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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 = { |
adf7d8fb | 61 | .buffer_size_out = 1024, |
8ead62cf FB |
62 | .pcm_name_out = "default", |
63 | .pcm_name_in = "default", | |
1d14ffa9 FB |
64 | }; |
65 | ||
66 | struct alsa_params_req { | |
ca9cc28c AZ |
67 | int freq; |
68 | snd_pcm_format_t fmt; | |
69 | int nchannels; | |
7a24c800 | 70 | int size_in_usec; |
64333899 | 71 | int override_mask; |
1d14ffa9 FB |
72 | unsigned int buffer_size; |
73 | unsigned int period_size; | |
74 | }; | |
75 | ||
76 | struct alsa_params_obt { | |
77 | int freq; | |
78 | audfmt_e fmt; | |
ca9cc28c | 79 | int endianness; |
1d14ffa9 | 80 | int nchannels; |
c0fe3827 | 81 | snd_pcm_uframes_t samples; |
1d14ffa9 FB |
82 | }; |
83 | ||
84 | static void GCC_FMT_ATTR (2, 3) alsa_logerr (int err, const char *fmt, ...) | |
85 | { | |
86 | va_list ap; | |
87 | ||
88 | va_start (ap, fmt); | |
89 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
90 | va_end (ap); | |
91 | ||
92 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
93 | } | |
94 | ||
95 | static void GCC_FMT_ATTR (3, 4) alsa_logerr2 ( | |
96 | int err, | |
97 | const char *typ, | |
98 | const char *fmt, | |
99 | ... | |
100 | ) | |
101 | { | |
102 | va_list ap; | |
103 | ||
c0fe3827 | 104 | AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ); |
1d14ffa9 FB |
105 | |
106 | va_start (ap, fmt); | |
107 | AUD_vlog (AUDIO_CAP, fmt, ap); | |
108 | va_end (ap); | |
109 | ||
110 | AUD_log (AUDIO_CAP, "Reason: %s\n", snd_strerror (err)); | |
111 | } | |
112 | ||
113 | static void alsa_anal_close (snd_pcm_t **handlep) | |
114 | { | |
115 | int err = snd_pcm_close (*handlep); | |
116 | if (err) { | |
117 | alsa_logerr (err, "Failed to close PCM handle %p\n", *handlep); | |
118 | } | |
119 | *handlep = NULL; | |
120 | } | |
121 | ||
122 | static int alsa_write (SWVoiceOut *sw, void *buf, int len) | |
123 | { | |
124 | return audio_pcm_sw_write (sw, buf, len); | |
125 | } | |
126 | ||
ca9cc28c | 127 | static snd_pcm_format_t aud_to_alsafmt (audfmt_e fmt) |
1d14ffa9 FB |
128 | { |
129 | switch (fmt) { | |
130 | case AUD_FMT_S8: | |
131 | return SND_PCM_FORMAT_S8; | |
132 | ||
133 | case AUD_FMT_U8: | |
134 | return SND_PCM_FORMAT_U8; | |
135 | ||
136 | case AUD_FMT_S16: | |
137 | return SND_PCM_FORMAT_S16_LE; | |
138 | ||
139 | case AUD_FMT_U16: | |
140 | return SND_PCM_FORMAT_U16_LE; | |
141 | ||
f941aa25 TS |
142 | case AUD_FMT_S32: |
143 | return SND_PCM_FORMAT_S32_LE; | |
144 | ||
145 | case AUD_FMT_U32: | |
146 | return SND_PCM_FORMAT_U32_LE; | |
147 | ||
1d14ffa9 FB |
148 | default: |
149 | dolog ("Internal logic error: Bad audio format %d\n", fmt); | |
150 | #ifdef DEBUG_AUDIO | |
151 | abort (); | |
152 | #endif | |
153 | return SND_PCM_FORMAT_U8; | |
154 | } | |
155 | } | |
156 | ||
ca9cc28c AZ |
157 | static int alsa_to_audfmt (snd_pcm_format_t alsafmt, audfmt_e *fmt, |
158 | int *endianness) | |
1d14ffa9 FB |
159 | { |
160 | switch (alsafmt) { | |
161 | case SND_PCM_FORMAT_S8: | |
162 | *endianness = 0; | |
163 | *fmt = AUD_FMT_S8; | |
164 | break; | |
165 | ||
166 | case SND_PCM_FORMAT_U8: | |
167 | *endianness = 0; | |
168 | *fmt = AUD_FMT_U8; | |
169 | break; | |
170 | ||
171 | case SND_PCM_FORMAT_S16_LE: | |
172 | *endianness = 0; | |
173 | *fmt = AUD_FMT_S16; | |
174 | break; | |
175 | ||
176 | case SND_PCM_FORMAT_U16_LE: | |
177 | *endianness = 0; | |
178 | *fmt = AUD_FMT_U16; | |
179 | break; | |
180 | ||
181 | case SND_PCM_FORMAT_S16_BE: | |
182 | *endianness = 1; | |
183 | *fmt = AUD_FMT_S16; | |
184 | break; | |
