VirtualBox

source: vbox/trunk/src/VBox/Devices/Audio/ossaudio.c@ 40754

Last change on this file since 40754 was 35353, checked in by vboxsync, 13 years ago

Move the misc files the in src/VBox/Devices/ directory into a build/ subdirectory, changing their names to match the target module.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 22.5 KB
Line 
1/*
2 * QEMU OSS audio driver
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#ifdef VBOX
25#define LOG_GROUP LOG_GROUP_DEV_AUDIO
26#include <VBox/log.h>
27#endif
28#include <fcntl.h>
29#include <errno.h>
30#include <stdlib.h>
31#include <unistd.h>
32#include <sys/mman.h>
33#include <sys/types.h>
34#include <sys/ioctl.h>
35#include <sys/soundcard.h>
36
37#include "VBoxDD.h"
38#include "vl_vbox.h"
39#include "audio.h"
40#include <iprt/alloc.h>
41
42#define AUDIO_CAP "oss"
43#include "audio_int.h"
44
45typedef struct OSSVoiceOut {
46 HWVoiceOut hw;
47 void *pcm_buf;
48 int fd;
49 int nfrags;
50 int fragsize;
51#ifndef RT_OS_L4
52 int mmapped;
53#endif
54 int old_optr;
55} OSSVoiceOut;
56
57typedef struct OSSVoiceIn {
58 HWVoiceIn hw;
59 void *pcm_buf;
60 int fd;
61 int nfrags;
62 int fragsize;
63 int old_optr;
64} OSSVoiceIn;
65
66static struct {
67#ifndef RT_OS_L4
68 int try_mmap;
69#endif
70 int nfrags;
71 int fragsize;
72 const char *devpath_out;
73 const char *devpath_in;
74 int debug;
75} conf = {
76#ifndef RT_OS_L4
77 INIT_FIELD (try_mmap =) 0,
78#endif
79 INIT_FIELD (nfrags =) 4,
80 INIT_FIELD (fragsize =) 4096,
81 INIT_FIELD (devpath_out =) "/dev/dsp",
82 INIT_FIELD (devpath_in =) "/dev/dsp",
83 INIT_FIELD (debug =) 0,
84};
85
86struct oss_params {
87 int freq;
88 audfmt_e fmt;
89 int nchannels;
90 int nfrags;
91 int fragsize;
92};
93
94static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
95{
96 va_list ap;
97
98 va_start (ap, fmt);
99 AUD_vlog (AUDIO_CAP, fmt, ap);
100 va_end (ap);
101
102 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
103}
104
105#ifndef VBOX
106static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
107 int err,
108 const char *typ,
109 const char *fmt,
110 ...
111 )
112{
113 va_list ap;
114
115 AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
116
117 va_start (ap, fmt);
118 AUD_vlog (AUDIO_CAP, fmt, ap);
119 va_end (ap);
120
121 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
122}
123#endif
124
125static void oss_anal_close (int *fdp)
126{
127 int err = close (*fdp);
128 if (err) {
129 oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
130 }
131 *fdp = -1;
132}
133
134static int oss_write (SWVoiceOut *sw, void *buf, int len)
135{
136 return audio_pcm_sw_write (sw, buf, len);
137}
138
139static int aud_to_ossfmt (audfmt_e fmt)
140{
141 switch (fmt) {
142 case AUD_FMT_S8:
143 return AFMT_S8;
144
145 case AUD_FMT_U8:
146 return AFMT_U8;
147
148 case AUD_FMT_S16:
149 return AFMT_S16_LE;
150
151 case AUD_FMT_U16:
152 return AFMT_U16_LE;
153
154 default:
155 dolog ("Internal logic error: Bad audio format %d\n", fmt);
156#ifdef DEBUG_AUDIO
157 abort ();
158#endif
159 return AFMT_U8;
160 }
161}
162
163static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness)
164{
165 switch (ossfmt) {
166 case AFMT_S8:
167 *endianness = 0;
168 *fmt = AUD_FMT_S8;
169 break;
170
171 case AFMT_U8:
172 *endianness = 0;
173 *fmt = AUD_FMT_U8;
174 break;
175
176 case AFMT_S16_LE:
177 *endianness = 0;
178 *fmt = AUD_FMT_S16;
179 break;
180
181 case AFMT_U16_LE:
182 *endianness = 0;
183 *fmt = AUD_FMT_U16;
