monitor: Fix return type of monitor_fdset_dup_fd_find
[qemu/kevin.git] / audio / audio.c
blob05adf7ffebf1de212a40cd5b1c988568d194b3ee
1 /*
2 * QEMU Audio subsystem
4 * Copyright (c) 2003-2005 Vassili Karpov (malc)
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
25 #include "qemu/osdep.h"
26 #include "hw/hw.h"
27 #include "audio.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 "sysemu/sysemu.h"
34 #include "qemu/cutils.h"
35 #include "qemu/module.h"
36 #include "sysemu/replay.h"
37 #include "trace.h"
39 #define AUDIO_CAP "audio"
40 #include "audio_int.h"
42 /* #define DEBUG_LIVE */
43 /* #define DEBUG_OUT */
44 /* #define DEBUG_CAPTURE */
45 /* #define DEBUG_POLL */
47 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
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.
54 const char *audio_prio_list[] = {
55 "spice",
56 CONFIG_AUDIO_DRIVERS
57 "none",
58 "wav",
59 NULL
62 static QLIST_HEAD(, audio_driver) audio_drivers;
63 static AudiodevListHead audiodevs = QSIMPLEQ_HEAD_INITIALIZER(audiodevs);
65 void audio_driver_register(audio_driver *drv)
67 QLIST_INSERT_HEAD(&audio_drivers, drv, next);
70 audio_driver *audio_driver_lookup(const char *name)
72 struct audio_driver *d;
74 QLIST_FOREACH(d, &audio_drivers, next) {
75 if (strcmp(name, d->name) == 0) {
76 return d;
80 audio_module_load_one(name);
81 QLIST_FOREACH(d, &audio_drivers, next) {
82 if (strcmp(name, d->name) == 0) {
83 return d;
87 return NULL;
90 static AudioState glob_audio_state;
92 const struct mixeng_volume nominal_volume = {
93 .mute = 0,
94 #ifdef FLOAT_MIXENG
95 .r = 1.0,
96 .l = 1.0,
97 #else
98 .r = 1ULL << 32,
99 .l = 1ULL << 32,
100 #endif
103 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
104 #error No its not
105 #else
106 int audio_bug (const char *funcname, int cond)
108 if (cond) {
109 static int shown;
111 AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
112 if (!shown) {
113 shown = 1;
114 AUD_log (NULL, "Save all your work and restart without audio\n");
115 AUD_log (NULL, "I am sorry\n");
117 AUD_log (NULL, "Context:\n");
119 #if defined AUDIO_BREAKPOINT_ON_BUG
120 # if defined HOST_I386
121 # if defined __GNUC__
122 __asm__ ("int3");
123 # elif defined _MSC_VER
124 _asm _emit 0xcc;
125 # else
126 abort ();
127 # endif
128 # else
129 abort ();
130 # endif
131 #endif
134 return cond;
136 #endif
138 static inline int audio_bits_to_index (int bits)
140 switch (bits) {
141 case 8:
142 return 0;
144 case 16:
145 return 1;
147 case 32:
148 return 2;
150 default:
151 audio_bug ("bits_to_index", 1);
152 AUD_log (NULL, "invalid bits %d\n", bits);
153 return 0;
157 void *audio_calloc (const char *funcname, int nmemb, size_t size)
159 int cond;
160 size_t len;
162 len = nmemb * size;
163 cond = !nmemb || !size;
164 cond |= nmemb < 0;
165 cond |= len < size;
167 if (audio_bug ("audio_calloc", cond)) {
168 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
169 funcname);
170 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
171 return NULL;
174 return g_malloc0 (len);
177 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
179 if (cap) {
180 fprintf(stderr, "%s: ", cap);
183 vfprintf(stderr, fmt, ap);
186 void AUD_log (const char *cap, const char *fmt, ...)
188 va_list ap;
190 va_start (ap, fmt);
191 AUD_vlog (cap, fmt, ap);
192 va_end (ap);
195 static void audio_print_settings (struct audsettings *as)
197 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
199 switch (as->fmt) {
200 case AUDIO_FORMAT_S8:
201 AUD_log (NULL, "S8");
202 break;
203 case AUDIO_FORMAT_U8:
204 AUD_log (NULL, "U8");
205 break;
206 case AUDIO_FORMAT_S16:
207 AUD_log (NULL, "S16");
208 break;
209 case AUDIO_FORMAT_U16:
210 AUD_log (NULL, "U16");
211 break;
212 case AUDIO_FORMAT_S32:
213 AUD_log (NULL, "S32");
214 break;
215 case AUDIO_FORMAT_U32:
216 AUD_log (NULL, "U32");
217 break;
218 default:
219 AUD_log (NULL, "invalid(%d)", as->fmt);
220 break;
223 AUD_log (NULL, " endianness=");
224 switch (as->endianness) {
225 case 0:
226 AUD_log (NULL, "little");
227 break;
228 case 1:
229 AUD_log (NULL, "big");
230 break;
231 default:
232 AUD_log (NULL, "invalid");
233 break;
235 AUD_log (NULL, "\n");
238 static int audio_validate_settings (struct audsettings *as)
240 int invalid;
242 invalid = as->nchannels != 1 && as->nchannels != 2;
243 invalid |= as->endianness != 0 && as->endianness != 1;
245 switch (as->fmt) {
246 case AUDIO_FORMAT_S8:
247 case AUDIO_FORMAT_U8:
248 case AUDIO_FORMAT_S16:
249 case AUDIO_FORMAT_U16:
250 case AUDIO_FORMAT_S32:
251 case AUDIO_FORMAT_U32:
252 break;
253 default:
254 invalid = 1;
255 break;
258 invalid |= as->freq <= 0;
259 return invalid ? -1 : 0;
262 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
264 int bits = 8, sign = 0;
266 switch (as->fmt) {
267 case AUDIO_FORMAT_S8:
268 sign = 1;
269 /* fall through */
270 case AUDIO_FORMAT_U8:
271 break;
273 case AUDIO_FORMAT_S16:
274 sign = 1;
275 /* fall through */
276 case AUDIO_FORMAT_U16:
277 bits = 16;
278 break;
280 case AUDIO_FORMAT_S32:
281 sign = 1;
282 /* fall through */
283 case AUDIO_FORMAT_U32:
284 bits = 32;
285 break;
287 default:
288 abort();
290 return info->freq == as->freq
291 && info->nchannels == as->nchannels
292 && info->sign == sign
293 && info->bits == bits
294 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
297 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
299 int bits = 8, sign = 0, shift = 0;
301 switch (as->fmt) {
302 case AUDIO_FORMAT_S8:
303 sign = 1;
304 case AUDIO_FORMAT_U8:
305 break;
307 case AUDIO_FORMAT_S16:
308 sign = 1;
309 case AUDIO_FORMAT_U16:
310 bits = 16;
311 shift = 1;
312 break;
314 case AUDIO_FORMAT_S32:
315 sign = 1;
316 case AUDIO_FORMAT_U32:
317 bits = 32;
318 shift = 2;
319 break;
321 default:
322 abort();
325 info->freq = as->freq;
326 info->bits = bits;
327 info->sign = sign;
328 info->nchannels = as->nchannels;
329 info->shift = (as->nchannels == 2) + shift;
330 info->align = (1 << info->shift) - 1;
331 info->bytes_per_second = info->freq << info->shift;
332 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
335 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
337 if (!len) {
338 return;
341 if (info->sign) {
342 memset (buf, 0x00, len << info->shift);
344 else {
345 switch (info->bits) {
346 case 8:
347 memset (buf, 0x80, len << info->shift);
348 break;
350 case 16:
352 int i;
353 uint16_t *p = buf;
354 int shift = info->nchannels - 1;
355 short s = INT16_MAX;
357 if (info->swap_endianness) {
358 s = bswap16 (s);
361 for (i = 0; i < len << shift; i++) {
362 p[i] = s;
365 break;
367 case 32:
369 int i;
370 uint32_t *p = buf;
371 int shift = info->nchannels - 1;
372 int32_t s = INT32_MAX;
374 if (info->swap_endianness) {
375 s = bswap32 (s);
378 for (i = 0; i < len << shift; i++) {
379 p[i] = s;
382 break;
384 default:
385 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
386 info->bits);
387 break;
393 * Capture
395 static void noop_conv (struct st_sample *dst, const void *src, int samples)
397 (void) src;
398 (void) dst;
399 (void) samples;
402 static CaptureVoiceOut *audio_pcm_capture_find_specific (
403 struct audsettings *as
406 CaptureVoiceOut *cap;
407 AudioState *s = &glob_audio_state;
409 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
410 if (audio_pcm_info_eq (&cap->hw.info, as)) {
411 return cap;
414 return NULL;
417 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
419 struct capture_callback *cb;
421 #ifdef DEBUG_CAPTURE
422 dolog ("notification %d sent\n", cmd);
423 #endif
424 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
425 cb->ops.notify (cb->opaque, cmd);
429 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
431 if (cap->hw.enabled != enabled) {
432 audcnotification_e cmd;
433 cap->hw.enabled = enabled;
434 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
435 audio_notify_capture (cap, cmd);
439 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
441 HWVoiceOut *hw = &cap->hw;
442 SWVoiceOut *sw;
443 int enabled = 0;
445 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
446 if (sw->active) {
447 enabled = 1;
448 break;
451 audio_capture_maybe_changed (cap, enabled);
454 static void audio_detach_capture (HWVoiceOut *hw)
456 SWVoiceCap *sc = hw->cap_head.lh_first;
458 while (sc) {
459 SWVoiceCap *sc1 = sc->entries.le_next;
460 SWVoiceOut *sw = &sc->sw;
461 CaptureVoiceOut *cap = sc->cap;
462 int was_active = sw->active;
464 if (sw->rate) {
465 st_rate_stop (sw->rate);
466 sw->rate = NULL;
469 QLIST_REMOVE (sw, entries);
470 QLIST_REMOVE (sc, entries);
471 g_free (sc);
472 if (was_active) {
473 /* We have removed soft voice from the capture:
474 this might have changed the overall status of the capture
475 since this might have been the only active voice */
476 audio_recalc_and_notify_capture (cap);
478 sc = sc1;
482 static int audio_attach_capture (HWVoiceOut *hw)
484 AudioState *s = &glob_audio_state;
485 CaptureVoiceOut *cap;
487 audio_detach_capture (hw);
488 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
489 SWVoiceCap *sc;
490 SWVoiceOut *sw;
491 HWVoiceOut *hw_cap = &cap->hw;
493 sc = g_malloc0(sizeof(*sc));
495 sc->cap = cap;
496 sw = &sc->sw;
497 sw->hw = hw_cap;
498 sw->info = hw->info;
499 sw->empty = 1;
500 sw->active = hw->enabled;
501 sw->conv = noop_conv;
502 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
503 sw->vol = nominal_volume;
504 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
505 if (!sw->rate) {
506 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
507 g_free (sw);
508 return -1;
510 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
511 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
512 #ifdef DEBUG_CAPTURE
513 sw->name = g_strdup_printf ("for %p %d,%d,%d",