185 | ||
186 | case SND_PCM_FORMAT_U16_BE: | |
187 | *endianness = 1; | |
188 | *fmt = AUD_FMT_U16; | |
189 | break; | |
190 | ||
f941aa25 TS |
191 | case SND_PCM_FORMAT_S32_LE: |
192 | *endianness = 0; | |
193 | *fmt = AUD_FMT_S32; | |
194 | break; | |
195 | ||
196 | case SND_PCM_FORMAT_U32_LE: | |
197 | *endianness = 0; | |
198 | *fmt = AUD_FMT_U32; | |
199 | break; | |
200 | ||
201 | case SND_PCM_FORMAT_S32_BE: | |
202 | *endianness = 1; | |
203 | *fmt = AUD_FMT_S32; | |
204 | break; | |
205 | ||
206 | case SND_PCM_FORMAT_U32_BE: | |
207 | *endianness = 1; | |
208 | *fmt = AUD_FMT_U32; | |
209 | break; | |
210 | ||
1d14ffa9 FB |
211 | default: |
212 | dolog ("Unrecognized audio format %d\n", alsafmt); | |
213 | return -1; | |
214 | } | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
1d14ffa9 FB |
219 | static void alsa_dump_info (struct alsa_params_req *req, |
220 | struct alsa_params_obt *obt) | |
221 | { | |
222 | dolog ("parameter | requested value | obtained value\n"); | |
223 | dolog ("format | %10d | %10d\n", req->fmt, obt->fmt); | |
224 | dolog ("channels | %10d | %10d\n", | |
225 | req->nchannels, obt->nchannels); | |
226 | dolog ("frequency | %10d | %10d\n", req->freq, obt->freq); | |
227 | dolog ("============================================\n"); | |
228 | dolog ("requested: buffer size %d period size %d\n", | |
229 | req->buffer_size, req->period_size); | |
c0fe3827 | 230 | dolog ("obtained: samples %ld\n", obt->samples); |
1d14ffa9 | 231 | } |
1d14ffa9 FB |
232 | |
233 | static void alsa_set_threshold (snd_pcm_t *handle, snd_pcm_uframes_t threshold) | |
234 | { | |
235 | int err; | |
236 | snd_pcm_sw_params_t *sw_params; | |
237 | ||
238 | snd_pcm_sw_params_alloca (&sw_params); | |
239 | ||
240 | err = snd_pcm_sw_params_current (handle, sw_params); | |
241 | if (err < 0) { | |
c0fe3827 | 242 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
243 | alsa_logerr (err, "Failed to get current software parameters\n"); |
244 | return; | |
245 | } | |
246 | ||
247 | err = snd_pcm_sw_params_set_start_threshold (handle, sw_params, threshold); | |
248 | if (err < 0) { | |
c0fe3827 | 249 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
250 | alsa_logerr (err, "Failed to set software threshold to %ld\n", |
251 | threshold); | |
252 | return; | |
253 | } | |
254 | ||
255 | err = snd_pcm_sw_params (handle, sw_params); | |
256 | if (err < 0) { | |
c0fe3827 | 257 | dolog ("Could not fully initialize DAC\n"); |
1d14ffa9 FB |
258 | alsa_logerr (err, "Failed to set software parameters\n"); |
259 | return; | |
260 | } | |
261 | } | |
262 | ||
263 | static int alsa_open (int in, struct alsa_params_req *req, | |
264 | struct alsa_params_obt *obt, snd_pcm_t **handlep) | |
265 | { | |
266 | snd_pcm_t *handle; | |
267 | snd_pcm_hw_params_t *hw_params; | |
60fe76f3 | 268 | int err; |
7a24c800 | 269 | int size_in_usec; |
60fe76f3 | 270 | unsigned int freq, nchannels; |
1d14ffa9 | 271 | const char *pcm_name = in ? conf.pcm_name_in : conf.pcm_name_out; |
1d14ffa9 FB |
272 | snd_pcm_uframes_t obt_buffer_size; |
273 | const char *typ = in ? "ADC" : "DAC"; | |
ca9cc28c | 274 | snd_pcm_format_t obtfmt; |
1d14ffa9 FB |
275 | |
276 | freq = req->freq; | |
1d14ffa9 | 277 | nchannels = req->nchannels; |
7a24c800 | 278 | size_in_usec = req->size_in_usec; |
1d14ffa9 FB |
279 | |
280 | snd_pcm_hw_params_alloca (&hw_params); | |
281 | ||
282 | err = snd_pcm_open ( | |
283 | &handle, | |
284 | pcm_name, | |
285 | in ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK, | |
286 | SND_PCM_NONBLOCK | |
287 | ); | |
