Bug Summary

File:audio/audio.c
Location:line 450, column 12
Description:Dereference of null pointer

Annotated Source Code

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 "hw/hw.h"
25#include "audio.h"
26#include "monitor.h"
27#include "qemu-timer.h"
28#include "sysemu.h"
29
30#define AUDIO_CAP"audio" "audio"
31#include "audio_int.h"
32
33/* #define DEBUG_PLIVE */
34/* #define DEBUG_LIVE */
35/* #define DEBUG_OUT */
36/* #define DEBUG_CAPTURE */
37/* #define DEBUG_POLL */
38
39#define SW_NAME(sw)(sw)->name ? (sw)->name : "unknown" (sw)->name ? (sw)->name : "unknown"
40
41
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.
45*/
46static struct audio_driver *drvtab[] = {
47#ifdef CONFIG_SPICE
48 &spice_audio_driver,
49#endif
50 CONFIG_AUDIO_DRIVERS&oss_audio_driver,
51 &no_audio_driver,
52 &wav_audio_driver
53};
54
55struct fixed_settings {
56 int enabled;
57 int nb_voices;
58 int greedy;
59 struct audsettings settings;
60};
61
62static struct {
63 struct fixed_settings fixed_out;
64 struct fixed_settings fixed_in;
65 union {
66 int hertz;
67 int64_t ticks;
68 } period;
69 int plive;
70 int log_to_monitor;
71 int try_poll_in;
72 int try_poll_out;
73} conf = {
74 .fixed_out = { /* DAC fixed settings */
75 .enabled = 1,
76 .nb_voices = 1,
77 .greedy = 1,
78 .settings = {
79 .freq = 44100,
80 .nchannels = 2,
81 .fmt = AUD_FMT_S16,
82 .endianness = AUDIO_HOST_ENDIANNESS0,
83 }
84 },
85
86 .fixed_in = { /* ADC fixed settings */
87 .enabled = 1,
88 .nb_voices = 1,
89 .greedy = 1,
90 .settings = {
91 .freq = 44100,
92 .nchannels = 2,
93 .fmt = AUD_FMT_S16,
94 .endianness = AUDIO_HOST_ENDIANNESS0,
95 }
96 },
97
98 .period = { .hertz = 250 },
99 .plive = 0,
100 .log_to_monitor = 0,
101 .try_poll_in = 1,
102 .try_poll_out = 1,
103};
104
105static AudioState glob_audio_state;
106
107const struct mixeng_volume nominal_volume = {
108 .mute = 0,
109#ifdef FLOAT_MIXENG
110 .r = 1.0,
111 .l = 1.0,
112#else
113 .r = 1ULL << 32,
114 .l = 1ULL << 32,
115#endif
116};
117
118#ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
119#error No its not
120#else
121static void audio_print_options (const char *prefix,
122 struct audio_option *opt);
123
124int audio_bug (const char *funcname, int cond)
125{
126 if (cond) {
127 static int shown;
128
129 AUD_log (NULL((void*)0), "A bug was just triggered in %s\n", funcname);
130 if (!shown) {
131 struct audio_driver *d;
132
133 shown = 1;
134 AUD_log (NULL((void*)0), "Save all your work and restart without audio\n");
135 AUD_log (NULL((void*)0), "Please send bug report to av1474@comtv.ru\n");
136 AUD_log (NULL((void*)0), "I am sorry\n");
137 d = glob_audio_state.drv;
138 if (d) {
139 audio_print_options (d->name, d->options);
140 }
141 }
142 AUD_log (NULL((void*)0), "Context:\n");
143
144#if defined AUDIO_BREAKPOINT_ON_BUG
145# if defined HOST_I386
146# if defined __GNUC__4
147 __asm__ ("int3");
148# elif defined _MSC_VER
149 _asm _emit 0xcc;
150# else
151 abort ();
152# endif
153# else
154 abort ();
155# endif
156#endif
157 }
158
159 return cond;
160}
161#endif
162
163static inline int audio_bits_to_index (int bits)
164{
165 switch (bits) {
166 case 8:
167 return 0;
168
169 case 16:
170 return 1;
171
172 case 32:
173 return 2;
174
175 default:
176 audio_bug ("bits_to_index", 1);
177 AUD_log (NULL((void*)0), "invalid bits %d\n", bits);
178 return 0;
179 }
180}
181
182void *audio_calloc (const char *funcname, int nmemb, size_t size)
183{
184 int cond;
185 size_t len;
186
187 len = nmemb * size;
188 cond = !nmemb || !size;
189 cond |= nmemb < 0;
190 cond |= len < size;
191
192 if (audio_bug ("audio_calloc", cond)) {
193 AUD_log (NULL((void*)0), "%s passed invalid arguments to audio_calloc\n",
194 funcname);
195 AUD_log (NULL((void*)0), "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
196 return NULL((void*)0);
197 }
198
199 return g_malloc0 (len);
200}
201
202static char *audio_alloc_prefix (const char *s)
203{
204 const char qemu_prefix[] = "QEMU_";
205 size_t len, i;
206 char *r, *u;
207
208 if (!s) {
209 return NULL((void*)0);
210 }
211
212 len = strlen (s);
213 r = g_malloc (len + sizeof (qemu_prefix));
214
215 u = r + sizeof (qemu_prefix) - 1;
216
217 pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
218 pstrcat (r, len + sizeof (qemu_prefix), s);
219
220 for (i = 0; i < len; ++i) {
221 u[i] = qemu_toupper(u[i])toupper((unsigned char)(u[i]));
222 }
223
224 return r;
225}
226
227static const char *audio_audfmt_to_string (audfmt_e fmt)
228{
229 switch (fmt) {
230 case AUD_FMT_U8:
231 return "U8";
232
233 case AUD_FMT_U16:
234 return "U16";
235
236 case AUD_FMT_S8:
237 return "S8";
238
239 case AUD_FMT_S16:
240 return "S16";
241
242 case AUD_FMT_U32:
243 return "U32";
244
245 case AUD_FMT_S32:
246 return "S32";
247 }
248
249 dolog ("Bogus audfmt %d returning S16\n", fmt);
250 return "S16";
251}
252
253static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
254 int *defaultp)
255{
256 if (!strcasecmp (s, "u8")) {
257 *defaultp = 0;
258 return AUD_FMT_U8;
259 }
260 else if (!strcasecmp (s, "u16")) {
261 *defaultp = 0;
262 return AUD_FMT_U16;
263 }
264 else if (!strcasecmp (s, "u32")) {
265 *defaultp = 0;
266 return AUD_FMT_U32;
267 }
268 else if (!strcasecmp (s, "s8")) {
269 *defaultp = 0;
270 return AUD_FMT_S8;
271 }
272 else if (!strcasecmp (s, "s16")) {
273 *defaultp = 0;
274 return AUD_FMT_S16;
275 }
276 else if (!strcasecmp (s, "s32")) {
277 *defaultp = 0;
278 return AUD_FMT_S32;
279 }
280 else {
281 dolog ("Bogus audio format `%s' using %s\n",
282 s, audio_audfmt_to_string (defval));
283 *defaultp = 1;
284 return defval;
285 }
286}
287
288static audfmt_e audio_get_conf_fmt (const char *envname,
289 audfmt_e defval,
290 int *defaultp)
291{
292 const char *var = getenv (envname);
293 if (!var) {
294 *defaultp = 1;
295 return defval;
296 }
297 return audio_string_to_audfmt (var, defval, defaultp);
298}
299
300static int audio_get_conf_int (const char *key, int defval, int *defaultp)
301{
302 int val;
303 char *strval;
304
305 strval = getenv (key);
306 if (strval) {
307 *defaultp = 0;
308 val = atoi (strval);
309 return val;
310 }
311 else {
312 *defaultp = 1;
313 return defval;
314 }
315}
316
317static const char *audio_get_conf_str (const char *key,
318 const char *defval,
319 int *defaultp)
320{
321 const char *val = getenv (key);
322 if (!val) {
323 *defaultp = 1;
324 return defval;
325 }
326 else {
327 *defaultp = 0;
328 return val;
329 }
330}
331
332void AUD_vlog (const char *cap, const char *fmt, va_list ap)
333{
334 if (conf.log_to_monitor) {
335 if (cap) {
336 monitor_printf(default_mon, "%s: ", cap);
337 }
338
339 monitor_vprintf(default_mon, fmt, ap);
340 }
341 else {
342 if (cap) {
343 fprintf (stderrstderr, "%s: ", cap);
344 }
345
346 vfprintf (stderrstderr, fmt, ap);
347 }
348}
349
350void AUD_log (const char *cap, const char *fmt, ...)