514 hw, sw->info.freq, sw->info.bits,
515 sw->info.nchannels);
516 dolog ("Added %s active = %d\n", sw->name, sw->active);
517 #endif
518 if (sw->active) {
519 audio_capture_maybe_changed (cap, 1);
522 return 0;
526 * Hard voice (capture)
528 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
530 SWVoiceIn *sw;
531 int m = hw->total_samples_captured;
533 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
534 if (sw->active) {
535 m = audio_MIN (m, sw->total_hw_samples_acquired);
538 return m;
541 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
543 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
544 if (audio_bug(__func__, live < 0 || live > hw->samples)) {
545 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
546 return 0;
548 return live;
551 int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
552 int live, int pending)
554 int left = hw->samples - pending;
555 int len = audio_MIN (left, live);
556 int clipped = 0;
558 while (len) {
559 struct st_sample *src = hw->mix_buf + hw->rpos;
560 uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
561 int samples_till_end_of_buf = hw->samples - hw->rpos;
562 int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
564 hw->clip (dst, src, samples_to_clip);
566 hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
567 len -= samples_to_clip;
568 clipped += samples_to_clip;
570 return clipped;
574 * Soft voice (capture)
576 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
578 HWVoiceIn *hw = sw->hw;
579 int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
580 int rpos;
582 if (audio_bug(__func__, live < 0 || live > hw->samples)) {
583 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
584 return 0;
587 rpos = hw->wpos - live;
588 if (rpos >= 0) {
589 return rpos;
591 else {
592 return hw->samples + rpos;
596 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
598 HWVoiceIn *hw = sw->hw;
599 int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
600 struct st_sample *src, *dst = sw->buf;
602 rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
604 live = hw->total_samples_captured - sw->total_hw_samples_acquired;
605 if (audio_bug(__func__, live < 0 || live > hw->samples)) {
606 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
607 return 0;
610 samples = size >> sw->info.shift;
611 if (!live) {
612 return 0;
615 swlim = (live * sw->ratio) >> 32;
616 swlim = audio_MIN (swlim, samples);
618 while (swlim) {
619 src = hw->conv_buf + rpos;
620 isamp = hw->wpos - rpos;
621 /* XXX: <= ? */
622 if (isamp <= 0) {
623 isamp = hw->samples - rpos;
626 if (!isamp) {
627 break;
629 osamp = swlim;
631 if (audio_bug(__func__, osamp < 0)) {
632 dolog ("osamp=%d\n", osamp);
633 return 0;
636 st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
637 swlim -= osamp;
638 rpos = (rpos + isamp) % hw->samples;
639 dst += osamp;
640 ret += osamp;
641 total += isamp;
644 if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
645 mixeng_volume (sw->buf, ret, &sw->vol);
648 sw->clip (buf, sw->buf, ret);
649 sw->total_hw_samples_acquired += total;
650 return ret << sw->info.shift;
654 * Hard voice (playback)
656 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
658 SWVoiceOut *sw;
659 int m = INT_MAX;
660 int nb_live = 0;
662 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
663 if (sw->active || !sw->empty) {
664 m = audio_MIN (m, sw->total_hw_samples_mixed);
665 nb_live += 1;
669 *nb_livep = nb_live;
670 return m;
673 static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
675 int smin;
676 int nb_live1;
678 smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
679 if (nb_live) {
680 *nb_live = nb_live1;
683 if (nb_live1) {
684 int live = smin;
686 if (audio_bug(__func__, live < 0 || live > hw->samples)) {
687 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
688 return 0;
690 return live;
692 return 0;
696 * Soft voice (playback)
698 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
700 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
701 int ret = 0, pos = 0, total = 0;
703 if (!sw) {
704 return size;
707 hwsamples = sw->hw->samples;
709 live = sw->total_hw_samples_mixed;
710 if (audio_bug(__func__, live < 0 || live > hwsamples)) {
711 dolog ("live=%d hw->samples=%d\n", live, hwsamples);
712 return 0;
715 if (live == hwsamples) {
716 #ifdef DEBUG_OUT
717 dolog ("%s is full %d\n", sw->name, live);
718 #endif
719 return 0;
722 wpos = (sw->hw->rpos + live) % hwsamples;
723 samples = size >> sw->info.shift;
725 dead = hwsamples - live;
726 swlim = ((int64_t) dead << 32) / sw->ratio;
727 swlim = audio_MIN (swlim, samples);
728 if (swlim) {
729 sw->conv (sw->buf, buf, swlim);
731 if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
732 mixeng_volume (sw->buf, swlim, &sw->vol);
736 while (swlim) {
737 dead = hwsamples - live;
738 left = hwsamples - wpos;
