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>
29 #include <soundcard.h>
31 #include <sys/soundcard.h>
33 #include "qemu-common.h"
36 #define AUDIO_CAP "oss"
37 #include "audio_int.h"
39 typedef struct OSSVoiceOut {
49 typedef struct OSSVoiceIn {
62 const char *devpath_out;
63 const char *devpath_in;
69 .devpath_out = "/dev/dsp",
70 .devpath_in = "/dev/dsp",
82 static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
87 AUD_vlog (AUDIO_CAP, fmt, ap);
90 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
93 static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
102 AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
105 AUD_vlog (AUDIO_CAP, fmt, ap);
108 AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
111 static void oss_anal_close (int *fdp)
113 int err = close (*fdp);
115 oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
120 static int oss_write (SWVoiceOut *sw, void *buf, int len)
122 return audio_pcm_sw_write (sw, buf, len);
125 static int aud_to_ossfmt (audfmt_e fmt)
141 dolog ("Internal logic error: Bad audio format %d\n", fmt);
149 static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness)
183 dolog ("Unrecognized audio format %d\n", ossfmt);
190 #if defined DEBUG_MISMATCHES || defined DEBUG
191 static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
193 dolog ("parameter | requested value | obtained value\n");
194 dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
195 dolog ("channels | %10d | %10d\n",
196 req->nchannels, obt->nchannels);
197 dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
198 dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
199 dolog ("fragsize | %10d | %10d\n",
200 req->fragsize, obt->fragsize);
204 static int oss_open (int in, struct oss_params *req,
205 struct oss_params *obt, int *pfd)
209 audio_buf_info abinfo;
210 int fmt, freq, nchannels;
211 const char *dspname = in ? conf.devpath_in : conf.devpath_out;
212 const char *typ = in ? "ADC" : "DAC";
214 fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | O_NONBLOCK);
216 oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
221 nchannels = req->nchannels;
224 if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
225 oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
229 if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
230 oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
235 if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
236 oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
240 if (ioctl (fd, SNDCTL_DSP_NONBLOCK)) {
241 oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
245 mmmmssss = (req->nfrags << 16) | lsbindex (req->fragsize);
246 if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
247 oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
248 req->nfrags, req->fragsize);
252 if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
253 oss_logerr2 (errno, typ, "Failed to get buffer length\n");
258 obt->nchannels = nchannels;
260 obt->nfrags = abinfo.fragstotal;
261 obt->fragsize = abinfo.fragsize;
264 #ifdef DEBUG_MISMATCHES
265 if ((req->fmt != obt->fmt) ||
266 (req->nchannels != obt->nchannels) ||
267 (req->freq != obt->freq) ||
268 (req->fragsize != obt->fragsize) ||
269 (req->nfrags != obt->nfrags)) {
270 dolog ("Audio parameters mismatch\n");
271 oss_dump_info (req, obt);
276 oss_dump_info (req, obt);
281 oss_anal_close (&fd);
285 static int oss_run_out (HWVoiceOut *hw)
287 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
288 int err, rpos, live, decr;
292 struct audio_buf_info abinfo;
293 struct count_info cntinfo;
296 live = audio_pcm_hw_get_live_out (hw);
301 bufsize = hw->samples << hw->info.shift;
306 err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
308 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
312 if (cntinfo.ptr == oss->old_optr) {
313 if (abs (hw->samples - live) < 64) {
314 dolog ("warning: Overrun\n");
319 if (cntinfo.ptr > oss->old_optr) {
320 bytes = cntinfo.ptr - oss->old_optr;
323 bytes = bufsize + cntinfo.ptr - oss->old_optr;
326 decr = audio_MIN (bytes >> hw->info.shift, live);
329 err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
331 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
335 if (abinfo.bytes > bufsize) {
337 dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
338 "please report your OS/audio hw to malc@pulsesoft.com\n",
339 abinfo.bytes, bufsize);
341 abinfo.bytes = bufsize;
344 if (abinfo.bytes < 0) {
346 dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
347 abinfo.bytes, bufsize);
352 decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
361 int left_till_end_samples = hw->samples - rpos;
362 int convert_samples = audio_MIN (samples, left_till_end_samples);
364 src = hw->mix_buf + rpos;
365 dst = advance (oss->pcm_buf, rpos << hw->info.shift);
367 hw->clip (dst, src, convert_samples);
371 written = write (oss->fd, dst, convert_samples << hw->info.shift);
372 /* XXX: follow errno recommendations ? */
376 "Failed to write %d bytes of audio data from %p\n",
377 convert_samples << hw->info.shift,
383 if (written != convert_samples << hw->info.shift) {
384 int wsamples = written >> hw->info.shift;
385 int wbytes = wsamples << hw->info.shift;
386 if (wbytes != written) {
387 dolog ("warning: Misaligned write %d (requested %d), "
389 wbytes, written, hw->info.align + 1);
392 rpos = (rpos + wsamples) % hw->samples;
397 rpos = (rpos + convert_samples) % hw->samples;
398 samples -= convert_samples;
401 oss->old_optr = cntinfo.ptr;
408 static void oss_fini_out (HWVoiceOut *hw)
411 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
413 ldebug ("oss_fini\n");
414 oss_anal_close (&oss->fd);
418 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
420 oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
421 oss->pcm_buf, hw->samples << hw->info.shift);
425 qemu_free (oss->pcm_buf);
431 static int oss_init_out (HWVoiceOut *hw, audsettings_t *as)
