audio.c@ 1248

Last change on this file since 1248 was 1071, checked in by vboxsync, 18 years ago
fix Vista crash if sound is enabled; made audio LogRel consistent; winmm was never used, show dsound instead
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 48.0 KB

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

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source: vbox/trunk/src/VBox/Devices/Audio/audio.c@ 1248

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