1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
|
/* $OpenBSD: sio_sun.c,v 1.14 2015/02/16 06:04:06 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/audioio.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "debug.h"
#include "sio_priv.h"
struct sio_sun_hdl {
struct sio_hdl sio;
int fd;
int filling;
unsigned int ibpf, obpf; /* bytes per frame */
unsigned int ibytes, obytes; /* bytes the hw transferred */
unsigned int ierr, oerr; /* frames the hw dropped */
int idelta, odelta; /* position reported to client */
};
static void sio_sun_close(struct sio_hdl *);
static int sio_sun_start(struct sio_hdl *);
static int sio_sun_stop(struct sio_hdl *);
static int sio_sun_setpar(struct sio_hdl *, struct sio_par *);
static int sio_sun_getpar(struct sio_hdl *, struct sio_par *);
static int sio_sun_getcap(struct sio_hdl *, struct sio_cap *);
static size_t sio_sun_read(struct sio_hdl *, void *, size_t);
static size_t sio_sun_write(struct sio_hdl *, const void *, size_t);
static int sio_sun_nfds(struct sio_hdl *);
static int sio_sun_pollfd(struct sio_hdl *, struct pollfd *, int);
static int sio_sun_revents(struct sio_hdl *, struct pollfd *);
static struct sio_ops sio_sun_ops = {
sio_sun_close,
sio_sun_setpar,
sio_sun_getpar,
sio_sun_getcap,
sio_sun_write,
sio_sun_read,
sio_sun_start,
sio_sun_stop,
sio_sun_nfds,
sio_sun_pollfd,
sio_sun_revents,
NULL, /* setvol */
NULL, /* getvol */
};
/*
* convert sun encoding to sio_par encoding
*/
static int
sio_sun_infotoenc(struct sio_sun_hdl *hdl, struct audio_prinfo *ai,
struct sio_par *par)
{
par->msb = ai->msb;
par->bits = ai->precision;
par->bps = ai->bps;
switch (ai->encoding) {
case AUDIO_ENCODING_SLINEAR_LE:
par->le = 1;
par->sig = 1;
break;
case AUDIO_ENCODING_SLINEAR_BE:
par->le = 0;
par->sig = 1;
break;
case AUDIO_ENCODING_ULINEAR_LE:
par->le = 1;
par->sig = 0;
break;
case AUDIO_ENCODING_ULINEAR_BE:
par->le = 0;
par->sig = 0;
break;
case AUDIO_ENCODING_SLINEAR:
par->le = SIO_LE_NATIVE;
par->sig = 1;
break;
case AUDIO_ENCODING_ULINEAR:
par->le = SIO_LE_NATIVE;
par->sig = 0;
break;
default:
DPRINTF("sio_sun_infotoenc: unsupported encoding\n");
hdl->sio.eof = 1;
return 0;
}
return 1;
}
/*
* convert sio_par encoding to sun encoding
*/
static void
sio_sun_enctoinfo(struct sio_sun_hdl *hdl,
unsigned int *renc, struct sio_par *par)
{
if (par->le == ~0U && par->sig == ~0U) {
*renc = ~0U;
} else if (par->le == ~0U || par->sig == ~0U) {
*renc = AUDIO_ENCODING_SLINEAR;
} else if (par->le && par->sig) {
*renc = AUDIO_ENCODING_SLINEAR_LE;
} else if (!par->le && par->sig) {
*renc = AUDIO_ENCODING_SLINEAR_BE;
} else if (par->le && !par->sig) {
*renc = AUDIO_ENCODING_ULINEAR_LE;
} else {
*renc = AUDIO_ENCODING_ULINEAR_BE;
}
}
/*
* try to set the device to the given parameters and check that the
* device can use them; return 1 on success, 0 on failure or error
*/
static int
sio_sun_tryinfo(struct sio_sun_hdl *hdl, struct sio_enc *enc,
unsigned int pchan, unsigned int rchan, unsigned int rate)
{
struct audio_info aui;
struct audio_prinfo *pr;
pr = (hdl->sio.mode & SIO_PLAY) ? &aui.play : &aui.record;