288 | if (err < 0) { | |
289 | alsa_logerr2 (err, typ, "Failed to open `%s':\n", pcm_name); | |
290 | return -1; | |
291 | } | |
292 | ||
293 | err = snd_pcm_hw_params_any (handle, hw_params); | |
294 | if (err < 0) { | |
295 | alsa_logerr2 (err, typ, "Failed to initialize hardware parameters\n"); | |
296 | goto err; | |
297 | } | |
298 | ||
299 | err = snd_pcm_hw_params_set_access ( | |
300 | handle, | |
301 | hw_params, | |
302 | SND_PCM_ACCESS_RW_INTERLEAVED | |
303 | ); | |
304 | if (err < 0) { | |
305 | alsa_logerr2 (err, typ, "Failed to set access type\n"); | |
306 | goto err; | |
307 | } | |
308 | ||
309 | err = snd_pcm_hw_params_set_format (handle, hw_params, req->fmt); | |
ca9cc28c | 310 | if (err < 0 && conf.verbose) { |
1d14ffa9 | 311 | alsa_logerr2 (err, typ, "Failed to set format %d\n", req->fmt); |
1d14ffa9 FB |
312 | } |
313 | ||
314 | err = snd_pcm_hw_params_set_rate_near (handle, hw_params, &freq, 0); | |
315 | if (err < 0) { | |
316 | alsa_logerr2 (err, typ, "Failed to set frequency %d\n", req->freq); | |
317 | goto err; | |
318 | } | |
319 | ||
320 | err = snd_pcm_hw_params_set_channels_near ( | |
321 | handle, | |
322 | hw_params, | |
323 | &nchannels | |
324 | ); | |
325 | if (err < 0) { | |
326 | alsa_logerr2 (err, typ, "Failed to set number of channels %d\n", | |
327 | req->nchannels); | |
328 | goto err; | |
329 | } | |
330 | ||
331 | if (nchannels != 1 && nchannels != 2) { | |
332 | alsa_logerr2 (err, typ, | |
333 | "Can not handle obtained number of channels %d\n", | |
334 | nchannels); | |
335 | goto err; | |
336 | } | |
337 | ||
7a24c800 | 338 | if (req->buffer_size) { |
f3b52983 | 339 | unsigned long obt; |
340 | ||
7a24c800 | 341 | if (size_in_usec) { |
342 | int dir = 0; | |
343 | unsigned int btime = req->buffer_size; | |
1d14ffa9 FB |
344 | |
345 | err = snd_pcm_hw_params_set_buffer_time_near ( | |
346 | handle, | |
347 | hw_params, | |
7a24c800 | 348 | &btime, |
349 | &dir | |
c0fe3827 | 350 | ); |
f3b52983 | 351 | obt = btime; |
1d14ffa9 FB |
352 | } |
353 | else { | |
7a24c800 | 354 | snd_pcm_uframes_t bsize = req->buffer_size; |
1d14ffa9 | 355 | |
7a24c800 | 356 | err = snd_pcm_hw_params_set_buffer_size_near ( |
357 | handle, | |
358 | hw_params, | |
359 | &bsize | |
360 | ); | |
f3b52983 | 361 | obt = bsize; |
7a24c800 | 362 | } |
363 | if (err < 0) { | |
364 | alsa_logerr2 (err, typ, "Failed to set buffer %s to %d\n", | |
365 | size_in_usec ? "time" : "size", req->buffer_size); | |
366 | goto err; | |
367 | } | |
f3b52983 | 368 | |
64333899 | 369 | if ((req->override_mask & 2) && (obt - req->buffer_size)) |
f3b52983 | 370 | dolog ("Requested buffer %s %u was rejected, using %lu\n", |
371 | size_in_usec ? "time" : "size", req->buffer_size, obt); | |
7a24c800 | 372 | } |
373 | ||
374 | if (req->period_size) { | |
f3b52983 | 375 | unsigned long obt; |
376 | ||
7a24c800 | 377 | if (size_in_usec) { |
378 | int dir = 0; | |
379 | unsigned int ptime = req->period_size; | |
1d14ffa9 | 380 | |
7a24c800 | 381 | err = snd_pcm_hw_params_set_period_time_near ( |
382 | handle, | |
1d14ffa9 | 383 | hw_params, |
7a24c800 | 384 | &ptime, |
385 | &dir | |
1d14ffa9 | 386 | ); |
f3b52983 | 387 | obt = ptime; |
7a24c800 | 388 | } |
389 | else { | |
a7bb29ba | 390 | int dir = 0; |
7a24c800 | 391 | snd_pcm_uframes_t psize = req->period_size; |
1d14ffa9 | 392 | |
a7bb29ba | 393 | err = snd_pcm_hw_params_set_period_size_near ( |
1d14ffa9 FB |
394 | handle, |
395 | hw_params, | |
a7bb29ba | 396 | &psize, |
397 | &dir | |
1d14ffa9 | 398 | ); |
f3b52983 | 399 | obt = psize; |
1d14ffa9 | 400 | } |
7a24c800 | 401 | |
