audio/spiceaudio: always rate limit playback stream
[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 = live * hw->info.bytes_per_frame;
1093 size_t decr, proc;
1094 void *buf = hw->pcm_ops->get_buffer_out(hw, &size);
1095
1096 if (size == 0) {
1097 break;
1098 }
1099
1100 decr = MIN(size / hw->info.bytes_per_frame, live);
1101 if (buf) {
1102 audio_pcm_hw_clip_out(hw, buf, decr);
1103 }
1104 proc = hw->pcm_ops->put_buffer_out(hw, buf,
1105 decr * hw->info.bytes_per_frame) /
1106 hw->info.bytes_per_frame;
1107
1108 live -= proc;
1109 clipped += proc;
1110 hw->mix_buf->pos = (hw->mix_buf->pos + proc) % hw->mix_buf->size;
1111
1112 if (proc == 0 || proc < decr) {
1113 break;
1114 }
1115 }
1116
1117 if (hw->pcm_ops->run_buffer_out) {
1118 hw->pcm_ops->run_buffer_out(hw);
1119 }
1120
1121 return clipped;
1122 }
1123
1124 static void audio_run_out (AudioState *s)
1125 {
1126 HWVoiceOut *hw = NULL;
1127 SWVoiceOut *sw;
1128
1129 if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1130 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1131 /* there is exactly 1 sw for each hw with no mixeng */
1132 sw = hw->sw_head.lh_first;
1133
1134 if (hw->pending_disable) {
1135 hw->enabled = 0;
1136 hw->pending_disable = 0;
1137 if (hw->pcm_ops->enable_out) {
1138 hw->pcm_ops->enable_out(hw, false);
1139 }
1140 }
1141
1142 if (sw->active) {
1143 sw->callback.fn(sw->callback.opaque, INT_MAX);
1144 }
1145 }
1146 return;
1147 }
1148
1149 while ((hw = audio_pcm_hw_find_any_enabled_out(s, hw))) {
1150 size_t played, live, prev_rpos, free;
1151 int nb_live, cleanup_required;
1152
1153 live = audio_pcm_hw_get_live_out (hw, &nb_live);
1154 if (!nb_live) {
1155 live = 0;
1156 }
1157
1158 if (audio_bug(__func__, live > hw->mix_buf->size)) {
1159 dolog("live=%zu hw->mix_buf->size=%zu\n", live, hw->mix_buf->size);
1160 continue;
1161 }
1162
1163 if (hw->pending_disable && !nb_live) {
1164 SWVoiceCap *sc;
1165 #ifdef DEBUG_OUT
1166 dolog ("Disabling voice\n");
1167 #endif
1168 hw->enabled = 0;
1169 hw->pending_disable = 0;
1170 if (hw->pcm_ops->enable_out) {
1171 hw->pcm_ops->enable_out(hw, false);
1172 }
1173 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1174 sc->sw.active = 0;
1175 audio_recalc_and_notify_capture (sc->cap);
1176 }
1177 continue;
1178 }
1179
1180 if (!live) {
1181 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1182 if (sw->active) {
1183 free = audio_get_free (sw);
1184 if (free > 0) {
1185 sw->callback.fn (sw->callback.opaque, free);
1186 }
1187 }
1188 }
1189 continue;
1190 }
1191
1192 prev_rpos = hw->mix_buf->pos;
1193 played = audio_pcm_hw_run_out(hw, live);
1194 replay_audio_out(&played);
1195 if (audio_bug(__func__, hw->mix_buf->pos >= hw->mix_buf->size)) {
1196 dolog("hw->mix_buf->pos=%zu hw->mix_buf->size=%zu played=%zu\n",
1197 hw->mix_buf->pos, hw->mix_buf->size, played);
1198 hw->mix_buf->pos = 0;
1199 }
1200
1201 #ifdef DEBUG_OUT
1202 dolog("played=%zu\n", played);
1203 #endif
1204
1205 if (played) {
1206 hw->ts_helper += played;
1207 audio_capture_mix_and_clear (hw, prev_rpos, played);
1208 }
1209
1210 cleanup_required = 0;
1211 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1212 if (!sw->active && sw->empty) {
1213 continue;
1214 }
1215
1216 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1217 dolog("played=%zu sw->total_hw_samples_mixed=%zu\n",
1218 played, sw->total_hw_samples_mixed);
1219 played = sw->total_hw_samples_mixed;
1220 }
1221
1222 sw->total_hw_samples_mixed -= played;
1223
1224 if (!sw->total_hw_samples_mixed) {
1225 sw->empty = 1;
1226 cleanup_required |= !sw->active && !sw->callback.fn;
1227 }
1228
