Fix sys-queue.h conflict for good
[qemu.git] / audio / audio.c
blobe223cf3e828a58a4b2f7506c6d5c8df650f2fa0a
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.
24 #include "hw/hw.h"
25 #include "audio.h"
26 #include "monitor.h"
27 #include "qemu-timer.h"
28 #include "sysemu.h"
30 #define AUDIO_CAP "audio"
31 #include "audio_int.h"
33 /* #define DEBUG_PLIVE */
34 /* #define DEBUG_LIVE */
35 /* #define DEBUG_OUT */
36 /* #define DEBUG_CAPTURE */
37 /* #define DEBUG_POLL */
39 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
42 /* Order of CONFIG_AUDIO_DRIVERS is import.
43 The 1st one is the one used by default, that is the reason
44 that we generate the list.
46 static struct audio_driver *drvtab[] = {
47 CONFIG_AUDIO_DRIVERS
48 &no_audio_driver,
49 &wav_audio_driver
52 struct fixed_settings {
53 int enabled;
54 int nb_voices;
55 int greedy;
56 struct audsettings settings;
59 static struct {
60 struct fixed_settings fixed_out;
61 struct fixed_settings fixed_in;
62 union {
63 int hertz;
64 int64_t ticks;
65 } period;
66 int plive;
67 int log_to_monitor;
68 int try_poll_in;
69 int try_poll_out;
70 } conf = {
71 .fixed_out = { /* DAC fixed settings */
72 .enabled = 1,
73 .nb_voices = 1,
74 .greedy = 1,
75 .settings = {
76 .freq = 44100,
77 .nchannels = 2,
78 .fmt = AUD_FMT_S16,
79 .endianness = AUDIO_HOST_ENDIANNESS,
83 .fixed_in = { /* ADC fixed settings */
84 .enabled = 1,
85 .nb_voices = 1,
86 .greedy = 1,
87 .settings = {
88 .freq = 44100,
89 .nchannels = 2,
90 .fmt = AUD_FMT_S16,
91 .endianness = AUDIO_HOST_ENDIANNESS,
95 .period = { .hertz = 250 },
96 .plive = 0,
97 .log_to_monitor = 0,
98 .try_poll_in = 1,
99 .try_poll_out = 1,
102 static AudioState glob_audio_state;
104 struct mixeng_volume nominal_volume = {
105 .mute = 0,
106 #ifdef FLOAT_MIXENG
107 .r = 1.0,
108 .l = 1.0,
109 #else
110 .r = 1ULL << 32,
111 .l = 1ULL << 32,
112 #endif
115 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
116 #error No its not
117 #else
118 int audio_bug (const char *funcname, int cond)
120 if (cond) {
121 static int shown;
123 AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
124 if (!shown) {
125 shown = 1;
126 AUD_log (NULL, "Save all your work and restart without audio\n");
127 AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
128 AUD_log (NULL, "I am sorry\n");
130 AUD_log (NULL, "Context:\n");
132 #if defined AUDIO_BREAKPOINT_ON_BUG
133 # if defined HOST_I386
134 # if defined __GNUC__
135 __asm__ ("int3");
136 # elif defined _MSC_VER
137 _asm _emit 0xcc;
138 # else
139 abort ();
140 # endif
141 # else
142 abort ();
143 # endif
144 #endif
147 return cond;
149 #endif
151 static inline int audio_bits_to_index (int bits)
153 switch (bits) {
154 case 8:
155 return 0;
157 case 16:
158 return 1;
160 case 32:
161 return 2;
163 default:
164 audio_bug ("bits_to_index", 1);
165 AUD_log (NULL, "invalid bits %d\n", bits);
166 return 0;
170 void *audio_calloc (const char *funcname, int nmemb, size_t size)
172 int cond;
173 size_t len;
175 len = nmemb * size;
176 cond = !nmemb || !size;
177 cond |= nmemb < 0;
178 cond |= len < size;
180 if (audio_bug ("audio_calloc", cond)) {
181 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
182 funcname);
183 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
184 return NULL;
187 return qemu_mallocz (len);
190 static char *audio_alloc_prefix (const char *s)
192 const char qemu_prefix[] = "QEMU_";
193 size_t len, i;
194 char *r, *u;
196 if (!s) {
197 return NULL;
200 len = strlen (s);
201 r = qemu_malloc (len + sizeof (qemu_prefix));
203 u = r + sizeof (qemu_prefix) - 1;
205 pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
206 pstrcat (r, len + sizeof (qemu_prefix), s);
208 for (i = 0; i < len; ++i) {
209 u[i] = qemu_toupper(u[i]);
212 return r;
215 static const char *audio_audfmt_to_string (audfmt_e fmt)
217 switch (fmt) {
218 case AUD_FMT_U8:
219 return "U8";
221 case AUD_FMT_U16:
222 return "U16";
224 case AUD_FMT_S8:
225 return "S8";
227 case AUD_FMT_S16:
228 return "S16";
230 case AUD_FMT_U32:
231 return "U32";
233 case AUD_FMT_S32:
234 return "S32";
237 dolog ("Bogus audfmt %d returning S16\n", fmt);
238 return "S16";
241 static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
242 int *defaultp)
244 if (!strcasecmp (s, "u8")) {
245 *defaultp = 0;
246 return AUD_FMT_U8;
248 else if (!strcasecmp (s, "u16")) {
249 *defaultp = 0;
250 return AUD_FMT_U16;
252 else if (!strcasecmp (s, "u32")) {
253 *defaultp = 0;
254 return AUD_FMT_U32;
256 else if (!strcasecmp (s, "s8")) {
257 *defaultp = 0;
258 return AUD_FMT_S8;
260 else if (!strcasecmp (s, "s16")) {
261 *defaultp = 0;
262 return AUD_FMT_S16;
264 else if (!strcasecmp (s, "s32")) {
265 *defaultp = 0;
266 return AUD_FMT_S32;
268 else {
269 dolog ("Bogus audio format `%s' using %s\n",
270 s, audio_audfmt_to_string (defval));
271 *defaultp = 1;
272 return defval;
276 static audfmt_e audio_get_conf_fmt (const char *envname,
277 audfmt_e defval,
278 int *defaultp)
280 const char *var = getenv (envname);
281 if (!var) {
282 *defaultp = 1;
283 return defval;
285 return audio_string_to_audfmt (var, defval, defaultp);
288 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
290 int val;
291 char *strval;
293 strval = getenv (key);
294 if (strval) {
295 *defaultp = 0;
296 val = atoi (strval);
297 return val;
299 else {
300 *defaultp = 1;
301 return defval;
305 static const char *audio_get_conf_str (const char *key,
306 const char *defval,
307 int *defaultp)
309 const char *val = getenv (key);
310 if (!val) {
311 *defaultp = 1;
312 return defval;
314 else {
315 *defaultp = 0;
316 return val;
320 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
322 if (conf.log_to_monitor) {
323 if (cap) {
324 monitor_printf(cur_mon, "%s: ", cap);
327 monitor_vprintf(cur_mon, fmt, ap);
329 else {
330 if (cap) {
331 fprintf (stderr, "%s: ", cap);
334 vfprintf (stderr, fmt, ap);
338 void AUD_log (const char *cap, const char *fmt, ...)
