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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 PB |
25 | #include "qemu-common.h" |
26 | #include "audio.h" | |
1d14ffa9 FB |
27 | |
28 | #define AUDIO_CAP "alsa" | |
29 | #include "audio_int.h" | |
30 | ||
31 | typedef struct ALSAVoiceOut { | |
32 | HWVoiceOut hw; | |
33 | void *pcm_buf; | |
34 | snd_pcm_t *handle; | |
1d14ffa9 FB |
35 | } ALSAVoiceOut; |
36 | ||
37 | typedef struct ALSAVoiceIn { | |
38 | HWVoiceIn hw; | |
39 | snd_pcm_t *handle; | |
40 | void *pcm_buf; | |
1d14ffa9 FB |
41 | } ALSAVoiceIn; |
42 | ||
43 | static struct { | |
44 | int size_in_usec_in; | |
45 | int size_in_usec_out; | |
46 | const char *pcm_name_in; | |
47 | const char *pcm_name_out; | |
48 | unsigned int buffer_size_in; | |
49 | unsigned int period_size_in; | |
50 | unsigned int buffer_size_out; | |
51 | unsigned int period_size_out; | |
52 | unsigned int threshold; | |
53 | ||
fe8f096b TS |
54 | int buffer_size_in_overridden; |
55 | int period_size_in_overridden; | |
1d14ffa9 | 56 | |
fe8f096b TS |
57 | int buffer_size_out_overridden; |
58 | int period_size_out_overridden; | |
571ec3d6 | 59 | int verbose; |
1d14ffa9 | 60 | } conf = { |
8ead62cf FB |
61 | .pcm_name_out = "default", |
62 | .pcm_name_in = "default", | |
1d14ffa9 FB |
63 | }; |
64 | ||
65 | struct alsa_params_req { | |
ca9cc28c AZ |
66 | int freq; |
67 | snd_pcm_format_t fmt; | |
68 | int nchannels; | |
7a24c800 | 69 | int size_in_usec; |
64333899 | 70 | int override_mask; |
1d14ffa9 FB |
71 | unsigned int buffer_size; |
72 | unsigned int period_size; | |
73 | }; | |
74 | ||
75 | struct alsa_params_obt { | |
76 | int freq; | |
77 | audfmt_e fmt; | |
ca9cc28c | 78 | int endianness; |
1d14ffa9 | 79 | int nchannels; |
c0fe3827 | 80 | snd_pcm_uframes_t samples; |
1d14ffa9 FB |
81 | }; |
82 | ||
83 | static void GCC_FMT_ATTR (2, 3) alsa_logerr (int err, const char *fmt, ...) | |
84 | { | |
85 | va_list ap; | |
86 | ||
87 | va_start (ap, fmt); | |
88 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
89 | va_end (ap); | |
90 | ||
91 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
92 | } | |
93 | ||
94 | static void GCC_FMT_ATTR (3, 4) alsa_logerr2 ( | |
95 | int err, | |
96 | const char *typ, | |
97 | const char *fmt, | |
98 | ... | |
99 | ) | |
100 | { | |
101 | va_list ap; | |
102 | ||
c0fe3827 | 103 | AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ); |
1d14ffa9 FB |
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 alsa_anal_close (snd_pcm_t **handlep) | |
113 | { | |
114 | int err = snd_pcm_close (*handlep); | |
115 | if (err) { | |
116 | alsa_logerr (err, "Failed to close PCM handle %p\n", *handlep); | |
117 | } | |
118 | *handlep = NULL; | |
119 | } | |
120 | ||
121 | static int alsa_write (SWVoiceOut *sw, void *buf, int len) | |
122 | { | |
123 | return audio_pcm_sw_write (sw, buf, len); | |
124 | } | |
125 | ||
ca9cc28c | 126 | static snd_pcm_format_t aud_to_alsafmt (audfmt_e fmt) |
1d14ffa9 FB |
127 | { |
128 | switch (fmt) { | |
129 | case AUD_FMT_S8: | |
130 | return SND_PCM_FORMAT_S8; | |
131 | ||
132 | case AUD_FMT_U8: | |
133 | return SND_PCM_FORMAT_U8; | |
134 | ||
135 | case AUD_FMT_S16: | |
136 | return SND_PCM_FORMAT_S16_LE; | |
137 | ||
138 | case AUD_FMT_U16: | |
139 | return SND_PCM_FORMAT_U16_LE; | |
140 | ||
f941aa25 TS |
141 | case AUD_FMT_S32: |
142 | return SND_PCM_FORMAT_S32_LE; | |
143 | ||
144 | case AUD_FMT_U32: | |
145 | return SND_PCM_FORMAT_U32_LE; | |
146 | ||
1d14ffa9 FB |
147 | default: |
148 | dolog ("Internal logic error: Bad audio format %d\n", fmt); | |
149 | #ifdef DEBUG_AUDIO | |
150 | abort (); | |
151 | #endif | |
152 | return SND_PCM_FORMAT_U8; | |
153 | } | |
