audio.c@ 355

Last change on this file since 355 was 355, checked in by vboxsync, 18 years ago
activated soft volume mixing
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 47.6 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	UINT_MAX,
131	UINT_MAX
132	#endif
133	};
134
135	#ifdef VBOX
136	volume_t pcm_out_volume =
137	{
138	0,
139	UINT_MAX,
140	UINT_MAX
141	};
142	#endif
143
144	/* http://www.df.lth.se/~john_e/gems/gem002d.html */
145	/* http://www.multi-platforms.com/Tips/PopCount.htm */
146	uint32_t popcount (uint32_t u)
147	{
148	u = ((u&0x55555555) + ((u>>1)&0x55555555));
149	u = ((u&0x33333333) + ((u>>2)&0x33333333));
150	u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
151	u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
152	u = ( u&0x0000ffff) + (u>>16);
153	return u;
154	}
155
156	inline uint32_t lsbindex (uint32_t u)
157	{
158	return popcount ((u&-u)-1);
159	}
160
161	uint64_t audio_get_clock (void)
162	{
163	AudioState *s;
164
165	s = &glob_audio_state;
166	return s->pDrvIns->pDrvHlp->pfnTMGetVirtualTime (s->pDrvIns);
167	}
168
169	uint64_t audio_get_ticks_per_sec (void)
170	{
171	AudioState *s;
172
173	s = &glob_audio_state;
174	return s->pDrvIns->pDrvHlp->pfnTMGetVirtualFreq (s->pDrvIns);
175	}
176
177	#ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
178	#error No its not
179	#else
180	int audio_bug (const char *funcname, int cond)
181	{
182	if (cond) {
183	static int shown;
184
185	AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
186	if (!shown) {
187	shown = 1;
188	AUD_log (NULL, "Save all your work and restart without audio\n");
189	AUD_log (NULL, "Please send a bug report to InnoTek\n");
190	AUD_log (NULL, "I am sorry\n");
191	}
192	AUD_log (NULL, "Context:\n");
193
194	#if defined AUDIO_BREAKPOINT_ON_BUG
195	# if defined HOST_I386
196	# if defined __GNUC__
197	__asm__ ("int3");
198	# elif defined _MSC_VER
199	_asm _emit 0xcc;
200	# else
201	abort ();
202	# endif
203	# else
204	abort ();
205	# endif
206	#endif
207	}
208
209	return cond;
210	}
211	#endif
212
213	void audio_calloc (const char funcname, int nmemb, size_t size)
214	{
215	int cond;
216	size_t len;
217
218	len = nmemb * size;
219	cond = !nmemb \|\| !size;
220	cond \|= nmemb < 0;
221	cond \|= len < size;
222
223	if (audio_bug ("audio_calloc", cond)) {
224	AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
225	funcname);
226	AUD_log (NULL, "nmemb=%d size=%" FMTZ "u (len=%" FMTZ "u)\n",
227	nmemb, size, len);
228	return NULL;
229	}
230
231	return qemu_mallocz (len);
232	}
233
234	static const char *audio_audfmt_to_string (audfmt_e fmt)
235	{
236	switch (fmt) {
237	case AUD_FMT_U8:
238	return "U8";
239
240	case AUD_FMT_U16:
241	return "U16";
242
243	case AUD_FMT_S8:
244	return "S8";
245
246	case AUD_FMT_S16:
247	return "S16";
248	}
249
250	dolog ("Bogus audfmt %d returning S16\n", fmt);
251	return "S16";
252	}
253
254	static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
255	int *defaultp)
256	{
257	if (!strcasecmp (s, "u8")) {
258	*defaultp = 0;
259	return AUD_FMT_U8;
260	}
261	else if (!strcasecmp (s, "u16")) {
262	*defaultp = 0;
263	return AUD_FMT_U16;
264	}
265	else if (!strcasecmp (s, "s8")) {
266	*defaultp = 0;
267	return AUD_FMT_S8;
268	}
269	else if (!strcasecmp (s, "s16")) {
270	*defaultp = 0;
271	return AUD_FMT_S16;
272	}
273	else {
274	dolog ("Bogus audio format `%s' using %s\n",
275	s, audio_audfmt_to_string (defval));
276	*defaultp = 1;
277	return defval;
278	}
279	}
280
281	static audfmt_e audio_get_conf_fmt (const char *envname,
282	audfmt_e defval,
283	int *defaultp)
284	{
285	const char *var = getenv (envname);
286	if (!var) {
287	*defaultp = 1;
288	return defval;
289	}
290	return audio_string_to_audfmt (var, defval, defaultp);
291	}
292
293	static int audio_get_conf_int (const char key, int defval, int defaultp)
294	{
295	int val;
296	char *strval;
297
298	strval = getenv (key);
299	if (strval) {
300	*defaultp = 0;
301	val = atoi (strval);
302	return val;
303	}
304	else {
305	*defaultp = 1;
306	return defval;
307	}
308	}
309
310	static const char audio_get_conf_str (const char key,
311	const char *defval,
312	int *defaultp)
313	{
314	const char *val = getenv (key);
315	if (!val) {
316	*defaultp = 1;
317	return defval;
318	}
319	else {
320	*defaultp = 0;
321	return val;
322	}
323	}
324
325	void AUD_vlog (const char cap, const char fmt, va_list ap)
326	{
327	if (cap) {
328	Log (("%s: %N", cap, fmt, &ap));
329	}
330	else {
331	Log (("%N", fmt, &ap));
332	}
333	}
334
335	void AUD_log (const char cap, const char fmt, ...)
