1/*
2 * QEMU Audio subsystem
3 *
4 * Copyright (c) 2007-2008 The Android Open Source Project
5 * Copyright (c) 2003-2005 Vassili Karpov (malc)
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25#include "hw/hw.h"
26#include "audio.h"
27#include "monitor.h"
28#include "qemu-timer.h"
29#include "sysemu.h"
30
31#define AUDIO_CAP "audio"
32#include "audio_int.h"
33#include "android/utils/system.h"
34#include "qemu_debug.h"
35#include "android/android.h"
36
37/* #define DEBUG_PLIVE */
38/* #define DEBUG_LIVE */
39/* #define DEBUG_OUT */
40/* #define DEBUG_CAPTURE */
41
42#define SW_NAME(sw) (sw)->name ? (sw)->name : "unknown"
43
44static struct audio_driver *drvtab[] = {
45#ifdef CONFIG_PULSEAUDIO
46    &pa_audio_driver,
47#endif
48#ifdef CONFIG_ESD
49    &esd_audio_driver,
50#endif
51#ifdef CONFIG_ALSA
52    &alsa_audio_driver,
53#endif
54#ifdef CONFIG_COREAUDIO
55    &coreaudio_audio_driver,
56#endif
57#ifdef CONFIG_DSOUND
58    &dsound_audio_driver,
59#endif
60#ifdef CONFIG_FMOD
61    &fmod_audio_driver,
62#endif
63#ifdef CONFIG_WINAUDIO
64    &win_audio_driver,
65#endif
66#ifdef CONFIG_OSS
67    &oss_audio_driver,
68#endif
69    &no_audio_driver,
70#if 0  /* disabled WAV audio for now - until we find a user-friendly way to use it */
71    &wav_audio_driver
72#endif
73};
74
75
76int
77audio_get_backend_count( int  is_input )
78{
79    int  nn, count = 0;
80
81    for (nn = 0; nn < sizeof(drvtab)/sizeof(drvtab[0]); nn++)
82    {
83        if (is_input) {
84            if ( drvtab[nn]->max_voices_in > 0 )
85                count += 1;
86        } else {
87            if ( drvtab[nn]->max_voices_out > 0 )
88                count += 1;
89        }
90    }
91    return  count;
92}
93
94const char*
95audio_get_backend_name( int   is_input, int  index, const char*  *pinfo )
96{
97    int  nn;
98
99    index += 1;
100    for (nn = 0; nn < sizeof(drvtab)/sizeof(drvtab[0]); nn++)
101    {
102        if (is_input) {
103            if ( drvtab[nn]->max_voices_in > 0 ) {
104                if ( --index == 0 ) {
105                    *pinfo = drvtab[nn]->descr;
106                    return drvtab[nn]->name;
107                }
108            }
109        } else {
110            if ( drvtab[nn]->max_voices_out > 0 ) {
111                if ( --index == 0 ) {
112                    *pinfo = drvtab[nn]->descr;
113                    return drvtab[nn]->name;
114                }
115            }
116        }
117    }
118    *pinfo = NULL;
119    return  NULL;
120}
121
122
123int
124audio_check_backend_name( int  is_input, const char*  name )
125{
126    int  nn;
127
128    for (nn = 0; nn < sizeof(drvtab)/sizeof(drvtab[0]); nn++)
129    {
130        if ( !strcmp(drvtab[nn]->name, name) ) {
131            if (is_input) {
132                if (drvtab[nn]->max_voices_in > 0)
133                    return 1;
134            } else {
135                if (drvtab[nn]->max_voices_out > 0)
136                    return 1;
137            }
138            break;
139        }
140    }
141    return 0;
142}
143
144
145struct fixed_settings {
146    int enabled;
147    int nb_voices;
148    int greedy;
149    struct audsettings settings;
150};
151
152static struct {
153    struct fixed_settings fixed_out;
154    struct fixed_settings fixed_in;
155    union {
156        int hertz;
157        int64_t ticks;
158    } period;
159    int plive;
160    int log_to_monitor;
161    int try_poll_in;
162    int try_poll_out;
163} conf = {
164    .fixed_out = { /* DAC fixed settings */
165        .enabled = 1,
166        .nb_voices = 1,
167        .greedy = 1,
168        .settings = {
169            .freq = 44100,
170            .nchannels = 2,
171            .fmt = AUD_FMT_S16,
172            .endianness =  AUDIO_HOST_ENDIANNESS,
173        }
174    },
175
176    .fixed_in = { /* ADC fixed settings */
177        .enabled = 1,
178        .nb_voices = 1,
179        .greedy = 1,
180        .settings = {
181            .freq = 44100,
182            .nchannels = 2,
183            .fmt = AUD_FMT_S16,
184            .endianness = AUDIO_HOST_ENDIANNESS,
185        }
186    },
187
188    .period = { .hertz = 250 },
189    .plive = 0,
190    .log_to_monitor = 0,
191    .try_poll_in = 1,
192    .try_poll_out = 1,
193};
194
195static AudioState glob_audio_state;
196
197struct mixeng_volume nominal_volume = {
198    .mute = 0,
199#ifdef FLOAT_MIXENG
200    .r = 1.0,
201    .l = 1.0,
202#else
203    .r = 1ULL << 32,
204    .l = 1ULL << 32,
205#endif
206};
207
208#ifdef AUDIO_IS_FLAWLESS_AND_NO_CHECKS_ARE_REQURIED
209#error No its not
210#else
211static void audio_print_options (const char *prefix,
212                                 struct audio_option *opt);
213
214int audio_bug (const char *funcname, int cond)
215{
216    if (cond) {
217        static int shown;
218
219        AUD_log (NULL, "A bug was just triggered in %s\n", funcname);
220        if (!shown) {
221            struct audio_driver *d;
222
223            shown = 1;
224            AUD_log (NULL, "Save all your work and restart without audio\n");
225            AUD_log (NULL, "Please send bug report to av1474@comtv.ru\n");
226            AUD_log (NULL, "I am sorry\n");
227            d = glob_audio_state.drv;
228            if (d) {
229                audio_print_options (d->name, d->options);
230            }
231        }
232        AUD_log (NULL, "Context:\n");
233
234#if defined AUDIO_BREAKPOINT_ON_BUG
235#  if defined HOST_I386
236#    if defined __GNUC__
237        __asm__ ("int3");
238#    elif defined _MSC_VER
239        _asm _emit 0xcc;
240#    else
241        abort ();
242#    endif
243#  else
244        abort ();
245#  endif
246#endif
247    }
248
249    return cond;
250}
251#endif
252
253static inline int audio_bits_to_index (int bits)
254{
255    switch (bits) {
256    case 8:
257        return 0;
258
259    case 16:
260        return 1;
261
262    case 32:
263        return 2;
264
265    default:
266        audio_bug ("bits_to_index", 1);
267        AUD_log (NULL, "invalid bits %d\n", bits);
268        return 0;
269    }
270}
271
272void *audio_calloc (const char *funcname, int nmemb, size_t size)
273{
274    int cond;
275    size_t len;
276
277    len = nmemb * size;
278    cond = !nmemb || !size;
279    cond |= nmemb < 0;
280    cond |= len < size;
281
282    if (audio_bug ("audio_calloc", cond)) {
283        AUD_log (NULL, "%s passed invalid arguments to audio_calloc\n",
284                 funcname);
285        AUD_log (NULL, "nmemb=%d size=%zu (len=%zu)\n", nmemb, size, len);
286        return NULL;
287    }
288
289    return qemu_mallocz (len);
290}
291
292static char *audio_alloc_prefix (const char *s)
293{
294    const char qemu_prefix[] = "QEMU_";
295    size_t len, i;
296    char *r, *u;
297
298    if (!s) {
299        return NULL;
300    }
301
302    len = strlen (s);
303    r = qemu_malloc (len + sizeof (qemu_prefix));
304
305    u = r + sizeof (qemu_prefix) - 1;
306
307    pstrcpy (r, len + sizeof (qemu_prefix), qemu_prefix);
308    pstrcat (r, len + sizeof (qemu_prefix), s);
309
310    for (i = 0; i < len; ++i) {
311        u[i] = qemu_toupper(u[i]);
312    }
313
314    return r;
315}
316
317static const char *audio_audfmt_to_string (audfmt_e fmt)
318{
319    switch (fmt) {
320    case AUD_FMT_U8:
321        return "U8";
322
323    case AUD_FMT_U16:
324        return "U16";
325
326    case AUD_FMT_S8:
327        return "S8";
328
329    case AUD_FMT_S16:
330        return "S16";
331
332    case AUD_FMT_U32:
333        return "U32";
334
335    case AUD_FMT_S32:
336        return "S32";
337    }
338
339    dolog ("Bogus audfmt %d returning S16\n", fmt);
340    return "S16";
341}
342
343static audfmt_e audio_string_to_audfmt (const char *s, audfmt_e defval,