351{
352 va_list ap;
353
354 va_start (ap, fmt)__builtin_va_start(ap, fmt);
355 AUD_vlog (cap, fmt, ap);
356 va_end (ap)__builtin_va_end(ap);
357}
358
359static void audio_print_options (const char *prefix,
360 struct audio_option *opt)
361{
362 char *uprefix;
363
364 if (!prefix) {
365 dolog ("No prefix specified\n");
366 return;
367 }
368
369 if (!opt) {
370 dolog ("No options\n");
371 return;
372 }
373
374 uprefix = audio_alloc_prefix (prefix);
375
376 for (; opt->name; opt++) {
377 const char *state = "default";
378 printf (" %s_%s: ", uprefix, opt->name);
379
380 if (opt->overriddenp && *opt->overriddenp) {
381 state = "current";
382 }
383
384 switch (opt->tag) {
385 case AUD_OPT_BOOL:
386 {
387 int *intp = opt->valp;
388 printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
389 }
390 break;
391
392 case AUD_OPT_INT:
393 {
394 int *intp = opt->valp;
395 printf ("integer, %s = %d\n", state, *intp);
396 }
397 break;
398
399 case AUD_OPT_FMT:
400 {
401 audfmt_e *fmtp = opt->valp;
402 printf (
403 "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
404 state,
405 audio_audfmt_to_string (*fmtp)
406 );
407 }
408 break;
409
410 case AUD_OPT_STR:
411 {
412 const char **strp = opt->valp;
413 printf ("string, %s = %s\n",
414 state,
415 *strp ? *strp : "(not set)");
416 }
417 break;
418
419 default:
420 printf ("???\n");
421 dolog ("Bad value tag for option %s_%s %d\n",
422 uprefix, opt->name, opt->tag);
423 break;
424 }
425 printf (" %s\n", opt->descr);
426 }
427
428 g_free (uprefix);
429}
430
431static void audio_process_options (const char *prefix,
432 struct audio_option *opt)
433{
434 char *optname;
435 const char qemu_prefix[] = "QEMU_";
436 size_t preflen, optlen;
437
438 if (audio_bug (AUDIO_FUNC__FUNCTION__, !prefix)) {
1
Taking false branch
439 dolog ("prefix = NULL\n");
440 return;
441 }
442
443 if (audio_bug (AUDIO_FUNC__FUNCTION__, !opt)) {
2
Assuming pointer value is null
3
Taking false branch
444 dolog ("opt = NULL\n");
445 return;
446 }
447
448 preflen = strlen (prefix);
449
450 for (; opt->name; opt++) {
4
Dereference of null pointer
451 size_t len, i;
452 int def;
453
454 if (!opt->valp) {
455 dolog ("Option value pointer for `%s' is not set\n",
456 opt->name);
457 continue;
458 }
459
460 len = strlen (opt->name);
461 /* len of opt->name + len of prefix + size of qemu_prefix
462 * (includes trailing zero) + zero + underscore (on behalf of
463 * sizeof) */
464 optlen = len + preflen + sizeof (qemu_prefix) + 1;
465 optname = g_malloc (optlen);
466
467 pstrcpy (optname, optlen, qemu_prefix);
468
469 /* copy while upper-casing, including trailing zero */
470 for (i = 0; i <= preflen; ++i) {
471 optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i])toupper((unsigned char)(prefix[i]));
472 }
473 pstrcat (optname, optlen, "_");
474 pstrcat (optname, optlen, opt->name);
475
476 def = 1;
477 switch (opt->tag) {
478 case AUD_OPT_BOOL:
479 case AUD_OPT_INT:
480 {
481 int *intp = opt->valp;
482 *intp = audio_get_conf_int (optname, *intp, &def);
483 }
484 break;
485
486 case AUD_OPT_FMT:
487 {
488 audfmt_e *fmtp = opt->valp;
489 *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
490 }
491 break;
492
493 case AUD_OPT_STR:
494 {
495 const char **strp = opt->valp;
496 *strp = audio_get_conf_str (optname, *strp, &def);
497 }
498 break;
499
500 default:
501 dolog ("Bad value tag for option `%s' - %d\n",
502 optname, opt->tag);
503 break;
504 }
505
506 if (!opt->overriddenp) {
507 opt->overriddenp = &opt->overridden;
508 }
509 *opt->overriddenp = !def;
510 g_free (optname);
511 }
512}
513
514static void audio_print_settings (struct audsettings *as)
515{
516 dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
517
518 switch (as->fmt) {
519 case AUD_FMT_S8:
520 AUD_log (NULL((void*)0), "S8");
521 break;
522 case AUD_FMT_U8:
523 AUD_log (NULL((void*)0), "U8");
524 break;
525 case AUD_FMT_S16:
526 AUD_log (NULL((void*)0), "S16");
527 break;
528 case AUD_FMT_U16:
529 AUD_log (NULL((void*)0), "U16");
530 break;
531 case AUD_FMT_S32:
532 AUD_log (NULL((void*)0), "S32");
533 break;
534 case AUD_FMT_U32:
535 AUD_log (NULL((void*)0), "U32");
536 break;
537 default:
538 AUD_log (NULL((void*)0), "invalid(%d)", as->fmt);
539 break;
540 }
541
542 AUD_log (NULL((void*)0), " endianness=");
543 switch (as->endianness) {
544 case 0:
545 AUD_log (NULL((void*)0), "little");
546 break;
547 case 1:
548 AUD_log (NULL((void*)0), "big");
549 break;
550 default:
551 AUD_log (NULL((void*)0), "invalid");
552 break;
553 }
554 AUD_log (NULL((void*)0), "\n");
555}
556
557static int audio_validate_settings (struct audsettings *as)
558{
559 int invalid;
560
561 invalid = as->nchannels != 1 && as->nchannels != 2;
562 invalid |= as->endianness != 0 && as->endianness != 1;
563
564 switch (as->fmt) {
565 case AUD_FMT_S8:
566 case AUD_FMT_U8:
567 case AUD_FMT_S16:
568 case AUD_FMT_U16:
569 case AUD_FMT_S32:
570 case AUD_FMT_U32:
571 break;
572 default:
573 invalid = 1;
574 break;
575 }
576
577 invalid |= as->freq <= 0;
578 return invalid ? -1 : 0;
579}
580
581static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
582{
583 int bits = 8, sign = 0;
584
585 switch (as->fmt) {
586 case AUD_FMT_S8:
587 sign = 1;
588 /* fall through */
589 case AUD_FMT_U8:
590 break;
591
592 case AUD_FMT_S16:
593 sign = 1;
594 /* fall through */
595 case AUD_FMT_U16:
596 bits = 16;
597 break;
598
599 case AUD_FMT_S32:
600 sign = 1;
601 /* fall through */
602 case AUD_FMT_U32:
603 bits = 32;
604 break;
605 }
606 return info->freq == as->freq
607 && info->nchannels == as->nchannels
608 && info->sign == sign
609 && info->bits == bits
610 && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS0);
611}
612
613void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
614{
615 int bits = 8, sign = 0, shift = 0;
616
617 switch (as->fmt) {
618 case AUD_FMT_S8:
619 sign = 1;
620 case AUD_FMT_U8:
621 break;
622
623 case AUD_FMT_S16:
624 sign = 1;
625 case AUD_FMT_U16:
626 bits = 16;
627 shift = 1;
628 break;
629
630 case AUD_FMT_S32:
631 sign = 1;
632 case AUD_FMT_U32:
633 bits = 32;
634 shift = 2;
635 break;
636 }
637
638 info->freq = as->freq;
639 info->bits = bits;
640 info->sign = sign;
641 info->nchannels = as->nchannels;
642 info->shift = (as->nchannels == 2) + shift;
643 info->align = (1 << info->shift) - 1;
644 info->bytes_per_second = info->freq << info->shift;
645 info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS0);
646}
647
648void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
649{
650 if (!len) {
651 return;
652 }
653
654 if (info->sign) {
655 memset (buf, 0x00, len << info->shift);