AUDIO_INITINFO(&aui);
if (enc) {
if (enc->le && enc->sig) {
pr->encoding = AUDIO_ENCODING_SLINEAR_LE;
} else if (!enc->le && enc->sig) {
pr->encoding = AUDIO_ENCODING_SLINEAR_BE;
} else if (enc->le && !enc->sig) {
pr->encoding = AUDIO_ENCODING_ULINEAR_LE;
} else {
pr->encoding = AUDIO_ENCODING_ULINEAR_BE;
}
pr->precision = enc->bits;
}
if (rate)
pr->sample_rate = rate;
if ((hdl->sio.mode & (SIO_PLAY | SIO_REC)) == (SIO_PLAY | SIO_REC))
aui.record = aui.play;
if (pchan && (hdl->sio.mode & SIO_PLAY))
aui.play.channels = pchan;
if (rchan && (hdl->sio.mode & SIO_REC))
aui.record.channels = rchan;
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0) {
if (errno == EINVAL)
return 0;
DPERROR("sio_sun_tryinfo: setinfo");
hdl->sio.eof = 1;
return 0;
}
if (ioctl(hdl->fd, AUDIO_GETINFO, &aui) < 0) {
DPERROR("sio_sun_tryinfo: getinfo");
hdl->sio.eof = 1;
return 0;
}
if (pchan && aui.play.channels != pchan)
return 0;
if (rchan && aui.record.channels != rchan)
return 0;
if (rate) {
if ((hdl->sio.mode & SIO_PLAY) &&
(aui.play.sample_rate != rate))
return 0;
if ((hdl->sio.mode & SIO_REC) &&
(aui.record.sample_rate != rate))
return 0;
}
return 1;
}
/*
* guess device capabilities
*/
static int
sio_sun_getcap(struct sio_hdl *sh, struct sio_cap *cap)
{
#define NCHANS (sizeof(chans) / sizeof(chans[0]))
#define NRATES (sizeof(rates) / sizeof(rates[0]))
static unsigned int chans[] = {
1, 2, 4, 6, 8, 10, 12
};
static unsigned int rates[] = {
8000, 11025, 12000, 16000, 22050, 24000,
32000, 44100, 48000, 64000, 88200, 96000
};
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
struct sio_par savepar;
struct audio_encoding ae;
unsigned int nenc = 0, nconf = 0;
unsigned int enc_map = 0, rchan_map = 0, pchan_map = 0, rate_map;
unsigned int i, j, conf;
if (!sio_sun_getpar(&hdl->sio, &savepar))
return 0;
/*
* fill encoding list
*/
for (ae.index = 0; nenc < SIO_NENC; ae.index++) {
if (ioctl(hdl->fd, AUDIO_GETENC, &ae) < 0) {
if (errno == EINVAL)
break;
DPERROR("sio_sun_getcap: getenc");
hdl->sio.eof = 1;
return 0;
}
if (ae.flags & AUDIO_ENCODINGFLAG_EMULATED)
continue;
if (ae.encoding == AUDIO_ENCODING_SLINEAR_LE) {
cap->enc[nenc].le = 1;
cap->enc[nenc].sig = 1;
} else if (ae.encoding == AUDIO_ENCODING_SLINEAR_BE) {
cap->enc[nenc].le = 0;
cap->enc[nenc].sig = 1;
} else if (ae.encoding == AUDIO_ENCODING_ULINEAR_LE) {
cap->enc[nenc].le = 1;
cap->enc[nenc].sig = 0;
} else if (ae.encoding == AUDIO_ENCODING_ULINEAR_BE) {
cap->enc[nenc].le = 0;
cap->enc[nenc].sig = 0;
} else if (ae.encoding == AUDIO_ENCODING_SLINEAR) {
cap->enc[nenc].le = SIO_LE_NATIVE;
cap->enc[nenc].sig = 1;
} else if (ae.encoding == AUDIO_ENCODING_ULINEAR) {
cap->enc[nenc].le = SIO_LE_NATIVE;
cap->enc[nenc].sig = 0;
} else {
/* unsipported encoding */
continue;
}
cap->enc[nenc].bits = ae.precision;
cap->enc[nenc].bps = ae.bps;
cap->enc[nenc].msb = ae.msb;
enc_map |= (1 << nenc);
nenc++;
}
/*
* fill channels
*
* for now we're lucky: all kernel devices assume that the
* number of channels and the encoding are independent so we can
* use the current encoding and try various channels.
