsa_set_threshold (snd_pcm_t *handle, snd_pcm_uframes_t threshold) | |
409 | { | |
410 | int err; | |
411 | snd_pcm_sw_params_t *sw_params; | |
412 | ||
413 | snd_pcm_sw_params_alloca (&sw_params); | |
414 | ||
415 | err = snd_pcm_sw_params_current (handle, sw_params); | |
416 | if (err < 0) { | |
c0fe3827 | 417 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
418 | alsa_logerr (err, "Failed to get current software parameters\n"); |
419 | return; | |
420 | } | |
421 | ||
422 | err = snd_pcm_sw_params_set_start_threshold (handle, sw_params, threshold); | |
423 | if (err < 0) { | |
c0fe3827 | 424 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
425 | alsa_logerr (err, "Failed to set software threshold to %ld\n", |
426 | threshold); | |
427 | return; | |
428 | } | |
429 | ||
430 | err = snd_pcm_sw_params (handle, sw_params); | |
431 | if (err < 0) { | |
c0fe3827 | 432 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
433 | alsa_logerr (err, "Failed to set software parameters\n"); |
434 | return; | |
435 | } | |
436 | } | |
437 | ||
a93f3281 KZ |
438 | static int alsa_open(bool in, struct alsa_params_req *req, |
439 | struct alsa_params_obt *obt, snd_pcm_t **handlep, | |
440 | Audiodev *dev) | |
1d14ffa9 | 441 | { |
a93f3281 KZ |
442 | AudiodevAlsaOptions *aopts = &dev->u.alsa; |
443 | AudiodevAlsaPerDirectionOptions *apdo = in ? aopts->in : aopts->out; | |
1d14ffa9 FB |
444 | snd_pcm_t *handle; |
445 | snd_pcm_hw_params_t *hw_params; | |
60fe76f3 TS |
446 | int err; |
447 | unsigned int freq, nchannels; | |
ceb19c8f | 448 | const char *pcm_name = apdo->dev ?: "default"; |
1d14ffa9 FB |
449 | snd_pcm_uframes_t obt_buffer_size; |
450 | const char *typ = in ? "ADC" : "DAC"; | |
ca9cc28c | 451 | snd_pcm_format_t obtfmt; |
1d14ffa9 FB |
452 | |
453 | freq = req->freq; | |
1d14ffa9 FB |
454 | nchannels = req->nchannels; |
455 | ||
456 | snd_pcm_hw_params_alloca (&hw_params); | |
457 | ||
458 | err = snd_pcm_open ( | |
459 | &handle, | |
460 | pcm_name, | |
461 | in ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK, | |
462 | SND_PCM_NONBLOCK | |
463 | ); | |
464 | if (err < 0) { | |
465 | alsa_logerr2 (err, typ, "Failed to open `%s':\n", pcm_name); | |
466 | return -1; | |
467 | } | |
468 | ||
469 | err = snd_pcm_hw_params_any (handle, hw_params); | |
470 | if (err < 0) { | |
471 | alsa_logerr2 (err, typ, "Failed to initialize hardware parameters\n"); | |
472 | goto err; | |
473 | } | |
474 | ||
475 | err = snd_pcm_hw_params_set_access ( | |
476 | handle, | |
477 | hw_params, | |
478 | SND_PCM_ACCESS_RW_INTERLEAVED | |
479 | ); | |
480 | if (err < 0) { | |
481 | alsa_logerr2 (err, typ, "Failed to set access type\n"); | |
482 | goto err; | |
483 | } | |
484 | ||
485 | err = snd_pcm_hw_params_set_format (handle, hw_params, req->fmt); | |
fbb7ef56 | 486 | if (err < 0) { |
1d14ffa9 | 487 | alsa_logerr2 (err, typ, "Failed to set format %d\n", req->fmt); |