656 }
657 else {
658 switch (info->bits) {
659 case 8:
660 memset (buf, 0x80, len << info->shift);
661 break;
662
663 case 16:
664 {
665 int i;
666 uint16_t *p = buf;
667 int shift = info->nchannels - 1;
668 short s = INT16_MAX(32767);
669
670 if (info->swap_endianness) {
671 s = bswap16 (s);
672 }
673
674 for (i = 0; i < len << shift; i++) {
675 p[i] = s;
676 }
677 }
678 break;
679
680 case 32:
681 {
682 int i;
683 uint32_t *p = buf;
684 int shift = info->nchannels - 1;
685 int32_t s = INT32_MAX(2147483647);
686
687 if (info->swap_endianness) {
688 s = bswap32 (s);
689 }
690
691 for (i = 0; i < len << shift; i++) {
692 p[i] = s;
693 }
694 }
695 break;
696
697 default:
698 AUD_log (NULL((void*)0), "audio_pcm_info_clear_buf: invalid bits %d\n",
699 info->bits);
700 break;
701 }
702 }
703}
704
705/*
706 * Capture
707 */
708static void noop_conv (struct st_sample *dst, const void *src, int samples)
709{
710 (void) src;
711 (void) dst;
712 (void) samples;
713}
714
715static CaptureVoiceOut *audio_pcm_capture_find_specific (
716 struct audsettings *as
717 )
718{
719 CaptureVoiceOut *cap;
720 AudioState *s = &glob_audio_state;
721
722 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
723 if (audio_pcm_info_eq (&cap->hw.info, as)) {
724 return cap;
725 }
726 }
727 return NULL((void*)0);
728}
729
730static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
731{
732 struct capture_callback *cb;
733
734#ifdef DEBUG_CAPTURE
735 dolog ("notification %d sent\n", cmd);
736#endif
737 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
738 cb->ops.notify (cb->opaque, cmd);
739 }
740}
741
742static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
743{
744 if (cap->hw.enabled != enabled) {
745 audcnotification_e cmd;
746 cap->hw.enabled = enabled;
747 cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
748 audio_notify_capture (cap, cmd);
749 }
750}
751
752static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
753{
754 HWVoiceOut *hw = &cap->hw;
755 SWVoiceOut *sw;
756 int enabled = 0;
757
758 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
759 if (sw->active) {
760 enabled = 1;
761 break;
762 }
763 }
764 audio_capture_maybe_changed (cap, enabled);
765}
766
767static void audio_detach_capture (HWVoiceOut *hw)
768{
769 SWVoiceCap *sc = hw->cap_head.lh_first;
770
771 while (sc) {
772 SWVoiceCap *sc1 = sc->entries.le_next;
773 SWVoiceOut *sw = &sc->sw;
774 CaptureVoiceOut *cap = sc->cap;
775 int was_active = sw->active;
776
777 if (sw->rate) {
778 st_rate_stop (sw->rate);
779 sw->rate = NULL((void*)0);
780 }
781
782 QLIST_REMOVE (sw, entries)do { if ((sw)->entries.le_next != ((void*)0)) (sw)->entries
.le_next->entries.le_prev = (sw)->entries.le_prev; *(sw
)->entries.le_prev = (sw)->entries.le_next; } while ( 0
);
783 QLIST_REMOVE (sc, entries)do { if ((sc)->entries.le_next != ((void*)0)) (sc)->entries
.le_next->entries.le_prev = (sc)->entries.le_prev; *(sc
)->entries.le_prev = (sc)->entries.le_next; } while ( 0
);
784 g_free (sc);
785 if (was_active) {
786 /* We have removed soft voice from the capture:
787 this might have changed the overall status of the capture
788 since this might have been the only active voice */
789 audio_recalc_and_notify_capture (cap);
790 }
791 sc = sc1;
792 }
793}
794
795static int audio_attach_capture (HWVoiceOut *hw)
796{
797 AudioState *s = &glob_audio_state;
798 CaptureVoiceOut *cap;
799
800 audio_detach_capture (hw);
801 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
802 SWVoiceCap *sc;
803 SWVoiceOut *sw;
804 HWVoiceOut *hw_cap = &cap->hw;
805
806 sc = audio_calloc (AUDIO_FUNC__FUNCTION__, 1, sizeof (*sc));
807 if (!sc) {
808 dolog ("Could not allocate soft capture voice (%zu bytes)\n",
809 sizeof (*sc));
810 return -1;
811 }
812
813 sc->cap = cap;
814 sw = &sc->sw;
815 sw->hw = hw_cap;
816 sw->info = hw->info;
817 sw->empty = 1;
818 sw->active = hw->enabled;
819 sw->conv = noop_conv;
820 sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
821 sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
822 if (!sw->rate) {
823 dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw)(sw)->name ? (sw)->name : "unknown");
824 g_free (sw);
825 return -1;
826 }
827 QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries)do { if (((sw)->entries.le_next = (&hw_cap->sw_head
)->lh_first) != ((void*)0)) (&hw_cap->sw_head)->
lh_first->entries.le_prev = &(sw)->entries.le_next;
(&hw_cap->sw_head)->lh_first = (sw); (sw)->entries
.le_prev = &(&hw_cap->sw_head)->lh_first; } while
( 0);
828 QLIST_INSERT_HEAD (&hw->cap_head, sc, entries)do { if (((sc)->entries.le_next = (&hw->cap_head)->
lh_first) != ((void*)0)) (&hw->cap_head)->lh_first->
entries.le_prev = &(sc)->entries.le_next; (&hw->
cap_head)->lh_first = (sc); (sc)->entries.le_prev = &
(&hw->cap_head)->lh_first; } while ( 0);
829#ifdef DEBUG_CAPTURE
830 asprintf (&sw->name, "for %p %d,%d,%d",
831 hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
832 dolog ("Added %s active = %d\n", sw->name, sw->active);
833#endif
834 if (sw->active) {
835 audio_capture_maybe_changed (cap, 1);
836 }
837 }
838 return 0;
839}
840
841/*
842 * Hard voice (capture)
843 */
844static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
845{
846 SWVoiceIn *sw;
847 int m = hw->total_samples_captured;
848
849 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
850 if (sw->active) {
851 m = audio_MIN (m, sw->total_hw_samples_acquired)( __extension__ ({ __typeof (m) ta = m; __typeof (sw->total_hw_samples_acquired
) tb = sw->total_hw_samples_acquired; ((ta)>(tb)?(tb):(
ta)); }));
852 }
853 }
854 return m;
855}
856
857int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
858{
859 int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
860 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > hw->samples)) {
861 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
862 return 0;
863 }
864 return live;
865}
866
867int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
868 int live, int pending)
869{
870 int left = hw->samples - pending;
871 int len = audio_MIN (left, live)( __extension__ ({ __typeof (left) ta = left; __typeof (live)
tb = live; ((ta)>(tb)?(tb):(ta)); }));
872 int clipped = 0;
873
874 while (len) {
875 struct st_sample *src = hw->mix_buf + hw->rpos;
876 uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
877 int samples_till_end_of_buf = hw->samples - hw->rpos;
878 int samples_to_clip = audio_MIN (len, samples_till_end_of_buf)( __extension__ ({ __typeof (len) ta = len; __typeof (samples_till_end_of_buf
) tb = samples_till_end_of_buf; ((ta)>(tb)?(tb):(ta)); }));