340 va_list ap;
342 va_start (ap, fmt);
343 AUD_vlog (cap, fmt, ap);
344 va_end (ap);
347 static void audio_print_options (const char *prefix,
348 struct audio_option *opt)
350 char *uprefix;
352 if (!prefix) {
353 dolog ("No prefix specified\n");
354 return;
357 if (!opt) {
358 dolog ("No options\n");
359 return;
362 uprefix = audio_alloc_prefix (prefix);
364 for (; opt->name; opt++) {
365 const char *state = "default";
366 printf (" %s_%s: ", uprefix, opt->name);
368 if (opt->overriddenp && *opt->overriddenp) {
369 state = "current";
372 switch (opt->tag) {
373 case AUD_OPT_BOOL:
375 int *intp = opt->valp;
376 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
378 break;
380 case AUD_OPT_INT:
382 int *intp = opt->valp;
383 printf ("integer, %s = %d\n", state, *intp);
385 break;
387 case AUD_OPT_FMT:
389 audfmt_e *fmtp = opt->valp;
390 printf (
391 "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
392 state,
393 audio_audfmt_to_string (*fmtp)
396 break;
398 case AUD_OPT_STR:
400 const char **strp = opt->valp;
401 printf ("string, %s = %s\n",
402 state,
403 *strp ? *strp : "(not set)");
405 break;
407 default:
408 printf ("???\n");
409 dolog ("Bad value tag for option %s_%s %d\n",
410 uprefix, opt->name, opt->tag);
411 break;
413 printf (" %s\n", opt->descr);
416 qemu_free (uprefix);
419 static void audio_process_options (const char *prefix,
420 struct audio_option *opt)
422 char *optname;
423 const char qemu_prefix[] = "QEMU_";
424 size_t preflen, optlen;
426 if (audio_bug (AUDIO_FUNC, !prefix)) {
427 dolog ("prefix = NULL\n");
428 return;
431 if (audio_bug (AUDIO_FUNC, !opt)) {
432 dolog ("opt = NULL\n");
433 return;
436 preflen = strlen (prefix);
438 for (; opt->name; opt++) {
439 size_t len, i;
440 int def;
442 if (!opt->valp) {
443 dolog ("Option value pointer for `%s' is not set\n",
444 opt->name);
445 continue;
448 len = strlen (opt->name);
449 /* len of opt->name + len of prefix + size of qemu_prefix
450 * (includes trailing zero) + zero + underscore (on behalf of
451 * sizeof) */
452 optlen = len + preflen + sizeof (qemu_prefix) + 1;
453 optname = qemu_malloc (optlen);
455 pstrcpy (optname, optlen, qemu_prefix);
457 /* copy while upper-casing, including trailing zero */
458 for (i = 0; i <= preflen; ++i) {
459 optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
461 pstrcat (optname, optlen, "_");
462 pstrcat (optname, optlen, opt->name);
464 def = 1;
465 switch (opt->tag) {
466 case AUD_OPT_BOOL:
467 case AUD_OPT_INT:
469 int *intp = opt->valp;
470 *intp = audio_get_conf_int (optname, *intp, &def);
472 break;
474 case AUD_OPT_FMT:
476 audfmt_e *fmtp = opt->valp;
477 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
479 break;
481 case AUD_OPT_STR:
483 const char **strp = opt->valp;
484 *strp = audio_get_conf_str (optname, *strp, &def);
486 break;
488 default:
489 dolog ("Bad value tag for option `%s' - %d\n",
490 optname, opt->tag);
491 break;
494 if (!opt->overriddenp) {
495 opt->overriddenp = &opt->overridden;
497 *opt->overriddenp = !def;
498 qemu_free (optname);
502 static void audio_print_settings (struct audsettings *as)
504 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
506 switch (as->fmt) {
507 case AUD_FMT_S8:
508 AUD_log (NULL, "S8");
509 break;
510 case AUD_FMT_U8:
511 AUD_log (NULL, "U8");
512 break;
513 case AUD_FMT_S16:
514 AUD_log (NULL, "S16");
515 break;
516 case AUD_FMT_U16:
517 AUD_log (NULL, "U16");
518 break;
519 case AUD_FMT_S32:
520 AUD_log (NULL, "S32");
521 break;
522 case AUD_FMT_U32:
523 AUD_log (NULL, "U32");
524 break;
525 default:
526 AUD_log (NULL, "invalid(%d)", as->fmt);
527 break;
530 AUD_log (NULL, " endianness=");
531 switch (as->endianness) {
532 case 0:
533 AUD_log (NULL, "little");
534 break;
535 case 1:
536 AUD_log (NULL, "big");
537 break;
538 default:
539 AUD_log (NULL, "invalid");
540 break;
542 AUD_log (NULL, "\n");
545 static int audio_validate_settings (struct audsettings *as)
547 int invalid;
549 invalid = as->nchannels != 1 && as->nchannels != 2;
550 invalid |= as->endianness != 0 && as->endianness != 1;
552 switch (as->fmt) {
553 case AUD_FMT_S8:
554 case AUD_FMT_U8:
555 case AUD_FMT_S16:
556 case AUD_FMT_U16:
557 case AUD_FMT_S32:
558 case AUD_FMT_U32:
559 break;
560 default:
561 invalid = 1;
562 break;
565 invalid |= as->freq <= 0;
566 return invalid ? -1 : 0;
569 static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
571 int bits = 8, sign = 0;
573 switch (as->fmt) {
574 case AUD_FMT_S8:
575 sign = 1;
576 case AUD_FMT_U8:
577 break;
579 case AUD_FMT_S16:
580 sign = 1;
581 case AUD_FMT_U16:
582 bits = 16;
583 break;
585 case AUD_FMT_S32:
586 sign = 1;
587 case AUD_FMT_U32:
588 bits = 32;
589 break;
591 return info->freq == as->freq
592 && info->nchannels == as->nchannels
593 && info->sign == sign
594 && info->bits == bits
595 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
598 void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
600 int bits = 8, sign = 0, shift = 0;
602 switch (as->fmt) {
603 case AUD_FMT_S8:
604 sign = 1;
605 case AUD_FMT_U8:
606 break;
608 case AUD_FMT_S16:
609 sign = 1;
610 case AUD_FMT_U16:
611 bits = 16;
612 shift = 1;
613 break;
615 case AUD_FMT_S32:
616 sign = 1;
617 case AUD_FMT_U32:
618 bits = 32;
619 shift = 2;
620 break;
623 info->freq = as->freq;
624 info->bits = bits;
625 info->sign = sign;
626 info->nchannels = as->nchannels;
627 info->shift = (as->nchannels == 2) + shift;
628 info->align = (1 << info->shift) - 1;
629 info->bytes_per_second = info->freq << info->shift;
630 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
633 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
635 if (!len) {
636 return;
639 if (info->sign) {
640 memset (buf, 0x00, len << info->shift);
642 else {
643 switch (info->bits) {
644 case 8:
645 memset (buf, 0x80, len << info->shift);
646 break;
648 case 16:
650 int i;
651 uint16_t *p = buf;
652 int shift = info->nchannels - 1;
653 short s = INT16_MAX;
655 if (info->swap_endianness) {
656 s = bswap16 (s);
659 for (i = 0; i < len << shift; i++) {
660 p[i] = s;
663 break;
665 case 32:
667 int i;
668 uint32_t *p = buf;
669 int shift = info->nchannels - 1;
670 int32_t s = INT32_MAX;
672 if (info->swap_endianness) {
673 s = bswap32 (s);
676 for (i = 0; i < len << shift; i++) {
677 p[i] = s;
680 break;
682 default:
683 AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
684 info->bits);
685 break;
691 * Capture
693 static void noop_conv (struct st_sample *dst, const void *src,
694 int samples, struct mixeng_volume *vol)
696 (void) src;
697 (void) dst;
698 (void) samples;
699 (void) vol;
702 static CaptureVoiceOut *audio_pcm_capture_find_specific (
703 struct audsettings *as
706 CaptureVoiceOut *cap;
707 AudioState *s = &glob_audio_state;
709 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
710 if (audio_pcm_info_eq (&cap->hw.info, as)) {
711 return cap;
714 return NULL;
717 static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
719 struct capture_callback *cb;
721 #ifdef DEBUG_CAPTURE
722 dolog ("notification %d sent\n", cmd);
723 #endif
724 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
725 cb->ops.notify (cb->opaque, cmd);
729 static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
731 if (cap->hw.enabled != enabled) {
732 audcnotification_e cmd;
733 cap->hw.enabled = enabled;
734 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
735 audio_notify_capture (cap, cmd);
739 static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
741 HWVoiceOut *hw = &cap->hw;
742 SWVoiceOut *sw;
743 int enabled = 0;
745 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
746 if (sw->active) {
747 enabled = 1;
748 break;
751 audio_capture_maybe_changed (cap, enabled);
754 static void audio_detach_capture (HWVoiceOut *hw)
756 SWVoiceCap *sc = hw->cap_head.lh_first;
758 while (sc) {
759 SWVoiceCap *sc1 = sc->entries.le_next;
760 SWVoiceOut *sw = &sc->sw;
761 CaptureVoiceOut *cap = sc->cap;
762 int was_active = sw->active;
764 if (sw->rate) {
765 st_rate_stop (sw->rate);
766 sw->rate = NULL;
769 QLIST_REMOVE (sw, entries);
770 QLIST_REMOVE (sc, entries);
771 qemu_free (sc);
772 if (was_active) {
773 /* We have removed soft voice from the capture:
774 this might have changed the overall status of the capture
775 since this might have been the only active voice */
776 audio_recalc_and_notify_capture (cap);
778 sc = sc1;
782 static int audio_attach_capture (HWVoiceOut *hw)
784 AudioState *s = &glob_audio_state;
785 CaptureVoiceOut *cap;
787 audio_detach_capture (hw);
788 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
789 SWVoiceCap *sc;
790 SWVoiceOut *sw;
791 HWVoiceOut *hw_cap = &cap->hw;
793 sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
794 if (!sc) {
795 dolog ("Could not allocate soft capture voice (%zu bytes)\n",
796 sizeof (*sc));
797 return -1;
800 sc->cap = cap;
801 sw = &sc->sw;
802 sw->hw = hw_cap;
803 sw->info = hw->info;
804 sw->empty = 1;
805 sw->active = hw->enabled;
806 sw->conv = noop_conv;
807 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
808 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
809 if (!sw->rate) {
810 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
811 qemu_free (sw);
812 return -1;
814 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
815 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
816 #ifdef DEBUG_CAPTURE
817 asprintf (&sw->name, "for %p %d,%d,%d",
818 hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
819 dolog ("Added %s active = %d\n", sw->name, sw->active);
820 #endif
821 if (sw->active) {
822 audio_capture_maybe_changed (cap, 1);
825 return 0;
829 * Hard voice (capture)
831 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
833 SWVoiceIn *sw;
834 int m = hw->total_samples_captured;
836 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
837 if (sw->active) {
838 m = audio_MIN (m, sw->total_hw_samples_acquired);
841 return m;
844 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
846 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
847 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
848 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
849 return 0;
851 return live;
855 * Soft voice (capture)
857 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
859 HWVoiceIn *hw = sw->hw;
860 int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
861 int rpos;