1d14ffa9 FB |
488 | } |
489 | ||
490 | err = snd_pcm_hw_params_set_rate_near (handle, hw_params, &freq, 0); | |
491 | if (err < 0) { | |
492 | alsa_logerr2 (err, typ, "Failed to set frequency %d\n", req->freq); | |
493 | goto err; | |
494 | } | |
495 | ||
496 | err = snd_pcm_hw_params_set_channels_near ( | |
497 | handle, | |
498 | hw_params, | |
499 | &nchannels | |
500 | ); | |
501 | if (err < 0) { | |
502 | alsa_logerr2 (err, typ, "Failed to set number of channels %d\n", | |
503 | req->nchannels); | |
504 | goto err; | |
505 | } | |
506 | ||
a93f3281 KZ |
507 | if (apdo->buffer_length) { |
508 | int dir = 0; | |
509 | unsigned int btime = apdo->buffer_length; | |
f3b52983 | 510 | |
a93f3281 KZ |
511 | err = snd_pcm_hw_params_set_buffer_time_near( |
512 | handle, hw_params, &btime, &dir); | |
1d14ffa9 | 513 | |
7a24c800 | 514 | if (err < 0) { |
a93f3281 KZ |
515 | alsa_logerr2(err, typ, "Failed to set buffer time to %" PRId32 "\n", |
516 | apdo->buffer_length); | |
7a24c800 | 517 | goto err; |
518 | } | |
f3b52983 | 519 | |
a93f3281 KZ |
520 | if (apdo->has_buffer_length && btime != apdo->buffer_length) { |
521 | dolog("Requested buffer time %" PRId32 | |
522 | " was rejected, using %u\n", apdo->buffer_length, btime); | |
523 | } | |
7a24c800 | 524 | } |
525 | ||
a93f3281 KZ |
526 | if (apdo->period_length) { |
527 | int dir = 0; | |
528 | unsigned int ptime = apdo->period_length; | |
f3b52983 | 529 | |
a93f3281 KZ |
530 | err = snd_pcm_hw_params_set_period_time_near(handle, hw_params, &ptime, |
531 | &dir); | |
7a24c800 | 532 | |
533 | if (err < 0) { | |
a93f3281 KZ |
534 | alsa_logerr2(err, typ, "Failed to set period time to %" PRId32 "\n", |
535 | apdo->period_length); | |
7a24c800 | 536 | goto err; |
537 | } | |
f3b52983 | 538 | |
a93f3281 KZ |
539 | if (apdo->has_period_length && ptime != apdo->period_length) { |
540 | dolog("Requested period time %" PRId32 " was rejected, using %d\n", | |
541 | apdo->period_length, ptime); | |
542 | } | |
1d14ffa9 FB |
543 | } |
544 | ||
545 | err = snd_pcm_hw_params (handle, hw_params); | |
546 | if (err < 0) { | |
547 | alsa_logerr2 (err, typ, "Failed to apply audio parameters\n"); | |
548 | goto err; | |
549 | } | |
550 | ||
551 | err = snd_pcm_hw_params_get_buffer_size (hw_params, &obt_buffer_size); | |
552 | if (err < 0) { | |
553 | alsa_logerr2 (err, typ, "Failed to get buffer size\n"); | |
554 | goto err; | |
555 | } | |
556 | ||
ca9cc28c AZ |
557 | err = snd_pcm_hw_params_get_format (hw_params, &obtfmt); |
558 | if (err < 0) { | |
559 | alsa_logerr2 (err, typ, "Failed to get format\n"); | |
560 | goto err; | |
561 | } | |
562 | ||
563 | if (alsa_to_audfmt (obtfmt, &obt->fmt, &obt->endianness)) { | |
564 | dolog ("Invalid format was returned %d\n", obtfmt); | |
565 | goto err; | |
566 | } | |
567 | ||
1d14ffa9 FB |
568 | err = snd_pcm_prepare (handle); |
569 | if (err < 0) { | |
