Merge remote-tracking branch 'remotes/dgilbert-gitlab/tags/pull-virtiofs-20210304...
[qemu.git] / audio / audio.c
1 /*
2 * QEMU Audio subsystem
3 *
4 * Copyright (c) 2003-2005 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
25 #include "qemu/osdep.h"
26 #include "audio.h"
27 #include "migration/vmstate.h"
28 #include "monitor/monitor.h"
29 #include "qemu/timer.h"
30 #include "qapi/error.h"
31 #include "qapi/qobject-input-visitor.h"
32 #include "qapi/qapi-visit-audio.h"
33 #include "qemu/cutils.h"
34 #include "qemu/module.h"
35 #include "sysemu/replay.h"
36 #include "sysemu/runstate.h"
37 #include "ui/qemu-spice.h"
38 #include "trace.h"
39
40 #define AUDIO_CAP "audio"
41 #include "audio_int.h"
42
43 /* #define DEBUG_LIVE */
44 /* #define DEBUG_OUT */
45 /* #define DEBUG_CAPTURE */
46 /* #define DEBUG_POLL */
47
48 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
49
50
51 /* Order of CONFIG_AUDIO_DRIVERS is import.
52 The 1st one is the one used by default, that is the reason
53 that we generate the list.
54 */
55 const char *audio_prio_list[] = {
56 "spice",
57 CONFIG_AUDIO_DRIVERS
58 "none",
59 "wav",
60 NULL
61 };
62
63 static QLIST_HEAD(, audio_driver) audio_drivers;
64 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs);
65
66 void audio_driver_register(audio_driver *drv)
67 {
68 QLIST_INSERT_HEAD(&audio_drivers, drv, next);
69 }
70
71 audio_driver *audio_driver_lookup(const char *name)
72 {
73 struct audio_driver *d;
74
75 QLIST_FOREACH(d, &audio_drivers, next) {
76 if (strcmp(name, d->name) == 0) {
77 return d;
78 }
79 }
80
81 audio_module_load_one(name);
82 QLIST_FOREACH(d, &audio_drivers, next) {
83 if (strcmp(name, d->name) == 0) {
84 return d;
85 }
86 }
87
88 return NULL;
89 }
90
91 static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states =
92 QTAILQ_HEAD_INITIALIZER(audio_states);
93
94 const struct mixeng_volume nominal_volume = {
95 .mute = 0,
96 #ifdef FLOAT_MIXENG
97 .r = 1.0,
98 .l = 1.0,
99 #else
100 .r = 1ULL << 32,
101 .l = 1ULL << 32,
102 #endif
103 };
104
105 static bool legacy_config = true;
106
107 int audio_bug (const char *funcname, int cond)
108 {
109 if (cond) {
110 static int shown;
111
112 AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
113 if (!shown) {
114 shown = 1;
115 AUD_log (NULL, "Save all your work and restart without audio\n");
116 AUD_log (NULL, "I am sorry\n");
117 }
118 AUD_log (NULL, "Context:\n");
119 abort();
120 }
121
122 return cond;
123 }
124
125 static inline int audio_bits_to_index (int bits)
126 {
127 switch (bits) {
128 case 8:
129 return 0;
130
131 case 16:
132 return 1;
133
134 case 32:
135 return 2;
136
137 default:
138 audio_bug ("bits_to_index", 1);
139 AUD_log (NULL, "invalid bits %d\n", bits);
140 return 0;
141 }
142 }
143
144 void *audio_calloc (const char *funcname, int nmemb, size_t size)
145 {
146 int cond;
147 size_t len;
148
149 len = nmemb * size;
150 cond = !nmemb || !size;
151 cond |= nmemb < 0;
152 cond |= len < size;
153
154 if (audio_bug ("audio_calloc", cond)) {
155 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
156 funcname);
157 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
158 return NULL;
159 }
160
161 return g_malloc0 (len);
162 }
163
164 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
165 {
166 if (cap) {
167 fprintf(stderr, "%s: ", cap);
168 }
169
170 vfprintf(stderr, fmt, ap);
171 }
172
173 void AUD_log (const char *cap, const char *fmt, ...)
174 {
175 va_list ap;
176
177 va_start (ap, fmt);
178 AUD_vlog (cap, fmt, ap);
179 va_end (ap);
180 }
181
182 static void audio_print_settings (struct audsettings *as)
183 {
184 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
185
186 switch (as->fmt) {
187 case AUDIO_FORMAT_S8:
188 AUD_log (NULL, "S8");
189 break;
190 case AUDIO_FORMAT_U8:
191 AUD_log (NULL, "U8");
192 break;
193 case AUDIO_FORMAT_S16:
194 AUD_log (NULL, "S16");
195 break;
196 case AUDIO_FORMAT_U16:
197 AUD_log (NULL, "U16");
198 break;
199 case AUDIO_FORMAT_S32:
200 AUD_log (NULL, "S32");
201 break;
202 case AUDIO_FORMAT_U32:
203 AUD_log (NULL, "U32");
204 break;
205 case AUDIO_FORMAT_F32:
206 AUD_log (NULL, "F32");
207 break;
208 default:
209 AUD_log (NULL, "invalid(%d)", as->fmt);
210 break;
211 }
212
213 AUD_log (NULL, " endianness=");
214 switch (as->endianness) {
215 case 0:
216 AUD_log (NULL, "little");
217 break;
218 case 1:
219 AUD_log (NULL, "big");
220 break;
221 default:
222 AUD_log (NULL, "invalid");
223 break;
224 }
225 AUD_log (NULL, "\n");
226 }
227
228 static int audio_validate_settings (struct audsettings *as)
229 {
230 int invalid;
231
232 invalid = as->nchannels < 1;
233 invalid |= as->endianness != 0 && as->endianness != 1;
234
235 switch (as->fmt) {
236 case AUDIO_FORMAT_S8:
237 case AUDIO_FORMAT_U8:
238 case AUDIO_FORMAT_S16:
239 case AUDIO_FORMAT_U16:
240 case AUDIO_FORMAT_S32:
241 case AUDIO_FORMAT_U32:
242 case AUDIO_FORMAT_F32:
243 break;
244 default:
245 invalid = 1;
246 break;
247 }
248
249 invalid |= as->freq <= 0;
250 return invalid ? -1 : 0;
251 }
252
253 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
254 {
255 int bits = 8;
256 bool is_signed = false, is_float = false;
257
258 switch (as->fmt) {
259 case AUDIO_FORMAT_S8:
260 is_signed = true;
261 /* fall through */
262 case AUDIO_FORMAT_U8:
263 break;
264
265 case AUDIO_FORMAT_S16:
266 is_signed = true;
267 /* fall through */
268 case AUDIO_FORMAT_U16:
269 bits = 16;
270 break;
271
272 case AUDIO_FORMAT_F32:
273 is_float = true;
274 /* fall through */
275 case AUDIO_FORMAT_S32:
276 is_signed = true;
277 /* fall through */
278 case AUDIO_FORMAT_U32:
279 bits = 32;
280 break;
281
282 default:
283 abort();
284 }
285 return info->freq == as->freq
286 && info->nchannels == as->nchannels
287 && info->is_signed == is_signed
288 && info->is_float == is_float
289 && info->bits == bits
290 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
291 }
292
293 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
294 {
295 int bits = 8, mul;
296 bool is_signed = false, is_float = false;
297
298 switch (as->fmt) {
299 case AUDIO_FORMAT_S8:
300 is_signed = true;
301 /* fall through */
302 case AUDIO_FORMAT_U8:
303 mul = 1;
304 break;
305
306 case AUDIO_FORMAT_S16:
307 is_signed = true;
308 /* fall through */
309 case AUDIO_FORMAT_U16:
310 bits = 16;
311 mul = 2;
312 break;
313
314 case AUDIO_FORMAT_F32:
315 is_float = true;
316 /* fall through */
317 case AUDIO_FORMAT_S32:
318 is_signed = true;
319 /* fall through */
320 case AUDIO_FORMAT_U32:
321 bits = 32;
322 mul = 4;
323 break;
324
325 default:
326 abort();
327 }
328
329 info->freq = as->freq;
330 info->bits = bits;
331 info->is_signed = is_signed;
332 info->is_float = is_float;
333 info->nchannels = as->nchannels;