863 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
864 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
865 return 0;
868 rpos = hw->wpos - live;
869 if (rpos >= 0) {
870 return rpos;
872 else {
873 return hw->samples + rpos;
877 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
879 HWVoiceIn *hw = sw->hw;
880 int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
881 struct st_sample *src, *dst = sw->buf;
883 rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
885 live = hw->total_samples_captured - sw->total_hw_samples_acquired;
886 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
887 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
888 return 0;
891 samples = size >> sw->info.shift;
892 if (!live) {
893 return 0;
896 swlim = (live * sw->ratio) >> 32;
897 swlim = audio_MIN (swlim, samples);
899 while (swlim) {
900 src = hw->conv_buf + rpos;
901 isamp = hw->wpos - rpos;
902 /* XXX: <= ? */
903 if (isamp <= 0) {
904 isamp = hw->samples - rpos;
907 if (!isamp) {
908 break;
910 osamp = swlim;
912 if (audio_bug (AUDIO_FUNC, osamp < 0)) {
913 dolog ("osamp=%d\n", osamp);
914 return 0;
917 st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
918 swlim -= osamp;
919 rpos = (rpos + isamp) % hw->samples;
920 dst += osamp;
921 ret += osamp;
922 total += isamp;
925 sw->clip (buf, sw->buf, ret);
926 sw->total_hw_samples_acquired += total;
927 return ret << sw->info.shift;
931 * Hard voice (playback)
933 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
935 SWVoiceOut *sw;
936 int m = INT_MAX;
937 int nb_live = 0;
939 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
940 if (sw->active || !sw->empty) {
941 m = audio_MIN (m, sw->total_hw_samples_mixed);
942 nb_live += 1;
946 *nb_livep = nb_live;
947 return m;
950 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
952 int smin;
954 smin = audio_pcm_hw_find_min_out (hw, nb_live);
956 if (!*nb_live) {
957 return 0;
959 else {
960 int live = smin;
962 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
963 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
964 return 0;
966 return live;
970 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
972 int nb_live;
973 int live;
975 live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
976 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
977 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
978 return 0;
980 return live;
984 * Soft voice (playback)
986 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
988 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
989 int ret = 0, pos = 0, total = 0;
991 if (!sw) {
992 return size;
995 hwsamples = sw->hw->samples;
997 live = sw->total_hw_samples_mixed;
998 if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
999 dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1000 return 0;
1003 if (live == hwsamples) {
1004 #ifdef DEBUG_OUT
1005 dolog ("%s is full %d\n", sw->name, live);
1006 #endif
1007 return 0;
1010 wpos = (sw->hw->rpos + live) % hwsamples;
1011 samples = size >> sw->info.shift;
1013 dead = hwsamples - live;
1014 swlim = ((int64_t) dead << 32) / sw->ratio;
1015 swlim = audio_MIN (swlim, samples);
1016 if (swlim) {
1017 sw->conv (sw->buf, buf, swlim, &sw->vol);
1020 while (swlim) {
1021 dead = hwsamples - live;
1022 left = hwsamples - wpos;
1023 blck = audio_MIN (dead, left);
1024 if (!blck) {
1025 break;
1027 isamp = swlim;
1028 osamp = blck;
1029 st_rate_flow_mix (
1030 sw->rate,
1031 sw->buf + pos,
1032 sw->hw->mix_buf + wpos,
1033 &isamp,
1034 &osamp
1036 ret += isamp;
1037 swlim -= isamp;
1038 pos += isamp;
1039 live += osamp;
1040 wpos = (wpos + osamp) % hwsamples;
1041 total += osamp;
1044 sw->total_hw_samples_mixed += total;
1045 sw->empty = sw->total_hw_samples_mixed == 0;
1047 #ifdef DEBUG_OUT
1048 dolog (
1049 "%s: write size %d ret %d total sw %d\n",
1050 SW_NAME (sw),
1051 size >> sw->info.shift,
1052 ret,
1053 sw->total_hw_samples_mixed
1055 #endif
1057 return ret << sw->info.shift;
1060 #ifdef DEBUG_AUDIO
1061 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1063 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1064 cap, info->bits, info->sign, info->freq, info->nchannels);
1066 #endif
1068 #define DAC
1069 #include "audio_template.h"
1070 #undef DAC
1071 #include "audio_template.h"
1074 * Timer
1076 static void audio_timer (void *opaque)
1078 AudioState *s = opaque;
1080 audio_run ("timer");
1081 qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1085 static int audio_is_timer_needed (void)
1087 HWVoiceIn *hwi = NULL;
1088 HWVoiceOut *hwo = NULL;
1090 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1091 if (!hwo->poll_mode) return 1;
1093 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1094 if (!hwi->poll_mode) return 1;
1096 return 0;
1099 static void audio_reset_timer (void)
1101 AudioState *s = &glob_audio_state;
1103 if (audio_is_timer_needed ()) {
1104 qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
1106 else {
1107 qemu_del_timer (s->ts);
1112 * Public API
1114 int AUD_write (SWVoiceOut *sw, void *buf, int size)
1116 int bytes;
1118 if (!sw) {
1119 /* XXX: Consider options */
1120 return size;
1123 if (!sw->hw->enabled) {
