2 * QEMU OSS audio driver
4 * Copyright (c) 2003-2005 Vassili Karpov (malc)
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
26 #include <sys/types.h>
27 #include <sys/ioctl.h>
28 #include <sys/soundcard.h>
29 #include "qemu-common.h"
30 #include "qemu/main-loop.h"
31 #include "qemu/host-utils.h"
34 #define AUDIO_CAP "oss"
35 #include "audio_int.h"
37 #if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
38 #define USE_DSP_POLICY
41 typedef struct OSSConf {
45 const char *devpath_out;
46 const char *devpath_in;
52 typedef struct OSSVoiceOut {
64 typedef struct OSSVoiceIn {
81 static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
86 AUD_vlog (AUDIO_CAP, fmt, ap);
89 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
92 static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
101 AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
104 AUD_vlog (AUDIO_CAP, fmt, ap);
107 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
110 static void oss_anal_close (int *fdp)
114 qemu_set_fd_handler (*fdp, NULL, NULL, NULL);
117 oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
122 static void oss_helper_poll_out (void *opaque)
125 audio_run ("oss_poll_out");
128 static void oss_helper_poll_in (void *opaque)
131 audio_run ("oss_poll_in");
134 static void oss_poll_out (HWVoiceOut *hw)
136 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
138 qemu_set_fd_handler (oss->fd, NULL, oss_helper_poll_out, NULL);
141 static void oss_poll_in (HWVoiceIn *hw)
143 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
145 qemu_set_fd_handler (oss->fd, oss_helper_poll_in, NULL, NULL);
148 static int oss_write (SWVoiceOut *sw, void *buf, int len)
150 return audio_pcm_sw_write (sw, buf, len);
153 static int aud_to_ossfmt (audfmt_e fmt, int endianness)
179 dolog ("Internal logic error: Bad audio format %d\n", fmt);
187 static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness)
221 dolog ("Unrecognized audio format %d\n", ossfmt);
228 #if defined DEBUG_MISMATCHES || defined DEBUG
229 static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
231 dolog ("parameter | requested value | obtained value\n");
232 dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
233 dolog ("channels | %10d | %10d\n",
234 req->nchannels, obt->nchannels);
235 dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
236 dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
237 dolog ("fragsize | %10d | %10d\n",
238 req->fragsize, obt->fragsize);
242 #ifdef USE_DSP_POLICY
243 static int oss_get_version (int fd, int *version, const char *typ)
245 if (ioctl (fd, OSS_GETVERSION, &version)) {
246 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
248 * Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
249 * since 7.x, but currently only on the mixer device (or in
250 * the Linuxolator), and in the native version that part of
251 * the code is in fact never reached so the ioctl fails anyway.
252 * Until this is fixed, just check the errno and if its what
253 * FreeBSD's sound drivers return atm assume they are new enough.
255 if (errno == EINVAL) {
260 oss_logerr2 (errno, typ, "Failed to get OSS version\n");
267 static int oss_open (int in, struct oss_params *req,
268 struct oss_params *obt, int *pfd, OSSConf* conf)
271 int oflags = conf->exclusive ? O_EXCL : 0;
272 audio_buf_info abinfo;
273 int fmt, freq, nchannels;
275 const char *dspname = in ? conf->devpath_in : conf->devpath_out;
276 const char *typ = in ? "ADC" : "DAC";
278 /* Kludge needed to have working mmap on Linux */
279 oflags |= conf->try_mmap ? O_RDWR : (in ? O_RDONLY : O_WRONLY);
281 fd = open (dspname, oflags | O_NONBLOCK);
283 oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
288 nchannels = req->nchannels;
291 if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
292 oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
296 if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
297 oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
302 if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
303 oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
307 if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) {
308 oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
312 #ifdef USE_DSP_POLICY
313 if (conf->policy >= 0) {
316 if (!oss_get_version (fd, &version, typ)) {
318 dolog ("OSS version = %#x\n", version);
321 if (version >= 0x040000) {
322 int policy = conf->policy;
323 if (ioctl (fd, SNDCTL_DSP_POLICY, &policy)) {
324 oss_logerr2 (errno, typ,
325 "Failed to set timing policy to %d\n",
336 int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize);
337 if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
338 oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
339 req->nfrags, req->fragsize);
344 if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
345 oss_logerr2 (errno, typ, "Failed to get buffer length\n");