c0fe3827 | 570 | alsa_logerr2 (err, typ, "Could not prepare handle %p\n", handle); |
1d14ffa9 FB |
571 | goto err; |
572 | } | |
573 | ||
a93f3281 KZ |
574 | if (!in && aopts->has_threshold && aopts->threshold) { |
575 | struct audsettings as = { .freq = freq }; | |
576 | alsa_set_threshold( | |
577 | handle, | |
578 | audio_buffer_frames(qapi_AudiodevAlsaPerDirectionOptions_base(apdo), | |
579 | &as, aopts->threshold)); | |
1d14ffa9 FB |
580 | } |
581 | ||
1d14ffa9 FB |
582 | obt->nchannels = nchannels; |
583 | obt->freq = freq; | |
c0fe3827 | 584 | obt->samples = obt_buffer_size; |
ca9cc28c | 585 | |
1d14ffa9 FB |
586 | *handlep = handle; |
587 | ||
24301189 VR |
588 | if (DEBUG_ALSA || obtfmt != req->fmt || |
589 | obt->nchannels != req->nchannels || obt->freq != req->freq) { | |
f093feb7 | 590 | dolog ("Audio parameters for %s\n", typ); |
a93f3281 | 591 | alsa_dump_info(req, obt, obtfmt, apdo); |
1d14ffa9 FB |
592 | } |
593 | ||
1d14ffa9 FB |
594 | return 0; |
595 | ||
596 | err: | |
6ebfda13 | 597 | alsa_anal_close1 (&handle); |
1d14ffa9 FB |
598 | return -1; |
599 | } | |
600 | ||
5a9d7ae2 VR |
601 | static size_t alsa_buffer_get_free(HWVoiceOut *hw) |
602 | { | |
603 | ALSAVoiceOut *alsa = (ALSAVoiceOut *)hw; | |
604 | snd_pcm_sframes_t avail; | |
605 | size_t alsa_free, generic_free, generic_in_use; | |
606 | ||
607 | avail = snd_pcm_avail_update(alsa->handle); | |
608 | if (avail < 0) { | |
609 | if (avail == -EPIPE) { | |
610 | if (!alsa_recover(alsa->handle)) { | |
611 | avail = snd_pcm_avail_update(alsa->handle); | |
612 | } | |
613 | } | |
614 | if (avail < 0) { | |
615 | alsa_logerr(avail, | |
616 | "Could not obtain number of available frames\n"); | |
617 | avail = 0; | |
618 | } | |
619 | } | |
620 | ||
621 | alsa_free = avail * hw->info.bytes_per_frame; | |
622 | generic_free = audio_generic_buffer_get_free(hw); | |
623 | generic_in_use = hw->samples * hw->info.bytes_per_frame - generic_free; | |
624 | if (generic_in_use) { | |
625 | /* | |
626 | * This code can only be reached in the unlikely case that | |
627 | * snd_pcm_avail_update() returned a larger number of frames | |
628 | * than snd_pcm_writei() could write. Make sure that all | |
629 | * remaining bytes in the generic buffer can be written. | |
630 | */ | |
631 | alsa_free = alsa_free > generic_in_use ? alsa_free - generic_in_use : 0; | |
632 | } | |
633 | ||
634 | return alsa_free; | |
635 | } | |
636 | ||
286a5d20 | 637 | static size_t alsa_write(HWVoiceOut *hw, void *buf, size_t len) |
571ec3d6 | 638 | { |
286a5d20 KZ |
639 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
640 | size_t pos = 0; | |
2b9cce8c | 641 | size_t len_frames = len / hw->info.bytes_per_frame; |
286a5d20 KZ |
642 | |
643 | while (len_frames) { | |
644 | char *src = advance(buf, pos); | |
645 | snd_pcm_sframes_t written; | |
646 | ||
647 | written = snd_pcm_writei(alsa->handle, src, len_frames); | |