334 info->bytes_per_frame = as->nchannels * mul;
335 info->bytes_per_second = info->freq * info->bytes_per_frame;
336 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
337 }
338
339 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
340 {
341 if (!len) {
342 return;
343 }
344
345 if (info->is_signed || info->is_float) {
346 memset(buf, 0x00, len * info->bytes_per_frame);
347 } else {
348 switch (info->bits) {
349 case 8:
350 memset(buf, 0x80, len * info->bytes_per_frame);
351 break;
352
353 case 16:
354 {
355 int i;
356 uint16_t *p = buf;
357 short s = INT16_MAX;
358
359 if (info->swap_endianness) {
360 s = bswap16 (s);
361 }
362
363 for (i = 0; i < len * info->nchannels; i++) {
364 p[i] = s;
365 }
366 }
367 break;
368
369 case 32:
370 {
371 int i;
372 uint32_t *p = buf;
373 int32_t s = INT32_MAX;
374
375 if (info->swap_endianness) {
376 s = bswap32 (s);
377 }
378
379 for (i = 0; i < len * info->nchannels; i++) {
380 p[i] = s;
381 }
382 }
383 break;
384
385 default:
386 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
387 info->bits);
388 break;
389 }
390 }
391 }
392
393 /*
394 * Capture
395 */
396 static void noop_conv (struct st_sample *dst, const void *src, int samples)
397 {
398 (void) src;
399 (void) dst;
400 (void) samples;
401 }
402
403 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s,
404 struct audsettings *as)
405 {
406 CaptureVoiceOut *cap;
407
408 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
409 if (audio_pcm_info_eq (&cap->hw.info, as)) {
410 return cap;
411 }
412 }
413 return NULL;
414 }
415
416 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
417 {
418 struct capture_callback *cb;
419
420 #ifdef DEBUG_CAPTURE
421 dolog ("notification %d sent\n", cmd);
422 #endif
423 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
424 cb->ops.notify (cb->opaque, cmd);
425 }
426 }
427
428 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
429 {
430 if (cap->hw.enabled != enabled) {
431 audcnotification_e cmd;
432 cap->hw.enabled = enabled;
433 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
434 audio_notify_capture (cap, cmd);
435 }
436 }
437
438 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
439 {
440 HWVoiceOut *hw = &cap->hw;
441 SWVoiceOut *sw;
442 int enabled = 0;
443
444 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
445 if (sw->active) {
446 enabled = 1;
447 break;
448 }
449 }
450 audio_capture_maybe_changed (cap, enabled);
451 }
452
453 static void audio_detach_capture (HWVoiceOut *hw)
454 {
455 SWVoiceCap *sc = hw->cap_head.lh_first;
456
457 while (sc) {
458 SWVoiceCap *sc1 = sc->entries.le_next;
459 SWVoiceOut *sw = &sc->sw;
460 CaptureVoiceOut *cap = sc->cap;
461 int was_active = sw->active;
462
463 if (sw->rate) {
464 st_rate_stop (sw->rate);
465 sw->rate = NULL;
466 }
467
468 QLIST_REMOVE (sw, entries);
469 QLIST_REMOVE (sc, entries);
470 g_free (sc);
471 if (was_active) {
472 /* We have removed soft voice from the capture:
473 this might have changed the overall status of the capture
474 since this might have been the only active voice */
475 audio_recalc_and_notify_capture (cap);
476 }
477 sc = sc1;
478 }
479 }
480
481 static int audio_attach_capture (HWVoiceOut *hw)
482 {
483 AudioState *s = hw->s;
484 CaptureVoiceOut *cap;
485
486 audio_detach_capture (hw);
487 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
488 SWVoiceCap *sc;
489 SWVoiceOut *sw;
490 HWVoiceOut *hw_cap = &cap->hw;
491
492 sc = g_malloc0(sizeof(*sc));
493
494 sc->cap = cap;
495 sw = &sc->sw;
496 sw->hw = hw_cap;
497 sw->info = hw->info;
498 sw->empty = 1;
499 sw->active = hw->enabled;
500 sw->conv = noop_conv;
501 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
502 sw->vol = nominal_volume;
503 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
504 if (!sw->rate) {
505 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
506 g_free (sw);
507 return -1;
508 }
509 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
510 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
511 #ifdef DEBUG_CAPTURE
512 sw->name = g_strdup_printf ("for %p %d,%d,%d",
513 hw, sw->info.freq, sw->info.bits,
514 sw->info.nchannels);
515 dolog ("Added %s active = %d\n", sw->name, sw->active);
516 #endif
517 if (sw->active) {
518 audio_capture_maybe_changed (cap, 1);
519 }
520 }
521 return 0;
522 }
523
524 /*
525 * Hard voice (capture)
526 */
527 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw)
528 {
529 SWVoiceIn *sw;
530 size_t m = hw->total_samples_captured;
531
532 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
533 if (sw->active) {
534 m = MIN (m, sw->total_hw_samples_acquired);
535 }
536 }
537 return m;
538 }
539
540 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw)
541 {
542 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
543 if (audio_bug(__func__, live > hw->conv_buf->size)) {
544 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size);
545 return 0;
546 }
547 return live;
548 }
549
550 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len)
551 {
552 size_t clipped = 0;
553 size_t pos = hw->mix_buf->pos;
554
555 while (len) {
556 st_sample *src = hw->mix_buf->samples + pos;
557 uint8_t *dst = advance(pcm_buf, clipped * hw->info.bytes_per_frame);
558 size_t samples_till_end_of_buf = hw->mix_buf->size - pos;
559 size_t samples_to_clip = MIN(len, samples_till_end_of_buf);
560
561 hw->clip(dst, src, samples_to_clip);
562
563 pos = (pos + samples_to_clip) % hw->mix_buf->size;
564 len -= samples_to_clip;
565 clipped += samples_to_clip;
566 }
567 }
568
569 /*
570 * Soft voice (capture)
571 */
572 static size_t audio_pcm_sw_get_rpos_in(SWVoiceIn *sw)
573 {
574 HWVoiceIn *hw = sw->hw;
575 ssize_t live = hw->total_samples_captured - sw->total_hw_samples_acquired;
576 ssize_t rpos;
577
578 if (audio_bug(__func__, live < 0 || live > hw->conv_buf->size)) {
579 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size);
580 return 0;
581 }
582
583 rpos = hw->conv_buf->pos - live;
584 if (rpos >= 0) {
585 return rpos;
586 } else {
587 return hw->conv_buf->size + rpos;
588 }
589 }
590
591 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t size)
592 {
593 HWVoiceIn *hw = sw->hw;
594 size_t samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
595 struct st_sample *src, *dst = sw->buf;
596
597 rpos = audio_pcm_sw_get_rpos_in(sw) % hw->conv_buf->size;
598
599 live = hw->total_samples_captured - sw->total_hw_samples_acquired;
600 if (audio_bug(__func__, live > hw->conv_buf->size)) {
601 dolog("live_in=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size);
602 return 0;
603 }
604
605 samples = size / sw->info.bytes_per_frame;
606 if (!live) {
607 return 0;
608 }
609
610 swlim = (live * sw->ratio) >> 32;
611 swlim = MIN (swlim, samples);