739 blck = audio_MIN (dead, left);
740 if (!blck) {
741 break;
743 isamp = swlim;
744 osamp = blck;
745 st_rate_flow_mix (
746 sw->rate,
747 sw->buf + pos,
748 sw->hw->mix_buf + wpos,
749 &isamp,
750 &osamp
752 ret += isamp;
753 swlim -= isamp;
754 pos += isamp;
755 live += osamp;
756 wpos = (wpos + osamp) % hwsamples;
757 total += osamp;
760 sw->total_hw_samples_mixed += total;
761 sw->empty = sw->total_hw_samples_mixed == 0;
763 #ifdef DEBUG_OUT
764 dolog (
765 "%s: write size %d ret %d total sw %d\n",
766 SW_NAME (sw),
767 size >> sw->info.shift,
768 ret,
769 sw->total_hw_samples_mixed
771 #endif
773 return ret << sw->info.shift;
776 #ifdef DEBUG_AUDIO
777 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
779 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
780 cap, info->bits, info->sign, info->freq, info->nchannels);
782 #endif
784 #define DAC
785 #include "audio_template.h"
786 #undef DAC
787 #include "audio_template.h"
790 * Timer
793 static bool audio_timer_running;
794 static uint64_t audio_timer_last;
796 static int audio_is_timer_needed (void)
798 HWVoiceIn *hwi = NULL;
799 HWVoiceOut *hwo = NULL;
801 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
802 if (!hwo->poll_mode) return 1;
804 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
805 if (!hwi->poll_mode) return 1;
807 return 0;
810 static void audio_reset_timer (AudioState *s)
812 if (audio_is_timer_needed ()) {
813 timer_mod_anticipate_ns(s->ts,
814 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->period_ticks);
815 if (!audio_timer_running) {
816 audio_timer_running = true;
817 audio_timer_last = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
818 trace_audio_timer_start(s->period_ticks / SCALE_MS);
820 } else {
821 timer_del(s->ts);
822 if (audio_timer_running) {
823 audio_timer_running = false;
824 trace_audio_timer_stop();
829 static void audio_timer (void *opaque)
831 int64_t now, diff;
832 AudioState *s = opaque;
834 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
835 diff = now - audio_timer_last;
836 if (diff > s->period_ticks * 3 / 2) {
837 trace_audio_timer_delayed(diff / SCALE_MS);
839 audio_timer_last = now;
841 audio_run("timer");
842 audio_reset_timer(s);
846 * Public API
848 int AUD_write (SWVoiceOut *sw, void *buf, int size)
850 if (!sw) {
851 /* XXX: Consider options */
852 return size;
855 if (!sw->hw->enabled) {
856 dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
857 return 0;
860 return sw->hw->pcm_ops->write(sw, buf, size);
863 int AUD_read (SWVoiceIn *sw, void *buf, int size)
865 if (!sw) {
866 /* XXX: Consider options */
867 return size;
870 if (!sw->hw->enabled) {
871 dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
872 return 0;
875 return sw->hw->pcm_ops->read(sw, buf, size);
878 int AUD_get_buffer_size_out (SWVoiceOut *sw)
880 return sw->hw->samples << sw->hw->info.shift;
883 void AUD_set_active_out (SWVoiceOut *sw, int on)
885 HWVoiceOut *hw;
887 if (!sw) {
888 return;
891 hw = sw->hw;
892 if (sw->active != on) {
893 AudioState *s = &glob_audio_state;
894 SWVoiceOut *temp_sw;
895 SWVoiceCap *sc;
897 if (on) {
898 hw->pending_disable = 0;
899 if (!hw->enabled) {
900 hw->enabled = 1;
901 if (s->vm_running) {
902 hw->pcm_ops->ctl_out(hw, VOICE_ENABLE);
903 audio_reset_timer (s);
907 else {
908 if (hw->enabled) {
909 int nb_active = 0;
911 for (temp_sw = hw->sw_head.lh_first; temp_sw;
912 temp_sw = temp_sw->entries.le_next) {
913 nb_active += temp_sw->active != 0;
916 hw->pending_disable = nb_active == 1;
920 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
921 sc->sw.active = hw->enabled;
922 if (hw->enabled) {
923 audio_capture_maybe_changed (sc->cap, 1);
926 sw->active = on;
930 void AUD_set_active_in (SWVoiceIn *sw, int on)
932 HWVoiceIn *hw;
934 if (!sw) {
935 return;
938 hw = sw->hw;
939 if (sw->active != on) {
940 AudioState *s = &glob_audio_state;
941 SWVoiceIn *temp_sw;
943 if (on) {
944 if (!hw->enabled) {
945 hw->enabled = 1;
946 if (s->vm_running) {
947 hw->pcm_ops->ctl_in(hw, VOICE_ENABLE);
948 audio_reset_timer (s);
951 sw->total_hw_samples_acquired = hw->total_samples_captured;
953 else {
954 if (hw->enabled) {
955 int nb_active = 0;
957 for (temp_sw = hw->sw_head.lh_first; temp_sw;
958 temp_sw = temp_sw->entries.le_next) {
959 nb_active += temp_sw->active != 0;
962 if (nb_active == 1) {
963 hw->enabled = 0;
964 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
968 sw->active = on;
972 static int audio_get_avail (SWVoiceIn *sw)
974 int live;
976 if (!sw) {
977 return 0;
980 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
981 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
982 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
983 return 0;
986 ldebug (
987 "%s: get_avail live %d ret %" PRId64 "\n",
988 SW_NAME (sw),
989 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