184 break;
185
186 case AFMT_S16_BE:
187 *endianness = 1;
188 *fmt = AUD_FMT_S16;
189 break;
190
191 case AFMT_U16_BE:
192 *endianness = 1;
193 *fmt = AUD_FMT_U16;
194 break;
195
196 default:
197 dolog ("Unrecognized audio format %d\n", ossfmt);
198 return -1;
199 }
200
201 return 0;
202}
203
204#if defined DEBUG_MISMATCHES || defined DEBUG
205static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
206{
207 dolog ("parameter | requested value | obtained value\n");
208 dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
209 dolog ("channels | %10d | %10d\n",
210 req->nchannels, obt->nchannels);
211 dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
212 dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
213 dolog ("fragsize | %10d | %10d\n",
214 req->fragsize, obt->fragsize);
215}
216#endif
217
218static int oss_open (int in, struct oss_params *req,
219 struct oss_params *obt, int *pfd)
220{
221 int fd;
222 int mmmmssss;
223 audio_buf_info abinfo;
224 int fmt, freq, nchannels;
225 const char *dspname = in ? conf.devpath_in : conf.devpath_out;
226 const char *typ = in ? "ADC" : "DAC";
227
228 fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | O_NONBLOCK);
229 if (-1 == fd) {
230#ifndef VBOX
231 oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
232#else
233 LogRel(("OSS: Failed to open %s for %s (%s)\n",
234 dspname, typ, strerror(errno)));
235#endif
236 return -1;
237 }
238
239#ifdef VBOX
240 LogRel(("OSS: Successfully opened %s for %s\n", dspname, typ));
241#endif
242
243 freq = req->freq;
244 nchannels = req->nchannels;
245 fmt = req->fmt;
246
247 if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
248#ifndef VBOX
249 oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
250#else
251 LogRel(("OSS: Failed to set sample size %d (%s)\n",
252 req->fmt, strerror(errno)));
253#endif
254 goto err;
255 }
256
257 if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
258#ifndef VBOX
259 oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
260 req->nchannels);
261#else
262 LogRel(("OSS: Failed to set nchannels=%d (%s)\n",
263 req->nchannels, strerror(errno)));
264#endif
265 goto err;
266 }
267
268 if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
269#ifndef VBOX
270 oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
271#else
272 LogRel(("OSS: Failed to set freq=%dHZ\n", req->freq, strerror(errno)));
273#endif
274 goto err;
275 }
276
277/* Obsolete on Solaris (using O_NONBLOCK is sufficient) */
278#if !(defined(VBOX) && defined(RT_OS_SOLARIS))
279 if (ioctl (fd, SNDCTL_DSP_NONBLOCK)) {
280# ifndef VBOX
281 oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
282# else
283 LogRel(("OSS: Failed to set non-blocking mode (%s)\n", strerror(errno)));
284# endif
285 goto err;
286 }
287#endif
288
289 mmmmssss = (req->nfrags << 16) | lsbindex (req->fragsize);
290 if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
291#ifndef VBOX
292 oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
293 req->nfrags, req->fragsize);
294#else
295 LogRel(("OSS: Failed to set buffer_length=%d,%d (%s)\n",
296 req->nfrags, req->fragsize, strerror(errno)));
297#endif
298 goto err;
299 }
300
301 if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
302#ifndef VBOX
303 oss_logerr2 (errno, typ, "Failed to get buffer length\n");
304#else
305 LogRel(("OSS: Failed to get buffer length (%s)\n", strerror(errno)));
306#endif
307 goto err;
308 }
309
310 obt->fmt = fmt;
