debuggers.hg

view tools/ioemu/audio/audio.c @ 10967:4dd640c6ce57

[qemu] Fix memset arguments in qemu audio code.
The arguments for the calls to memset are reversed in audio.c.

Signed-off-by: Charles Coffing <ccoffing@novell.com>
author chris@kneesaa.uk.xensource.com
date Fri Aug 04 10:19:53 2006 +0100 (2006-08-04)
parents b450f21472a0
children 08a11694b109
line source
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 #include "vl.h"
26 #define AUDIO_CAP "audio"
27 #include "audio_int.h"
29 /* #define DEBUG_PLIVE */
30 /* #define DEBUG_LIVE */
31 /* #define DEBUG_OUT */
33 #define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
35 static struct audio_driver *drvtab[] = {
36 #ifdef CONFIG_OSS
37 &oss_audio_driver,
38 #endif
39 #ifdef CONFIG_ALSA
40 &alsa_audio_driver,
41 #endif
42 #ifdef CONFIG_COREAUDIO
43 &coreaudio_audio_driver,
44 #endif
45 #ifdef CONFIG_DSOUND
46 &dsound_audio_driver,
47 #endif
48 #ifdef CONFIG_FMOD
49 &fmod_audio_driver,
50 #endif
51 #ifdef CONFIG_SDL
52 &sdl_audio_driver,
53 #endif
54 &no_audio_driver,
55 &wav_audio_driver
56 };
58 struct fixed_settings {
59 int enabled;
60 int nb_voices;
61 int greedy;
62 audsettings_t settings;
63 };
65 static struct {
66 struct fixed_settings fixed_out;
67 struct fixed_settings fixed_in;
68 union {
69 int hz;
70 int64_t ticks;
71 } period;
72 int plive;
73 int log_to_monitor;
74 } conf = {
75 { /* DAC fixed settings */
76 1, /* enabled */
77 1, /* nb_voices */
78 1, /* greedy */
79 {
80 44100, /* freq */
81 2, /* nchannels */
82 AUD_FMT_S16 /* fmt */
83 }
84 },
86 { /* ADC fixed settings */
87 1, /* enabled */
88 1, /* nb_voices */
89 1, /* greedy */
90 {
91 44100, /* freq */
92 2, /* nchannels */
93 AUD_FMT_S16 /* fmt */
94 }
95 },
97 { 0 }, /* period */
98 0, /* plive */
99 0 /* log_to_monitor */
100 };
102 static AudioState glob_audio_state;
104 volume_t nominal_volume = {
105 0,
106 #ifdef FLOAT_MIXENG
107 1.0,
108 1.0
109 #else
110 UINT_MAX,
111 UINT_MAX
112 #endif
113 };
115 /* http://www.df.lth.se/~john_e/gems/gem002d.html */
116 /* http://www.multi-platforms.com/Tips/PopCount.htm */
117 uint32_t popcount (uint32_t u)
118 {
119 u = ((u&0x55555555) + ((u>>1)&0x55555555));
120 u = ((u&0x33333333) + ((u>>2)&0x33333333));
121 u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
122 u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
123 u = ( u&0x0000ffff) + (u>>16);
124 return u;
125 }
127 inline uint32_t lsbindex (uint32_t u)
128 {
129 return popcount ((u&-u)-1);
130 }
132 #ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
133 #error No its not
134 #else
135 int audio_bug (const char *funcname, int cond)
136 {
137 if (cond) {
138 static int shown;
140 AUD_log (NULL, "Error a bug that was just triggered in %s\n", funcname);
141 if (!shown) {
142 shown = 1;
143 AUD_log (NULL, "Save all your work and restart without audio\n");
144 AUD_log (NULL, "Please send bug report to malc@pulsesoft.com\n");
145 AUD_log (NULL, "I am sorry\n");
146 }
147 AUD_log (NULL, "Context:\n");
149 #if defined AUDIO_BREAKPOINT_ON_BUG
150 # if defined HOST_I386