1124 dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1125 return 0;
1128 bytes = sw->hw->pcm_ops->write (sw, buf, size);
1129 return bytes;
1132 int AUD_read (SWVoiceIn *sw, void *buf, int size)
1134 int bytes;
1136 if (!sw) {
1137 /* XXX: Consider options */
1138 return size;
1141 if (!sw->hw->enabled) {
1142 dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1143 return 0;
1146 bytes = sw->hw->pcm_ops->read (sw, buf, size);
1147 return bytes;
1150 int AUD_get_buffer_size_out (SWVoiceOut *sw)
1152 return sw->hw->samples << sw->hw->info.shift;
1155 void AUD_set_active_out (SWVoiceOut *sw, int on)
1157 HWVoiceOut *hw;
1159 if (!sw) {
1160 return;
1163 hw = sw->hw;
1164 if (sw->active != on) {
1165 AudioState *s = &glob_audio_state;
1166 SWVoiceOut *temp_sw;
1167 SWVoiceCap *sc;
1169 if (on) {
1170 hw->pending_disable = 0;
1171 if (!hw->enabled) {
1172 hw->enabled = 1;
1173 if (s->vm_running) {
1174 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1175 audio_reset_timer ();
1179 else {
1180 if (hw->enabled) {
1181 int nb_active = 0;
1183 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1184 temp_sw = temp_sw->entries.le_next) {
1185 nb_active += temp_sw->active != 0;
1188 hw->pending_disable = nb_active == 1;
1192 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1193 sc->sw.active = hw->enabled;
1194 if (hw->enabled) {
1195 audio_capture_maybe_changed (sc->cap, 1);
1198 sw->active = on;
1202 void AUD_set_active_in (SWVoiceIn *sw, int on)
1204 HWVoiceIn *hw;
1206 if (!sw) {
1207 return;
1210 hw = sw->hw;
1211 if (sw->active != on) {
1212 AudioState *s = &glob_audio_state;
1213 SWVoiceIn *temp_sw;
1215 if (on) {
1216 if (!hw->enabled) {
1217 hw->enabled = 1;
1218 if (s->vm_running) {
1219 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1222 sw->total_hw_samples_acquired = hw->total_samples_captured;
1224 else {
1225 if (hw->enabled) {
1226 int nb_active = 0;
1228 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1229 temp_sw = temp_sw->entries.le_next) {
1230 nb_active += temp_sw->active != 0;
1233 if (nb_active == 1) {
1234 hw->enabled = 0;
1235 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1239 sw->active = on;
1243 static int audio_get_avail (SWVoiceIn *sw)
1245 int live;
1247 if (!sw) {
1248 return 0;
1251 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1252 if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1253 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1254 return 0;
1257 ldebug (
1258 "%s: get_avail live %d ret %" PRId64 "\n",
1259 SW_NAME (sw),
1260 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1263 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1266 static int audio_get_free (SWVoiceOut *sw)
1268 int live, dead;
1270 if (!sw) {
1271 return 0;
1274 live = sw->total_hw_samples_mixed;
1276 if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1277 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1278 return 0;
1281 dead = sw->hw->samples - live;
1283 #ifdef DEBUG_OUT
1284 dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1285 SW_NAME (sw),
1286 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1287 #endif
1289 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1292 static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1294 int n;
1296 if (hw->enabled) {
1297 SWVoiceCap *sc;
1299 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1300 SWVoiceOut *sw = &sc->sw;
1301 int rpos2 = rpos;
1303 n = samples;
1304 while (n) {
1305 int till_end_of_hw = hw->samples - rpos2;
1306 int to_write = audio_MIN (till_end_of_hw, n);
1307 int bytes = to_write << hw->info.shift;
1308 int written;
1310 sw->buf = hw->mix_buf + rpos2;
1311 written = audio_pcm_sw_write (sw, NULL, bytes);
1312 if (written - bytes) {
1313 dolog ("Could not mix %d bytes into a capture "
1314 "buffer, mixed %d\n",
1315 bytes, written);
1316 break;
1318 n -= to_write;
1319 rpos2 = (rpos2 + to_write) % hw->samples;
1324 n = audio_MIN (samples, hw->samples - rpos);
1325 mixeng_clear (hw->mix_buf + rpos, n);
1326 mixeng_clear (hw->mix_buf, samples - n);
1329 static void audio_run_out (AudioState *s)
1331 HWVoiceOut *hw = NULL;
1332 SWVoiceOut *sw;
1334 while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1335 int played;
1336 int live, free, nb_live, cleanup_required, prev_rpos;
1338 live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1339 if (!nb_live) {
1340 live = 0;
1343 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1344 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1345 continue;
1348 if (hw->pending_disable && !nb_live) {
1349 SWVoiceCap *sc;
1350 #ifdef DEBUG_OUT
1351 dolog ("Disabling voice\n");
1352 #endif
1353 hw->enabled = 0;
1354 hw->pending_disable = 0;
1355 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1356 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1357 sc->sw.active = 0;
1358 audio_recalc_and_notify_capture (sc->cap);
1360 continue;
1363 if (!live) {
1364 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1365 if (sw->active) {
1366 free = audio_get_free (sw);
1367 if (free > 0) {
1368 sw->callback.fn (sw->callback.opaque, free);
1372 continue;
1375 prev_rpos = hw->rpos;