154 | } | |
155 | ||
ca9cc28c AZ |
156 | static int alsa_to_audfmt (snd_pcm_format_t alsafmt, audfmt_e *fmt, |
157 | int *endianness) | |
1d14ffa9 FB |
158 | { |
159 | switch (alsafmt) { | |
160 | case SND_PCM_FORMAT_S8: | |
161 | *endianness = 0; | |
162 | *fmt = AUD_FMT_S8; | |
163 | break; | |
164 | ||
165 | case SND_PCM_FORMAT_U8: | |
166 | *endianness = 0; | |
167 | *fmt = AUD_FMT_U8; | |
168 | break; | |
169 | ||
170 | case SND_PCM_FORMAT_S16_LE: | |
171 | *endianness = 0; | |
172 | *fmt = AUD_FMT_S16; | |
173 | break; | |
174 | ||
175 | case SND_PCM_FORMAT_U16_LE: | |
176 | *endianness = 0; | |
177 | *fmt = AUD_FMT_U16; | |
178 | break; | |
179 | ||
180 | case SND_PCM_FORMAT_S16_BE: | |
181 | *endianness = 1; | |
182 | *fmt = AUD_FMT_S16; | |
183 | break; | |
184 | ||
185 | case SND_PCM_FORMAT_U16_BE: | |
186 | *endianness = 1; | |
187 | *fmt = AUD_FMT_U16; | |
188 | break; | |
189 | ||
f941aa25 TS |
190 | case SND_PCM_FORMAT_S32_LE: |
191 | *endianness = 0; | |
192 | *fmt = AUD_FMT_S32; | |
193 | break; | |
194 | ||
195 | case SND_PCM_FORMAT_U32_LE: | |
196 | *endianness = 0; | |
197 | *fmt = AUD_FMT_U32; | |
198 | break; | |
199 | ||
200 | case SND_PCM_FORMAT_S32_BE: | |
201 | *endianness = 1; | |
202 | *fmt = AUD_FMT_S32; | |
203 | break; | |
204 | ||
205 | case SND_PCM_FORMAT_U32_BE: | |
206 | *endianness = 1; | |
207 | *fmt = AUD_FMT_U32; | |
208 | break; | |
209 | ||
1d14ffa9 FB |
210 | default: |
211 | dolog ("Unrecognized audio format %d\n", alsafmt); | |
212 | return -1; | |
213 | } | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
1d14ffa9 FB |
218 | static void alsa_dump_info (struct alsa_params_req *req, |
219 | struct alsa_params_obt *obt) | |
220 | { | |
221 | dolog ("parameter | requested value | obtained value\n"); | |
222 | dolog ("format | %10d | %10d\n", req->fmt, obt->fmt); | |
223 | dolog ("channels | %10d | %10d\n", | |
224 | req->nchannels, obt->nchannels); | |
225 | dolog ("frequency | %10d | %10d\n", req->freq, obt->freq); | |
226 | dolog ("============================================\n"); | |
227 | dolog ("requested: buffer size %d period size %d\n", | |
228 | req->buffer_size, req->period_size); | |
c0fe3827 | 229 | dolog ("obtained: samples %ld\n", obt->samples); |
1d14ffa9 | 230 | } |
1d14ffa9 FB |
231 | |
232 | static void alsa_set_threshold (snd_pcm_t *handle, snd_pcm_uframes_t threshold) | |
233 | { | |
234 | int err; | |
235 | snd_pcm_sw_params_t *sw_params; | |
236 | ||
237 | snd_pcm_sw_params_alloca (&sw_params); | |
238 | ||
239 | err = snd_pcm_sw_params_current (handle, sw_params); | |
240 | if (err < 0) { | |
c0fe3827 | 241 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
242 | alsa_logerr (err, "Failed to get current software parameters\n"); |
243 | return; | |
244 | } | |
245 | ||
246 | err = snd_pcm_sw_params_set_start_threshold (handle, sw_params, threshold); | |
247 | if (err < 0) { | |
c0fe3827 | 248 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
249 | alsa_logerr (err, "Failed to set software threshold to %ld\n", |
250 | threshold); | |
251 | return; | |
252 | } | |
253 | ||
254 | err = snd_pcm_sw_params (handle, sw_params); | |
255 | if (err < 0) { | |
c0fe3827 | 256 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
257 | alsa_logerr (err, "Failed to set software parameters\n"); |
258 | return; | |
259 | } | |
260 | } | |
261 | ||
262 | static int alsa_open (int in, struct alsa_params_req *req, | |
263 | struct alsa_params_obt *obt, snd_pcm_t **handlep) | |
264 | { | |
265 | snd_pcm_t *handle; | |
266 | snd_pcm_hw_params_t *hw_params; | |
60fe76f3 | 267 | int err; |
7a24c800 | 268 | int size_in_usec; |
60fe76f3 | 269 | unsigned int freq, nchannels; |