336	{
337	va_list ap;
338
339	va_start (ap, fmt);
340	AUD_vlog (cap, fmt, ap);
341	va_end (ap);
342	}
343
344	static void audio_process_options (const char *prefix,
345	struct audio_option *opt)
346	{
347	char *optname;
348	const char vbox_prefix[] = "VBOX_";
349	size_t preflen;
350
351	if (audio_bug (AUDIO_FUNC, !prefix)) {
352	dolog ("prefix = NULL\n");
353	return;
354	}
355
356	if (audio_bug (AUDIO_FUNC, !opt)) {
357	dolog ("opt = NULL\n");
358	return;
359	}
360
361	preflen = strlen (prefix);
362
363	for (; opt->name; opt++) {
364	size_t len, i;
365	int def;
366
367	if (!opt->valp) {
368	dolog ("Option value pointer for `%s' is not set\n",
369	opt->name);
370	continue;
371	}
372
373	len = strlen (opt->name);
374	/* len of opt->name + len of prefix + size of vbox_prefix
375	* (includes trailing zero) + zero + underscore (on behalf of
376	* sizeof) */
377	optname = qemu_malloc (len + preflen + sizeof (vbox_prefix) + 1);
378	if (!optname) {
379	dolog ("Could not allocate memory for option name `%s'\n",
380	opt->name);
381	continue;
382	}
383
384	strcpy (optname, vbox_prefix);
385
386	/* copy while upcasing, including trailing zero */
387	for (i = 0; i <= preflen; ++i) {
388	optname[i + sizeof (vbox_prefix) - 1] = toupper (prefix[i]);
389	}
390	strcat (optname, "_");
391	strcat (optname, opt->name);
392
393	def = 1;
394	switch (opt->tag) {
395	case AUD_OPT_BOOL:
396	case AUD_OPT_INT:
397	{
398	int *intp = opt->valp;
399	intp = audio_get_conf_int (optname, intp, &def);
400	}
401	break;
402
403	case AUD_OPT_FMT:
404	{
405	audfmt_e *fmtp = opt->valp;
406	fmtp = audio_get_conf_fmt (optname, fmtp, &def);
407	}
408	break;
409
410	case AUD_OPT_STR:
411	{
412	const char **strp = opt->valp;
413	strp = audio_get_conf_str (optname, strp, &def);
414	}
415	break;
416
417	default:
418	dolog ("Bad value tag for option `%s' - %d\n",
419	optname, opt->tag);
420	break;
421	}
422
423	if (!opt->overridenp) {
424	opt->overridenp = &opt->overriden;
425	}
426	*opt->overridenp = !def;
427	qemu_free (optname);
428	}
429	}
430
431	static void audio_print_settings (audsettings_t *as)
432	{
433	dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
434
435	switch (as->fmt) {
436	case AUD_FMT_S8:
437	AUD_log (NULL, "S8");
438	break;
439	case AUD_FMT_U8:
440	AUD_log (NULL, "U8");
441	break;
442	case AUD_FMT_S16:
443	AUD_log (NULL, "S16");
444	break;
445	case AUD_FMT_U16:
446	AUD_log (NULL, "U16");
447	break;
448	default:
449	AUD_log (NULL, "invalid(%d)", as->fmt);
450	break;
451	}
452
453	AUD_log (NULL, " endianness=");
454	switch (as->endianness) {
455	case 0:
456	AUD_log (NULL, "little");
457	break;
458	case 1:
459	AUD_log (NULL, "big");
460	break;
461	default:
462	AUD_log (NULL, "invalid");
463	break;
464	}
465	AUD_log (NULL, "\n");
466	}
467
468	static int audio_validate_settings (audsettings_t *as)
469	{
470	int invalid;
471
472	invalid = as->nchannels != 1 && as->nchannels != 2;
473	invalid \|= as->endianness != 0 && as->endianness != 1;
474
475	switch (as->fmt) {
476	case AUD_FMT_S8:
477	case AUD_FMT_U8:
478	case AUD_FMT_S16:
479	case AUD_FMT_U16:
480	break;
481	default:
482	invalid = 1;
483	break;
484	}
485
486	invalid \|= as->freq <= 0;
487	return invalid ? -1 : 0;
488	}
489
490	static int audio_pcm_info_eq (struct audio_pcm_info info, audsettings_t as)
491	{
492	int bits = 8, sign = 0;
493
494	switch (as->fmt) {
495	case AUD_FMT_S8:
496	sign = 1;
497	case AUD_FMT_U8:
498	break;
499
500	case AUD_FMT_S16:
501	sign = 1;
502	case AUD_FMT_U16:
503	bits = 16;
504	break;
505	}
506	return info->freq == as->freq
507	&& info->nchannels == as->nchannels
508	&& info->sign == sign
509	&& info->bits == bits
510	&& info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
511	}
512
513	void audio_pcm_init_info (struct audio_pcm_info info, audsettings_t as)
514	{
515	int bits = 8, sign = 0;
516
517	switch (as->fmt) {
518	case AUD_FMT_S8:
519	sign = 1;
520	case AUD_FMT_U8:
521	break;
522
523	case AUD_FMT_S16:
524	sign = 1;
525	case AUD_FMT_U16:
526	bits = 16;
527	break;
528	}
529
530	info->freq = as->freq;
531	info->bits = bits;
532	info->sign = sign;
533	info->nchannels = as->nchannels;
534	info->shift = (as->nchannels == 2) + (bits == 16);
535	info->align = (1 << info->shift) - 1;
536	info->bytes_per_second = info->freq << info->shift;
537	info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
538	}
539
540	void audio_pcm_info_clear_buf (struct audio_pcm_info info, void buf, int len)
541	{
542	if (!len) {
543	return;
544	}
545
546	if (info->sign) {
547	memset (buf, 0x00, len << info->shift);
548	}
549	else {
550	if (info->bits == 8) {
551	memset (buf, 0x80, len << info->shift);
552	}
553	else {
554	int i;
555	uint16_t *p = buf;
556	int shift = info->nchannels - 1;
557	short s = INT16_MAX;
558
559	if (info->swap_endianness) {
560	s = bswap16 (s);
561	}
562
563	for (i = 0; i < len << shift; i++) {
564	p[i] = s;
565	}
566	}
567	}
568	}
569
570	/*
571	* Capture
572	*/
573	static void noop_conv (st_sample_t dst, const void src,
574	int samples, volume_t *vol)
575	{
576	(void) src;
577	(void) dst;
578	(void) samples;
579	(void) vol;
580	}
581
582	static CaptureVoiceOut *audio_pcm_capture_find_specific (
583	AudioState *s,
584	audsettings_t *as
585	)
586	{
587	CaptureVoiceOut *cap;
588
589	for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
590	if (audio_pcm_info_eq (&cap->hw.info, as)) {
591	return cap;
592	}
593	}
594	return NULL;
595	}
596
597	static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
598	{
599	struct capture_callback *cb;
600
601	#ifdef DEBUG_CAPTURE
602	dolog ("notification %d sent\n", cmd);
603	#endif
604	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
605	cb->ops.notify (cb->opaque, cmd);