1376 played = hw->pcm_ops->run_out (hw);
1377 if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1378 dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1379 hw->rpos, hw->samples, played);
1380 hw->rpos = 0;
1383 #ifdef DEBUG_OUT
1384 dolog ("played=%d\n", played);
1385 #endif
1387 if (played) {
1388 hw->ts_helper += played;
1389 audio_capture_mix_and_clear (hw, prev_rpos, played);
1392 cleanup_required = 0;
1393 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1394 if (!sw->active && sw->empty) {
1395 continue;
1398 if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1399 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1400 played, sw->total_hw_samples_mixed);
1401 played = sw->total_hw_samples_mixed;
1404 sw->total_hw_samples_mixed -= played;
1406 if (!sw->total_hw_samples_mixed) {
1407 sw->empty = 1;
1408 cleanup_required |= !sw->active && !sw->callback.fn;
1411 if (sw->active) {
1412 free = audio_get_free (sw);
1413 if (free > 0) {
1414 sw->callback.fn (sw->callback.opaque, free);
1419 if (cleanup_required) {
1420 SWVoiceOut *sw1;
1422 sw = hw->sw_head.lh_first;
1423 while (sw) {
1424 sw1 = sw->entries.le_next;
1425 if (!sw->active && !sw->callback.fn) {
1426 #ifdef DEBUG_PLIVE
1427 dolog ("Finishing with old voice\n");
1428 #endif
1429 audio_close_out (sw);
1431 sw = sw1;
1437 static void audio_run_in (AudioState *s)
1439 HWVoiceIn *hw = NULL;
1441 while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1442 SWVoiceIn *sw;
1443 int captured, min;
1445 captured = hw->pcm_ops->run_in (hw);
1447 min = audio_pcm_hw_find_min_in (hw);
1448 hw->total_samples_captured += captured - min;
1449 hw->ts_helper += captured;
1451 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1452 sw->total_hw_samples_acquired -= min;
1454 if (sw->active) {
1455 int avail;
1457 avail = audio_get_avail (sw);
1458 if (avail > 0) {
1459 sw->callback.fn (sw->callback.opaque, avail);
1466 static void audio_run_capture (AudioState *s)
1468 CaptureVoiceOut *cap;
1470 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1471 int live, rpos, captured;
1472 HWVoiceOut *hw = &cap->hw;
1473 SWVoiceOut *sw;
1475 captured = live = audio_pcm_hw_get_live_out (hw);
1476 rpos = hw->rpos;
1477 while (live) {
1478 int left = hw->samples - rpos;
1479 int to_capture = audio_MIN (live, left);
1480 struct st_sample *src;
1481 struct capture_callback *cb;
1483 src = hw->mix_buf + rpos;
1484 hw->clip (cap->buf, src, to_capture);
1485 mixeng_clear (src, to_capture);
1487 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1488 cb->ops.capture (cb->opaque, cap->buf,
1489 to_capture << hw->info.shift);
1491 rpos = (rpos + to_capture) % hw->samples;
1492 live -= to_capture;
1494 hw->rpos = rpos;
1496 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1497 if (!sw->active && sw->empty) {
1498 continue;
1501 if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1502 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1503 captured, sw->total_hw_samples_mixed);
1504 captured = sw->total_hw_samples_mixed;
1507 sw->total_hw_samples_mixed -= captured;
1508 sw->empty = sw->total_hw_samples_mixed == 0;
1513 void audio_run (const char *msg)
1515 AudioState *s = &glob_audio_state;
1517 audio_run_out (s);
1518 audio_run_in (s);
1519 audio_run_capture (s);
1520 #ifdef DEBUG_POLL
1522 static double prevtime;
1523 double currtime;
1524 struct timeval tv;
1526 if (gettimeofday (&tv, NULL)) {
1527 perror ("audio_run: gettimeofday");
1528 return;
1531 currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1532 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1533 prevtime = currtime;
1535 #endif
1538 static struct audio_option audio_options[] = {
1539 /* DAC */
1541 .name = "DAC_FIXED_SETTINGS",
1542 .tag = AUD_OPT_BOOL,
1543 .valp = &conf.fixed_out.enabled,
1544 .descr = "Use fixed settings for host DAC"
1547 .name = "DAC_FIXED_FREQ",
1548 .tag = AUD_OPT_INT,
1549 .valp = &conf.fixed_out.settings.freq,
1550 .descr = "Frequency for fixed host DAC"
1553 .name = "DAC_FIXED_FMT",
1554 .tag = AUD_OPT_FMT,
1555 .valp = &conf.fixed_out.settings.fmt,
1556 .descr = "Format for fixed host DAC"
1559 .name = "DAC_FIXED_CHANNELS",
1560 .tag = AUD_OPT_INT,
1561 .valp = &conf.fixed_out.settings.nchannels,
1562 .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1565 .name = "DAC_VOICES",
1566 .tag = AUD_OPT_INT,
1567 .valp = &conf.fixed_out.nb_voices,
1568 .descr = "Number of voices for DAC"
1571 .name = "DAC_TRY_POLL",
1572 .tag = AUD_OPT_BOOL,
1573 .valp = &conf.try_poll_out,
1574 .descr = "Attempt using poll mode for DAC"
1576 /* ADC */
1578 .name = "ADC_FIXED_SETTINGS",
1579 .tag = AUD_OPT_BOOL,
1580 .valp = &conf.fixed_in.enabled,
1581 .descr = "Use fixed settings for host ADC"
1584 .name = "ADC_FIXED_FREQ",
1585 .tag = AUD_OPT_INT,
1586 .valp = &conf.fixed_in.settings.freq,
1587 .descr = "Frequency for fixed host ADC"
1590 .name = "ADC_FIXED_FMT",
1591 .tag = AUD_OPT_FMT,
1592 .valp = &conf.fixed_in.settings.fmt,
1593 .descr = "Format for fixed host ADC"
1596 .name = "ADC_FIXED_CHANNELS",
1597 .tag = AUD_OPT_INT,
1598 .valp = &conf.fixed_in.settings.nchannels,
