audio.c@ 1824

最後變更在這個檔案從1824是 1551,由 vboxsync 提交於 18 年前
Mac OS X audio support (only playback).
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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	#define LOG_GROUP LOG_GROUP_DEV_AUDIO
25	#include <VBox/pdm.h>
26	#include <VBox/err.h>
27	#include <VBox/mm.h>
28
29	#include <VBox/log.h>
30	#include <iprt/assert.h>
31	#include <iprt/uuid.h>
32	#include <iprt/string.h>
33	#include <iprt/alloc.h>
34
35	#include "Builtins.h"
36	#include "../../vl_vbox.h"
37
38	#include <ctype.h>
39	#include <stdlib.h>
40
41	#define AUDIO_CAP "audio"
42	#include "audio.h"
43	#include "audio_int.h"
44
45	#ifdef __WIN__
46	#define strcasecmp stricmp
47	#endif
48
49	/* #define DEBUG_PLIVE */
50	/* #define DEBUG_LIVE */
51	/* #define DEBUG_OUT */
52	/* #define DEBUG_CAPTURE */
53
54	#define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
55
56	typedef struct DRVAUDIO
57	{
58	/** The audio interface. */
59	PDMIAUDIOCONNECTOR IAudioConnector;
60	/** Pointer to the driver instance. */
61	PPDMDRVINS pDrvIns;
62	} DRVAUDIO, *PDRVAUDIO;
63
64	static struct audio_driver *drvtab[] = {
65	#ifdef __LINUX__
66	&oss_audio_driver,
67	#ifdef VBOX_WITH_ALSA
68	&alsa_audio_driver,
69	#endif
70	#endif
71	#ifdef __DARWIN__
72	&coreaudio_audio_driver,
73	#endif
74	#ifdef __WIN__
75	&dsound_audio_driver,
76	#endif
77	#ifdef __L4ENV__
78	&oss_audio_driver,
79	#endif
80	&no_audio_driver
81	};
82
83	struct fixed_settings {
84	int enabled;
85	int nb_voices;
86	int greedy;
87	audsettings_t settings;
88	};
89
90	static struct {
91	struct fixed_settings fixed_out;
92	struct fixed_settings fixed_in;
93	union {
94	int hz;
95	int64_t ticks;
96	} period;
97	int plive;
98	} conf = {
99	{ /* DAC fixed settings */
100	1, /* enabled */
101	1, /* nb_voices */
102	1, /* greedy */
103	{
104	44100, /* freq */
105	2, /* nchannels */
106	AUD_FMT_S16 /* fmt */
107	}
108	},
109
110	{ /* ADC fixed settings */
111	1, /* enabled */
112	1, /* nb_voices */
113	1, /* greedy */
114	{
115	44100, /* freq */
116	2, /* nchannels */
117	AUD_FMT_S16 /* fmt */
118	}
119	},
120
121	{ 100 }, /* period */
122	0, /* plive */
123	};
124
125	static AudioState glob_audio_state;
126
127	volume_t nominal_volume = {
128	0,
129	#ifdef FLOAT_MIXENG
130	1.0,
131	1.0
132	#else
133	#ifndef VBOX
134	UINT_MAX,
135	UINT_MAX
136	#else
137	INT_MAX,
138	INT_MAX
139	#endif
140	#endif
141	};
142
143	#ifdef VBOX
144	volume_t pcm_out_volume =
145	{
146	0,
147	INT_MAX,
148	INT_MAX
149	};
150	volume_t pcm_in_volume =
151	{
152	0,
153	INT_MAX,
154	INT_MAX
155	};
156	#endif
157
158	/* http://www.df.lth.se/~john_e/gems/gem002d.html */
159	/* http://www.multi-platforms.com/Tips/PopCount.htm */
160	uint32_t popcount (uint32_t u)
161	{
162	u = ((u&0x55555555) + ((u>>1)&0x55555555));
163	u = ((u&0x33333333) + ((u>>2)&0x33333333));
164	u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
165	u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
166	u = ( u&0x0000ffff) + (u>>16);
167	return u;
168	}
169
170	inline uint32_t lsbindex (uint32_t u)
171	{
172	return popcount ((u&-u)-1);
173	}
174
175	uint64_t audio_get_clock (void)
176	{
177	AudioState *s;
178
179	s = &glob_audio_state;
180	return s->pDrvIns->pDrvHlp->pfnTMGetVirtualTime (s->pDrvIns);
181	}
182
183	uint64_t audio_get_ticks_per_sec (void)
184	{
185	AudioState *s;
186
187	s = &glob_audio_state;
188	return s->pDrvIns->pDrvHlp->pfnTMGetVirtualFreq (s->pDrvIns);
189	}
190
191	#ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
192	#error No its not
193	#else
194	int audio_bug (const char *funcname, int cond)
195	{
196	if (cond) {
197	static int shown;
198
199	AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
200	if (!shown) {
201	shown = 1;
202	AUD_log (NULL, "Save all your work and restart without audio\n");
203	AUD_log (NULL, "Please send a bug report to InnoTek\n");
204	AUD_log (NULL, "I am sorry\n");
205	}
206	AUD_log (NULL, "Context:\n");
207
208	#if defined AUDIO_BREAKPOINT_ON_BUG
209	# if defined HOST_I386
210	# if defined __GNUC__
211	__asm__ ("int3");
212	# elif defined _MSC_VER
213	_asm _emit 0xcc;
214	# else
215	abort ();
216	# endif
217	# else
218	abort ();
219	# endif
220	#endif
221	}
222
223	return cond;
224	}
225	#endif
226
227	void audio_calloc (const char funcname, int nmemb, size_t size)
228	{
229	int cond;
230	size_t len;
231
232	len = nmemb * size;
233	cond = !nmemb \|\| !size;
234	cond \|= nmemb < 0;
235	cond \|= len < size;
236
237	if (audio_bug ("audio_calloc", cond)) {
238	AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
239	funcname);
240	AUD_log (NULL, "nmemb=%d size=%" FMTZ "u (len=%" FMTZ "u)\n",
241	nmemb, size, len);
242	return NULL;
243	}
244
245	return qemu_mallocz (len);
246	}
247
248	static const char *audio_audfmt_to_string (audfmt_e fmt)
249	{
250	switch (fmt) {
251	case AUD_FMT_U8:
252	return "U8";
253
254	case AUD_FMT_U16:
255	return "U16";
256
257	case AUD_FMT_S8:
258	return "S8";
259
260	case AUD_FMT_S16:
261	return "S16";
262	}
263
264	dolog ("Bogus audfmt %d returning S16\n", fmt);
265	return "S16";
266	}
267
268	static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
269	int *defaultp)
270	{
271	if (!strcasecmp (s, "u8")) {
272	*defaultp = 0;
273	return AUD_FMT_U8;
274	}
275	else if (!strcasecmp (s, "u16")) {
276	*defaultp = 0;
277	return AUD_FMT_U16;
278	}
279	else if (!strcasecmp (s, "s8")) {
280	*defaultp = 0;
281	return AUD_FMT_S8;
282	}
283	else if (!strcasecmp (s, "s16")) {
284	*defaultp = 0;
285	return AUD_FMT_S16;
286	}
287	else {
288	dolog ("Bogus audio format `%s' using %s\n",
289	s, audio_audfmt_to_string (defval));
290	*defaultp = 1;
291	return defval;
292	}
293	}
294
295	static audfmt_e audio_get_conf_fmt (const char *envname,
296	audfmt_e defval,
297	int *defaultp)
298	{
299	const char *var = getenv (envname);
300	if (!var) {
301	*defaultp = 1;
302	return defval;
303	}
304	return audio_string_to_audfmt (var, defval, defaultp);
305	}
306
307	static int audio_get_conf_int (const char key, int defval, int defaultp)
308	{
309	int val;
310	char *strval;
311
312	strval = getenv (key);
313	if (strval) {
314	*defaultp = 0;
315	val = atoi (strval);
316	return val;
317	}
318	else {
319	*defaultp = 1;
320	return defval;
321	}
322	}
323
324	static const char audio_get_conf_str (const char key,
325	const char *defval,
326	int *defaultp)
327	{
328	const char *val = getenv (key);
329	if (!val) {
330	*defaultp = 1;
331	return defval;
332	}
333	else {
334	*defaultp = 0;
335	return val;
336	}
337	}
338
339	void AUD_vlog (const char cap, const char fmt, va_list ap)
340	{
341	if (cap) {
342	Log (("%s: %N", cap, fmt, &ap));
343	}
344	else {
345	Log (("%N", fmt, &ap));
346	}
347	}
348
349	void AUD_log (const char cap, const char fmt, ...)