606	}
607	}
608
609	static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
610	{
611	if (cap->hw.enabled != enabled) {
612	audcnotification_e cmd;
613	cap->hw.enabled = enabled;
614	cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
615	audio_notify_capture (cap, cmd);
616	}
617	}
618
619	static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
620	{
621	HWVoiceOut *hw = &cap->hw;
622	SWVoiceOut *sw;
623	int enabled = 0;
624
625	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
626	if (sw->active) {
627	enabled = 1;
628	break;
629	}
630	}
631	audio_capture_maybe_changed (cap, enabled);
632	}
633
634	static void audio_detach_capture (HWVoiceOut *hw)
635	{
636	SWVoiceCap *sc = hw->cap_head.lh_first;
637
638	while (sc) {
639	SWVoiceCap *sc1 = sc->entries.le_next;
640	SWVoiceOut *sw = &sc->sw;
641	CaptureVoiceOut *cap = sc->cap;
642	int was_active = sw->active;
643
644	if (sw->rate) {
645	st_rate_stop (sw->rate);
646	sw->rate = NULL;
647	}
648
649	LIST_REMOVE (sw, entries);
650	LIST_REMOVE (sc, entries);
651	qemu_free (sc);
652	if (was_active) {
653	/* We have removed soft voice from the capture:
654	this might have changed the overall status of the capture
655	since this might have been the only active voice */
656	audio_recalc_and_notify_capture (cap);
657	}
658	sc = sc1;
659	}
660	}
661
662	static int audio_attach_capture (AudioState s, HWVoiceOut hw)
663	{
664	CaptureVoiceOut *cap;
665
666	audio_detach_capture (hw);
667	for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
668	SWVoiceCap *sc;
669	SWVoiceOut *sw;
670	HWVoiceOut *hw_cap = &cap->hw;
671
672	sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
673	if (!sc) {
674	dolog ("Could not allocate soft capture voice (%u bytes)\n",
675	sizeof (*sc));
676	return -1;
677	}
678
679	sc->cap = cap;
680	sw = &sc->sw;
681	sw->hw = hw_cap;
682	sw->info = hw->info;
683	sw->empty = 1;
684	sw->active = hw->enabled;
685	sw->conv = noop_conv;
686	sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
687	sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
688	if (!sw->rate) {
689	dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
690	qemu_free (sw);
691	return -1;
692	}
693	LIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
694	LIST_INSERT_HEAD (&hw->cap_head, sc, entries);
695	#ifdef DEBUG_CAPTURE
696	asprintf (&sw->name, "for %p %d,%d,%d",
697	hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
698	dolog ("Added %s active = %d\n", sw->name, sw->active);
699	#endif
700	if (sw->active) {
701	audio_capture_maybe_changed (cap, 1);
702	}
703	}
704	return 0;
705	}
706
707	/*
708	* Hard voice (capture)
709	*/
710	static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
711	{
712	SWVoiceIn *sw;
713	int m = hw->total_samples_captured;
714
715	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
716	if (sw->active) {
717	m = audio_MIN (m, sw->total_hw_samples_acquired);
718	}
719	}
720	return m;
721	}
722
723	int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
724	{
725	int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
726	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
727	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
728	return 0;
729	}
730	return live;
731	}
732
733	/*
734	* Soft voice (capture)
735	*/
736	static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
737	{
738	HWVoiceIn *hw = sw->hw;
739	int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
740	int rpos;
741
742	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
743	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
744	return 0;
745	}
746
747	rpos = hw->wpos - live;
748	if (rpos >= 0) {
749	return rpos;
750	}
751	else {
752	return hw->samples + rpos;
753	}
754	}
755
756	int audio_pcm_sw_read (SWVoiceIn sw, void buf, int size)
757	{
758	HWVoiceIn *hw = sw->hw;
759	int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
760	st_sample_t src, dst = sw->buf;
761
762	rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
763
764	live = hw->total_samples_captured - sw->total_hw_samples_acquired;
765	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
766	dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
767	return 0;
768	}
769
770	samples = size >> sw->info.shift;
771	if (!live) {
772	return 0;
773	}
774
775	swlim = (live * sw->ratio) >> 32;
776	swlim = audio_MIN (swlim, samples);
777
778	while (swlim) {
779	src = hw->conv_buf + rpos;
780	isamp = hw->wpos - rpos;
781	/* XXX: <= ? */
782	if (isamp <= 0) {
783	isamp = hw->samples - rpos;
784	}
785
786	if (!isamp) {
787	break;
788	}
789	osamp = swlim;
790
791	if (audio_bug (AUDIO_FUNC, osamp < 0)) {
792	dolog ("osamp=%d\n", osamp);
793	return 0;
794	}
795
796	st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
797	swlim -= osamp;
798	rpos = (rpos + isamp) % hw->samples;
799	dst += osamp;
800	ret += osamp;
801	total += isamp;
802	}
803
804	sw->clip (buf, sw->buf, ret);
805	sw->total_hw_samples_acquired += total;
806	return ret << sw->info.shift;
807	}
808
809	/*
810	* Hard voice (playback)
811	*/
812	static int audio_pcm_hw_find_min_out (HWVoiceOut hw, int nb_livep)
813	{
814	SWVoiceOut *sw;
815	int m = INT_MAX;
816	int nb_live = 0;
817
818	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
819	if (sw->active \|\| !sw->empty) {
820	m = audio_MIN (m, sw->total_hw_samples_mixed);
821	nb_live += 1;
822	}
823	}
824
825	*nb_livep = nb_live;
826	return m;
827	}
828
829	int audio_pcm_hw_get_live_out2 (HWVoiceOut hw, int nb_live)
830	{
831	int smin;
832
833	smin = audio_pcm_hw_find_min_out (hw, nb_live);
834
835	if (!*nb_live) {
836	return 0;
837	}
838	else {
839	int live = smin;
840
841	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
