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
25 #include "qemu/osdep.h"
26 #include <sys/ioctl.h>
27 #include <sys/soundcard.h>
28 #include "qemu/main-loop.h"
29 #include "qemu/module.h"
30 #include "qemu/host-utils.h"
31 #include "qapi/error.h"
32 #include "audio.h"
33 #include "trace.h"
34
35 #define AUDIO_CAP "oss"
36 #include "audio_int.h"
37
38 #if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
39 #define USE_DSP_POLICY
40 #endif
41
42 typedef struct OSSVoiceOut {
43 HWVoiceOut hw;
44 int fd;
45 int nfrags;
46 int fragsize;
47 int mmapped;
48 Audiodev *dev;
49 } OSSVoiceOut;
50
51 typedef struct OSSVoiceIn {
52 HWVoiceIn hw;
53 int fd;
54 int nfrags;
55 int fragsize;
56 Audiodev *dev;
57 } OSSVoiceIn;
58
59 struct oss_params {
60 int freq;
61 int fmt;
62 int nchannels;
63 int nfrags;
64 int fragsize;
65 };
66
oss_logerr(int err,const char * fmt,...)67 static void G_GNUC_PRINTF (2, 3) oss_logerr (int err, const char *fmt, ...)
68 {
69 va_list ap;
70
71 va_start (ap, fmt);
72 AUD_vlog (AUDIO_CAP, fmt, ap);
73 va_end (ap);
74
75 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
76 }
77
oss_logerr2(int err,const char * typ,const char * fmt,...)78 static void G_GNUC_PRINTF (3, 4) oss_logerr2 (
79 int err,
80 const char *typ,
81 const char *fmt,
82 ...
83 )
84 {
85 va_list ap;
86
87 AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
88
89 va_start (ap, fmt);
90 AUD_vlog (AUDIO_CAP, fmt, ap);
91 va_end (ap);
92
93 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
94 }
95
oss_anal_close(int * fdp)96 static void oss_anal_close (int *fdp)
97 {
98 int err;
99
100 qemu_set_fd_handler (*fdp, NULL, NULL, NULL);
101 err = close (*fdp);
102 if (err) {
103 oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
104 }
105 *fdp = -1;
106 }
107
oss_helper_poll_out(void * opaque)108 static void oss_helper_poll_out (void *opaque)
109 {
110 AudioState *s = opaque;
111 audio_run(s, "oss_poll_out");
112 }
113
oss_helper_poll_in(void * opaque)114 static void oss_helper_poll_in (void *opaque)
115 {
116 AudioState *s = opaque;
117 audio_run(s, "oss_poll_in");
118 }
119
oss_poll_out(HWVoiceOut * hw)120 static void oss_poll_out (HWVoiceOut *hw)
121 {
122 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
123
124 qemu_set_fd_handler(oss->fd, NULL, oss_helper_poll_out, hw->s);
125 }
126
oss_poll_in(HWVoiceIn * hw)127 static void oss_poll_in (HWVoiceIn *hw)
128 {
129 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
130
131 qemu_set_fd_handler(oss->fd, oss_helper_poll_in, NULL, hw->s);
132 }
133
aud_to_ossfmt(AudioFormat fmt,int endianness)134 static int aud_to_ossfmt (AudioFormat fmt, int endianness)
135 {
136 switch (fmt) {
137 case AUDIO_FORMAT_S8:
138 return AFMT_S8;
139
140 case AUDIO_FORMAT_U8:
141 return AFMT_U8;
142
143 case AUDIO_FORMAT_S16:
144 if (endianness) {
145 return AFMT_S16_BE;
146 } else {
147 return AFMT_S16_LE;
148 }
149
150 case AUDIO_FORMAT_U16:
151 if (endianness) {
152 return AFMT_U16_BE;
153 } else {
154 return AFMT_U16_LE;
155 }
156
157 default:
158 dolog ("Internal logic error: Bad audio format %d\n", fmt);
159 #ifdef DEBUG_AUDIO
160 abort ();