648 | ||
649 | if (written <= 0) { | |
650 | switch (written) { | |
651 | case 0: | |
652 | trace_alsa_wrote_zero(len_frames); | |
653 | return pos; | |
654 | ||
655 | case -EPIPE: | |
656 | if (alsa_recover(alsa->handle)) { | |
657 | alsa_logerr(written, "Failed to write %zu frames\n", | |
658 | len_frames); | |
659 | return pos; | |
660 | } | |
661 | trace_alsa_xrun_out(); | |
662 | continue; | |
663 | ||
664 | case -ESTRPIPE: | |
665 | /* | |
666 | * stream is suspended and waiting for an application | |
667 | * recovery | |
668 | */ | |
669 | if (alsa_resume(alsa->handle)) { | |
670 | alsa_logerr(written, "Failed to write %zu frames\n", | |
671 | len_frames); | |
672 | return pos; | |
673 | } | |
674 | trace_alsa_resume_out(); | |
675 | continue; | |
571ec3d6 | 676 | |
286a5d20 KZ |
677 | case -EAGAIN: |
678 | return pos; | |
571ec3d6 | 679 | |
286a5d20 KZ |
680 | default: |
681 | alsa_logerr(written, "Failed to write %zu frames from %p\n", | |
682 | len, src); | |
683 | return pos; | |
1d14ffa9 | 684 | } |
4787c71d | 685 | } |
541ba4e7 | 686 | |
2b9cce8c | 687 | pos += written * hw->info.bytes_per_frame; |
286a5d20 KZ |
688 | if (written < len_frames) { |
689 | break; | |
690 | } | |
691 | len_frames -= written; | |
541ba4e7 | 692 | } |
693 | ||
286a5d20 | 694 | return pos; |
1d14ffa9 FB |
695 | } |
696 | ||
697 | static void alsa_fini_out (HWVoiceOut *hw) | |
698 | { | |
699 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
700 | ||
701 | ldebug ("alsa_fini\n"); | |
6ebfda13 | 702 | alsa_anal_close (&alsa->handle, &alsa->pollhlp); |
1d14ffa9 FB |
703 | } |
704 | ||
5706db1d KZ |
705 | static int alsa_init_out(HWVoiceOut *hw, struct audsettings *as, |
706 | void *drv_opaque) | |
1d14ffa9 FB |
707 | { |
708 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
709 | struct alsa_params_req req; | |
710 | struct alsa_params_obt obt; | |
1d14ffa9 | 711 | snd_pcm_t *handle; |
1ea879e5 | 712 | struct audsettings obt_as; |
a93f3281 | 713 | Audiodev *dev = drv_opaque; |
1d14ffa9 | 714 | |
d66bddd7 | 715 | req.fmt = aud_to_alsafmt (as->fmt, as->endianness); |
c0fe3827 FB |
716 | req.freq = as->freq; |
717 | req.nchannels = as->nchannels; | |
a93f3281 KZ |
718 | |
719 | if (alsa_open(0, &req, &obt, &handle, dev)) { | |
1d14ffa9 FB |
720 | return -1; |
721 | } | |
722 | ||
c0fe3827 FB |
723 | obt_as.freq = obt.freq; |
724 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
725 | obt_as.fmt = obt.fmt; |
726 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 727 | |
d929eba5 | 728 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 729 | hw->samples = obt.samples; |
1d14ffa9 | 730 | |
18e2c177 | 731 | alsa->pollhlp.s = hw->s; |
1d14ffa9 | 732 | alsa->handle = handle; |
a93f3281 | 733 | alsa->dev = dev; |
1d14ffa9 FB |
734 | return 0; |
735 | } | |
736 | ||
38cc9b60 JM |
737 | #define VOICE_CTL_PAUSE 0 |
738 | #define VOICE_CTL_PREPARE 1 | |