842	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
843	return 0;
844	}
845	return live;
846	}
847	}
848
849	int audio_pcm_hw_get_live_out (HWVoiceOut *hw)
850	{
851	int nb_live;
852	int live;
853
854	live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
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	* Soft voice (playback)
864	*/
865	int audio_pcm_sw_write (SWVoiceOut sw, void buf, int size)
866	{
867	int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
868	int ret = 0, pos = 0, total = 0;
869
870	if (!sw) {
871	return size;
872	}
873
874	hwsamples = sw->hw->samples;
875
876	live = sw->total_hw_samples_mixed;
877	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hwsamples)){
878	dolog ("live=%d hw->samples=%d\n", live, hwsamples);
879	return 0;
880	}
881
882	if (live == hwsamples) {
883	#ifdef DEBUG_OUT
884	dolog ("%s is full %d\n", sw->name, live);
885	#endif
886	return 0;
887	}
888
889	wpos = (sw->hw->rpos + live) % hwsamples;
890	samples = size >> sw->info.shift;
891
892	dead = hwsamples - live;
893	swlim = ((int64_t) dead << 32) / sw->ratio;
894	swlim = audio_MIN (swlim, samples);
895	if (swlim) {
896	#ifndef VBOX
897	sw->conv (sw->buf, buf, swlim, &sw->vol);
898	#else
899	sw->conv (sw->buf, buf, swlim, &pcm_out_volume);
900	#endif
901	}
902
903	while (swlim) {
904	dead = hwsamples - live;
905	left = hwsamples - wpos;
906	blck = audio_MIN (dead, left);
907	if (!blck) {
908	break;
909	}
910	isamp = swlim;
911	osamp = blck;
912	st_rate_flow_mix (
913	sw->rate,
914	sw->buf + pos,
915	sw->hw->mix_buf + wpos,
916	&isamp,
917	&osamp
918	);
919	ret += isamp;
920	swlim -= isamp;
921	pos += isamp;
922	live += osamp;
923	wpos = (wpos + osamp) % hwsamples;
924	total += osamp;
925	}
926
927	sw->total_hw_samples_mixed += total;
928	sw->empty = sw->total_hw_samples_mixed == 0;
929
930	#ifdef DEBUG_OUT
931	dolog (
932	"%s: write size %d ret %d total sw %d\n",
933	SW_NAME (sw),
934	size >> sw->info.shift,
935	ret,
936	sw->total_hw_samples_mixed
937	);
938	#endif
939
940	return ret << sw->info.shift;
941	}
942
943	#ifdef DEBUG_AUDIO
944	static void audio_pcm_print_info (const char cap, struct audio_pcm_info info)
945	{
946	dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
947	cap, info->bits, info->sign, info->freq, info->nchannels);
948	}
949	#endif
950
951	#define DAC
952	#include "audio_template.h"
953	#undef DAC
954	#include "audio_template.h"
955
956	int AUD_write (SWVoiceOut sw, void buf, int size)
957	{
958	int bytes;
959
960	if (!sw) {
961	/* XXX: Consider options */
962	return size;
963	}
964
965	if (!sw->hw->enabled) {
966	dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
967	return 0;
968	}
969
970	bytes = sw->hw->pcm_ops->write (sw, buf, size);
971	return bytes;
972	}
973
974	int AUD_read (SWVoiceIn sw, void buf, int size)
975	{
976	int bytes;
977
978	if (!sw) {
979	/* XXX: Consider options */
980	return size;
981	}
982
983	if (!sw->hw->enabled) {
984	dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
985	return 0;
986	}
987
988	bytes = sw->hw->pcm_ops->read (sw, buf, size);
989	return bytes;
990	}
991
992	int AUD_get_buffer_size_out (SWVoiceOut *sw)
993	{
994	return sw->hw->samples << sw->hw->info.shift;
995	}
996
997	void AUD_set_active_out (SWVoiceOut *sw, int on)
998	{
999	HWVoiceOut *hw;
1000
1001	if (!sw) {
1002	return;
1003	}
1004
1005	hw = sw->hw;
1006	if (sw->active != on) {
1007	SWVoiceOut *temp_sw;
1008	SWVoiceCap *sc;
1009
1010	if (on) {
1011	hw->pending_disable = 0;
1012	if (!hw->enabled) {
1013	hw->enabled = 1;
1014	hw->pcm_ops->ctl_out (hw, VOICE_ENABLE);
1015	}
1016	}
1017	else {
1018	if (hw->enabled) {
1019	int nb_active = 0;
1020
1021	for (temp_sw = hw->sw_head.lh_first; temp_sw;
1022	temp_sw = temp_sw->entries.le_next) {
1023	nb_active += temp_sw->active != 0;
1024	}
1025
1026	hw->pending_disable = nb_active == 1;
1027	}
1028	}
1029
1030	for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1031	sc->sw.active = hw->enabled;
1032	if (hw->enabled) {
1033	audio_capture_maybe_changed (sc->cap, 1);
1034	}
1035	}
1036	sw->active = on;
1037	}
1038	}
1039
1040	void AUD_set_active_in (SWVoiceIn *sw, int on)
1041	{
1042	HWVoiceIn *hw;
1043
1044	if (!sw) {
1045	return;
1046	}
1047
1048	hw = sw->hw;
1049	if (sw->active != on) {
1050	SWVoiceIn *temp_sw;
1051
1052	if (on) {
1053	if (!hw->enabled) {
1054	hw->enabled = 1;
1055	hw->pcm_ops->ctl_in (hw, VOICE_ENABLE);
1056	}
1057	sw->total_hw_samples_acquired = hw->total_samples_captured;
1058	}
1059	else {
1060	if (hw->enabled) {
1061	int nb_active = 0;
1062
1063	for (temp_sw = hw->sw_head.lh_first; temp_sw;
1064	temp_sw = temp_sw->entries.le_next) {
1065	nb_active += temp_sw->active != 0;
1066	}
1067
1068	if (nb_active == 1) {
1069	hw->enabled = 0;
1070	hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1071	}
1072	}
1073	}
1074	sw->active = on;
1075	}
1076	}
1077
1078	static int audio_get_avail (SWVoiceIn *sw)
1079	{
1080	int live;
1081
1082	if (!sw) {
1083	return 0;
1084	}
1085
1086	live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1087	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > sw->hw->samples)) {
1088	dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1089	return 0;
1090	}
1091
1092	ldebug (
1093	"%s: get_avail live %d ret %lld\n",
1094	SW_NAME (sw),
1095	live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1096	);
1097
1098	return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1099	}
1100
1101	static int audio_get_free (SWVoiceOut *sw)
1102	{
1103	int live, dead;
1104
1105	if (!sw) {
1106	return 0;
1107	}
1108
1109	live = sw->total_hw_samples_mixed;
1110
1111	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > sw->hw->samples)) {