402 | if (err < 0) { | |
403 | alsa_logerr2 (err, typ, "Failed to set period %s to %d\n", | |
404 | size_in_usec ? "time" : "size", req->period_size); | |
405 | goto err; | |
406 | } | |
f3b52983 | 407 | |
64333899 | 408 | if ((req->override_mask & 1) && (obt - req->period_size)) |
f3b52983 | 409 | dolog ("Requested period %s %u was rejected, using %lu\n", |
410 | size_in_usec ? "time" : "size", req->period_size, obt); | |
1d14ffa9 FB |
411 | } |
412 | ||
413 | err = snd_pcm_hw_params (handle, hw_params); | |
414 | if (err < 0) { | |
415 | alsa_logerr2 (err, typ, "Failed to apply audio parameters\n"); | |
416 | goto err; | |
417 | } | |
418 | ||
419 | err = snd_pcm_hw_params_get_buffer_size (hw_params, &obt_buffer_size); | |
420 | if (err < 0) { | |
421 | alsa_logerr2 (err, typ, "Failed to get buffer size\n"); | |
422 | goto err; | |
423 | } | |
424 | ||
ca9cc28c AZ |
425 | err = snd_pcm_hw_params_get_format (hw_params, &obtfmt); |
426 | if (err < 0) { | |
427 | alsa_logerr2 (err, typ, "Failed to get format\n"); | |
428 | goto err; | |
429 | } | |
430 | ||
431 | if (alsa_to_audfmt (obtfmt, &obt->fmt, &obt->endianness)) { | |
432 | dolog ("Invalid format was returned %d\n", obtfmt); | |
433 | goto err; | |
434 | } | |
435 | ||
1d14ffa9 FB |
436 | err = snd_pcm_prepare (handle); |
437 | if (err < 0) { | |
c0fe3827 | 438 | alsa_logerr2 (err, typ, "Could not prepare handle %p\n", handle); |
1d14ffa9 FB |
439 | goto err; |
440 | } | |
441 | ||
1d14ffa9 FB |
442 | if (!in && conf.threshold) { |
443 | snd_pcm_uframes_t threshold; | |
444 | int bytes_per_sec; | |
445 | ||
ca9cc28c AZ |
446 | bytes_per_sec = freq << (nchannels == 2); |
447 | ||
448 | switch (obt->fmt) { | |
449 | case AUD_FMT_S8: | |
450 | case AUD_FMT_U8: | |
451 | break; | |
452 | ||
453 | case AUD_FMT_S16: | |
454 | case AUD_FMT_U16: | |
455 | bytes_per_sec <<= 1; | |
456 | break; | |
457 | ||
458 | case AUD_FMT_S32: | |
459 | case AUD_FMT_U32: | |
460 | bytes_per_sec <<= 2; | |
461 | break; | |
462 | } | |
1d14ffa9 FB |
463 | |
464 | threshold = (conf.threshold * bytes_per_sec) / 1000; | |
465 | alsa_set_threshold (handle, threshold); | |
466 | } | |
467 | ||
1d14ffa9 FB |
468 | obt->nchannels = nchannels; |
469 | obt->freq = freq; | |
c0fe3827 | 470 | obt->samples = obt_buffer_size; |
ca9cc28c | 471 | |
1d14ffa9 FB |
472 | *handlep = handle; |
473 | ||
ca9cc28c AZ |
474 | if (conf.verbose && |
475 | (obt->fmt != req->fmt || | |
476 | obt->nchannels != req->nchannels || | |
477 | obt->freq != req->freq)) { | |
478 | dolog ("Audio paramters for %s\n", typ); | |
1d14ffa9 | 479 | alsa_dump_info (req, obt); |
1d14ffa9 FB |
480 | } |
481 | ||
482 | #ifdef DEBUG | |
483 | alsa_dump_info (req, obt); | |
484 | #endif | |
485 | return 0; | |
486 | ||
487 | err: | |
488 | alsa_anal_close (&handle); | |
489 | return -1; | |
490 | } | |
491 | ||
492 | static int alsa_recover (snd_pcm_t *handle) | |
493 | { | |
494 | int err = snd_pcm_prepare (handle); | |
495 | if (err < 0) { | |
496 | alsa_logerr (err, "Failed to prepare handle %p\n", handle); | |
497 | return -1; | |
498 | } | |
499 | return 0; | |
500 | } | |
501 | ||
571ec3d6 FB |
502 | static snd_pcm_sframes_t alsa_get_avail (snd_pcm_t *handle) |
503 | { | |
504 | snd_pcm_sframes_t avail; | |
505 | ||
506 | avail = snd_pcm_avail_update (handle); | |
507 | if (avail < 0) { | |
508 | if (avail == -EPIPE) { | |
509 | if (!alsa_recover (handle)) { | |
510 | avail = snd_pcm_avail_update (handle); | |
511 | } | |
512 | } | |
513 | ||
514 | if (avail < 0) { | |
515 | alsa_logerr (avail, | |
516 | "Could not obtain number of available frames\n"); | |