1229 if (sw->active) {
1230 free = audio_get_free (sw);
1231 if (free > 0) {
1232 sw->callback.fn (sw->callback.opaque, free);
1233 }
1234 }
1235 }
1236
1237 if (cleanup_required) {
1238 SWVoiceOut *sw1;
1239
1240 sw = hw->sw_head.lh_first;
1241 while (sw) {
1242 sw1 = sw->entries.le_next;
1243 if (!sw->active && !sw->callback.fn) {
1244 audio_close_out (sw);
1245 }
1246 sw = sw1;
1247 }
1248 }
1249 }
1250 }
1251
1252 static size_t audio_pcm_hw_run_in(HWVoiceIn *hw, size_t samples)
1253 {
1254 size_t conv = 0;
1255 STSampleBuffer *conv_buf = hw->conv_buf;
1256
1257 while (samples) {
1258 size_t proc;
1259 size_t size = samples * hw->info.bytes_per_frame;
1260 void *buf = hw->pcm_ops->get_buffer_in(hw, &size);
1261
1262 assert(size % hw->info.bytes_per_frame == 0);
1263 if (size == 0) {
1264 hw->pcm_ops->put_buffer_in(hw, buf, size);
1265 break;
1266 }
1267
1268 proc = MIN(size / hw->info.bytes_per_frame,
1269 conv_buf->size - conv_buf->pos);
1270
1271 hw->conv(conv_buf->samples + conv_buf->pos, buf, proc);
1272 conv_buf->pos = (conv_buf->pos + proc) % conv_buf->size;
1273
1274 samples -= proc;
1275 conv += proc;
1276 hw->pcm_ops->put_buffer_in(hw, buf, proc * hw->info.bytes_per_frame);
1277 }
1278
1279 return conv;
1280 }
1281
1282 static void audio_run_in (AudioState *s)
1283 {
1284 HWVoiceIn *hw = NULL;
1285
1286 if (!audio_get_pdo_in(s->dev)->mixing_engine) {
1287 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1288 /* there is exactly 1 sw for each hw with no mixeng */
1289 SWVoiceIn *sw = hw->sw_head.lh_first;
1290 if (sw->active) {
1291 sw->callback.fn(sw->callback.opaque, INT_MAX);
1292 }
1293 }
1294 return;
1295 }
1296
1297 while ((hw = audio_pcm_hw_find_any_enabled_in(s, hw))) {
1298 SWVoiceIn *sw;
1299 size_t captured = 0, min;
1300
1301 if (replay_mode != REPLAY_MODE_PLAY) {
1302 captured = audio_pcm_hw_run_in(
1303 hw, hw->conv_buf->size - audio_pcm_hw_get_live_in(hw));
1304 }
1305 replay_audio_in(&captured, hw->conv_buf->samples, &hw->conv_buf->pos,
1306 hw->conv_buf->size);
1307
1308 min = audio_pcm_hw_find_min_in (hw);
1309 hw->total_samples_captured += captured - min;
1310 hw->ts_helper += captured;
1311
1312 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1313 sw->total_hw_samples_acquired -= min;
1314
1315 if (sw->active) {
1316 size_t avail;
1317
1318 avail = audio_get_avail (sw);
1319 if (avail > 0) {
1320 sw->callback.fn (sw->callback.opaque, avail);
1321 }
1322 }
1323 }
1324 }
1325 }
1326
1327 static void audio_run_capture (AudioState *s)
1328 {
1329 CaptureVoiceOut *cap;
1330
1331 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1332 size_t live, rpos, captured;
1333 HWVoiceOut *hw = &cap->hw;
1334 SWVoiceOut *sw;
1335
1336 captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1337 rpos = hw->mix_buf->pos;
1338 while (live) {
1339 size_t left = hw->mix_buf->size - rpos;
1340 size_t to_capture = MIN(live, left);
1341 struct st_sample *src;
1342 struct capture_callback *cb;
1343
1344 src = hw->mix_buf->samples + rpos;
1345 hw->clip (cap->buf, src, to_capture);
1346 mixeng_clear (src, to_capture);
1347
1348 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1349 cb->ops.capture (cb->opaque, cap->buf,
1350 to_capture * hw->info.bytes_per_frame);
1351 }
1352 rpos = (rpos + to_capture) % hw->mix_buf->size;
1353 live -= to_capture;
1354 }
1355 hw->mix_buf->pos = rpos;
1356
1357 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1358 if (!sw->active && sw->empty) {
1359 continue;
1360 }
1361
1362 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1363 dolog("captured=%zu sw->total_hw_samples_mixed=%zu\n",
1364 captured, sw->total_hw_samples_mixed);