161 #endif
162 return AFMT_U8;
163 }
164 }
165
oss_to_audfmt(int ossfmt,AudioFormat * fmt,int * endianness)166 static int oss_to_audfmt (int ossfmt, AudioFormat *fmt, int *endianness)
167 {
168 switch (ossfmt) {
169 case AFMT_S8:
170 *endianness = 0;
171 *fmt = AUDIO_FORMAT_S8;
172 break;
173
174 case AFMT_U8:
175 *endianness = 0;
176 *fmt = AUDIO_FORMAT_U8;
177 break;
178
179 case AFMT_S16_LE:
180 *endianness = 0;
181 *fmt = AUDIO_FORMAT_S16;
182 break;
183
184 case AFMT_U16_LE:
185 *endianness = 0;
186 *fmt = AUDIO_FORMAT_U16;
187 break;
188
189 case AFMT_S16_BE:
190 *endianness = 1;
191 *fmt = AUDIO_FORMAT_S16;
192 break;
193
194 case AFMT_U16_BE:
195 *endianness = 1;
196 *fmt = AUDIO_FORMAT_U16;
197 break;
198
199 default:
200 dolog ("Unrecognized audio format %d\n", ossfmt);
201 return -1;
202 }
203
204 return 0;
205 }
206
207 #if defined DEBUG_MISMATCHES || defined DEBUG
oss_dump_info(struct oss_params * req,struct oss_params * obt)208 static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
209 {
210 dolog ("parameter | requested value | obtained value\n");
211 dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
212 dolog ("channels | %10d | %10d\n",
213 req->nchannels, obt->nchannels);
214 dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
215 dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
216 dolog ("fragsize | %10d | %10d\n",
217 req->fragsize, obt->fragsize);
218 }
219 #endif
220
221 #ifdef USE_DSP_POLICY
oss_get_version(int fd,int * version,const char * typ)222 static int oss_get_version (int fd, int *version, const char *typ)
223 {
224 if (ioctl (fd, OSS_GETVERSION, &version)) {
225 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
226 /*
227 * Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
228 * since 7.x, but currently only on the mixer device (or in
229 * the Linuxolator), and in the native version that part of
230 * the code is in fact never reached so the ioctl fails anyway.
231 * Until this is fixed, just check the errno and if its what
232 * FreeBSD's sound drivers return atm assume they are new enough.
233 */
234 if (errno == EINVAL) {
235 *version = 0x040000;
236 return 0;
237 }
238 #endif
239 oss_logerr2 (errno, typ, "Failed to get OSS version\n");
240 return -1;
241 }
242 return 0;
243 }
244 #endif
245
oss_open(int in,struct oss_params * req,audsettings * as,struct oss_params * obt,int * pfd,Audiodev * dev)246 static int oss_open(int in, struct oss_params *req, audsettings *as,
247 struct oss_params *obt, int *pfd, Audiodev *dev)
248 {
249 AudiodevOssOptions *oopts = &dev->u.oss;
250 AudiodevOssPerDirectionOptions *opdo = in ? oopts->in : oopts->out;
251 int fd;
252 int oflags = (oopts->has_exclusive && oopts->exclusive) ? O_EXCL : 0;
253 audio_buf_info abinfo;
254 int fmt, freq, nchannels;
255 int setfragment = 1;
256 const char *dspname = opdo->dev ?: "/dev/dsp";
257 const char *typ = in ? "ADC" : "DAC";
258 #ifdef USE_DSP_POLICY
259 int policy = oopts->has_dsp_policy ? oopts->dsp_policy : 5;
260 #endif
261
262 /* Kludge needed to have working mmap on Linux */
263 oflags |= (oopts->has_try_mmap && oopts->try_mmap) ?