344                                        int *defaultp)
345{
346    if (!strcasecmp (s, "u8")) {
347        *defaultp = 0;
348        return AUD_FMT_U8;
349    }
350    else if (!strcasecmp (s, "u16")) {
351        *defaultp = 0;
352        return AUD_FMT_U16;
353    }
354    else if (!strcasecmp (s, "u32")) {
355        *defaultp = 0;
356        return AUD_FMT_U32;
357    }
358    else if (!strcasecmp (s, "s8")) {
359        *defaultp = 0;
360        return AUD_FMT_S8;
361    }
362    else if (!strcasecmp (s, "s16")) {
363        *defaultp = 0;
364        return AUD_FMT_S16;
365    }
366    else if (!strcasecmp (s, "s32")) {
367        *defaultp = 0;
368        return AUD_FMT_S32;
369    }
370    else {
371        dolog ("Bogus audio format `%s' using %s\n",
372               s, audio_audfmt_to_string (defval));
373        *defaultp = 1;
374        return defval;
375    }
376}
377
378static audfmt_e audio_get_conf_fmt (const char *envname,
379                                    audfmt_e defval,
380                                    int *defaultp)
381{
382    const char *var = getenv (envname);
383    if (!var) {
384        *defaultp = 1;
385        return defval;
386    }
387    return audio_string_to_audfmt (var, defval, defaultp);
388}
389
390static int audio_get_conf_int (const char *key, int defval, int *defaultp)
391{
392    int val;
393    char *strval;
394
395    strval = getenv (key);
396    if (strval) {
397        *defaultp = 0;
398        val = atoi (strval);
399        return val;
400    }
401    else {
402        *defaultp = 1;
403        return defval;
404    }
405}
406
407static const char *audio_get_conf_str (const char *key,
408                                       const char *defval,
409                                       int *defaultp)
410{
411    const char *val = getenv (key);
412    if (!val) {
413        *defaultp = 1;
414        return defval;
415    }
416    else {
417        *defaultp = 0;
418        return val;
419    }
420}
421
422/* defined in android_sdl.c */
423extern void  dprintn(const char*  fmt, ...);
424extern void  dprintnv(const char*  fmt, va_list  args);
425
426void AUD_vlog (const char *cap, const char *fmt, va_list ap)
427{
428    if (conf.log_to_monitor) {
429        if (cap) {
430            monitor_printf(cur_mon, "%s: ", cap);
431        }
432
433        monitor_vprintf(cur_mon, fmt, ap);
434    }
435    else {
436        if (!VERBOSE_CHECK(audio))
437            return;
438
439        if (cap) {
440            dprintn("%s: ", cap);
441        }
442
443        dprintnv(fmt, ap);
444    }
445}
446
447void AUD_log (const char *cap, const char *fmt, ...)
448{
449    va_list ap;
450
451    va_start (ap, fmt);
452    AUD_vlog (cap, fmt, ap);
453    va_end (ap);
454}
455
456static void audio_print_options (const char *prefix,
457                                 struct audio_option *opt)
458{
459    char *uprefix;
460
461    if (!prefix) {
462        dolog ("No prefix specified\n");
463        return;
464    }
465
466    if (!opt) {
467        dolog ("No options\n");
468        return;
469    }
470
471    uprefix = audio_alloc_prefix (prefix);
472
473    for (; opt->name; opt++) {
474        const char *state = "default";
475        printf ("  %s_%s: ", uprefix, opt->name);
476
477        if (opt->overriddenp && *opt->overriddenp) {
478            state = "current";
479        }
480
481        switch (opt->tag) {
482        case AUD_OPT_BOOL:
483            {
484                int *intp = opt->valp;
485                printf ("boolean, %s = %d\n", state, *intp ? 1 : 0);
486            }
487            break;
488
489        case AUD_OPT_INT:
490            {
491                int *intp = opt->valp;
492                printf ("integer, %s = %d\n", state, *intp);
493            }
494            break;
495
496        case AUD_OPT_FMT:
497            {
498                audfmt_e *fmtp = opt->valp;
499                printf (
500                    "format, %s = %s, (one of: U8 S8 U16 S16 U32 S32)\n",
501                    state,
502                    audio_audfmt_to_string (*fmtp)
503                    );
504            }
505            break;
506
507        case AUD_OPT_STR:
508            {
509                const char **strp = opt->valp;
510                printf ("string, %s = %s\n",
511                        state,
512                        *strp ? *strp : "(not set)");
513            }
514            break;
515
516        default:
517            printf ("???\n");
518            dolog ("Bad value tag for option %s_%s %d\n",
519                   uprefix, opt->name, opt->tag);
520            break;
521        }
522        printf ("    %s\n", opt->descr);
523    }
524
525    qemu_free (uprefix);
526}
527
528static void audio_process_options (const char *prefix,
529                                   struct audio_option *opt)
530{
531    char *optname;
532    const char qemu_prefix[] = "QEMU_";
533    size_t preflen, optlen;
534
535    if (audio_bug (AUDIO_FUNC, !prefix)) {
536        dolog ("prefix = NULL\n");
537        return;
538    }
539
540    if (audio_bug (AUDIO_FUNC, !opt)) {
541        dolog ("opt = NULL\n");
542        return;
543    }
544
545    preflen = strlen (prefix);
546
547    for (; opt->name; opt++) {
548        size_t len, i;
549        int def;
550
551        if (!opt->valp) {
552            dolog ("Option value pointer for `%s' is not set\n",
553                   opt->name);
554            continue;
555        }
556
557        len = strlen (opt->name);
558        /* len of opt->name + len of prefix + size of qemu_prefix
559         * (includes trailing zero) + zero + underscore (on behalf of
560         * sizeof) */
561        optlen = len + preflen + sizeof (qemu_prefix) + 1;
562        optname = qemu_malloc (optlen);
563
564        pstrcpy (optname, optlen, qemu_prefix);
565
566        /* copy while upper-casing, including trailing zero */
567        for (i = 0; i <= preflen; ++i) {
568            optname[i + sizeof (qemu_prefix) - 1] = qemu_toupper(prefix[i]);
569        }
570        pstrcat (optname, optlen, "_");
571        pstrcat (optname, optlen, opt->name);
572
573        def = 1;
574        switch (opt->tag) {
575        case AUD_OPT_BOOL:
576        case AUD_OPT_INT:
577            {
578                int *intp = opt->valp;
579                *intp = audio_get_conf_int (optname, *intp, &def);
580            }
581            break;
582
583        case AUD_OPT_FMT:
584            {
585                audfmt_e *fmtp = opt->valp;
586                *fmtp = audio_get_conf_fmt (optname, *fmtp, &def);
587            }
588            break;
589
590        case AUD_OPT_STR:
591            {
592                const char **strp = opt->valp;
593                *strp = audio_get_conf_str (optname, *strp, &def);
594            }
595            break;
596
597        default:
598            dolog ("Bad value tag for option `%s' - %d\n",
599                   optname, opt->tag);
600            break;
601        }
602
603        if (!opt->overriddenp) {
604            opt->overriddenp = &opt->overridden;
605        }
606        *opt->overriddenp = !def;
607        qemu_free (optname);
608    }
609}
610
611static void audio_print_settings (struct audsettings *as)
612{
613    dolog ("frequency=%d nchannels=%d fmt=", as->freq, as->nchannels);
614
615    switch (as->fmt) {
616    case AUD_FMT_S8:
617        AUD_log (NULL, "S8");
618        break;
619    case AUD_FMT_U8:
620        AUD_log (NULL, "U8");
621        break;
622    case AUD_FMT_S16:
623        AUD_log (NULL, "S16");
624        break;
625    case AUD_FMT_U16:
626        AUD_log (NULL, "U16");
627        break;
628    case AUD_FMT_S32:
629        AUD_log (NULL, "S32");
630        break;
631    case AUD_FMT_U32:
632        AUD_log (NULL, "U32");
633        break;
634    default:
635        AUD_log (NULL, "invalid(%d)", as->fmt);
636        break;
637    }
638
639    AUD_log (NULL, " endianness=");
640    switch (as->endianness) {
641    case 0:
642        AUD_log (NULL, "little");
643        break;
644    case 1:
645        AUD_log (NULL, "big");
646        break;
647    default:
648        AUD_log (NULL, "invalid");
649        break;
650    }
651    AUD_log (NULL, "\n");
652}
653
654static int audio_validate_settings (struct audsettings *as)
655{
656    int invalid;
657
658    invalid = as->nchannels != 1 && as->nchannels != 2;
659    invalid |= as->endianness != 0 && as->endianness != 1;
660
661    switch (as->fmt) {
662    case AUD_FMT_S8:
663    case AUD_FMT_U8:
664    case AUD_FMT_S16:
665    case AUD_FMT_U16:
666    case AUD_FMT_S32:
667    case AUD_FMT_U32:
668        break;
669    default:
670        invalid = 1;
671        break;
672    }
673
674    invalid |= as->freq <= 0;
675    return invalid ? -1 : 0;
676}
677
678static int audio_pcm_info_eq (struct audio_pcm_info *info, struct audsettings *as)
679{
680    int bits = 8, sign = 0;
681
682    switch (as->fmt) {
683    case AUD_FMT_S8:
684        sign = 1;
685    case AUD_FMT_U8:
686        break;
687
688    case AUD_FMT_S16:
689        sign = 1;
690    case AUD_FMT_U16:
691        bits = 16;
692        break;
693
694    case AUD_FMT_S32:
695        sign = 1;
696    case AUD_FMT_U32:
697        bits = 32;
698        break;
699    }
700    return info->freq == as->freq
701        && info->nchannels == as->nchannels
702        && info->sign == sign
703        && info->bits == bits
704        && info->swap_endianness == (as->endianness != AUDIO_HOST_ENDIANNESS);
705}
706
707void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as)
708{
709    int bits = 8, sign = 0, shift = 0;
710
711    switch (as->fmt) {
712    case AUD_FMT_S8:
713        sign = 1;
714    case AUD_FMT_U8:
715        break;
716
717    case AUD_FMT_S16:
718        sign = 1;
719    case AUD_FMT_U16:
720        bits = 16;
721        shift = 1;
722        break;
723
724    case AUD_FMT_S32:
725        sign = 1;
726    case AUD_FMT_U32:
727        bits = 32;
728        shift = 2;
729        break;
730    }
731
732    info->freq = as->freq;
733    info->bits = bits;
734    info->sign = sign;
735    info->nchannels = as->nchannels;
736    info->shift = (as->nchannels == 2) + shift;
737    info->align = (1 << info->shift) - 1;
738    info->bytes_per_second = info->freq << info->shift;
739    info->swap_endianness = (as->endianness != AUDIO_HOST_ENDIANNESS);
740}
741
742void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len)
743{
744    if (!len) {
745        return;
746    }
747
748    if (info->sign) {
749        memset (buf, 0x00, len << info->shift);
750    }
751    else {
752        switch (info->bits) {
753        case 8:
754            memset (buf, 0x80, len << info->shift);
755            break;
756
757        case 16:
758            {
759                int i;
760                uint16_t *p = buf;
761                int shift = info->nchannels - 1;
762                short s = INT16_MAX;
763
764                if (info->swap_endianness) {
765                    s = bswap16 (s);
766                }
767
768                for (i = 0; i < len << shift; i++) {
769                    p[i] = s;
770                }
771            }
772            break;
773
774        case 32:
775            {
776                int i;
777                uint32_t *p = buf;
778                int shift = info->nchannels - 1;
779                int32_t s = INT32_MAX;
780
781                if (info->swap_endianness) {
782                    s = bswap32 (s);
783                }
784
785                for (i = 0; i < len << shift; i++) {
786                    p[i] = s;
787                }
788            }
789            break;
790
791        default:
792            AUD_log (NULL, "audio_pcm_info_clear_buf: invalid bits %d\n",
793                     info->bits);
794            break;
795        }
796    }
797}
798
799/*
800 * Capture
801 */
802static void noop_conv (struct st_sample *dst, const void *src,
803                       int samples, struct mixeng_volume *vol)
804{
805    (void) src;
806    (void) dst;
807    (void) samples;
808    (void) vol;
809}
810
811static CaptureVoiceOut *audio_pcm_capture_find_specific (
812    struct audsettings *as
813    )
814{
815    CaptureVoiceOut *cap;
816    AudioState *s = &glob_audio_state;
817
818    for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
819        if (audio_pcm_info_eq (&cap->hw.info, as)) {
820            return cap;
821        }
822    }
823    return NULL;
824}
825
826static void audio_notify_capture (CaptureVoiceOut *cap, audcnotification_e cmd)
827{
828    struct capture_callback *cb;
829
830#ifdef DEBUG_CAPTURE
831    dolog ("notification %d sent\n", cmd);
832#endif
833    for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
834        cb->ops.notify (cb->opaque, cmd);
835    }
836}
837
838static void audio_capture_maybe_changed (CaptureVoiceOut *cap, int enabled)
839{
840    if (cap->hw.enabled != enabled) {
841        audcnotification_e cmd;
842        cap->hw.enabled = enabled;
843        cmd = enabled ? AUD_CNOTIFY_ENABLE : AUD_CNOTIFY_DISABLE;
844        audio_notify_capture (cap, cmd);
845    }
846}
847
848static void audio_recalc_and_notify_capture (CaptureVoiceOut *cap)
849{
850    HWVoiceOut *hw = &cap->hw;
851    SWVoiceOut *sw;
852    int enabled = 0;
853
854    for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
855        if (sw->active) {
856            enabled = 1;
857            break;
858        }
859    }
860    audio_capture_maybe_changed (cap, enabled);
861}
862
863static void audio_detach_capture (HWVoiceOut *hw)
864{
865    SWVoiceCap *sc = hw->cap_head.lh_first;
866
867    while (sc) {
868        SWVoiceCap *sc1 = sc->entries.le_next;
869        SWVoiceOut *sw = &sc->sw;
870        CaptureVoiceOut *cap = sc->cap;
871        int was_active = sw->active;
872
873        if (sw->rate) {
874            st_rate_stop (sw->rate);
875            sw->rate = NULL;
876        }
877
878        QLIST_REMOVE (sw, entries);
879        QLIST_REMOVE (sc, entries);
880        qemu_free (sc);
881        if (was_active) {
882            /* We have removed soft voice from the capture:
883               this might have changed the overall status of the capture
884               since this might have been the only active voice */
885            audio_recalc_and_notify_capture (cap);
886        }
887        sc = sc1;
888    }
889}
890
891static int audio_attach_capture (HWVoiceOut *hw)
892{
893    AudioState *s = &glob_audio_state;
894    CaptureVoiceOut *cap;
895
896    audio_detach_capture (hw);
897    for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
898        SWVoiceCap *sc;
899        SWVoiceOut *sw;
900        HWVoiceOut *hw_cap = &cap->hw;
901
902        sc = audio_calloc (AUDIO_FUNC, 1, sizeof (*sc));
903        if (!sc) {
904            dolog ("Could not allocate soft capture voice (%zu bytes)\n",
905                   sizeof (*sc));
906            return -1;
907        }
908
909        sc->cap = cap;
910        sw = &sc->sw;
911        sw->hw = hw_cap;
912        sw->info = hw->info;
913        sw->empty = 1;
914        sw->active = hw->enabled;
915        sw->conv = noop_conv;
916        sw->ratio = ((int64_t) hw_cap->info.freq << 32) / sw->info.freq;
917        sw->rate = st_rate_start (sw->info.freq, hw_cap->info.freq);
918        if (!sw->rate) {
919            dolog ("Could not start rate conversion for `%s'\n", SW_NAME (sw));