151 # if defined __GNUC__
152 __asm__ ("int3");
153 # elif defined _MSC_VER
154 _asm _emit 0xcc;
155 # else
156 abort ();
157 # endif
158 # else
159 abort ();
160 # endif
161 #endif
162 }
164 return cond;
165 }
166 #endif
168 void *audio_calloc (const char *funcname, int nmemb, size_t size)
169 {
170 int cond;
171 size_t len;
173 len = nmemb * size;
174 cond = !nmemb || !size;
175 cond |= nmemb < 0;
176 cond |= len < size;
178 if (audio_bug ("audio_calloc", cond)) {
179 AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
180 funcname);
181 AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
182 return NULL;
183 }
185 return qemu_mallocz (len);
186 }
188 static char *audio_alloc_prefix (const char *s)
189 {
190 const char qemu_prefix[] = "QEMU_";
191 size_t len;
192 char *r;
194 if (!s) {
195 return NULL;
196 }
198 len = strlen (s);
199 r = qemu_malloc (len + sizeof (qemu_prefix));
201 if (r) {
202 size_t i;
203 char *u = r + sizeof (qemu_prefix) - 1;
205 strcpy (r, qemu_prefix);
206 strcat (r, s);
208 for (i = 0; i < len; ++i) {
209 u[i] = toupper (u[i]);
210 }
211 }
212 return r;
213 }
215 const char *audio_audfmt_to_string (audfmt_e fmt)
216 {
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";
229 }
231 dolog ("Bogus audfmt %d returning S16\n", fmt);
232 return "S16";
233 }
235 audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval, int *defaultp)
236 {
237 if (!strcasecmp (s, "u8")) {
238 *defaultp = 0;
239 return AUD_FMT_U8;
240 }
241 else if (!strcasecmp (s, "u16")) {
242 *defaultp = 0;
243 return AUD_FMT_U16;
244 }
245 else if (!strcasecmp (s, "s8")) {
246 *defaultp = 0;
247 return AUD_FMT_S8;
248 }
249 else if (!strcasecmp (s, "s16")) {
250 *defaultp = 0;
251 return AUD_FMT_S16;
252 }
253 else {
254 dolog ("Bogus audio format `%s' using %s\n",
255 s, audio_audfmt_to_string (defval));
256 *defaultp = 1;
257 return defval;
258 }
259 }
261 static audfmt_e audio_get_conf_fmt (const char *envname,
262 audfmt_e defval,
263 int *defaultp)
264 {
265 const char *var = getenv (envname);
266 if (!var) {
267 *defaultp = 1;
268 return defval;
269 }
270 return audio_string_to_audfmt (var, defval, defaultp);
271 }
273 static int audio_get_conf_int (const char *key, int defval, int *defaultp)
274 {
275 int val;
276 char *strval;
278 strval = getenv (key);
279 if (strval) {
280 *defaultp = 0;
281 val = atoi (strval);
282 return val;
283 }
284 else {
285 *defaultp = 1;
286 return defval;
287 }
288 }
290 static const char *audio_get_conf_str (const char *key,
291 const char *defval,
292 int *defaultp)
293 {
294 const char *val = getenv (key);
295 if (!val) {
296 *defaultp = 1;
297 return defval;
298 }
299 else {
300 *defaultp = 0;
301 return val;
302 }
303 }
305 void AUD_vlog (const char *cap, const char *fmt, va_list ap)
306 {
307 if (conf.log_to_monitor) {
308 if (cap) {
309 term_printf ("%s: ", cap);
310 }
312 term_vprintf (fmt, ap);
313 }
314 else {
315 if (cap) {
316 fprintf (stderr, "%s: ", cap);
317 }
319 vfprintf (stderr, fmt, ap);
320 }
321 }
323 void AUD_log (const char *cap, const char *fmt, ...)
