hw/ide/core: Trivial typo fix
[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 "trace.h"
38
39 #define AUDIO_CAP "audio"
40 #include "audio_int.h"
41
42 /* #define DEBUG_LIVE */
43 /* #define DEBUG_OUT */
44 /* #define DEBUG_CAPTURE */
45 /* #define DEBUG_POLL */
46
47 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
48
49
50 /* Order of CONFIG_AUDIO_DRIVERS is import.
51 The 1st one is the one used by default, that is the reason
52 that we generate the list.
53 */
54 const char *audio_prio_list[] = {
55 "spice",
56 CONFIG_AUDIO_DRIVERS
57 "none",
58 "wav",
59 NULL
60 };
61
62 static QLIST_HEAD(, audio_driver) audio_drivers;
63 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs);
64
65 void audio_driver_register(audio_driver *drv)
66 {
67 QLIST_INSERT_HEAD(&audio_drivers, drv, next);
68 }
69
70 audio_driver *audio_driver_lookup(const char *name)
71 {
72 struct audio_driver *d;
73
74 QLIST_FOREACH(d, &audio_drivers, next) {
75 if (strcmp(name, d->name) == 0) {
76 return d;
77 }
78 }
79
80 audio_module_load_one(name);
81 QLIST_FOREACH(d, &audio_drivers, next) {
82 if (strcmp(name, d->name) == 0) {
83 return d;
84 }
85 }
86
87 return NULL;
88 }
89
90 static QTAILQ_HEAD(AudioStateHead, AudioState) audio_states =
91 QTAILQ_HEAD_INITIALIZER(audio_states);
92
93 const struct mixeng_volume nominal_volume = {
94 .mute = 0,
95 #ifdef FLOAT_MIXENG
96 .r = 1.0,
97 .l = 1.0,
98 #else
99 .r = 1ULL << 32,
100 .l = 1ULL << 32,
101 #endif
102 };
103
104 static bool legacy_config = true;
105
106 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
107 #error No its not
108 #else
109 int audio_bug (const char *funcname, int cond)
110 {
111 if (cond) {
112 static int shown;
113
114 AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
115 if (!shown) {
116 shown = 1;
117 AUD_log (NULL, "Save all your work and restart without audio\n");
118 AUD_log (NULL, "I am sorry\n");
119 }
120 AUD_log (NULL, "Context:\n");
121
122 #if defined AUDIO_BREAKPOINT_ON_BUG
123 # if defined HOST_I386
124 # if defined __GNUC__
125 __asm__ ("int3");
126 # elif defined _MSC_VER
127 _asm _emit 0xcc;
128 # else
129 abort ();
130 # endif
131 # else
132 abort ();
133 # endif
134 #endif
135 }
136
137 return cond;
138 }
139 #endif
140
141 static inline int audio_bits_to_index (int bits)
142 {
143 switch (bits) {
144 case 8:
145 return 0;
146
147 case 16:
148 return 1;
149
150 case 32:
151 return 2;
152
153 default:
154 audio_bug ("bits_to_index", 1);
155 AUD_log (NULL, "invalid bits %d\n", bits);
156 return 0;
157 }
158 }
159
160 void *audio_calloc (const char *funcname, int nmemb, size_t size)
161 {
162 int cond;
163 size_t len;
164
165 len = nmemb * size;
166 cond = !nmemb || !size;
167 cond |= nmemb < 0;
168 cond |= len < size;
169
170 if (audio_bug ("audio_calloc", cond)) {
171 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
172 funcname);
173 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
174 return NULL;
175 }
176
177 return g_malloc0 (len);
178 }
179
180 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
181 {
182 if (cap) {
183 fprintf(stderr, "%s: ", cap);
184 }
185
186 vfprintf(stderr, fmt, ap);
187 }
188
189 void AUD_log (const char *cap, const char *fmt, ...)
190 {
191 va_list ap;
192
193 va_start (ap, fmt);
194 AUD_vlog (cap, fmt, ap);
195 va_end (ap);
196 }
197
198 static void audio_print_settings (struct audsettings *as)
199 {
200 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
201
202 switch (as->fmt) {
203 case AUDIO_FORMAT_S8:
204 AUD_log (NULL, "S8");
205 break;
206 case AUDIO_FORMAT_U8:
207 AUD_log (NULL, "U8");
208 break;
209 case AUDIO_FORMAT_S16:
210 AUD_log (NULL, "S16");
211 break;
212 case AUDIO_FORMAT_U16:
213 AUD_log (NULL, "U16");
214 break;
215 case AUDIO_FORMAT_S32:
216 AUD_log (NULL, "S32");
217 break;
218 case AUDIO_FORMAT_U32:
219 AUD_log (NULL, "U32");
220 break;
221 case AUDIO_FORMAT_F32:
222 AUD_log (NULL, "F32");
223 break;
224 default:
225 AUD_log (NULL, "invalid(%d)", as->fmt);
226 break;
227 }
228
229 AUD_log (NULL, " endianness=");
230 switch (as->endianness) {
231 case 0:
232 AUD_log (NULL, "little");
233 break;
234 case 1:
235 AUD_log (NULL, "big");
236 break;
237 default:
238 AUD_log (NULL, "invalid");
239 break;
240 }
241 AUD_log (NULL, "\n");
242 }
243
244 static int audio_validate_settings (struct audsettings *as)
245 {
246 int invalid;
247
248 invalid = as->nchannels < 1;
249 invalid |= as->endianness != 0 && as->endianness != 1;
250
251 switch (as->fmt) {
252 case AUDIO_FORMAT_S8:
253 case AUDIO_FORMAT_U8:
254 case AUDIO_FORMAT_S16:
255 case AUDIO_FORMAT_U16:
256 case AUDIO_FORMAT_S32:
257 case AUDIO_FORMAT_U32:
258 case AUDIO_FORMAT_F32:
259 break;
260 default:
261 invalid = 1;
262 break;
263 }
264
265 invalid |= as->freq <= 0;
266 return invalid ? -1 : 0;
267 }
268
269 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
270 {
271 int bits = 8;
272 bool is_signed = false, is_float = false;
273
274 switch (as->fmt) {
275 case AUDIO_FORMAT_S8:
276 is_signed = true;
277 /* fall through */
278 case AUDIO_FORMAT_U8:
279 break;
280
281 case AUDIO_FORMAT_S16:
282 is_signed = true;
283 /* fall through */
284 case AUDIO_FORMAT_U16:
285 bits = 16;
286 break;
287
288 case AUDIO_FORMAT_F32:
289 is_float = true;
290 /* fall through */
291 case AUDIO_FORMAT_S32:
292 is_signed = true;
293 /* fall through */
294 case AUDIO_FORMAT_U32:
295 bits = 32;
296 break;
297
298 default:
299 abort();
300 }
301 return info->freq == as->freq
302 && info->nchannels == as->nchannels
303 && info->is_signed == is_signed
304 && info->is_float == is_float
305 && info->bits == bits
306 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
307 }
308
309 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
310 {
311 int bits = 8, mul;
312 bool is_signed = false, is_float = false;
313
314 switch (as->fmt) {
315 case AUDIO_FORMAT_S8:
316 is_signed = true;
317 /* fall through */
318 case AUDIO_FORMAT_U8:
319 mul = 1;
320 break;
321
322 case AUDIO_FORMAT_S16:
323 is_signed = true;
324 /* fall through */
325 case AUDIO_FORMAT_U16:
326 bits = 16;
327 mul = 2;
328 break;
329
330 case AUDIO_FORMAT_F32:
331 is_float = true;
332 /* fall through */
333 case AUDIO_FORMAT_S32:
334 is_signed = true;
335 /* fall through */
336 case AUDIO_FORMAT_U32:
337 bits = 32;
338 mul = 4;
339 break;
340
341 default:
342 abort();
343 }
344
345 info->freq = as->freq;
346 info->bits = bits;
347 info->is_signed = is_signed;
348 info->is_float = is_float;
349 info->nchannels = as->nchannels;
350 info->bytes_per_frame = as->nchannels * mul;