517 | return -1; | |
518 | } | |
519 | } | |
520 | ||
521 | return avail; | |
522 | } | |
523 | ||
1d14ffa9 FB |
524 | static int alsa_run_out (HWVoiceOut *hw) |
525 | { | |
526 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
527 | int rpos, live, decr; | |
528 | int samples; | |
529 | uint8_t *dst; | |
530 | st_sample_t *src; | |
531 | snd_pcm_sframes_t avail; | |
532 | ||
533 | live = audio_pcm_hw_get_live_out (hw); | |
534 | if (!live) { | |
535 | return 0; | |
536 | } | |
537 | ||
571ec3d6 | 538 | avail = alsa_get_avail (alsa->handle); |
1d14ffa9 | 539 | if (avail < 0) { |
571ec3d6 | 540 | dolog ("Could not get number of available playback frames\n"); |
1d14ffa9 FB |
541 | return 0; |
542 | } | |
543 | ||
1d14ffa9 FB |
544 | decr = audio_MIN (live, avail); |
545 | samples = decr; | |
546 | rpos = hw->rpos; | |
547 | while (samples) { | |
548 | int left_till_end_samples = hw->samples - rpos; | |
571ec3d6 | 549 | int len = audio_MIN (samples, left_till_end_samples); |
1d14ffa9 FB |
550 | snd_pcm_sframes_t written; |
551 | ||
552 | src = hw->mix_buf + rpos; | |
553 | dst = advance (alsa->pcm_buf, rpos << hw->info.shift); | |
554 | ||
571ec3d6 | 555 | hw->clip (dst, src, len); |
1d14ffa9 | 556 | |
571ec3d6 FB |
557 | while (len) { |
558 | written = snd_pcm_writei (alsa->handle, dst, len); | |
4787c71d | 559 | |
571ec3d6 | 560 | if (written <= 0) { |
4787c71d | 561 | switch (written) { |
571ec3d6 FB |
562 | case 0: |
563 | if (conf.verbose) { | |
564 | dolog ("Failed to write %d frames (wrote zero)\n", len); | |
4787c71d | 565 | } |
4787c71d FB |
566 | goto exit; |
567 | ||
571ec3d6 FB |
568 | case -EPIPE: |
569 | if (alsa_recover (alsa->handle)) { | |
570 | alsa_logerr (written, "Failed to write %d frames\n", | |
571 | len); | |
572 | goto exit; | |
573 | } | |
574 | if (conf.verbose) { | |
575 | dolog ("Recovering from playback xrun\n"); | |
576 | } | |
4787c71d FB |
577 | continue; |
578 | ||
571ec3d6 FB |
579 | case -EAGAIN: |
580 | goto exit; | |
581 | ||
4787c71d FB |
582 | default: |
583 | alsa_logerr (written, "Failed to write %d frames to %p\n", | |
571ec3d6 | 584 | len, dst); |
4787c71d | 585 | goto exit; |
1d14ffa9 | 586 | } |
1d14ffa9 | 587 | } |
1d14ffa9 | 588 | |
4787c71d FB |
589 | rpos = (rpos + written) % hw->samples; |
590 | samples -= written; | |
571ec3d6 | 591 | len -= written; |
4787c71d FB |
592 | dst = advance (dst, written << hw->info.shift); |
593 | src += written; | |
594 | } | |
1d14ffa9 FB |
595 | } |
596 | ||
597 | exit: | |
598 | hw->rpos = rpos; | |
599 | return decr; | |
600 | } | |
601 | ||
602 | static void alsa_fini_out (HWVoiceOut *hw) | |
603 | { | |
604 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
605 | ||
606 | ldebug ("alsa_fini\n"); | |
607 | alsa_anal_close (&alsa->handle); | |
608 | ||
609 | if (alsa->pcm_buf) { | |
610 | qemu_free (alsa->pcm_buf); | |
611 | alsa->pcm_buf = NULL; | |
612 | } | |
613 | } | |
614 | ||
c0fe3827 | 615 | static int alsa_init_out (HWVoiceOut *hw, audsettings_t *as) |
1d14ffa9 FB |
616 | { |
617 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; | |
618 | struct alsa_params_req req; | |
619 | struct alsa_params_obt obt; | |
1d14ffa9 | 620 | snd_pcm_t *handle; |
c0fe3827 | 621 | audsettings_t obt_as; |
1d14ffa9 | 622 | |
c0fe3827 FB |
623 | req.fmt = aud_to_alsafmt (as->fmt); |
624 | req.freq = as->freq; | |
625 | req.nchannels = as->nchannels; | |
1d14ffa9 FB |
626 | req.period_size = conf.period_size_out; |
627 | req.buffer_size = conf.buffer_size_out; | |
23fb600b | 628 | req.size_in_usec = conf.size_in_usec_out; |