1365 captured = sw->total_hw_samples_mixed;
1366 }
1367
1368 sw->total_hw_samples_mixed -= captured;
1369 sw->empty = sw->total_hw_samples_mixed == 0;
1370 }
1371 }
1372 }
1373
1374 void audio_run(AudioState *s, const char *msg)
1375 {
1376 audio_run_out(s);
1377 audio_run_in(s);
1378 audio_run_capture(s);
1379
1380 #ifdef DEBUG_POLL
1381 {
1382 static double prevtime;
1383 double currtime;
1384 struct timeval tv;
1385
1386 if (gettimeofday (&tv, NULL)) {
1387 perror ("audio_run: gettimeofday");
1388 return;
1389 }
1390
1391 currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1392 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1393 prevtime = currtime;
1394 }
1395 #endif
1396 }
1397
1398 void *audio_generic_get_buffer_in(HWVoiceIn *hw, size_t *size)
1399 {
1400 ssize_t start;
1401
1402 if (unlikely(!hw->buf_emul)) {
1403 size_t calc_size = hw->conv_buf->size * hw->info.bytes_per_frame;
1404 hw->buf_emul = g_malloc(calc_size);
1405 hw->size_emul = calc_size;
1406 hw->pos_emul = hw->pending_emul = 0;
1407 }
1408
1409 while (hw->pending_emul < hw->size_emul) {
1410 size_t read_len = MIN(hw->size_emul - hw->pos_emul,
1411 hw->size_emul - hw->pending_emul);
1412 size_t read = hw->pcm_ops->read(hw, hw->buf_emul + hw->pos_emul,
1413 read_len);
1414 hw->pending_emul += read;
1415 hw->pos_emul = (hw->pos_emul + read) % hw->size_emul;
1416 if (read < read_len) {
1417 break;
1418 }
1419 }
1420
1421 start = ((ssize_t) hw->pos_emul) - hw->pending_emul;
1422 if (start < 0) {
1423 start += hw->size_emul;
1424 }
1425 assert(start >= 0 && start < hw->size_emul);
1426
1427 *size = MIN(*size, hw->pending_emul);
1428 *size = MIN(*size, hw->size_emul - start);
1429 return hw->buf_emul + start;
1430 }
1431
1432 void audio_generic_put_buffer_in(HWVoiceIn *hw, void *buf, size_t size)
1433 {
1434 assert(size <= hw->pending_emul);
1435 hw->pending_emul -= size;
1436 }
1437
1438 void audio_generic_run_buffer_out(HWVoiceOut *hw)
1439 {
1440 while (hw->pending_emul) {
1441 size_t write_len, written;
1442 ssize_t start = ((ssize_t) hw->pos_emul) - hw->pending_emul;
1443
1444 if (start < 0) {
1445 start += hw->size_emul;
1446 }
1447 assert(start >= 0 && start < hw->size_emul);
1448
1449 write_len = MIN(hw->pending_emul, hw->size_emul - start);
1450
1451 written = hw->pcm_ops->write(hw, hw->buf_emul + start, write_len);
1452 hw->pending_emul -= written;
1453
1454 if (written < write_len) {
1455 break;
1456 }
1457 }
1458 }
1459
1460 void *audio_generic_get_buffer_out(HWVoiceOut *hw, size_t *size)
1461 {
1462 if (unlikely(!hw->buf_emul)) {
1463 size_t calc_size = hw->mix_buf->size * hw->info.bytes_per_frame;
1464
1465 hw->buf_emul = g_malloc(calc_size);
1466 hw->size_emul = calc_size;
1467 hw->pos_emul = hw->pending_emul = 0;
1468 }
1469
1470 *size = MIN(hw->size_emul - hw->pending_emul,
1471 hw->size_emul - hw->pos_emul);
1472 return hw->buf_emul + hw->pos_emul;
1473 }
1474
1475 size_t audio_generic_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
1476 {
1477 assert(buf == hw->buf_emul + hw->pos_emul &&
1478 size + hw->pending_emul <= hw->size_emul);
1479
1480 hw->pending_emul += size;
1481 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
1482
1483 return size;
1484 }
1485
1486 size_t audio_generic_write(HWVoiceOut *hw, void *buf, size_t size)
1487 {
1488 size_t dst_size, copy_size;
1489 void *dst = hw->pcm_ops->get_buffer_out(hw, &dst_size);
1490 copy_size = MIN(size, dst_size);
1491
1492 memcpy(dst, buf, copy_size);
1493 return hw->pcm_ops->put_buffer_out(hw, dst, copy_size);
1494 }
1495
1496 size_t audio_generic_read(HWVoiceIn *hw, void *buf, size_t size)