349 if (!abinfo.fragstotal || !abinfo.fragsize) {
350 AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
351 abinfo.fragstotal, abinfo.fragsize, typ);
356 obt->nchannels = nchannels;
358 obt->nfrags = abinfo.fragstotal;
359 obt->fragsize = abinfo.fragsize;
362 #ifdef DEBUG_MISMATCHES
363 if ((req->fmt != obt->fmt) ||
364 (req->nchannels != obt->nchannels) ||
365 (req->freq != obt->freq) ||
366 (req->fragsize != obt->fragsize) ||
367 (req->nfrags != obt->nfrags)) {
368 dolog ("Audio parameters mismatch\n");
369 oss_dump_info (req, obt);
374 oss_dump_info (req, obt);
379 oss_anal_close (&fd);
383 static void oss_write_pending (OSSVoiceOut *oss)
385 HWVoiceOut *hw = &oss->hw;
391 while (oss->pending) {
393 ssize_t bytes_written;
394 int samples_till_end = hw->samples - oss->wpos;
395 int samples_to_write = audio_MIN (oss->pending, samples_till_end);
396 int bytes_to_write = samples_to_write << hw->info.shift;
397 void *pcm = advance (oss->pcm_buf, oss->wpos << hw->info.shift);
399 bytes_written = write (oss->fd, pcm, bytes_to_write);
400 if (bytes_written < 0) {
401 if (errno != EAGAIN) {
402 oss_logerr (errno, "failed to write %d bytes\n",
408 if (bytes_written & hw->info.align) {
409 dolog ("misaligned write asked for %d, but got %zd\n",
410 bytes_to_write, bytes_written);
414 samples_written = bytes_written >> hw->info.shift;
415 oss->pending -= samples_written;
416 oss->wpos = (oss->wpos + samples_written) % hw->samples;
417 if (bytes_written - bytes_to_write) {
423 static int oss_run_out (HWVoiceOut *hw, int live)
425 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
427 struct audio_buf_info abinfo;
428 struct count_info cntinfo;
430 OSSConf *conf = oss->conf;
432 bufsize = hw->samples << hw->info.shift;
437 err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
439 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
443 pos = hw->rpos << hw->info.shift;
444 bytes = audio_ring_dist (cntinfo.ptr, pos, bufsize);
445 decr = audio_MIN (bytes >> hw->info.shift, live);
448 err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
450 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
454 if (abinfo.bytes > bufsize) {
456 dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
457 "please report your OS/audio hw to av1474@comtv.ru\n",
458 abinfo.bytes, bufsize);
460 abinfo.bytes = bufsize;
463 if (abinfo.bytes < 0) {
465 dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
466 abinfo.bytes, bufsize);
471 decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
477 decr = audio_pcm_hw_clip_out (hw, oss->pcm_buf, decr, oss->pending);
478 oss->pending += decr;
479 oss_write_pending (oss);
484 static void oss_fini_out (HWVoiceOut *hw)
487 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
489 ldebug ("oss_fini\n");
490 oss_anal_close (&oss->fd);
494 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
496 oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
497 oss->pcm_buf, hw->samples << hw->info.shift);
501 g_free (oss->pcm_buf);
507 static int oss_init_out(HWVoiceOut *hw, struct audsettings *as,
510 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
511 struct oss_params req, obt;
515 audfmt_e effective_fmt;
516 struct audsettings obt_as;
517 OSSConf *conf = drv_opaque;
521 req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
523 req.nchannels = as->nchannels;
524 req.fragsize = conf->fragsize;
525 req.nfrags = conf->nfrags;
527 if (oss_open (0, &req, &obt, &fd, conf)) {
531 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
533 oss_anal_close (&fd);
537 obt_as.freq = obt.freq;
538 obt_as.nchannels = obt.nchannels;
539 obt_as.fmt = effective_fmt;
540 obt_as.endianness = endianness;
542 audio_pcm_init_info (&hw->info, &obt_as);
543 oss->nfrags = obt.nfrags;
544 oss->fragsize = obt.fragsize;
546 if (obt.nfrags * obt.fragsize & hw->info.align) {
547 dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
548 obt.nfrags * obt.fragsize, hw->info.align + 1);
551 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
554 if (conf->try_mmap) {
555 oss->pcm_buf = mmap (
557 hw->samples << hw->info.shift,
558 PROT_READ | PROT_WRITE,
563 if (oss->pcm_buf == MAP_FAILED) {
564 oss_logerr (errno, "Failed to map %d bytes of DAC\n",
565 hw->samples << hw->info.shift);
570 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
571 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
574 trig = PCM_ENABLE_OUTPUT;
575 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
578 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
587 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
589 oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
590 oss->pcm_buf, hw->samples << hw->info.shift);
597 oss->pcm_buf = audio_calloc (
604 "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
608 oss_anal_close (&fd);
618 static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
621 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