920            qemu_free (sw);
921            return -1;
922        }
923        QLIST_INSERT_HEAD (&hw_cap->sw_head, sw, entries);
924        QLIST_INSERT_HEAD (&hw->cap_head, sc, entries);
925#ifdef DEBUG_CAPTURE
926        asprintf (&sw->name, "for %p %d,%d,%d",
927                  hw, sw->info.freq, sw->info.bits, sw->info.nchannels);
928        dolog ("Added %s active = %d\n", sw->name, sw->active);
929#endif
930        if (sw->active) {
931            audio_capture_maybe_changed (cap, 1);
932        }
933    }
934    return 0;
935}
936
937/*
938 * Hard voice (capture)
939 */
940static int audio_pcm_hw_find_min_in (HWVoiceIn *hw)
941{
942    SWVoiceIn *sw;
943    int m = hw->total_samples_captured;
944
945    for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
946        if (sw->active) {
947            m = audio_MIN (m, sw->total_hw_samples_acquired);
948        }
949    }
950    return m;
951}
952
953int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
954{
955    int live = hw->total_samples_captured - audio_pcm_hw_find_min_in (hw);
956    if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
957        dolog ("live=%d hw->samples=%d\n", live, hw->samples);
958        return 0;
959    }
960    return live;
961}
962
963int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
964                           int live, int pending)
965{
966    int left = hw->samples - pending;
967    int len = audio_MIN (left, live);
968    int clipped = 0;
969
970    while (len) {
971        struct st_sample *src = hw->mix_buf + hw->rpos;
972        uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
973        int samples_till_end_of_buf = hw->samples - hw->rpos;
974        int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
975
976        hw->clip (dst, src, samples_to_clip);
977
978        hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
979        len -= samples_to_clip;
980        clipped += samples_to_clip;
981    }
982    return clipped;
983}
984
985/*
986 * Soft voice (capture)
987 */
988static int audio_pcm_sw_get_rpos_in (SWVoiceIn *sw)
989{
990    HWVoiceIn *hw = sw->hw;
991    int live = hw->total_samples_captured - sw->total_hw_samples_acquired;
992    int rpos;
993
994    if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
995        dolog ("live=%d hw->samples=%d\n", live, hw->samples);
996        return 0;
997    }
998
999    rpos = hw->wpos - live;
1000    if (rpos >= 0) {
1001        return rpos;
1002    }
1003    else {
1004        return hw->samples + rpos;
1005    }
1006}
1007
1008int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
1009{
1010    HWVoiceIn *hw = sw->hw;
1011    int samples, live, ret = 0, swlim, isamp, osamp, rpos, total = 0;
1012    struct st_sample *src, *dst = sw->buf;
1013
1014    rpos = audio_pcm_sw_get_rpos_in (sw) % hw->samples;
1015
1016    live = hw->total_samples_captured - sw->total_hw_samples_acquired;
1017    if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1018        dolog ("live_in=%d hw->samples=%d\n", live, hw->samples);
1019        return 0;
1020    }
1021
1022    samples = size >> sw->info.shift;
1023    if (!live) {
1024        return 0;
1025    }
1026
1027    swlim = (live * sw->ratio) >> 32;
1028    swlim = audio_MIN (swlim, samples);
1029
1030    while (swlim) {
1031        src = hw->conv_buf + rpos;
1032        isamp = hw->wpos - rpos;
1033        /* XXX: <= ? */
1034        if (isamp <= 0) {
1035            isamp = hw->samples - rpos;
1036        }
1037
1038        if (!isamp) {
1039            break;
1040        }
1041        osamp = swlim;
1042
1043        if (audio_bug (AUDIO_FUNC, osamp < 0)) {
1044            dolog ("osamp=%d\n", osamp);
1045            return 0;
1046        }
1047
1048        st_rate_flow (sw->rate, src, dst, &isamp, &osamp);
1049        swlim -= osamp;
1050        rpos = (rpos + isamp) % hw->samples;
1051        dst += osamp;
1052        ret += osamp;
1053        total += isamp;
1054    }
1055
1056    sw->clip (buf, sw->buf, ret);
1057    sw->total_hw_samples_acquired += total;
1058    return ret << sw->info.shift;
1059}
1060
1061/*
1062 * Hard voice (playback)
1063 */
1064static int audio_pcm_hw_find_min_out (HWVoiceOut *hw, int *nb_livep)
1065{
1066    SWVoiceOut *sw;
1067    int m = INT_MAX;
1068    int nb_live = 0;
1069
1070    for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1071        if (sw->active && !sw->empty) {
1072            m = audio_MIN (m, sw->total_hw_samples_mixed);
1073            nb_live += 1;
1074        }
1075    }
1076
1077    *nb_livep = nb_live;
1078    return m;
1079}
1080
1081static int audio_pcm_hw_get_live_out (HWVoiceOut *hw, int *nb_live)
1082{
1083    int smin;
1084    int nb_live1;
1085
1086    smin = audio_pcm_hw_find_min_out (hw, &nb_live1);
1087    if (nb_live) {
1088        *nb_live = nb_live1;
1089    }
1090
1091    if (nb_live1) {
1092        int live = smin;
1093
1094        if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1095            dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1096            return 0;
1097        }
1098        return live;
1099    }
1100    return 0;
1101}
1102
1103/*
1104 * Soft voice (playback)
1105 */
1106int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
1107{
1108    int hwsamples, samples, isamp, osamp, wpos, live, dead, left, swlim, blck;
1109    int ret = 0, pos = 0, total = 0;
1110
1111    if (!sw) {
1112        return size;
1113    }
1114
1115    hwsamples = sw->hw->samples;
1116
1117    live = sw->total_hw_samples_mixed;
1118    if (audio_bug (AUDIO_FUNC, live < 0 || live > hwsamples)){
1119        dolog ("live=%d hw->samples=%d\n", live, hwsamples);
1120        return 0;
1121    }
1122
1123    if (live == hwsamples) {
1124#ifdef DEBUG_OUT
1125        dolog ("%s is full %d\n", sw->name, live);
1126#endif
1127        return 0;
1128    }
1129
1130    wpos = (sw->hw->rpos + live) % hwsamples;
1131    samples = size >> sw->info.shift;
1132
1133    dead = hwsamples - live;
1134    swlim = ((int64_t) dead << 32) / sw->ratio;
1135    swlim = audio_MIN (swlim, samples);
1136    if (swlim) {
1137        sw->conv (sw->buf, buf, swlim, &sw->vol);
1138    }
1139
1140    while (swlim) {
1141        dead = hwsamples - live;
1142        left = hwsamples - wpos;
1143        blck = audio_MIN (dead, left);
1144        if (!blck) {
1145            break;
1146        }
1147        isamp = swlim;
1148        osamp = blck;
1149        st_rate_flow_mix (
1150            sw->rate,
1151            sw->buf + pos,
1152            sw->hw->mix_buf + wpos,
1153            &isamp,
1154            &osamp
1155            );
1156        ret += isamp;
1157        swlim -= isamp;
1158        pos += isamp;
1159        live += osamp;
1160        wpos = (wpos + osamp) % hwsamples;
1161        total += osamp;
1162    }
1163
1164    sw->total_hw_samples_mixed += total;
1165    sw->empty = sw->total_hw_samples_mixed == 0;
1166
1167#ifdef DEBUG_OUT
1168    dolog (
1169        "%s: write size %d ret %d total sw %d\n",
1170        SW_NAME (sw),
1171        size >> sw->info.shift,
1172        ret,
1173        sw->total_hw_samples_mixed
1174        );
1175#endif
1176
1177    return ret << sw->info.shift;
1178}
1179
1180#ifdef DEBUG_AUDIO
1181static void audio_pcm_print_info (const char *cap, struct audio_pcm_info *info)
1182{
1183    dolog ("%s: bits %d, sign %d, freq %d, nchan %d\n",
1184           cap, info->bits, info->sign, info->freq, info->nchannels);
1185}
1186#endif
1187
1188#define DAC
1189#include "audio_template.h"
1190#undef DAC
1191#include "audio_template.h"
1192
1193/*
1194 * Timer
1195 */
1196static void audio_timer (void *opaque)
1197{
1198    AudioState *s = opaque;