1497 {
1498 void *src = hw->pcm_ops->get_buffer_in(hw, &size);
1499
1500 memcpy(buf, src, size);
1501 hw->pcm_ops->put_buffer_in(hw, src, size);
1502
1503 return size;
1504 }
1505
1506 static int audio_driver_init(AudioState *s, struct audio_driver *drv,
1507 bool msg, Audiodev *dev)
1508 {
1509 s->drv_opaque = drv->init(dev);
1510
1511 if (s->drv_opaque) {
1512 if (!drv->pcm_ops->get_buffer_in) {
1513 drv->pcm_ops->get_buffer_in = audio_generic_get_buffer_in;
1514 drv->pcm_ops->put_buffer_in = audio_generic_put_buffer_in;
1515 }
1516 if (!drv->pcm_ops->get_buffer_out) {
1517 drv->pcm_ops->get_buffer_out = audio_generic_get_buffer_out;
1518 drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out;
1519 }
1520
1521 audio_init_nb_voices_out(s, drv);
1522 audio_init_nb_voices_in(s, drv);
1523 s->drv = drv;
1524 return 0;
1525 }
1526 else {
1527 if (msg) {
1528 dolog("Could not init `%s' audio driver\n", drv->name);
1529 }
1530 return -1;
1531 }
1532 }
1533
1534 static void audio_vm_change_state_handler (void *opaque, int running,
1535 RunState state)
1536 {
1537 AudioState *s = opaque;
1538 HWVoiceOut *hwo = NULL;
1539 HWVoiceIn *hwi = NULL;
1540
1541 s->vm_running = running;
1542 while ((hwo = audio_pcm_hw_find_any_enabled_out(s, hwo))) {
1543 if (hwo->pcm_ops->enable_out) {
1544 hwo->pcm_ops->enable_out(hwo, running);
1545 }
1546 }
1547
1548 while ((hwi = audio_pcm_hw_find_any_enabled_in(s, hwi))) {
1549 if (hwi->pcm_ops->enable_in) {
1550 hwi->pcm_ops->enable_in(hwi, running);
1551 }
1552 }
1553 audio_reset_timer (s);
1554 }
1555
1556 static bool is_cleaning_up;
1557
1558 bool audio_is_cleaning_up(void)
1559 {
1560 return is_cleaning_up;
1561 }
1562
1563 static void free_audio_state(AudioState *s)
1564 {
1565 HWVoiceOut *hwo, *hwon;
1566 HWVoiceIn *hwi, *hwin;
1567
1568 QLIST_FOREACH_SAFE(hwo, &s->hw_head_out, entries, hwon) {
1569 SWVoiceCap *sc;
1570
1571 if (hwo->enabled && hwo->pcm_ops->enable_out) {
1572 hwo->pcm_ops->enable_out(hwo, false);
1573 }
1574 hwo->pcm_ops->fini_out (hwo);
1575
1576 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1577 CaptureVoiceOut *cap = sc->cap;
1578 struct capture_callback *cb;
1579
1580 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1581 cb->ops.destroy (cb->opaque);
1582 }
1583 }
1584 QLIST_REMOVE(hwo, entries);
1585 }
1586
1587 QLIST_FOREACH_SAFE(hwi, &s->hw_head_in, entries, hwin) {
1588 if (hwi->enabled && hwi->pcm_ops->enable_in) {
1589 hwi->pcm_ops->enable_in(hwi, false);
1590 }
1591 hwi->pcm_ops->fini_in (hwi);
1592 QLIST_REMOVE(hwi, entries);
1593 }
1594
1595 if (s->drv) {
1596 s->drv->fini (s->drv_opaque);
1597 s->drv = NULL;
1598 }
1599
1600 if (s->dev) {
1601 qapi_free_Audiodev(s->dev);
1602 s->dev = NULL;
1603 }
1604
1605 if (s->ts) {
1606 timer_free(s->ts);
1607 s->ts = NULL;
1608 }
1609
1610 g_free(s);
1611 }
1612
1613 void audio_cleanup(void)
1614 {
1615 is_cleaning_up = true;
1616 while (!QTAILQ_EMPTY(&audio_states)) {
1617 AudioState *s = QTAILQ_FIRST(&audio_states);
1618 QTAILQ_REMOVE(&audio_states, s, list);
1619 free_audio_state(s);
1620 }
1621 }
1622
1623 static const VMStateDescription vmstate_audio = {
1624 .name = "audio",
1625 .version_id = 1,
1626 .minimum_version_id = 1,
1627 .fields = (VMStateField[]) {
1628 VMSTATE_END_OF_LIST()
1629 }
1630 };
1631
1632 static void audio_validate_opts(Audiodev *dev, Error **errp);
1633
1634 static AudiodevListEntry *audiodev_find(
1635 AudiodevListHead *head, const char *drvname)
1636 {
1637 AudiodevListEntry *e;
1638 QSIMPLEQ_FOREACH(e, head, next) {
1639 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) {
1640 return e;
1641 }