1d14ffa9 | 270 | const char *pcm_name = in ? conf.pcm_name_in : conf.pcm_name_out; |
1d14ffa9 FB |
271 | snd_pcm_uframes_t obt_buffer_size; |
272 | const char *typ = in ? "ADC" : "DAC"; | |
ca9cc28c | 273 | snd_pcm_format_t obtfmt; |
1d14ffa9 FB |
274 | |
275 | freq = req->freq; | |
1d14ffa9 | 276 | nchannels = req->nchannels; |
7a24c800 | 277 | size_in_usec = req->size_in_usec; |
1d14ffa9 FB |
278 | |
279 | snd_pcm_hw_params_alloca (&hw_params); | |
280 | ||
281 | err = snd_pcm_open ( | |
282 | &handle, | |
283 | pcm_name, | |
284 | in ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK, | |
285 | SND_PCM_NONBLOCK | |
286 | ); | |
287 | if (err < 0) { | |
288 | alsa_logerr2 (err, typ, "Failed to open `%s':\n", pcm_name); | |
289 | return -1; | |
290 | } | |
291 | ||
292 | err = snd_pcm_hw_params_any (handle, hw_params); | |
293 | if (err < 0) { | |
294 | alsa_logerr2 (err, typ, "Failed to initialize hardware parameters\n"); | |
295 | goto err; | |
296 | } | |
297 | ||
298 | err = snd_pcm_hw_params_set_access ( | |
299 | handle, | |
300 | hw_params, | |
301 | SND_PCM_ACCESS_RW_INTERLEAVED | |
302 | ); | |
303 | if (err < 0) { | |
304 | alsa_logerr2 (err, typ, "Failed to set access type\n"); | |
305 | goto err; | |
306 | } | |
307 | ||
308 | err = snd_pcm_hw_params_set_format (handle, hw_params, req->fmt); | |
ca9cc28c | 309 | if (err < 0 && conf.verbose) { |
1d14ffa9 | 310 | alsa_logerr2 (err, typ, "Failed to set format %d\n", req->fmt); |
1d14ffa9 FB |
311 | } |
312 | ||
313 | err = snd_pcm_hw_params_set_rate_near (handle, hw_params, &freq, 0); | |
314 | if (err < 0) { | |
315 | alsa_logerr2 (err, typ, "Failed to set frequency %d\n", req->freq); | |
316 | goto err; | |
317 | } | |
318 | ||
319 | err = snd_pcm_hw_params_set_channels_near ( | |
320 | handle, | |
321 | hw_params, | |
322 | &nchannels | |
323 | ); | |
324 | if (err < 0) { | |
325 | alsa_logerr2 (err, typ, "Failed to set number of channels %d\n", | |
326 | req->nchannels); | |
327 | goto err; | |
328 | } | |
329 | ||
330 | if (nchannels != 1 && nchannels != 2) { | |
331 | alsa_logerr2 (err, typ, | |
332 | "Can not handle obtained number of channels %d\n", | |
333 | nchannels); | |
334 | goto err; | |
335 | } | |
336 | ||
7a24c800 | 337 | if (req->buffer_size) { |
f3b52983 | 338 | unsigned long obt; |
339 | ||
7a24c800 | 340 | if (size_in_usec) { |
341 | int dir = 0; | |
342 | unsigned int btime = req->buffer_size; | |
1d14ffa9 FB |
343 | |
344 | err = snd_pcm_hw_params_set_buffer_time_near ( | |
345 | handle, | |
346 | hw_params, | |
7a24c800 | 347 | &btime, |
348 | &dir | |
c0fe3827 | 349 | ); |
f3b52983 | 350 | obt = btime; |
1d14ffa9 FB |
351 | } |
352 | else { | |
7a24c800 | 353 | snd_pcm_uframes_t bsize = req->buffer_size; |
1d14ffa9 | 354 | |
7a24c800 | 355 | err = snd_pcm_hw_params_set_buffer_size_near ( |
356 | handle, | |
357 | hw_params, | |
358 | &bsize | |
359 | ); | |
f3b52983 | 360 | obt = bsize; |
7a24c800 | 361 | } |
362 | if (err < 0) { | |
363 | alsa_logerr2 (err, typ, "Failed to set buffer %s to %d\n", | |
364 | size_in_usec ? "time" : "size", req->buffer_size); | |
365 | goto err; | |
366 | } | |
f3b52983 | 367 | |
64333899 | 368 | if ((req->override_mask & 2) && (obt - req->buffer_size)) |
f3b52983 | 369 | dolog ("Requested buffer %s %u was rejected, using %lu\n", |
370 | size_in_usec ? "time" : "size", req->buffer_size, obt); | |
7a24c800 | 371 | } |
372 | ||
373 | if (req->period_size) { | |
f3b52983 | 374 | unsigned long obt; |
375 | ||
7a24c800 | 376 | if (size_in_usec) { |
377 | int dir = 0; | |
378 | unsigned int ptime = req->period_size; | |
1d14ffa9 | 379 | |
7a24c800 | 380 | err = snd_pcm_hw_params_set_period_time_near ( |