350	{
351	va_list ap;
352
353	va_start (ap, fmt);
354	AUD_vlog (cap, fmt, ap);
355	va_end (ap);
356	}
357
358	static void audio_process_options (const char *prefix,
359	struct audio_option *opt)
360	{
361	char *optname;
362	const char vbox_prefix[] = "VBOX_";
363	size_t preflen;
364
365	if (audio_bug (AUDIO_FUNC, !prefix)) {
366	dolog ("prefix = NULL\n");
367	return;
368	}
369
370	if (audio_bug (AUDIO_FUNC, !opt)) {
371	dolog ("opt = NULL\n");
372	return;
373	}
374
375	preflen = strlen (prefix);
376
377	for (; opt->name; opt++) {
378	size_t len, i;
379	int def;
380
381	if (!opt->valp) {
382	dolog ("Option value pointer for `%s' is not set\n",
383	opt->name);
384	continue;
385	}
386
387	len = strlen (opt->name);
388	/* len of opt->name + len of prefix + size of vbox_prefix
389	* (includes trailing zero) + zero + underscore (on behalf of
390	* sizeof) */
391	optname = qemu_malloc (len + preflen + sizeof (vbox_prefix) + 1);
392	if (!optname) {
393	dolog ("Could not allocate memory for option name `%s'\n",
394	opt->name);
395	continue;
396	}
397
398	strcpy (optname, vbox_prefix);
399
400	/* copy while upcasing, including trailing zero */
401	for (i = 0; i <= preflen; ++i) {
402	optname[i + sizeof (vbox_prefix) - 1] = toupper (prefix[i]);
403	}
404	strcat (optname, "_");
405	strcat (optname, opt->name);
406
407	def = 1;
408	switch (opt->tag) {
409	case AUD_OPT_BOOL:
410	case AUD_OPT_INT:
411	{
412	int *intp = opt->valp;
413	intp = audio_get_conf_int (optname, intp, &def);
414	}
415	break;
416
417	case AUD_OPT_FMT:
418	{
419	audfmt_e *fmtp = opt->valp;
420	fmtp = audio_get_conf_fmt (optname, fmtp, &def);
421	}
422	break;
423
424	case AUD_OPT_STR:
425	{
426	const char **strp = opt->valp;
427	strp = audio_get_conf_str (optname, strp, &def);
428	}
429	break;
430
431	default:
432	dolog ("Bad value tag for option `%s' - %d\n",
433	optname, opt->tag);
434	break;
435	}
436
437	if (!opt->overridenp) {
438	opt->overridenp = &opt->overriden;
439	}
440	*opt->overridenp = !def;
441	qemu_free (optname);
442	}
443	}
444
445	static void audio_print_settings (audsettings_t *as)
446	{
447	dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
448
449	switch (as->fmt) {
450	case AUD_FMT_S8:
451	AUD_log (NULL, "S8");
452	break;
453	case AUD_FMT_U8:
454	AUD_log (NULL, "U8");
455	break;
456	case AUD_FMT_S16:
457	AUD_log (NULL, "S16");
458	break;
459	case AUD_FMT_U16:
460	AUD_log (NULL, "U16");
461	break;
462	default:
463	AUD_log (NULL, "invalid(%d)", as->fmt);
464	break;
465	}
466
467	AUD_log (NULL, " endianness=");
468	switch (as->endianness) {
469	case 0:
470	AUD_log (NULL, "little");
471	break;
472	case 1:
473	AUD_log (NULL, "big");
474	break;
475	default:
476	AUD_log (NULL, "invalid");
477	break;
478	}
479	AUD_log (NULL, "\n");
480	}
481
482	static int audio_validate_settings (audsettings_t *as)
483	{
484	int invalid;
485
486	invalid = as->nchannels != 1 && as->nchannels != 2;
487	invalid \|= as->endianness != 0 && as->endianness != 1;
488
489	switch (as->fmt) {
490	case AUD_FMT_S8:
491	case AUD_FMT_U8:
492	case AUD_FMT_S16:
493	case AUD_FMT_U16:
494	break;
495	default:
496	invalid = 1;
497	break;
498	}
499
500	invalid \|= as->freq <= 0;
501	return invalid ? -1 : 0;
502	}
503
504	static int audio_pcm_info_eq (struct audio_pcm_info info, audsettings_t as)
505	{
506	int bits = 8, sign = 0;
507
508	switch (as->fmt) {
509	case AUD_FMT_S8:
510	sign = 1;
511	case AUD_FMT_U8:
512	break;
513
514	case AUD_FMT_S16:
515	sign = 1;
516	case AUD_FMT_U16:
517	bits = 16;
518	break;
519	}
520	return info->freq == as->freq
521	&& info->nchannels == as->nchannels
522	&& info->sign == sign
523	&& info->bits == bits
524	&& info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
525	}
526
527	void audio_pcm_init_info (struct audio_pcm_info info, audsettings_t as)
528	{
529	int bits = 8, sign = 0;
530
531	switch (as->fmt) {
532	case AUD_FMT_S8:
533	sign = 1;
534	case AUD_FMT_U8:
535	break;
536
537	case AUD_FMT_S16:
538	sign = 1;
539	case AUD_FMT_U16:
540	bits = 16;
541	break;
542	}
543
544	info->freq = as->freq;
545	info->bits = bits;
546	info->sign = sign;
547	info->nchannels = as->nchannels;
548	info->shift = (as->nchannels == 2) + (bits == 16);
549	info->align = (1 << info->shift) - 1;
550	info->bytes_per_second = info->freq << info->shift;
551	info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
552	}
553
554	void audio_pcm_info_clear_buf (struct audio_pcm_info info, void buf, int len)
555	{
556	if (!len) {
557	return;
558	}
559
560	if (info->sign) {
561	memset (buf, 0x00, len << info->shift);
562	}
563	else {
564	if (info->bits == 8) {
565	memset (buf, 0x80, len << info->shift);
566	}
567	else {
568	int i;
569	uint16_t *p = buf;
570	int shift = info->nchannels - 1;
571	short s = INT16_MAX;
572
573	if (info->swap_endianness) {
574	s = bswap16 (s);
575	}
576
577	for (i = 0; i < len << shift; i++) {
578	p[i] = s;
579	}
580	}
581	}
582	}
583
584	/*
585	* Capture
586	*/
587	static void noop_conv (st_sample_t dst, const void src,
588	int samples, volume_t *vol)
589	{
590	(void) src;
591	(void) dst;
592	(void) samples;
593	(void) vol;
594	}
595
596	static CaptureVoiceOut *audio_pcm_capture_find_specific (
597	AudioState *s,
598	audsettings_t *as
599	)
600	{
601	CaptureVoiceOut *cap;
602
603	for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
604	if (audio_pcm_info_eq (&cap->hw.info, as)) {
605	return cap;
606	}
607	}
608	return NULL;
609	}
610
611	static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
612	{
613	struct capture_callback *cb;
614
615	#ifdef DEBUG_CAPTURE
616	dolog ("notification %d sent\n", cmd);
617	#endif
618	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
619	cb->ops.notify (cb->opaque, cmd);
620	}
621	}
622
623	static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