1642 }
1643
1644 return NULL;
1645 }
1646
1647 /*
1648 * if we have dev, this function was called because of an -audiodev argument =>
1649 * initialize a new state with it
1650 * if dev == NULL => legacy implicit initialization, return the already created
1651 * state or create a new one
1652 */
1653 static AudioState *audio_init(Audiodev *dev, const char *name)
1654 {
1655 static bool atexit_registered;
1656 size_t i;
1657 int done = 0;
1658 const char *drvname = NULL;
1659 VMChangeStateEntry *e;
1660 AudioState *s;
1661 struct audio_driver *driver;
1662 /* silence gcc warning about uninitialized variable */
1663 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
1664
1665 if (dev) {
1666 /* -audiodev option */
1667 legacy_config = false;
1668 drvname = AudiodevDriver_str(dev->driver);
1669 } else if (!QTAILQ_EMPTY(&audio_states)) {
1670 if (!legacy_config) {
1671 dolog("Device %s: audiodev default parameter is deprecated, please "
1672 "specify audiodev=%s\n", name,
1673 QTAILQ_FIRST(&audio_states)->dev->id);
1674 }
1675 return QTAILQ_FIRST(&audio_states);
1676 } else {
1677 /* legacy implicit initialization */
1678 head = audio_handle_legacy_opts();
1679 /*
1680 * In case of legacy initialization, all Audiodevs in the list will have
1681 * the same configuration (except the driver), so it doesn't matter which
1682 * one we chose. We need an Audiodev to set up AudioState before we can
1683 * init a driver. Also note that dev at this point is still in the
1684 * list.
1685 */
1686 dev = QSIMPLEQ_FIRST(&head)->dev;
1687 audio_validate_opts(dev, &error_abort);
1688 }
1689
1690 s = g_malloc0(sizeof(AudioState));
1691 s->dev = dev;
1692
1693 QLIST_INIT (&s->hw_head_out);
1694 QLIST_INIT (&s->hw_head_in);
1695 QLIST_INIT (&s->cap_head);
1696 if (!atexit_registered) {
1697 atexit(audio_cleanup);
1698 atexit_registered = true;
1699 }
1700 QTAILQ_INSERT_TAIL(&audio_states, s, list);
1701
1702 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1703
1704 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
1705 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
1706
1707 if (s->nb_hw_voices_out <= 0) {
1708 dolog ("Bogus number of playback voices %d, setting to 1\n",
1709 s->nb_hw_voices_out);
1710 s->nb_hw_voices_out = 1;
1711 }
1712
1713 if (s->nb_hw_voices_in <= 0) {
1714 dolog ("Bogus number of capture voices %d, setting to 0\n",
1715 s->nb_hw_voices_in);
1716 s->nb_hw_voices_in = 0;
1717 }
1718
1719 if (drvname) {
1720 driver = audio_driver_lookup(drvname);
1721 if (driver) {
1722 done = !audio_driver_init(s, driver, true, dev);
1723 } else {
1724 dolog ("Unknown audio driver `%s'\n", drvname);
1725 }
1726 } else {
1727 for (i = 0; audio_prio_list[i]; i++) {
1728 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]);
1729 driver = audio_driver_lookup(audio_prio_list[i]);
1730
1731 if (e && driver) {
1732 s->dev = dev = e->dev;
1733 audio_validate_opts(dev, &error_abort);
1734 done = !audio_driver_init(s, driver, false, dev);
1735 if (done) {
1736 e->dev = NULL;
1737 break;
1738 }
1739 }
1740 }
1741 }
1742 audio_free_audiodev_list(&head);
1743
1744 if (!done) {
1745 driver = audio_driver_lookup("none");
1746 done = !audio_driver_init(s, driver, false, dev);
1747 assert(done);
1748 dolog("warning: Using timer based audio emulation\n");
1749 }
1750
1751 if (dev->timer_period <= 0) {
1752 s->period_ticks = 1;
1753 } else {
1754 s->period_ticks = dev->timer_period * (int64_t)SCALE_US;
1755 }
1756
1757 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1758 if (!e) {
1759 dolog ("warning: Could not register change state handler\n"