1112	dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1113	return 0;
1114	}
1115
1116	dead = sw->hw->samples - live;
1117
1118	#ifdef DEBUG_OUT
1119	dolog ("%s: get_free live %d dead %d ret %lld\n",
1120	SW_NAME (sw),
1121	live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1122	#endif
1123
1124	return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1125	}
1126
1127	static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1128	{
1129	int n;
1130
1131	if (hw->enabled) {
1132	SWVoiceCap *sc;
1133
1134	for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1135	SWVoiceOut *sw = &sc->sw;
1136	int rpos2 = rpos;
1137
1138	n = samples;
1139	while (n) {
1140	int till_end_of_hw = hw->samples - rpos2;
1141	int to_write = audio_MIN (till_end_of_hw, n);
1142	int bytes = to_write << hw->info.shift;
1143	int written;
1144
1145	sw->buf = hw->mix_buf + rpos2;
1146	written = audio_pcm_sw_write (sw, NULL, bytes);
1147	if (written - bytes) {
1148	dolog ("Could not mix %d bytes into a capture "
1149	"buffer, mixed %d\n",
1150	bytes, written);
1151	break;
1152	}
1153	n -= to_write;
1154	rpos2 = (rpos2 + to_write) % hw->samples;
1155	}
1156	}
1157	}
1158
1159	n = audio_MIN (samples, hw->samples - rpos);
1160	mixeng_sniff_and_clear (hw, hw->mix_buf + rpos, n);
1161	mixeng_sniff_and_clear (hw, hw->mix_buf, samples - n);
1162	}
1163
1164	static void audio_run_out (AudioState *s)
1165	{
1166	HWVoiceOut *hw = NULL;
1167	SWVoiceOut *sw;
1168
1169	while ((hw = audio_pcm_hw_find_any_enabled_out (s, hw))) {
1170	int played;
1171	int live, free, nb_live, cleanup_required, prev_rpos;
1172
1173	live = audio_pcm_hw_get_live_out2 (hw, &nb_live);
1174	if (!nb_live) {
1175	live = 0;
1176	}
1177
1178	if (audio_bug (AUDIO_FUNC, live < 0 \|\| live > hw->samples)) {
1179	dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1180	continue;
1181	}
1182
1183	if (hw->pending_disable && !nb_live) {
1184	SWVoiceCap *sc;
1185	#ifdef DEBUG_OUT
1186	dolog ("Disabling voice\n");
1187	#endif
1188	hw->enabled = 0;
1189	hw->pending_disable = 0;
1190	hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1191	for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1192	sc->sw.active = 0;
1193	audio_recalc_and_notify_capture (sc->cap);
1194	}
1195	continue;
1196	}
1197
1198	if (!live) {
1199	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1200	if (sw->active) {
1201	free = audio_get_free (sw);
1202	if (free > 0) {
1203	sw->callback.fn (sw->callback.opaque, free);
1204	}
1205	}
1206	}
1207	continue;
1208	}
1209
1210	prev_rpos = hw->rpos;
1211	played = hw->pcm_ops->run_out (hw);
1212	if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1213	dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1214	hw->rpos, hw->samples, played);
1215	hw->rpos = 0;
1216	}
1217
1218	#ifdef DEBUG_OUT
1219	dolog ("played=%d\n", played);
1220	#endif
1221
1222	if (played) {
1223	hw->ts_helper += played;
1224	audio_capture_mix_and_clear (hw, prev_rpos, played);
1225	}
1226
1227	cleanup_required = 0;
1228	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1229	if (!sw->active && sw->empty) {
1230	continue;
1231	}
1232
1233	if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1234	dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1235	played, sw->total_hw_samples_mixed);
1236	played = sw->total_hw_samples_mixed;
1237	}
1238
1239	sw->total_hw_samples_mixed -= played;
1240
1241	if (!sw->total_hw_samples_mixed) {
1242	sw->empty = 1;
1243	cleanup_required \|= !sw->active && !sw->callback.fn;
1244	}
1245
1246	if (sw->active) {
1247	free = audio_get_free (sw);
1248	if (free > 0) {
1249	sw->callback.fn (sw->callback.opaque, free);
1250	}
1251	}
1252	}
1253
1254	if (cleanup_required) {
1255	SWVoiceOut *sw1;
1256
1257	sw = hw->sw_head.lh_first;
1258	while (sw) {
1259	sw1 = sw->entries.le_next;
1260	if (!sw->active && !sw->callback.fn) {
1261	#ifdef DEBUG_PLIVE
1262	dolog ("Finishing with old voice\n");
1263	#endif
1264	audio_close_out (s, sw);
1265	}
1266	sw = sw1;
1267	}
1268	}
1269	}
1270	}
1271
1272	static void audio_run_in (AudioState *s)
1273	{
1274	HWVoiceIn *hw = NULL;
1275
1276	while ((hw = audio_pcm_hw_find_any_enabled_in (s, hw))) {
1277	SWVoiceIn *sw;
1278	int captured, min;
1279
1280	captured = hw->pcm_ops->run_in (hw);
1281
1282	min = audio_pcm_hw_find_min_in (hw);
1283	hw->total_samples_captured += captured - min;
1284	hw->ts_helper += captured;
1285
1286	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1287	sw->total_hw_samples_acquired -= min;
1288
1289	if (sw->active) {
1290	int avail;
1291
1292	avail = audio_get_avail (sw);
1293	if (avail > 0) {
1294	sw->callback.fn (sw->callback.opaque, avail);
1295	}
1296	}
1297	}
1298	}
1299	}
1300
1301	static void audio_run_capture (AudioState *s)
1302	{
1303	CaptureVoiceOut *cap;
1304
1305	for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1306	int live, rpos, captured;
1307	HWVoiceOut *hw = &cap->hw;
1308	SWVoiceOut *sw;
1309
1310	captured = live = audio_pcm_hw_get_live_out (hw);
1311	rpos = hw->rpos;
1312	while (live) {
1313	int left = hw->samples - rpos;
1314	int to_capture = audio_MIN (live, left);
1315	st_sample_t *src;
1316	struct capture_callback *cb;
1317
1318	src = hw->mix_buf + rpos;
1319	hw->clip (cap->buf, src, to_capture);
1320	mixeng_sniff_and_clear (hw, src, to_capture);
1321
1322	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1323	cb->ops.capture (cb->opaque, cap->buf,
1324	to_capture << hw->info.shift);
1325	}
1326	rpos = (rpos + to_capture) % hw->samples;
1327	live -= to_capture;
1328	}
1329	hw->rpos = rpos;
1330
1331	for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1332	if (!sw->active && sw->empty) {
1333	continue;
1334	}
1335