1199#if 0
1200#define  MAX_DIFFS  100
1201    int64_t         now  = qemu_get_clock_ms(vm_clock);
1202    static int64_t  last = 0;
1203    static float    diffs[MAX_DIFFS];
1204    static int      num_diffs;
1205
1206    if (last == 0)
1207        last = now;
1208    else {
1209        diffs[num_diffs] = (float)((now-last)/1e6);  /* last diff in ms */
1210        if (++num_diffs == MAX_DIFFS) {
1211            double  min_diff = 1e6, max_diff = -1e6;
1212            double  all_diff = 0.;
1213            int     nn;
1214
1215            for (nn = 0; nn < num_diffs; nn++) {
1216                if (diffs[nn] < min_diff) min_diff = diffs[nn];
1217                if (diffs[nn] > max_diff) max_diff = diffs[nn];
1218                all_diff += diffs[nn];
1219            }
1220            all_diff *= 1.0/num_diffs;
1221            printf("audio timer: min_diff=%6.2g max_diff=%6.2g avg_diff=%6.2g samples=%d\n",
1222                            min_diff, max_diff, all_diff, num_diffs);
1223            num_diffs = 0;
1224        }
1225    }
1226    last = now;
1227#endif
1228
1229    audio_run ("timer");
1230    qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + conf.period.ticks);
1231}
1232
1233
1234static int audio_is_timer_needed (void)
1235{
1236    HWVoiceIn *hwi = NULL;
1237    HWVoiceOut *hwo = NULL;
1238
1239    while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1240        if (!hwo->poll_mode) return 1;
1241    }
1242    while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1243        if (!hwi->poll_mode) return 1;
1244    }
1245    return 0;
1246}
1247
1248static void audio_reset_timer (void)
1249{
1250    AudioState *s = &glob_audio_state;
1251
1252    if (audio_is_timer_needed ()) {
1253        qemu_mod_timer (s->ts, qemu_get_clock_ns (vm_clock) + 1);
1254    }
1255    else {
1256        qemu_del_timer (s->ts);
1257    }
1258}
1259
1260/*
1261 * Public API
1262 */
1263int AUD_write (SWVoiceOut *sw, void *buf, int size)
1264{
1265    int bytes;
1266
1267    if (!sw) {
1268        /* XXX: Consider options */
1269        return size;
1270    }
1271
1272    if (!sw->hw->enabled) {
1273        dolog ("Writing to disabled voice %s\n", SW_NAME (sw));
1274        return 0;
1275    }
1276
1277    bytes = sw->hw->pcm_ops->write (sw, buf, size);
1278    return bytes;
1279}
1280
1281int AUD_read (SWVoiceIn *sw, void *buf, int size)
1282{
1283    int bytes;
1284
1285    if (!sw) {
1286        /* XXX: Consider options */
1287        return size;
1288    }
1289
1290    if (!sw->hw->enabled) {
1291        dolog ("Reading from disabled voice %s\n", SW_NAME (sw));
1292        return 0;
1293    }
1294
1295    bytes = sw->hw->pcm_ops->read (sw, buf, size);
1296    return bytes;
1297}
1298
1299int AUD_get_buffer_size_out (SWVoiceOut *sw)
1300{
1301    return sw->hw->samples << sw->hw->info.shift;
1302}
1303
1304void AUD_set_active_out (SWVoiceOut *sw, int on)
1305{
1306    HWVoiceOut *hw;
1307
1308    if (!sw) {
1309        return;
1310    }
1311
1312    hw = sw->hw;
1313    if (sw->active != on) {
1314        AudioState *s = &glob_audio_state;
1315        SWVoiceOut *temp_sw;
1316        SWVoiceCap *sc;
1317
1318        if (on) {
1319            hw->pending_disable = 0;
1320            if (!hw->enabled) {
1321                hw->enabled = 1;
1322                if (s->vm_running) {
1323                    hw->pcm_ops->ctl_out (hw, VOICE_ENABLE, conf.try_poll_out);
1324                    audio_reset_timer ();
1325                }
1326            }
1327        }
1328        else {
1329            if (hw->enabled) {
1330                int nb_active = 0;
1331
1332                for (temp_sw = hw->sw_head.lh_first; temp_sw;
1333                     temp_sw = temp_sw->entries.le_next) {
1334                    nb_active += temp_sw->active != 0;
1335                }
1336
1337                hw->pending_disable = nb_active == 1;
1338            }
1339        }
1340
1341        for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1342            sc->sw.active = hw->enabled;
1343            if (hw->enabled) {
1344                audio_capture_maybe_changed (sc->cap, 1);
1345            }
1346        }
1347        sw->active = on;
1348    }
1349}
1350
1351void AUD_set_active_in (SWVoiceIn *sw, int on)
1352{
1353    HWVoiceIn *hw;
1354
1355    if (!sw) {
1356        return;
1357    }
1358
1359    hw = sw->hw;
1360    if (sw->active != on) {
1361        AudioState *s = &glob_audio_state;
1362        SWVoiceIn *temp_sw;
1363
1364        if (on) {
1365            if (!hw->enabled) {
1366                hw->enabled = 1;
1367                if (s->vm_running) {
1368                    hw->pcm_ops->ctl_in (hw, VOICE_ENABLE, conf.try_poll_in);
1369                }
1370            }
1371            sw->total_hw_samples_acquired = hw->total_samples_captured;
1372        }
1373        else {
1374            if (hw->enabled) {
1375                int nb_active = 0;
1376
1377                for (temp_sw = hw->sw_head.lh_first; temp_sw;
1378                     temp_sw = temp_sw->entries.le_next) {
1379                    nb_active += temp_sw->active != 0;
1380                }
1381
1382                if (nb_active == 1) {
1383                    hw->enabled = 0;
1384                    hw->pcm_ops->ctl_in (hw, VOICE_DISABLE);
1385                }
1386            }
1387        }
1388        sw->active = on;
1389    }
1390}
1391
1392static int audio_get_avail (SWVoiceIn *sw)
1393{
1394    int live;
1395
1396    if (!sw) {
1397        return 0;
1398    }
1399
1400    live = sw->hw->total_samples_captured - sw->total_hw_samples_acquired;
1401    if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1402        dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1403        return 0;
1404    }
1405
1406    ldebug (
1407        "%s: get_avail live %d ret %" PRId64 "\n",
1408        SW_NAME (sw),
1409        live, (((int64_t) live << 32) / sw->ratio) << sw->info.shift
1410        );
1411
1412    return (((int64_t) live << 32) / sw->ratio) << sw->info.shift;
1413}
1414
1415static int audio_get_free (SWVoiceOut *sw)
1416{
1417    int live, dead;
1418
1419    if (!sw) {
1420        return 0;
1421    }
1422
1423    live = sw->total_hw_samples_mixed;
1424
1425    if (audio_bug (AUDIO_FUNC, live < 0 || live > sw->hw->samples)) {
1426        dolog ("live=%d sw->hw->samples=%d\n", live, sw->hw->samples);
1427        return 0;
1428    }
1429
1430    dead = sw->hw->samples - live;
1431
1432#ifdef DEBUG_OUT
1433    dolog ("%s: get_free live %d dead %d ret %" PRId64 "\n",
1434           SW_NAME (sw),
1435           live, dead, (((int64_t) dead << 32) / sw->ratio) << sw->info.shift);
1436#endif
1437
1438    return (((int64_t) dead << 32) / sw->ratio) << sw->info.shift;
1439}
1440
1441static void audio_capture_mix_and_clear (HWVoiceOut *hw, int rpos, int samples)
1442{
1443    int n;
1444
1445    if (hw->enabled) {
1446        SWVoiceCap *sc;
1447
1448        for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1449            SWVoiceOut *sw = &sc->sw;
1450            int rpos2 = rpos;
1451
1452            n = samples;
1453            while (n) {
1454                int till_end_of_hw = hw->samples - rpos2;
1455                int to_write = audio_MIN (till_end_of_hw, n);
1456                int bytes = to_write << hw->info.shift;
1457                int written;
1458
1459                sw->buf = hw->mix_buf + rpos2;
1460                written = audio_pcm_sw_write (sw, NULL, bytes);
1461                if (written - bytes) {
1462                    dolog ("Could not mix %d bytes into a capture "
1463                           "buffer, mixed %d\n",
1464                           bytes, written);