324 {
325 va_list ap;
327 va_start (ap, fmt);
328 AUD_vlog (cap, fmt, ap);
329 va_end (ap);
330 }
332 static void audio_print_options (const char *prefix,
333 struct audio_option *opt)
334 {
335 char *uprefix;
337 if (!prefix) {
338 dolog ("No prefix specified\n");
339 return;
340 }
342 if (!opt) {
343 dolog ("No options\n");
344 return;
345 }
347 uprefix = audio_alloc_prefix (prefix);
349 for (; opt->name; opt++) {
350 const char *state = "default";
351 printf (" %s_%s: ", uprefix, opt->name);
353 if (opt->overridenp && *opt->overridenp) {
354 state = "current";
355 }
357 switch (opt->tag) {
358 case AUD_OPT_BOOL:
359 {
360 int *intp = opt->valp;
361 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
362 }
363 break;
365 case AUD_OPT_INT:
366 {
367 int *intp = opt->valp;
368 printf ("integer, %s = %d\n", state, *intp);
369 }
370 break;
372 case AUD_OPT_FMT:
373 {
374 audfmt_e *fmtp = opt->valp;
375 printf (
376 "format, %s = %s, (one of: U8 S8 U16 S16)\n",
377 state,
378 audio_audfmt_to_string (*fmtp)
379 );
380 }
381 break;
383 case AUD_OPT_STR:
384 {
385 const char **strp = opt->valp;
386 printf ("string, %s = %s\n",
387 state,
388 *strp ? *strp : "(not set)");
389 }
390 break;
392 default:
393 printf ("???\n");
394 dolog ("Bad value tag for option %s_%s %d\n",
395 uprefix, opt->name, opt->tag);
396 break;
397 }
398 printf (" %s\n", opt->descr);
399 }
401 qemu_free (uprefix);
402 }
404 static void audio_process_options (const char *prefix,
405 struct audio_option *opt)
406 {
407 char *optname;
408 const char qemu_prefix[] = "QEMU_";
409 size_t preflen;
411 if (audio_bug (AUDIO_FUNC, !prefix)) {
412 dolog ("prefix = NULL\n");
413 return;
414 }
416 if (audio_bug (AUDIO_FUNC, !opt)) {
417 dolog ("opt = NULL\n");
418 return;
419 }
421 preflen = strlen (prefix);
423 for (; opt->name; opt++) {
424 size_t len, i;
425 int def;
427 if (!opt->valp) {
428 dolog ("Option value pointer for `%s' is not set\n",
429 opt->name);
430 continue;
431 }
433 len = strlen (opt->name);
434 /* len of opt->name + len of prefix + size of qemu_prefix
435 * (includes trailing zero) + zero + underscore (on behalf of
436 * sizeof) */
437 optname = qemu_malloc (len + preflen + sizeof (qemu_prefix) + 1);
438 if (!optname) {
439 dolog ("Could not allocate memory for option name `%s'\n",
440 opt->name);
441 continue;
442 }
444 strcpy (optname, qemu_prefix);
446 /* copy while upper-casing, including trailing zero */
447 for (i = 0; i <= preflen; ++i) {
448 optname[i + sizeof (qemu_prefix) - 1] = toupper (prefix[i]);
449 }
450 strcat (optname, "_");
451 strcat (optname, opt->name);
453 def = 1;
454 switch (opt->tag) {
455 case AUD_OPT_BOOL:
456 case AUD_OPT_INT:
457 {
458 int *intp = opt->valp;
459 *intp = audio_get_conf_int (optname, *intp, &def);
460 }
461 break;
463 case AUD_OPT_FMT:
464 {
465 audfmt_e *fmtp = opt->valp;
466 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
467 }
468 break;
470 case AUD_OPT_STR:
471 {
472 const char **strp = opt->valp;
473 *strp = audio_get_conf_str (optname, *strp, &def);
474 }
475 break;
477 default:
478 dolog ("Bad value tag for option `%s' - %d\n",
479 optname, opt->tag);
480 break;
481 }
483 if (!opt->overridenp) {
484 opt->overridenp = &opt->overriden;
485 }
486 *opt->overridenp = !def;
487 qemu_free (optname);
488 }
489 }
491 static void audio_print_settings (audsettings_t *as)
492 {
493 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
495 switch (as->fmt) {
496 case AUD_FMT_S8:
497 AUD_log (NULL, "S8");
498 break;
499 case AUD_FMT_U8:
500 AUD_log (NULL, "U8");
501 break;
502 case AUD_FMT_S16:
503 AUD_log (NULL, "S16");
504 break;
505 case AUD_FMT_U16:
506 AUD_log (NULL, "U16");
507 break;
508 default:
509 AUD_log (NULL, "invalid(%d)", as->fmt);
510 break;
511 }
512 AUD_log (NULL, "\n");
513 }
515 static int audio_validate_settigs (audsettings_t *as)
516 {
517 int invalid;
519 invalid = as->nchannels != 1 && as->nchannels != 2;
521 switch (as->fmt) {
522 case AUD_FMT_S8:
523 case AUD_FMT_U8:
524 case AUD_FMT_S16:
525 case AUD_FMT_U16:
526 break;
527 default:
528 invalid = 1;
529 break;
530 }
532 invalid |= as->freq <= 0;