351 info->bytes_per_second = info->freq * info->bytes_per_frame;
352 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
353 }
354
355 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
356 {
357 if (!len) {
358 return;
359 }
360
361 if (info->is_signed || info->is_float) {
362 memset(buf, 0x00, len * info->bytes_per_frame);
363 }
364 else {
365 switch (info->bits) {
366 case 8:
367 memset(buf, 0x80, len * info->bytes_per_frame);
368 break;
369
370 case 16:
371 {
372 int i;
373 uint16_t *p = buf;
374 short s = INT16_MAX;
375
376 if (info->swap_endianness) {
377 s = bswap16 (s);
378 }
379
380 for (i = 0; i < len * info->nchannels; i++) {
381 p[i] = s;
382 }
383 }
384 break;
385
386 case 32:
387 {
388 int i;
389 uint32_t *p = buf;
390 int32_t s = INT32_MAX;
391
392 if (info->swap_endianness) {
393 s = bswap32 (s);
394 }
395
396 for (i = 0; i < len * info->nchannels; i++) {
397 p[i] = s;
398 }
399 }
400 break;
401
402 default:
403 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
404 info->bits);
405 break;
406 }
407 }
408 }
409
410 /*
411 * Capture
412 */
413 static void noop_conv (struct st_sample *dst, const void *src, int samples)
414 {
415 (void) src;
416 (void) dst;
417 (void) samples;
418 }
419
420 static CaptureVoiceOut *audio_pcm_capture_find_specific(AudioState *s,
421 struct audsettings *as)
422 {
423 CaptureVoiceOut *cap;
424
425 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
426 if (audio_pcm_info_eq (&cap->hw.info, as)) {
427 return cap;
428 }
429 }
430 return NULL;
431 }
432
433 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
434 {
435 struct capture_callback *cb;
436
437 #ifdef DEBUG_CAPTURE
438 dolog ("notification %d sent\n", cmd);
439 #endif
440 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
441 cb->ops.notify (cb->opaque, cmd);
442 }
443 }
444
445 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
446 {
447 if (cap->hw.enabled != enabled) {
448 audcnotification_e cmd;
449 cap->hw.enabled = enabled;
450 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
451 audio_notify_capture (cap, cmd);
452 }
453 }
454
455 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
456 {
457 HWVoiceOut *hw = &cap->hw;
458 SWVoiceOut *sw;
459 int enabled = 0;
460
461 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
462 if (sw->active) {
463 enabled = 1;
464 break;
465 }
466 }
467 audio_capture_maybe_changed (cap, enabled);
468 }
469
470 static void audio_detach_capture (HWVoiceOut *hw)
471 {
472 SWVoiceCap *sc = hw->cap_head.lh_first;
473
474 while (sc) {
475 SWVoiceCap *sc1 = sc->entries.le_next;
476 SWVoiceOut *sw = &sc->sw;
477 CaptureVoiceOut *cap = sc->cap;
478 int was_active = sw->active;
479
480 if (sw->rate) {
481 st_rate_stop (sw->rate);
482 sw->rate = NULL;
483 }
484
485 QLIST_REMOVE (sw, entries);
486 QLIST_REMOVE (sc, entries);
487 g_free (sc);
488 if (was_active) {
489 /* We have removed soft voice from the capture:
490 this might have changed the overall status of the capture
491 since this might have been the only active voice */
492 audio_recalc_and_notify_capture (cap);
493 }
494 sc = sc1;
495 }
496 }
497
498 static int audio_attach_capture (HWVoiceOut *hw)
499 {
500 AudioState *s = hw->s;
501 CaptureVoiceOut *cap;
502
503 audio_detach_capture (hw);
504 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
505 SWVoiceCap *sc;
506 SWVoiceOut *sw;
507 HWVoiceOut *hw_cap = &cap->hw;
508
509 sc = g_malloc0(sizeof(*sc));
510
511 sc->cap = cap;
512 sw = &sc->sw;
513 sw->hw = hw_cap;
514 sw->info = hw->info;
515 sw->empty = 1;
516 sw->active = hw->enabled;
517 sw->conv = noop_conv;
518 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
519 sw->vol = nominal_volume;
520 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
521 if (!sw->rate) {
522 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
523 g_free (sw);
524 return -1;
525 }
526 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
527 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
528 #ifdef DEBUG_CAPTURE
529 sw->name = g_strdup_printf ("for %p %d,%d,%d",
530 hw, sw->info.freq, sw->info.bits,
531 sw->info.nchannels);
532 dolog ("Added %s active = %d\n", sw->name, sw->active);
533 #endif
534 if (sw->active) {
535 audio_capture_maybe_changed (cap, 1);
536 }
537 }
538 return 0;
539 }
540
541 /*
542 * Hard voice (capture)
543 */
544 static size_t audio_pcm_hw_find_min_in (HWVoiceIn *hw)
545 {
546 SWVoiceIn *sw;
547 size_t m = hw->total_samples_captured;
548
549 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
550 if (sw->active) {
551 m = MIN (m, sw->total_hw_samples_acquired);
552 }
553 }
554 return m;
555 }
556
557 static size_t audio_pcm_hw_get_live_in(HWVoiceIn *hw)
558 {
559 size_t live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
560 if (audio_bug(__func__, live > hw->conv_buf->size)) {
561 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size);
562 return 0;
563 }
564 return live;
565 }
566
567 static void audio_pcm_hw_clip_out(HWVoiceOut *hw, void *pcm_buf, size_t len)
568 {
569 size_t clipped = 0;
570 size_t pos = hw->mix_buf->pos;
571
572 while (len) {
573 st_sample *src = hw->mix_buf->samples + pos;
574 uint8_t *dst = advance(pcm_buf, clipped * hw->info.bytes_per_frame);
575 size_t samples_till_end_of_buf = hw->mix_buf->size - pos;
576 size_t samples_to_clip = MIN(len, samples_till_end_of_buf);
577
578 hw->clip(dst, src, samples_to_clip);
579
580 pos = (pos + samples_to_clip) % hw->mix_buf->size;
581 len -= samples_to_clip;
582 clipped += samples_to_clip;
583 }
584 }
585
586 /*
587 * Soft voice (capture)
588 */
589 static size_t audio_pcm_sw_get_rpos_in(SWVoiceIn *sw)
590 {
591 HWVoiceIn *hw = sw->hw;
592 ssize_t live = hw->total_samples_captured - sw->total_hw_samples_acquired;
593 ssize_t rpos;
594
595 if (audio_bug(__func__, live < 0 || live > hw->conv_buf->size)) {
596 dolog("live=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size);
597 return 0;
598 }
599
600 rpos = hw->conv_buf->pos - live;
601 if (rpos >= 0) {
602 return rpos;
603 }
604 else {
605 return hw->conv_buf->size + rpos;
606 }
607 }
608
609 static size_t audio_pcm_sw_read(SWVoiceIn *sw, void *buf, size_t size)
610 {
611 HWVoiceIn *hw = sw->hw;
612 size_t samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
613 struct st_sample *src, *dst = sw->buf;
614
615 rpos = audio_pcm_sw_get_rpos_in(sw) % hw->conv_buf->size;
616
617 live = hw->total_samples_captured - sw->total_hw_samples_acquired;
618 if (audio_bug(__func__, live > hw->conv_buf->size)) {
619 dolog("live_in=%zu hw->conv_buf->size=%zu\n", live, hw->conv_buf->size);
620 return 0;