879
880 hw->clip (dst, src, samples_to_clip);
881
882 hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
883 len -= samples_to_clip;
884 clipped += samples_to_clip;
885 }
886 return clipped;
887}
888
889/*
890 * Soft voice (capture)
891 */
892static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
893{
894 HWVoiceIn *hw = sw->hw;
895 int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
896 int rpos;
897
898 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > hw->samples)) {
899 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
900 return 0;
901 }
902
903 rpos = hw->wpos - live;
904 if (rpos >= 0) {
905 return rpos;
906 }
907 else {
908 return hw->samples + rpos;
909 }
910}
911
912int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
913{
914 HWVoiceIn *hw = sw->hw;
915 int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
916 struct st_sample *src, *dst = sw->buf;
917
918 rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
919
920 live = hw->total_samples_captured - sw->total_hw_samples_acquired;
921 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > hw->samples)) {
922 dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
923 return 0;
924 }
925
926 samples = size >> sw->info.shift;
927 if (!live) {
928 return 0;
929 }
930
931 swlim = (live * sw->ratio) >> 32;
932 swlim = audio_MIN (swlim, samples)( __extension__ ({ __typeof (swlim) ta = swlim; __typeof (samples
) tb = samples; ((ta)>(tb)?(tb):(ta)); }));
933
934 while (swlim) {
935 src = hw->conv_buf + rpos;
936 isamp = hw->wpos - rpos;
937 /* XXX: <= ? */
938 if (isamp <= 0) {
939 isamp = hw->samples - rpos;
940 }
941
942 if (!isamp) {
943 break;
944 }
945 osamp = swlim;
946
947 if (audio_bug (AUDIO_FUNC__FUNCTION__, osamp < 0)) {
948 dolog ("osamp=%d\n", osamp);
949 return 0;
950 }
951
952 st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
953 swlim -= osamp;
954 rpos = (rpos + isamp) % hw->samples;
955 dst += osamp;
956 ret += osamp;
957 total += isamp;
958 }
959
960 if (!(hw->ctl_caps & VOICE_VOLUME_CAP(1 << 3))) {
961 mixeng_volume (sw->buf, ret, &sw->vol);
962 }
963
964 sw->clip (buf, sw->buf, ret);
965 sw->total_hw_samples_acquired += total;
966 return ret << sw->info.shift;
967}
968
969/*
970 * Hard voice (playback)
971 */
972static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
973{
974 SWVoiceOut *sw;
975 int m = INT_MAX2147483647;
976 int nb_live = 0;
977
978 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
979 if (sw->active || !sw->empty) {
980 m = audio_MIN (m, sw->total_hw_samples_mixed)( __extension__ ({ __typeof (m) ta = m; __typeof (sw->total_hw_samples_mixed
) tb = sw->total_hw_samples_mixed; ((ta)>(tb)?(tb):(ta)
); }));
981 nb_live += 1;
982 }
983 }
984
985 *nb_livep = nb_live;
986 return m;
987}
988
989static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
990{
991 int smin;
992 int nb_live1;
993
994 smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
995 if (nb_live) {
996 *nb_live = nb_live1;
997 }
998
999 if (nb_live1) {
1000 int live = smin;
1001
1002 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > hw->samples)) {
1003 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1004 return 0;
1005 }
1006 return live;
1007 }
1008 return 0;
1009}
1010
1011/*
1012 * Soft voice (playback)
1013 */
1014int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1015{
1016 int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1017 int ret = 0, pos = 0, total = 0;
1018
1019 if (!sw) {
1020 return size;
1021 }
1022
1023 hwsamples = sw->hw->samples;
1024
1025 live = sw->total_hw_samples_mixed;
1026 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > hwsamples)){
1027 dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1028 return 0;
1029 }
1030
1031 if (live == hwsamples) {
1032#ifdef DEBUG_OUT
1033 dolog ("%s is full %d\n", sw->name, live);
1034#endif
1035 return 0;
1036 }
1037
1038 wpos = (sw->hw->rpos + live) % hwsamples;
1039 samples = size >> sw->info.shift;
1040
1041 dead = hwsamples - live;
1042 swlim = ((int64_t) dead << 32) / sw->ratio;
1043 swlim = audio_MIN (swlim, samples)( __extension__ ({ __typeof (swlim) ta = swlim; __typeof (samples
) tb = samples; ((ta)>(tb)?(tb):(ta)); }));
1044 if (swlim) {
1045 sw->conv (sw->buf, buf, swlim);
1046
1047 if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP(1 << 3))) {
1048 mixeng_volume (sw->buf, swlim, &sw->vol);
1049 }
1050 }
1051
1052 while (swlim) {
1053 dead = hwsamples - live;
1054 left = hwsamples - wpos;
1055 blck = audio_MIN (dead, left)( __extension__ ({ __typeof (dead) ta = dead; __typeof (left)
tb = left; ((ta)>(tb)?(tb):(ta)); }));
1056 if (!blck) {
1057 break;
1058 }
1059 isamp = swlim;
1060 osamp = blck;
1061 st_rate_flow_mix (
1062 sw->rate,
1063 sw->buf + pos,
1064 sw->hw->mix_buf + wpos,
1065 &isamp,
1066 &osamp
1067 );
1068 ret += isamp;
1069 swlim -= isamp;
1070 pos += isamp;
1071 live += osamp;
1072 wpos = (wpos + osamp) % hwsamples;
1073 total += osamp;
1074 }
1075
1076 sw->total_hw_samples_mixed += total;
1077 sw->empty = sw->total_hw_samples_mixed == 0;
1078
1079#ifdef DEBUG_OUT
1080 dolog (
1081 "%s: write size %d ret %d total sw %d\n",
1082 SW_NAME (sw)(sw)->name ? (sw)->name : "unknown",
1083 size >> sw->info.shift,
1084 ret,
1085 sw->total_hw_samples_mixed
1086 );
1087#endif
1088
1089 return ret << sw->info.shift;
1090}
1091
1092#ifdef DEBUG_AUDIO
1093static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1094{
1095 dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1096 cap, info->bits, info->sign, info->freq, info->nchannels);
1097}
1098#endif
1099
1100#define DAC
1101#include "audio_template.h"
1102#undef DAC
1103#include "audio_template.h"
1104
1105/*
1106 * Timer
1107 */
1108static int audio_is_timer_needed (void)
1109{
1110 HWVoiceIn *hwi = NULL((void*)0);
1111 HWVoiceOut *hwo = NULL((void*)0);
1112
1113 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1114 if (!hwo->poll_mode) return 1;
1115 }
1116 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1117 if (!hwi->poll_mode) return 1;
1118 }
1119 return 0;
1120}
1121
1122static void audio_reset_timer (AudioState *s)
1123{
1124 if (audio_is_timer_needed ()) {
1125 qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + 1);
1126 }
1127 else {
1128 qemu_del_timer (s->ts);
1129 }
1130}
1131
1132static void audio_timer (void *opaque)
1133{
1134 audio_run ("timer");
1135 audio_reset_timer (opaque);
1136}
1137
1138/*
1139 * Public API
1140 */
1141int AUD_write (SWVoiceOut *sw, void *buf, int size)
1142{
1143 int bytes;
1144
1145 if (!sw) {
1146 /* XXX: Consider options */
1147 return size;