534 if (invalid) {
535 return -1;
536 }
537 return 0;
538 }
540 static int audio_pcm_info_eq (struct audio_pcm_info *info, audsettings_t *as)
541 {
542 int bits = 8, sign = 0;
544 switch (as->fmt) {
545 case AUD_FMT_S8:
546 sign = 1;
547 case AUD_FMT_U8:
548 break;
550 case AUD_FMT_S16:
551 sign = 1;
552 case AUD_FMT_U16:
553 bits = 16;
554 break;
555 }
556 return info->freq == as->freq
557 && info->nchannels == as->nchannels
558 && info->sign == sign
559 && info->bits == bits;
560 }
562 void audio_pcm_init_info (
563 struct audio_pcm_info *info,
564 audsettings_t *as,
565 int swap_endian
566 )
567 {
568 int bits = 8, sign = 0;
570 switch (as->fmt) {
571 case AUD_FMT_S8:
572 sign = 1;
573 case AUD_FMT_U8:
574 break;
576 case AUD_FMT_S16:
577 sign = 1;
578 case AUD_FMT_U16:
579 bits = 16;
580 break;
581 }
583 info->freq = as->freq;
584 info->bits = bits;
585 info->sign = sign;
586 info->nchannels = as->nchannels;
587 info->shift = (as->nchannels == 2) + (bits == 16);
588 info->align = (1 << info->shift) - 1;
589 info->bytes_per_second = info->freq << info->shift;
590 info->swap_endian = swap_endian;
591 }
593 void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
594 {
595 if (!len) {
596 return;
597 }
599 if (info->sign) {
600 memset (buf, 0x00, len << info->shift);
601 }
602 else {
603 if (info->bits == 8) {
604 memset (buf, 0x80, len << info->shift);
605 }
606 else {
607 int i;
608 uint16_t *p = buf;
609 int shift = info->nchannels - 1;
610 short s = INT16_MAX;
612 if (info->swap_endian) {
613 s = bswap16 (s);
614 }
616 for (i = 0; i < len << shift; i++) {
617 p[i] = s;
618 }
619 }
620 }
621 }
623 /*
624 * Hard voice (capture)
625 */
626 static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
627 {
628 SWVoiceIn *sw;
629 int m = hw->total_samples_captured;
631 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
632 if (sw->active) {
633 m = audio_MIN (m, sw->total_hw_samples_acquired);
634 }
635 }
636 return m;
637 }
639 int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
640 {
641 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
642 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
643 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
644 return 0;
645 }
646 return live;
647 }
649 /*
650 * Soft voice (capture)
651 */
652 static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
653 {
654 HWVoiceIn *hw = sw->hw;
655 int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
656 int rpos;
658 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
659 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
660 return 0;
661 }
663 rpos = hw->wpos - live;
664 if (rpos >= 0) {
665 return rpos;
666 }
667 else {
668 return hw->samples + rpos;
669 }
670 }
672 int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
673 {
674 HWVoiceIn *hw = sw->hw;
675 int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
676 st_sample_t *src, *dst = sw->buf;
678 rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
680 live = hw->total_samples_captured - sw->total_hw_samples_acquired;
681 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
682 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
683 return 0;
684 }
686 samples = size >> sw->info.shift;
687 if (!live) {
688 return 0;
689 }
691 swlim = (live * sw->ratio) >> 32;
692 swlim = audio_MIN (swlim, samples);
694 while (swlim) {
695 src = hw->conv_buf + rpos;
696 isamp = hw->wpos - rpos;
697 /* XXX: <= ? */
698 if (isamp <= 0) {
699 isamp = hw->samples - rpos;
700 }
702 if (!isamp) {
703 break;
704 }
705 osamp = swlim;
707 if (audio_bug (AUDIO_FUNC, osamp < 0)) {
708 dolog ("osamp=%d\n", osamp);
709 return 0;
710 }
712 st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
713 swlim -= osamp;
714 rpos = (rpos + isamp) % hw->samples;
715 dst += osamp;
716 ret += osamp;
717 total += isamp;
718 }
720 sw->clip (buf, sw->buf, ret);
721 sw->total_hw_samples_acquired += total;
722 return ret << sw->info.shift;
723 }
725 /*
726 * Hard voice (playback)
727 */
728 static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
729 {
730 SWVoiceOut *sw;
731 int m = INT_MAX;
732 int nb_live = 0;