1336	if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1337	dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1338	captured, sw->total_hw_samples_mixed);
1339	captured = sw->total_hw_samples_mixed;
1340	}
1341
1342	sw->total_hw_samples_mixed -= captured;
1343	sw->empty = sw->total_hw_samples_mixed == 0;
1344	}
1345	}
1346	}
1347
1348	static void audio_timer (void *opaque)
1349	{
1350	AudioState *s = opaque;
1351
1352	audio_run_out (s);
1353	audio_run_in (s);
1354	audio_run_capture (s);
1355
1356	TMTimerSet (s->ts, TMTimerGet (s->ts) + conf.period.ticks);
1357	}
1358
1359	static struct audio_option audio_options[] = {
1360	/* DAC */
1361	{"DAC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_out.enabled,
1362	"Use fixed settings for host DAC", NULL, 0},
1363
1364	{"DAC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_out.settings.freq,
1365	"Frequency for fixed host DAC", NULL, 0},
1366
1367	{"DAC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_out.settings.fmt,
1368	"Format for fixed host DAC", NULL, 0},
1369
1370	{"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_out.settings.nchannels,
1371	"Number of channels for fixed DAC (1 - mono, 2 - stereo)", NULL, 0},
1372
1373	{"DAC_VOICES", AUD_OPT_INT, &conf.fixed_out.nb_voices,
1374	"Number of voices for DAC", NULL, 0},
1375
1376	/* ADC */
1377	{"ADC_FIXED_SETTINGS", AUD_OPT_BOOL, &conf.fixed_in.enabled,
1378	"Use fixed settings for host ADC", NULL, 0},
1379
1380	{"ADC_FIXED_FREQ", AUD_OPT_INT, &conf.fixed_in.settings.freq,
1381	"Frequency for fixed host ADC", NULL, 0},
1382
1383	{"ADC_FIXED_FMT", AUD_OPT_FMT, &conf.fixed_in.settings.fmt,
1384	"Format for fixed host ADC", NULL, 0},
1385
1386	{"ADC_FIXED_CHANNELS", AUD_OPT_INT, &conf.fixed_in.settings.nchannels,
1387	"Number of channels for fixed ADC (1 - mono, 2 - stereo)", NULL, 0},
1388
1389	{"ADC_VOICES", AUD_OPT_INT, &conf.fixed_in.nb_voices,
1390	"Number of voices for ADC", NULL, 0},
1391
1392	/* Misc */
1393	{"TIMER_PERIOD", AUD_OPT_INT, &conf.period.hz,
1394	"Timer period in HZ (0 - use lowest possible)", NULL, 0},
1395
1396	{"PLIVE", AUD_OPT_BOOL, &conf.plive,
1397	"(undocumented)", NULL, 0},
1398
1399	{NULL, 0, NULL, NULL, NULL, 0}
1400	};
1401
1402	static int audio_driver_init (AudioState s, struct audio_driver drv)
1403	{
1404	if (drv->options) {
1405	audio_process_options (drv->name, drv->options);
1406	}
1407	s->drv_opaque = drv->init ();
1408
1409	if (s->drv_opaque) {
1410	audio_init_nb_voices_out (s, drv);
1411	audio_init_nb_voices_in (s, drv);
1412	s->drv = drv;
1413	return 0;
1414	}
1415	else {
1416	dolog ("Could not init `%s' audio driver\n", drv->name);
1417	return -1;
1418	}
1419	}
1420
1421	static void audio_vm_change_state_handler (void *opaque, int running)
1422	{
1423	AudioState *s = opaque;
1424	HWVoiceOut *hwo = NULL;
1425	HWVoiceIn *hwi = NULL;
1426	int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1427
1428	while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1429	hwo->pcm_ops->ctl_out (hwo, op);
1430	}
1431
1432	while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1433	hwi->pcm_ops->ctl_in (hwi, op);
1434	}
1435	}
1436
1437	static void audio_atexit (void)
1438	{
1439	AudioState *s = &glob_audio_state;
1440	HWVoiceOut *hwo = NULL;
1441	HWVoiceIn *hwi = NULL;
1442
1443	while ((hwo = audio_pcm_hw_find_any_enabled_out (s, hwo))) {
1444	SWVoiceCap *sc;
1445
1446	hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1447	hwo->pcm_ops->fini_out (hwo);
1448
1449	for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1450	CaptureVoiceOut *cap = sc->cap;
1451	struct capture_callback *cb;
1452
1453	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1454	cb->ops.destroy (cb->opaque);
1455	}
1456	}
1457	}
1458
1459	while ((hwi = audio_pcm_hw_find_any_enabled_in (s, hwi))) {
1460	hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1461	hwi->pcm_ops->fini_in (hwi);
1462	}
1463
1464	if (s->drv) {
1465	s->drv->fini (s->drv_opaque);
1466	}
1467	}
1468
1469	void AUD_register_card (const char name, QEMUSoundCard card)
1470	{
1471	AudioState *s = &glob_audio_state;
1472	card->audio = s;
1473	card->name = qemu_strdup (name);
1474	memset (&card->entries, 0, sizeof (card->entries));
1475	LIST_INSERT_HEAD (&s->card_head, card, entries);
1476	}
1477
1478	void AUD_remove_card (QEMUSoundCard *card)
1479	{
1480	LIST_REMOVE (card, entries);
1481	card->audio = NULL;
1482	qemu_free (card->name);
1483	}
1484
1485	static void audio_timer_helper (PPDMDRVINS pDrvIns, PTMTIMER pTimer)
1486	{
1487	AudioState *s = &glob_audio_state;
1488	audio_timer (s);
1489	}
1490
1491	static int AUD_init (PPDMDRVINS pDrvIns, const char *drvname)
1492	{
1493	size_t i;
1494	int done = 0;
1495	AudioState *s = &glob_audio_state;
1496	int rc;
1497
1498	LIST_INIT (&s->hw_head_out);
1499	LIST_INIT (&s->hw_head_in);
1500	LIST_INIT (&s->cap_head);
1501
1502	rc = pDrvIns->pDrvHlp->pfnTMTimerCreate (pDrvIns, TMCLOCK_VIRTUAL,
1503	audio_timer_helper, "Audio timer", &s->ts);
1504	if (VBOX_FAILURE (rc))
1505	return rc;
1506
1507	audio_process_options ("AUDIO", audio_options);
1508
1509	s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1510	s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1511
1512	if (s->nb_hw_voices_out <= 0) {
1513	dolog ("Bogus number of playback voices %d, setting to 1\n",
1514	s->nb_hw_voices_out);
1515	s->nb_hw_voices_out = 1;
1516	}
1517
1518	if (s->nb_hw_voices_in <= 0) {
1519	dolog ("Bogus number of capture voices %d, setting to 0\n",
1520	s->nb_hw_voices_in);
1521	s->nb_hw_voices_in = 0;
1522	}
1523
1524	if (drvname) {
1525	int found = 0;
1526
1527	for (i = 0; i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1528	if (!strcmp (drvname, drvtab[i]->name)) {