*/
if (hdl->sio.mode & SIO_PLAY) {
memcpy(&cap->pchan, chans, NCHANS * sizeof(unsigned int));
for (i = 0; i < NCHANS; i++) {
if (sio_sun_tryinfo(hdl, NULL, chans[i], 0, 0))
pchan_map |= (1 << i);
}
}
if (hdl->sio.mode & SIO_REC) {
memcpy(&cap->rchan, chans, NCHANS * sizeof(unsigned int));
for (i = 0; i < NCHANS; i++) {
if (sio_sun_tryinfo(hdl, NULL, 0, chans[i], 0))
rchan_map |= (1 << i);
}
}
/*
* fill rates
*
* rates are not independent from other parameters (eg. on
* uaudio devices), so certain rates may not be allowed with
* certain encodings. We have to check rates for all encodings
*/
memcpy(&cap->rate, rates, NRATES * sizeof(unsigned int));
for (j = 0; j < nenc; j++) {
rate_map = 0;
for (i = 0; i < NRATES; i++) {
if (sio_sun_tryinfo(hdl, &cap->enc[j], 0, 0, rates[i]))
rate_map |= (1 << i);
}
for (conf = 0; conf < nconf; conf++) {
if (cap->confs[conf].rate == rate_map) {
cap->confs[conf].enc |= (1 << j);
break;
}
}
if (conf == nconf) {
if (nconf == SIO_NCONF)
break;
cap->confs[nconf].enc = (1 << j);
cap->confs[nconf].pchan = pchan_map;
cap->confs[nconf].rchan = rchan_map;
cap->confs[nconf].rate = rate_map;
nconf++;
}
}
cap->nconf = nconf;
if (!sio_sun_setpar(&hdl->sio, &savepar))
return 0;
return 1;
#undef NCHANS
#undef NRATES
}
struct sio_hdl *
_sio_sun_open(const char *str, unsigned int mode, int nbio)
{
int fd, flags, fullduplex;
struct audio_info aui;
struct sio_sun_hdl *hdl;
struct sio_par par;
char path[PATH_MAX];
switch (*str) {
case '/':
str++;
break;
default:
DPRINTF("_sio_sun_open: %s: '/<devnum>' expected\n", str);
return NULL;
}
hdl = malloc(sizeof(struct sio_sun_hdl));
if (hdl == NULL)
return NULL;
_sio_create(&hdl->sio, &sio_sun_ops, mode, nbio);
snprintf(path, sizeof(path), "/dev/audio%s", str);
if (mode == (SIO_PLAY | SIO_REC))
flags = O_RDWR;
else
flags = (mode & SIO_PLAY) ? O_WRONLY : O_RDONLY;
while ((fd = open(path, flags | O_NONBLOCK | O_CLOEXEC)) < 0) {
if (errno == EINTR)
continue;
DPERROR(path);
goto bad_free;
}
/*
* pause the device
*/
AUDIO_INITINFO(&aui);
if (mode & SIO_PLAY)
aui.play.pause = 1;
if (mode & SIO_REC)
aui.record.pause = 1;
if (ioctl(fd, AUDIO_SETINFO, &aui) < 0) {
DPERROR("sio_open_sun: setinfo");
goto bad_close;
}
/*
* If both play and record are requested then
* set full duplex mode.