1760 "(Audio can continue looping even after stopping the VM)\n");
1761 }
1762
1763 QLIST_INIT (&s->card_head);
1764 vmstate_register (NULL, 0, &vmstate_audio, s);
1765 return s;
1766 }
1767
1768 void audio_free_audiodev_list(AudiodevListHead *head)
1769 {
1770 AudiodevListEntry *e;
1771 while ((e = QSIMPLEQ_FIRST(head))) {
1772 QSIMPLEQ_REMOVE_HEAD(head, next);
1773 qapi_free_Audiodev(e->dev);
1774 g_free(e);
1775 }
1776 }
1777
1778 void AUD_register_card (const char *name, QEMUSoundCard *card)
1779 {
1780 if (!card->state) {
1781 card->state = audio_init(NULL, name);
1782 }
1783
1784 card->name = g_strdup (name);
1785 memset (&card->entries, 0, sizeof (card->entries));
1786 QLIST_INSERT_HEAD(&card->state->card_head, card, entries);
1787 }
1788
1789 void AUD_remove_card (QEMUSoundCard *card)
1790 {
1791 QLIST_REMOVE (card, entries);
1792 g_free (card->name);
1793 }
1794
1795
1796 CaptureVoiceOut *AUD_add_capture(
1797 AudioState *s,
1798 struct audsettings *as,
1799 struct audio_capture_ops *ops,
1800 void *cb_opaque
1801 )
1802 {
1803 CaptureVoiceOut *cap;
1804 struct capture_callback *cb;
1805
1806 if (!s) {
1807 if (!legacy_config) {
1808 dolog("Capturing without setting an audiodev is deprecated\n");
1809 }
1810 s = audio_init(NULL, NULL);
1811 }
1812
1813 if (!audio_get_pdo_out(s->dev)->mixing_engine) {
1814 dolog("Can't capture with mixeng disabled\n");
1815 return NULL;
1816 }
1817
1818 if (audio_validate_settings (as)) {
1819 dolog ("Invalid settings were passed when trying to add capture\n");
1820 audio_print_settings (as);
1821 return NULL;
1822 }
1823
1824 cb = g_malloc0(sizeof(*cb));
1825 cb->ops = *ops;
1826 cb->opaque = cb_opaque;
1827
1828 cap = audio_pcm_capture_find_specific(s, as);
1829 if (cap) {
1830 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1831 return cap;
1832 }
1833 else {
1834 HWVoiceOut *hw;
1835 CaptureVoiceOut *cap;
1836
1837 cap = g_malloc0(sizeof(*cap));
1838
1839 hw = &cap->hw;
1840 hw->s = s;
1841 QLIST_INIT (&hw->sw_head);
1842 QLIST_INIT (&cap->cb_head);
1843
1844 /* XXX find a more elegant way */
1845 hw->samples = 4096 * 4;
1846 audio_pcm_hw_alloc_resources_out(hw);
1847
1848 audio_pcm_init_info (&hw->info, as);
1849
1850 cap->buf = g_malloc0_n(hw->mix_buf->size, hw->info.bytes_per_frame);
1851
1852 if (hw->info.is_float) {
1853 hw->clip = mixeng_clip_float[hw->info.nchannels == 2];
1854 } else {
1855 hw->clip = mixeng_clip
1856 [hw->info.nchannels == 2]
1857 [hw->info.is_signed]
1858 [hw->info.swap_endianness]
1859 [audio_bits_to_index(hw->info.bits)];
1860 }
1861
1862 QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1863 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1864
1865 QLIST_FOREACH(hw, &s->hw_head_out, entries) {
1866 audio_attach_capture (hw);
1867 }
1868 return cap;
1869 }
1870 }
1871
1872 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1873 {
1874 struct capture_callback *cb;
1875
1876 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1877 if (cb->opaque == cb_opaque) {
1878 cb->ops.destroy (cb_opaque);
1879 QLIST_REMOVE (cb, entries);
1880 g_free (cb);
1881
1882 if (!cap->cb_head.lh_first) {
1883 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1884
1885 while (sw) {
1886 SWVoiceCap *sc = (SWVoiceCap *) sw;
1887 #ifdef DEBUG_CAPTURE
1888 dolog ("freeing %s\n", sw->name);
1889 #endif
1890
1891 sw1 = sw->entries.le_next;
1892 if (sw->rate) {
1893 st_rate_stop (sw->rate);
1894 sw->rate = NULL;
1895 }
1896 QLIST_REMOVE (sw, entries);
1897 QLIST_REMOVE (sc, entries);
1898 g_free (sc);
1899 sw = sw1;
1900 }
1901 QLIST_REMOVE (cap, entries);
1902 g_free (cap->hw.mix_buf);
1903 g_free (cap->buf);
1904 g_free (cap);