381 | handle, | |
1d14ffa9 | 382 | hw_params, |
7a24c800 | 383 | &ptime, |
384 | &dir | |
1d14ffa9 | 385 | ); |
f3b52983 | 386 | obt = ptime; |
7a24c800 | 387 | } |
388 | else { | |
a7bb29ba | 389 | int dir = 0; |
7a24c800 | 390 | snd_pcm_uframes_t psize = req->period_size; |
1d14ffa9 | 391 | |
a7bb29ba | 392 | err = snd_pcm_hw_params_set_period_size_near ( |
1d14ffa9 FB |
393 | handle, |
394 | hw_params, | |
a7bb29ba | 395 | &psize, |
396 | &dir | |
1d14ffa9 | 397 | ); |
f3b52983 | 398 | obt = psize; |
1d14ffa9 | 399 | } |
7a24c800 | 400 | |
401 | if (err < 0) { | |
402 | alsa_logerr2 (err, typ, "Failed to set period %s to %d\n", | |
403 | size_in_usec ? "time" : "size", req->period_size); | |
404 | goto err; | |
405 | } | |
f3b52983 | 406 | |
64333899 | 407 | if ((req->override_mask & 1) && (obt - req->period_size)) |
f3b52983 | 408 | dolog ("Requested period %s %u was rejected, using %lu\n", |
409 | size_in_usec ? "time" : "size", req->period_size, obt); | |
1d14ffa9 FB |
410 | } |
411 | ||
412 | err = snd_pcm_hw_params (handle, hw_params); | |
413 | if (err < 0) { | |
414 | alsa_logerr2 (err, typ, "Failed to apply audio parameters\n"); | |
415 | goto err; | |
416 | } | |
417 | ||
418 | err = snd_pcm_hw_params_get_buffer_size (hw_params, &obt_buffer_size); | |
419 | if (err < 0) { | |
420 | alsa_logerr2 (err, typ, "Failed to get buffer size\n"); | |
421 | goto err; | |
422 | } | |
423 | ||
ca9cc28c AZ |
424 | err = snd_pcm_hw_params_get_format (hw_params, &obtfmt); |
425 | if (err < 0) { | |
426 | alsa_logerr2 (err, typ, "Failed to get format\n"); | |
427 | goto err; | |
428 | } | |
429 | ||
430 | if (alsa_to_audfmt (obtfmt, &obt->fmt, &obt->endianness)) { | |
431 | dolog ("Invalid format was returned %d\n", obtfmt); | |
432 | goto err; | |
433 | } | |
434 | ||
1d14ffa9 FB |
435 | err = snd_pcm_prepare (handle); |
436 | if (err < 0) { | |
c0fe3827 | 437 | alsa_logerr2 (err, typ, "Could not prepare handle %p\n", handle); |
1d14ffa9 FB |
438 | goto err; |
439 | } | |
440 | ||
1d14ffa9 FB |
441 | if (!in && conf.threshold) { |
442 | snd_pcm_uframes_t threshold; | |
443 | int bytes_per_sec; | |
444 | ||
ca9cc28c AZ |
445 | bytes_per_sec = freq << (nchannels == 2); |
446 | ||
447 | switch (obt->fmt) { | |
448 | case AUD_FMT_S8: | |
449 | case AUD_FMT_U8: | |
450 | break; | |
451 | ||
452 | case AUD_FMT_S16: | |
453 | case AUD_FMT_U16: | |
454 | bytes_per_sec <<= 1; | |
455 | break; | |
456 | ||
457 | case AUD_FMT_S32: | |
458 | case AUD_FMT_U32: | |
459 | bytes_per_sec <<= 2; | |
460 | break; | |
461 | } | |
1d14ffa9 FB |
462 | |
463 | threshold = (conf.threshold * bytes_per_sec) / 1000; | |
464 | alsa_set_threshold (handle, threshold); | |
465 | } | |
466 | ||
1d14ffa9 FB |
467 | obt->nchannels = nchannels; |
468 | obt->freq = freq; | |
c0fe3827 | 469 | obt->samples = obt_buffer_size; |
ca9cc28c | 470 | |
1d14ffa9 FB |
471 | *handlep = handle; |
472 | ||
ca9cc28c AZ |
473 | if (conf.verbose && |
474 | (obt->fmt != req->fmt || | |
475 | obt->nchannels != req->nchannels || | |
476 | obt->freq != req->freq)) { | |
477 | dolog ("Audio paramters for %s\n", typ); | |
1d14ffa9 | 478 | alsa_dump_info (req, obt); |
1d14ffa9 FB |
479 | } |
480 | ||
481 | #ifdef DEBUG | |
482 | alsa_dump_info (req, obt); | |
483 | #endif | |
484 | return 0; | |
485 | ||
486 | err: | |
487 | alsa_anal_close (&handle); | |
488 | return -1; | |
489 | } | |
490 | ||
491 | static int alsa_recover (snd_pcm_t *handle) | |
492 | { | |
493 | int err = snd_pcm_prepare (handle); | |
494 | if (err < 0) { | |
495 | alsa_logerr (err, "Failed to prepare handle %p\n", handle); | |
496 | return -1; | |
497 | } | |
498 | return 0; | |
499 | } | |
500 | ||