739 | #define VOICE_CTL_START 2 | |
740 | ||
741 | static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int ctl) | |
1d14ffa9 FB |
742 | { |
743 | int err; | |
571ec3d6 | 744 | |
38cc9b60 | 745 | if (ctl == VOICE_CTL_PAUSE) { |
571ec3d6 FB |
746 | err = snd_pcm_drop (handle); |
747 | if (err < 0) { | |
32d448c4 | 748 | alsa_logerr (err, "Could not stop %s\n", typ); |
571ec3d6 FB |
749 | return -1; |
750 | } | |
6c6886bd | 751 | } else { |
571ec3d6 FB |
752 | err = snd_pcm_prepare (handle); |
753 | if (err < 0) { | |
32d448c4 | 754 | alsa_logerr (err, "Could not prepare handle for %s\n", typ); |
571ec3d6 FB |
755 | return -1; |
756 | } | |
38cc9b60 JM |
757 | if (ctl == VOICE_CTL_START) { |
758 | err = snd_pcm_start(handle); | |
759 | if (err < 0) { | |
760 | alsa_logerr (err, "Could not start handle for %s\n", typ); | |
761 | return -1; | |
762 | } | |
763 | } | |
571ec3d6 FB |
764 | } |
765 | ||
766 | return 0; | |
767 | } | |
768 | ||
571a8c52 | 769 | static void alsa_enable_out(HWVoiceOut *hw, bool enable) |
571ec3d6 | 770 | { |
1d14ffa9 | 771 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
a93f3281 | 772 | AudiodevAlsaPerDirectionOptions *apdo = alsa->dev->u.alsa.out; |
1d14ffa9 | 773 | |
571a8c52 KZ |
774 | if (enable) { |
775 | bool poll_mode = apdo->try_poll; | |
301901b5 | 776 | |
571a8c52 KZ |
777 | ldebug("enabling voice\n"); |
778 | if (poll_mode && alsa_poll_out(hw)) { | |
779 | poll_mode = 0; | |
8b438ba3 | 780 | } |
571a8c52 KZ |
781 | hw->poll_mode = poll_mode; |
782 | alsa_voice_ctl(alsa->handle, "playback", VOICE_CTL_PREPARE); | |
783 | } else { | |
784 | ldebug("disabling voice\n"); | |
22d948a2 JM |
785 | if (hw->poll_mode) { |
786 | hw->poll_mode = 0; | |
571a8c52 | 787 | alsa_fini_poll(&alsa->pollhlp); |
22d948a2 | 788 | } |
571a8c52 | 789 | alsa_voice_ctl(alsa->handle, "playback", VOICE_CTL_PAUSE); |
1d14ffa9 | 790 | } |
1d14ffa9 FB |
791 | } |
792 | ||
5706db1d | 793 | static int alsa_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque) |
1d14ffa9 FB |
794 | { |
795 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
796 | struct alsa_params_req req; | |
797 | struct alsa_params_obt obt; | |
1d14ffa9 | 798 | snd_pcm_t *handle; |
1ea879e5 | 799 | struct audsettings obt_as; |
a93f3281 | 800 | Audiodev *dev = drv_opaque; |
1d14ffa9 | 801 | |
d66bddd7 | 802 | req.fmt = aud_to_alsafmt (as->fmt, as->endianness); |
c0fe3827 FB |
803 | req.freq = as->freq; |
804 | req.nchannels = as->nchannels; | |
a93f3281 KZ |
805 | |
806 | if (alsa_open(1, &req, &obt, &handle, dev)) { | |
1d14ffa9 FB |
807 | return -1; |
808 | } | |
809 | ||
c0fe3827 FB |
810 | obt_as.freq = obt.freq; |
811 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
812 | obt_as.fmt = obt.fmt; |
813 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 814 | |
d929eba5 | 815 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 FB |