433 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
434 struct oss_params req, obt;
438 audfmt_e effective_fmt;
439 audsettings_t obt_as;
443 req.fmt = aud_to_ossfmt (as->fmt);
445 req.nchannels = as->nchannels;
446 req.fragsize = conf.fragsize;
447 req.nfrags = conf.nfrags;
449 if (oss_open (0, &req, &obt, &fd)) {
453 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
455 oss_anal_close (&fd);
459 obt_as.freq = obt.freq;
460 obt_as.nchannels = obt.nchannels;
461 obt_as.fmt = effective_fmt;
462 obt_as.endianness = endianness;
464 audio_pcm_init_info (&hw->info, &obt_as);
465 oss->nfrags = obt.nfrags;
466 oss->fragsize = obt.fragsize;
468 if (obt.nfrags * obt.fragsize & hw->info.align) {
469 dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
470 obt.nfrags * obt.fragsize, hw->info.align + 1);
473 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
477 oss->pcm_buf = mmap (
479 hw->samples << hw->info.shift,
480 PROT_READ | PROT_WRITE,
485 if (oss->pcm_buf == MAP_FAILED) {
486 oss_logerr (errno, "Failed to map %d bytes of DAC\n",
487 hw->samples << hw->info.shift);
491 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
492 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
495 trig = PCM_ENABLE_OUTPUT;
496 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
499 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
508 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
510 oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
511 oss->pcm_buf, hw->samples << hw->info.shift);
518 oss->pcm_buf = audio_calloc (
525 "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
529 oss_anal_close (&fd);
538 static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
541 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
549 ldebug ("enabling voice\n");
550 audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
551 trig = PCM_ENABLE_OUTPUT;
552 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
555 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
562 ldebug ("disabling voice\n");
564 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
565 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
573 static int oss_init_in (HWVoiceIn *hw, audsettings_t *as)
575 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
576 struct oss_params req, obt;
580 audfmt_e effective_fmt;
581 audsettings_t obt_as;
585 req.fmt = aud_to_ossfmt (as->fmt);
587 req.nchannels = as->nchannels;
588 req.fragsize = conf.fragsize;
589 req.nfrags = conf.nfrags;
590 if (oss_open (1, &req, &obt, &fd)) {
594 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
596 oss_anal_close (&fd);
600 obt_as.freq = obt.freq;
601 obt_as.nchannels = obt.nchannels;
602 obt_as.fmt = effective_fmt;
603 obt_as.endianness = endianness;
605 audio_pcm_init_info (&hw->info, &obt_as);
606 oss->nfrags = obt.nfrags;
607 oss->fragsize = obt.fragsize;
609 if (obt.nfrags * obt.fragsize & hw->info.align) {
610 dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
611 obt.nfrags * obt.fragsize, hw->info.align + 1);
614 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
615 oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
617 dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
618 hw->samples, 1 << hw->info.shift);
619 oss_anal_close (&fd);
627 static void oss_fini_in (HWVoiceIn *hw)
629 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
631 oss_anal_close (&oss->fd);
634 qemu_free (oss->pcm_buf);
639 static int oss_run_in (HWVoiceIn *hw)
641 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
642 int hwshift = hw->info.shift;
644 int live = audio_pcm_hw_get_live_in (hw);
645 int dead = hw->samples - live;
646 size_t read_samples = 0;
659 if (hw->wpos + dead > hw->samples) {
660 bufs[0].len = (hw->samples - hw->wpos) << hwshift;
661 bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
664 bufs[0].len = dead << hwshift;
668 for (i = 0; i < 2; ++i) {
672 void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
673 nread = read (oss->fd, p, bufs[i].len);
676 if (nread & hw->info.align) {
677 dolog ("warning: Misaligned read %zd (requested %d), "
678 "alignment %d\n", nread, bufs[i].add << hwshift,
681 read_samples += nread >> hwshift;
682 hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
686 if (bufs[i].len - nread) {
695 "Failed to read %d bytes of audio (to %p)\n",
706 hw->wpos = (hw->wpos + read_samples) % hw->samples;
710 static int oss_read (SWVoiceIn *sw, void *buf, int size)
712 return audio_pcm_sw_read (sw, buf, size);
715 static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
722 static void *oss_audio_init (void)
727 static void oss_audio_fini (void *opaque)
732 static struct audio_option oss_options[] = {
733 {"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
734 "Fragment size in bytes", NULL, 0},
735 {"NFRAGS", AUD_OPT_INT, &conf.nfrags,
736 "Number of fragments", NULL, 0},
737 {"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
738 "Try using memory mapped access", NULL, 0},
739 {"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
740 "Path to DAC device", NULL, 0},
741 {"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
742 "Path to ADC device", NULL, 0},
743 {"DEBUG", AUD_OPT_BOOL, &conf.debug,
744 "Turn on some debugging messages", NULL, 0},
745 {NULL, 0, NULL, NULL, NULL, 0}
748 static struct audio_pcm_ops oss_pcm_ops = {
762 struct audio_driver oss_audio_driver = {
763 INIT_FIELD (name = ) "oss",
764 INIT_FIELD (descr = ) "OSS http://www.opensound.com",
765 INIT_FIELD (options = ) oss_options,
766 INIT_FIELD (init = ) oss_audio_init,
767 INIT_FIELD (fini = ) oss_audio_fini,
768 INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
769 INIT_FIELD (can_be_default = ) 1,
770 INIT_FIELD (max_voices_out = ) INT_MAX,
771 INIT_FIELD (max_voices_in = ) INT_MAX,
772 INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
773 INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)