1465                    break;
1466                }
1467                n -= to_write;
1468                rpos2 = (rpos2 + to_write) % hw->samples;
1469            }
1470        }
1471    }
1472
1473    n = audio_MIN (samples, hw->samples - rpos);
1474    mixeng_clear (hw->mix_buf + rpos, n);
1475    mixeng_clear (hw->mix_buf, samples - n);
1476}
1477
1478static void audio_run_out (AudioState *s)
1479{
1480    HWVoiceOut *hw = NULL;
1481    SWVoiceOut *sw;
1482
1483    while ((hw = audio_pcm_hw_find_any_enabled_out (hw))) {
1484        int played;
1485        int live, free, nb_live, cleanup_required, prev_rpos;
1486
1487        live = audio_pcm_hw_get_live_out (hw, &nb_live);
1488        if (!nb_live) {
1489            live = 0;
1490        }
1491
1492        if (audio_bug (AUDIO_FUNC, live < 0 || live > hw->samples)) {
1493            dolog ("live=%d hw->samples=%d\n", live, hw->samples);
1494            continue;
1495        }
1496
1497        if (hw->pending_disable && !nb_live) {
1498            SWVoiceCap *sc;
1499#ifdef DEBUG_OUT
1500            dolog ("Disabling voice\n");
1501#endif
1502            hw->enabled = 0;
1503            hw->pending_disable = 0;
1504            hw->pcm_ops->ctl_out (hw, VOICE_DISABLE);
1505            for (sc = hw->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1506                sc->sw.active = 0;
1507                audio_recalc_and_notify_capture (sc->cap);
1508            }
1509            continue;
1510        }
1511
1512        if (!live) {
1513            for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1514                if (sw->active) {
1515                    free = audio_get_free (sw);
1516                    if (free > 0) {
1517                        sw->callback.fn (sw->callback.opaque, free);
1518                    }
1519                }
1520            }
1521            continue;
1522        }
1523
1524        prev_rpos = hw->rpos;
1525        played = hw->pcm_ops->run_out (hw, live);
1526        if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
1527            dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
1528                   hw->rpos, hw->samples, played);
1529            hw->rpos = 0;
1530        }
1531
1532#ifdef DEBUG_OUT
1533        dolog ("played=%d\n", played);
1534#endif
1535
1536        if (played) {
1537            hw->ts_helper += played;
1538            audio_capture_mix_and_clear (hw, prev_rpos, played);
1539        }
1540
1541        cleanup_required = 0;
1542        for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1543            if (!sw->active || sw->empty) {
1544                continue;
1545            }
1546
1547            if (audio_bug (AUDIO_FUNC, played > sw->total_hw_samples_mixed)) {
1548                dolog ("played=%d sw->total_hw_samples_mixed=%d\n",
1549                       played, sw->total_hw_samples_mixed);
1550                played = sw->total_hw_samples_mixed;
1551            }
1552
1553            sw->total_hw_samples_mixed -= played;
1554
1555            if (!sw->total_hw_samples_mixed) {
1556                sw->empty = 1;
1557                cleanup_required |= !sw->active && !sw->callback.fn;
1558            }
1559
1560            if (sw->active) {
1561                free = audio_get_free (sw);
1562                if (free > 0) {
1563                    sw->callback.fn (sw->callback.opaque, free);
1564                }
1565            }
1566        }
1567
1568        if (cleanup_required) {
1569            SWVoiceOut *sw1;
1570
1571            sw = hw->sw_head.lh_first;
1572            while (sw) {
1573                sw1 = sw->entries.le_next;
1574                if (!sw->active && !sw->callback.fn) {
1575#ifdef DEBUG_PLIVE
1576                    dolog ("Finishing with old voice\n");
1577#endif
1578                    audio_close_out (sw);
1579                }
1580                sw = sw1;
1581            }
1582        }
1583    }
1584}
1585
1586static void audio_run_in (AudioState *s)
1587{
1588    HWVoiceIn *hw = NULL;
1589
1590    while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
1591        SWVoiceIn *sw;
1592        int captured, min;
1593
1594        captured = hw->pcm_ops->run_in (hw);
1595
1596        min = audio_pcm_hw_find_min_in (hw);
1597        hw->total_samples_captured += captured - min;
1598        hw->ts_helper += captured;
1599
1600        for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1601            sw->total_hw_samples_acquired -= min;
1602
1603            if (sw->active) {
1604                int avail;
1605
1606                avail = audio_get_avail (sw);
1607                if (avail > 0) {
1608                    sw->callback.fn (sw->callback.opaque, avail);
1609                }
1610            }
1611        }
1612    }
1613}
1614
1615static void audio_run_capture (AudioState *s)
1616{
1617    CaptureVoiceOut *cap;
1618
1619    for (cap = s->cap_head.lh_first; cap; cap = cap->entries.le_next) {
1620        int live, rpos, captured;
1621        HWVoiceOut *hw = &cap->hw;
1622        SWVoiceOut *sw;
1623
1624        captured = live = audio_pcm_hw_get_live_out (hw, NULL);
1625        rpos = hw->rpos;
1626        while (live) {
1627            int left = hw->samples - rpos;
1628            int to_capture = audio_MIN (live, left);
1629            struct st_sample *src;
1630            struct capture_callback *cb;
1631
1632            src = hw->mix_buf + rpos;
1633            hw->clip (cap->buf, src, to_capture);
1634            mixeng_clear (src, to_capture);
1635
1636            for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1637                cb->ops.capture (cb->opaque, cap->buf,
1638                                 to_capture << hw->info.shift);
1639            }
1640            rpos = (rpos + to_capture) % hw->samples;
1641            live -= to_capture;
1642        }
1643        hw->rpos = rpos;
1644
1645        for (sw = hw->sw_head.lh_first; sw; sw = sw->entries.le_next) {
1646            if (!sw->active && sw->empty) {
1647                continue;
1648            }
1649
1650            if (audio_bug (AUDIO_FUNC, captured > sw->total_hw_samples_mixed)) {
1651                dolog ("captured=%d sw->total_hw_samples_mixed=%d\n",
1652                       captured, sw->total_hw_samples_mixed);
1653                captured = sw->total_hw_samples_mixed;
1654            }
1655
1656            sw->total_hw_samples_mixed -= captured;
1657            sw->empty = sw->total_hw_samples_mixed == 0;
1658        }
1659    }
1660}
1661
1662void audio_run (const char *msg)
1663{
1664    AudioState *s = &glob_audio_state;
1665
1666    audio_run_out (s);
1667    audio_run_in (s);
1668    audio_run_capture (s);
1669#ifdef DEBUG_POLL
1670    {
1671        static double prevtime;
1672        double currtime;
1673        struct timeval tv;
1674
1675        if (gettimeofday (&tv, NULL)) {
1676            perror ("audio_run: gettimeofday");
1677            return;
1678        }
1679
1680        currtime = tv.tv_sec + tv.tv_usec * 1e-6;
1681        dolog ("Elapsed since last %s: %f\n", msg, currtime - prevtime);
1682        prevtime = currtime;
1683    }
1684#endif
1685}
1686
1687static struct audio_option audio_options[] = {
1688    /* DAC */
1689    {
1690        .name  = "DAC_FIXED_SETTINGS",
1691        .tag   = AUD_OPT_BOOL,
1692        .valp  = &conf.fixed_out.enabled,
1693        .descr = "Use fixed settings for host DAC"
1694    },
1695    {
1696        .name  = "DAC_FIXED_FREQ",
1697        .tag   = AUD_OPT_INT,
1698        .valp  = &conf.fixed_out.settings.freq,
1699        .descr = "Frequency for fixed host DAC"
1700    },
1701    {
1702        .name  = "DAC_FIXED_FMT",
1703        .tag   = AUD_OPT_FMT,