264 O_RDWR : (in ? O_RDONLY : O_WRONLY);
265
266 fd = open (dspname, oflags | O_NONBLOCK);
267 if (-1 == fd) {
268 oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
269 return -1;
270 }
271
272 freq = req->freq;
273 nchannels = req->nchannels;
274 fmt = req->fmt;
275 req->nfrags = opdo->has_buffer_count ? opdo->buffer_count : 4;
276 req->fragsize = audio_buffer_bytes(
277 qapi_AudiodevOssPerDirectionOptions_base(opdo), as, 23220);
278
279 if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
280 oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
281 goto err;
282 }
283
284 if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
285 oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
286 req->nchannels);
287 goto err;
288 }
289
290 if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
291 oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
292 goto err;
293 }
294
295 if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) {
296 oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
297 goto err;
298 }
299
300 #ifdef USE_DSP_POLICY
301 if (policy >= 0) {
302 int version;
303
304 if (!oss_get_version (fd, &version, typ)) {
305 trace_oss_version(version);
306
307 if (version >= 0x040000) {
308 int policy2 = policy;
309 if (ioctl(fd, SNDCTL_DSP_POLICY, &policy2)) {
310 oss_logerr2 (errno, typ,
311 "Failed to set timing policy to %d\n",
312 policy);
313 goto err;
314 }
315 setfragment = 0;
316 }
317 }
318 }
319 #endif
320
321 if (setfragment) {
322 int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize);
323 if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
324 oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
325 req->nfrags, req->fragsize);
326 goto err;
327 }
328 }
329
330 if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
331 oss_logerr2 (errno, typ, "Failed to get buffer length\n");
332 goto err;
333 }
334
335 if (!abinfo.fragstotal || !abinfo.fragsize) {
336 AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
337 abinfo.fragstotal, abinfo.fragsize, typ);
338 goto err;
339 }
340
341 obt->fmt = fmt;
342 obt->nchannels = nchannels;
343 obt->freq = freq;
344 obt->nfrags = abinfo.fragstotal;
345 obt->fragsize = abinfo.fragsize;
346 *pfd = fd;
347
348 #ifdef DEBUG_MISMATCHES
349 if ((req->fmt != obt->fmt) ||
350 (req->nchannels != obt->nchannels) ||
351 (req->freq != obt->freq) ||
352 (req->fragsize != obt->fragsize) ||
353 (req->nfrags != obt->nfrags)) {
354 dolog ("Audio parameters mismatch\n");
355 oss_dump_info (req, obt);
356 }
357 #endif
358
359 #ifdef DEBUG
360 oss_dump_info (req, obt);
361 #endif
362 return 0;
363
364 err:
365 oss_anal_close (&fd);
366 return -1;
367 }
368
oss_get_available_bytes(OSSVoiceOut * oss)369 static size_t oss_get_available_bytes(OSSVoiceOut *oss)
370 {
371 int err;
372 struct count_info cntinfo;
373 assert(oss->mmapped);
374
375 err = ioctl(oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
376 if (err < 0) {
377 oss_logerr(errno, "SNDCTL_DSP_GETOPTR failed\n");
378 return 0;
379 }
380
381 return audio_ring_dist(cntinfo.ptr, oss->hw.pos_emul, oss->hw.size_emul);
382 }
383
oss_run_buffer_out(HWVoiceOut * hw)384 static void oss_run_buffer_out(HWVoiceOut *hw)
385 {
386 OSSVoiceOut *oss = (OSSVoiceOut *)hw;
387
388 if (!oss->mmapped) {
389 audio_generic_run_buffer_out(hw);
390 }
391 }
392
oss_buffer_get_free(HWVoiceOut * hw)393 static size_t oss_buffer_get_free(HWVoiceOut *hw)
394 {
395 OSSVoiceOut *oss = (OSSVoiceOut *)hw;
396
397 if (oss->mmapped) {