311 obt->nchannels = nchannels;
312 obt->freq = freq;
313 obt->nfrags = abinfo.fragstotal;
314 obt->fragsize = abinfo.fragsize;
315 *pfd = fd;
316
317#ifdef DEBUG_MISMATCHES
318 if ((req->fmt != obt->fmt) ||
319 (req->nchannels != obt->nchannels) ||
320 (req->freq != obt->freq) ||
321 (req->fragsize != obt->fragsize) ||
322 (req->nfrags != obt->nfrags)) {
323 dolog ("Audio parameters mismatch\n");
324 oss_dump_info (req, obt);
325 }
326#endif
327
328#ifdef DEBUG
329 oss_dump_info (req, obt);
330#endif
331 return 0;
332
333 err:
334 oss_anal_close (&fd);
335#ifdef VBOX
336 LogRel(("OSS: Closed %s for %s\n",
337 in ? conf.devpath_in : conf.devpath_out, in ? "ADC" : "DAC"));
338#endif
339 return -1;
340}
341
342static int oss_run_out (HWVoiceOut *hw)
343{
344 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
345 int err, rpos, live, decr;
346 int samples;
347 uint8_t *dst;
348 st_sample_t *src;
349 struct audio_buf_info abinfo;
350#ifndef RT_OS_L4
351 struct count_info cntinfo;
352#endif
353 int bufsize;
354
355 live = audio_pcm_hw_get_live_out (hw);
356 if (!live) {
357 return 0;
358 }
359
360 bufsize = hw->samples << hw->info.shift;
361
362#ifndef RT_OS_L4
363 if (oss->mmapped) {
364 int bytes;
365
366 err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
367 if (err < 0) {
368 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
369 return 0;
370 }
371
372 if (cntinfo.ptr == oss->old_optr) {
373 if (abs (hw->samples - live) < 64) {
374 dolog ("warning: Overrun\n");
375 }
376 return 0;
377 }
378
379 if (cntinfo.ptr > oss->old_optr) {
380 bytes = cntinfo.ptr - oss->old_optr;
381 }
382 else {
383 bytes = bufsize + cntinfo.ptr - oss->old_optr;
384 }
385
386 decr = audio_MIN (bytes >> hw->info.shift, live);
387 }
388 else {
389#endif
390 err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
391 if (err < 0) {
392 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
393 return 0;
394 }
395
396 if (abinfo.bytes > bufsize) {
397 if (conf.debug) {
398 dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
399 "please report your OS/audio hw to malc@pulsesoft.com\n",
400 abinfo.bytes, bufsize);
401 }
402 abinfo.bytes = bufsize;
403 }
404
405 if (abinfo.bytes < 0) {
406 if (conf.debug) {
407 dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
408 abinfo.bytes, bufsize);
409 }
410 return 0;
411 }
412
413 decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
414 if (!decr) {
415 return 0;
416 }
417#ifndef RT_OS_L4
418 }
419#endif
420
421 samples = decr;
422 rpos = hw->rpos;
423 while (samples) {
424 int left_till_end_samples = hw->samples - rpos;
425 int convert_samples = audio_MIN (samples, left_till_end_samples);
426
427 src = hw->mix_buf + rpos;
428 dst = advance (oss->pcm_buf, rpos << hw->info.shift);
429
430 hw->clip (dst, src, convert_samples);
431#ifdef RT_OS_L4
432 {
433#else
434 if (!oss->mmapped) {
435#endif
436 int written;
437
438 written = write (oss->fd, dst, convert_samples << hw->info.shift);
439 /* XXX: follow errno recommendations ? */
440 if (written == -1) {
441 oss_logerr (
442 errno,
443 "Failed to write %d bytes of audio data from %p\n",
444 convert_samples << hw->info.shift,
445 dst
446 );
447 continue;
448 }
449
450 if (written != convert_samples << hw->info.shift) {
451 int wsamples = written >> hw->info.shift;
452 int wbytes = wsamples << hw->info.shift;
453 if (wbytes != written) {
454 dolog ("warning: Misaligned write %d (requested %d), "
455 "alignment %d\n",