1905 }
1906 return;
1907 }
1908 }
1909 }
1910
1911 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1912 {
1913 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1914 audio_set_volume_out(sw, &vol);
1915 }
1916
1917 void audio_set_volume_out(SWVoiceOut *sw, Volume *vol)
1918 {
1919 if (sw) {
1920 HWVoiceOut *hw = sw->hw;
1921
1922 sw->vol.mute = vol->mute;
1923 sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
1924 sw->vol.r = nominal_volume.l * vol->vol[vol->channels > 1 ? 1 : 0] /
1925 255;
1926
1927 if (hw->pcm_ops->volume_out) {
1928 hw->pcm_ops->volume_out(hw, vol);
1929 }
1930 }
1931 }
1932
1933 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1934 {
1935 Volume vol = { .mute = mute, .channels = 2, .vol = { lvol, rvol } };
1936 audio_set_volume_in(sw, &vol);
1937 }
1938
1939 void audio_set_volume_in(SWVoiceIn *sw, Volume *vol)
1940 {
1941 if (sw) {
1942 HWVoiceIn *hw = sw->hw;
1943
1944 sw->vol.mute = vol->mute;
1945 sw->vol.l = nominal_volume.l * vol->vol[0] / 255;
1946 sw->vol.r = nominal_volume.r * vol->vol[vol->channels > 1 ? 1 : 0] /
1947 255;
1948
1949 if (hw->pcm_ops->volume_in) {
1950 hw->pcm_ops->volume_in(hw, vol);
1951 }
1952 }
1953 }
1954
1955 void audio_create_pdos(Audiodev *dev)
1956 {
1957 switch (dev->driver) {
1958 #define CASE(DRIVER, driver, pdo_name) \
1959 case AUDIODEV_DRIVER_##DRIVER: \
1960 if (!dev->u.driver.has_in) { \
1961 dev->u.driver.in = g_malloc0( \
1962 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1963 dev->u.driver.has_in = true; \
1964 } \
1965 if (!dev->u.driver.has_out) { \
1966 dev->u.driver.out = g_malloc0( \
1967 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1968 dev->u.driver.has_out = true; \
1969 } \
1970 break
1971
1972 CASE(NONE, none, );
1973 CASE(ALSA, alsa, Alsa);
1974 CASE(COREAUDIO, coreaudio, Coreaudio);
1975 CASE(DSOUND, dsound, );
1976 CASE(JACK, jack, Jack);
1977 CASE(OSS, oss, Oss);
1978 CASE(PA, pa, Pa);
1979 CASE(SDL, sdl, );
1980 CASE(SPICE, spice, );
1981 CASE(WAV, wav, );
1982
1983 case AUDIODEV_DRIVER__MAX:
1984 abort();
1985 };
1986 }
1987
1988 static void audio_validate_per_direction_opts(
1989 AudiodevPerDirectionOptions *pdo, Error **errp)
1990 {
1991 if (!pdo->has_mixing_engine) {
1992 pdo->has_mixing_engine = true;
1993 pdo->mixing_engine = true;
1994 }
1995 if (!pdo->has_fixed_settings) {
1996 pdo->has_fixed_settings = true;
1997 pdo->fixed_settings = pdo->mixing_engine;
1998 }
1999 if (!pdo->fixed_settings &&
2000 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) {
2001 error_setg(errp,
2002 "You can't use frequency, channels or format with fixed-settings=off");
2003 return;
2004 }
2005 if (!pdo->mixing_engine && pdo->fixed_settings) {
2006 error_setg(errp, "You can't use fixed-settings without mixeng");
2007 return;
2008 }
2009
2010 if (!pdo->has_frequency) {
2011 pdo->has_frequency = true;
2012 pdo->frequency = 44100;
2013 }
2014 if (!pdo->has_channels) {
2015 pdo->has_channels = true;
2016 pdo->channels = 2;
2017 }
2018 if (!pdo->has_voices) {
2019 pdo->has_voices = true;
2020 pdo->voices = pdo->mixing_engine ? 1 : INT_MAX;
2021 }
2022 if (!pdo->has_format) {
2023 pdo->has_format = true;
2024 pdo->format = AUDIO_FORMAT_S16;
2025 }
2026 }
2027
2028 static void audio_validate_opts(Audiodev *dev, Error **errp)
2029 {
2030 Error *err = NULL;
2031
2032 audio_create_pdos(dev);
2033
2034 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err);
2035 if (err) {
2036 error_propagate(errp, err);
2037 return;
2038 }
2039
2040 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err);
2041 if (err) {
2042 error_propagate(errp, err);
2043 return;