1148 }
1149
1150 if (!sw->hw->enabled) {
1151 dolog ("Writing to disabled voice %s\n", SW_NAME (sw)(sw)->name ? (sw)->name : "unknown");
1152 return 0;
1153 }
1154
1155 bytes = sw->hw->pcm_ops->write (sw, buf, size);
1156 return bytes;
1157}
1158
1159int AUD_read (SWVoiceIn *sw, void *buf, int size)
1160{
1161 int bytes;
1162
1163 if (!sw) {
1164 /* XXX: Consider options */
1165 return size;
1166 }
1167
1168 if (!sw->hw->enabled) {
1169 dolog ("Reading from disabled voice %s\n", SW_NAME (sw)(sw)->name ? (sw)->name : "unknown");
1170 return 0;
1171 }
1172
1173 bytes = sw->hw->pcm_ops->read (sw, buf, size);
1174 return bytes;
1175}
1176
1177int AUD_get_buffer_size_out (SWVoiceOut *sw)
1178{
1179 return sw->hw->samples << sw->hw->info.shift;
1180}
1181
1182void AUD_set_active_out (SWVoiceOut *sw, int on)
1183{
1184 HWVoiceOut *hw;
1185
1186 if (!sw) {
1187 return;
1188 }
1189
1190 hw = sw->hw;
1191 if (sw->active != on) {
1192 AudioState *s = &glob_audio_state;
1193 SWVoiceOut *temp_sw;
1194 SWVoiceCap *sc;
1195
1196 if (on) {
1197 hw->pending_disable = 0;
1198 if (!hw->enabled) {
1199 hw->enabled = 1;
1200 if (s->vm_running) {
1201 hw->pcm_ops->ctl_out (hw, VOICE_ENABLE1, conf.try_poll_out);
1202 audio_reset_timer (s);
1203 }
1204 }
1205 }
1206 else {
1207 if (hw->enabled) {
1208 int nb_active = 0;
1209
1210 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1211 temp_sw = temp_sw->entries.le_next) {
1212 nb_active += temp_sw->active != 0;
1213 }
1214
1215 hw->pending_disable = nb_active == 1;
1216 }
1217 }
1218
1219 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1220 sc->sw.active = hw->enabled;
1221 if (hw->enabled) {
1222 audio_capture_maybe_changed (sc->cap, 1);
1223 }
1224 }
1225 sw->active = on;
1226 }
1227}
1228
1229void AUD_set_active_in (SWVoiceIn *sw, int on)
1230{
1231 HWVoiceIn *hw;
1232
1233 if (!sw) {
1234 return;
1235 }
1236
1237 hw = sw->hw;
1238 if (sw->active != on) {
1239 AudioState *s = &glob_audio_state;
1240 SWVoiceIn *temp_sw;
1241
1242 if (on) {
1243 if (!hw->enabled) {
1244 hw->enabled = 1;
1245 if (s->vm_running) {
1246 hw->pcm_ops->ctl_in (hw, VOICE_ENABLE1, conf.try_poll_in);
1247 audio_reset_timer (s);
1248 }
1249 }
1250 sw->total_hw_samples_acquired = hw->total_samples_captured;
1251 }
1252 else {
1253 if (hw->enabled) {
1254 int nb_active = 0;
1255
1256 for (temp_sw = hw->sw_head.lh_first; temp_sw;
1257 temp_sw = temp_sw->entries.le_next) {
1258 nb_active += temp_sw->active != 0;
1259 }
1260
1261 if (nb_active == 1) {
1262 hw->enabled = 0;
1263 hw->pcm_ops->ctl_in (hw, VOICE_DISABLE2);
1264 }
1265 }
1266 }
1267 sw->active = on;
1268 }
1269}
1270
1271static int audio_get_avail (SWVoiceIn *sw)
1272{
1273 int live;
1274
1275 if (!sw) {
1276 return 0;
1277 }
1278
1279 live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1280 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > sw->hw->samples)) {
1281 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1282 return 0;
1283 }
1284
1285 ldebug (
1286 "%s: get_avail live %d ret %" PRId64"l" "d" "\n",
1287 SW_NAME (sw)(sw)->name ? (sw)->name : "unknown",
1288 live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1289 );
1290
1291 return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1292}
1293
1294static int audio_get_free (SWVoiceOut *sw)
1295{
1296 int live, dead;
1297
1298 if (!sw) {
1299 return 0;
1300 }
1301
1302 live = sw->total_hw_samples_mixed;
1303
1304 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > sw->hw->samples)) {
1305 dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1306 return 0;
1307 }
1308
1309 dead = sw->hw->samples - live;
1310
1311#ifdef DEBUG_OUT
1312 dolog ("%s: get_free live %d dead %d ret %" PRId64"l" "d" "\n",
1313 SW_NAME (sw)(sw)->name ? (sw)->name : "unknown",
1314 live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1315#endif
1316
1317 return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1318}
1319
1320static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1321{
1322 int n;
1323
1324 if (hw->enabled) {
1325 SWVoiceCap *sc;
1326
1327 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1328 SWVoiceOut *sw = &sc->sw;
1329 int rpos2 = rpos;
1330
1331 n = samples;
1332 while (n) {
1333 int till_end_of_hw = hw->samples - rpos2;
1334 int to_write = audio_MIN (till_end_of_hw, n)( __extension__ ({ __typeof (till_end_of_hw) ta = till_end_of_hw
; __typeof (n) tb = n; ((ta)>(tb)?(tb):(ta)); }));
1335 int bytes = to_write << hw->info.shift;
1336 int written;
1337
1338 sw->buf = hw->mix_buf + rpos2;
1339 written = audio_pcm_sw_write (sw, NULL((void*)0), bytes);
1340 if (written - bytes) {
1341 dolog ("Could not mix %d bytes into a capture "
1342 "buffer, mixed %d\n",
1343 bytes, written);
1344 break;
1345 }
1346 n -= to_write;
1347 rpos2 = (rpos2 + to_write) % hw->samples;
1348 }
1349 }
1350 }
1351
1352 n = audio_MIN (samples, hw->samples - rpos)( __extension__ ({ __typeof (samples) ta = samples; __typeof (
hw->samples - rpos) tb = hw->samples - rpos; ((ta)>(
tb)?(tb):(ta)); }));
1353 mixeng_clear (hw->mix_buf + rpos, n);
1354 mixeng_clear (hw->mix_buf, samples - n);
1355}
1356
1357static void audio_run_out (AudioState *s)
1358{
1359 HWVoiceOut *hw = NULL((void*)0);
1360 SWVoiceOut *sw;
1361
1362 while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1363 int played;
1364 int live, free, nb_live, cleanup_required, prev_rpos;
1365
1366 live = audio_pcm_hw_get_live_out (hw, &nb_live);
1367 if (!nb_live) {
1368 live = 0;
1369 }
1370
1371 if (audio_bug (AUDIO_FUNC__FUNCTION__, live < 0 || live > hw->samples)) {
1372 dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1373 continue;
1374 }
1375
1376 if (hw->pending_disable && !nb_live) {
1377 SWVoiceCap *sc;
1378#ifdef DEBUG_OUT
1379 dolog ("Disabling voice\n");
1380#endif
1381 hw->enabled = 0;
1382 hw->pending_disable = 0;
1383 hw->pcm_ops->ctl_out (hw, VOICE_DISABLE2);
1384 for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1385 sc->sw.active = 0;
1386 audio_recalc_and_notify_capture (sc->cap);
1387 }
1388 continue;
1389 }
1390
1391 if (!live) {
1392 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1393 if (sw->active) {
1394 free = audio_get_free (sw);
1395 if (free > 0) {
1396 sw->callback.fn (sw->callback.opaque, free);
1397 }
1398 }
1399 }
1400 continue;
1401 }
1402
1403 prev_rpos = hw->rpos;
1404 played = hw->pcm_ops->run_out (hw, live);
1405 if (audio_bug (AUDIO_FUNC__FUNCTION__, hw->rpos >= hw->samples)) {
1406 dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1407 hw->rpos, hw->samples, played);
1408 hw->rpos = 0;
1409 }
1410