734 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
735 if (sw->active || !sw->empty) {
736 m = audio_MIN (m, sw->total_hw_samples_mixed);
737 nb_live += 1;
738 }
739 }
741 *nb_livep = nb_live;
742 return m;
743 }
745 int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live)
746 {
747 int smin;
749 smin = audio_pcm_hw_find_min_out (hw, nb_live);
751 if (!*nb_live) {
752 return 0;
753 }
754 else {
755 int live = smin;
757 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
758 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
759 return 0;
760 }
761 return live;
762 }
763 }
765 int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
766 {
767 int nb_live;
768 int live;
770 live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
771 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
772 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
773 return 0;
774 }
775 return live;
776 }
778 /*
779 * Soft voice (playback)
780 */
781 int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
782 {
783 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
784 int ret = 0, pos = 0, total = 0;
786 if (!sw) {
787 return size;
788 }
790 hwsamples = sw->hw->samples;
792 live = sw->total_hw_samples_mixed;
793 if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
794 dolog ("live=%d hw->samples=%d\n", live, hwsamples);
795 return 0;
796 }
798 if (live == hwsamples) {
799 return 0;
800 }
802 wpos = (sw->hw->rpos + live) % hwsamples;
803 samples = size >> sw->info.shift;
805 dead = hwsamples - live;
806 swlim = ((int64_t) dead << 32) / sw->ratio;
807 swlim = audio_MIN (swlim, samples);
808 if (swlim) {
809 sw->conv (sw->buf, buf, swlim, &sw->vol);
810 }
812 while (swlim) {
813 dead = hwsamples - live;
814 left = hwsamples - wpos;
815 blck = audio_MIN (dead, left);
816 if (!blck) {
817 break;
818 }
819 isamp = swlim;
820 osamp = blck;
821 st_rate_flow_mix (
822 sw->rate,
823 sw->buf + pos,
824 sw->hw->mix_buf + wpos,
825 &isamp,
826 &osamp
827 );
828 ret += isamp;
829 swlim -= isamp;
830 pos += isamp;
831 live += osamp;
832 wpos = (wpos + osamp) % hwsamples;
833 total += osamp;
834 }
836 sw->total_hw_samples_mixed += total;
837 sw->empty = sw->total_hw_samples_mixed == 0;
839 #ifdef DEBUG_OUT
840 dolog (
841 "%s: write size %d ret %d total sw %d\n",
842 SW_NAME (sw),
843 size >> sw->info.shift,
844 ret,
845 sw->total_hw_samples_mixed
846 );
847 #endif
849 return ret << sw->info.shift;
850 }
852 #ifdef DEBUG_AUDIO
853 static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
854 {
855 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
856 cap, info->bits, info->sign, info->freq, info->nchannels);
857 }
858 #endif
860 #define DAC
861 #include "audio_template.h"
862 #undef DAC
863 #include "audio_template.h"
865 int AUD_write (SWVoiceOut *sw, void *buf, int size)
866 {
867 int bytes;
869 if (!sw) {
870 /* XXX: Consider options */
871 return size;
872 }
874 if (!sw->hw->enabled) {
875 dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
876 return 0;
877 }
879 bytes = sw->hw->pcm_ops->write (sw, buf, size);
880 return bytes;
881 }
883 int AUD_read (SWVoiceIn *sw, void *buf, int size)
884 {
885 int bytes;
887 if (!sw) {
888 /* XXX: Consider options */
889 return size;
890 }
892 if (!sw->hw->enabled) {
893 dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
894 return 0;
895 }
897 bytes = sw->hw->pcm_ops->read (sw, buf, size);
898 return bytes;
899 }
901 int AUD_get_buffer_size_out (SWVoiceOut *sw)
902 {
903 return sw->hw->samples << sw->hw->info.shift;
904 }
906 void AUD_set_active_out (SWVoiceOut *sw, int on)
907 {
908 HWVoiceOut *hw;
910 if (!sw) {
911 return;
912 }
914 hw = sw->hw;
915 if (sw->active != on) {
916 SWVoiceOut *temp_sw;
918 if (on) {
919 int total;
921 hw->pending_disable = 0;
922 if (!hw->enabled) {
923 hw->enabled = 1;
924 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
925 }
927 if (sw->empty) {
928 total = 0;
929 }
930 }
931 else {
932 if (hw->enabled) {
933 int nb_active = 0;
935 for (temp_sw = hw->sw_head.lh_first; temp_sw;
936 temp_sw = temp_sw->entries.le_next) {
937 nb_active += temp_sw->active != 0;