*/
if (mode == (SIO_PLAY | SIO_REC)) {
fullduplex = 1;
if (ioctl(fd, AUDIO_SETFD, &fullduplex) < 0) {
DPRINTF("sio_open_sun: %s: can't set full-duplex\n", path);
goto bad_close;
}
}
hdl->fd = fd;
/*
* Default parameters may not be compatible with libsndio (eg. mulaw
* encodings, different playback and recording parameters, etc...), so
* set parameters to a random value. If the requested parameters are
* not supported by the device, then sio_setpar() will pick supported
* ones.
*/
sio_initpar(&par);
par.rate = 48000;
par.le = SIO_LE_NATIVE;
par.sig = 1;
par.bits = 16;
par.appbufsz = 1200;
if (!sio_setpar(&hdl->sio, &par))
goto bad_close;
return (struct sio_hdl *)hdl;
bad_close:
while (close(fd) < 0 && errno == EINTR)
; /* retry */
bad_free:
free(hdl);
return NULL;
}
static void
sio_sun_close(struct sio_hdl *sh)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
while (close(hdl->fd) < 0 && errno == EINTR)
; /* retry */
free(hdl);
}
static int
sio_sun_start(struct sio_hdl *sh)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
struct audio_info aui;
hdl->obpf = hdl->sio.par.pchan * hdl->sio.par.bps;
hdl->ibpf = hdl->sio.par.rchan * hdl->sio.par.bps;
hdl->ibytes = 0;
hdl->obytes = 0;
hdl->ierr = 0;
hdl->oerr = 0;
hdl->idelta = 0;
hdl->odelta = 0;
if (hdl->sio.mode & SIO_PLAY) {
/*
* keep the device paused and let sio_sun_write() trigger the
* start later, to avoid buffer underruns
*/
hdl->filling = 1;
} else {
/*
* no play buffers to fill, start now!
*/
AUDIO_INITINFO(&aui);
if (hdl->sio.mode & SIO_REC)
aui.record.pause = 0;
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0) {
DPERROR("sio_sun_start: setinfo");
hdl->sio.eof = 1;
return 0;
}
hdl->filling = 0;
_sio_onmove_cb(&hdl->sio, 0);
}
return 1;
}
static int
sio_sun_stop(struct sio_hdl *sh)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
struct audio_info aui;
int mode;
if (ioctl(hdl->fd, AUDIO_GETINFO, &aui) < 0) {
DPERROR("sio_sun_stop: getinfo");
hdl->sio.eof = 1;
return 0;
}
mode = aui.mode;
/*
* there's no way to drain the device without blocking, so just
* stop it until the kernel driver get fixed
*/
AUDIO_INITINFO(&aui);
aui.mode = 0;
if (hdl->sio.mode & SIO_PLAY)
aui.play.pause = 1;
if (hdl->sio.mode & SIO_REC)
aui.record.pause = 1;
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0) {
DPERROR("sio_sun_stop: setinfo1");
hdl->sio.eof = 1;
return 0;
}
AUDIO_INITINFO(&aui);
aui.mode = mode;
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0) {
DPERROR("sio_sun_stop: setinfo2");
hdl->sio.eof = 1;
return 0;
}
return 1;
}
static int
sio_sun_setpar(struct sio_hdl *sh, struct sio_par *par)
{
#define NRETRIES 8
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
struct audio_info aui;
unsigned int i, infr, ibpf, onfr, obpf;
unsigned int bufsz, round;
unsigned int rate, req_rate, prec, enc;
/*
* try to set parameters until the device accepts
* a common encoding and rate for play and record
*/
rate = par->rate;
prec = par->bits;
sio_sun_enctoinfo(hdl, &enc, par);
for (i = 0;; i++) {
if (i == NRETRIES) {
DPRINTF("sio_sun_setpar: couldn't set parameters\n");
hdl->sio.eof = 1;
return 0;
}
AUDIO_INITINFO(&aui);
if (hdl->sio.mode & SIO_PLAY) {
aui.play.sample_rate = rate;
aui.play.precision = prec;
aui.play.encoding = enc;
aui.play.channels = par->pchan;
}
if (hdl->sio.mode & SIO_REC) {
aui.record.sample_rate = rate;
aui.record.precision = prec;
aui.record.encoding = enc;
aui.record.channels = par->rchan;
}
DPRINTFN(2, "sio_sun_setpar: %i: trying pars = %u/%u/%u\n",
i, rate, prec, enc);
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0 && errno != EINVAL) {
DPERROR("sio_sun_setpar: setinfo(pars)");
hdl->sio.eof = 1;
return 0;
}
if (ioctl(hdl->fd, AUDIO_GETINFO, &aui) < 0) {
DPERROR("sio_sun_setpar: getinfo(pars)");
hdl->sio.eof = 1;
return 0;
}
enc = (hdl->sio.mode & SIO_REC) ?