1411#ifdef DEBUG_OUT
1412 dolog ("played=%d\n", played);
1413#endif
1414
1415 if (played) {
1416 hw->ts_helper += played;
1417 audio_capture_mix_and_clear (hw, prev_rpos, played);
1418 }
1419
1420 cleanup_required = 0;
1421 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1422 if (!sw->active && sw->empty) {
1423 continue;
1424 }
1425
1426 if (audio_bug (AUDIO_FUNC__FUNCTION__, played > sw->total_hw_samples_mixed)) {
1427 dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1428 played, sw->total_hw_samples_mixed);
1429 played = sw->total_hw_samples_mixed;
1430 }
1431
1432 sw->total_hw_samples_mixed -= played;
1433
1434 if (!sw->total_hw_samples_mixed) {
1435 sw->empty = 1;
1436 cleanup_required |= !sw->active && !sw->callback.fn;
1437 }
1438
1439 if (sw->active) {
1440 free = audio_get_free (sw);
1441 if (free > 0) {
1442 sw->callback.fn (sw->callback.opaque, free);
1443 }
1444 }
1445 }
1446
1447 if (cleanup_required) {
1448 SWVoiceOut *sw1;
1449
1450 sw = hw->sw_head.lh_first;
1451 while (sw) {
1452 sw1 = sw->entries.le_next;
1453 if (!sw->active && !sw->callback.fn) {
1454#ifdef DEBUG_PLIVE
1455 dolog ("Finishing with old voice\n");
1456#endif
1457 audio_close_out (sw);
1458 }
1459 sw = sw1;
1460 }
1461 }
1462 }
1463}
1464
1465static void audio_run_in (AudioState *s)
1466{
1467 HWVoiceIn *hw = NULL((void*)0);
1468
1469 while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1470 SWVoiceIn *sw;
1471 int captured, min;
1472
1473 captured = hw->pcm_ops->run_in (hw);
1474
1475 min = audio_pcm_hw_find_min_in (hw);
1476 hw->total_samples_captured += captured - min;
1477 hw->ts_helper += captured;
1478
1479 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1480 sw->total_hw_samples_acquired -= min;
1481
1482 if (sw->active) {
1483 int avail;
1484
1485 avail = audio_get_avail (sw);
1486 if (avail > 0) {
1487 sw->callback.fn (sw->callback.opaque, avail);
1488 }
1489 }
1490 }
1491 }
1492}
1493
1494static void audio_run_capture (AudioState *s)
1495{
1496 CaptureVoiceOut *cap;
1497
1498 for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1499 int live, rpos, captured;
1500 HWVoiceOut *hw = &cap->hw;
1501 SWVoiceOut *sw;
1502
1503 captured = live = audio_pcm_hw_get_live_out (hw, NULL((void*)0));
1504 rpos = hw->rpos;
1505 while (live) {
1506 int left = hw->samples - rpos;
1507 int to_capture = audio_MIN (live, left)( __extension__ ({ __typeof (live) ta = live; __typeof (left)
tb = left; ((ta)>(tb)?(tb):(ta)); }));
1508 struct st_sample *src;
1509 struct capture_callback *cb;
1510
1511 src = hw->mix_buf + rpos;
1512 hw->clip (cap->buf, src, to_capture);
1513 mixeng_clear (src, to_capture);
1514
1515 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1516 cb->ops.capture (cb->opaque, cap->buf,
1517 to_capture << hw->info.shift);
1518 }
1519 rpos = (rpos + to_capture) % hw->samples;
1520 live -= to_capture;
1521 }
1522 hw->rpos = rpos;
1523
1524 for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1525 if (!sw->active && sw->empty) {
1526 continue;
1527 }
1528
1529 if (audio_bug (AUDIO_FUNC__FUNCTION__, captured > sw->total_hw_samples_mixed)) {
1530 dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1531 captured, sw->total_hw_samples_mixed);
1532 captured = sw->total_hw_samples_mixed;
1533 }
1534
1535 sw->total_hw_samples_mixed -= captured;
1536 sw->empty = sw->total_hw_samples_mixed == 0;
1537 }
1538 }
1539}
1540
1541void audio_run (const char *msg)
1542{
1543 AudioState *s = &glob_audio_state;
1544
1545 audio_run_out (s);
1546 audio_run_in (s);
1547 audio_run_capture (s);
1548#ifdef DEBUG_POLL
1549 {
1550 static double prevtime;
1551 double currtime;
1552 struct timeval tv;
1553
1554 if (gettimeofday (&tv, NULL((void*)0))) {
1555 perror ("audio_run: gettimeofday");
1556 return;
1557 }
1558
1559 currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1560 dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1561 prevtime = currtime;
1562 }
1563#endif
1564}
1565
1566static struct audio_option audio_options[] = {
1567 /* DAC */
1568 {
1569 .name = "DAC_FIXED_SETTINGS",
1570 .tag = AUD_OPT_BOOL,
1571 .valp = &conf.fixed_out.enabled,
1572 .descr = "Use fixed settings for host DAC"
1573 },
1574 {
1575 .name = "DAC_FIXED_FREQ",
1576 .tag = AUD_OPT_INT,
1577 .valp = &conf.fixed_out.settings.freq,
1578 .descr = "Frequency for fixed host DAC"
1579 },
1580 {
1581 .name = "DAC_FIXED_FMT",
1582 .tag = AUD_OPT_FMT,
1583 .valp = &conf.fixed_out.settings.fmt,
1584 .descr = "Format for fixed host DAC"
1585 },
1586 {
1587 .name = "DAC_FIXED_CHANNELS",
1588 .tag = AUD_OPT_INT,
1589 .valp = &conf.fixed_out.settings.nchannels,
1590 .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1591 },
1592 {
1593 .name = "DAC_VOICES",
1594 .tag = AUD_OPT_INT,
1595 .valp = &conf.fixed_out.nb_voices,
1596 .descr = "Number of voices for DAC"
1597 },
1598 {
1599 .name = "DAC_TRY_POLL",
1600 .tag = AUD_OPT_BOOL,
1601 .valp = &conf.try_poll_out,
1602 .descr = "Attempt using poll mode for DAC"
1603 },
1604 /* ADC */
1605 {
1606 .name = "ADC_FIXED_SETTINGS",
1607 .tag = AUD_OPT_BOOL,
1608 .valp = &conf.fixed_in.enabled,
1609 .descr = "Use fixed settings for host ADC"
1610 },
1611 {
1612 .name = "ADC_FIXED_FREQ",
1613 .tag = AUD_OPT_INT,
1614 .valp = &conf.fixed_in.settings.freq,
1615 .descr = "Frequency for fixed host ADC"
1616 },
1617 {
1618 .name = "ADC_FIXED_FMT",
1619 .tag = AUD_OPT_FMT,
1620 .valp = &conf.fixed_in.settings.fmt,
1621 .descr = "Format for fixed host ADC"
1622 },
1623 {
1624 .name = "ADC_FIXED_CHANNELS",
1625 .tag = AUD_OPT_INT,
1626 .valp = &conf.fixed_in.settings.nchannels,
1627 .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1628 },
1629 {
1630 .name = "ADC_VOICES",
1631 .tag = AUD_OPT_INT,
1632 .valp = &conf.fixed_in.nb_voices,
1633 .descr = "Number of voices for ADC"
1634 },
1635 {
1636 .name = "ADC_TRY_POLL",
1637 .tag = AUD_OPT_BOOL,
1638 .valp = &conf.try_poll_in,
1639 .descr = "Attempt using poll mode for ADC"
1640 },
1641 /* Misc */
1642 {
1643 .name = "TIMER_PERIOD",
1644 .tag = AUD_OPT_INT,
1645 .valp = &conf.period.hertz,
1646 .descr = "Timer period in HZ (0 - use lowest possible)"
1647 },
1648 {
1649 .name = "PLIVE",
1650 .tag = AUD_OPT_BOOL,
1651 .valp = &conf.plive,
1652 .descr = "(undocumented)"
1653 },
1654 {
1655 .name = "LOG_TO_MONITOR",
1656 .tag = AUD_OPT_BOOL,
1657 .valp = &conf.log_to_monitor,
1658 .descr = "Print logging messages to monitor instead of stderr"
1659 },
1660 { /* End of list */ }
1661};
1662
1663static void audio_pp_nb_voices (const char *typ, int nb)
1664{
1665 switch (nb) {
1666 case 0:
1667 printf ("Does not support %s\n", typ);