398 return oss_get_available_bytes(oss);
399 } else {
400 return audio_generic_buffer_get_free(hw);
401 }
402 }
403
oss_get_buffer_out(HWVoiceOut * hw,size_t * size)404 static void *oss_get_buffer_out(HWVoiceOut *hw, size_t *size)
405 {
406 OSSVoiceOut *oss = (OSSVoiceOut *)hw;
407
408 if (oss->mmapped) {
409 *size = hw->size_emul - hw->pos_emul;
410 return hw->buf_emul + hw->pos_emul;
411 } else {
412 return audio_generic_get_buffer_out(hw, size);
413 }
414 }
415
oss_put_buffer_out(HWVoiceOut * hw,void * buf,size_t size)416 static size_t oss_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
417 {
418 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
419 if (oss->mmapped) {
420 assert(buf == hw->buf_emul + hw->pos_emul && size < hw->size_emul);
421
422 hw->pos_emul = (hw->pos_emul + size) % hw->size_emul;
423 return size;
424 } else {
425 return audio_generic_put_buffer_out(hw, buf, size);
426 }
427 }
428
oss_write(HWVoiceOut * hw,void * buf,size_t len)429 static size_t oss_write(HWVoiceOut *hw, void *buf, size_t len)
430 {
431 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
432 size_t pos;
433
434 if (oss->mmapped) {
435 size_t total_len;
436 len = MIN(len, oss_get_available_bytes(oss));
437
438 total_len = len;
439 while (len) {
440 size_t to_copy = MIN(len, hw->size_emul - hw->pos_emul);
441 memcpy(hw->buf_emul + hw->pos_emul, buf, to_copy);
442
443 hw->pos_emul = (hw->pos_emul + to_copy) % hw->size_emul;
444 buf += to_copy;
445 len -= to_copy;
446 }
447 return total_len;
448 }
449
450 pos = 0;
451 while (len) {
452 ssize_t bytes_written;
453 void *pcm = advance(buf, pos);
454
455 bytes_written = write(oss->fd, pcm, len);
456 if (bytes_written < 0) {
457 if (errno != EAGAIN) {
458 oss_logerr(errno, "failed to write %zu bytes\n",
459 len);
460 }
461 return pos;
462 }
463
464 pos += bytes_written;
465 if (bytes_written < len) {
466 break;
467 }
468 len -= bytes_written;
469 }
470 return pos;
471 }
472
oss_fini_out(HWVoiceOut * hw)473 static void oss_fini_out (HWVoiceOut *hw)
474 {
475 int err;
476 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
477
478 ldebug ("oss_fini\n");
479 oss_anal_close (&oss->fd);
480
481 if (oss->mmapped && hw->buf_emul) {
482 err = munmap(hw->buf_emul, hw->size_emul);
483 if (err) {
484 oss_logerr(errno, "Failed to unmap buffer %p, size %zu\n",
485 hw->buf_emul, hw->size_emul);
486 }
487 hw->buf_emul = NULL;
488 }
489 }
490
oss_init_out(HWVoiceOut * hw,struct audsettings * as,void * drv_opaque)491 static int oss_init_out(HWVoiceOut *hw, struct audsettings *as,
492 void *drv_opaque)
493 {
494 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
495 struct oss_params req, obt;
496 int endianness;
497 int err;
498 int fd;
499 AudioFormat effective_fmt;
500 struct audsettings obt_as;
501 Audiodev *dev = drv_opaque;
502 AudiodevOssOptions *oopts = &dev->u.oss;
503
504 oss->fd = -1;
505
506 req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
507 req.freq = as->freq;
508 req.nchannels = as->nchannels;
509
510 if (oss_open(0, &req, as, &obt, &fd, dev)) {
511 return -1;
512 }
513
514 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
515 if (err) {
516 oss_anal_close (&fd);
517 return -1;
518 }
519
520 obt_as.freq = obt.freq;
521 obt_as.nchannels = obt.nchannels;
522 obt_as.fmt = effective_fmt;
523 obt_as.endianness = endianness;
524
525 audio_pcm_init_info (&hw->info, &obt_as);
526 oss->nfrags = obt.nfrags;
527 oss->fragsize = obt.fragsize;
528
529 if (obt.nfrags * obt.fragsize % hw->info.bytes_per_frame) {