1704        .valp  = &conf.fixed_out.settings.fmt,
1705        .descr = "Format for fixed host DAC"
1706    },
1707    {
1708        .name  = "DAC_FIXED_CHANNELS",
1709        .tag   = AUD_OPT_INT,
1710        .valp  = &conf.fixed_out.settings.nchannels,
1711        .descr = "Number of channels for fixed DAC (1 - mono, 2 - stereo)"
1712    },
1713    {
1714        .name  = "DAC_VOICES",
1715        .tag   = AUD_OPT_INT,
1716        .valp  = &conf.fixed_out.nb_voices,
1717        .descr = "Number of voices for DAC"
1718    },
1719    {
1720        .name  = "DAC_TRY_POLL",
1721        .tag   = AUD_OPT_BOOL,
1722        .valp  = &conf.try_poll_out,
1723        .descr = "Attempt using poll mode for DAC"
1724    },
1725    /* ADC */
1726    {
1727        .name  = "ADC_FIXED_SETTINGS",
1728        .tag   = AUD_OPT_BOOL,
1729        .valp  = &conf.fixed_in.enabled,
1730        .descr = "Use fixed settings for host ADC"
1731    },
1732    {
1733        .name  = "ADC_FIXED_FREQ",
1734        .tag   = AUD_OPT_INT,
1735        .valp  = &conf.fixed_in.settings.freq,
1736        .descr = "Frequency for fixed host ADC"
1737    },
1738    {
1739        .name  = "ADC_FIXED_FMT",
1740        .tag   = AUD_OPT_FMT,
1741        .valp  = &conf.fixed_in.settings.fmt,
1742        .descr = "Format for fixed host ADC"
1743    },
1744    {
1745        .name  = "ADC_FIXED_CHANNELS",
1746        .tag   = AUD_OPT_INT,
1747        .valp  = &conf.fixed_in.settings.nchannels,
1748        .descr = "Number of channels for fixed ADC (1 - mono, 2 - stereo)"
1749    },
1750    {
1751        .name  = "ADC_VOICES",
1752        .tag   = AUD_OPT_INT,
1753        .valp  = &conf.fixed_in.nb_voices,
1754        .descr = "Number of voices for ADC"
1755    },
1756    {
1757        .name  = "ADC_TRY_POLL",
1758        .tag   = AUD_OPT_BOOL,
1759        .valp  = &conf.try_poll_in,
1760        .descr = "Attempt using poll mode for ADC"
1761    },
1762    /* Misc */
1763    {
1764        .name  = "TIMER_PERIOD",
1765        .tag   = AUD_OPT_INT,
1766        .valp  = &conf.period.hertz,
1767        .descr = "Timer period in HZ (0 - use lowest possible)"
1768    },
1769    {
1770        .name  = "PLIVE",
1771        .tag   = AUD_OPT_BOOL,
1772        .valp  = &conf.plive,
1773        .descr = "(undocumented)"
1774    },
1775    {
1776        .name  = "LOG_TO_MONITOR",
1777        .tag   = AUD_OPT_BOOL,
1778        .valp  = &conf.log_to_monitor,
1779        .descr = "Print logging messages to monitor instead of stderr"
1780    },
1781    { /* End of list */ }
1782};
1783
1784static void audio_pp_nb_voices (const char *typ, int nb)
1785{
1786    switch (nb) {
1787    case 0:
1788        printf ("Does not support %s\n", typ);
1789        break;
1790    case 1:
1791        printf ("One %s voice\n", typ);
1792        break;
1793    case INT_MAX:
1794        printf ("Theoretically supports many %s voices\n", typ);
1795        break;
1796    default:
1797        printf ("Theoretically supports upto %d %s voices\n", nb, typ);
1798        break;
1799    }
1800
1801}
1802
1803void AUD_help (void)
1804{
1805    size_t i;
1806
1807    audio_process_options ("AUDIO", audio_options);
1808    for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1809        struct audio_driver *d = drvtab[i];
1810        if (d->options) {
1811            audio_process_options (d->name, d->options);
1812        }
1813    }
1814
1815    printf ("Audio options:\n");
1816    audio_print_options ("AUDIO", audio_options);
1817    printf ("\n");
1818
1819    printf ("Available drivers:\n");
1820
1821    for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1822        struct audio_driver *d = drvtab[i];
1823
1824        printf ("Name: %s\n", d->name);
1825        printf ("Description: %s\n", d->descr);
1826
1827        audio_pp_nb_voices ("playback", d->max_voices_out);
1828        audio_pp_nb_voices ("capture", d->max_voices_in);
1829
1830        if (d->options) {
1831            printf ("Options:\n");
1832            audio_print_options (d->name, d->options);
1833        }
1834        else {
1835            printf ("No options\n");
1836        }
1837        printf ("\n");
1838    }
1839
1840    printf (
1841        "Options are settable through environment variables.\n"
1842        "Example:\n"
1843#ifdef _WIN32
1844        "  set QEMU_AUDIO_DRV=wav\n"
1845        "  set QEMU_WAV_PATH=c:\\tune.wav\n"
1846#else
1847        "  export QEMU_AUDIO_DRV=wav\n"
1848        "  export QEMU_WAV_PATH=$HOME/tune.wav\n"
1849        "(for csh replace export with setenv in the above)\n"
1850#endif
1851        "  qemu ...\n\n"
1852        );
1853}
1854
1855static int audio_driver_init (AudioState *s, struct audio_driver *drv)
1856{
1857    if (drv->options) {
1858        audio_process_options (drv->name, drv->options);
1859    }
1860    s->drv_opaque = drv->init ();
1861
1862    if (s->drv_opaque) {
1863        audio_init_nb_voices_out (drv);
1864        audio_init_nb_voices_in (drv);
1865        s->drv = drv;
1866        return 0;
1867    }
1868    else {
1869        dolog ("Could not init `%s' audio driver\n", drv->name);
1870        return -1;
1871    }
1872}
1873
1874static void audio_vm_change_state_handler (void *opaque, int running,
1875                                           int reason)
1876{
1877    AudioState *s = opaque;
1878    HWVoiceOut *hwo = NULL;
1879    HWVoiceIn *hwi = NULL;
1880    int op = running ? VOICE_ENABLE : VOICE_DISABLE;
1881
1882    s->vm_running = running;
1883    while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1884        hwo->pcm_ops->ctl_out (hwo, op, conf.try_poll_out);
1885    }
1886
1887    while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1888        hwi->pcm_ops->ctl_in (hwi, op, conf.try_poll_in);
1889    }
1890    audio_reset_timer ();
1891}
1892
1893static int initialized;
1894
1895static void audio_atexit (void)
1896{
1897    AudioState *s = &glob_audio_state;
1898    HWVoiceOut *hwo = NULL;
1899    HWVoiceIn *hwi = NULL;
1900
1901    if (!initialized) return;
1902    initialized = 0;
1903
1904    while ((hwo = audio_pcm_hw_find_any_enabled_out (hwo))) {
1905        SWVoiceCap *sc;
1906
1907        hwo->pcm_ops->ctl_out (hwo, VOICE_DISABLE);
1908        hwo->pcm_ops->fini_out (hwo);
1909
1910        for (sc = hwo->cap_head.lh_first; sc; sc = sc->entries.le_next) {
1911            CaptureVoiceOut *cap = sc->cap;
1912            struct capture_callback *cb;
1913
1914            for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
1915                cb->ops.destroy (cb->opaque);
1916            }
1917        }
1918    }
1919
1920    while ((hwi = audio_pcm_hw_find_any_enabled_in (hwi))) {
1921        hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
1922        hwi->pcm_ops->fini_in (hwi);
1923    }
1924
1925    if (s->drv) {
1926        s->drv->fini (s->drv_opaque);
1927    }
1928}
1929
1930static void audio_save (QEMUFile *f, void *opaque)
1931{
1932    (void) f;
1933    (void) opaque;
1934}
1935
1936static int audio_load (QEMUFile *f, void *opaque, int version_id)
1937{
1938    (void) f;
1939    (void) opaque;
1940
1941    if (version_id != 1) {
1942        return -EINVAL;
1943    }
1944
1945    return 0;
1946}
1947
1948
1949
1950static void audio_init (void)
1951{
1952    size_t i;
1953    int done = 0;
1954    const char *drvname;
1955    VMChangeStateEntry *e;
1956    AudioState *s = &glob_audio_state;
1957
1958    if (s->drv) {
1959        return;
1960    }
1961
1962    QLIST_INIT (&s->hw_head_out);
1963    QLIST_INIT (&s->hw_head_in);
1964    QLIST_INIT (&s->cap_head);
1965    atexit (audio_atexit);
1966
1967    s->ts = qemu_new_timer_ns (vm_clock, audio_timer, s);
1968    if (!s->ts) {