1668 break;
1669 case 1:
1670 printf ("One %s voice\n", typ);
1671 break;
1672 case INT_MAX2147483647:
1673 printf ("Theoretically supports many %s voices\n", typ);
1674 break;
1675 default:
1676 printf ("Theoretically supports up to %d %s voices\n", nb, typ);
1677 break;
1678 }
1679
1680}
1681
1682void AUD_help (void)
1683{
1684 size_t i;
1685
1686 audio_process_options ("AUDIO", audio_options);
1687 for (i = 0; i < ARRAY_SIZE (drvtab)(sizeof(drvtab) / sizeof((drvtab)[0])); i++) {
1688 struct audio_driver *d = drvtab[i];
1689 if (d->options) {
1690 audio_process_options (d->name, d->options);
1691 }
1692 }
1693
1694 printf ("Audio options:\n");
1695 audio_print_options ("AUDIO", audio_options);
1696 printf ("\n");
1697
1698 printf ("Available drivers:\n");
1699
1700 for (i = 0; i < ARRAY_SIZE (drvtab)(sizeof(drvtab) / sizeof((drvtab)[0])); i++) {
1701 struct audio_driver *d = drvtab[i];
1702
1703 printf ("Name: %s\n", d->name);
1704 printf ("Description: %s\n", d->descr);
1705
1706 audio_pp_nb_voices ("playback", d->max_voices_out);
1707 audio_pp_nb_voices ("capture", d->max_voices_in);
1708
1709 if (d->options) {
1710 printf ("Options:\n");
1711 audio_print_options (d->name, d->options);
1712 }
1713 else {
1714 printf ("No options\n");
1715 }
1716 printf ("\n");
1717 }
1718
1719 printf (
1720 "Options are settable through environment variables.\n"
1721 "Example:\n"
1722#ifdef _WIN32
1723 " set QEMU_AUDIO_DRV=wav\n"
1724 " set QEMU_WAV_PATH=c:\\tune.wav\n"
1725#else
1726 " export QEMU_AUDIO_DRV=wav\n"
1727 " export QEMU_WAV_PATH=$HOME/tune.wav\n"
1728 "(for csh replace export with setenv in the above)\n"
1729#endif
1730 " qemu ...\n\n"
1731 );
1732}
1733
1734static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1735{
1736 if (drv->options) {
1737 audio_process_options (drv->name, drv->options);
1738 }
1739 s->drv_opaque = drv->init ();
1740
1741 if (s->drv_opaque) {
1742 audio_init_nb_voices_out (drv);
1743 audio_init_nb_voices_in (drv);
1744 s->drv = drv;
1745 return 0;
1746 }
1747 else {
1748 dolog ("Could not init `%s' audio driver\n", drv->name);
1749 return -1;
1750 }
1751}
1752
1753static void audio_vm_change_state_handler (void *opaque, int running,
1754 RunState state)
1755{
1756 AudioState *s = opaque;
1757 HWVoiceOut *hwo = NULL((void*)0);
1758 HWVoiceIn *hwi = NULL((void*)0);
1759 int op = running ? VOICE_ENABLE1 : VOICE_DISABLE2;
1760
1761 s->vm_running = running;
1762 while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1763 hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1764 }
1765
1766 while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1767 hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1768 }
1769 audio_reset_timer (s);
1770}
1771
1772static void audio_atexit (void)
1773{
1774 AudioState *s = &glob_audio_state;
1775 HWVoiceOut *hwo = NULL((void*)0);
1776 HWVoiceIn *hwi = NULL((void*)0);
1777
1778 while ((hwo = audio_pcm_hw_find_any_out (hwo))) {
1779 SWVoiceCap *sc;
1780
1781 if (hwo->enabled) {
1782 hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE2);
1783 }
1784 hwo->pcm_ops->fini_out (hwo);
1785
1786 for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1787 CaptureVoiceOut *cap = sc->cap;
1788 struct capture_callback *cb;
1789
1790 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1791 cb->ops.destroy (cb->opaque);
1792 }
1793 }
1794 }
1795
1796 while ((hwi = audio_pcm_hw_find_any_in (hwi))) {
1797 if (hwi->enabled) {
1798 hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE2);
1799 }
1800 hwi->pcm_ops->fini_in (hwi);
1801 }
1802
1803 if (s->drv) {
1804 s->drv->fini (s->drv_opaque);
1805 }
1806}
1807
1808static const VMStateDescription vmstate_audio = {
1809 .name = "audio",
1810 .version_id = 1,
1811 .minimum_version_id = 1,
1812 .minimum_version_id_old = 1,
1813 .fields = (VMStateField []) {
1814 VMSTATE_END_OF_LIST(){}
1815 }
1816};
1817
1818static void audio_init (void)
1819{
1820 size_t i;
1821 int done = 0;
1822 const char *drvname;
1823 VMChangeStateEntry *e;
1824 AudioState *s = &glob_audio_state;
1825
1826 if (s->drv) {
1827 return;
1828 }
1829
1830 QLIST_INIT (&s->hw_head_out)do { (&s->hw_head_out)->lh_first = ((void*)0); } while
( 0);
1831 QLIST_INIT (&s->hw_head_in)do { (&s->hw_head_in)->lh_first = ((void*)0); } while
( 0);
1832 QLIST_INIT (&s->cap_head)do { (&s->cap_head)->lh_first = ((void*)0); } while
( 0);
1833 atexit (audio_atexit);
1834
1835 s->ts = qemu_new_timer_ns (vm_clock, audio_timer, s);
1836 if (!s->ts) {
1837 hw_error("Could not create audio timer\n");
1838 }
1839
1840 audio_process_options ("AUDIO", audio_options);
1841
1842 s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1843 s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1844
1845 if (s->nb_hw_voices_out <= 0) {
1846 dolog ("Bogus number of playback voices %d, setting to 1\n",
1847 s->nb_hw_voices_out);
1848 s->nb_hw_voices_out = 1;
1849 }
1850
1851 if (s->nb_hw_voices_in <= 0) {
1852 dolog ("Bogus number of capture voices %d, setting to 0\n",
1853 s->nb_hw_voices_in);
1854 s->nb_hw_voices_in = 0;
1855 }
1856
1857 {
1858 int def;
1859 drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL((void*)0), &def);
1860 }
1861
1862 if (drvname) {
1863 int found = 0;
1864
1865 for (i = 0; i < ARRAY_SIZE (drvtab)(sizeof(drvtab) / sizeof((drvtab)[0])); i++) {
1866 if (!strcmp (drvname, drvtab[i]->name)) {
1867 done = !audio_driver_init (s, drvtab[i]);
1868 found = 1;
1869 break;
1870 }
1871 }
1872
1873 if (!found) {
1874 dolog ("Unknown audio driver `%s'\n", drvname);
1875 dolog ("Run with -audio-help to list available drivers\n");
1876 }
1877 }
1878
1879 if (!done) {
1880 for (i = 0; !done && i < ARRAY_SIZE (drvtab)(sizeof(drvtab) / sizeof((drvtab)[0])); i++) {
1881 if (drvtab[i]->can_be_default) {
1882 done = !audio_driver_init (s, drvtab[i]);
1883 }
1884 }
1885 }
1886
1887 if (!done) {
1888 done = !audio_driver_init (s, &no_audio_driver);
1889 if (!done) {
1890 hw_error("Could not initialize audio subsystem\n");
1891 }
1892 else {
1893 dolog ("warning: Using timer based audio emulation\n");
1894 }
1895 }
1896
1897 if (conf.period.hertz <= 0) {
1898 if (conf.period.hertz < 0) {
1899 dolog ("warning: Timer period is negative - %d "
1900 "treating as zero\n",
1901 conf.period.hertz);
1902 }
1903 conf.period.ticks = 1;
1904 } else {
1905 conf.period.ticks =
1906 muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
1907 }
1908
1909 e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
1910 if (!e) {
1911 dolog ("warning: Could not register change state handler\n"