621 }
622
623 samples = size / sw->info.bytes_per_frame;
624 if (!live) {
625 return 0;
626 }
627
628 swlim = (live * sw->ratio) >> 32;
629 swlim = MIN (swlim, samples);
630
631 while (swlim) {
632 src = hw->conv_buf->samples + rpos;
633 if (hw->conv_buf->pos > rpos) {
634 isamp = hw->conv_buf->pos - rpos;
635 } else {
636 isamp = hw->conv_buf->size - rpos;
637 }
638
639 if (!isamp) {
640 break;
641 }
642 osamp = swlim;
643
644 st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
645 swlim -= osamp;
646 rpos = (rpos + isamp) % hw->conv_buf->size;
647 dst += osamp;
648 ret += osamp;
649 total += isamp;
650 }
651
652 if (hw->pcm_ops && !hw->pcm_ops->volume_in) {
653 mixeng_volume (sw->buf, ret, &sw->vol);
654 }
655
656 sw->clip (buf, sw->buf, ret);
657 sw->total_hw_samples_acquired += total;
658 return ret * sw->info.bytes_per_frame;
659 }
660
661 /*
662 * Hard voice (playback)
663 */
664 static size_t audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
665 {
666 SWVoiceOut *sw;
667 size_t m = SIZE_MAX;
668 int nb_live = 0;
669
670 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
671 if (sw->active || !sw->empty) {
672 m = MIN (m, sw->total_hw_samples_mixed);
673 nb_live += 1;
674 }
675 }
676
677 *nb_livep = nb_live;
678 return m;
679 }
680
681 static size_t audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
682 {
683 size_t smin;
684 int nb_live1;
685
686 smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
687 if (nb_live) {
688 *nb_live = nb_live1;
689 }
690
691 if (nb_live1) {
692 size_t live = smin;
693
694 if (audio_bug(__func__, live > hw->mix_buf->size)) {
695 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size);
696 return 0;
697 }
698 return live;
699 }
700 return 0;
701 }
702
703 /*
704 * Soft voice (playback)
705 */
706 static size_t audio_pcm_sw_write(SWVoiceOut *sw, void *buf, size_t size)
707 {
708 size_t hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
709 size_t ret = 0, pos = 0, total = 0;
710
711 if (!sw) {
712 return size;
713 }
714
715 hwsamples = sw->hw->mix_buf->size;
716
717 live = sw->total_hw_samples_mixed;
718 if (audio_bug(__func__, live > hwsamples)) {
719 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hwsamples);
720 return 0;
721 }
722
723 if (live == hwsamples) {
724 #ifdef DEBUG_OUT
725 dolog ("%s is full %d\n", sw->name, live);
726 #endif
727 return 0;
728 }
729
730 wpos = (sw->hw->mix_buf->pos + live) % hwsamples;
731 samples = size / sw->info.bytes_per_frame;
732
733 dead = hwsamples - live;
734 swlim = ((int64_t) dead << 32) / sw->ratio;
735 swlim = MIN (swlim, samples);
736 if (swlim) {
737 sw->conv (sw->buf, buf, swlim);
738
739 if (sw->hw->pcm_ops && !sw->hw->pcm_ops->volume_out) {
740 mixeng_volume (sw->buf, swlim, &sw->vol);
741 }
742 }
743
744 while (swlim) {
745 dead = hwsamples - live;
746 left = hwsamples - wpos;
747 blck = MIN (dead, left);
748 if (!blck) {
749 break;
750 }
751 isamp = swlim;
752 osamp = blck;
753 st_rate_flow_mix (
754 sw->rate,
755 sw->buf + pos,
756 sw->hw->mix_buf->samples + wpos,
757 &isamp,
758 &osamp
759 );
760 ret += isamp;
761 swlim -= isamp;
762 pos += isamp;
763 live += osamp;
764 wpos = (wpos + osamp) % hwsamples;
765 total += osamp;
766 }
767
768 sw->total_hw_samples_mixed += total;
769 sw->empty = sw->total_hw_samples_mixed == 0;
770
771 #ifdef DEBUG_OUT
772 dolog (
773 "%s: write size %zu ret %zu total sw %zu\n",
774 SW_NAME (sw),
775 size / sw->info.bytes_per_frame,
776 ret,
777 sw->total_hw_samples_mixed
778 );
779 #endif
780
781 return ret * sw->info.bytes_per_frame;
782 }
783
784 #ifdef DEBUG_AUDIO
785 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
786 {
787 dolog("%s: bits %d, sign %d, float %d, freq %d, nchan %d\n",
788 cap, info->bits, info->is_signed, info->is_float, info->freq,
789 info->nchannels);
790 }
791 #endif
792
793 #define DAC
794 #include "audio_template.h"
795 #undef DAC
796 #include "audio_template.h"
797
798 /*
799 * Timer
800 */
801 static int audio_is_timer_needed(AudioState *s)
802 {
803 HWVoiceIn *hwi = NULL;
804 HWVoiceOut *hwo = NULL;
805
806 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) {
807 if (!hwo->poll_mode) return 1;
808 }
809 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) {
810 if (!hwi->poll_mode) return 1;
811 }
812 return 0;
813 }
814
815 static void audio_reset_timer (AudioState *s)
816 {
817 if (audio_is_timer_needed(s)) {
818 timer_mod_anticipate_ns(s->ts,
819 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks);
820 if (!s->timer_running) {
821 s->timer_running = true;
822 s->timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
823 trace_audio_timer_start(s->period_ticks / SCALE_MS);
824 }
825 } else {
826 timer_del(s->ts);
827 if (s->timer_running) {
828 s->timer_running = false;
829 trace_audio_timer_stop();
830 }
831 }
832 }
833
834 static void audio_timer (void *opaque)
835 {
836 int64_t now, diff;
837 AudioState *s = opaque;
838
839 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
840 diff = now - s->timer_last;
841 if (diff > s->period_ticks * 3 / 2) {
842 trace_audio_timer_delayed(diff / SCALE_MS);
843 }
844 s->timer_last = now;
845
846 audio_run(s, "timer");
847 audio_reset_timer(s);
848 }
849
850 /*
851 * Public API
852 */
853 size_t AUD_write(SWVoiceOut *sw, void *buf, size_t size)
854 {
855 HWVoiceOut *hw;
856
857 if (!sw) {
858 /* XXX: Consider options */
859 return size;
860 }
861 hw = sw->hw;
862
863 if (!hw->enabled) {
864 dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
865 return 0;
866 }
867
868 if (audio_get_pdo_out(hw->s->dev)->mixing_engine) {
869 return audio_pcm_sw_write(sw, buf, size);
870 } else {
871 return hw->pcm_ops->write(hw, buf, size);
872 }
873 }
874
875 size_t AUD_read(SWVoiceIn *sw, void *buf, size_t size)
876 {
877 HWVoiceIn *hw;
878
879 if (!sw) {
880 /* XXX: Consider options */
881 return size;
882 }
883 hw = sw->hw;
884
885 if (!hw->enabled) {
886 dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
887 return 0;
888 }
889
890 if (audio_get_pdo_in(hw->s->dev)->mixing_engine) {
891 return audio_pcm_sw_read(sw, buf, size);
892 } else {
893 return hw->pcm_ops->read(hw, buf, size);
894 }
895 }
896
897 int AUD_get_buffer_size_out(SWVoiceOut *sw)
898 {
899 return sw->hw->samples * sw->hw->info.bytes_per_frame;
900 }
901
902 void AUD_set_active_out (SWVoiceOut *sw, int on)
903 {
904 HWVoiceOut *hw;
905
906 if (!sw) {
907 return;
908 }
909
910 hw = sw->hw;
911 if (sw->active != on) {
912 AudioState *s = sw->s;
913 SWVoiceOut *temp_sw;
914 SWVoiceCap *sc;
915
916 if (on) {
917 hw->pending_disable = 0;