816 | hw->samples = obt.samples; |
817 | ||
18e2c177 | 818 | alsa->pollhlp.s = hw->s; |
1d14ffa9 | 819 | alsa->handle = handle; |
a93f3281 | 820 | alsa->dev = dev; |
1d14ffa9 FB |
821 | return 0; |
822 | } | |
823 | ||
824 | static void alsa_fini_in (HWVoiceIn *hw) | |
825 | { | |
826 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
827 | ||
6ebfda13 | 828 | alsa_anal_close (&alsa->handle, &alsa->pollhlp); |
1d14ffa9 FB |
829 | } |
830 | ||
286a5d20 | 831 | static size_t alsa_read(HWVoiceIn *hw, void *buf, size_t len) |
1d14ffa9 FB |
832 | { |
833 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
286a5d20 | 834 | size_t pos = 0; |
1d14ffa9 | 835 | |
286a5d20 KZ |
836 | while (len) { |
837 | void *dst = advance(buf, pos); | |
838 | snd_pcm_sframes_t nread; | |
571ec3d6 | 839 | |
2b9cce8c KZ |
840 | nread = snd_pcm_readi( |
841 | alsa->handle, dst, len / hw->info.bytes_per_frame); | |
571ec3d6 | 842 | |
286a5d20 KZ |
843 | if (nread <= 0) { |
844 | switch (nread) { | |
845 | case 0: | |
846 | trace_alsa_read_zero(len); | |
3a1bdd15 | 847 | return pos; |
1d14ffa9 | 848 | |
286a5d20 KZ |
849 | case -EPIPE: |
850 | if (alsa_recover(alsa->handle)) { | |
851 | alsa_logerr(nread, "Failed to read %zu frames\n", len); | |
852 | return pos; | |
1d14ffa9 | 853 | } |
286a5d20 KZ |
854 | trace_alsa_xrun_in(); |
855 | continue; | |
1d14ffa9 | 856 | |
286a5d20 KZ |
857 | case -EAGAIN: |
858 | return pos; | |
1d14ffa9 | 859 | |
286a5d20 KZ |
860 | default: |
861 | alsa_logerr(nread, "Failed to read %zu frames to %p\n", | |
862 | len, dst); | |
3a1bdd15 | 863 | return pos; |
286a5d20 | 864 | } |
1d14ffa9 | 865 | } |
286a5d20 | 866 | |
2b9cce8c KZ |
867 | pos += nread * hw->info.bytes_per_frame; |
868 | len -= nread * hw->info.bytes_per_frame; | |
1d14ffa9 FB |
869 | } |
870 | ||
286a5d20 | 871 | return pos; |
1d14ffa9 FB |
872 | } |
873 | ||
571a8c52 | 874 | static void alsa_enable_in(HWVoiceIn *hw, bool enable) |
1d14ffa9 | 875 | { |
571ec3d6 | 876 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
a93f3281 | 877 | AudiodevAlsaPerDirectionOptions *apdo = alsa->dev->u.alsa.in; |
571ec3d6 | 878 | |
571a8c52 KZ |
879 | if (enable) { |
880 | bool poll_mode = apdo->try_poll; | |
a628b869 | 881 | |
571a8c52 KZ |
882 | ldebug("enabling voice\n"); |
883 | if (poll_mode && alsa_poll_in(hw)) { | |
884 | poll_mode = 0; | |
a628b869 | 885 | } |
571a8c52 | 886 | hw->poll_mode = poll_mode; |
571ec3d6 | 887 | |
571a8c52 KZ |
888 | alsa_voice_ctl(alsa->handle, "capture", VOICE_CTL_START); |
889 | } else { | |
571ec3d6 | 890 | ldebug ("disabling voice\n"); |
8b438ba3 | 891 | if (hw->poll_mode) { |
892 | hw->poll_mode = 0; | |
571a8c52 | 893 | alsa_fini_poll(&alsa->pollhlp); |
8b438ba3 | 894 | } |
571a8c52 | 895 | alsa_voice_ctl(alsa->handle, "capture", VOICE_CTL_PAUSE); |
571ec3d6 | 896 | } |
1d14ffa9 FB |
897 | } |
898 | ||
a93f3281 KZ |