1529	done = !audio_driver_init (s, drvtab[i]);
1530	found = 1;
1531	break;
1532	}
1533	}
1534
1535	if (!found) {
1536	dolog ("Unknown audio driver `%s'\n", drvname);
1537	}
1538	}
1539
1540	if (!done) {
1541	for (i = 0; !done && i < sizeof (drvtab) / sizeof (drvtab[0]); i++) {
1542	if (drvtab[i]->can_be_default) {
1543	done = !audio_driver_init (s, drvtab[i]);
1544	}
1545	}
1546	}
1547
1548	if (!done) {
1549	done = !audio_driver_init (s, &no_audio_driver);
1550	if (!done) {
1551	dolog ("Could not initialize audio subsystem\n");
1552	}
1553	else {
1554	dolog ("warning: Using timer based audio emulation\n");
1555	}
1556	}
1557
1558	if (done) {
1559	if (conf.period.hz <= 0) {
1560	if (conf.period.hz < 0) {
1561	dolog ("warning: Timer period is negative - %d "
1562	"treating as zero\n",
1563	conf.period.hz);
1564	}
1565	conf.period.ticks = 1;
1566	}
1567	else {
1568	conf.period.ticks = pDrvIns->pDrvHlp->pfnTMGetVirtualFreq (pDrvIns)
1569	/ conf.period.hz;
1570	}
1571	}
1572	else {
1573	/* XXX */
1574	rc = TMTimerDestroy (s->ts);
1575	return rc;
1576	}
1577
1578	LIST_INIT (&s->card_head);
1579	TMTimerSet (s->ts, TMTimerGet (s->ts) + conf.period.ticks);
1580	return VINF_SUCCESS;
1581	}
1582
1583	CaptureVoiceOut *AUD_add_capture (
1584	AudioState *s,
1585	audsettings_t *as,
1586	struct audio_capture_ops *ops,
1587	void *cb_opaque
1588	)
1589	{
1590	CaptureVoiceOut *cap;
1591	struct capture_callback *cb;
1592
1593	if (!s) {
1594	/* XXX suppress */
1595	s = &glob_audio_state;
1596	}
1597
1598	if (audio_validate_settings (as)) {
1599	dolog ("Invalid settings were passed when trying to add capture\n");
1600	audio_print_settings (as);
1601	goto err0;
1602	}
1603
1604	cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
1605	if (!cb) {
1606	dolog ("Could not allocate capture callback information, size %u\n",
1607	sizeof (*cb));
1608	goto err0;
1609	}
1610	cb->ops = *ops;
1611	cb->opaque = cb_opaque;
1612
1613	cap = audio_pcm_capture_find_specific (s, as);
1614	if (cap) {
1615	LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1616	return cap;
1617	}
1618	else {
1619	HWVoiceOut *hw;
1620	CaptureVoiceOut *cap;
1621
1622	cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
1623	if (!cap) {
1624	dolog ("Could not allocate capture voice, size %u\n",
1625	sizeof (*cap));
1626	goto err1;
1627	}
1628
1629	hw = &cap->hw;
1630	LIST_INIT (&hw->sw_head);
1631	LIST_INIT (&cap->cb_head);
1632
1633	/* XXX find a more elegant way */
1634	hw->samples = 4096 * 4;
1635	hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
1636	sizeof (st_sample_t));
1637	if (!hw->mix_buf) {
1638	dolog ("Could not allocate capture mix buffer (%d samples)\n",
1639	hw->samples);
1640	goto err2;
1641	}
1642
1643	audio_pcm_init_info (&hw->info, as);
1644
1645	cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
1646	if (!cap->buf) {
1647	dolog ("Could not allocate capture buffer "
1648	"(%d samples, each %d bytes)\n",
1649	hw->samples, 1 << hw->info.shift);
1650	goto err3;
1651	}
1652
1653	hw->clip = mixeng_clip
1654	[hw->info.nchannels == 2]
1655	[hw->info.sign]
1656	[hw->info.swap_endianness]
1657	[hw->info.bits == 16];
1658
1659	LIST_INSERT_HEAD (&s->cap_head, cap, entries);
1660	LIST_INSERT_HEAD (&cap->cb_head, cb, entries);
1661
1662	hw = NULL;
1663	while ((hw = audio_pcm_hw_find_any_out (s, hw))) {
1664	audio_attach_capture (s, hw);
1665	}
1666	return cap;
1667
1668	err3:
1669	qemu_free (cap->hw.mix_buf);
1670	err2:
1671	qemu_free (cap);
1672	err1:
1673	qemu_free (cb);
1674	err0:
1675	return NULL;
1676	}
1677	}
1678
1679	void AUD_del_capture (CaptureVoiceOut cap, void cb_opaque)
1680	{
1681	struct capture_callback *cb;
1682
1683	for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1684	if (cb->opaque == cb_opaque) {
1685	cb->ops.destroy (cb_opaque);
1686	LIST_REMOVE (cb, entries);
1687	qemu_free (cb);
1688
1689	if (!cap->cb_head.lh_first) {
1690	SWVoiceOut sw = cap->hw.sw_head.lh_first, sw1;
1691
1692	while (sw) {
1693	SWVoiceCap sc = (SWVoiceCap ) sw;
1694	#ifdef DEBUG_CAPTURE
1695	dolog ("freeing %s\n", sw->name);
1696	#endif
1697
1698	sw1 = sw->entries.le_next;
1699	if (sw->rate) {
1700	st_rate_stop (sw->rate);
1701	sw->rate = NULL;
1702	}
1703	LIST_REMOVE (sw, entries);
1704	LIST_REMOVE (sc, entries);
1705	qemu_free (sc);
1706	sw = sw1;
1707	}
1708	LIST_REMOVE (cap, entries);
1709	qemu_free (cap);
1710	}
1711	return;
1712	}
1713	}
1714	}
1715
1716	void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
1717	{
1718	if (sw)
1719	{
1720	sw->vol.mute = mute;
1721	sw->vol.l = (uint32_t)lvol * 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1722	sw->vol.r = (uint32_t)rvol * 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1723	}
1724	}
1725
1726	void AUD_set_volume (audmixerctl_t mt, int mute, uint8_t lvol, uint8_t *rvol)
1727	{
1728	volume_t *vol = NULL;
1729	const char *name;
1730
1731	switch (mt)
1732	{
1733	case AUD_MIXER_VOLUME:
1734	name = "MASTER";
1735	vol = &pcm_out_volume;
1736	break;
1737	case AUD_MIXER_PCM:
1738	name = "PCM_OUT";
1739	break;
1740	case AUD_MIXER_LINE_IN:
1741	name = "LINE_IN";
1742	break;
1743	default:
1744	return;
1745
1746	}
1747
1748	if (vol)
1749	{
1750	vol->mute = *mute;
1751	vol->l = ((uint32_t)lvol) 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1752	vol->r = ((uint32_t)rvol) 0x808080; /* maximum is INT_MAX = 0x7fffffff */
1753	}
1754	#if 0
1755	LogRel(("AUDIO: Set '%s' volume to %d%%/%d%%\n", name, (lvol100)/255, (rvol100)/255l));
1756	#endif
1757	}
1758
1759	void AUD_set_record_source (audrecsource_t ars, audrecsource_t als)
1760	{
1761	LogRel(("AUDIO: set_record_source ars=%d als=%d (not implemented)\n", ars, als));
1762	}
1763
1764	/**
1765	* Queries an interface to the driver.