612
613 while (swlim) {
614 src = hw->conv_buf->samples + rpos;
615 if (hw->conv_buf->pos > rpos) {
616 isamp = hw->conv_buf->pos - rpos;
617 } else {
618 isamp = hw->conv_buf->size - rpos;
619 }
620
621 if (!isamp) {
622 break;
623 }
624 osamp = swlim;
625
626 st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
627 swlim -= osamp;
628 rpos = (rpos + isamp) % hw->conv_buf->size;
629 dst += osamp;
630 ret += osamp;
631 total += isamp;
632 }
633
634 if (hw->pcm_ops && !hw->pcm_ops->volume_in) {
635 mixeng_volume (sw->buf, ret, &sw->vol);
636 }
637
638 sw->clip (buf, sw->buf, ret);
639 sw->total_hw_samples_acquired += total;
640 return ret * sw->info.bytes_per_frame;
641 }
642
643 /*
644 * Hard voice (playback)
645 */
646 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
647 {
648 SWVoiceOut *sw;
649 size_t m = SIZE_MAX;
650 int nb_live = 0;
651
652 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
653 if (sw->active || !sw->empty) {
654 m = MIN (m, sw->total_hw_samples_mixed);
655 nb_live += 1;
656 }
657 }
658
659 *nb_livep = nb_live;
660 return m;
661 }
662
663 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
664 {
665 size_t smin;
666 int nb_live1;
667
668 smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
669 if (nb_live) {
670 *nb_live = nb_live1;
671 }
672
673 if (nb_live1) {
674 size_t live = smin;
675
676 if (audio_bug(__func__, live > hw->mix_buf->size)) {
677 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size);
678 return 0;
679 }
680 return live;
681 }
682 return 0;
683 }
684
685 /*
686 * Soft voice (playback)
687 */
688 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size)
689 {
690 size_t hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
691 size_t ret = 0, pos = 0, total = 0;
692
693 if (!sw) {
694 return size;
695 }
696
697 hwsamples = sw->hw->mix_buf->size;
698
699 live = sw->total_hw_samples_mixed;
700 if (audio_bug(__func__, live > hwsamples)) {
701 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hwsamples);
702 return 0;
703 }
704
705 if (live == hwsamples) {
706 #ifdef DEBUG_OUT
707 dolog ("%s is full %d\n", sw->name, live);
708 #endif
709 return 0;
710 }
711
712 wpos = (sw->hw->mix_buf->pos + live) % hwsamples;
713 samples = size / sw->info.bytes_per_frame;
714
715 dead = hwsamples - live;
716 swlim = ((int64_t) dead << 32) / sw->ratio;
717 swlim = MIN (swlim, samples);
718 if (swlim) {
719 sw->conv (sw->buf, buf, swlim);
720
721 if (sw->hw->pcm_ops && !sw->hw->pcm_ops->volume_out) {
722 mixeng_volume (sw->buf, swlim, &sw->vol);
723 }
724 }
725
726 while (swlim) {
727 dead = hwsamples - live;
728 left = hwsamples - wpos;
729 blck = MIN (dead, left);
730 if (!blck) {
731 break;
732 }
733 isamp = swlim;
734 osamp = blck;
735 st_rate_flow_mix (
736 sw->rate,
737 sw->buf + pos,
738 sw->hw->mix_buf->samples + wpos,
739 &isamp,
740 &osamp
741 );
742 ret += isamp;
743 swlim -= isamp;
744 pos += isamp;
745 live += osamp;
746 wpos = (wpos + osamp) % hwsamples;
747 total += osamp;
748 }
749
750 sw->total_hw_samples_mixed += total;
751 sw->empty = sw->total_hw_samples_mixed == 0;
752
753 #ifdef DEBUG_OUT
754 dolog (
755 "%s: write size %zu ret %zu total sw %zu\n",
756 SW_NAME (sw),
757 size / sw->info.bytes_per_frame,
758 ret,
759 sw->total_hw_samples_mixed
760 );
761 #endif
762
763 return ret * sw->info.bytes_per_frame;
764 }
765
766 #ifdef DEBUG_AUDIO
767 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
768 {
769 dolog("%s: bits %d, sign %d, float %d, freq %d, nchan %d\n",
770 cap, info->bits, info->is_signed, info->is_float, info->freq,
771 info->nchannels);
772 }
773 #endif
774
775 #define DAC
776 #include "audio_template.h"
777 #undef DAC
778 #include "audio_template.h"
779
780 /*
781 * Timer
782 */
783 static int audio_is_timer_needed(AudioState *s)
784 {
785 HWVoiceIn *hwi = NULL;
786 HWVoiceOut *hwo = NULL;
787
788 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) {
789 if (!hwo->poll_mode) {
790 return 1;
791 }
792 }
793 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) {
794 if (!hwi->poll_mode) {
795 return 1;
796 }
797 }
798 return 0;
799 }
800
801 static void audio_reset_timer (AudioState *s)
802 {
803 if (audio_is_timer_needed(s)) {
804 timer_mod_anticipate_ns(s->ts,
805 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks);
806 if (!s->timer_running) {
807 s->timer_running = true;
808 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
809 trace_audio_timer_start(s->period_ticks / SCALE_MS);
810 }
811 } else {
812 timer_del(s->ts);
813 if (s->timer_running) {
814 s->timer_running = false;
815 trace_audio_timer_stop();
816 }
817 }
818 }
819
820 static void audio_timer (void *opaque)
821 {
822 int64_t now, diff;
823 AudioState *s = opaque;
824
825 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
826 diff = now - s->timer_last;
827 if (diff > s->period_ticks * 3 / 2) {
828 trace_audio_timer_delayed(diff / SCALE_MS);
829 }
830 s->timer_last = now;
831
832 audio_run(s, "timer");
833 audio_reset_timer(s);
834 }
835
836 /*
837 * Public API
838 */
839 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size)
840 {
841 HWVoiceOut *hw;
842
843 if (!sw) {
844 /* XXX: Consider options */
845 return size;
846 }
847 hw = sw->hw;
848
849 if (!hw->enabled) {
850 dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
851 return 0;
852 }
853
854 if (audio_get_pdo_out(hw->s->dev)->mixing_engine) {
855 return audio_pcm_sw_write(sw, buf, size);
856 } else {
857 return hw->pcm_ops->write(hw, buf, size);
858 }
859 }
860
861 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size)
862 {
863 HWVoiceIn *hw;
864
865 if (!sw) {
866 /* XXX: Consider options */
867 return size;
868 }
869 hw = sw->hw;
870
871 if (!hw->enabled) {
872 dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
873 return 0;
874 }
875
876 if (audio_get_pdo_in(hw->s->dev)->mixing_engine) {
877 return audio_pcm_sw_read(sw, buf, size);
878 } else {
879 return hw->pcm_ops->read(hw, buf, size);
880 }
881 }
882
883 int AUD_get_buffer_size_out(SWVoiceOut *sw)
884 {
885 return sw->hw->samples * sw->hw->info.bytes_per_frame;
886 }
887
888 void AUD_set_active_out (SWVoiceOut *sw, int on)
889 {
890 HWVoiceOut *hw;
891
892 if (!sw) {
893 return;
894 }
895
896 hw = sw->hw;
897 if (sw->active != on) {
898 AudioState *s = sw->s;
899 SWVoiceOut *temp_sw;
900 SWVoiceCap *sc;
901
902 if (on) {
903 hw->pending_disable = 0;
904 if (!hw->enabled) {
905 hw->enabled = 1;
906 if (s->vm_running) {
907 if (hw->pcm_ops->enable_out) {
908 hw->pcm_ops->enable_out(hw, true);
909 }
910 audio_reset_timer (s);
911 }
912 }
913 } else {
914 if (hw->enabled) {
915 int nb_active = 0;
916
917 for (temp_sw = hw->sw_head.lh_first; temp_sw;
918 temp_sw = temp_sw->entries.le_next) {