899 | static void alsa_init_per_direction(AudiodevAlsaPerDirectionOptions *apdo) |
900 | { | |
901 | if (!apdo->has_try_poll) { | |
902 | apdo->try_poll = true; | |
903 | apdo->has_try_poll = true; | |
904 | } | |
905 | } | |
765b37da | 906 | |
f6061733 | 907 | static void *alsa_audio_init(Audiodev *dev, Error **errp) |
1d14ffa9 | 908 | { |
a93f3281 KZ |
909 | AudiodevAlsaOptions *aopts; |
910 | assert(dev->driver == AUDIODEV_DRIVER_ALSA); | |
911 | ||
912 | aopts = &dev->u.alsa; | |
913 | alsa_init_per_direction(aopts->in); | |
914 | alsa_init_per_direction(aopts->out); | |
915 | ||
46744732 | 916 | /* don't set has_* so alsa_open can identify it wasn't set by the user */ |
a93f3281 | 917 | if (!dev->u.alsa.out->has_period_length) { |
46744732 VR |
918 | /* 256 frames assuming 44100Hz */ |
919 | dev->u.alsa.out->period_length = 5805; | |
a93f3281 KZ |
920 | } |
921 | if (!dev->u.alsa.out->has_buffer_length) { | |
922 | /* 4096 frames assuming 44100Hz */ | |
46744732 | 923 | dev->u.alsa.out->buffer_length = 92880; |
a93f3281 KZ |
924 | } |
925 | ||
a93f3281 | 926 | if (!dev->u.alsa.in->has_period_length) { |
5140ad82 VR |
927 | /* 256 frames assuming 44100Hz */ |
928 | dev->u.alsa.in->period_length = 5805; | |
a93f3281 KZ |
929 | } |
930 | if (!dev->u.alsa.in->has_buffer_length) { | |
5140ad82 VR |
931 | /* 4096 frames assuming 44100Hz */ |
932 | dev->u.alsa.in->buffer_length = 92880; | |
a93f3281 KZ |
933 | } |
934 | ||
935 | return dev; | |
1d14ffa9 FB |
936 | } |
937 | ||
938 | static void alsa_audio_fini (void *opaque) | |
939 | { | |
1d14ffa9 FB |
940 | } |
941 | ||
35f4b58c | 942 | static struct audio_pcm_ops alsa_pcm_ops = { |
1dd3e4d1 JQ |
943 | .init_out = alsa_init_out, |
944 | .fini_out = alsa_fini_out, | |
286a5d20 | 945 | .write = alsa_write, |
5a9d7ae2 | 946 | .buffer_get_free = alsa_buffer_get_free, |
fdc8c5f4 | 947 | .run_buffer_out = audio_generic_run_buffer_out, |
571a8c52 | 948 | .enable_out = alsa_enable_out, |
1dd3e4d1 JQ |
949 | |
950 | .init_in = alsa_init_in, | |
951 | .fini_in = alsa_fini_in, | |
286a5d20 | 952 | .read = alsa_read, |
a2893c83 | 953 | .run_buffer_in = audio_generic_run_buffer_in, |
571a8c52 | 954 | .enable_in = alsa_enable_in, |
1d14ffa9 FB |
955 | }; |
956 | ||
d3893a39 | 957 | static struct audio_driver alsa_audio_driver = { |
bee37f32 JQ |
958 | .name = "alsa", |
959 | .descr = "ALSA http://www.alsa-project.org", | |
bee37f32 JQ |
960 | .init = alsa_audio_init, |
961 | .fini = alsa_audio_fini, | |
962 | .pcm_ops = &alsa_pcm_ops, | |
bee37f32 JQ |
963 | .max_voices_out = INT_MAX, |
964 | .max_voices_in = INT_MAX, | |
965 | .voice_size_out = sizeof (ALSAVoiceOut), | |
966 | .voice_size_in = sizeof (ALSAVoiceIn) | |
1d14ffa9 | 967 | }; |
d3893a39 GH |
968 | |
969 | static void register_audio_alsa(void) | |
970 | { | |
971 | audio_driver_register(&alsa_audio_driver); | |
972 | } | |
973 | type_init(register_audio_alsa); |