456 wbytes, written, hw->info.align + 1);
457 }
458#if 0
459 mixeng_sniff_and_clear (hw, src, dst, wsamples);
460#endif
461 decr -= wsamples;
462 rpos = (rpos + wsamples) % hw->samples;
463 break;
464 }
465 }
466
467#if 0
468 mixeng_sniff_and_clear (hw, src, dst, convert_samples);
469#endif
470
471 rpos = (rpos + convert_samples) % hw->samples;
472 samples -= convert_samples;
473 }
474
475#ifndef RT_OS_L4
476 if (oss->mmapped) {
477 oss->old_optr = cntinfo.ptr;
478 }
479#endif
480
481 hw->rpos = rpos;
482 return decr;
483}
484
485static void oss_fini_out (HWVoiceOut *hw)
486{
487#ifndef RT_OS_L4
488 int err;
489#endif
490 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
491
492 ldebug ("oss_fini\n");
493 oss_anal_close (&oss->fd);
494#ifdef VBOX
495 LogRel(("OSS: Closed %s for DAC\n", conf.devpath_out));
496#endif
497
498 if (oss->pcm_buf) {
499#ifdef RT_OS_L4
500 qemu_free (oss->pcm_buf);
501#else
502 if (oss->mmapped) {
503 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
504 if (err) {
505 oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
506 oss->pcm_buf, hw->samples << hw->info.shift);
507 }
508 }
509 else {
510 qemu_free (oss->pcm_buf);
511 }
512#endif
513 oss->pcm_buf = NULL;
514 }
515}
516
517static int oss_init_out (HWVoiceOut *hw, audsettings_t *as)
518{
519 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
520 struct oss_params req, obt;
521 int endianness;
522 int err;
523 int fd;
524 audfmt_e effective_fmt;
525 audsettings_t obt_as;
526
527 oss->fd = -1;
528
529 req.fmt = aud_to_ossfmt (as->fmt);
530 req.freq = as->freq;
531 req.nchannels = as->nchannels;
532 req.fragsize = conf.fragsize;
533 req.nfrags = conf.nfrags;
534
535 if (oss_open (0, &req, &obt, &fd)) {
536 return -1;
537 }
538
539 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
540 if (err) {
541 oss_anal_close (&fd);
542#ifdef VBOX
543 LogRel(("OSS: Closed %s for DAC\n", conf.devpath_out));
544#endif
545 return -1;
546 }
547
548 obt_as.freq = obt.freq;
549 obt_as.nchannels = obt.nchannels;
550 obt_as.fmt = effective_fmt;
551 obt_as.endianness = endianness;
552
553 audio_pcm_init_info (&hw->info, &obt_as);
554 oss->nfrags = obt.nfrags;
555 oss->fragsize = obt.fragsize;
556
557 if (obt.nfrags * obt.fragsize & hw->info.align) {
558 dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
559 obt.nfrags * obt.fragsize, hw->info.align + 1);
560 }
561
562 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
563
564#ifndef RT_OS_L4
565 oss->mmapped = 0;
566 if (conf.try_mmap) {
567 oss->pcm_buf = mmap (
568 0,
569 hw->samples << hw->info.shift,
570 PROT_READ | PROT_WRITE,
571 MAP_SHARED,
572 fd,
573 0
574 );
575 if (oss->pcm_buf == MAP_FAILED) {
576 oss_logerr (errno, "Failed to map %d bytes of DAC\n",
577 hw->samples << hw->info.shift);
578 } else {
579# ifndef VBOX /* -Wshadow */
580 int err;
581# endif
582 int trig = 0;
583 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
584 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
585 }
586 else {
587 trig = PCM_ENABLE_OUTPUT;
588 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
589 oss_logerr (
590 errno,
591 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
592 );
593 }
594 else {
595 oss->mmapped = 1;
596 }
597 }
598
599 if (!oss->mmapped) {
600 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
601 if (err) {
602 oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
603 oss->pcm_buf, hw->samples << hw->info.shift);
604 }