919 nb_active += temp_sw->active != 0;
920 }
921
922 hw->pending_disable = nb_active == 1;
923 }
924 }
925
926 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
927 sc->sw.active = hw->enabled;
928 if (hw->enabled) {
929 audio_capture_maybe_changed (sc->cap, 1);
930 }
931 }
932 sw->active = on;
933 }
934 }
935
936 void AUD_set_active_in (SWVoiceIn *sw, int on)
937 {
938 HWVoiceIn *hw;
939
940 if (!sw) {
941 return;
942 }
943
944 hw = sw->hw;
945 if (sw->active != on) {
946 AudioState *s = sw->s;
947 SWVoiceIn *temp_sw;
948
949 if (on) {
950 if (!hw->enabled) {
951 hw->enabled = 1;
952 if (s->vm_running) {
953 if (hw->pcm_ops->enable_in) {
954 hw->pcm_ops->enable_in(hw, true);
955 }
956 audio_reset_timer (s);
957 }
958 }
959 sw->total_hw_samples_acquired = hw->total_samples_captured;
960 } else {
961 if (hw->enabled) {
962 int nb_active = 0;
963
964 for (temp_sw = hw->sw_head.lh_first; temp_sw;
965 temp_sw = temp_sw->entries.le_next) {
966 nb_active += temp_sw->active != 0;
967 }
968
969 if (nb_active == 1) {
970 hw->enabled = 0;
971 if (hw->pcm_ops->enable_in) {
972 hw->pcm_ops->enable_in(hw, false);
973 }
974 }
975 }
976 }
977 sw->active = on;
978 }
979 }
980
981 static size_t audio_get_avail (SWVoiceIn *sw)
982 {
983 size_t live;
984
985 if (!sw) {
986 return 0;
987 }
988
989 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
990 if (audio_bug(__func__, live > sw->hw->conv_buf->size)) {
991 dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live,
992 sw->hw->conv_buf->size);
993 return 0;
994 }
995
996 ldebug (
997 "%s: get_avail live %d ret %" PRId64 "\n",
998 SW_NAME (sw),
999 live, (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame
1000 );
1001
1002 return (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame;
1003 }
1004
1005 static size_t audio_get_free(SWVoiceOut *sw)
1006 {
1007 size_t live, dead;
1008
1009 if (!sw) {
1010 return 0;
1011 }
1012
1013 live = sw->total_hw_samples_mixed;
1014
1015 if (audio_bug(__func__, live > sw->hw->mix_buf->size)) {
1016 dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live,
1017 sw->hw->mix_buf->size);
1018 return 0;
1019 }
1020
1021 dead = sw->hw->mix_buf->size - live;
1022
1023 #ifdef DEBUG_OUT
1024 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1025 SW_NAME (sw),
1026 live, dead, (((int64_t) dead << 32) / sw->ratio) *
1027 sw->info.bytes_per_frame);
1028 #endif
1029
1030 return (((int64_t) dead << 32) / sw->ratio) * sw->info.bytes_per_frame;
1031 }
1032
1033 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos,
1034 size_t samples)
1035 {
1036 size_t n;
1037
1038 if (hw->enabled) {
1039 SWVoiceCap *sc;
1040
1041 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1042 SWVoiceOut *sw = &sc->sw;
1043 int rpos2 = rpos;
1044
1045 n = samples;
1046 while (n) {
1047 size_t till_end_of_hw = hw->mix_buf->size - rpos2;
1048 size_t to_write = MIN(till_end_of_hw, n);
1049 size_t bytes = to_write * hw->info.bytes_per_frame;
1050 size_t written;
1051
1052 sw->buf = hw->mix_buf->samples + rpos2;
1053 written = audio_pcm_sw_write (sw, NULL, bytes);
1054 if (written - bytes) {
1055 dolog("Could not mix %zu bytes into a capture "
1056 "buffer, mixed %zu\n",
1057 bytes, written);
1058 break;
1059 }
1060 n -= to_write;
1061 rpos2 = (rpos2 + to_write) % hw->mix_buf->size;
1062 }
1063 }
1064 }
1065
1066 n = MIN(samples, hw->mix_buf->size - rpos);
1067 mixeng_clear(hw->mix_buf->samples + rpos, n);
1068 mixeng_clear(hw->mix_buf->samples, samples - n);
1069 }
1070
1071 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live)
1072 {
1073 size_t clipped = 0;
1074
1075 while (live) {
1076 size_t size = live * hw->info.bytes_per_frame;
1077 size_t decr, proc;
1078 void *buf = hw->pcm_ops->get_buffer_out(hw, &size);
1079
1080 if (size == 0) {
1081 break;
1082 }
1083
1084 decr = MIN(size / hw->info.bytes_per_frame, live);
1085 if (buf) {
1086 audio_pcm_hw_clip_out(hw, buf, decr);
1087 }
1088 proc = hw->pcm_ops->put_buffer_out(hw, buf,
1089 decr * hw->info.bytes_per_frame) /
1090 hw->info.bytes_per_frame;
1091
1092 live -= proc;
1093 clipped += proc;
1094 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size;
1095
1096 if (proc == 0 || proc < decr) {
1097 break;
1098 }
1099 }
1100
1101 if (hw->pcm_ops->run_buffer_out) {
1102 hw->pcm_ops->run_buffer_out(hw);
1103 }
1104
1105 return clipped;
1106 }
1107
1108 static void audio_run_out (AudioState *s)
1109 {
1110 HWVoiceOut *hw = NULL;
1111 SWVoiceOut *sw;
1112
1113 if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1114 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1115 /* there is exactly 1 sw for each hw with no mixeng */
1116 sw = hw->sw_head.lh_first;
1117
1118 if (hw->pending_disable) {
1119 hw->enabled = 0;
1120 hw->pending_disable = 0;
1121 if (hw->pcm_ops->enable_out) {
1122 hw->pcm_ops->enable_out(hw, false);
1123 }
1124 }
1125
1126 if (sw->active) {
1127 sw->callback.fn(sw->callback.opaque, INT_MAX);
1128 }
1129 }
1130 return;
1131 }
1132
1133 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1134 size_t played, live, prev_rpos, free;
1135 int nb_live;
1136
1137 live = audio_pcm_hw_get_live_out (hw, &nb_live);
1138 if (!nb_live) {
1139 live = 0;
1140 }
1141
1142 if (audio_bug(__func__, live > hw->mix_buf->size)) {
1143 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size);
1144 continue;
1145 }
1146
1147 if (hw->pending_disable && !nb_live) {
1148 SWVoiceCap *sc;
1149 #ifdef DEBUG_OUT
1150 dolog ("Disabling voice\n");
1151 #endif
1152 hw->enabled = 0;
1153 hw->pending_disable = 0;
1154 if (hw->pcm_ops->enable_out) {
1155 hw->pcm_ops->enable_out(hw, false);
1156 }
1157 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1158 sc->sw.active = 0;
1159 audio_recalc_and_notify_capture (sc->cap);
1160 }
1161 continue;
1162 }
1163
1164 if (!live) {
1165 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1166 if (sw->active) {
1167 free = audio_get_free (sw);
1168 if (free > 0) {
1169 sw->callback.fn (sw->callback.opaque, free);
1170 }
1171 }
1172 }
1173 if (hw->pcm_ops->run_buffer_out) {
1174 hw->pcm_ops->run_buffer_out(hw);
1175 }
1176 continue;
1177 }
1178
1179 prev_rpos = hw->mix_buf->pos;
1180 played = audio_pcm_hw_run_out(hw, live);
1181 replay_audio_out(&played);
1182 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) {
1183 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n",
1184 hw->mix_buf->pos, hw->mix_buf->size, played);
1185 hw->mix_buf->pos = 0;
1186 }
1187
1188 #ifdef DEBUG_OUT
1189 dolog("played=%zu\n", played);
1190 #endif
1191
1192 if (played) {
1193 hw->ts_helper += played;
1194 audio_capture_mix_and_clear (hw, prev_rpos, played);
1195 }
1196
1197 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1198 if (!sw->active && sw->empty) {
1199 continue;