624	{
625	if (cap->hw.enabled != enabled) {
626	audcnotification_e cmd;
627	cap->hw.enabled = enabled;
628	cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
629	audio_notify_capture (cap, cmd);
630	}
631	}
632
633	static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
634	{
635	HWVoiceOut *hw = &cap->hw;
636	SWVoiceOut *sw;
637	int enabled = 0;
638
639	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
640	if (sw->active) {
641	enabled = 1;
642	break;
643	}
644	}
645	audio_capture_maybe_changed (cap, enabled);
646	}
647
648	static void audio_detach_capture (HWVoiceOut *hw)
649	{
650	SWVoiceCap *sc = hw->cap_head.lh_first;
651
652	while (sc) {
653	SWVoiceCap *sc1 = sc->entries.le_next;
654	SWVoiceOut *sw = &sc->sw;
655	CaptureVoiceOut *cap = sc->cap;
656	int was_active = sw->active;
657
658	if (sw->rate) {
659	st_rate_stop (sw->rate);
660	sw->rate = NULL;
661	}
662
663	LIST_REMOVE (sw, entries);
664	LIST_REMOVE (sc, entries);
665	qemu_free (sc);
666	if (was_active) {
667	/* We have removed soft voice from the capture:
668	this might have changed the overall status of the capture
669	since this might have been the only active voice */
670	audio_recalc_and_notify_capture (cap);
671	}
672	sc = sc1;
673	}
674	}
675
676	static int audio_attach_capture (AudioState s, HWVoiceOut hw)
677	{
678	CaptureVoiceOut *cap;
679
680	audio_detach_capture (hw);
681	for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
682	SWVoiceCap *sc;
683	SWVoiceOut *sw;
684	HWVoiceOut *hw_cap = &cap->hw;
685
686	sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
687	if (!sc) {
688	dolog ("Could not allocate soft capture voice (%u bytes)\n",
689	sizeof (*sc));
690	return -1;
691	}
692
693	sc->cap = cap;
694	sw = &sc->sw;
695	sw->hw = hw_cap;
696	sw->info = hw->info;
697	sw->empty = 1;
698	sw->active = hw->enabled;
699	sw->conv = noop_conv;
700	sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
701	sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
702	if (!sw->rate) {
703	dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
704	qemu_free (sw);
705	return -1;
706	}
707	LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
708	LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
709	#ifdef DEBUG_CAPTURE
710	asprintf (&sw->name, "for %p %d,%d,%d",
711	hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
712	dolog ("Added %s active = %d\n", sw->name, sw->active);
713	#endif
714	if (sw->active) {
715	audio_capture_maybe_changed (cap, 1);
716	}
717	}
718	return 0;
719	}
720
721	/*
722	* Hard voice (capture)
723	*/
724	static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
725	{
726	SWVoiceIn *sw;
727	int m = hw->total_samples_captured;
728
729	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
730	if (sw->active) {
731	m = audio_MIN (m, sw->total_hw_samples_acquired);
732	}
733	}
734	return m;
735	}
736
737	int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
738	{
739	int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
740	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
741	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
742	return 0;
743	}
744	return live;
745	}
746
747	/*
748	* Soft voice (capture)
749	*/
750	static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
751	{
752	HWVoiceIn *hw = sw->hw;
753	int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
754	int rpos;
755
756	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
757	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
758	return 0;
759	}
760
761	rpos = hw->wpos - live;
762	if (rpos >= 0) {
763	return rpos;
764	}
765	else {
766	return hw->samples + rpos;
767	}
768	}
769
770	int audio_pcm_sw_read (SWVoiceIn sw, void buf, int size)
771	{
772	HWVoiceIn *hw = sw->hw;
773	int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
774	st_sample_t src, dst = sw->buf;
775
776	rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
777
778	live = hw->total_samples_captured - sw->total_hw_samples_acquired;
779	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
780	dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
781	return 0;
782	}
783
784	samples = size >> sw->info.shift;
785	if (!live) {
786	return 0;
787	}
788
789	swlim = (live * sw->ratio) >> 32;
790	swlim = audio_MIN (swlim, samples);
791
792	while (swlim) {
793	src = hw->conv_buf + rpos;
794	isamp = hw->wpos - rpos;
795	/* XXX: <= ? */
796	if (isamp <= 0) {
797	isamp = hw->samples - rpos;
798	}
799
800	if (!isamp) {
801	break;
802	}
803	osamp = swlim;
804
805	if (audio_bug (AUDIO_FUNC, osamp < 0)) {
806	dolog ("osamp=%d\n", osamp);
807	return 0;
808	}
809
810	st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
811	swlim -= osamp;
812	rpos = (rpos + isamp) % hw->samples;
813	dst += osamp;
814	ret += osamp;
815	total += isamp;
816	}
817
818	sw->clip (buf, sw->buf, ret);
819	sw->total_hw_samples_acquired += total;
820	return ret << sw->info.shift;
821	}
822
823	/*
824	* Hard voice (playback)
825	*/
826	static int audio_pcm_hw_find_min_out (HWVoiceOut hw, int nb_livep)
827	{
828	SWVoiceOut *sw;
829	int m = INT_MAX;
830	int nb_live = 0;
831
832	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
833	if (sw->active \|\| !sw->empty) {
834	m = audio_MIN (m, sw->total_hw_samples_mixed);
835	nb_live += 1;
836	}
837	}
838
839	*nb_livep = nb_live;
840	return m;
841	}
842
843	int audio_pcm_hw_get_live_out2 (HWVoiceOut hw, int nb_live)
844	{
845	int smin;
846
847	smin = audio_pcm_hw_find_min_out (hw, nb_live);
848
849	if (!*nb_live) {
850	return 0;
851	}
852	else {
853	int live = smin;
854
855	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
856	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
857	return 0;
858	}
859	return live;
860	}
861	}
862