992 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
995 static int audio_get_free (SWVoiceOut *sw)
997 int live, dead;
999 if (!sw) {
1000 return 0;
1003 live = sw->total_hw_samples_mixed;
1005 if (audio_bug(__func__, live < 0 || live > sw->hw->samples)) {
1006 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1007 return 0;
1010 dead = sw->hw->samples - live;
1012 #ifdef DEBUG_OUT
1013 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1014 SW_NAME (sw),
1015 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1016 #endif
1018 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1021 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1023 int n;
1025 if (hw->enabled) {
1026 SWVoiceCap *sc;
1028 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1029 SWVoiceOut *sw = &sc->sw;
1030 int rpos2 = rpos;
1032 n = samples;
1033 while (n) {
1034 int till_end_of_hw = hw->samples - rpos2;
1035 int to_write = audio_MIN (till_end_of_hw, n);
1036 int bytes = to_write << hw->info.shift;
1037 int written;
1039 sw->buf = hw->mix_buf + rpos2;
1040 written = audio_pcm_sw_write (sw, NULL, bytes);
1041 if (written - bytes) {
1042 dolog ("Could not mix %d bytes into a capture "
1043 "buffer, mixed %d\n",
1044 bytes, written);
1045 break;
1047 n -= to_write;
1048 rpos2 = (rpos2 + to_write) % hw->samples;
1053 n = audio_MIN (samples, hw->samples - rpos);
1054 mixeng_clear (hw->mix_buf + rpos, n);
1055 mixeng_clear (hw->mix_buf, samples - n);
1058 static void audio_run_out (AudioState *s)
1060 HWVoiceOut *hw = NULL;
1061 SWVoiceOut *sw;
1063 while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1064 int played;
1065 int live, free, nb_live, cleanup_required, prev_rpos;
1067 live = audio_pcm_hw_get_live_out (hw, &nb_live);
1068 if (!nb_live) {
1069 live = 0;
1072 if (audio_bug(__func__, live < 0 || live > hw->samples)) {
1073 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1074 continue;
1077 if (hw->pending_disable && !nb_live) {
1078 SWVoiceCap *sc;
1079 #ifdef DEBUG_OUT
1080 dolog ("Disabling voice\n");
1081 #endif
1082 hw->enabled = 0;
1083 hw->pending_disable = 0;
1084 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1085 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1086 sc->sw.active = 0;
1087 audio_recalc_and_notify_capture (sc->cap);
1089 continue;
1092 if (!live) {
1093 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1094 if (sw->active) {
1095 free = audio_get_free (sw);
1096 if (free > 0) {
1097 sw->callback.fn (sw->callback.opaque, free);
1101 continue;
1104 prev_rpos = hw->rpos;
1105 played = hw->pcm_ops->run_out (hw, live);
1106 replay_audio_out(&played);
1107 if (audio_bug(__func__, hw->rpos >= hw->samples)) {
1108 dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1109 hw->rpos, hw->samples, played);
1110 hw->rpos = 0;
1113 #ifdef DEBUG_OUT
1114 dolog ("played=%d\n", played);
1115 #endif
1117 if (played) {
1118 hw->ts_helper += played;
1119 audio_capture_mix_and_clear (hw, prev_rpos, played);
1122 cleanup_required = 0;
1123 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1124 if (!sw->active && sw->empty) {
1125 continue;
1128 if (audio_bug(__func__, played > sw->total_hw_samples_mixed)) {
1129 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1130 played, sw->total_hw_samples_mixed);
1131 played = sw->total_hw_samples_mixed;
1134 sw->total_hw_samples_mixed -= played;
1136 if (!sw->total_hw_samples_mixed) {
1137 sw->empty = 1;
1138 cleanup_required |= !sw->active && !sw->callback.fn;
1141 if (sw->active) {
1142 free = audio_get_free (sw);
1143 if (free > 0) {
1144 sw->callback.fn (sw->callback.opaque, free);
1149 if (cleanup_required) {
1150 SWVoiceOut *sw1;
1152 sw = hw->sw_head.lh_first;
1153 while (sw) {
1154 sw1 = sw->entries.le_next;
1155 if (!sw->active && !sw->callback.fn) {
1156 audio_close_out (sw);
1158 sw = sw1;
1164 static void audio_run_in (AudioState *s)
1166 HWVoiceIn *hw = NULL;
1168 while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1169 SWVoiceIn *sw;
1170 int captured = 0, min;
1172 if (replay_mode != REPLAY_MODE_PLAY) {
1173 captured = hw->pcm_ops->run_in(hw);
1175 replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
1177 min = audio_pcm_hw_find_min_in (hw);
1178 hw->total_samples_captured += captured - min;
1179 hw->ts_helper += captured;
1181 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1182 sw->total_hw_samples_acquired -= min;
1184 if (sw->active) {
1185 int avail;
1187 avail = audio_get_avail (sw);
1188 if (avail > 0) {
1189 sw->callback.fn (sw->callback.opaque, avail);
1196 static void audio_run_capture (AudioState *s)
1198 CaptureVoiceOut *cap;
1200 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1201 int live, rpos, captured;
1202 HWVoiceOut *hw = &cap->hw;
1203 SWVoiceOut *sw;
1205 captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1206 rpos = hw->rpos;
1207 while (live) {