1200 }
1201
1202 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1203 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n",
1204 played, sw->total_hw_samples_mixed);
1205 played = sw->total_hw_samples_mixed;
1206 }
1207
1208 sw->total_hw_samples_mixed -= played;
1209
1210 if (!sw->total_hw_samples_mixed) {
1211 sw->empty = 1;
1212 }
1213
1214 if (sw->active) {
1215 free = audio_get_free (sw);
1216 if (free > 0) {
1217 sw->callback.fn (sw->callback.opaque, free);
1218 }
1219 }
1220 }
1221 }
1222 }
1223
1224 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples)
1225 {
1226 size_t conv = 0;
1227 STSampleBuffer *conv_buf = hw->conv_buf;
1228
1229 if (hw->pcm_ops->run_buffer_in) {
1230 hw->pcm_ops->run_buffer_in(hw);
1231 }
1232
1233 while (samples) {
1234 size_t proc;
1235 size_t size = samples * hw->info.bytes_per_frame;
1236 void *buf = hw->pcm_ops->get_buffer_in(hw, &size);
1237
1238 assert(size % hw->info.bytes_per_frame == 0);
1239 if (size == 0) {
1240 break;
1241 }
1242
1243 proc = MIN(size / hw->info.bytes_per_frame,
1244 conv_buf->size - conv_buf->pos);
1245
1246 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc);
1247 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size;
1248
1249 samples -= proc;
1250 conv += proc;
1251 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame);
1252 }
1253
1254 return conv;
1255 }
1256
1257 static void audio_run_in (AudioState *s)
1258 {
1259 HWVoiceIn *hw = NULL;
1260
1261 if (!audio_get_pdo_in(s->dev)->mixing_engine) {
1262 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1263 /* there is exactly 1 sw for each hw with no mixeng */
1264 SWVoiceIn *sw = hw->sw_head.lh_first;
1265 if (sw->active) {
1266 sw->callback.fn(sw->callback.opaque, INT_MAX);
1267 }
1268 }
1269 return;
1270 }
1271
1272 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1273 SWVoiceIn *sw;
1274 size_t captured = 0, min;
1275
1276 if (replay_mode != REPLAY_MODE_PLAY) {
1277 captured = audio_pcm_hw_run_in(
1278 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw));
1279 }
1280 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos,
1281 hw->conv_buf->size);
1282
1283 min = audio_pcm_hw_find_min_in (hw);
1284 hw->total_samples_captured += captured - min;
1285 hw->ts_helper += captured;
1286
1287 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1288 sw->total_hw_samples_acquired -= min;
1289
1290 if (sw->active) {
1291 size_t avail;
1292
1293 avail = audio_get_avail (sw);
1294 if (avail > 0) {
1295 sw->callback.fn (sw->callback.opaque, avail);
1296 }
1297 }
1298 }
1299 }
1300 }
1301
1302 static void audio_run_capture (AudioState *s)
1303 {
1304 CaptureVoiceOut *cap;
1305
1306 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1307 size_t live, rpos, captured;
1308 HWVoiceOut *hw = &cap->hw;
1309 SWVoiceOut *sw;
1310
1311 captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1312 rpos = hw->mix_buf->pos;
1313 while (live) {
1314 size_t left = hw->mix_buf->size - rpos;
1315 size_t to_capture = MIN(live, left);
1316 struct st_sample *src;
1317 struct capture_callback *cb;
1318
1319 src = hw->mix_buf->samples + rpos;
1320 hw->clip (cap->buf, src, to_capture);
1321 mixeng_clear (src, to_capture);
1322
1323 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1324 cb->ops.capture (cb->opaque, cap->buf,
1325 to_capture * hw->info.bytes_per_frame);
1326 }
1327 rpos = (rpos + to_capture) % hw->mix_buf->size;
1328 live -= to_capture;
1329 }
1330 hw->mix_buf->pos = rpos;
1331
1332 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1333 if (!sw->active && sw->empty) {
1334 continue;
1335 }
1336
1337 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1338 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n",
1339 captured, sw->total_hw_samples_mixed);
1340 captured = sw->total_hw_samples_mixed;
1341 }
1342
1343 sw->total_hw_samples_mixed -= captured;
1344 sw->empty = sw->total_hw_samples_mixed == 0;
1345 }
1346 }
1347 }
1348
1349 void audio_run(AudioState *s, const char *msg)
1350 {
1351 audio_run_out(s);
1352 audio_run_in(s);
1353 audio_run_capture(s);
1354
1355 #ifdef DEBUG_POLL
1356 {
1357 static double prevtime;
1358 double currtime;
1359 struct timeval tv;
1360
1361 if (gettimeofday (&tv, NULL)) {
1362 perror ("audio_run: gettimeofday");
1363 return;
1364 }
1365
1366 currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1367 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1368 prevtime = currtime;
1369 }
1370 #endif
1371 }
1372
1373 void audio_generic_run_buffer_in(HWVoiceIn *hw)
1374 {
1375 if (unlikely(!hw->buf_emul)) {
1376 hw->size_emul = hw->samples * hw->info.bytes_per_frame;
1377 hw->buf_emul = g_malloc(hw->size_emul);
1378 hw->pos_emul = hw->pending_emul = 0;
1379 }
1380
1381 while (hw->pending_emul < hw->size_emul) {
1382 size_t read_len = MIN(hw->size_emul - hw->pos_emul,
1383 hw->size_emul - hw->pending_emul);
1384 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul,
1385 read_len);
1386 hw->pending_emul += read;
1387 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul;
1388 if (read < read_len) {
1389 break;
1390 }
1391 }
1392 }
1393
1394 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size)
1395 {
1396 ssize_t start = (ssize_t)hw->pos_emul - hw->pending_emul;
1397
1398 if (start < 0) {
1399 start += hw->size_emul;
1400 }
1401 assert(start >= 0 && start < hw->size_emul);
1402
1403 *size = MIN(*size, hw->pending_emul);
1404 *size = MIN(*size, hw->size_emul - start);
1405 return hw->buf_emul + start;
1406 }
1407
1408 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
1409 {
1410 assert(size <= hw->pending_emul);
1411 hw->pending_emul -= size;
1412 }
1413
1414 void audio_generic_run_buffer_out(HWVoiceOut *hw)
1415 {
1416 while (hw->pending_emul) {
1417 size_t write_len, written;
1418 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul;
1419
1420 if (start < 0) {
1421 start += hw->size_emul;
1422 }
1423 assert(start >= 0 && start < hw->size_emul);
1424
1425 write_len = MIN(hw->pending_emul, hw->size_emul - start);
1426
1427 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len);
1428 hw->pending_emul -= written;
1429
1430 if (written < write_len) {
1431 break;
1432 }
1433 }
1434 }
1435
1436 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size)
1437 {
1438 if (unlikely(!hw->buf_emul)) {
1439 hw->size_emul = hw->samples * hw->info.bytes_per_frame;
1440 hw->buf_emul = g_malloc(hw->size_emul);
1441 hw->pos_emul = hw->pending_emul = 0;
1442 }
1443
1444 *size = MIN(hw->size_emul - hw->pending_emul,
1445 hw->size_emul - hw->pos_emul);
1446 return hw->buf_emul + hw->pos_emul;
1447 }
1448
1449 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
1450 {
1451 assert(buf == hw->buf_emul + hw->pos_emul &&