863	int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
864	{
865	int nb_live;
866	int live;
867
868	live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
869	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
870	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
871	return 0;
872	}
873	return live;
874	}
875
876	/*
877	* Soft voice (playback)
878	*/
879	int audio_pcm_sw_write (SWVoiceOut sw, void buf, int size)
880	{
881	int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
882	int ret = 0, pos = 0, total = 0;
883
884	if (!sw) {
885	return size;
886	}
887
888	hwsamples = sw->hw->samples;
889
890	live = sw->total_hw_samples_mixed;
891	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hwsamples)){
892	dolog ("live=%d hw->samples=%d\n", live, hwsamples);
893	return 0;
894	}
895
896	if (live == hwsamples) {
897	#ifdef DEBUG_OUT
898	dolog ("%s is full %d\n", sw->name, live);
899	#endif
900	return 0;
901	}
902
903	wpos = (sw->hw->rpos + live) % hwsamples;
904	samples = size >> sw->info.shift;
905
906	dead = hwsamples - live;
907	swlim = ((int64_t) dead << 32) / sw->ratio;
908	swlim = audio_MIN (swlim, samples);
909	if (swlim) {
910	#ifndef VBOX
911	sw->conv (sw->buf, buf, swlim, &sw->vol);
912	#else
913	sw->conv (sw->buf, buf, swlim, &pcm_out_volume);
914	#endif
915	}
916
917	while (swlim) {
918	dead = hwsamples - live;
919	left = hwsamples - wpos;
920	blck = audio_MIN (dead, left);
921	if (!blck) {
922	break;
923	}
924	isamp = swlim;
925	osamp = blck;
926	st_rate_flow_mix (
927	sw->rate,
928	sw->buf + pos,
929	sw->hw->mix_buf + wpos,
930	&isamp,
931	&osamp
932	);
933	ret += isamp;
934	swlim -= isamp;
935	pos += isamp;
936	live += osamp;
937	wpos = (wpos + osamp) % hwsamples;
938	total += osamp;
939	}
940
941	sw->total_hw_samples_mixed += total;
942	sw->empty = sw->total_hw_samples_mixed == 0;
943
944	#ifdef DEBUG_OUT
945	dolog (
946	"%s: write size %d ret %d total sw %d\n",
947	SW_NAME (sw),
948	size >> sw->info.shift,
949	ret,
950	sw->total_hw_samples_mixed
951	);
952	#endif
953
954	return ret << sw->info.shift;
955	}
956
957	#ifdef DEBUG_AUDIO
958	static void audio_pcm_print_info (const char cap, struct audio_pcm_info info)
959	{
960	dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
961	cap, info->bits, info->sign, info->freq, info->nchannels);
962	}
963	#endif
964
965	#define DAC
966	#include "audio_template.h"
967	#undef DAC
968	#include "audio_template.h"
969
970	int AUD_write (SWVoiceOut sw, void buf, int size)
971	{
972	int bytes;
973
974	if (!sw) {
975	/* XXX: Consider options */
976	return size;
977	}
978
979	if (!sw->hw->enabled) {
980	dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
981	return 0;
982	}
983
984	bytes = sw->hw->pcm_ops->write (sw, buf, size);
985	return bytes;
986	}
987
988	int AUD_read (SWVoiceIn sw, void buf, int size)
989	{
990	int bytes;
991
992	if (!sw) {
993	/* XXX: Consider options */
994	return size;
995	}
996
997	if (!sw->hw->enabled) {
998	dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
999	return 0;
1000	}
1001
1002	bytes = sw->hw->pcm_ops->read (sw, buf, size);
1003	return bytes;
1004	}
1005
1006	int AUD_get_buffer_size_out (SWVoiceOut *sw)
1007	{
1008	return sw->hw->samples << sw->hw->info.shift;
1009	}
1010
1011	void AUD_set_active_out (SWVoiceOut *sw, int on)
1012	{
1013	HWVoiceOut *hw;
1014
1015	if (!sw) {
1016	return;
1017	}
1018
1019	hw = sw->hw;
1020	if (sw->active != on) {
1021	SWVoiceOut *temp_sw;
1022	SWVoiceCap *sc;
1023
1024	if (on) {
1025	hw->pending_disable = 0;
1026	if (!hw->enabled) {
1027	hw->enabled = 1;
1028	hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1029	}
1030	}
1031	else {
1032	if (hw->enabled) {
1033	int nb_active = 0;
1034
1035	for (temp_sw = hw->sw_head.lh_first; temp_sw;
1036	temp_sw = temp_sw->entries.le_next) {
1037	nb_active += temp_sw->active != 0;
1038	}
1039
1040	hw->pending_disable = nb_active == 1;
1041	}
1042	}
1043
1044	for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1045	sc->sw.active = hw->enabled;
1046	if (hw->enabled) {
1047	audio_capture_maybe_changed (sc->cap, 1);
1048	}
1049	}
1050	sw->active = on;
1051	}
1052	}
1053
1054	void AUD_set_active_in (SWVoiceIn *sw, int on)
1055	{
1056	HWVoiceIn *hw;
1057
1058	if (!sw) {
1059	return;
1060	}
1061
1062	hw = sw->hw;
1063	if (sw->active != on) {
1064	SWVoiceIn *temp_sw;
1065
1066	if (on) {
1067	if (!hw->enabled) {
1068	hw->enabled = 1;
1069	hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1070	}
1071	sw->total_hw_samples_acquired = hw->total_samples_captured;
1072	}
1073	else {
1074	if (hw->enabled) {
1075	int nb_active = 0;
1076
1077	for (temp_sw = hw->sw_head.lh_first; temp_sw;
1078	temp_sw = temp_sw->entries.le_next) {
1079	nb_active += temp_sw->active != 0;
1080	}
1081
1082	if (nb_active == 1) {
1083	hw->enabled = 0;
1084	hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1085	}
1086	}
1087	}
1088	sw->active = on;
1089	}
1090	}
1091
1092	static int audio_get_avail (SWVoiceIn *sw)
1093	{
1094	int live;
1095
1096	if (!sw) {
1097	return 0;
1098	}
1099
1100	live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1101	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > sw->hw->samples)) {
1102	dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1103	return 0;
1104	}
1105
1106	ldebug (
1107	"%s: get_avail live %d ret %lld\n",
1108	SW_NAME (sw),
1109	live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1110	);
1111
1112	return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1113	}
1114
1115	static int audio_get_free (SWVoiceOut *sw)
1116	{
1117	int live, dead;
1118
1119	if (!sw) {
1120	return 0;
1121	}
1122
1123	live = sw->total_hw_samples_mixed;
1124
1125	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > sw->hw->samples)) {