938 }
940 hw->pending_disable = nb_active == 1;
941 }
942 }
943 sw->active = on;
944 }
945 }
947 void AUD_set_active_in (SWVoiceIn *sw, int on)
948 {
949 HWVoiceIn *hw;
951 if (!sw) {
952 return;
953 }
955 hw = sw->hw;
956 if (sw->active != on) {
957 SWVoiceIn *temp_sw;
959 if (on) {
960 if (!hw->enabled) {
961 hw->enabled = 1;
962 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
963 }
964 sw->total_hw_samples_acquired = hw->total_samples_captured;
965 }
966 else {
967 if (hw->enabled) {
968 int nb_active = 0;
970 for (temp_sw = hw->sw_head.lh_first; temp_sw;
971 temp_sw = temp_sw->entries.le_next) {
972 nb_active += temp_sw->active != 0;
973 }
975 if (nb_active == 1) {
976 hw->enabled = 0;
977 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
978 }
979 }
980 }
981 sw->active = on;
982 }
983 }
985 static int audio_get_avail (SWVoiceIn *sw)
986 {
987 int live;
989 if (!sw) {
990 return 0;
991 }
993 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
994 if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
995 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
996 return 0;
997 }
999 ldebug (
1000 "%s: get_avail live %d ret %lld\n",
1001 SW_NAME (sw),
1002 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1003 );
1005 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1008 static int audio_get_free (SWVoiceOut *sw)
1010 int live, dead;
1012 if (!sw) {
1013 return 0;
1016 live = sw->total_hw_samples_mixed;
1018 if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1019 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1020 return 0;
1023 dead = sw->hw->samples - live;
1025 #ifdef DEBUG_OUT
1026 dolog ("%s: get_free live %d dead %d ret %lld\n",
1027 SW_NAME (sw),
1028 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1029 #endif
1031 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1034 static void audio_run_out (AudioState *s)
1036 HWVoiceOut *hw = NULL;
1037 SWVoiceOut *sw;
1039 while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1040 int played;
1041 int live, free, nb_live, cleanup_required;
1043 live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1044 if (!nb_live) {
1045 live = 0;
1048 if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1049 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1050 continue;
1053 if (hw->pending_disable && !nb_live) {
1054 #ifdef DEBUG_OUT
1055 dolog ("Disabling voice\n");
1056 #endif
1057 hw->enabled = 0;
1058 hw->pending_disable = 0;
1059 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1060 continue;
1063 if (!live) {
1064 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1065 if (sw->active) {
1066 free = audio_get_free (sw);
1067 if (free > 0) {
1068 sw->callback.fn (sw->callback.opaque, free);
1072 continue;
1075 played = hw->pcm_ops->run_out (hw);
1076 if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1077 dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1078 hw->rpos, hw->samples, played);
1079 hw->rpos = 0;
1082 #ifdef DEBUG_OUT
1083 dolog ("played=%d\n", played);
1084 #endif
1086 if (played) {
1087 hw->ts_helper += played;
1090 cleanup_required = 0;
1091 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1092 if (!sw->active && sw->empty) {
1093 continue;
1096 if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1097 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1098 played, sw->total_hw_samples_mixed);
1099 played = sw->total_hw_samples_mixed;
1102 sw->total_hw_samples_mixed -= played;
1104 if (!sw->total_hw_samples_mixed) {
1105 sw->empty = 1;
1106 cleanup_required |= !sw->active && !sw->callback.fn;
1109 if (sw->active) {
1110 free = audio_get_free (sw);
1111 if (free > 0) {
1112 sw->callback.fn (sw->callback.opaque, free);
1117 if (cleanup_required) {
1118 restart:
1119 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1120 if (!sw->active && !sw->callback.fn) {
1121 #ifdef DEBUG_PLIVE
1122 dolog ("Finishing with old voice\n");
1123 #endif
1124 audio_close_out (s, sw);
1125 goto restart; /* play it safe */
1132 static void audio_run_in (AudioState *s)
1134 HWVoiceIn *hw = NULL;