571ec3d6 FB |
501 | static snd_pcm_sframes_t alsa_get_avail (snd_pcm_t *handle) |
502 | { | |
503 | snd_pcm_sframes_t avail; | |
504 | ||
505 | avail = snd_pcm_avail_update (handle); | |
506 | if (avail < 0) { | |
507 | if (avail == -EPIPE) { | |
508 | if (!alsa_recover (handle)) { | |
509 | avail = snd_pcm_avail_update (handle); | |
510 | } | |
511 | } | |
512 | ||
513 | if (avail < 0) { | |
514 | alsa_logerr (avail, | |
515 | "Could not obtain number of available frames\n"); | |
516 | return -1; | |
517 | } | |
518 | } | |
519 | ||
520 | return avail; | |
521 | } | |
522 | ||
1d14ffa9 FB |
523 | static int alsa_run_out (HWVoiceOut *hw) |
524 | { | |
525 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
526 | int rpos, live, decr; | |
527 | int samples; | |
528 | uint8_t *dst; | |
529 | st_sample_t *src; | |
530 | snd_pcm_sframes_t avail; | |
531 | ||
532 | live = audio_pcm_hw_get_live_out (hw); | |
533 | if (!live) { | |
534 | return 0; | |
535 | } | |
536 | ||
571ec3d6 | 537 | avail = alsa_get_avail (alsa->handle); |
1d14ffa9 | 538 | if (avail < 0) { |
571ec3d6 | 539 | dolog ("Could not get number of available playback frames\n"); |
1d14ffa9 FB |
540 | return 0; |
541 | } | |
542 | ||
1d14ffa9 FB |
543 | decr = audio_MIN (live, avail); |
544 | samples = decr; | |
545 | rpos = hw->rpos; | |
546 | while (samples) { | |
547 | int left_till_end_samples = hw->samples - rpos; | |
571ec3d6 | 548 | int len = audio_MIN (samples, left_till_end_samples); |
1d14ffa9 FB |
549 | snd_pcm_sframes_t written; |
550 | ||
551 | src = hw->mix_buf + rpos; | |
552 | dst = advance (alsa->pcm_buf, rpos << hw->info.shift); | |
553 | ||
571ec3d6 | 554 | hw->clip (dst, src, len); |
1d14ffa9 | 555 | |
571ec3d6 FB |
556 | while (len) { |
557 | written = snd_pcm_writei (alsa->handle, dst, len); | |
4787c71d | 558 | |
571ec3d6 | 559 | if (written <= 0) { |
4787c71d | 560 | switch (written) { |
571ec3d6 FB |
561 | case 0: |
562 | if (conf.verbose) { | |
563 | dolog ("Failed to write %d frames (wrote zero)\n", len); | |
4787c71d | 564 | } |
4787c71d FB |
565 | goto exit; |
566 | ||
571ec3d6 FB |
567 | case -EPIPE: |
568 | if (alsa_recover (alsa->handle)) { | |
569 | alsa_logerr (written, "Failed to write %d frames\n", | |
570 | len); | |
571 | goto exit; | |
572 | } | |
573 | if (conf.verbose) { | |
574 | dolog ("Recovering from playback xrun\n"); | |
575 | } | |
4787c71d FB |
576 | continue; |
577 | ||
571ec3d6 FB |
578 | case -EAGAIN: |
579 | goto exit; | |
580 | ||
4787c71d FB |
581 | default: |
582 | alsa_logerr (written, "Failed to write %d frames to %p\n", | |
571ec3d6 | 583 | len, dst); |
4787c71d | 584 | goto exit; |
1d14ffa9 | 585 | } |
1d14ffa9 | 586 | } |
1d14ffa9 | 587 | |
4787c71d FB |
588 | rpos = (rpos + written) % hw->samples; |
589 | samples -= written; | |
571ec3d6 | 590 | len -= written; |
4787c71d FB |
591 | dst = advance (dst, written << hw->info.shift); |
592 | src += written; | |
593 | } | |
1d14ffa9 FB |
594 | } |
595 | ||
596 | exit: | |
597 | hw->rpos = rpos; | |
598 | return decr; | |
599 | } | |
600 | ||
601 | static void alsa_fini_out (HWVoiceOut *hw) | |
602 | { | |
603 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
604 | ||
605 | ldebug ("alsa_fini\n"); | |
606 | alsa_anal_close (&alsa->handle); | |
607 | ||
608 | if (alsa->pcm_buf) { | |
609 | qemu_free (alsa->pcm_buf); | |
610 | alsa->pcm_buf = NULL; | |
611 | } | |
612 | } | |
613 | ||
c0fe3827 | 614 | static int alsa_init_out (HWVoiceOut *hw, audsettings_t *as) |
1d14ffa9 FB |
615 | { |
616 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
617 | struct alsa_params_req req; | |
618 | struct alsa_params_obt obt; | |
1d14ffa9 | 619 | snd_pcm_t *handle; |