1126	dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1127	return 0;
1128	}
1129
1130	dead = sw->hw->samples - live;
1131
1132	#ifdef DEBUG_OUT
1133	dolog ("%s: get_free live %d dead %d ret %lld\n",
1134	SW_NAME (sw),
1135	live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1136	#endif
1137
1138	return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1139	}
1140
1141	static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1142	{
1143	int n;
1144
1145	if (hw->enabled) {
1146	SWVoiceCap *sc;
1147
1148	for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1149	SWVoiceOut *sw = &sc->sw;
1150	int rpos2 = rpos;
1151
1152	n = samples;
1153	while (n) {
1154	int till_end_of_hw = hw->samples - rpos2;
1155	int to_write = audio_MIN (till_end_of_hw, n);
1156	int bytes = to_write << hw->info.shift;
1157	int written;
1158
1159	sw->buf = hw->mix_buf + rpos2;
1160	written = audio_pcm_sw_write (sw, NULL, bytes);
1161	if (written - bytes) {
1162	dolog ("Could not mix %d bytes into a capture "
1163	"buffer, mixed %d\n",
1164	bytes, written);
1165	break;
1166	}
1167	n -= to_write;
1168	rpos2 = (rpos2 + to_write) % hw->samples;
1169	}
1170	}
1171	}
1172
1173	n = audio_MIN (samples, hw->samples - rpos);
1174	mixeng_sniff_and_clear (hw, hw->mix_buf + rpos, n);
1175	mixeng_sniff_and_clear (hw, hw->mix_buf, samples - n);
1176	}
1177
1178	static void audio_run_out (AudioState *s)
1179	{
1180	HWVoiceOut *hw = NULL;
1181	SWVoiceOut *sw;
1182
1183	while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1184	int played;
1185	int live, free, nb_live, cleanup_required, prev_rpos;
1186
1187	live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1188	if (!nb_live) {
1189	live = 0;
1190	}
1191
1192	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
1193	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1194	continue;
1195	}
1196
1197	if (hw->pending_disable && !nb_live) {
1198	SWVoiceCap *sc;
1199	#ifdef DEBUG_OUT
1200	dolog ("Disabling voice\n");
1201	#endif
1202	hw->enabled = 0;
1203	hw->pending_disable = 0;
1204	hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1205	for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1206	sc->sw.active = 0;
1207	audio_recalc_and_notify_capture (sc->cap);
1208	}
1209	continue;
1210	}
1211
1212	if (!live) {
1213	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1214	if (sw->active) {
1215	free = audio_get_free (sw);
1216	if (free > 0) {
1217	sw->callback.fn (sw->callback.opaque, free);
1218	}
1219	}
1220	}
1221	continue;
1222	}
1223
1224	prev_rpos = hw->rpos;
1225	played = hw->pcm_ops->run_out (hw);
1226	if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1227	dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1228	hw->rpos, hw->samples, played);
1229	hw->rpos = 0;
1230	}
1231
1232	#ifdef DEBUG_OUT
1233	dolog ("played=%d\n", played);
1234	#endif
1235
1236	if (played) {
1237	hw->ts_helper += played;
1238	audio_capture_mix_and_clear (hw, prev_rpos, played);
1239	}
1240
1241	cleanup_required = 0;
1242	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1243	if (!sw->active && sw->empty) {
1244	continue;
1245	}
1246
1247	if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1248	dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1249	played, sw->total_hw_samples_mixed);
1250	played = sw->total_hw_samples_mixed;
1251	}
1252
1253	sw->total_hw_samples_mixed -= played;
1254
1255	if (!sw->total_hw_samples_mixed) {
1256	sw->empty = 1;
1257	cleanup_required \|= !sw->active && !sw->callback.fn;
1258	}
1259
1260	if (sw->active) {
1261	free = audio_get_free (sw);
1262	if (free > 0) {
1263	sw->callback.fn (sw->callback.opaque, free);
1264	}
1265	}
1266	}
1267
1268	if (cleanup_required) {
1269	SWVoiceOut *sw1;
1270
1271	sw = hw->sw_head.lh_first;
1272	while (sw) {
1273	sw1 = sw->entries.le_next;
1274	if (!sw->active && !sw->callback.fn) {
1275	#ifdef DEBUG_PLIVE
1276	dolog ("Finishing with old voice\n");
1277	#endif
1278	audio_close_out (s, sw);
1279	}
1280	sw = sw1;
1281	}
1282	}
1283	}
1284	}
1285
1286	static void audio_run_in (AudioState *s)
1287	{
1288	HWVoiceIn *hw = NULL;
1289
1290	while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1291	SWVoiceIn *sw;
1292	int captured, min;
1293
1294	captured = hw->pcm_ops->run_in (hw);
1295
1296	min = audio_pcm_hw_find_min_in (hw);
1297	hw->total_samples_captured += captured - min;
1298	hw->ts_helper += captured;
1299
1300	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1301	sw->total_hw_samples_acquired -= min;
1302
1303	if (sw->active) {
1304	int avail;
1305
1306	avail = audio_get_avail (sw);
1307	if (avail > 0) {
1308	sw->callback.fn (sw->callback.opaque, avail);
1309	}
1310	}
1311	}
1312	}
1313	}
1314
1315	static void audio_run_capture (AudioState *s)
1316	{
1317	CaptureVoiceOut *cap;
1318
1319	for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1320	int live, rpos, captured;
1321	HWVoiceOut *hw = &cap->hw;
1322	SWVoiceOut *sw;
1323
1324	captured = live = audio_pcm_hw_get_live_out (hw);
1325	rpos = hw->rpos;
1326	while (live) {
1327	int left = hw->samples - rpos;
1328	int to_capture = audio_MIN (live, left);
1329	st_sample_t *src;
1330	struct capture_callback *cb;
1331
1332	src = hw->mix_buf + rpos;
1333	hw->clip (cap->buf, src, to_capture);
1334	mixeng_sniff_and_clear (hw, src, to_capture);
1335
1336	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1337	cb->ops.capture (cb->opaque, cap->buf,
1338	to_capture << hw->info.shift);
1339	}
1340	rpos = (rpos + to_capture) % hw->samples;
1341	live -= to_capture;
1342	}
1343	hw->rpos = rpos;
1344
1345	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1346	if (!sw->active && sw->empty) {
1347	continue;
1348	}
1349
1350	if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1351	dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1352	captured, sw->total_hw_samples_mixed);