918 if (!hw->enabled) {
919 hw->enabled = 1;
920 if (s->vm_running) {
921 if (hw->pcm_ops->enable_out) {
922 hw->pcm_ops->enable_out(hw, true);
923 }
924 audio_reset_timer (s);
925 }
926 }
927 }
928 else {
929 if (hw->enabled) {
930 int nb_active = 0;
931
932 for (temp_sw = hw->sw_head.lh_first; temp_sw;
933 temp_sw = temp_sw->entries.le_next) {
934 nb_active += temp_sw->active != 0;
935 }
936
937 hw->pending_disable = nb_active == 1;
938 }
939 }
940
941 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
942 sc->sw.active = hw->enabled;
943 if (hw->enabled) {
944 audio_capture_maybe_changed (sc->cap, 1);
945 }
946 }
947 sw->active = on;
948 }
949 }
950
951 void AUD_set_active_in (SWVoiceIn *sw, int on)
952 {
953 HWVoiceIn *hw;
954
955 if (!sw) {
956 return;
957 }
958
959 hw = sw->hw;
960 if (sw->active != on) {
961 AudioState *s = sw->s;
962 SWVoiceIn *temp_sw;
963
964 if (on) {
965 if (!hw->enabled) {
966 hw->enabled = 1;
967 if (s->vm_running) {
968 if (hw->pcm_ops->enable_in) {
969 hw->pcm_ops->enable_in(hw, true);
970 }
971 audio_reset_timer (s);
972 }
973 }
974 sw->total_hw_samples_acquired = hw->total_samples_captured;
975 }
976 else {
977 if (hw->enabled) {
978 int nb_active = 0;
979
980 for (temp_sw = hw->sw_head.lh_first; temp_sw;
981 temp_sw = temp_sw->entries.le_next) {
982 nb_active += temp_sw->active != 0;
983 }
984
985 if (nb_active == 1) {
986 hw->enabled = 0;
987 if (hw->pcm_ops->enable_in) {
988 hw->pcm_ops->enable_in(hw, false);
989 }
990 }
991 }
992 }
993 sw->active = on;
994 }
995 }
996
997 static size_t audio_get_avail (SWVoiceIn *sw)
998 {
999 size_t live;
1000
1001 if (!sw) {
1002 return 0;
1003 }
1004
1005 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1006 if (audio_bug(__func__, live > sw->hw->conv_buf->size)) {
1007 dolog("live=%zu sw->hw->conv_buf->size=%zu\n", live,
1008 sw->hw->conv_buf->size);
1009 return 0;
1010 }
1011
1012 ldebug (
1013 "%s: get_avail live %d ret %" PRId64 "\n",
1014 SW_NAME (sw),
1015 live, (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame
1016 );
1017
1018 return (((int64_t) live << 32) / sw->ratio) * sw->info.bytes_per_frame;
1019 }
1020
1021 static size_t audio_get_free(SWVoiceOut *sw)
1022 {
1023 size_t live, dead;
1024
1025 if (!sw) {
1026 return 0;
1027 }
1028
1029 live = sw->total_hw_samples_mixed;
1030
1031 if (audio_bug(__func__, live > sw->hw->mix_buf->size)) {
1032 dolog("live=%zu sw->hw->mix_buf->size=%zu\n", live,
1033 sw->hw->mix_buf->size);
1034 return 0;
1035 }
1036
1037 dead = sw->hw->mix_buf->size - live;
1038
1039 #ifdef DEBUG_OUT
1040 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1041 SW_NAME (sw),
1042 live, dead, (((int64_t) dead << 32) / sw->ratio) *
1043 sw->info.bytes_per_frame);
1044 #endif
1045
1046 return (((int64_t) dead << 32) / sw->ratio) * sw->info.bytes_per_frame;
1047 }
1048
1049 static void audio_capture_mix_and_clear(HWVoiceOut *hw, size_t rpos,
1050 size_t samples)
1051 {
1052 size_t n;
1053
1054 if (hw->enabled) {
1055 SWVoiceCap *sc;
1056
1057 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1058 SWVoiceOut *sw = &sc->sw;
1059 int rpos2 = rpos;
1060
1061 n = samples;
1062 while (n) {
1063 size_t till_end_of_hw = hw->mix_buf->size - rpos2;
1064 size_t to_write = MIN(till_end_of_hw, n);
1065 size_t bytes = to_write * hw->info.bytes_per_frame;
1066 size_t written;
1067
1068 sw->buf = hw->mix_buf->samples + rpos2;
1069 written = audio_pcm_sw_write (sw, NULL, bytes);
1070 if (written - bytes) {
1071 dolog("Could not mix %zu bytes into a capture "
1072 "buffer, mixed %zu\n",
1073 bytes, written);
1074 break;
1075 }
1076 n -= to_write;
1077 rpos2 = (rpos2 + to_write) % hw->mix_buf->size;
1078 }
1079 }
1080 }
1081
1082 n = MIN(samples, hw->mix_buf->size - rpos);
1083 mixeng_clear(hw->mix_buf->samples + rpos, n);
1084 mixeng_clear(hw->mix_buf->samples, samples - n);
1085 }
1086
1087 static size_t audio_pcm_hw_run_out(HWVoiceOut *hw, size_t live)
1088 {
1089 size_t clipped = 0;
1090
1091 while (live) {
1092 size_t size, decr, proc;
1093 void *buf = hw->pcm_ops->get_buffer_out(hw, &size);
1094 if (!buf || size == 0) {
1095 break;
1096 }
1097
1098 decr = MIN(size / hw->info.bytes_per_frame, live);
1099 audio_pcm_hw_clip_out(hw, buf, decr);
1100 proc = hw->pcm_ops->put_buffer_out(hw, buf,
1101 decr * hw->info.bytes_per_frame) /
1102 hw->info.bytes_per_frame;
1103
1104 live -= proc;
1105 clipped += proc;
1106 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size;
1107
1108 if (proc == 0 || proc < decr) {
1109 break;
1110 }
1111 }
1112
1113 if (hw->pcm_ops->run_buffer_out) {
1114 hw->pcm_ops->run_buffer_out(hw);
1115 }
1116
1117 return clipped;
1118 }
1119
1120 static void audio_run_out (AudioState *s)
1121 {
1122 HWVoiceOut *hw = NULL;
1123 SWVoiceOut *sw;
1124
1125 if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1126 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1127 /* there is exactly 1 sw for each hw with no mixeng */
1128 sw = hw->sw_head.lh_first;
1129
1130 if (hw->pending_disable) {
1131 hw->enabled = 0;
1132 hw->pending_disable = 0;
1133 if (hw->pcm_ops->enable_out) {
1134 hw->pcm_ops->enable_out(hw, false);
1135 }
1136 }
1137
1138 if (sw->active) {
1139 sw->callback.fn(sw->callback.opaque, INT_MAX);
1140 }
1141 }
1142 return;
1143 }
1144
1145 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1146 size_t played, live, prev_rpos, free;
1147 int nb_live, cleanup_required;
1148
1149 live = audio_pcm_hw_get_live_out (hw, &nb_live);
1150 if (!nb_live) {
1151 live = 0;
1152 }
1153
1154 if (audio_bug(__func__, live > hw->mix_buf->size)) {
1155 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size);
1156 continue;
1157 }
1158
1159 if (hw->pending_disable && !nb_live) {
1160 SWVoiceCap *sc;
1161 #ifdef DEBUG_OUT
1162 dolog ("Disabling voice\n");
1163 #endif
1164 hw->enabled = 0;
1165 hw->pending_disable = 0;
1166 if (hw->pcm_ops->enable_out) {
1167 hw->pcm_ops->enable_out(hw, false);
1168 }
1169 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1170 sc->sw.active = 0;
1171 audio_recalc_and_notify_capture (sc->cap);
1172 }
1173 continue;
1174 }
1175
1176 if (!live) {
1177 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1178 if (sw->active) {
1179 free = audio_get_free (sw);
1180 if (free > 0) {
1181 sw->callback.fn (sw->callback.opaque, free);
1182 }
1183 }
1184 }
1185 continue;
1186 }
1187
1188 prev_rpos = hw->mix_buf->pos;
1189 played = audio_pcm_hw_run_out(hw, live);
1190 replay_audio_out(&played);
1191 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) {
1192 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n",