aui.record.encoding : aui.play.encoding;
switch (enc) {
case AUDIO_ENCODING_SLINEAR_LE:
case AUDIO_ENCODING_SLINEAR_BE:
case AUDIO_ENCODING_ULINEAR_LE:
case AUDIO_ENCODING_ULINEAR_BE:
case AUDIO_ENCODING_SLINEAR:
case AUDIO_ENCODING_ULINEAR:
break;
default:
DPRINTF("sio_sun_setpar: couldn't set linear encoding\n");
hdl->sio.eof = 1;
return 0;
}
if (hdl->sio.mode != (SIO_REC | SIO_PLAY))
break;
if (aui.play.sample_rate == aui.record.sample_rate &&
aui.play.precision == aui.record.precision &&
aui.play.encoding == aui.record.encoding)
break;
if (i < NRETRIES / 2) {
rate = aui.play.sample_rate;
prec = aui.play.precision;
enc = aui.play.encoding;
} else {
rate = aui.record.sample_rate;
prec = aui.record.precision;
enc = aui.record.encoding;
}
}
/*
* If the rate that the hardware is using is different than
* the requested rate, scale buffer sizes so they will be the
* same time duration as what was requested. This just gets
* the rates to use for scaling, that actual scaling is done
* later.
*/
rate = (hdl->sio.mode & SIO_REC) ? aui.record.sample_rate :
aui.play.sample_rate;
req_rate = rate;
if (par->rate && par->rate != ~0U)
req_rate = par->rate;
/*
* if block size and buffer size are not both set then
* set the blocksize to half the buffer size
*/
bufsz = par->appbufsz;
round = par->round;
if (bufsz != ~0U) {
bufsz = bufsz * rate / req_rate;
if (round == ~0U)
round = (bufsz + 1) / 2;
else
round = round * rate / req_rate;
} else if (round != ~0U) {
round = round * rate / req_rate;
bufsz = round * 2;
} else
return 1;
/*
* get the play/record frame size in bytes
*/
if (ioctl(hdl->fd, AUDIO_GETINFO, &aui) < 0) {
DPERROR("sio_sun_setpar: GETINFO");
hdl->sio.eof = 1;
return 0;
}
ibpf = (hdl->sio.mode & SIO_REC) ?
aui.record.channels * aui.record.bps : 1;
obpf = (hdl->sio.mode & SIO_PLAY) ?