2044 }
2045
2046 if (!dev->has_timer_period) {
2047 dev->has_timer_period = true;
2048 dev->timer_period = 10000; /* 100Hz -> 10ms */
2049 }
2050 }
2051
2052 void audio_parse_option(const char *opt)
2053 {
2054 AudiodevListEntry *e;
2055 Audiodev *dev = NULL;
2056
2057 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal);
2058 visit_type_Audiodev(v, NULL, &dev, &error_fatal);
2059 visit_free(v);
2060
2061 audio_validate_opts(dev, &error_fatal);
2062
2063 e = g_malloc0(sizeof(AudiodevListEntry));
2064 e->dev = dev;
2065 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next);
2066 }
2067
2068 void audio_init_audiodevs(void)
2069 {
2070 AudiodevListEntry *e;
2071
2072 QSIMPLEQ_FOREACH(e, &audiodevs, next) {
2073 audio_init(e->dev, NULL);
2074 }
2075 }
2076
2077 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo)
2078 {
2079 return (audsettings) {
2080 .freq = pdo->frequency,
2081 .nchannels = pdo->channels,
2082 .fmt = pdo->format,
2083 .endianness = AUDIO_HOST_ENDIANNESS,
2084 };
2085 }
2086
2087 int audioformat_bytes_per_sample(AudioFormat fmt)
2088 {
2089 switch (fmt) {
2090 case AUDIO_FORMAT_U8:
2091 case AUDIO_FORMAT_S8:
2092 return 1;
2093
2094 case AUDIO_FORMAT_U16:
2095 case AUDIO_FORMAT_S16:
2096 return 2;
2097
2098 case AUDIO_FORMAT_U32:
2099 case AUDIO_FORMAT_S32:
2100 case AUDIO_FORMAT_F32:
2101 return 4;
2102
2103 case AUDIO_FORMAT__MAX:
2104 ;
2105 }
2106 abort();
2107 }
2108
2109
2110 /* frames = freq * usec / 1e6 */
2111 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo,
2112 audsettings *as, int def_usecs)
2113 {
2114 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs;
2115 return (as->freq * usecs + 500000) / 1000000;
2116 }
2117
2118 /* samples = channels * frames = channels * freq * usec / 1e6 */
2119 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo,
2120 audsettings *as, int def_usecs)
2121 {
2122 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs);
2123 }
2124
2125 /*
2126 * bytes = bytes_per_sample * samples =
2127 * bytes_per_sample * channels * freq * usec / 1e6
2128 */
2129 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo,
2130 audsettings *as, int def_usecs)
2131 {
2132 return audio_buffer_samples(pdo, as, def_usecs) *
2133 audioformat_bytes_per_sample(as->fmt);
2134 }
2135
2136 AudioState *audio_state_by_name(const char *name)
2137 {
2138 AudioState *s;
2139 QTAILQ_FOREACH(s, &audio_states, list) {
2140 assert(s->dev);
2141 if (strcmp(name, s->dev->id) == 0) {
2142 return s;
2143 }
2144 }
2145 return NULL;
2146 }
2147
2148 const char *audio_get_id(QEMUSoundCard *card)
2149 {
2150 if (card->state) {
2151 assert(card->state->dev);
2152 return card->state->dev->id;
2153 } else {
2154 return "";
2155 }
2156 }
2157
2158 void audio_rate_start(RateCtl *rate)
2159 {
2160 memset(rate, 0, sizeof(RateCtl));
2161 rate->start_ticks = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2162 }
2163
2164 size_t audio_rate_get_bytes(struct audio_pcm_info *info, RateCtl *rate,
2165 size_t bytes_avail)
2166 {
2167 int64_t now;
2168 int64_t ticks;
2169 int64_t bytes;
2170 int64_t samples;
2171 size_t ret;
2172
2173 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2174 ticks = now - rate->start_ticks;
2175 bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
2176 samples = (bytes - rate->bytes_sent) / info->bytes_per_frame;
2177 if (samples < 0 || samples > 65536) {
2178 AUD_log(NULL, "Resetting rate control (%" PRId64 " samples)\n", samples);
2179 audio_rate_start(rate);
2180 samples = 0;
2181 }
2182
2183 ret = MIN(samples * info->bytes_per_frame, bytes_avail);
2184 rate->bytes_sent += ret;
2185 return ret;
2186 }