530 dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
531 obt.nfrags * obt.fragsize, hw->info.bytes_per_frame);
532 }
533
534 hw->samples = (obt.nfrags * obt.fragsize) / hw->info.bytes_per_frame;
535
536 oss->mmapped = 0;
537 if (oopts->has_try_mmap && oopts->try_mmap) {
538 hw->size_emul = hw->samples * hw->info.bytes_per_frame;
539 hw->buf_emul = mmap(
540 NULL,
541 hw->size_emul,
542 PROT_READ | PROT_WRITE,
543 MAP_SHARED,
544 fd,
545 0
546 );
547 if (hw->buf_emul == MAP_FAILED) {
548 oss_logerr(errno, "Failed to map %zu bytes of DAC\n",
549 hw->size_emul);
550 hw->buf_emul = NULL;
551 } else {
552 int trig = 0;
553 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
554 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
555 } else {
556 trig = PCM_ENABLE_OUTPUT;
557 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
558 oss_logerr (
559 errno,
560 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
561 );
562 } else {
563 oss->mmapped = 1;
564 }
565 }
566
567 if (!oss->mmapped) {
568 err = munmap(hw->buf_emul, hw->size_emul);
569 if (err) {
570 oss_logerr(errno, "Failed to unmap buffer %p size %zu\n",
571 hw->buf_emul, hw->size_emul);
572 }
573 hw->buf_emul = NULL;
574 }
575 }
576 }
577
578 oss->fd = fd;
579 oss->dev = dev;
580 return 0;
581 }
582
oss_enable_out(HWVoiceOut * hw,bool enable)583 static void oss_enable_out(HWVoiceOut *hw, bool enable)
584 {
585 int trig;
586 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
587 AudiodevOssPerDirectionOptions *opdo = oss->dev->u.oss.out;
588
589 if (enable) {
590 hw->poll_mode = opdo->try_poll;
591
592 ldebug("enabling voice\n");
593 if (hw->poll_mode) {
594 oss_poll_out(hw);
595 }
596
597 if (!oss->mmapped) {
598 return;
599 }
600
601 audio_pcm_info_clear_buf(&hw->info, hw->buf_emul, hw->samples);
602 trig = PCM_ENABLE_OUTPUT;
603 if (ioctl(oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
604 oss_logerr(errno,
605 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n");
606 return;
607 }
608 } else {
609 if (hw->poll_mode) {
610 qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
611 hw->poll_mode = 0;
612 }
613
614 if (!oss->mmapped) {
615 return;
616 }
617
618 ldebug ("disabling voice\n");
619 trig = 0;
620 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
621 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
622 return;
623 }
624 }
625 }
626
oss_init_in(HWVoiceIn * hw,struct audsettings * as,void * drv_opaque)627 static int oss_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
628 {
629 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
630 struct oss_params req, obt;
631 int endianness;
632 int err;
633 int fd;
634 AudioFormat effective_fmt;
635 struct audsettings obt_as;
636 Audiodev *dev = drv_opaque;
637
638 oss->fd = -1;
639
640 req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
641 req.freq = as->freq;
642 req.nchannels = as->nchannels;
643 if (oss_open(1, &req, as, &obt, &fd, dev)) {
644 return -1;
645 }
646
647 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
648 if (err) {
649 oss_anal_close (&fd);
650 return -1;
651 }
652
653 obt_as.freq = obt.freq;
654 obt_as.nchannels = obt.nchannels;
655 obt_as.fmt = effective_fmt;
656 obt_as.endianness = endianness;
657
658 audio_pcm_init_info (&hw->info, &obt_as);
659 oss->nfrags = obt.nfrags;
660 oss->fragsize = obt.fragsize;
661
662 if (obt.nfrags * obt.fragsize % hw->info.bytes_per_frame) {
663 dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