1193 hw->mix_buf->pos, hw->mix_buf->size, played);
1194 hw->mix_buf->pos = 0;
1195 }
1196
1197 #ifdef DEBUG_OUT
1198 dolog("played=%zu\n", played);
1199 #endif
1200
1201 if (played) {
1202 hw->ts_helper += played;
1203 audio_capture_mix_and_clear (hw, prev_rpos, played);
1204 }
1205
1206 cleanup_required = 0;
1207 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1208 if (!sw->active && sw->empty) {
1209 continue;
1210 }
1211
1212 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1213 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n",
1214 played, sw->total_hw_samples_mixed);
1215 played = sw->total_hw_samples_mixed;
1216 }
1217
1218 sw->total_hw_samples_mixed -= played;
1219
1220 if (!sw->total_hw_samples_mixed) {
1221 sw->empty = 1;
1222 cleanup_required |= !sw->active && !sw->callback.fn;
1223 }
1224
1225 if (sw->active) {
1226 free = audio_get_free (sw);
1227 if (free > 0) {
1228 sw->callback.fn (sw->callback.opaque, free);
1229 }
1230 }
1231 }
1232
1233 if (cleanup_required) {
1234 SWVoiceOut *sw1;
1235
1236 sw = hw->sw_head.lh_first;
1237 while (sw) {
1238 sw1 = sw->entries.le_next;
1239 if (!sw->active && !sw->callback.fn) {
1240 audio_close_out (sw);
1241 }
1242 sw = sw1;
1243 }
1244 }
1245 }
1246 }
1247
1248 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples)
1249 {
1250 size_t conv = 0;
1251 STSampleBuffer *conv_buf = hw->conv_buf;
1252
1253 while (samples) {
1254 size_t proc;
1255 size_t size = samples * hw->info.bytes_per_frame;
1256 void *buf = hw->pcm_ops->get_buffer_in(hw, &size);
1257
1258 assert(size % hw->info.bytes_per_frame == 0);
1259 if (size == 0) {
1260 hw->pcm_ops->put_buffer_in(hw, buf, size);
1261 break;
1262 }
1263
1264 proc = MIN(size / hw->info.bytes_per_frame,
1265 conv_buf->size - conv_buf->pos);
1266
1267 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc);
1268 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size;
1269
1270 samples -= proc;
1271 conv += proc;
1272 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame);
1273 }
1274
1275 return conv;
1276 }
1277
1278 static void audio_run_in (AudioState *s)
1279 {
1280 HWVoiceIn *hw = NULL;
1281
1282 if (!audio_get_pdo_in(s->dev)->mixing_engine) {
1283 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1284 /* there is exactly 1 sw for each hw with no mixeng */
1285 SWVoiceIn *sw = hw->sw_head.lh_first;
1286 if (sw->active) {
1287 sw->callback.fn(sw->callback.opaque, INT_MAX);
1288 }
1289 }
1290 return;
1291 }
1292
1293 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1294 SWVoiceIn *sw;
1295 size_t captured = 0, min;
1296
1297 if (replay_mode != REPLAY_MODE_PLAY) {
1298 captured = audio_pcm_hw_run_in(
1299 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw));
1300 }
1301 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos,
1302 hw->conv_buf->size);
1303
1304 min = audio_pcm_hw_find_min_in (hw);
1305 hw->total_samples_captured += captured - min;
1306 hw->ts_helper += captured;
1307
1308 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1309 sw->total_hw_samples_acquired -= min;
1310
1311 if (sw->active) {
1312 size_t avail;
1313
1314 avail = audio_get_avail (sw);
1315 if (avail > 0) {
1316 sw->callback.fn (sw->callback.opaque, avail);
1317 }
1318 }
1319 }
1320 }
1321 }
1322
1323 static void audio_run_capture (AudioState *s)
1324 {
1325 CaptureVoiceOut *cap;
1326
1327 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1328 size_t live, rpos, captured;
1329 HWVoiceOut *hw = &cap->hw;
1330 SWVoiceOut *sw;
1331
1332 captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1333 rpos = hw->mix_buf->pos;
1334 while (live) {
1335 size_t left = hw->mix_buf->size - rpos;
1336 size_t to_capture = MIN(live, left);
1337 struct st_sample *src;
1338 struct capture_callback *cb;
1339
1340 src = hw->mix_buf->samples + rpos;
1341 hw->clip (cap->buf, src, to_capture);
1342 mixeng_clear (src, to_capture);
1343
1344 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1345 cb->ops.capture (cb->opaque, cap->buf,
1346 to_capture * hw->info.bytes_per_frame);
1347 }
1348 rpos = (rpos + to_capture) % hw->mix_buf->size;
1349 live -= to_capture;
1350 }
1351 hw->mix_buf->pos = rpos;
1352
1353 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1354 if (!sw->active && sw->empty) {
1355 continue;
1356 }
1357
1358 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1359 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n",
1360 captured, sw->total_hw_samples_mixed);
1361 captured = sw->total_hw_samples_mixed;
1362 }
1363
1364 sw->total_hw_samples_mixed -= captured;
1365 sw->empty = sw->total_hw_samples_mixed == 0;
1366 }
1367 }
1368 }
1369
1370 void audio_run(AudioState *s, const char *msg)
1371 {
1372 audio_run_out(s);
1373 audio_run_in(s);
1374 audio_run_capture(s);
1375
1376 #ifdef DEBUG_POLL
1377 {
1378 static double prevtime;
1379 double currtime;
1380 struct timeval tv;
1381
1382 if (gettimeofday (&tv, NULL)) {
1383 perror ("audio_run: gettimeofday");
1384 return;
1385 }
1386
1387 currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1388 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1389 prevtime = currtime;
1390 }
1391 #endif
1392 }
1393
1394 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size)
1395 {
1396 ssize_t start;
1397
1398 if (unlikely(!hw->buf_emul)) {
1399 size_t calc_size = hw->conv_buf->size * hw->info.bytes_per_frame;
1400 hw->buf_emul = g_malloc(calc_size);
1401 hw->size_emul = calc_size;
1402 hw->pos_emul = hw->pending_emul = 0;
1403 }
1404
1405 while (hw->pending_emul < hw->size_emul) {
1406 size_t read_len = MIN(hw->size_emul - hw->pos_emul,
1407 hw->size_emul - hw->pending_emul);
1408 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul,
1409 read_len);
1410 hw->pending_emul += read;
1411 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul;
1412 if (read < read_len) {
1413 break;
1414 }
1415 }
1416
1417 start = ((ssize_t) hw->pos_emul) - hw->pending_emul;
1418 if (start < 0) {
1419 start += hw->size_emul;
1420 }
1421 assert(start >= 0 && start < hw->size_emul);
1422
1423 *size = MIN(*size, hw->pending_emul);
1424 *size = MIN(*size, hw->size_emul - start);
1425 return hw->buf_emul + start;
1426 }
1427
1428 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
1429 {
1430 assert(size <= hw->pending_emul);
1431 hw->pending_emul -= size;
1432 }
1433
1434 void audio_generic_run_buffer_out(HWVoiceOut *hw)
1435 {
1436 while (hw->pending_emul) {
1437 size_t write_len, written;
1438 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul;
1439
1440 if (start < 0) {