aui.play.channels * aui.play.bps : 1;
DPRINTFN(2, "sio_sun_setpar: bpf = (%u, %u)\n", ibpf, obpf);
/*
* try to set parameters until the device accepts
* a common block size for play and record
*/
for (i = 0; i < NRETRIES; i++) {
AUDIO_INITINFO(&aui);
aui.hiwat = (bufsz + round - 1) / round;
aui.lowat = aui.hiwat;
if (hdl->sio.mode & SIO_REC)
aui.record.block_size = round * ibpf;
if (hdl->sio.mode & SIO_PLAY)
aui.play.block_size = round * obpf;
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0) {
DPERROR("sio_sun_setpar2: SETINFO");
hdl->sio.eof = 1;
return 0;
}
if (ioctl(hdl->fd, AUDIO_GETINFO, &aui) < 0) {
DPERROR("sio_sun_setpar2: GETINFO");
hdl->sio.eof = 1;
return 0;
}
infr = aui.record.block_size / ibpf;
onfr = aui.play.block_size / obpf;
DPRINTFN(2, "sio_sun_setpar: %i: trying round = %u -> (%u, %u)\n",
i, round, infr, onfr);
/*
* if half-duplex or both block sizes match, we're done
*/
if (hdl->sio.mode != (SIO_REC | SIO_PLAY) || infr == onfr) {
DPRINTFN(2, "sio_sun_setpar: blocksize ok\n");
return 1;
}
/*
* half of the retries, retry with the smaller value,
* then with the larger returned value
*/
if (i < NRETRIES / 2)
round = infr < onfr ? infr : onfr;
else
round = infr < onfr ? onfr : infr;
}
DPRINTFN(2, "sio_sun_setpar: couldn't find a working blocksize\n");
hdl->sio.eof = 1;
return 0;
#undef NRETRIES
}
static int
sio_sun_getpar(struct sio_hdl *sh, struct sio_par *par)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
struct audio_info aui;
if (ioctl(hdl->fd, AUDIO_GETINFO, &aui) < 0) {
DPERROR("sio_sun_getpar: getinfo");
hdl->sio.eof = 1;
return 0;
}
if (hdl->sio.mode & SIO_PLAY) {
par->rate = aui.play.sample_rate;
if (!sio_sun_infotoenc(hdl, &aui.play, par))
return 0;
} else if (hdl->sio.mode & SIO_REC) {
par->rate = aui.record.sample_rate;
if (!sio_sun_infotoenc(hdl, &aui.record, par))
return 0;
} else
return 0;
par->pchan = (hdl->sio.mode & SIO_PLAY) ?
aui.play.channels : 0;
par->rchan = (hdl->sio.mode & SIO_REC) ?
aui.record.channels : 0;
par->round = (hdl->sio.mode & SIO_REC) ?
aui.record.block_size / (par->bps * par->rchan) :
aui.play.block_size / (par->bps * par->pchan);
par->appbufsz = aui.hiwat * par->round;
par->bufsz = par->appbufsz;
par->xrun = SIO_IGNORE;
return 1;
}
static size_t
sio_sun_read(struct sio_hdl *sh, void *buf, size_t len)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
ssize_t n;
while ((n = read(hdl->fd, buf, len)) < 0) {
if (errno == EINTR)
continue;
if (errno != EAGAIN) {
DPERROR("sio_sun_read: read");
hdl->sio.eof = 1;
}
return 0;
}
if (n == 0) {
DPRINTF("sio_sun_read: eof\n");
hdl->sio.eof = 1;
return 0;
}
return n;
}
static size_t
sio_sun_autostart(struct sio_sun_hdl *hdl)
{
struct audio_info aui;
struct pollfd pfd;
pfd.fd = hdl->fd;
pfd.events = POLLOUT;
while (poll(&pfd, 1, 0) < 0) {
if (errno == EINTR)
continue;
DPERROR("sio_sun_autostart: poll");
hdl->sio.eof = 1;
return 0;
}
if (!(pfd.revents & POLLOUT)) {
hdl->filling = 0;
AUDIO_INITINFO(&aui);
if (hdl->sio.mode & SIO_PLAY)
aui.play.pause = 0;
if (hdl->sio.mode & SIO_REC)