664 obt.nfrags * obt.fragsize, hw->info.bytes_per_frame);
665 }
666
667 hw->samples = (obt.nfrags * obt.fragsize) / hw->info.bytes_per_frame;
668
669 oss->fd = fd;
670 oss->dev = dev;
671 return 0;
672 }
673
oss_fini_in(HWVoiceIn * hw)674 static void oss_fini_in (HWVoiceIn *hw)
675 {
676 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
677
678 oss_anal_close (&oss->fd);
679 }
680
oss_read(HWVoiceIn * hw,void * buf,size_t len)681 static size_t oss_read(HWVoiceIn *hw, void *buf, size_t len)
682 {
683 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
684 size_t pos = 0;
685
686 while (len) {
687 ssize_t nread;
688
689 void *dst = advance(buf, pos);
690 nread = read(oss->fd, dst, len);
691
692 if (nread == -1) {
693 switch (errno) {
694 case EINTR:
695 case EAGAIN:
696 break;
697 default:
698 oss_logerr(errno, "Failed to read %zu bytes of audio (to %p)\n",
699 len, dst);
700 break;
701 }
702 break;
703 }
704
705 pos += nread;
706 len -= nread;
707 }
708
709 return pos;
710 }
711
oss_enable_in(HWVoiceIn * hw,bool enable)712 static void oss_enable_in(HWVoiceIn *hw, bool enable)
713 {
714 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
715 AudiodevOssPerDirectionOptions *opdo = oss->dev->u.oss.out;
716
717 if (enable) {
718 hw->poll_mode = opdo->try_poll;
719
720 if (hw->poll_mode) {
721 oss_poll_in(hw);
722 }
723 } else {
724 if (hw->poll_mode) {
725 qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
726 hw->poll_mode = 0;
727 }
728 }
729 }
730
oss_init_per_direction(AudiodevOssPerDirectionOptions * opdo)731 static void oss_init_per_direction(AudiodevOssPerDirectionOptions *opdo)
732 {
733 if (!opdo->has_try_poll) {
734 opdo->try_poll = true;
735 opdo->has_try_poll = true;
736 }
737 }
738
oss_audio_init(Audiodev * dev,Error ** errp)739 static void *oss_audio_init(Audiodev *dev, Error **errp)
740 {
741 AudiodevOssOptions *oopts;
742 assert(dev->driver == AUDIODEV_DRIVER_OSS);
743
744 oopts = &dev->u.oss;
745 oss_init_per_direction(oopts->in);
746 oss_init_per_direction(oopts->out);
747
748 if (access(oopts->in->dev ?: "/dev/dsp", R_OK | W_OK) < 0) {
749 error_setg_errno(errp, errno, "%s not accessible", oopts->in->dev ?: "/dev/dsp");
750 return NULL;
751 }
752 if (access(oopts->out->dev ?: "/dev/dsp", R_OK | W_OK) < 0) {
753 error_setg_errno(errp, errno, "%s not accessible", oopts->out->dev ?: "/dev/dsp");
754 return NULL;
755 }
756 return dev;
757 }
758
oss_audio_fini(void * opaque)759 static void oss_audio_fini (void *opaque)
760 {
761 }
762
763 static struct audio_pcm_ops oss_pcm_ops = {
764 .init_out = oss_init_out,
765 .fini_out = oss_fini_out,
766 .write = oss_write,
767 .buffer_get_free = oss_buffer_get_free,
768 .run_buffer_out = oss_run_buffer_out,
769 .get_buffer_out = oss_get_buffer_out,
770 .put_buffer_out = oss_put_buffer_out,
771 .enable_out = oss_enable_out,
772
773 .init_in = oss_init_in,
774 .fini_in = oss_fini_in,
775 .read = oss_read,
776 .run_buffer_in = audio_generic_run_buffer_in,
777 .enable_in = oss_enable_in
778 };
779
780 static struct audio_driver oss_audio_driver = {
781 .name = "oss",
782 .descr = "OSS http://www.opensound.com",
783 .init = oss_audio_init,
784 .fini = oss_audio_fini,
785 .pcm_ops = &oss_pcm_ops,
786 .max_voices_out = INT_MAX,
787 .max_voices_in = INT_MAX,
788 .voice_size_out = sizeof (OSSVoiceOut),
789 .voice_size_in = sizeof (OSSVoiceIn)
790 };
791
register_audio_oss(void)792 static void register_audio_oss(void)
793 {
794 audio_driver_register(&oss_audio_driver);
795 }
796 type_init(register_audio_oss);
797