1452 size + hw->pending_emul <= hw->size_emul);
1453
1454 hw->pending_emul += size;
1455 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
1456
1457 return size;
1458 }
1459
1460 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size)
1461 {
1462 size_t total = 0;
1463
1464 while (total < size) {
1465 size_t dst_size = size - total;
1466 size_t copy_size, proc;
1467 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size);
1468
1469 if (dst_size == 0) {
1470 break;
1471 }
1472
1473 copy_size = MIN(size - total, dst_size);
1474 if (dst) {
1475 memcpy(dst, (char *)buf + total, copy_size);
1476 }
1477 proc = hw->pcm_ops->put_buffer_out(hw, dst, copy_size);
1478 total += proc;
1479
1480 if (proc == 0 || proc < copy_size) {
1481 break;
1482 }
1483 }
1484
1485 if (hw->pcm_ops->run_buffer_out) {
1486 hw->pcm_ops->run_buffer_out(hw);
1487 }
1488
1489 return total;
1490 }
1491
1492 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size)
1493 {
1494 size_t total = 0;
1495
1496 if (hw->pcm_ops->run_buffer_in) {
1497 hw->pcm_ops->run_buffer_in(hw);
1498 }
1499
1500 while (total < size) {
1501 size_t src_size = size - total;
1502 void *src = hw->pcm_ops->get_buffer_in(hw, &src_size);
1503
1504 if (src_size == 0) {
1505 break;
1506 }
1507
1508 memcpy((char *)buf + total, src, src_size);
1509 hw->pcm_ops->put_buffer_in(hw, src, src_size);
1510 total += src_size;
1511 }
1512
1513 return total;
1514 }
1515
1516 static int audio_driver_init(AudioState *s, struct audio_driver *drv,
1517 bool msg, Audiodev *dev)
1518 {
1519 s->drv_opaque = drv->init(dev);
1520
1521 if (s->drv_opaque) {
1522 if (!drv->pcm_ops->get_buffer_in) {
1523 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in;
1524 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in;
1525 }
1526 if (!drv->pcm_ops->get_buffer_out) {
1527 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out;
1528 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out;
1529 }
1530
1531 audio_init_nb_voices_out(s, drv);
1532 audio_init_nb_voices_in(s, drv);
1533 s->drv = drv;
1534 return 0;
1535 } else {
1536 if (msg) {
1537 dolog("Could not init `%s' audio driver\n", drv->name);
1538 }
1539 return -1;
1540 }
1541 }
1542
1543 static void audio_vm_change_state_handler (void *opaque, int running,
1544 RunState state)
1545 {
1546 AudioState *s = opaque;
1547 HWVoiceOut *hwo = NULL;
1548 HWVoiceIn *hwi = NULL;
1549
1550 s->vm_running = running;
1551 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) {
1552 if (hwo->pcm_ops->enable_out) {
1553 hwo->pcm_ops->enable_out(hwo, running);
1554 }
1555 }
1556
1557 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) {
1558 if (hwi->pcm_ops->enable_in) {
1559 hwi->pcm_ops->enable_in(hwi, running);
1560 }
1561 }
1562 audio_reset_timer (s);
1563 }
1564
1565 static void free_audio_state(AudioState *s)
1566 {
1567 HWVoiceOut *hwo, *hwon;
1568 HWVoiceIn *hwi, *hwin;
1569
1570 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) {
1571 SWVoiceCap *sc;
1572
1573 if (hwo->enabled && hwo->pcm_ops->enable_out) {
1574 hwo->pcm_ops->enable_out(hwo, false);
1575 }
1576 hwo->pcm_ops->fini_out (hwo);
1577
1578 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1579 CaptureVoiceOut *cap = sc->cap;
1580 struct capture_callback *cb;
1581
1582 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1583 cb->ops.destroy (cb->opaque);
1584 }
1585 }
1586 QLIST_REMOVE(hwo, entries);
1587 }
1588
1589 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) {
1590 if (hwi->enabled && hwi->pcm_ops->enable_in) {
1591 hwi->pcm_ops->enable_in(hwi, false);
1592 }
1593 hwi->pcm_ops->fini_in (hwi);
1594 QLIST_REMOVE(hwi, entries);
1595 }
1596
1597 if (s->drv) {
1598 s->drv->fini (s->drv_opaque);
1599 s->drv = NULL;
1600 }
1601
1602 if (s->dev) {
1603 qapi_free_Audiodev(s->dev);
1604 s->dev = NULL;
1605 }
1606
1607 if (s->ts) {
1608 timer_free(s->ts);
1609 s->ts = NULL;
1610 }
1611
1612 g_free(s);
1613 }
1614
1615 void audio_cleanup(void)
1616 {
1617 while (!QTAILQ_EMPTY(&audio_states)) {
1618 AudioState *s = QTAILQ_FIRST(&audio_states);
1619 QTAILQ_REMOVE(&audio_states, s, list);
1620 free_audio_state(s);
1621 }
1622 }
1623
1624 static const VMStateDescription vmstate_audio = {
1625 .name = "audio",
1626 .version_id = 1,
1627 .minimum_version_id = 1,
1628 .fields = (VMStateField[]) {
1629 VMSTATE_END_OF_LIST()
1630 }
1631 };
1632
1633 static void audio_validate_opts(Audiodev *dev, Error **errp);
1634
1635 static AudiodevListEntry *audiodev_find(
1636 AudiodevListHead *head, const char *drvname)
1637 {
1638 AudiodevListEntry *e;
1639 QSIMPLEQ_FOREACH(e, head, next) {
1640 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) {
1641 return e;
1642 }
1643 }
1644
1645 return NULL;
1646 }
1647
1648 /*
1649 * if we have dev, this function was called because of an -audiodev argument =>
1650 * initialize a new state with it
1651 * if dev == NULL => legacy implicit initialization, return the already created
1652 * state or create a new one
1653 */
1654 static AudioState *audio_init(Audiodev *dev, const char *name)
1655 {
1656 static bool atexit_registered;
1657 size_t i;
1658 int done = 0;
1659 const char *drvname = NULL;
1660 VMChangeStateEntry *e;
1661 AudioState *s;
1662 struct audio_driver *driver;
1663 /* silence gcc warning about uninitialized variable */
1664 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
1665
1666 if (using_spice) {
1667 /*
1668 * When using spice allow the spice audio driver being picked
1669 * as default.
1670 *
1671 * Temporary hack. Using audio devices without explicit
1672 * audiodev= property is already deprecated. Same goes for
1673 * the -soundhw switch. Once this support gets finally
1674 * removed we can also drop the concept of a default audio
1675 * backend and this can go away.
1676 */
1677 driver = audio_driver_lookup("spice");
1678 if (driver) {
1679 driver->can_be_default = 1;
1680 }
1681 }
1682
1683 if (dev) {
1684 /* -audiodev option */
1685 legacy_config = false;
1686 drvname = AudiodevDriver_str(dev->driver);
1687 } else if (!QTAILQ_EMPTY(&audio_states)) {
1688 if (!legacy_config) {
1689 dolog("Device %s: audiodev default parameter is deprecated, please "
1690 "specify audiodev=%s\n", name,
1691 QTAILQ_FIRST(&audio_states)->dev->id);
1692 }
1693 return QTAILQ_FIRST(&audio_states);
1694 } else {
1695 /* legacy implicit initialization */
1696 head = audio_handle_legacy_opts();
1697 /*
1698 * In case of legacy initialization, all Audiodevs in the list will have
1699 * the same configuration (except the driver), so it doesn't matter which
1700 * one we chose. We need an Audiodev to set up AudioState before we can
1701 * init a driver. Also note that dev at this point is still in the
1702 * list.