1208 int left = hw->samples - rpos;
1209 int to_capture = audio_MIN (live, left);
1210 struct st_sample *src;
1211 struct capture_callback *cb;
1213 src = hw->mix_buf + rpos;
1214 hw->clip (cap->buf, src, to_capture);
1215 mixeng_clear (src, to_capture);
1217 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1218 cb->ops.capture (cb->opaque, cap->buf,
1219 to_capture << hw->info.shift);
1221 rpos = (rpos + to_capture) % hw->samples;
1222 live -= to_capture;
1224 hw->rpos = rpos;
1226 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1227 if (!sw->active && sw->empty) {
1228 continue;
1231 if (audio_bug(__func__, captured > sw->total_hw_samples_mixed)) {
1232 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1233 captured, sw->total_hw_samples_mixed);
1234 captured = sw->total_hw_samples_mixed;
1237 sw->total_hw_samples_mixed -= captured;
1238 sw->empty = sw->total_hw_samples_mixed == 0;
1243 void audio_run (const char *msg)
1245 AudioState *s = &glob_audio_state;
1247 audio_run_out (s);
1248 audio_run_in (s);
1249 audio_run_capture (s);
1250 #ifdef DEBUG_POLL
1252 static double prevtime;
1253 double currtime;
1254 struct timeval tv;
1256 if (gettimeofday (&tv, NULL)) {
1257 perror ("audio_run: gettimeofday");
1258 return;
1261 currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1262 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1263 prevtime = currtime;
1265 #endif
1268 static int audio_driver_init(AudioState *s, struct audio_driver *drv,
1269 bool msg, Audiodev *dev)
1271 s->drv_opaque = drv->init(dev);
1273 if (s->drv_opaque) {
1274 audio_init_nb_voices_out (drv);
1275 audio_init_nb_voices_in (drv);
1276 s->drv = drv;
1277 return 0;
1279 else {
1280 if (msg) {
1281 dolog("Could not init `%s' audio driver\n", drv->name);
1283 return -1;
1287 static void audio_vm_change_state_handler (void *opaque, int running,
1288 RunState state)
1290 AudioState *s = opaque;
1291 HWVoiceOut *hwo = NULL;
1292 HWVoiceIn *hwi = NULL;
1293 int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1295 s->vm_running = running;
1296 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1297 hwo->pcm_ops->ctl_out(hwo, op);
1300 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1301 hwi->pcm_ops->ctl_in(hwi, op);
1303 audio_reset_timer (s);
1306 static bool is_cleaning_up;
1308 bool audio_is_cleaning_up(void)
1310 return is_cleaning_up;
1313 void audio_cleanup(void)
1315 AudioState *s = &glob_audio_state;
1316 HWVoiceOut *hwo, *hwon;
1317 HWVoiceIn *hwi, *hwin;
1319 is_cleaning_up = true;
1320 QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
1321 SWVoiceCap *sc;
1323 if (hwo->enabled) {
1324 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1326 hwo->pcm_ops->fini_out (hwo);
1328 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1329 CaptureVoiceOut *cap = sc->cap;
1330 struct capture_callback *cb;
1332 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1333 cb->ops.destroy (cb->opaque);
1336 QLIST_REMOVE(hwo, entries);
1339 QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
1340 if (hwi->enabled) {
1341 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1343 hwi->pcm_ops->fini_in (hwi);
1344 QLIST_REMOVE(hwi, entries);
1347 if (s->drv) {
1348 s->drv->fini (s->drv_opaque);
1349 s->drv = NULL;
1352 if (s->dev) {
1353 qapi_free_Audiodev(s->dev);
1354 s->dev = NULL;
1358 static const VMStateDescription vmstate_audio = {
1359 .name = "audio",
1360 .version_id = 1,
1361 .minimum_version_id = 1,
1362 .fields = (VMStateField[]) {
1363 VMSTATE_END_OF_LIST()
1367 static void audio_validate_opts(Audiodev *dev, Error **errp);
1369 static AudiodevListEntry *audiodev_find(
1370 AudiodevListHead *head, const char *drvname)
1372 AudiodevListEntry *e;
1373 QSIMPLEQ_FOREACH(e, head, next) {
1374 if (strcmp(AudiodevDriver_str(e->dev->driver), drvname) == 0) {
1375 return e;
1379 return NULL;
1382 static int audio_init(Audiodev *dev)
1384 size_t i;
1385 int done = 0;
1386 const char *drvname = NULL;
1387 VMChangeStateEntry *e;
1388 AudioState *s = &glob_audio_state;
1389 struct audio_driver *driver;
1390 /* silence gcc warning about uninitialized variable */
1391 AudiodevListHead head = QSIMPLEQ_HEAD_INITIALIZER(head);
1393 if (s->drv) {
1394 if (dev) {
1395 dolog("Cannot create more than one audio backend, sorry\n");
1396 qapi_free_Audiodev(dev);
1398 return -1;
1401 if (dev) {
1402 /* -audiodev option */
1403 drvname = AudiodevDriver_str(dev->driver);
1404 } else {
1405 /* legacy implicit initialization */
1406 head = audio_handle_legacy_opts();
1408 * In case of legacy initialization, all Audiodevs in the list will have
1409 * the same configuration (except the driver), so it does't matter which
1410 * one we chose. We need an Audiodev to set up AudioState before we can
1411 * init a driver. Also note that dev at this point is still in the
1412 * list.