605 }
606 }
607 }
608#endif
609
610#ifndef RT_OS_L4
611 if (!oss->mmapped) {
612#endif
613 oss->pcm_buf = audio_calloc (
614 AUDIO_FUNC,
615 hw->samples,
616 1 << hw->info.shift
617 );
618 if (!oss->pcm_buf) {
619 dolog (
620 "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
621 hw->samples,
622 1 << hw->info.shift
623 );
624 oss_anal_close (&fd);
625#ifdef VBOX
626 LogRel(("OSS: Closed %s for DAC\n", conf.devpath_out));
627#endif
628 return -1;
629 }
630#ifndef RT_OS_L4
631 }
632#endif
633
634 oss->fd = fd;
635 return 0;
636}
637
638static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
639{
640 int trig;
641 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
642
643#ifdef RT_OS_L4
644 return 0;
645#else
646 if (!oss->mmapped) {
647 return 0;
648 }
649#endif
650
651 switch (cmd) {
652 case VOICE_ENABLE:
653 ldebug ("enabling voice\n");
654 audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
655 trig = PCM_ENABLE_OUTPUT;
656 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
657 oss_logerr (
658 errno,
659 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
660 );
661 return -1;
662 }
663 break;
664
665 case VOICE_DISABLE:
666 ldebug ("disabling voice\n");
667 trig = 0;
668 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
669 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
670 return -1;
671 }
672 break;
673 }
674 return 0;
675}
676
677static int oss_init_in (HWVoiceIn *hw, audsettings_t *as)
678{
679 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
680 struct oss_params req, obt;
681 int endianness;
682 int err;
683 int fd;
684 audfmt_e effective_fmt;
685 audsettings_t obt_as;
686
687 oss->fd = -1;
688
689 req.fmt = aud_to_ossfmt (as->fmt);
690 req.freq = as->freq;
691 req.nchannels = as->nchannels;
692 req.fragsize = conf.fragsize;
693 req.nfrags = conf.nfrags;
694 if (oss_open (1, &req, &obt, &fd)) {
695 return -1;
696 }
697
698 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
699 if (err) {
700 oss_anal_close (&fd);
701#ifdef VBOX
702 LogRel(("OSS: Closed %s for ADC\n", conf.devpath_in));
703#endif
704 return -1;
705 }
706
707 obt_as.freq = obt.freq;
708 obt_as.nchannels = obt.nchannels;
709 obt_as.fmt = effective_fmt;
710 obt_as.endianness = endianness;
711
712 audio_pcm_init_info (&hw->info, &obt_as);
713 oss->nfrags = obt.nfrags;
714 oss->fragsize = obt.fragsize;
715
716 if (obt.nfrags * obt.fragsize & hw->info.align) {
717 dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
718 obt.nfrags * obt.fragsize, hw->info.align + 1);
719 }
720
721 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
722 oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
723 if (!oss->pcm_buf) {
724 dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
725 hw->samples, 1 << hw->info.shift);
726 oss_anal_close (&fd);
727#ifdef VBOX
728 LogRel(("OSS: Closed %s for ADC\n", conf.devpath_in));
729#endif
730 return -1;
731 }
732
733 oss->fd = fd;
734 return 0;
735}
736
737static void oss_fini_in (HWVoiceIn *hw)
738{
739 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
740
741 oss_anal_close (&oss->fd);
742#ifdef VBOX
743 LogRel(("OSS: Closed %s for ADC\n", conf.devpath_in));
744#endif
745
746 if (oss->pcm_buf) {
747 qemu_free (oss->pcm_buf);
748 oss->pcm_buf = NULL;
749 }
750}
751
752static int oss_run_in (HWVoiceIn *hw)
753{
754 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
755 int hwshift = hw->info.shift;
756 int i;
757 int live = audio_pcm_hw_get_live_in (hw);