c0fe3827 | 620 | audsettings_t obt_as; |
1d14ffa9 | 621 | |
c0fe3827 FB |
622 | req.fmt = aud_to_alsafmt (as->fmt); |
623 | req.freq = as->freq; | |
624 | req.nchannels = as->nchannels; | |
1d14ffa9 FB |
625 | req.period_size = conf.period_size_out; |
626 | req.buffer_size = conf.buffer_size_out; | |
23fb600b | 627 | req.size_in_usec = conf.size_in_usec_out; |
64333899 | 628 | req.override_mask = !!conf.period_size_out_overridden |
629 | | (!!conf.buffer_size_out_overridden << 1); | |
1d14ffa9 FB |
630 | |
631 | if (alsa_open (0, &req, &obt, &handle)) { | |
632 | return -1; | |
633 | } | |
634 | ||
c0fe3827 FB |
635 | obt_as.freq = obt.freq; |
636 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
637 | obt_as.fmt = obt.fmt; |
638 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 639 | |
d929eba5 | 640 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 641 | hw->samples = obt.samples; |
1d14ffa9 | 642 | |
c0fe3827 | 643 | alsa->pcm_buf = audio_calloc (AUDIO_FUNC, obt.samples, 1 << hw->info.shift); |
1d14ffa9 | 644 | if (!alsa->pcm_buf) { |
4787c71d FB |
645 | dolog ("Could not allocate DAC buffer (%d samples, each %d bytes)\n", |
646 | hw->samples, 1 << hw->info.shift); | |
1d14ffa9 FB |
647 | alsa_anal_close (&handle); |
648 | return -1; | |
649 | } | |
650 | ||
651 | alsa->handle = handle; | |
1d14ffa9 FB |
652 | return 0; |
653 | } | |
654 | ||
571ec3d6 | 655 | static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int pause) |
1d14ffa9 FB |
656 | { |
657 | int err; | |
571ec3d6 FB |
658 | |
659 | if (pause) { | |
660 | err = snd_pcm_drop (handle); | |
661 | if (err < 0) { | |
32d448c4 | 662 | alsa_logerr (err, "Could not stop %s\n", typ); |
571ec3d6 FB |
663 | return -1; |
664 | } | |
665 | } | |
666 | else { | |
667 | err = snd_pcm_prepare (handle); | |
668 | if (err < 0) { | |
32d448c4 | 669 | alsa_logerr (err, "Could not prepare handle for %s\n", typ); |
571ec3d6 FB |
670 | return -1; |
671 | } | |
672 | } | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
677 | static int alsa_ctl_out (HWVoiceOut *hw, int cmd, ...) | |
678 | { | |
1d14ffa9 FB |
679 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
680 | ||
681 | switch (cmd) { | |
682 | case VOICE_ENABLE: | |
683 | ldebug ("enabling voice\n"); | |
571ec3d6 | 684 | return alsa_voice_ctl (alsa->handle, "playback", 0); |
1d14ffa9 FB |
685 | |
686 | case VOICE_DISABLE: | |
687 | ldebug ("disabling voice\n"); | |
571ec3d6 | 688 | return alsa_voice_ctl (alsa->handle, "playback", 1); |
1d14ffa9 | 689 | } |
571ec3d6 FB |
690 | |
691 | return -1; | |
1d14ffa9 FB |
692 | } |
693 | ||
c0fe3827 | 694 | static int alsa_init_in (HWVoiceIn *hw, audsettings_t *as) |
1d14ffa9 FB |
695 | { |
696 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
697 | struct alsa_params_req req; | |
698 | struct alsa_params_obt obt; | |
1d14ffa9 | 699 | snd_pcm_t *handle; |
c0fe3827 | 700 | audsettings_t obt_as; |
1d14ffa9 | 701 | |
c0fe3827 FB |
702 | req.fmt = aud_to_alsafmt (as->fmt); |
703 | req.freq = as->freq; | |
704 | req.nchannels = as->nchannels; | |
1d14ffa9 FB |
705 | req.period_size = conf.period_size_in; |
706 | req.buffer_size = conf.buffer_size_in; | |
7a24c800 | 707 | req.size_in_usec = conf.size_in_usec_in; |
64333899 | 708 | req.override_mask = !!conf.period_size_in_overridden |
709 | | (!!conf.buffer_size_in_overridden << 1); | |
1d14ffa9 FB |
710 | |
711 | if (alsa_open (1, &req, &obt, &handle)) { | |
712 | return -1; | |
713 | } | |
714 | ||
c0fe3827 FB |
715 | obt_as.freq = obt.freq; |
716 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
717 | obt_as.fmt = obt.fmt; |
718 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 719 | |