64333899 | 629 | req.override_mask = !!conf.period_size_out_overridden |
630 | | (!!conf.buffer_size_out_overridden << 1); | |
1d14ffa9 FB |
631 | |
632 | if (alsa_open (0, &req, &obt, &handle)) { | |
633 | return -1; | |
634 | } | |
635 | ||
c0fe3827 FB |
636 | obt_as.freq = obt.freq; |
637 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
638 | obt_as.fmt = obt.fmt; |
639 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 640 | |
d929eba5 | 641 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 | 642 | hw->samples = obt.samples; |
1d14ffa9 | 643 | |
c0fe3827 | 644 | alsa->pcm_buf = audio_calloc (AUDIO_FUNC, obt.samples, 1 << hw->info.shift); |
1d14ffa9 | 645 | if (!alsa->pcm_buf) { |
4787c71d FB |
646 | dolog ("Could not allocate DAC buffer (%d samples, each %d bytes)\n", |
647 | hw->samples, 1 << hw->info.shift); | |
1d14ffa9 FB |
648 | alsa_anal_close (&handle); |
649 | return -1; | |
650 | } | |
651 | ||
652 | alsa->handle = handle; | |
1d14ffa9 FB |
653 | return 0; |
654 | } | |
655 | ||
571ec3d6 | 656 | static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int pause) |
1d14ffa9 FB |
657 | { |
658 | int err; | |
571ec3d6 FB |
659 | |
660 | if (pause) { | |
661 | err = snd_pcm_drop (handle); | |
662 | if (err < 0) { | |
32d448c4 | 663 | alsa_logerr (err, "Could not stop %s\n", typ); |
571ec3d6 FB |
664 | return -1; |
665 | } | |
666 | } | |
667 | else { | |
668 | err = snd_pcm_prepare (handle); | |
669 | if (err < 0) { | |
32d448c4 | 670 | alsa_logerr (err, "Could not prepare handle for %s\n", typ); |
571ec3d6 FB |
671 | return -1; |
672 | } | |
673 | } | |
674 | ||
675 | return 0; | |
676 | } | |
677 | ||
678 | static int alsa_ctl_out (HWVoiceOut *hw, int cmd, ...) | |
679 | { | |
1d14ffa9 FB |
680 | ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw; |
681 | ||
682 | switch (cmd) { | |
683 | case VOICE_ENABLE: | |
684 | ldebug ("enabling voice\n"); | |
571ec3d6 | 685 | return alsa_voice_ctl (alsa->handle, "playback", 0); |
1d14ffa9 FB |
686 | |
687 | case VOICE_DISABLE: | |
688 | ldebug ("disabling voice\n"); | |
571ec3d6 | 689 | return alsa_voice_ctl (alsa->handle, "playback", 1); |
1d14ffa9 | 690 | } |
571ec3d6 FB |
691 | |
692 | return -1; | |
1d14ffa9 FB |
693 | } |
694 | ||
c0fe3827 | 695 | static int alsa_init_in (HWVoiceIn *hw, audsettings_t *as) |
1d14ffa9 FB |
696 | { |
697 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
698 | struct alsa_params_req req; | |
699 | struct alsa_params_obt obt; | |
1d14ffa9 | 700 | snd_pcm_t *handle; |
c0fe3827 | 701 | audsettings_t obt_as; |
1d14ffa9 | 702 | |
c0fe3827 FB |
703 | req.fmt = aud_to_alsafmt (as->fmt); |
704 | req.freq = as->freq; | |
705 | req.nchannels = as->nchannels; | |
1d14ffa9 FB |
706 | req.period_size = conf.period_size_in; |
707 | req.buffer_size = conf.buffer_size_in; | |
7a24c800 | 708 | req.size_in_usec = conf.size_in_usec_in; |
64333899 | 709 | req.override_mask = !!conf.period_size_in_overridden |
710 | | (!!conf.buffer_size_in_overridden << 1); | |
1d14ffa9 FB |
711 | |
712 | if (alsa_open (1, &req, &obt, &handle)) { | |
713 | return -1; | |
714 | } | |
715 | ||
c0fe3827 FB |
716 | obt_as.freq = obt.freq; |
717 | obt_as.nchannels = obt.nchannels; | |
ca9cc28c AZ |
718 | obt_as.fmt = obt.fmt; |
719 | obt_as.endianness = obt.endianness; | |
c0fe3827 | 720 | |
d929eba5 | 721 | audio_pcm_init_info (&hw->info, &obt_as); |
c0fe3827 FB |
722 | hw->samples = obt.samples; |
723 | ||
724 | alsa->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); | |
1d14ffa9 | 725 | if (!alsa->pcm_buf) { |
4787c71d FB |