aui.record.pause = 0;
if (ioctl(hdl->fd, AUDIO_SETINFO, &aui) < 0) {
DPERROR("sio_sun_autostart: setinfo");
hdl->sio.eof = 1;
return 0;
}
_sio_onmove_cb(&hdl->sio, 0);
}
return 1;
}
static size_t
sio_sun_write(struct sio_hdl *sh, const void *buf, size_t len)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
const unsigned char *data = buf;
ssize_t n, todo;
todo = len;
while ((n = write(hdl->fd, data, todo)) < 0) {
if (errno == EINTR)
continue;
if (errno != EAGAIN) {
DPERROR("sio_sun_write: write");
hdl->sio.eof = 1;
}
return 0;
}
if (hdl->filling) {
if (!sio_sun_autostart(hdl))
return 0;
}
return n;
}
static int
sio_sun_nfds(struct sio_hdl *hdl)
{
return 1;
}
static int
sio_sun_pollfd(struct sio_hdl *sh, struct pollfd *pfd, int events)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
pfd->fd = hdl->fd;
pfd->events = events;
return 1;
}
int
sio_sun_revents(struct sio_hdl *sh, struct pollfd *pfd)
{
struct sio_sun_hdl *hdl = (struct sio_sun_hdl *)sh;
struct audio_offset ao;
int xrun, dierr = 0, doerr = 0, offset, delta;
int revents = pfd->revents;
if (!hdl->sio.started)
return pfd->revents;
if (hdl->sio.mode & SIO_PLAY) {
if (ioctl(hdl->fd, AUDIO_GETOOFFS, &ao) < 0) {
DPERROR("sio_sun_revents: GETOOFFS");
hdl->sio.eof = 1;
return POLLHUP;
}
delta = (ao.samples - hdl->obytes) / hdl->obpf;
hdl->obytes = ao.samples;
hdl->odelta += delta;
if (!(hdl->sio.mode & SIO_REC))
hdl->idelta += delta;
}
if (hdl->sio.mode & SIO_REC) {
if (ioctl(hdl->fd, AUDIO_GETIOFFS, &ao) < 0) {
DPERROR("sio_sun_revents: GETIOFFS");
hdl->sio.eof = 1;
return POLLHUP;
}
delta = (ao.samples - hdl->ibytes) / hdl->ibpf;
hdl->ibytes = ao.samples;
hdl->idelta += delta;
if (!(hdl->sio.mode & SIO_PLAY))
hdl->odelta += delta;
}
if (hdl->sio.mode & SIO_PLAY) {
if (ioctl(hdl->fd, AUDIO_PERROR, &xrun) < 0) {
DPERROR("sio_sun_revents: PERROR");
hdl->sio.eof = 1;
return POLLHUP;
}
doerr = xrun - hdl->oerr;
hdl->oerr = xrun;
if (!(hdl->sio.mode & SIO_REC))
dierr = doerr;
if (doerr > 0)
DPRINTFN(2, "play xrun %d\n", doerr);
}
if (hdl->sio.mode & SIO_REC) {
if (ioctl(hdl->fd, AUDIO_RERROR, &xrun) < 0) {
DPERROR("sio_sun_revents: RERROR");
hdl->sio.eof = 1;
return POLLHUP;
}
dierr = xrun - hdl->ierr;
hdl->ierr = xrun;
if (!(hdl->sio.mode & SIO_PLAY))
doerr = dierr;
if (dierr > 0)
DPRINTFN(2, "rec xrun %d\n", dierr);
}
/*
* GET{I,O}OFFS report positions including xruns,
* so we have to substract to get the real position
*/
hdl->idelta -= dierr;
hdl->odelta -= doerr;
offset = doerr - dierr;
if (offset > 0) {
hdl->sio.rdrop += offset * hdl->ibpf;
hdl->idelta -= offset;
DPRINTFN(2, "will drop %d and pause %d\n", offset, doerr);
} else if (offset < 0) {
hdl->sio.wsil += -offset * hdl->obpf;
hdl->odelta -= offset;
DPRINTFN(2, "will insert %d and pause %d\n", -offset, dierr);
}
delta = (hdl->idelta > hdl->odelta) ? hdl->idelta : hdl->odelta;
if (delta > 0) {
_sio_onmove_cb(&hdl->sio, delta);
hdl->idelta -= delta;
hdl->odelta -= delta;
}
if (hdl->filling)
revents |= POLLOUT; /* XXX: is this necessary ? */
return revents;
}
|