d929eba5 | 720 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 FB |
721 | hw->samples = obt.samples; |
722 | ||
723 | alsa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); | |
1d14ffa9 | 724 | if (!alsa->pcm_buf) { |
4787c71d FB |
725 | dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n", |
726 | hw->samples, 1 << hw->info.shift); | |
1d14ffa9 FB |
727 | alsa_anal_close (&handle); |
728 | return -1; | |
729 | } | |
730 | ||
731 | alsa->handle = handle; | |
732 | return 0; | |
733 | } | |
734 | ||
735 | static void alsa_fini_in (HWVoiceIn *hw) | |
736 | { | |
737 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
738 | ||
739 | alsa_anal_close (&alsa->handle); | |
740 | ||
741 | if (alsa->pcm_buf) { | |
742 | qemu_free (alsa->pcm_buf); | |
743 | alsa->pcm_buf = NULL; | |
744 | } | |
745 | } | |
746 | ||
747 | static int alsa_run_in (HWVoiceIn *hw) | |
748 | { | |
749 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
750 | int hwshift = hw->info.shift; | |
751 | int i; | |
752 | int live = audio_pcm_hw_get_live_in (hw); | |
753 | int dead = hw->samples - live; | |
571ec3d6 | 754 | int decr; |
1d14ffa9 FB |
755 | struct { |
756 | int add; | |
757 | int len; | |
758 | } bufs[2] = { | |
759 | { hw->wpos, 0 }, | |
760 | { 0, 0 } | |
761 | }; | |
571ec3d6 | 762 | snd_pcm_sframes_t avail; |
1d14ffa9 FB |
763 | snd_pcm_uframes_t read_samples = 0; |
764 | ||
765 | if (!dead) { | |
766 | return 0; | |
767 | } | |
768 | ||
571ec3d6 FB |
769 | avail = alsa_get_avail (alsa->handle); |
770 | if (avail < 0) { | |
771 | dolog ("Could not get number of captured frames\n"); | |
772 | return 0; | |
773 | } | |
774 | ||
775 | if (!avail && (snd_pcm_state (alsa->handle) == SND_PCM_STATE_PREPARED)) { | |
776 | avail = hw->samples; | |
777 | } | |
778 | ||
779 | decr = audio_MIN (dead, avail); | |
780 | if (!decr) { | |
781 | return 0; | |
782 | } | |
783 | ||
784 | if (hw->wpos + decr > hw->samples) { | |
1d14ffa9 | 785 | bufs[0].len = (hw->samples - hw->wpos); |
571ec3d6 | 786 | bufs[1].len = (decr - (hw->samples - hw->wpos)); |
1d14ffa9 FB |
787 | } |
788 | else { | |
571ec3d6 | 789 | bufs[0].len = decr; |
1d14ffa9 FB |
790 | } |
791 | ||
1d14ffa9 FB |
792 | for (i = 0; i < 2; ++i) { |
793 | void *src; | |
794 | st_sample_t *dst; | |
795 | snd_pcm_sframes_t nread; | |
796 | snd_pcm_uframes_t len; | |
797 | ||
798 | len = bufs[i].len; | |
799 | ||
800 | src = advance (alsa->pcm_buf, bufs[i].add << hwshift); | |
801 | dst = hw->conv_buf + bufs[i].add; | |
802 | ||
803 | while (len) { | |
804 | nread = snd_pcm_readi (alsa->handle, src, len); | |
805 | ||
571ec3d6 | 806 | if (nread <= 0) { |
1d14ffa9 | 807 | switch (nread) { |
571ec3d6 FB |
808 | case 0: |
809 | if (conf.verbose) { | |
810 | dolog ("Failed to read %ld frames (read zero)\n", len); | |
1d14ffa9 | 811 | } |
1d14ffa9 FB |
812 | goto exit; |
813 | ||
571ec3d6 FB |
814 | case -EPIPE: |
815 | if (alsa_recover (alsa->handle)) { | |
816 | alsa_logerr (nread, "Failed to read %ld frames\n", len); | |
817 | goto exit; | |
818 | } | |
819 | if (conf.verbose) { | |
820 | dolog ("Recovering from capture xrun\n"); | |
821 | } | |
1d14ffa9 FB |
822 | continue; |
823 | ||
571ec3d6 FB |
824 | case -EAGAIN: |
825 | goto exit; | |
826 | ||
1d14ffa9 FB |
827 | default: |
828 | alsa_logerr ( | |
829 | nread, | |
830 | "Failed to read %ld frames from %p\n", | |
831 | len, | |
832 | src | |
833 | ); | |
834 | goto exit; | |
835 | } | |
836 | } | |
837 | ||
838 | hw->conv (dst, src, nread, &nominal_volume); | |
839 | ||
840 | src = advance (src, nread << hwshift); | |
841 | dst += nread; | |
842 | ||
843 | read_samples += nread; | |
844 | len -= nread; | |
845 | } | |
846 | } | |
847 | ||
848 | exit: | |