726 | dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n", |
727 | hw->samples, 1 << hw->info.shift); | |
1d14ffa9 FB |
728 | alsa_anal_close (&handle); |
729 | return -1; | |
730 | } | |
731 | ||
732 | alsa->handle = handle; | |
733 | return 0; | |
734 | } | |
735 | ||
736 | static void alsa_fini_in (HWVoiceIn *hw) | |
737 | { | |
738 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
739 | ||
740 | alsa_anal_close (&alsa->handle); | |
741 | ||
742 | if (alsa->pcm_buf) { | |
743 | qemu_free (alsa->pcm_buf); | |
744 | alsa->pcm_buf = NULL; | |
745 | } | |
746 | } | |
747 | ||
748 | static int alsa_run_in (HWVoiceIn *hw) | |
749 | { | |
750 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; | |
751 | int hwshift = hw->info.shift; | |
752 | int i; | |
753 | int live = audio_pcm_hw_get_live_in (hw); | |
754 | int dead = hw->samples - live; | |
571ec3d6 | 755 | int decr; |
1d14ffa9 FB |
756 | struct { |
757 | int add; | |
758 | int len; | |
759 | } bufs[2] = { | |
760 | { hw->wpos, 0 }, | |
761 | { 0, 0 } | |
762 | }; | |
571ec3d6 | 763 | snd_pcm_sframes_t avail; |
1d14ffa9 FB |
764 | snd_pcm_uframes_t read_samples = 0; |
765 | ||
766 | if (!dead) { | |
767 | return 0; | |
768 | } | |
769 | ||
571ec3d6 FB |
770 | avail = alsa_get_avail (alsa->handle); |
771 | if (avail < 0) { | |
772 | dolog ("Could not get number of captured frames\n"); | |
773 | return 0; | |
774 | } | |
775 | ||
776 | if (!avail && (snd_pcm_state (alsa->handle) == SND_PCM_STATE_PREPARED)) { | |
777 | avail = hw->samples; | |
778 | } | |
779 | ||
780 | decr = audio_MIN (dead, avail); | |
781 | if (!decr) { | |
782 | return 0; | |
783 | } | |
784 | ||
785 | if (hw->wpos + decr > hw->samples) { | |
1d14ffa9 | 786 | bufs[0].len = (hw->samples - hw->wpos); |
571ec3d6 | 787 | bufs[1].len = (decr - (hw->samples - hw->wpos)); |
1d14ffa9 FB |
788 | } |
789 | else { | |
571ec3d6 | 790 | bufs[0].len = decr; |
1d14ffa9 FB |
791 | } |
792 | ||
1d14ffa9 FB |
793 | for (i = 0; i < 2; ++i) { |
794 | void *src; | |
795 | st_sample_t *dst; | |
796 | snd_pcm_sframes_t nread; | |
797 | snd_pcm_uframes_t len; | |
798 | ||
799 | len = bufs[i].len; | |
800 | ||
801 | src = advance (alsa->pcm_buf, bufs[i].add << hwshift); | |
802 | dst = hw->conv_buf + bufs[i].add; | |
803 | ||
804 | while (len) { | |
805 | nread = snd_pcm_readi (alsa->handle, src, len); | |
806 | ||
571ec3d6 | 807 | if (nread <= 0) { |
1d14ffa9 | 808 | switch (nread) { |
571ec3d6 FB |
809 | case 0: |
810 | if (conf.verbose) { | |
811 | dolog ("Failed to read %ld frames (read zero)\n", len); | |
1d14ffa9 | 812 | } |
1d14ffa9 FB |
813 | goto exit; |
814 | ||
571ec3d6 FB |
815 | case -EPIPE: |
816 | if (alsa_recover (alsa->handle)) { | |
817 | alsa_logerr (nread, "Failed to read %ld frames\n", len); | |
818 | goto exit; | |
819 | } | |
820 | if (conf.verbose) { | |
821 | dolog ("Recovering from capture xrun\n"); | |
822 | } | |
1d14ffa9 FB |
823 | continue; |
824 | ||
571ec3d6 FB |
825 | case -EAGAIN: |
826 | goto exit; | |
827 | ||
1d14ffa9 FB |
828 | default: |
829 | alsa_logerr ( | |
830 | nread, | |
831 | "Failed to read %ld frames from %p\n", | |
832 | len, | |
833 | src | |
834 | ); | |
835 | goto exit; | |
836 | } | |
837 | } | |
838 | ||
839 | hw->conv (dst, src, nread, &nominal_volume); | |
840 | ||
841 | src = advance (src, nread << hwshift); | |
842 | dst += nread; | |
843 | ||
844 | read_samples += nread; | |
845 | len -= nread; | |
846 | } | |
847 | } | |
848 | ||
849 | exit: | |
850 | hw->wpos = (hw->wpos + read_samples) % hw->samples; | |
851 | return read_samples; | |
852 | } | |
853 | ||