1414 dev = QSIMPLEQ_FIRST(&head)->dev;
1415 audio_validate_opts(dev, &error_abort);
1417 s->dev = dev;
1419 QLIST_INIT (&s->hw_head_out);
1420 QLIST_INIT (&s->hw_head_in);
1421 QLIST_INIT (&s->cap_head);
1422 atexit(audio_cleanup);
1424 s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
1426 s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
1427 s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
1429 if (s->nb_hw_voices_out <= 0) {
1430 dolog ("Bogus number of playback voices %d, setting to 1\n",
1431 s->nb_hw_voices_out);
1432 s->nb_hw_voices_out = 1;
1435 if (s->nb_hw_voices_in <= 0) {
1436 dolog ("Bogus number of capture voices %d, setting to 0\n",
1437 s->nb_hw_voices_in);
1438 s->nb_hw_voices_in = 0;
1441 if (drvname) {
1442 driver = audio_driver_lookup(drvname);
1443 if (driver) {
1444 done = !audio_driver_init(s, driver, true, dev);
1445 } else {
1446 dolog ("Unknown audio driver `%s'\n", drvname);
1448 } else {
1449 for (i = 0; audio_prio_list[i]; i++) {
1450 AudiodevListEntry *e = audiodev_find(&head, audio_prio_list[i]);
1451 driver = audio_driver_lookup(audio_prio_list[i]);
1453 if (e && driver) {
1454 s->dev = dev = e->dev;
1455 audio_validate_opts(dev, &error_abort);
1456 done = !audio_driver_init(s, driver, false, dev);
1457 if (done) {
1458 e->dev = NULL;
1459 break;
1464 audio_free_audiodev_list(&head);
1466 if (!done) {
1467 driver = audio_driver_lookup("none");
1468 done = !audio_driver_init(s, driver, false, dev);
1469 assert(done);
1470 dolog("warning: Using timer based audio emulation\n");
1473 if (dev->timer_period <= 0) {
1474 s->period_ticks = 1;
1475 } else {
1476 s->period_ticks = dev->timer_period * SCALE_US;
1479 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1480 if (!e) {
1481 dolog ("warning: Could not register change state handler\n"
1482 "(Audio can continue looping even after stopping the VM)\n");
1485 QLIST_INIT (&s->card_head);
1486 vmstate_register (NULL, 0, &vmstate_audio, s);
1487 return 0;
1490 void audio_free_audiodev_list(AudiodevListHead *head)
1492 AudiodevListEntry *e;
1493 while ((e = QSIMPLEQ_FIRST(head))) {
1494 QSIMPLEQ_REMOVE_HEAD(head, next);
1495 qapi_free_Audiodev(e->dev);
1496 g_free(e);
1500 void AUD_register_card (const char *name, QEMUSoundCard *card)
1502 audio_init(NULL);
1503 card->name = g_strdup (name);
1504 memset (&card->entries, 0, sizeof (card->entries));
1505 QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1508 void AUD_remove_card (QEMUSoundCard *card)
1510 QLIST_REMOVE (card, entries);
1511 g_free (card->name);
1515 CaptureVoiceOut *AUD_add_capture (
1516 struct audsettings *as,
1517 struct audio_capture_ops *ops,
1518 void *cb_opaque
1521 AudioState *s = &glob_audio_state;
1522 CaptureVoiceOut *cap;
1523 struct capture_callback *cb;
1525 if (audio_validate_settings (as)) {
1526 dolog ("Invalid settings were passed when trying to add capture\n");
1527 audio_print_settings (as);
1528 return NULL;
1531 cb = g_malloc0(sizeof(*cb));
1532 cb->ops = *ops;
1533 cb->opaque = cb_opaque;
1535 cap = audio_pcm_capture_find_specific (as);
1536 if (cap) {
1537 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1538 return cap;
1540 else {
1541 HWVoiceOut *hw;
1542 CaptureVoiceOut *cap;
1544 cap = g_malloc0(sizeof(*cap));
1546 hw = &cap->hw;
1547 QLIST_INIT (&hw->sw_head);
1548 QLIST_INIT (&cap->cb_head);
1550 /* XXX find a more elegant way */
1551 hw->samples = 4096 * 4;
1552 hw->mix_buf = g_new0(struct st_sample, hw->samples);
1554 audio_pcm_init_info (&hw->info, as);
1556 cap->buf = g_malloc0_n(hw->samples, 1 << hw->info.shift);
1558 hw->clip = mixeng_clip
1559 [hw->info.nchannels == 2]
1560 [hw->info.sign]
1561 [hw->info.swap_endianness]
1562 [audio_bits_to_index (hw->info.bits)];
1564 QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1565 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1567 QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
1568 audio_attach_capture (hw);
1570 return cap;
1574 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
1576 struct capture_callback *cb;
1578 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1579 if (cb->opaque == cb_opaque) {
1580 cb->ops.destroy (cb_opaque);
1581 QLIST_REMOVE (cb, entries);
1582 g_free (cb);
1584 if (!cap->cb_head.lh_first) {
1585 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
1587 while (sw) {
1588 SWVoiceCap *sc = (SWVoiceCap *) sw;
1589 #ifdef DEBUG_CAPTURE
1590 dolog ("freeing %s\n", sw->name);
1591 #endif
1593 sw1 = sw->entries.le_next;
1594 if (sw->rate) {
1595 st_rate_stop (sw->rate);
1596 sw->rate = NULL;
1598 QLIST_REMOVE (sw, entries);
1599 QLIST_REMOVE (sc, entries);
1600 g_free (sc);
1601 sw = sw1;
1603 QLIST_REMOVE (cap, entries);