1599 .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1602 .name = "ADC_VOICES",
1603 .tag = AUD_OPT_INT,
1604 .valp = &conf.fixed_in.nb_voices,
1605 .descr = "Number of voices for ADC"
1608 .name = "ADC_TRY_POLL",
1609 .tag = AUD_OPT_BOOL,
1610 .valp = &conf.try_poll_out,
1611 .descr = "Attempt using poll mode for ADC"
1613 /* Misc */
1615 .name = "TIMER_PERIOD",
1616 .tag = AUD_OPT_INT,
1617 .valp = &conf.period.hertz,
1618 .descr = "Timer period in HZ (0 - use lowest possible)"
1621 .name = "PLIVE",
1622 .tag = AUD_OPT_BOOL,
1623 .valp = &conf.plive,
1624 .descr = "(undocumented)"
1627 .name = "LOG_TO_MONITOR",
1628 .tag = AUD_OPT_BOOL,
1629 .valp = &conf.log_to_monitor,
1630 .descr = "Print logging messages to monitor instead of stderr"
1632 { /* End of list */ }
1635 static void audio_pp_nb_voices (const char *typ, int nb)
1637 switch (nb) {
1638 case 0:
1639 printf ("Does not support %s\n", typ);
1640 break;
1641 case 1:
1642 printf ("One %s voice\n", typ);
1643 break;
1644 case INT_MAX:
1645 printf ("Theoretically supports many %s voices\n", typ);
1646 break;
1647 default:
1648 printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1649 break;
1654 void AUD_help (void)
1656 size_t i;
1658 audio_process_options ("AUDIO", audio_options);
1659 for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1660 struct audio_driver *d = drvtab[i];
1661 if (d->options) {
1662 audio_process_options (d->name, d->options);
1666 printf ("Audio options:\n");
1667 audio_print_options ("AUDIO", audio_options);
1668 printf ("\n");
1670 printf ("Available drivers:\n");
1672 for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1673 struct audio_driver *d = drvtab[i];
1675 printf ("Name: %s\n", d->name);
1676 printf ("Description: %s\n", d->descr);
1678 audio_pp_nb_voices ("playback", d->max_voices_out);
1679 audio_pp_nb_voices ("capture", d->max_voices_in);
1681 if (d->options) {
1682 printf ("Options:\n");
1683 audio_print_options (d->name, d->options);
1685 else {
1686 printf ("No options\n");
1688 printf ("\n");
1691 printf (
1692 "Options are settable through environment variables.\n"
1693 "Example:\n"
1694 #ifdef _WIN32
1695 " set QEMU_AUDIO_DRV=wav\n"
1696 " set QEMU_WAV_PATH=c:\\tune.wav\n"
1697 #else
1698 " export QEMU_AUDIO_DRV=wav\n"
1699 " export QEMU_WAV_PATH=$HOME/tune.wav\n"
1700 "(for csh replace export with setenv in the above)\n"
1701 #endif
1702 " qemu ...\n\n"
1706 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1708 if (drv->options) {
1709 audio_process_options (drv->name, drv->options);
1711 s->drv_opaque = drv->init ();
1713 if (s->drv_opaque) {
1714 audio_init_nb_voices_out (drv);
1715 audio_init_nb_voices_in (drv);
1716 s->drv = drv;
1717 return 0;
1719 else {
1720 dolog ("Could not init `%s' audio driver\n", drv->name);
1721 return -1;
1725 static void audio_vm_change_state_handler (void *opaque, int running,
1726 int reason)
1728 AudioState *s = opaque;
1729 HWVoiceOut *hwo = NULL;
1730 HWVoiceIn *hwi = NULL;
1731 int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1733 s->vm_running = running;
1734 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1735 hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1738 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1739 hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1741 audio_reset_timer ();
1744 static void audio_atexit (void)
1746 AudioState *s = &glob_audio_state;
1747 HWVoiceOut *hwo = NULL;
1748 HWVoiceIn *hwi = NULL;
1750 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1751 SWVoiceCap *sc;
1753 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1754 hwo->pcm_ops->fini_out (hwo);
1756 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1757 CaptureVoiceOut *cap = sc->cap;
1758 struct capture_callback *cb;
1760 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1761 cb->ops.destroy (cb->opaque);
1766 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1767 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1768 hwi->pcm_ops->fini_in (hwi);
1771 if (s->drv) {
1772 s->drv->fini (s->drv_opaque);
1776 static void audio_save (QEMUFile *f, void *opaque)
1778 (void) f;
1779 (void) opaque;
1782 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1784 (void) f;
1785 (void) opaque;
1787 if (version_id != 1) {
1788 return -EINVAL;
1791 return 0;
1794 static void audio_init (void)
1796 size_t i;
1797 int done = 0;
1798 const char *drvname;
1799 VMChangeStateEntry *e;
1800 AudioState *s = &glob_audio_state;
1802 if (s->drv) {
1803 return;
1806 QLIST_INIT (&s->hw_head_out);
1807 QLIST_INIT (&s->hw_head_in);
1808 QLIST_INIT (&s->cap_head);
1809 atexit (audio_atexit);
1811 s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1812 if (!s->ts) {
1813 hw_error("Could not create audio timer\n");
1816 audio_process_options ("AUDIO", audio_options);
1818 s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1819 s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1821 if (s->nb_hw_voices_out <= 0) {
1822 dolog ("Bogus number of playback voices %d, setting to 1\n",
1823 s->nb_hw_voices_out);
1824 s->nb_hw_voices_out = 1;
1827 if (s->nb_hw_voices_in <= 0) {
1828 dolog ("Bogus number of capture voices %d, setting to 0\n",