854 | static int alsa_read (SWVoiceIn *sw, void *buf, int size) | |
855 | { | |
856 | return audio_pcm_sw_read (sw, buf, size); | |
857 | } | |
858 | ||
859 | static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...) | |
860 | { | |
571ec3d6 FB |
861 | ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw; |
862 | ||
863 | switch (cmd) { | |
864 | case VOICE_ENABLE: | |
865 | ldebug ("enabling voice\n"); | |
866 | return alsa_voice_ctl (alsa->handle, "capture", 0); | |
867 | ||
868 | case VOICE_DISABLE: | |
869 | ldebug ("disabling voice\n"); | |
870 | return alsa_voice_ctl (alsa->handle, "capture", 1); | |
871 | } | |
872 | ||
873 | return -1; | |
1d14ffa9 FB |
874 | } |
875 | ||
876 | static void *alsa_audio_init (void) | |
877 | { | |
878 | return &conf; | |
879 | } | |
880 | ||
881 | static void alsa_audio_fini (void *opaque) | |
882 | { | |
883 | (void) opaque; | |
884 | } | |
885 | ||
886 | static struct audio_option alsa_options[] = { | |
887 | {"DAC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_out, | |
888 | "DAC period/buffer size in microseconds (otherwise in frames)", NULL, 0}, | |
889 | {"DAC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_out, | |
7a24c800 | 890 | "DAC period size (0 to go with system default)", |
891 | &conf.period_size_out_overridden, 0}, | |
1d14ffa9 | 892 | {"DAC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_out, |
7a24c800 | 893 | "DAC buffer size (0 to go with system default)", |
894 | &conf.buffer_size_out_overridden, 0}, | |
1d14ffa9 FB |
895 | |
896 | {"ADC_SIZE_IN_USEC", AUD_OPT_BOOL, &conf.size_in_usec_in, | |
897 | "ADC period/buffer size in microseconds (otherwise in frames)", NULL, 0}, | |
898 | {"ADC_PERIOD_SIZE", AUD_OPT_INT, &conf.period_size_in, | |
7a24c800 | 899 | "ADC period size (0 to go with system default)", |
900 | &conf.period_size_in_overridden, 0}, | |
1d14ffa9 | 901 | {"ADC_BUFFER_SIZE", AUD_OPT_INT, &conf.buffer_size_in, |
7a24c800 | 902 | "ADC buffer size (0 to go with system default)", |
903 | &conf.buffer_size_in_overridden, 0}, | |
1d14ffa9 FB |
904 | |
905 | {"THRESHOLD", AUD_OPT_INT, &conf.threshold, | |
906 | "(undocumented)", NULL, 0}, | |
907 | ||
908 | {"DAC_DEV", AUD_OPT_STR, &conf.pcm_name_out, | |
909 | "DAC device name (for instance dmix)", NULL, 0}, | |
910 | ||
911 | {"ADC_DEV", AUD_OPT_STR, &conf.pcm_name_in, | |
912 | "ADC device name", NULL, 0}, | |
571ec3d6 FB |
913 | |
914 | {"VERBOSE", AUD_OPT_BOOL, &conf.verbose, | |
915 | "Behave in a more verbose way", NULL, 0}, | |
916 | ||
1d14ffa9 FB |
917 | {NULL, 0, NULL, NULL, NULL, 0} |
918 | }; | |
919 | ||
8869defe | 920 | static const struct audio_pcm_ops alsa_pcm_ops = { |
1d14ffa9 FB |
921 | alsa_init_out, |
922 | alsa_fini_out, | |
923 | alsa_run_out, | |
924 | alsa_write, | |
925 | alsa_ctl_out, | |
926 | ||
927 | alsa_init_in, | |
928 | alsa_fini_in, | |
929 | alsa_run_in, | |
930 | alsa_read, | |
931 | alsa_ctl_in | |
932 | }; | |
933 | ||
934 | struct audio_driver alsa_audio_driver = { | |
935 | INIT_FIELD (name = ) "alsa", | |
936 | INIT_FIELD (descr = ) "ALSA http://www.alsa-project.org", | |
937 | INIT_FIELD (options = ) alsa_options, | |
938 | INIT_FIELD (init = ) alsa_audio_init, | |
939 | INIT_FIELD (fini = ) alsa_audio_fini, | |
940 | INIT_FIELD (pcm_ops = ) &alsa_pcm_ops, | |
941 | INIT_FIELD (can_be_default = ) 1, | |
942 | INIT_FIELD (max_voices_out = ) INT_MAX, | |
943 | INIT_FIELD (max_voices_in = ) INT_MAX, | |
944 | INIT_FIELD (voice_size_out = ) sizeof (ALSAVoiceOut), | |
945 | INIT_FIELD (voice_size_in = ) sizeof (ALSAVoiceIn) | |
946 | }; |