758 int dead = hw->samples - live;
759 size_t read_samples = 0;
760 struct {
761 int add;
762 int len;
763 } bufs[2];
764
765 bufs[0].add = hw->wpos;
766 bufs[0].len = 0;
767 bufs[1].add = 0;
768 bufs[1].len = 0;
769
770 if (!dead) {
771 return 0;
772 }
773
774 if (hw->wpos + dead > hw->samples) {
775 bufs[0].len = (hw->samples - hw->wpos) << hwshift;
776 bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
777 }
778 else {
779 bufs[0].len = dead << hwshift;
780 }
781
782
783 for (i = 0; i < 2; ++i) {
784 ssize_t nread;
785
786 if (bufs[i].len) {
787 void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
788 nread = read (oss->fd, p, bufs[i].len);
789
790 if (nread > 0) {
791 if (nread & hw->info.align) {
792 dolog ("warning: Misaligned read %"
793 FMTZ "d (requested %d), "
794 "alignment %d\n", nread, bufs[i].add << hwshift,
795 hw->info.align + 1);
796 }
797 read_samples += nread >> hwshift;
798#ifndef VBOX
799 hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
800 &nominal_volume);
801#else
802 hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
803 &pcm_in_volume);
804#endif
805 }
806
807 if (bufs[i].len - nread) {
808 if (nread == -1) {
809 switch (errno) {
810 case EINTR:
811 case EAGAIN:
812 break;
813 default:
814 oss_logerr (
815 errno,
816 "Failed to read %d bytes of audio (to %p)\n",
817 bufs[i].len, p
818 );
819 break;
820 }
821 }
822 break;
823 }
824 }
825 }
826
827 hw->wpos = (hw->wpos + read_samples) % hw->samples;
828 return read_samples;
829}
830
831static int oss_read (SWVoiceIn *sw, void *buf, int size)
832{
833 return audio_pcm_sw_read (sw, buf, size);
834}
835
836static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
837{
838 (void) hw;
839 (void) cmd;
840 return 0;
841}
842
843static void *oss_audio_init (void)
844{
845 return &conf;
846}
847
848static void oss_audio_fini (void *opaque)
849{
850 (void) opaque;
851}
852
853static struct audio_option oss_options[] = {
854 {"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
855 "Fragment size in bytes", NULL, 0},
856 {"NFRAGS", AUD_OPT_INT, &conf.nfrags,
857 "Number of fragments", NULL, 0},
858#ifndef RT_OS_L4
859 {"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
860 "Try using memory mapped access", NULL, 0},
861#endif
862 {"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
863 "Path to DAC device", NULL, 0},
864 {"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
865 "Path to ADC device", NULL, 0},
866 {"DEBUG", AUD_OPT_BOOL, &conf.debug,
867 "Turn on some debugging messages", NULL, 0},
868 {NULL, 0, NULL, NULL, NULL, 0}
869};
870
871static struct audio_pcm_ops oss_pcm_ops = {
872 oss_init_out,
873 oss_fini_out,
874 oss_run_out,
875 oss_write,
876 oss_ctl_out,
877
878 oss_init_in,
879 oss_fini_in,
880 oss_run_in,
881 oss_read,
882 oss_ctl_in
883};
884
885struct audio_driver oss_audio_driver = {
886 INIT_FIELD (name = ) "oss",
887 INIT_FIELD (descr = ) "OSS http://www.opensound.com",
888 INIT_FIELD (options = ) oss_options,
889 INIT_FIELD (init = ) oss_audio_init,
890 INIT_FIELD (fini = ) oss_audio_fini,
891 INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
892 INIT_FIELD (can_be_default = ) 1,
893 INIT_FIELD (max_voices_out = ) INT_MAX,
894 INIT_FIELD (max_voices_in = ) INT_MAX,
895 INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
896 INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)
897};
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