1441 start += hw->size_emul;
1442 }
1443 assert(start >= 0 && start < hw->size_emul);
1444
1445 write_len = MIN(hw->pending_emul, hw->size_emul - start);
1446
1447 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len);
1448 hw->pending_emul -= written;
1449
1450 if (written < write_len) {
1451 break;
1452 }
1453 }
1454 }
1455
1456 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size)
1457 {
1458 if (unlikely(!hw->buf_emul)) {
1459 size_t calc_size = hw->mix_buf->size * hw->info.bytes_per_frame;
1460
1461 hw->buf_emul = g_malloc(calc_size);
1462 hw->size_emul = calc_size;
1463 hw->pos_emul = hw->pending_emul = 0;
1464 }
1465
1466 *size = MIN(hw->size_emul - hw->pending_emul,
1467 hw->size_emul - hw->pos_emul);
1468 return hw->buf_emul + hw->pos_emul;
1469 }
1470
1471 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
1472 {
1473 assert(buf == hw->buf_emul + hw->pos_emul &&
1474 size + hw->pending_emul <= hw->size_emul);
1475
1476 hw->pending_emul += size;
1477 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
1478
1479 return size;
1480 }
1481
1482 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size)
1483 {
1484 size_t dst_size, copy_size;
1485 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size);
1486 copy_size = MIN(size, dst_size);
1487
1488 memcpy(dst, buf, copy_size);
1489 return hw->pcm_ops->put_buffer_out(hw, dst, copy_size);
1490 }
1491
1492 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size)
1493 {
1494 void *src = hw->pcm_ops->get_buffer_in(hw, &size);
1495
1496 memcpy(buf, src, size);
1497 hw->pcm_ops->put_buffer_in(hw, src, size);
1498
1499 return size;
1500 }
1501
1502 static int audio_driver_init(AudioState *s, struct audio_driver *drv,
1503 bool msg, Audiodev *dev)
1504 {
1505 s->drv_opaque = drv->init(dev);
1506
1507 if (s->drv_opaque) {
1508 if (!drv->pcm_ops->get_buffer_in) {
1509 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in;
1510 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in;
1511 }
1512 if (!drv->pcm_ops->get_buffer_out) {
1513 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out;
1514 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out;
1515 }
1516
1517 audio_init_nb_voices_out(s, drv);
1518 audio_init_nb_voices_in(s, drv);
1519 s->drv = drv;
1520 return 0;
1521 }
1522 else {
1523 if (msg) {
1524 dolog("Could not init `%s' audio driver\n", drv->name);
1525 }
1526 return -1;
1527 }
1528 }
1529
1530 static void audio_vm_change_state_handler (void *opaque, int running,
1531 RunState state)
1532 {
1533 AudioState *s = opaque;
1534 HWVoiceOut *hwo = NULL;
1535 HWVoiceIn *hwi = NULL;
1536
1537 s->vm_running = running;
1538 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) {
1539 if (hwo->pcm_ops->enable_out) {
1540 hwo->pcm_ops->enable_out(hwo, running);
1541 }
1542 }
1543
1544 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) {
1545 if (hwi->pcm_ops->enable_in) {
1546 hwi->pcm_ops->enable_in(hwi, running);
1547 }
1548 }
1549 audio_reset_timer (s);
1550 }
1551
1552 static bool is_cleaning_up;
1553
1554 bool audio_is_cleaning_up(void)
1555 {
1556 return is_cleaning_up;
1557 }
1558
1559 static void free_audio_state(AudioState *s)
1560 {
1561 HWVoiceOut *hwo, *hwon;
1562 HWVoiceIn *hwi, *hwin;
1563
1564 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) {
1565 SWVoiceCap *sc;
1566
1567 if (hwo->enabled && hwo->pcm_ops->enable_out) {
1568 hwo->pcm_ops->enable_out(hwo, false);
1569 }
1570 hwo->pcm_ops->fini_out (hwo);
1571
1572 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1573 CaptureVoiceOut *cap = sc->cap;
1574 struct capture_callback *cb;
1575
1576 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1577 cb->ops.destroy (cb->opaque);
1578 }
1579 }
1580 QLIST_REMOVE(hwo, entries);
1581 }
1582
1583 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) {
1584 if (hwi->enabled && hwi->pcm_ops->enable_in) {
1585 hwi->pcm_ops->enable_in(hwi, false);
1586 }
1587 hwi->pcm_ops->fini_in (hwi);
1588 QLIST_REMOVE(hwi, entries);
1589 }
1590
1591 if (s->drv) {
1592 s->drv->fini (s->drv_opaque);
1593 s->drv = NULL;
1594 }
1595
1596 if (s->dev) {
1597 qapi_free_Audiodev(s->dev);
1598 s->dev = NULL;
1599 }
1600
1601 if (s->ts) {
1602 timer_free(s->ts);
1603 s->ts = NULL;
1604 }
1605
1606 g_free(s);
1607 }
1608
1609 void audio_cleanup(void)
1610 {
1611 is_cleaning_up = true;
1612 while (!QTAILQ_EMPTY(&audio_states)) {
1613 AudioState *s = QTAILQ_FIRST(&audio_states);
1614 QTAILQ_REMOVE(&audio_states, s, list);
1615 free_audio_state(s);
1616 }
1617 }
1618
1619 static const VMStateDescription vmstate_audio = {
1620 .name = "audio",
1621 .version_id = 1,
1622 .minimum_version_id = 1,
1623 .fields = (VMStateField[]) {
1624 VMSTATE_END_OF_LIST()
1625 }
1626 };
1627
1628 static void audio_validate_opts(Audiodev *dev, Error **errp);
1629
1630 static AudiodevListEntry *audiodev_find(
1631 AudiodevListHead *head, const char *drvname)
1632 {
1633 AudiodevListEntry *e;
1634 QSIMPLEQ_FOREACH(e, head, next) {
1635 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) {
1636 return e;
1637 }
1638 }
1639
1640 return NULL;
1641 }
1642
1643 /*
1644 * if we have dev, this function was called because of an -audiodev argument =>
1645 * initialize a new state with it
1646 * if dev == NULL => legacy implicit initialization, return the already created
1647 * state or create a new one
1648 */
1649 static AudioState *audio_init(Audiodev *dev, const char *name)
1650 {
1651 static bool atexit_registered;
1652 size_t i;
1653 int done = 0;
1654 const char *drvname = NULL;
1655 VMChangeStateEntry *e;
1656 AudioState *s;
1657 struct audio_driver *driver;
1658 /* silence gcc warning about uninitialized variable */
1659 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
1660
1661 if (dev) {
1662 /* -audiodev option */
1663 legacy_config = false;
1664 drvname = AudiodevDriver_str(dev->driver);
1665 } else if (!QTAILQ_EMPTY(&audio_states)) {
1666 if (!legacy_config) {
1667 dolog("Device %s: audiodev default parameter is deprecated, please "
1668 "specify audiodev=%s\n", name,
1669 QTAILQ_FIRST(&audio_states)->dev->id);
1670 }
1671 return QTAILQ_FIRST(&audio_states);
1672 } else {
1673 /* legacy implicit initialization */
1674 head = audio_handle_legacy_opts();
1675 /*
1676 * In case of legacy initialization, all Audiodevs in the list will have
1677 * the same configuration (except the driver), so it does't matter which
1678 * one we chose. We need an Audiodev to set up AudioState before we can
1679 * init a driver. Also note that dev at this point is still in the
1680 * list.