1136 while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1137 SWVoiceIn *sw;
1138 int captured, min;
1140 captured = hw->pcm_ops->run_in (hw);
1142 min = audio_pcm_hw_find_min_in (hw);
1143 hw->total_samples_captured += captured - min;
1144 hw->ts_helper += captured;
1146 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1147 sw->total_hw_samples_acquired -= min;
1149 if (sw->active) {
1150 int avail;
1152 avail = audio_get_avail (sw);
1153 if (avail > 0) {
1154 sw->callback.fn (sw->callback.opaque, avail);
1161 static void audio_timer (void *opaque)
1163 AudioState *s = opaque;
1165 audio_run_out (s);
1166 audio_run_in (s);
1168 qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1171 static struct audio_option audio_options[] = {
1172 /* DAC */
1173 {"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1174 "Use fixed settings for host DAC", NULL, 0},
1176 {"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1177 "Frequency for fixed host DAC", NULL, 0},
1179 {"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1180 "Format for fixed host DAC", NULL, 0},
1182 {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1183 "Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1185 {"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1186 "Number of voices for DAC", NULL, 0},
1188 /* ADC */
1189 {"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1190 "Use fixed settings for host ADC", NULL, 0},
1192 {"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1193 "Frequency for fixed host ADC", NULL, 0},
1195 {"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1196 "Format for fixed host ADC", NULL, 0},
1198 {"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1199 "Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1201 {"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1202 "Number of voices for ADC", NULL, 0},
1204 /* Misc */
1205 {"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hz,
1206 "Timer period in HZ (0 - use lowest possible)", NULL, 0},
1208 {"PLIVE", AUD_OPT_BOOL, &conf.plive,
1209 "(undocumented)", NULL, 0},
1211 {"LOG_TO_MONITOR", AUD_OPT_BOOL, &conf.log_to_monitor,
1212 "print logging messages to montior instead of stderr", NULL, 0},
1214 {NULL, 0, NULL, NULL, NULL, 0}
1215 };
1217 static void audio_pp_nb_voices (const char *typ, int nb)
1219 switch (nb) {
1220 case 0:
1221 printf ("Does not support %s\n", typ);
1222 break;
1223 case 1:
1224 printf ("One %s voice\n", typ);
1225 break;
1226 case INT_MAX:
1227 printf ("Theoretically supports many %s voices\n", typ);
1228 break;
1229 default:
1230 printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1231 break;
1236 void AUD_help (void)
1238 size_t i;
1240 audio_process_options ("AUDIO", audio_options);
1241 for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1242 struct audio_driver *d = drvtab[i];
1243 if (d->options) {
1244 audio_process_options (d->name, d->options);
1248 printf ("Audio options:\n");
1249 audio_print_options ("AUDIO", audio_options);
1250 printf ("\n");
1252 printf ("Available drivers:\n");
1254 for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1255 struct audio_driver *d = drvtab[i];
1257 printf ("Name: %s\n", d->name);
1258 printf ("Description: %s\n", d->descr);
1260 audio_pp_nb_voices ("playback", d->max_voices_out);
1261 audio_pp_nb_voices ("capture", d->max_voices_in);
1263 if (d->options) {
1264 printf ("Options:\n");
1265 audio_print_options (d->name, d->options);
1267 else {
1268 printf ("No options\n");
1270 printf ("\n");
1273 printf (
1274 "Options are settable through environment variables.\n"
1275 "Example:\n"
1276 #ifdef _WIN32
1277 " set QEMU_AUDIO_DRV=wav\n"
1278 " set QEMU_WAV_PATH=c:\\tune.wav\n"
1279 #else
1280 " export QEMU_AUDIO_DRV=wav\n"
1281 " export QEMU_WAV_PATH=$HOME/tune.wav\n"
1282 "(for csh replace export with setenv in the above)\n"
1283 #endif
1284 " qemu ...\n\n"
1285 );
1288 static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1290 if (drv->options) {
1291 audio_process_options (drv->name, drv->options);
1293 s->drv_opaque = drv->init ();
1295 if (s->drv_opaque) {
1296 audio_init_nb_voices_out (s, drv);