1829 s->nb_hw_voices_in);
1830 s->nb_hw_voices_in = 0;
1834 int def;
1835 drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1838 if (drvname) {
1839 int found = 0;
1841 for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1842 if (!strcmp (drvname, drvtab[i]->name)) {
1843 done = !audio_driver_init (s, drvtab[i]);
1844 found = 1;
1845 break;
1849 if (!found) {
1850 dolog ("Unknown audio driver `%s'\n", drvname);
1851 dolog ("Run with -audio-help to list available drivers\n");
1855 if (!done) {
1856 for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
1857 if (drvtab[i]->can_be_default) {
1858 done = !audio_driver_init (s, drvtab[i]);
1863 if (!done) {
1864 done = !audio_driver_init (s, &no_audio_driver);
1865 if (!done) {
1866 hw_error("Could not initialize audio subsystem\n");
1868 else {
1869 dolog ("warning: Using timer based audio emulation\n");
1873 if (conf.period.hertz <= 0) {
1874 if (conf.period.hertz < 0) {
1875 dolog ("warning: Timer period is negative - %d "
1876 "treating as zero\n",
1877 conf.period.hertz);
1879 conf.period.ticks = 1;
1880 } else {
1881 conf.period.ticks = get_ticks_per_sec() / conf.period.hertz;
1884 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1885 if (!e) {
1886 dolog ("warning: Could not register change state handler\n"
1887 "(Audio can continue looping even after stopping the VM)\n");
1890 QLIST_INIT (&s->card_head);
1891 register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1894 void AUD_register_card (const char *name, QEMUSoundCard *card)
1896 audio_init ();
1897 card->name = qemu_strdup (name);
1898 memset (&card->entries, 0, sizeof (card->entries));
1899 QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
1902 void AUD_remove_card (QEMUSoundCard *card)
1904 QLIST_REMOVE (card, entries);
1905 qemu_free (card->name);
1909 CaptureVoiceOut *AUD_add_capture (
1910 struct audsettings *as,
1911 struct audio_capture_ops *ops,
1912 void *cb_opaque
1915 AudioState *s = &glob_audio_state;
1916 CaptureVoiceOut *cap;
1917 struct capture_callback *cb;
1919 if (audio_validate_settings (as)) {
1920 dolog ("Invalid settings were passed when trying to add capture\n");
1921 audio_print_settings (as);
1922 goto err0;
1925 cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1926 if (!cb) {
1927 dolog ("Could not allocate capture callback information, size %zu\n",
1928 sizeof (*cb));
1929 goto err0;
1931 cb->ops = *ops;
1932 cb->opaque = cb_opaque;
1934 cap = audio_pcm_capture_find_specific (as);
1935 if (cap) {
1936 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1937 return cap;
1939 else {
1940 HWVoiceOut *hw;
1941 CaptureVoiceOut *cap;
1943 cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1944 if (!cap) {
1945 dolog ("Could not allocate capture voice, size %zu\n",
1946 sizeof (*cap));
1947 goto err1;
1950 hw = &cap->hw;
1951 QLIST_INIT (&hw->sw_head);
1952 QLIST_INIT (&cap->cb_head);
1954 /* XXX find a more elegant way */
1955 hw->samples = 4096 * 4;
1956 hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1957 sizeof (struct st_sample));
1958 if (!hw->mix_buf) {
1959 dolog ("Could not allocate capture mix buffer (%d samples)\n",
1960 hw->samples);
1961 goto err2;
1964 audio_pcm_init_info (&hw->info, as);
1966 cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1967 if (!cap->buf) {
1968 dolog ("Could not allocate capture buffer "
1969 "(%d samples, each %d bytes)\n",
1970 hw->samples, 1 << hw->info.shift);
1971 goto err3;
1974 hw->clip = mixeng_clip
1975 [hw->info.nchannels == 2]
1976 [hw->info.sign]
1977 [hw->info.swap_endianness]
1978 [audio_bits_to_index (hw->info.bits)];
1980 QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
1981 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1983 hw = NULL;
1984 while ((hw = audio_pcm_hw_find_any_out (hw))) {
1985 audio_attach_capture (hw);
1987 return cap;
1989 err3:
1990 qemu_free (cap->hw.mix_buf);
1991 err2:
1992 qemu_free (cap);
1993 err1:
1994 qemu_free (cb);
1995 err0:
1996 return NULL;
2000 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2002 struct capture_callback *cb;
2004 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2005 if (cb->opaque == cb_opaque) {
2006 cb->ops.destroy (cb_opaque);
2007 QLIST_REMOVE (cb, entries);
2008 qemu_free (cb);
2010 if (!cap->cb_head.lh_first) {
2011 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2013 while (sw) {
2014 SWVoiceCap *sc = (SWVoiceCap *) sw;
2015 #ifdef DEBUG_CAPTURE
2016 dolog ("freeing %s\n", sw->name);
2017 #endif
2019 sw1 = sw->entries.le_next;
2020 if (sw->rate) {
2021 st_rate_stop (sw->rate);
2022 sw->rate = NULL;
2024 QLIST_REMOVE (sw, entries);
2025 QLIST_REMOVE (sc, entries);
2026 qemu_free (sc);
2027 sw = sw1;
2029 QLIST_REMOVE (cap, entries);
2030 qemu_free (cap);
2032 return;
2037 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2039 if (sw) {
2040 sw->vol.mute = mute;
2041 sw->vol.l = nominal_volume.l * lvol / 255;
2042 sw->vol.r = nominal_volume.r * rvol / 255;
2046 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2048 if (sw) {
2049 sw->vol.mute = mute;
2050 sw->vol.l = nominal_volume.l * lvol / 255;
2051 sw->vol.r = nominal_volume.r * rvol / 255;