1353	captured = sw->total_hw_samples_mixed;
1354	}
1355
1356	sw->total_hw_samples_mixed -= captured;
1357	sw->empty = sw->total_hw_samples_mixed == 0;
1358	}
1359	}
1360	}
1361
1362	static void audio_timer (void *opaque)
1363	{
1364	AudioState *s = opaque;
1365
1366	audio_run_out (s);
1367	audio_run_in (s);
1368	audio_run_capture (s);
1369
1370	TMTimerSet (s->ts, TMTimerGet (s->ts) + conf.period.ticks);
1371	}
1372
1373	static struct audio_option audio_options[] = {
1374	/* DAC */
1375	{"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1376	"Use fixed settings for host DAC", NULL, 0},
1377
1378	{"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1379	"Frequency for fixed host DAC", NULL, 0},
1380
1381	{"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1382	"Format for fixed host DAC", NULL, 0},
1383
1384	{"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1385	"Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1386
1387	{"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1388	"Number of voices for DAC", NULL, 0},
1389
1390	/* ADC */
1391	{"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1392	"Use fixed settings for host ADC", NULL, 0},
1393
1394	{"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1395	"Frequency for fixed host ADC", NULL, 0},
1396
1397	{"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1398	"Format for fixed host ADC", NULL, 0},
1399
1400	{"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1401	"Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1402
1403	{"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1404	"Number of voices for ADC", NULL, 0},
1405
1406	/* Misc */
1407	{"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hz,
1408	"Timer period in HZ (0 - use lowest possible)", NULL, 0},
1409
1410	{"PLIVE", AUD_OPT_BOOL, &conf.plive,
1411	"(undocumented)", NULL, 0},
1412
1413	{NULL, 0, NULL, NULL, NULL, 0}
1414	};
1415
1416	static int audio_driver_init (AudioState s, struct audio_driver drv)
1417	{
1418	if (drv->options) {
1419	audio_process_options (drv->name, drv->options);
1420	}
1421	s->drv_opaque = drv->init ();
1422
1423	if (s->drv_opaque) {
1424	audio_init_nb_voices_out (s, drv);
1425	audio_init_nb_voices_in (s, drv);
1426	s->drv = drv;
1427	return 0;
1428	}
1429	else {
1430	dolog ("Could not init `%s' audio driver\n", drv->name);
1431	return -1;
1432	}
1433	}
1434
1435	static void audio_vm_change_state_handler (void *opaque, int running)
1436	{
1437	AudioState *s = opaque;
1438	HWVoiceOut *hwo = NULL;
1439	HWVoiceIn *hwi = NULL;
1440	int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1441
1442	while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1443	hwo->pcm_ops->ctl_out (hwo, op);
1444	}
1445
1446	while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1447	hwi->pcm_ops->ctl_in (hwi, op);
1448	}
1449	}
1450
1451	static void audio_atexit (void)
1452	{
1453	AudioState *s = &glob_audio_state;
1454	HWVoiceOut *hwo = NULL;
1455	HWVoiceIn *hwi = NULL;
1456
1457	while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1458	SWVoiceCap *sc;
1459
1460	hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1461	hwo->pcm_ops->fini_out (hwo);
1462
1463	for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1464	CaptureVoiceOut *cap = sc->cap;
1465	struct capture_callback *cb;
1466
1467	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1468	cb->ops.destroy (cb->opaque);
1469	}
1470	}
1471	}
1472
1473	while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1474	hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1475	hwi->pcm_ops->fini_in (hwi);
1476	}
1477
1478	if (s->drv) {
1479	s->drv->fini (s->drv_opaque);
1480	}
1481	}
1482
1483	void AUD_register_card (const char name, QEMUSoundCard card)
1484	{
1485	AudioState *s = &glob_audio_state;
1486	card->audio = s;
1487	card->name = qemu_strdup (name);
1488	memset (&card->entries, 0, sizeof (card->entries));
1489	LIST_INSERT_HEAD (&s->card_head, card, entries);
1490	}
1491
1492	void AUD_remove_card (QEMUSoundCard *card)
1493	{
1494	LIST_REMOVE (card, entries);
1495	card->audio = NULL;
1496	qemu_free (card->name);
1497	}
1498
1499	static void audio_timer_helper (PPDMDRVINS pDrvIns, PTMTIMER pTimer)
1500	{
1501	AudioState *s = &glob_audio_state;
1502	audio_timer (s);
1503	}
1504
1505	static int AUD_init (PPDMDRVINS pDrvIns, const char *drvname)
1506	{
1507	size_t i;
1508	int done = 0;
1509	AudioState *s = &glob_audio_state;
1510	int rc;
1511
1512	LIST_INIT (&s->hw_head_out);
1513	LIST_INIT (&s->hw_head_in);
1514	LIST_INIT (&s->cap_head);
1515
1516	rc = pDrvIns->pDrvHlp->pfnTMTimerCreate (pDrvIns, TMCLOCK_VIRTUAL,
1517	audio_timer_helper, "Audio timer", &s->ts);
1518	if (VBOX_FAILURE (rc))
1519	return rc;
1520
1521	audio_process_options ("AUDIO", audio_options);
1522
1523	s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1524	s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1525
1526	if (s->nb_hw_voices_out <= 0) {
1527	dolog ("Bogus number of playback voices %d, setting to 1\n",
1528	s->nb_hw_voices_out);
1529	s->nb_hw_voices_out = 1;
1530	}
1531
1532	if (s->nb_hw_voices_in <= 0) {
1533	dolog ("Bogus number of capture voices %d, setting to 0\n",
1534	s->nb_hw_voices_in);
1535	s->nb_hw_voices_in = 0;
1536	}
1537
1538	LogRel(("Audio: Trying driver '%s'.\n", drvname));
1539
1540	if (drvname) {
1541	int found = 0;
1542
1543	for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1544	if (!strcmp (drvname, drvtab[i]->name)) {
1545	done = !audio_driver_init (s, drvtab[i]);
1546	found = 1;
1547	break;
1548	}
1549	}
1550
1551	if (!found) {
1552	dolog ("Unknown audio driver `%s'\n", drvname);
1553	}
1554	}
1555
1556	if (!done) {