1681 */
1682 dev = QSIMPLEQ_FIRST(&head)->dev;
1683 audio_validate_opts(dev, &error_abort);
1684 }
1685
1686 s = g_malloc0(sizeof(AudioState));
1687 s->dev = dev;
1688
1689 QLIST_INIT (&s->hw_head_out);
1690 QLIST_INIT (&s->hw_head_in);
1691 QLIST_INIT (&s->cap_head);
1692 if (!atexit_registered) {
1693 atexit(audio_cleanup);
1694 atexit_registered = true;
1695 }
1696 QTAILQ_INSERT_TAIL(&audio_states, s, list);
1697
1698 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1699
1700 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
1701 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
1702
1703 if (s->nb_hw_voices_out <= 0) {
1704 dolog ("Bogus number of playback voices %d, setting to 1\n",
1705 s->nb_hw_voices_out);
1706 s->nb_hw_voices_out = 1;
1707 }
1708
1709 if (s->nb_hw_voices_in <= 0) {
1710 dolog ("Bogus number of capture voices %d, setting to 0\n",
1711 s->nb_hw_voices_in);
1712 s->nb_hw_voices_in = 0;
1713 }
1714
1715 if (drvname) {
1716 driver = audio_driver_lookup(drvname);
1717 if (driver) {
1718 done = !audio_driver_init(s, driver, true, dev);
1719 } else {
1720 dolog ("Unknown audio driver `%s'\n", drvname);
1721 }
1722 } else {
1723 for (i = 0; audio_prio_list[i]; i++) {
1724 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]);
1725 driver = audio_driver_lookup(audio_prio_list[i]);
1726
1727 if (e && driver) {
1728 s->dev = dev = e->dev;
1729 audio_validate_opts(dev, &error_abort);
1730 done = !audio_driver_init(s, driver, false, dev);
1731 if (done) {
1732 e->dev = NULL;
1733 break;
1734 }
1735 }
1736 }
1737 }
1738 audio_free_audiodev_list(&head);
1739
1740 if (!done) {
1741 driver = audio_driver_lookup("none");
1742 done = !audio_driver_init(s, driver, false, dev);
1743 assert(done);
1744 dolog("warning: Using timer based audio emulation\n");
1745 }
1746
1747 if (dev->timer_period <= 0) {
1748 s->period_ticks = 1;
1749 } else {
1750 s->period_ticks = dev->timer_period * (int64_t)SCALE_US;
1751 }
1752
1753 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1754 if (!e) {
1755 dolog ("warning: Could not register change state handler\n"
1756 "(Audio can continue looping even after stopping the VM)\n");
1757 }
1758
1759 QLIST_INIT (&s->card_head);
1760 vmstate_register (NULL, 0, &vmstate_audio, s);
1761 return s;
1762 }
1763
1764 void audio_free_audiodev_list(AudiodevListHead *head)
1765 {
1766 AudiodevListEntry *e;
1767 while ((e = QSIMPLEQ_FIRST(head))) {
1768 QSIMPLEQ_REMOVE_HEAD(head, next);
1769 qapi_free_Audiodev(e->dev);
1770 g_free(e);
1771 }
1772 }
1773
1774 void AUD_register_card (const char *name, QEMUSoundCard *card)
1775 {
1776 if (!card->state) {
1777 card->state = audio_init(NULL, name);
1778 }
1779
1780 card->name = g_strdup (name);
1781 memset (&card->entries, 0, sizeof (card->entries));
1782 QLIST_INSERT_HEAD(&card->state->card_head, card, entries);
1783 }
1784
1785 void AUD_remove_card (QEMUSoundCard *card)
1786 {
1787 QLIST_REMOVE (card, entries);
1788 g_free (card->name);
1789 }
1790
1791
1792 CaptureVoiceOut *AUD_add_capture(
1793 AudioState *s,
1794 struct audsettings *as,
1795 struct audio_capture_ops *ops,
1796 void *cb_opaque
1797 )
1798 {
1799 CaptureVoiceOut *cap;
1800 struct capture_callback *cb;
1801
1802 if (!s) {
1803 if (!legacy_config) {
1804 dolog("Capturing without setting an audiodev is deprecated\n");
1805 }
1806 s = audio_init(NULL, NULL);
1807 }
1808
1809 if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1810 dolog("Can't capture with mixeng disabled\n");
1811 return NULL;
1812 }
1813
1814 if (audio_validate_settings (as)) {
1815 dolog ("Invalid settings were passed when trying to add capture\n");
1816 audio_print_settings (as);
1817 return NULL;
1818 }
1819
1820 cb = g_malloc0(sizeof(*cb));
1821 cb->ops = *ops;
1822 cb->opaque = cb_opaque;
1823
1824 cap = audio_pcm_capture_find_specific(s, as);
1825 if (cap) {
1826 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1827 return cap;
1828 }
1829 else {
1830 HWVoiceOut *hw;
1831 CaptureVoiceOut *cap;
1832
1833 cap = g_malloc0(sizeof(*cap));
1834
1835 hw = &cap->hw;
1836 hw->s = s;
1837 QLIST_INIT (&hw->sw_head);
1838 QLIST_INIT (&cap->cb_head);
1839
1840 /* XXX find a more elegant way */
1841 hw->samples = 4096 * 4;
1842 audio_pcm_hw_alloc_resources_out(hw);
1843
1844 audio_pcm_init_info (&hw->info, as);
1845
1846 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame);
1847
1848 if (hw->info.is_float) {
1849 hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
1850 } else {
1851 hw->clip = mixeng_clip
1852 [hw->info.nchannels == 2]
1853 [hw->info.is_signed]
1854 [hw->info.swap_endianness]
1855 [audio_bits_to_index(hw->info.bits)];
1856 }
1857
1858 QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1859 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1860
1861 QLIST_FOREACH(hw, &s->hw_head_out, entries) {
1862 audio_attach_capture (hw);
1863 }
1864 return cap;
1865 }
1866 }
1867
1868 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1869 {
1870 struct capture_callback *cb;
1871
1872 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1873 if (cb->opaque == cb_opaque) {
1874 cb->ops.destroy (cb_opaque);
1875 QLIST_REMOVE (cb, entries);
1876 g_free (cb);
1877
1878 if (!cap->cb_head.lh_first) {
1879 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1880
1881 while (sw) {
1882 SWVoiceCap *sc = (SWVoiceCap *) sw;
1883 #ifdef DEBUG_CAPTURE
1884 dolog ("freeing %s\n", sw->name);
1885 #endif
1886
1887 sw1 = sw->entries.le_next;
1888 if (sw->rate) {
1889 st_rate_stop (sw->rate);
1890 sw->rate = NULL;
1891 }
1892 QLIST_REMOVE (sw, entries);
1893 QLIST_REMOVE (sc, entries);
1894 g_free (sc);
1895 sw = sw1;
1896 }
1897 QLIST_REMOVE (cap, entries);
1898 g_free (cap->hw.mix_buf);
1899 g_free (cap->buf);
1900 g_free (cap);
1901 }
1902 return;
1903 }
1904 }
1905 }
1906
1907 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1908 {
1909 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1910 audio_set_volume_out(sw, &vol);
1911 }
1912
1913 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol)
1914 {
1915 if (sw) {
1916 HWVoiceOut *hw = sw->hw;
1917
1918 sw->vol.mute = vol->mute;
1919 sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
1920 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] /
1921 255;
1922
1923 if (hw->pcm_ops->volume_out) {
1924 hw->pcm_ops->volume_out(hw, vol);
1925 }
1926 }
1927 }
1928
1929 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1930 {