849 | hw->wpos = (hw->wpos + read_samples) % hw->samples; | |
850 | return read_samples; | |
851 | } | |
852 | ||
853 | static int alsa_read (SWVoiceIn *sw, void *buf, int size) | |
854 | { | |
855 | return audio_pcm_sw_read (sw, buf, size); | |
856 | } | |
857 | ||
858 | static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...) | |
859 | { | |
571ec3d6 FB |
860 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
861 | ||
862 | switch (cmd) { | |
863 | case VOICE_ENABLE: | |
864 | ldebug ("enabling voice\n"); | |
865 | return alsa_voice_ctl (alsa->handle, "capture", 0); | |
866 | ||
867 | case VOICE_DISABLE: | |
868 | ldebug ("disabling voice\n"); | |
869 | return alsa_voice_ctl (alsa->handle, "capture", 1); | |
870 | } | |
871 | ||
872 | return -1; | |
1d14ffa9 FB |
873 | } |
874 | ||
875 | static void *alsa_audio_init (void) | |
876 | { | |
877 | return &conf; | |
878 | } | |
879 | ||
880 | static void alsa_audio_fini (void *opaque) | |
881 | { | |
882 | (void) opaque; | |
883 | } | |
884 | ||
885 | static struct audio_option alsa_options[] = { | |
886 | {"DAC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_out, | |
887 | "DAC period/buffer size in microseconds (otherwise in frames)", NULL, 0}, | |
888 | {"DAC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_out, | |
7a24c800 | 889 | "DAC period size (0 to go with system default)", |
890 | &conf.period_size_out_overridden, 0}, | |
1d14ffa9 | 891 | {"DAC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_out, |
7a24c800 | 892 | "DAC buffer size (0 to go with system default)", |
893 | &conf.buffer_size_out_overridden, 0}, | |
1d14ffa9 FB |
894 | |
895 | {"ADC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_in, | |
896 | "ADC period/buffer size in microseconds (otherwise in frames)", NULL, 0}, | |
897 | {"ADC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_in, | |
7a24c800 | 898 | "ADC period size (0 to go with system default)", |
899 | &conf.period_size_in_overridden, 0}, | |
1d14ffa9 | 900 | {"ADC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_in, |
7a24c800 | 901 | "ADC buffer size (0 to go with system default)", |
902 | &conf.buffer_size_in_overridden, 0}, | |
1d14ffa9 FB |
903 | |
904 | {"THRESHOLD", AUD_OPT_INT, &conf.threshold, | |
905 | "(undocumented)", NULL, 0}, | |
906 | ||
907 | {"DAC_DEV", AUD_OPT_STR, &conf.pcm_name_out, | |
908 | "DAC device name (for instance dmix)", NULL, 0}, | |
909 | ||
910 | {"ADC_DEV", AUD_OPT_STR, &conf.pcm_name_in, | |
911 | "ADC device name", NULL, 0}, | |
571ec3d6 FB |
912 | |
913 | {"VERBOSE", AUD_OPT_BOOL, &conf.verbose, | |
914 | "Behave in a more verbose way", NULL, 0}, | |
915 | ||
1d14ffa9 FB |
916 | {NULL, 0, NULL, NULL, NULL, 0} |
917 | }; | |
918 | ||
919 | static struct audio_pcm_ops alsa_pcm_ops = { | |
920 | alsa_init_out, | |
921 | alsa_fini_out, | |
922 | alsa_run_out, | |
923 | alsa_write, | |
924 | alsa_ctl_out, | |
925 | ||
926 | alsa_init_in, | |
927 | alsa_fini_in, | |
928 | alsa_run_in, | |
929 | alsa_read, | |
930 | alsa_ctl_in | |
931 | }; | |
932 | ||
933 | struct audio_driver alsa_audio_driver = { | |
934 | INIT_FIELD (name = ) "alsa", | |
935 | INIT_FIELD (descr = ) "ALSA http://www.alsa-project.org", | |
936 | INIT_FIELD (options = ) alsa_options, | |
937 | INIT_FIELD (init = ) alsa_audio_init, | |
938 | INIT_FIELD (fini = ) alsa_audio_fini, | |
939 | INIT_FIELD (pcm_ops = ) &alsa_pcm_ops, | |
940 | INIT_FIELD (can_be_default = ) 1, | |
941 | INIT_FIELD (max_voices_out = ) INT_MAX, | |
942 | INIT_FIELD (max_voices_in = ) INT_MAX, | |
943 | INIT_FIELD (voice_size_out = ) sizeof (ALSAVoiceOut), | |
944 | INIT_FIELD (voice_size_in = ) sizeof (ALSAVoiceIn) | |
945 | }; |