1912 "(Audio can continue looping even after stopping the VM)\n");
1913 }
1914
1915 QLIST_INIT (&s->card_head)do { (&s->card_head)->lh_first = ((void*)0); } while
( 0);
1916 vmstate_register (NULL((void*)0), 0, &vmstate_audio, s);
1917}
1918
1919void AUD_register_card (const char *name, QEMUSoundCard *card)
1920{
1921 audio_init ();
1922 card->name = g_strdup (name);
1923 memset (&card->entries, 0, sizeof (card->entries));
1924 QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries)do { if (((card)->entries.le_next = (&glob_audio_state
.card_head)->lh_first) != ((void*)0)) (&glob_audio_state
.card_head)->lh_first->entries.le_prev = &(card)->
entries.le_next; (&glob_audio_state.card_head)->lh_first
= (card); (card)->entries.le_prev = &(&glob_audio_state
.card_head)->lh_first; } while ( 0);
1925}
1926
1927void AUD_remove_card (QEMUSoundCard *card)
1928{
1929 QLIST_REMOVE (card, entries)do { if ((card)->entries.le_next != ((void*)0)) (card)->
entries.le_next->entries.le_prev = (card)->entries.le_prev
; *(card)->entries.le_prev = (card)->entries.le_next; }
while ( 0);
1930 g_free (card->name);
1931}
1932
1933
1934CaptureVoiceOut *AUD_add_capture (
1935 struct audsettings *as,
1936 struct audio_capture_ops *ops,
1937 void *cb_opaque
1938 )
1939{
1940 AudioState *s = &glob_audio_state;
1941 CaptureVoiceOut *cap;
1942 struct capture_callback *cb;
1943
1944 if (audio_validate_settings (as)) {
1945 dolog ("Invalid settings were passed when trying to add capture\n");
1946 audio_print_settings (as);
1947 goto err0;
1948 }
1949
1950 cb = audio_calloc (AUDIO_FUNC__FUNCTION__, 1, sizeof (*cb));
1951 if (!cb) {
1952 dolog ("Could not allocate capture callback information, size %zu\n",
1953 sizeof (*cb));
1954 goto err0;
1955 }
1956 cb->ops = *ops;
1957 cb->opaque = cb_opaque;
1958
1959 cap = audio_pcm_capture_find_specific (as);
1960 if (cap) {
1961 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries)do { if (((cb)->entries.le_next = (&cap->cb_head)->
lh_first) != ((void*)0)) (&cap->cb_head)->lh_first->
entries.le_prev = &(cb)->entries.le_next; (&cap->
cb_head)->lh_first = (cb); (cb)->entries.le_prev = &
(&cap->cb_head)->lh_first; } while ( 0);
1962 return cap;
1963 }
1964 else {
1965 HWVoiceOut *hw;
1966 CaptureVoiceOut *cap;
1967
1968 cap = audio_calloc (AUDIO_FUNC__FUNCTION__, 1, sizeof (*cap));
1969 if (!cap) {
1970 dolog ("Could not allocate capture voice, size %zu\n",
1971 sizeof (*cap));
1972 goto err1;
1973 }
1974
1975 hw = &cap->hw;
1976 QLIST_INIT (&hw->sw_head)do { (&hw->sw_head)->lh_first = ((void*)0); } while
( 0);
1977 QLIST_INIT (&cap->cb_head)do { (&cap->cb_head)->lh_first = ((void*)0); } while
( 0);
1978
1979 /* XXX find a more elegant way */
1980 hw->samples = 4096 * 4;
1981 hw->mix_buf = audio_calloc (AUDIO_FUNC__FUNCTION__, hw->samples,
1982 sizeof (struct st_sample));
1983 if (!hw->mix_buf) {
1984 dolog ("Could not allocate capture mix buffer (%d samples)\n",
1985 hw->samples);
1986 goto err2;
1987 }
1988
1989 audio_pcm_init_info (&hw->info, as);
1990
1991 cap->buf = audio_calloc (AUDIO_FUNC__FUNCTION__, hw->samples, 1 << hw->info.shift);
1992 if (!cap->buf) {
1993 dolog ("Could not allocate capture buffer "
1994 "(%d samples, each %d bytes)\n",
1995 hw->samples, 1 << hw->info.shift);
1996 goto err3;
1997 }
1998
1999 hw->clip = mixeng_clip
2000 [hw->info.nchannels == 2]
2001 [hw->info.sign]
2002 [hw->info.swap_endianness]
2003 [audio_bits_to_index (hw->info.bits)];
2004
2005 QLIST_INSERT_HEAD (&s->cap_head, cap, entries)do { if (((cap)->entries.le_next = (&s->cap_head)->
lh_first) != ((void*)0)) (&s->cap_head)->lh_first->
entries.le_prev = &(cap)->entries.le_next; (&s->
cap_head)->lh_first = (cap); (cap)->entries.le_prev = &
(&s->cap_head)->lh_first; } while ( 0);
2006 QLIST_INSERT_HEAD (&cap->cb_head, cb, entries)do { if (((cb)->entries.le_next = (&cap->cb_head)->
lh_first) != ((void*)0)) (&cap->cb_head)->lh_first->
entries.le_prev = &(cb)->entries.le_next; (&cap->
cb_head)->lh_first = (cb); (cb)->entries.le_prev = &
(&cap->cb_head)->lh_first; } while ( 0);
2007
2008 hw = NULL((void*)0);
2009 while ((hw = audio_pcm_hw_find_any_out (hw))) {
2010 audio_attach_capture (hw);
2011 }
2012 return cap;
2013
2014 err3:
2015 g_free (cap->hw.mix_buf);
2016 err2:
2017 g_free (cap);
2018 err1:
2019 g_free (cb);
2020 err0:
2021 return NULL((void*)0);
2022 }
2023}
2024
2025void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2026{
2027 struct capture_callback *cb;
2028
2029 for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2030 if (cb->opaque == cb_opaque) {
2031 cb->ops.destroy (cb_opaque);
2032 QLIST_REMOVE (cb, entries)do { if ((cb)->entries.le_next != ((void*)0)) (cb)->entries
.le_next->entries.le_prev = (cb)->entries.le_prev; *(cb
)->entries.le_prev = (cb)->entries.le_next; } while ( 0
);
2033 g_free (cb);
2034
2035 if (!cap->cb_head.lh_first) {
2036 SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2037
2038 while (sw) {
2039 SWVoiceCap *sc = (SWVoiceCap *) sw;
2040#ifdef DEBUG_CAPTURE
2041 dolog ("freeing %s\n", sw->name);
2042#endif
2043
2044 sw1 = sw->entries.le_next;
2045 if (sw->rate) {
2046 st_rate_stop (sw->rate);
2047 sw->rate = NULL((void*)0);
2048 }
2049 QLIST_REMOVE (sw, entries)do { if ((sw)->entries.le_next != ((void*)0)) (sw)->entries
.le_next->entries.le_prev = (sw)->entries.le_prev; *(sw
)->entries.le_prev = (sw)->entries.le_next; } while ( 0
);
2050 QLIST_REMOVE (sc, entries)do { if ((sc)->entries.le_next != ((void*)0)) (sc)->entries
.le_next->entries.le_prev = (sc)->entries.le_prev; *(sc
)->entries.le_prev = (sc)->entries.le_next; } while ( 0
);
2051 g_free (sc);
2052 sw = sw1;
2053 }
2054 QLIST_REMOVE (cap, entries)do { if ((cap)->entries.le_next != ((void*)0)) (cap)->entries
.le_next->entries.le_prev = (cap)->entries.le_prev; *(cap
)->entries.le_prev = (cap)->entries.le_next; } while ( 0
);
2055 g_free (cap);
2056 }
2057 return;
2058 }
2059 }
2060}
2061
2062void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2063{
2064 if (sw) {
2065 HWVoiceOut *hw = sw->hw;
2066
2067 sw->vol.mute = mute;
2068 sw->vol.l = nominal_volume.l * lvol / 255;
2069 sw->vol.r = nominal_volume.r * rvol / 255;
2070
2071 if (hw->pcm_ops->ctl_out) {
2072 hw->pcm_ops->ctl_out (hw, VOICE_VOLUME3, sw);
2073 }
2074 }
2075}
2076
2077void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2078{
2079 if (sw) {
2080 HWVoiceIn *hw = sw->hw;
2081
2082 sw->vol.mute = mute;
2083 sw->vol.l = nominal_volume.l * lvol / 255;
2084 sw->vol.r = nominal_volume.r * rvol / 255;
2085
2086 if (hw->pcm_ops->ctl_in) {
2087 hw->pcm_ops->ctl_in (hw, VOICE_VOLUME3, sw);
2088 }
2089 }
2090}