1931 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1932 audio_set_volume_in(sw, &vol);
1933 }
1934
1935 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol)
1936 {
1937 if (sw) {
1938 HWVoiceIn *hw = sw->hw;
1939
1940 sw->vol.mute = vol->mute;
1941 sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
1942 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] /
1943 255;
1944
1945 if (hw->pcm_ops->volume_in) {
1946 hw->pcm_ops->volume_in(hw, vol);
1947 }
1948 }
1949 }
1950
1951 void audio_create_pdos(Audiodev *dev)
1952 {
1953 switch (dev->driver) {
1954 #define CASE(DRIVER, driver, pdo_name) \
1955 case AUDIODEV_DRIVER_##DRIVER: \
1956 if (!dev->u.driver.has_in) { \
1957 dev->u.driver.in = g_malloc0( \
1958 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1959 dev->u.driver.has_in = true; \
1960 } \
1961 if (!dev->u.driver.has_out) { \
1962 dev->u.driver.out = g_malloc0( \
1963 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1964 dev->u.driver.has_out = true; \
1965 } \
1966 break
1967
1968 CASE(NONE, none, );
1969 CASE(ALSA, alsa, Alsa);
1970 CASE(COREAUDIO, coreaudio, Coreaudio);
1971 CASE(DSOUND, dsound, );
1972 CASE(JACK, jack, Jack);
1973 CASE(OSS, oss, Oss);
1974 CASE(PA, pa, Pa);
1975 CASE(SDL, sdl, );
1976 CASE(SPICE, spice, );
1977 CASE(WAV, wav, );
1978
1979 case AUDIODEV_DRIVER__MAX:
1980 abort();
1981 };
1982 }
1983
1984 static void audio_validate_per_direction_opts(
1985 AudiodevPerDirectionOptions *pdo, Error **errp)
1986 {
1987 if (!pdo->has_mixing_engine) {
1988 pdo->has_mixing_engine = true;
1989 pdo->mixing_engine = true;
1990 }
1991 if (!pdo->has_fixed_settings) {
1992 pdo->has_fixed_settings = true;
1993 pdo->fixed_settings = pdo->mixing_engine;
1994 }
1995 if (!pdo->fixed_settings &&
1996 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) {
1997 error_setg(errp,
1998 "You can't use frequency, channels or format with fixed-settings=off");
1999 return;
2000 }
2001 if (!pdo->mixing_engine && pdo->fixed_settings) {
2002 error_setg(errp, "You can't use fixed-settings without mixeng");
2003 return;
2004 }
2005
2006 if (!pdo->has_frequency) {
2007 pdo->has_frequency = true;
2008 pdo->frequency = 44100;
2009 }
2010 if (!pdo->has_channels) {
2011 pdo->has_channels = true;
2012 pdo->channels = 2;
2013 }
2014 if (!pdo->has_voices) {
2015 pdo->has_voices = true;
2016 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX;
2017 }
2018 if (!pdo->has_format) {
2019 pdo->has_format = true;
2020 pdo->format = AUDIO_FORMAT_S16;
2021 }
2022 }
2023
2024 static void audio_validate_opts(Audiodev *dev, Error **errp)
2025 {
2026 Error *err = NULL;
2027
2028 audio_create_pdos(dev);
2029
2030 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err);
2031 if (err) {
2032 error_propagate(errp, err);
2033 return;
2034 }
2035
2036 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err);
2037 if (err) {
2038 error_propagate(errp, err);
2039 return;
2040 }
2041
2042 if (!dev->has_timer_period) {
2043 dev->has_timer_period = true;
2044 dev->timer_period = 10000; /* 100Hz -> 10ms */
2045 }
2046 }
2047
2048 void audio_parse_option(const char *opt)
2049 {
2050 AudiodevListEntry *e;
2051 Audiodev *dev = NULL;
2052
2053 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal);
2054 visit_type_Audiodev(v, NULL, &dev, &error_fatal);
2055 visit_free(v);
2056
2057 audio_validate_opts(dev, &error_fatal);
2058
2059 e = g_malloc0(sizeof(AudiodevListEntry));
2060 e->dev = dev;
2061 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next);
2062 }
2063
2064 void audio_init_audiodevs(void)
2065 {
2066 AudiodevListEntry *e;
2067
2068 QSIMPLEQ_FOREACH(e, &audiodevs, next) {
2069 audio_init(e->dev, NULL);
2070 }
2071 }
2072
2073 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo)
2074 {
2075 return (audsettings) {
2076 .freq = pdo->frequency,
2077 .nchannels = pdo->channels,
2078 .fmt = pdo->format,
2079 .endianness = AUDIO_HOST_ENDIANNESS,
2080 };
2081 }
2082
2083 int audioformat_bytes_per_sample(AudioFormat fmt)
2084 {
2085 switch (fmt) {
2086 case AUDIO_FORMAT_U8:
2087 case AUDIO_FORMAT_S8:
2088 return 1;
2089
2090 case AUDIO_FORMAT_U16:
2091 case AUDIO_FORMAT_S16:
2092 return 2;
2093
2094 case AUDIO_FORMAT_U32:
2095 case AUDIO_FORMAT_S32:
2096 case AUDIO_FORMAT_F32:
2097 return 4;
2098
2099 case AUDIO_FORMAT__MAX:
2100 ;
2101 }
2102 abort();
2103 }
2104
2105
2106 /* frames = freq * usec / 1e6 */
2107 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo,
2108 audsettings *as, int def_usecs)
2109 {
2110 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs;
2111 return (as->freq * usecs + 500000) / 1000000;
2112 }
2113
2114 /* samples = channels * frames = channels * freq * usec / 1e6 */
2115 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo,
2116 audsettings *as, int def_usecs)
2117 {
2118 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs);
2119 }
2120
2121 /*
2122 * bytes = bytes_per_sample * samples =
2123 * bytes_per_sample * channels * freq * usec / 1e6
2124 */
2125 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo,
2126 audsettings *as, int def_usecs)
2127 {
2128 return audio_buffer_samples(pdo, as, def_usecs) *
2129 audioformat_bytes_per_sample(as->fmt);
2130 }
2131
2132 AudioState *audio_state_by_name(const char *name)
2133 {
2134 AudioState *s;
2135 QTAILQ_FOREACH(s, &audio_states, list) {
2136 assert(s->dev);
2137 if (strcmp(name, s->dev->id) == 0) {
2138 return s;
2139 }
2140 }
2141 return NULL;
2142 }
2143
2144 const char *audio_get_id(QEMUSoundCard *card)
2145 {
2146 if (card->state) {
2147 assert(card->state->dev);
2148 return card->state->dev->id;
2149 } else {
2150 return "";
2151 }
2152 }
2153
2154 void audio_rate_start(RateCtl *rate)
2155 {
2156 memset(rate, 0, sizeof(RateCtl));
2157 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2158 }
2159
2160 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate,
2161 size_t bytes_avail)
2162 {
2163 int64_t now;
2164 int64_t ticks;
2165 int64_t bytes;
2166 int64_t samples;
2167 size_t ret;
2168
2169 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2170 ticks = now - rate->start_ticks;
2171 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
2172 samples = (bytes - rate->bytes_sent) / info->bytes_per_frame;
2173 if (samples < 0 || samples > 65536) {
2174 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples);
2175 audio_rate_start(rate);
2176 samples = 0;
2177 }
2178
2179 ret = MIN(samples * info->bytes_per_frame, bytes_avail);
2180 rate->bytes_sent += ret;
2181 return ret;
2182 }