1703 */
1704 dev = QSIMPLEQ_FIRST(&head)->dev;
1705 audio_validate_opts(dev, &error_abort);
1706 }
1707
1708 s = g_malloc0(sizeof(AudioState));
1709 s->dev = dev;
1710
1711 QLIST_INIT (&s->hw_head_out);
1712 QLIST_INIT (&s->hw_head_in);
1713 QLIST_INIT (&s->cap_head);
1714 if (!atexit_registered) {
1715 atexit(audio_cleanup);
1716 atexit_registered = true;
1717 }
1718 QTAILQ_INSERT_TAIL(&audio_states, s, list);
1719
1720 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1721
1722 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
1723 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
1724
1725 if (s->nb_hw_voices_out <= 0) {
1726 dolog ("Bogus number of playback voices %d, setting to 1\n",
1727 s->nb_hw_voices_out);
1728 s->nb_hw_voices_out = 1;
1729 }
1730
1731 if (s->nb_hw_voices_in <= 0) {
1732 dolog ("Bogus number of capture voices %d, setting to 0\n",
1733 s->nb_hw_voices_in);
1734 s->nb_hw_voices_in = 0;
1735 }
1736
1737 if (drvname) {
1738 driver = audio_driver_lookup(drvname);
1739 if (driver) {
1740 done = !audio_driver_init(s, driver, true, dev);
1741 } else {
1742 dolog ("Unknown audio driver `%s'\n", drvname);
1743 }
1744 } else {
1745 for (i = 0; audio_prio_list[i]; i++) {
1746 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]);
1747 driver = audio_driver_lookup(audio_prio_list[i]);
1748
1749 if (e && driver) {
1750 s->dev = dev = e->dev;
1751 audio_validate_opts(dev, &error_abort);
1752 done = !audio_driver_init(s, driver, false, dev);
1753 if (done) {
1754 e->dev = NULL;
1755 break;
1756 }
1757 }
1758 }
1759 }
1760 audio_free_audiodev_list(&head);
1761
1762 if (!done) {
1763 driver = audio_driver_lookup("none");
1764 done = !audio_driver_init(s, driver, false, dev);
1765 assert(done);
1766 dolog("warning: Using timer based audio emulation\n");
1767 }
1768
1769 if (dev->timer_period <= 0) {
1770 s->period_ticks = 1;
1771 } else {
1772 s->period_ticks = dev->timer_period * (int64_t)SCALE_US;
1773 }
1774
1775 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1776 if (!e) {
1777 dolog ("warning: Could not register change state handler\n"
1778 "(Audio can continue looping even after stopping the VM)\n");
1779 }
1780
1781 QLIST_INIT (&s->card_head);
1782 vmstate_register (NULL, 0, &vmstate_audio, s);
1783 return s;
1784 }
1785
1786 void audio_free_audiodev_list(AudiodevListHead *head)
1787 {
1788 AudiodevListEntry *e;
1789 while ((e = QSIMPLEQ_FIRST(head))) {
1790 QSIMPLEQ_REMOVE_HEAD(head, next);
1791 qapi_free_Audiodev(e->dev);
1792 g_free(e);
1793 }
1794 }
1795
1796 void AUD_register_card (const char *name, QEMUSoundCard *card)
1797 {
1798 if (!card->state) {
1799 card->state = audio_init(NULL, name);
1800 }
1801
1802 card->name = g_strdup (name);
1803 memset (&card->entries, 0, sizeof (card->entries));
1804 QLIST_INSERT_HEAD(&card->state->card_head, card, entries);
1805 }
1806
1807 void AUD_remove_card (QEMUSoundCard *card)
1808 {
1809 QLIST_REMOVE (card, entries);
1810 g_free (card->name);
1811 }
1812
1813
1814 CaptureVoiceOut *AUD_add_capture(
1815 AudioState *s,
1816 struct audsettings *as,
1817 struct audio_capture_ops *ops,
1818 void *cb_opaque
1819 )
1820 {
1821 CaptureVoiceOut *cap;
1822 struct capture_callback *cb;
1823
1824 if (!s) {
1825 if (!legacy_config) {
1826 dolog("Capturing without setting an audiodev is deprecated\n");
1827 }
1828 s = audio_init(NULL, NULL);
1829 }
1830
1831 if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1832 dolog("Can't capture with mixeng disabled\n");
1833 return NULL;
1834 }
1835
1836 if (audio_validate_settings (as)) {
1837 dolog ("Invalid settings were passed when trying to add capture\n");
1838 audio_print_settings (as);
1839 return NULL;
1840 }
1841
1842 cb = g_malloc0(sizeof(*cb));
1843 cb->ops = *ops;
1844 cb->opaque = cb_opaque;
1845
1846 cap = audio_pcm_capture_find_specific(s, as);
1847 if (cap) {
1848 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1849 return cap;
1850 } else {
1851 HWVoiceOut *hw;
1852 CaptureVoiceOut *cap;
1853
1854 cap = g_malloc0(sizeof(*cap));
1855
1856 hw = &cap->hw;
1857 hw->s = s;
1858 QLIST_INIT (&hw->sw_head);
1859 QLIST_INIT (&cap->cb_head);
1860
1861 /* XXX find a more elegant way */
1862 hw->samples = 4096 * 4;
1863 audio_pcm_hw_alloc_resources_out(hw);
1864
1865 audio_pcm_init_info (&hw->info, as);
1866
1867 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame);
1868
1869 if (hw->info.is_float) {
1870 hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
1871 } else {
1872 hw->clip = mixeng_clip
1873 [hw->info.nchannels == 2]
1874 [hw->info.is_signed]
1875 [hw->info.swap_endianness]
1876 [audio_bits_to_index(hw->info.bits)];
1877 }
1878
1879 QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1880 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1881
1882 QLIST_FOREACH(hw, &s->hw_head_out, entries) {
1883 audio_attach_capture (hw);
1884 }
1885 return cap;
1886 }
1887 }
1888
1889 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1890 {
1891 struct capture_callback *cb;
1892
1893 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1894 if (cb->opaque == cb_opaque) {
1895 cb->ops.destroy (cb_opaque);
1896 QLIST_REMOVE (cb, entries);
1897 g_free (cb);
1898
1899 if (!cap->cb_head.lh_first) {
1900 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1901
1902 while (sw) {
1903 SWVoiceCap *sc = (SWVoiceCap *) sw;
1904 #ifdef DEBUG_CAPTURE
1905 dolog ("freeing %s\n", sw->name);
1906 #endif
1907
1908 sw1 = sw->entries.le_next;
1909 if (sw->rate) {
1910 st_rate_stop (sw->rate);
1911 sw->rate = NULL;
1912 }
1913 QLIST_REMOVE (sw, entries);
1914 QLIST_REMOVE (sc, entries);
1915 g_free (sc);
1916 sw = sw1;
1917 }
1918 QLIST_REMOVE (cap, entries);
1919 g_free (cap->hw.mix_buf);
1920 g_free (cap->buf);
1921 g_free (cap);
1922 }
1923 return;
1924 }
1925 }
1926 }
1927
1928 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1929 {
1930 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1931 audio_set_volume_out(sw, &vol);
1932 }
1933
1934 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol)
1935 {
1936 if (sw) {
1937 HWVoiceOut *hw = sw->hw;
1938
1939 sw->vol.mute = vol->mute;
1940 sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
1941 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] /
1942 255;
1943
1944 if (hw->pcm_ops->volume_out) {
1945 hw->pcm_ops->volume_out(hw, vol);
1946 }
1947 }
1948 }
1949
1950 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1951 {