1557	for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1558	if (drvtab[i]->can_be_default) {
1559	LogRel(("Audio: Initialization of driver '%s' failed, trying '%s'.\n",
1560	drvname, drvtab[i]->name));
1561	drvname = drvtab[i]->name;
1562	done = !audio_driver_init (s, drvtab[i]);
1563	}
1564	}
1565	}
1566
1567	if (!done) {
1568	done = !audio_driver_init (s, &no_audio_driver);
1569	if (!done) {
1570	dolog ("Could not initialize audio subsystem\n");
1571	}
1572	else {
1573	LogRel(("Audio: Initialization of driver '%s' failed, using NULL driver.\n", drvname));
1574	dolog ("warning: Using timer based audio emulation\n");
1575	}
1576	}
1577
1578	if (done) {
1579	if (conf.period.hz <= 0) {
1580	if (conf.period.hz < 0) {
1581	dolog ("warning: Timer period is negative - %d "
1582	"treating as zero\n",
1583	conf.period.hz);
1584	}
1585	conf.period.ticks = 1;
1586	}
1587	else {
1588	conf.period.ticks = pDrvIns->pDrvHlp->pfnTMGetVirtualFreq (pDrvIns)
1589	/ conf.period.hz;
1590	}
1591	}
1592	else {
1593	/* XXX */
1594	rc = TMTimerDestroy (s->ts);
1595	return rc;
1596	}
1597
1598	LIST_INIT (&s->card_head);
1599	TMTimerSet (s->ts, TMTimerGet (s->ts) + conf.period.ticks);
1600	return VINF_SUCCESS;
1601	}
1602
1603	CaptureVoiceOut *AUD_add_capture (
1604	AudioState *s,
1605	audsettings_t *as,
1606	struct audio_capture_ops *ops,
1607	void *cb_opaque
1608	)
1609	{
1610	CaptureVoiceOut *cap;
1611	struct capture_callback *cb;
1612
1613	if (!s) {
1614	/* XXX suppress */
1615	s = &glob_audio_state;
1616	}
1617
1618	if (audio_validate_settings (as)) {
1619	dolog ("Invalid settings were passed when trying to add capture\n");
1620	audio_print_settings (as);
1621	goto err0;
1622	}
1623
1624	cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1625	if (!cb) {
1626	dolog ("Could not allocate capture callback information, size %u\n",
1627	sizeof (*cb));
1628	goto err0;
1629	}
1630	cb->ops = *ops;
1631	cb->opaque = cb_opaque;
1632
1633	cap = audio_pcm_capture_find_specific (s, as);
1634	if (cap) {
1635	LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1636	return cap;
1637	}
1638	else {
1639	HWVoiceOut *hw;
1640	CaptureVoiceOut *cap;
1641
1642	cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1643	if (!cap) {
1644	dolog ("Could not allocate capture voice, size %u\n",
1645	sizeof (*cap));
1646	goto err1;
1647	}
1648
1649	hw = &cap->hw;
1650	LIST_INIT (&hw->sw_head);
1651	LIST_INIT (&cap->cb_head);
1652
1653	/* XXX find a more elegant way */
1654	hw->samples = 4096 * 4;
1655	hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1656	sizeof (st_sample_t));
1657	if (!hw->mix_buf) {
1658	dolog ("Could not allocate capture mix buffer (%d samples)\n",
1659	hw->samples);
1660	goto err2;
1661	}
1662
1663	audio_pcm_init_info (&hw->info, as);
1664
1665	cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1666	if (!cap->buf) {
1667	dolog ("Could not allocate capture buffer "
1668	"(%d samples, each %d bytes)\n",
1669	hw->samples, 1 << hw->info.shift);
1670	goto err3;
1671	}
1672
1673	hw->clip = mixeng_clip
1674	[hw->info.nchannels == 2]
1675	[hw->info.sign]
1676	[hw->info.swap_endianness]
1677	[hw->info.bits == 16];
1678
1679	LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1680	LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1681
1682	hw = NULL;
1683	while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1684	audio_attach_capture (s, hw);
1685	}
1686	return cap;
1687
1688	err3:
1689	qemu_free (cap->hw.mix_buf);
1690	err2:
1691	qemu_free (cap);
1692	err1:
1693	qemu_free (cb);
1694	err0:
1695	return NULL;
1696	}
1697	}
1698
1699	void AUD_del_capture (CaptureVoiceOut cap, void cb_opaque)
1700	{
1701	struct capture_callback *cb;
1702
1703	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1704	if (cb->opaque == cb_opaque) {
1705	cb->ops.destroy (cb_opaque);
1706	LIST_REMOVE (cb, entries);
1707	qemu_free (cb);
1708
1709	if (!cap->cb_head.lh_first) {
1710	SWVoiceOut sw = cap->hw.sw_head.lh_first, sw1;
1711
1712	while (sw) {
1713	SWVoiceCap sc = (SWVoiceCap ) sw;
1714	#ifdef DEBUG_CAPTURE
1715	dolog ("freeing %s\n", sw->name);
1716	#endif
1717
1718	sw1 = sw->entries.le_next;
1719	if (sw->rate) {
1720	st_rate_stop (sw->rate);
1721	sw->rate = NULL;
1722	}
1723	LIST_REMOVE (sw, entries);
1724	LIST_REMOVE (sc, entries);
1725	qemu_free (sc);
1726	sw = sw1;
1727	}
1728	LIST_REMOVE (cap, entries);
1729	qemu_free (cap);
1730	}
1731	return;
1732	}
1733	}
1734	}
1735
1736	void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1737	{
1738	if (sw)
1739	{
1740	sw->vol.mute = mute;
1741	sw->vol.l = (uint32_t)lvol * 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1742	sw->vol.r = (uint32_t)rvol * 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1743	}
1744	}
1745
1746	void AUD_set_volume (audmixerctl_t mt, int mute, uint8_t lvol, uint8_t *rvol)
1747	{
1748	volume_t *vol = NULL;
1749	const char *name;
1750
1751	switch (mt)
1752	{
1753	case AUD_MIXER_VOLUME:
1754	name = "MASTER";
1755	vol = &pcm_out_volume;
1756	break;
1757	case AUD_MIXER_PCM:
1758	name = "PCM_OUT";
1759	break;
1760	case AUD_MIXER_LINE_IN:
1761	name = "LINE_IN";
1762	vol = &pcm_in_volume;
1763	break;
1764	default:
1765	return;
1766
1767	}
1768
1769	if (vol)
1770	{
1771	vol->mute = *mute;
1772	vol->l = ((uint32_t)lvol) 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1773	vol->r = ((uint32_t)rvol) 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1774	}
1775	#if 0
1776	LogRel(("AUDIO: Set '%s' volume to %d%%/%d%%\n", name, (lvol100)/255, (rvol100)/255l));
1777	#endif
1778	}
1779
1780	void AUD_set_record_source (audrecsource_t ars, audrecsource_t als)
1781	{
1782	LogRel(("Audio: set_record_source ars=%d als=%d (not implemented)\n", ars, als));
1783	}
1784
1785	/**
1786	* Queries an interface to the driver.