630 poll_mode = va_arg (ap, int);
633 ldebug ("enabling voice\n");
638 hw->poll_mode = poll_mode;
644 audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
645 trig = PCM_ENABLE_OUTPUT;
646 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
649 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
658 qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
666 ldebug ("disabling voice\n");
668 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
669 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
677 static int oss_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
679 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
680 struct oss_params req, obt;
684 audfmt_e effective_fmt;
685 struct audsettings obt_as;
686 OSSConf *conf = drv_opaque;
690 req.fmt = aud_to_ossfmt (as->fmt, as->endianness);
692 req.nchannels = as->nchannels;
693 req.fragsize = conf->fragsize;
694 req.nfrags = conf->nfrags;
695 if (oss_open (1, &req, &obt, &fd, conf)) {
699 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
701 oss_anal_close (&fd);
705 obt_as.freq = obt.freq;
706 obt_as.nchannels = obt.nchannels;
707 obt_as.fmt = effective_fmt;
708 obt_as.endianness = endianness;
710 audio_pcm_init_info (&hw->info, &obt_as);
711 oss->nfrags = obt.nfrags;
712 oss->fragsize = obt.fragsize;
714 if (obt.nfrags * obt.fragsize & hw->info.align) {
715 dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
716 obt.nfrags * obt.fragsize, hw->info.align + 1);
719 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
720 oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
722 dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
723 hw->samples, 1 << hw->info.shift);
724 oss_anal_close (&fd);
733 static void oss_fini_in (HWVoiceIn *hw)
735 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
737 oss_anal_close (&oss->fd);
739 g_free(oss->pcm_buf);
743 static int oss_run_in (HWVoiceIn *hw)
745 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
746 int hwshift = hw->info.shift;
748 int live = audio_pcm_hw_get_live_in (hw);
749 int dead = hw->samples - live;
750 size_t read_samples = 0;
755 { .add = hw->wpos, .len = 0 },
756 { .add = 0, .len = 0 }
763 if (hw->wpos + dead > hw->samples) {
764 bufs[0].len = (hw->samples - hw->wpos) << hwshift;
765 bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
768 bufs[0].len = dead << hwshift;
771 for (i = 0; i < 2; ++i) {
775 void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
776 nread = read (oss->fd, p, bufs[i].len);
779 if (nread & hw->info.align) {
780 dolog ("warning: Misaligned read %zd (requested %d), "
781 "alignment %d\n", nread, bufs[i].add << hwshift,
784 read_samples += nread >> hwshift;
785 hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift);
788 if (bufs[i].len - nread) {
797 "Failed to read %d bytes of audio (to %p)\n",
808 hw->wpos = (hw->wpos + read_samples) % hw->samples;
812 static int oss_read (SWVoiceIn *sw, void *buf, int size)
814 return audio_pcm_sw_read (sw, buf, size);
817 static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
819 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
828 poll_mode = va_arg (ap, int);
835 hw->poll_mode = poll_mode;
842 qemu_set_fd_handler (oss->fd, NULL, NULL, NULL);
849 static OSSConf glob_conf = {
853 .devpath_out = "/dev/dsp",
854 .devpath_in = "/dev/dsp",
860 static void *oss_audio_init (void)
862 OSSConf *conf = g_malloc(sizeof(OSSConf));
865 if (access(conf->devpath_in, R_OK | W_OK) < 0 ||
866 access(conf->devpath_out, R_OK | W_OK) < 0) {
872 static void oss_audio_fini (void *opaque)
877 static struct audio_option oss_options[] = {
881 .valp = &glob_conf.fragsize,
882 .descr = "Fragment size in bytes"
887 .valp = &glob_conf.nfrags,
888 .descr = "Number of fragments"
893 .valp = &glob_conf.try_mmap,
894 .descr = "Try using memory mapped access"
899 .valp = &glob_conf.devpath_out,
900 .descr = "Path to DAC device"
905 .valp = &glob_conf.devpath_in,
906 .descr = "Path to ADC device"
911 .valp = &glob_conf.exclusive,
912 .descr = "Open device in exclusive mode (vmix wont work)"
914 #ifdef USE_DSP_POLICY
918 .valp = &glob_conf.policy,
919 .descr = "Set the timing policy of the device, -1 to use fragment mode",
925 .valp = &glob_conf.debug,
926 .descr = "Turn on some debugging messages"
928 { /* End of list */ }
931 static struct audio_pcm_ops oss_pcm_ops = {
932 .init_out = oss_init_out,
933 .fini_out = oss_fini_out,
934 .run_out = oss_run_out,
936 .ctl_out = oss_ctl_out,
938 .init_in = oss_init_in,
939 .fini_in = oss_fini_in,
940 .run_in = oss_run_in,
945 struct audio_driver oss_audio_driver = {
947 .descr = "OSS http://www.opensound.com",
948 .options = oss_options,
949 .init = oss_audio_init,
950 .fini = oss_audio_fini,
951 .pcm_ops = &oss_pcm_ops,
953 .max_voices_out = INT_MAX,
954 .max_voices_in = INT_MAX,
955 .voice_size_out = sizeof (OSSVoiceOut),
956 .voice_size_in = sizeof (OSSVoiceIn)