1604 g_free (cap->hw.mix_buf);
1605 g_free (cap->buf);
1606 g_free (cap);
1608 return;
1613 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1615 if (sw) {
1616 HWVoiceOut *hw = sw->hw;
1618 sw->vol.mute = mute;
1619 sw->vol.l = nominal_volume.l * lvol / 255;
1620 sw->vol.r = nominal_volume.r * rvol / 255;
1622 if (hw->pcm_ops->ctl_out) {
1623 hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
1628 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
1630 if (sw) {
1631 HWVoiceIn *hw = sw->hw;
1633 sw->vol.mute = mute;
1634 sw->vol.l = nominal_volume.l * lvol / 255;
1635 sw->vol.r = nominal_volume.r * rvol / 255;
1637 if (hw->pcm_ops->ctl_in) {
1638 hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
1643 void audio_create_pdos(Audiodev *dev)
1645 switch (dev->driver) {
1646 #define CASE(DRIVER, driver, pdo_name) \
1647 case AUDIODEV_DRIVER_##DRIVER: \
1648 if (!dev->u.driver.has_in) { \
1649 dev->u.driver.in = g_malloc0( \
1650 sizeof(Audiodev##pdo_name##PerDirectionOptions)); \
1651 dev->u.driver.has_in = true; \
1653 if (!dev->u.driver.has_out) { \
1654 dev->u.driver.out = g_malloc0( \
1655 sizeof(AudiodevAlsaPerDirectionOptions)); \
1656 dev->u.driver.has_out = true; \
1658 break
1660 CASE(NONE, none, );
1661 CASE(ALSA, alsa, Alsa);
1662 CASE(COREAUDIO, coreaudio, Coreaudio);
1663 CASE(DSOUND, dsound, );
1664 CASE(OSS, oss, Oss);
1665 CASE(PA, pa, Pa);
1666 CASE(SDL, sdl, );
1667 CASE(SPICE, spice, );
1668 CASE(WAV, wav, );
1670 case AUDIODEV_DRIVER__MAX:
1671 abort();
1675 static void audio_validate_per_direction_opts(
1676 AudiodevPerDirectionOptions *pdo, Error **errp)
1678 if (!pdo->has_fixed_settings) {
1679 pdo->has_fixed_settings = true;
1680 pdo->fixed_settings = true;
1682 if (!pdo->fixed_settings &&
1683 (pdo->has_frequency || pdo->has_channels || pdo->has_format)) {
1684 error_setg(errp,
1685 "You can't use frequency, channels or format with fixed-settings=off");
1686 return;
1689 if (!pdo->has_frequency) {
1690 pdo->has_frequency = true;
1691 pdo->frequency = 44100;
1693 if (!pdo->has_channels) {
1694 pdo->has_channels = true;
1695 pdo->channels = 2;
1697 if (!pdo->has_voices) {
1698 pdo->has_voices = true;
1699 pdo->voices = 1;
1701 if (!pdo->has_format) {
1702 pdo->has_format = true;
1703 pdo->format = AUDIO_FORMAT_S16;
1707 static void audio_validate_opts(Audiodev *dev, Error **errp)
1709 Error *err = NULL;
1711 audio_create_pdos(dev);
1713 audio_validate_per_direction_opts(audio_get_pdo_in(dev), &err);
1714 if (err) {
1715 error_propagate(errp, err);
1716 return;
1719 audio_validate_per_direction_opts(audio_get_pdo_out(dev), &err);
1720 if (err) {
1721 error_propagate(errp, err);
1722 return;
1725 if (!dev->has_timer_period) {
1726 dev->has_timer_period = true;
1727 dev->timer_period = 10000; /* 100Hz -> 10ms */
1731 void audio_parse_option(const char *opt)
1733 AudiodevListEntry *e;
1734 Audiodev *dev = NULL;
1736 Visitor *v = qobject_input_visitor_new_str(opt, "driver", &error_fatal);
1737 visit_type_Audiodev(v, NULL, &dev, &error_fatal);
1738 visit_free(v);
1740 audio_validate_opts(dev, &error_fatal);
1742 e = g_malloc0(sizeof(AudiodevListEntry));
1743 e->dev = dev;
1744 QSIMPLEQ_INSERT_TAIL(&audiodevs, e, next);
1747 void audio_init_audiodevs(void)
1749 AudiodevListEntry *e;
1751 QSIMPLEQ_FOREACH(e, &audiodevs, next) {
1752 audio_init(e->dev);
1756 audsettings audiodev_to_audsettings(AudiodevPerDirectionOptions *pdo)
1758 return (audsettings) {
1759 .freq = pdo->frequency,
1760 .nchannels = pdo->channels,
1761 .fmt = pdo->format,
1762 .endianness = AUDIO_HOST_ENDIANNESS,
1766 int audioformat_bytes_per_sample(AudioFormat fmt)
1768 switch (fmt) {
1769 case AUDIO_FORMAT_U8:
1770 case AUDIO_FORMAT_S8:
1771 return 1;
1773 case AUDIO_FORMAT_U16:
1774 case AUDIO_FORMAT_S16:
1775 return 2;
1777 case AUDIO_FORMAT_U32:
1778 case AUDIO_FORMAT_S32:
1779 return 4;
1781 case AUDIO_FORMAT__MAX:
1784 abort();
1788 /* frames = freq * usec / 1e6 */
1789 int audio_buffer_frames(AudiodevPerDirectionOptions *pdo,
1790 audsettings *as, int def_usecs)
1792 uint64_t usecs = pdo->has_buffer_length ? pdo->buffer_length : def_usecs;
1793 return (as->freq * usecs + 500000) / 1000000;
1796 /* samples = channels * frames = channels * freq * usec / 1e6 */
1797 int audio_buffer_samples(AudiodevPerDirectionOptions *pdo,
1798 audsettings *as, int def_usecs)
1800 return as->nchannels * audio_buffer_frames(pdo, as, def_usecs);
1804 * bytes = bytes_per_sample * samples =
1805 * bytes_per_sample * channels * freq * usec / 1e6
1807 int audio_buffer_bytes(AudiodevPerDirectionOptions *pdo,
1808 audsettings *as, int def_usecs)
1810 return audio_buffer_samples(pdo, as, def_usecs) *
1811 audioformat_bytes_per_sample(as->fmt);