1952 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1953 audio_set_volume_in(sw, &vol);
1954 }
1955
1956 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol)
1957 {
1958 if (sw) {
1959 HWVoiceIn *hw = sw->hw;
1960
1961 sw->vol.mute = vol->mute;
1962 sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
1963 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] /
1964 255;
1965
1966 if (hw->pcm_ops->volume_in) {
1967 hw->pcm_ops->volume_in(hw, vol);
1968 }
1969 }
1970 }
1971
1972 void audio_create_pdos(Audiodev *dev)
1973 {
1974 switch (dev->driver) {
1975 #define CASE(DRIVER, driver, pdo_name) \
1976 case AUDIODEV_DRIVER_##DRIVER: \
1977 if (!dev->u.driver.has_in) { \
1978 dev->u.driver.in = g_malloc0( \
1979 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1980 dev->u.driver.has_in = true; \
1981 } \
1982 if (!dev->u.driver.has_out) { \
1983 dev->u.driver.out = g_malloc0( \
1984 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1985 dev->u.driver.has_out = true; \
1986 } \
1987 break
1988
1989 CASE(NONE, none, );
1990 CASE(ALSA, alsa, Alsa);
1991 CASE(COREAUDIO, coreaudio, Coreaudio);
1992 CASE(DSOUND, dsound, );
1993 CASE(JACK, jack, Jack);
1994 CASE(OSS, oss, Oss);
1995 CASE(PA, pa, Pa);
1996 CASE(SDL, sdl, Sdl);
1997 CASE(SPICE, spice, );
1998 CASE(WAV, wav, );
1999
2000 case AUDIODEV_DRIVER__MAX:
2001 abort();
2002 };
2003 }
2004
2005 static void audio_validate_per_direction_opts(
2006 AudiodevPerDirectionOptions *pdo, Error **errp)
2007 {
2008 if (!pdo->has_mixing_engine) {
2009 pdo->has_mixing_engine = true;
2010 pdo->mixing_engine = true;
2011 }
2012 if (!pdo->has_fixed_settings) {
2013 pdo->has_fixed_settings = true;
2014 pdo->fixed_settings = pdo->mixing_engine;
2015 }
2016 if (!pdo->fixed_settings &&
2017 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) {
2018 error_setg(errp,
2019 "You can't use frequency, channels or format with fixed-settings=off");
2020 return;
2021 }
2022 if (!pdo->mixing_engine && pdo->fixed_settings) {
2023 error_setg(errp, "You can't use fixed-settings without mixeng");
2024 return;
2025 }
2026
2027 if (!pdo->has_frequency) {
2028 pdo->has_frequency = true;
2029 pdo->frequency = 44100;
2030 }
2031 if (!pdo->has_channels) {
2032 pdo->has_channels = true;
2033 pdo->channels = 2;
2034 }
2035 if (!pdo->has_voices) {
2036 pdo->has_voices = true;
2037 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX;
2038 }
2039 if (!pdo->has_format) {
2040 pdo->has_format = true;
2041 pdo->format = AUDIO_FORMAT_S16;
2042 }
2043 }
2044
2045 static void audio_validate_opts(Audiodev *dev, Error **errp)
2046 {
2047 Error *err = NULL;
2048
2049 audio_create_pdos(dev);
2050
2051 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err);
2052 if (err) {
2053 error_propagate(errp, err);
2054 return;
2055 }
2056
2057 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err);
2058 if (err) {
2059 error_propagate(errp, err);
2060 return;
2061 }
2062
2063 if (!dev->has_timer_period) {
2064 dev->has_timer_period = true;
2065 dev->timer_period = 10000; /* 100Hz -> 10ms */
2066 }
2067 }
2068
2069 void audio_parse_option(const char *opt)
2070 {
2071 AudiodevListEntry *e;
2072 Audiodev *dev = NULL;
2073
2074 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal);
2075 visit_type_Audiodev(v, NULL, &dev, &error_fatal);
2076 visit_free(v);
2077
2078 audio_validate_opts(dev, &error_fatal);
2079
2080 e = g_malloc0(sizeof(AudiodevListEntry));
2081 e->dev = dev;
2082 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next);
2083 }
2084
2085 void audio_init_audiodevs(void)
2086 {
2087 AudiodevListEntry *e;
2088
2089 QSIMPLEQ_FOREACH(e, &audiodevs, next) {
2090 audio_init(e->dev, NULL);
2091 }
2092 }
2093
2094 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo)
2095 {
2096 return (audsettings) {
2097 .freq = pdo->frequency,
2098 .nchannels = pdo->channels,
2099 .fmt = pdo->format,
2100 .endianness = AUDIO_HOST_ENDIANNESS,
2101 };
2102 }
2103
2104 int audioformat_bytes_per_sample(AudioFormat fmt)
2105 {
2106 switch (fmt) {
2107 case AUDIO_FORMAT_U8:
2108 case AUDIO_FORMAT_S8:
2109 return 1;
2110
2111 case AUDIO_FORMAT_U16:
2112 case AUDIO_FORMAT_S16:
2113 return 2;
2114
2115 case AUDIO_FORMAT_U32:
2116 case AUDIO_FORMAT_S32:
2117 case AUDIO_FORMAT_F32:
2118 return 4;
2119
2120 case AUDIO_FORMAT__MAX:
2121 ;
2122 }
2123 abort();
2124 }
2125
2126
2127 /* frames = freq * usec / 1e6 */
2128 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo,
2129 audsettings *as, int def_usecs)
2130 {
2131 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs;
2132 return (as->freq * usecs + 500000) / 1000000;
2133 }
2134
2135 /* samples = channels * frames = channels * freq * usec / 1e6 */
2136 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo,
2137 audsettings *as, int def_usecs)
2138 {
2139 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs);
2140 }
2141
2142 /*
2143 * bytes = bytes_per_sample * samples =
2144 * bytes_per_sample * channels * freq * usec / 1e6
2145 */
2146 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo,
2147 audsettings *as, int def_usecs)
2148 {
2149 return audio_buffer_samples(pdo, as, def_usecs) *
2150 audioformat_bytes_per_sample(as->fmt);
2151 }
2152
2153 AudioState *audio_state_by_name(const char *name)
2154 {
2155 AudioState *s;
2156 QTAILQ_FOREACH(s, &audio_states, list) {
2157 assert(s->dev);
2158 if (strcmp(name, s->dev->id) == 0) {
2159 return s;
2160 }
2161 }
2162 return NULL;
2163 }
2164
2165 const char *audio_get_id(QEMUSoundCard *card)
2166 {
2167 if (card->state) {
2168 assert(card->state->dev);
2169 return card->state->dev->id;
2170 } else {
2171 return "";
2172 }
2173 }
2174
2175 void audio_rate_start(RateCtl *rate)
2176 {
2177 memset(rate, 0, sizeof(RateCtl));
2178 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2179 }
2180
2181 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate,
2182 size_t bytes_avail)
2183 {
2184 int64_t now;
2185 int64_t ticks;
2186 int64_t bytes;
2187 int64_t samples;
2188 size_t ret;
2189
2190 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2191 ticks = now - rate->start_ticks;
2192 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
2193 samples = (bytes - rate->bytes_sent) / info->bytes_per_frame;
2194 if (samples < 0 || samples > 65536) {
2195 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples);
2196 audio_rate_start(rate);
2197 samples = 0;
2198 }
2199
2200 ret = MIN(samples * info->bytes_per_frame, bytes_avail);
2201 rate->bytes_sent += ret;
2202 return ret;
2203 }