1766	*
1767	* @returns Pointer to interface.
1768	* @returns NULL if the interface was not supported by the driver.
1769	* @param pInterface Pointer to this interface structure.
1770	* @param enmInterface The requested interface identification.
1771	* @thread Any thread.
1772	*/
1773	static DECLCALLBACK(void *) drvAudioQueryInterface(PPDMIBASE pInterface,
1774	PDMINTERFACE enmInterface)
1775	{
1776	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
1777	PDRVAUDIO pData = PDMINS2DATA(pDrvIns, PDRVAUDIO);
1778	switch (enmInterface)
1779	{
1780	case PDMINTERFACE_BASE:
1781	return &pDrvIns->IBase;
1782	case PDMINTERFACE_AUDIO_CONNECTOR:
1783	return &pData->IAudioConnector;
1784	default:
1785	return NULL;
1786	}
1787	}
1788
1789	/**
1790	* Power Off notification.
1791	*
1792	* @param pDrvIns The driver instance data.
1793	*/
1794	static DECLCALLBACK(void) drvAudioPowerOff(PPDMDRVINS pDrvIns)
1795	{
1796	AudioState *s = &glob_audio_state;
1797	audio_vm_change_state_handler (s, 0);
1798	}
1799
1800	/**
1801	* Destruct a driver instance.
1802	*
1803	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
1804	* resources can be freed correctly.
1805	*
1806	* @param pDrvIns The driver instance data.
1807	*/
1808	static DECLCALLBACK(void) drvAudioDestruct(PPDMDRVINS pDrvIns)
1809	{
1810	LogFlow(("drvAUDIODestruct:\n"));
1811
1812	audio_atexit ();
1813	}
1814
1815	/**
1816	* Construct an AUDIO driver instance.
1817	*
1818	* @returns VBox status.
1819	* @param pDrvIns The driver instance data.
1820	* If the registration structure is needed, pDrvIns->pDrvReg points to it.
1821	* @param pCfgHandle Configuration node handle for the driver. Use this to obtain the configuration
1822	* of the driver instance. It's also found in pDrvIns->pCfgHandle, but like
1823	* iInstance it's expected to be used a bit in this function.
1824	*/
1825	static DECLCALLBACK(int) drvAudioConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle)
1826	{
1827	int rc;
1828	PDRVAUDIO pData = PDMINS2DATA(pDrvIns, PDRVAUDIO);
1829	char *drvname;
1830
1831	LogFlow(("drvAUDIOConstruct:\n"));
1832	/*
1833	* Validate the config.
1834	*/
1835	if (!CFGMR3AreValuesValid(pCfgHandle, "AudioDriver\0"))
1836	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
1837
1838	/*
1839	* Init the static parts.
1840	*/
1841	pData->pDrvIns = pDrvIns;
1842	/* IBase */
1843	pDrvIns->IBase.pfnQueryInterface = drvAudioQueryInterface;
1844	/* IAudio */
1845	/* pData->IAudioConnector.pfn; */
1846
1847	glob_audio_state.pDrvIns = pDrvIns;
1848
1849	rc = CFGMR3QueryStringAlloc (pCfgHandle, "AudioDriver", &drvname);
1850	if (VBOX_FAILURE (rc))
1851	return rc;
1852
1853	LogRel(("Using Audio driver '%s'\n", drvname));
1854
1855	rc = AUD_init (pDrvIns, drvname);
1856	if (VBOX_FAILURE (rc))
1857	return rc;
1858
1859	MMR3HeapFree (drvname);
1860
1861	return VINF_SUCCESS;
1862	}
1863
1864	/**
1865	* Suspend notification.
1866	*
1867	* @returns VBox status.
1868	* @param pDrvIns The driver instance data.
1869	*/
1870	static DECLCALLBACK(void) drvAudioSuspend(PPDMDRVINS pDrvIns)
1871	{
1872	AudioState *s = &glob_audio_state;
1873	audio_vm_change_state_handler (s, 0);
1874	}
1875
1876	/**
1877	* Resume notification.
1878	*
1879	* @returns VBox status.
1880	* @param pDrvIns The driver instance data.
1881	*/
1882	static DECLCALLBACK(void) audioResume(PPDMDRVINS pDrvIns)
1883	{
1884	AudioState *s = &glob_audio_state;
1885	audio_vm_change_state_handler (s, 1);
1886	}
1887
1888	/**
1889	* Audio driver registration record.
1890	*/
1891	const PDMDRVREG g_DrvAUDIO =
1892	{
1893	/* u32Version */
1894	PDM_DRVREG_VERSION,
1895	/* szDriverName */
1896	"AUDIO",
1897	/* pszDescription */
1898	"AUDIO Driver",
1899	/* fFlags */
1900	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1901	/* fClass. */
1902	PDM_DRVREG_CLASS_AUDIO,
1903	/* cMaxInstances */
1904	1,
1905	/* cbInstance */
1906	sizeof(DRVAUDIO),
1907	/* pfnConstruct */
1908	drvAudioConstruct,
1909	/* pfnDestruct */
1910	drvAudioDestruct,
1911	/* pfnIOCtl */
1912	NULL,
1913	/* pfnPowerOn */
1914	NULL,
1915	/* pfnReset */
1916	NULL,
1917	/* pfnSuspend */
1918	drvAudioSuspend,
1919	/* pfnResume */
1920	audioResume,
1921	/* pfnDetach */
1922	NULL,
1923	/* pfnPowerOff */
1924	drvAudioPowerOff
1925	};

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source: vbox/trunk/src/VBox/Devices/Audio/audio.c@ 355

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