1969        dolog ("Could not create audio timer\n");
1970        return;
1971    }
1972
1973    audio_process_options ("AUDIO", audio_options);
1974
1975    s->nb_hw_voices_out = conf.fixed_out.nb_voices;
1976    s->nb_hw_voices_in = conf.fixed_in.nb_voices;
1977
1978    if (s->nb_hw_voices_out <= 0) {
1979        dolog ("Bogus number of playback voices %d, setting to 1\n",
1980               s->nb_hw_voices_out);
1981        s->nb_hw_voices_out = 1;
1982    }
1983
1984    if (s->nb_hw_voices_in <= 0) {
1985        dolog ("Bogus number of capture voices %d, setting to 0\n",
1986               s->nb_hw_voices_in);
1987        s->nb_hw_voices_in = 0;
1988    }
1989
1990    {
1991        int def;
1992        drvname = audio_get_conf_str ("QEMU_AUDIO_DRV", NULL, &def);
1993    }
1994
1995    if (drvname) {
1996        int found = 0;
1997
1998        for (i = 0; i < ARRAY_SIZE (drvtab); i++) {
1999            if (!strcmp (drvname, drvtab[i]->name)) {
2000                done = !audio_driver_init (s, drvtab[i]);
2001                found = 1;
2002                break;
2003            }
2004        }
2005
2006        if (!found) {
2007            dolog ("Unknown audio driver `%s'\n", drvname);
2008            dolog ("Run with -audio-help to list available drivers\n");
2009        }
2010    }
2011
2012    if (!done) {
2013        for (i = 0; !done && i < ARRAY_SIZE (drvtab); i++) {
2014            if (drvtab[i]->can_be_default) {
2015                done = !audio_driver_init (s, drvtab[i]);
2016            }
2017        }
2018    }
2019
2020    if (!done) {
2021        done = !audio_driver_init (s, &no_audio_driver);
2022        if (!done) {
2023            hw_error("Could not initialize audio subsystem\n");
2024        }
2025        else {
2026            dolog ("warning: Using timer based audio emulation\n");
2027        }
2028    }
2029
2030    if (conf.period.hertz <= 0) {
2031        if (conf.period.hertz < 0) {
2032            dolog ("warning: Timer period is negative - %d "
2033                   "treating as zero\n",
2034                   conf.period.hertz);
2035        }
2036        conf.period.ticks = 1;
2037    } else {
2038        conf.period.ticks =
2039            muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
2040    }
2041
2042    e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
2043    if (!e) {
2044        dolog ("warning: Could not register change state handler\n"
2045               "(Audio can continue looping even after stopping the VM)\n");
2046    }
2047    initialized = 1;
2048
2049    QLIST_INIT (&s->card_head);
2050    register_savevm ("audio", 0, 1, audio_save, audio_load, s);
2051    audio_reset_timer();
2052}
2053
2054void AUD_register_card (const char *name, QEMUSoundCard *card)
2055{
2056    audio_init ();
2057    card->name = qemu_strdup (name);
2058    memset (&card->entries, 0, sizeof (card->entries));
2059    QLIST_INSERT_HEAD (&glob_audio_state.card_head, card, entries);
2060}
2061
2062void AUD_remove_card (QEMUSoundCard *card)
2063{
2064    QLIST_REMOVE (card, entries);
2065    qemu_free (card->name);
2066}
2067
2068
2069CaptureVoiceOut *AUD_add_capture (
2070    struct audsettings *as,
2071    struct audio_capture_ops *ops,
2072    void *cb_opaque
2073    )
2074{
2075    AudioState *s = &glob_audio_state;
2076    CaptureVoiceOut *cap;
2077    struct capture_callback *cb;
2078
2079    if (audio_validate_settings (as)) {
2080        dolog ("Invalid settings were passed when trying to add capture\n");
2081        audio_print_settings (as);
2082        goto err0;
2083    }
2084
2085    cb = audio_calloc (AUDIO_FUNC, 1, sizeof (*cb));
2086    if (!cb) {
2087        dolog ("Could not allocate capture callback information, size %zu\n",
2088               sizeof (*cb));
2089        goto err0;
2090    }
2091    cb->ops = *ops;
2092    cb->opaque = cb_opaque;
2093
2094    cap = audio_pcm_capture_find_specific (as);
2095    if (cap) {
2096        QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2097        return cap;
2098    }
2099    else {
2100        HWVoiceOut *hw;
2101        CaptureVoiceOut *cap;
2102
2103        cap = audio_calloc (AUDIO_FUNC, 1, sizeof (*cap));
2104        if (!cap) {
2105            dolog ("Could not allocate capture voice, size %zu\n",
2106                   sizeof (*cap));
2107            goto err1;
2108        }
2109
2110        hw = &cap->hw;
2111        QLIST_INIT (&hw->sw_head);
2112        QLIST_INIT (&cap->cb_head);
2113
2114        /* XXX find a more elegant way */
2115        hw->samples = 4096 * 4;
2116        hw->mix_buf = audio_calloc (AUDIO_FUNC, hw->samples,
2117                                    sizeof (struct st_sample));
2118        if (!hw->mix_buf) {
2119            dolog ("Could not allocate capture mix buffer (%d samples)\n",
2120                   hw->samples);
2121            goto err2;
2122        }
2123
2124        audio_pcm_init_info (&hw->info, as);
2125
2126        cap->buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
2127        if (!cap->buf) {
2128            dolog ("Could not allocate capture buffer "
2129                   "(%d samples, each %d bytes)\n",
2130                   hw->samples, 1 << hw->info.shift);
2131            goto err3;
2132        }
2133
2134        hw->clip = mixeng_clip
2135            [hw->info.nchannels == 2]
2136            [hw->info.sign]
2137            [hw->info.swap_endianness]
2138            [audio_bits_to_index (hw->info.bits)];
2139
2140        QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
2141        QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);
2142
2143        hw = NULL;
2144        while ((hw = audio_pcm_hw_find_any_out (hw))) {
2145            audio_attach_capture (hw);
2146        }
2147        return cap;
2148
2149    err3:
2150        qemu_free (cap->hw.mix_buf);
2151    err2:
2152        qemu_free (cap);
2153    err1:
2154        qemu_free (cb);
2155    err0:
2156        return NULL;
2157    }
2158}
2159
2160void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
2161{
2162    struct capture_callback *cb;
2163
2164    for (cb = cap->cb_head.lh_first; cb; cb = cb->entries.le_next) {
2165        if (cb->opaque == cb_opaque) {
2166            cb->ops.destroy (cb_opaque);
2167            QLIST_REMOVE (cb, entries);
2168            qemu_free (cb);
2169
2170            if (!cap->cb_head.lh_first) {
2171                SWVoiceOut *sw = cap->hw.sw_head.lh_first, *sw1;
2172
2173                while (sw) {
2174                    SWVoiceCap *sc = (SWVoiceCap *) sw;
2175#ifdef DEBUG_CAPTURE
2176                    dolog ("freeing %s\n", sw->name);
2177#endif
2178
2179                    sw1 = sw->entries.le_next;
2180                    if (sw->rate) {
2181                        st_rate_stop (sw->rate);
2182                        sw->rate = NULL;
2183                    }
2184                    QLIST_REMOVE (sw, entries);
2185                    QLIST_REMOVE (sc, entries);
2186                    qemu_free (sc);
2187                    sw = sw1;
2188                }
2189                QLIST_REMOVE (cap, entries);
2190                qemu_free (cap);
2191            }
2192            return;
2193        }
2194    }
2195}
2196
2197void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
2198{
2199    if (sw) {
2200        sw->vol.mute = mute;
2201        sw->vol.l = nominal_volume.l * lvol / 255;
2202        sw->vol.r = nominal_volume.r * rvol / 255;
2203    }
2204}
2205
2206void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
2207{
2208    if (sw) {
2209        sw->vol.mute = mute;
2210        sw->vol.l = nominal_volume.l * lvol / 255;
2211        sw->vol.r = nominal_volume.r * rvol / 255;
2212    }
2213}
2214