1297 audio_init_nb_voices_in (s, drv);
1298 s->drv = drv;
1299 return 0;
1301 else {
1302 dolog ("Could not init `%s' audio driver\n", drv->name);
1303 return -1;
1307 static void audio_vm_change_state_handler (void *opaque, int running)
1309 AudioState *s = opaque;
1310 HWVoiceOut *hwo = NULL;
1311 HWVoiceIn *hwi = NULL;
1312 int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1314 while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1315 hwo->pcm_ops->ctl_out (hwo, op);
1318 while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1319 hwi->pcm_ops->ctl_in (hwi, op);
1323 static void audio_atexit (void)
1325 AudioState *s = &glob_audio_state;
1326 HWVoiceOut *hwo = NULL;
1327 HWVoiceIn *hwi = NULL;
1329 while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1330 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1331 hwo->pcm_ops->fini_out (hwo);
1334 while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1335 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1336 hwi->pcm_ops->fini_in (hwi);
1339 if (s->drv) {
1340 s->drv->fini (s->drv_opaque);
1344 static void audio_save (QEMUFile *f, void *opaque)
1346 (void) f;
1347 (void) opaque;
1350 static int audio_load (QEMUFile *f, void *opaque, int version_id)
1352 (void) f;
1353 (void) opaque;
1355 if (version_id != 1) {
1356 return -EINVAL;
1359 return 0;
1362 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card)
1364 card->audio = s;
1365 card->name = qemu_strdup (name);
1366 memset (&card->entries, 0, sizeof (card->entries));
1367 LIST_INSERT_HEAD (&s->card_head, card, entries);
1370 void AUD_remove_card (QEMUSoundCard *card)
1372 LIST_REMOVE (card, entries);
1373 card->audio = NULL;
1374 qemu_free (card->name);
1377 AudioState *AUD_init (void)
1379 size_t i;
1380 int done = 0;
1381 const char *drvname;
1382 AudioState *s = &glob_audio_state;
1384 LIST_INIT (&s->hw_head_out);
1385 LIST_INIT (&s->hw_head_in);
1386 atexit (audio_atexit);
1388 s->ts = qemu_new_timer (vm_clock, audio_timer, s);
1389 if (!s->ts) {
1390 dolog ("Could not create audio timer\n");
1391 return NULL;
1394 audio_process_options ("AUDIO", audio_options);
1396 s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1397 s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1399 if (s->nb_hw_voices_out <= 0) {
1400 dolog ("Bogus number of playback voices %d, setting to 1\n",
1401 s->nb_hw_voices_out);
1402 s->nb_hw_voices_out = 1;
1405 if (s->nb_hw_voices_in <= 0) {
1406 dolog ("Bogus number of capture voices %d, setting to 0\n",
1407 s->nb_hw_voices_in);
1408 s->nb_hw_voices_in = 0;
1412 int def;
1413 drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1416 if (drvname) {
1417 int found = 0;
1419 for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1420 if (!strcmp (drvname, drvtab[i]->name)) {
1421 done = !audio_driver_init (s, drvtab[i]);
1422 found = 1;
1423 break;
1427 if (!found) {
1428 dolog ("Unknown audio driver `%s'\n", drvname);
1429 dolog ("Run with -audio-help to list available drivers\n");
1433 if (!done) {
1434 for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1435 if (drvtab[i]->can_be_default) {
1436 done = !audio_driver_init (s, drvtab[i]);
1441 if (!done) {
1442 done = !audio_driver_init (s, &no_audio_driver);
1443 if (!done) {
1444 dolog ("Could not initialize audio subsystem\n");
1446 else {
1447 dolog ("warning: Using timer based audio emulation\n");
1451 if (done) {
1452 VMChangeStateEntry *e;
1454 if (conf.period.hz <= 0) {
1455 if (conf.period.hz < 0) {
1456 dolog ("warning: Timer period is negative - %d "
1457 "treating as zero\n",
1458 conf.period.hz);
1460 conf.period.ticks = 1;
1462 else {
1463 conf.period.ticks = ticks_per_sec / conf.period.hz;
1466 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1467 if (!e) {
1468 dolog ("warning: Could not register change state handler\n"
1469 "(Audio can continue looping even after stopping the VM)\n");
1472 else {
1473 qemu_del_timer (s->ts);
1474 return NULL;
1477 LIST_INIT (&s->card_head);
1478 register_savevm ("audio", 0, 1, audio_save, audio_load, s);
1479 qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
1480 return s;