1787	*
1788	* @returns Pointer to interface.
1789	* @returns NULL if the interface was not supported by the driver.
1790	* @param pInterface Pointer to this interface structure.
1791	* @param enmInterface The requested interface identification.
1792	* @thread Any thread.
1793	*/
1794	static DECLCALLBACK(void *) drvAudioQueryInterface(PPDMIBASE pInterface,
1795	PDMINTERFACE enmInterface)
1796	{
1797	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
1798	PDRVAUDIO pData = PDMINS2DATA(pDrvIns, PDRVAUDIO);
1799	switch (enmInterface)
1800	{
1801	case PDMINTERFACE_BASE:
1802	return &pDrvIns->IBase;
1803	case PDMINTERFACE_AUDIO_CONNECTOR:
1804	return &pData->IAudioConnector;
1805	default:
1806	return NULL;
1807	}
1808	}
1809
1810	/**
1811	* Power Off notification.
1812	*
1813	* @param pDrvIns The driver instance data.
1814	*/
1815	static DECLCALLBACK(void) drvAudioPowerOff(PPDMDRVINS pDrvIns)
1816	{
1817	AudioState *s = &glob_audio_state;
1818	audio_vm_change_state_handler (s, 0);
1819	}
1820
1821	/**
1822	* Destruct a driver instance.
1823	*
1824	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
1825	* resources can be freed correctly.
1826	*
1827	* @param pDrvIns The driver instance data.
1828	*/
1829	static DECLCALLBACK(void) drvAudioDestruct(PPDMDRVINS pDrvIns)
1830	{
1831	LogFlow(("drvAUDIODestruct:\n"));
1832
1833	audio_atexit ();
1834	}
1835
1836	/**
1837	* Construct an AUDIO driver instance.
1838	*
1839	* @returns VBox status.
1840	* @param pDrvIns The driver instance data.
1841	* If the registration structure is needed, pDrvIns->pDrvReg points to it.
1842	* @param pCfgHandle Configuration node handle for the driver. Use this to obtain the configuration
1843	* of the driver instance. It's also found in pDrvIns->pCfgHandle, but like
1844	* iInstance it's expected to be used a bit in this function.
1845	*/
1846	static DECLCALLBACK(int) drvAudioConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle)
1847	{
1848	int rc;
1849	PDRVAUDIO pData = PDMINS2DATA(pDrvIns, PDRVAUDIO);
1850	char *drvname;
1851
1852	LogFlow(("drvAUDIOConstruct:\n"));
1853	/*
1854	* Validate the config.
1855	*/
1856	if (!CFGMR3AreValuesValid(pCfgHandle, "AudioDriver\0"))
1857	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
1858
1859	/*
1860	* Init the static parts.
1861	*/
1862	pData->pDrvIns = pDrvIns;
1863	/* IBase */
1864	pDrvIns->IBase.pfnQueryInterface = drvAudioQueryInterface;
1865	/* IAudio */
1866	/* pData->IAudioConnector.pfn; */
1867
1868	glob_audio_state.pDrvIns = pDrvIns;
1869
1870	rc = CFGMR3QueryStringAlloc (pCfgHandle, "AudioDriver", &drvname);
1871	if (VBOX_FAILURE (rc))
1872	return rc;
1873
1874	rc = AUD_init (pDrvIns, drvname);
1875	if (VBOX_FAILURE (rc))
1876	return rc;
1877
1878	MMR3HeapFree (drvname);
1879
1880	return VINF_SUCCESS;
1881	}
1882
1883	/**
1884	* Suspend notification.
1885	*
1886	* @returns VBox status.
1887	* @param pDrvIns The driver instance data.
1888	*/
1889	static DECLCALLBACK(void) drvAudioSuspend(PPDMDRVINS pDrvIns)
1890	{
1891	AudioState *s = &glob_audio_state;
1892	audio_vm_change_state_handler (s, 0);
1893	}
1894
1895	/**
1896	* Resume notification.
1897	*
1898	* @returns VBox status.
1899	* @param pDrvIns The driver instance data.
1900	*/
1901	static DECLCALLBACK(void) audioResume(PPDMDRVINS pDrvIns)
1902	{
1903	AudioState *s = &glob_audio_state;
1904	audio_vm_change_state_handler (s, 1);
1905	}
1906
1907	/**
1908	* Audio driver registration record.
1909	*/
1910	const PDMDRVREG g_DrvAUDIO =
1911	{
1912	/* u32Version */
1913	PDM_DRVREG_VERSION,
1914	/* szDriverName */
1915	"AUDIO",
1916	/* pszDescription */
1917	"AUDIO Driver",
1918	/* fFlags */
1919	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1920	/* fClass. */
1921	PDM_DRVREG_CLASS_AUDIO,
1922	/* cMaxInstances */
1923	1,
1924	/* cbInstance */
1925	sizeof(DRVAUDIO),
1926	/* pfnConstruct */
1927	drvAudioConstruct,
1928	/* pfnDestruct */
1929	drvAudioDestruct,
1930	/* pfnIOCtl */
1931	NULL,
1932	/* pfnPowerOn */
1933	NULL,
1934	/* pfnReset */
1935	NULL,
1936	/* pfnSuspend */
1937	drvAudioSuspend,
1938	/* pfnResume */
1939	audioResume,
1940	/* pfnDetach */
1941	NULL,
1942	/* pfnPowerOff */
1943	drvAudioPowerOff
1944	};

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source: vbox/trunk/src/VBox/Devices/Audio/audio.c@ 1824

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