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, NULL)) {
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");
257 if (!abinfo.fragstotal || !abinfo.fragsize) {
258 AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
259 abinfo.fragstotal, abinfo.fragsize, typ);
264 obt->nchannels = nchannels;
266 obt->nfrags = abinfo.fragstotal;
267 obt->fragsize = abinfo.fragsize;
270 #ifdef DEBUG_MISMATCHES
271 if ((req->fmt != obt->fmt) ||
272 (req->nchannels != obt->nchannels) ||
273 (req->freq != obt->freq) ||
274 (req->fragsize != obt->fragsize) ||
275 (req->nfrags != obt->nfrags)) {
276 dolog ("Audio parameters mismatch\n");
277 oss_dump_info (req, obt);
282 oss_dump_info (req, obt);
287 oss_anal_close (&fd);
291 static int oss_run_out (HWVoiceOut *hw)
293 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
294 int err, rpos, live, decr;
297 struct st_sample *src;
298 struct audio_buf_info abinfo;
299 struct count_info cntinfo;
302 live = audio_pcm_hw_get_live_out (hw);
307 bufsize = hw->samples << hw->info.shift;
312 err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
314 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
318 if (cntinfo.ptr == oss->old_optr) {
319 if (abs (hw->samples - live) < 64) {
320 dolog ("warning: Overrun\n");
325 if (cntinfo.ptr > oss->old_optr) {
326 bytes = cntinfo.ptr - oss->old_optr;
329 bytes = bufsize + cntinfo.ptr - oss->old_optr;
332 decr = audio_MIN (bytes >> hw->info.shift, live);
335 err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
337 oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
341 if (abinfo.bytes > bufsize) {
343 dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
345 abinfo.bytes, bufsize);
347 abinfo.bytes = bufsize;
350 if (abinfo.bytes < 0) {
352 dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
353 abinfo.bytes, bufsize);
358 decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
367 int left_till_end_samples = hw->samples - rpos;
368 int convert_samples = audio_MIN (samples, left_till_end_samples);
370 src = hw->mix_buf + rpos;
371 dst = advance (oss->pcm_buf, rpos << hw->info.shift);
373 hw->clip (dst, src, convert_samples);
377 written = write (oss->fd, dst, convert_samples << hw->info.shift);
378 /* XXX: follow errno recommendations ? */
382 "Failed to write %d bytes of audio data from %p\n",
383 convert_samples << hw->info.shift,
389 if (written != convert_samples << hw->info.shift) {
390 int wsamples = written >> hw->info.shift;
391 int wbytes = wsamples << hw->info.shift;
392 if (wbytes != written) {
393 dolog ("warning: Misaligned write %d (requested %d), "
395 wbytes, written, hw->info.align + 1);
398 rpos = (rpos + wsamples) % hw->samples;
403 rpos = (rpos + convert_samples) % hw->samples;
404 samples -= convert_samples;
407 oss->old_optr = cntinfo.ptr;
414 static void oss_fini_out (HWVoiceOut *hw)
417 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
419 ldebug ("oss_fini\n");
420 oss_anal_close (&oss->fd);
424 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
426 oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
427 oss->pcm_buf, hw->samples << hw->info.shift);
431 qemu_free (oss->pcm_buf);
437 static int oss_init_out (HWVoiceOut *hw, struct audsettings *as)
439 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
440 struct oss_params req, obt;
444 audfmt_e effective_fmt;
445 struct audsettings obt_as;
449 req.fmt = aud_to_ossfmt (as->fmt);
451 req.nchannels = as->nchannels;
452 req.fragsize = conf.fragsize;
453 req.nfrags = conf.nfrags;
455 if (oss_open (0, &req, &obt, &fd)) {
459 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
461 oss_anal_close (&fd);
465 obt_as.freq = obt.freq;
466 obt_as.nchannels = obt.nchannels;
467 obt_as.fmt = effective_fmt;
468 obt_as.endianness = endianness;
470 audio_pcm_init_info (&hw->info, &obt_as);
471 oss->nfrags = obt.nfrags;
472 oss->fragsize = obt.fragsize;
474 if (obt.nfrags * obt.fragsize & hw->info.align) {
475 dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
476 obt.nfrags * obt.fragsize, hw->info.align + 1);
479 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
483 oss->pcm_buf = mmap (
485 hw->samples << hw->info.shift,
486 PROT_READ | PROT_WRITE,
491 if (oss->pcm_buf == MAP_FAILED) {
492 oss_logerr (errno, "Failed to map %d bytes of DAC\n",
493 hw->samples << hw->info.shift);
497 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
498 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
501 trig = PCM_ENABLE_OUTPUT;
502 if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
505 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
514 err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
516 oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
517 oss->pcm_buf, hw->samples << hw->info.shift);
524 oss->pcm_buf = audio_calloc (
531 "Could not allocate DAC buffer (%d samples, each %d bytes)\n",
535 oss_anal_close (&fd);
544 static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
547 OSSVoiceOut *oss = (OSSVoiceOut *) hw;
555 ldebug ("enabling voice\n");
556 audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
557 trig = PCM_ENABLE_OUTPUT;
558 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
561 "SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
568 ldebug ("disabling voice\n");
570 if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
571 oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
579 static int oss_init_in (HWVoiceIn *hw, struct audsettings *as)
581 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
582 struct oss_params req, obt;
586 audfmt_e effective_fmt;
587 struct audsettings obt_as;
591 req.fmt = aud_to_ossfmt (as->fmt);
593 req.nchannels = as->nchannels;
594 req.fragsize = conf.fragsize;
595 req.nfrags = conf.nfrags;
596 if (oss_open (1, &req, &obt, &fd)) {
600 err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
602 oss_anal_close (&fd);
606 obt_as.freq = obt.freq;
607 obt_as.nchannels = obt.nchannels;
608 obt_as.fmt = effective_fmt;
609 obt_as.endianness = endianness;
611 audio_pcm_init_info (&hw->info, &obt_as);
612 oss->nfrags = obt.nfrags;
613 oss->fragsize = obt.fragsize;
615 if (obt.nfrags * obt.fragsize & hw->info.align) {
616 dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
617 obt.nfrags * obt.fragsize, hw->info.align + 1);
620 hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
621 oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
623 dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
624 hw->samples, 1 << hw->info.shift);
625 oss_anal_close (&fd);
633 static void oss_fini_in (HWVoiceIn *hw)
635 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
637 oss_anal_close (&oss->fd);
640 qemu_free (oss->pcm_buf);
645 static int oss_run_in (HWVoiceIn *hw)
647 OSSVoiceIn *oss = (OSSVoiceIn *) hw;
648 int hwshift = hw->info.shift;
650 int live = audio_pcm_hw_get_live_in (hw);
651 int dead = hw->samples - live;
652 size_t read_samples = 0;
665 if (hw->wpos + dead > hw->samples) {
666 bufs[0].len = (hw->samples - hw->wpos) << hwshift;
667 bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
670 bufs[0].len = dead << hwshift;
674 for (i = 0; i < 2; ++i) {
678 void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
679 nread = read (oss->fd, p, bufs[i].len);
682 if (nread & hw->info.align) {
683 dolog ("warning: Misaligned read %zd (requested %d), "
684 "alignment %d\n", nread, bufs[i].add << hwshift,
687 read_samples += nread >> hwshift;
688 hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
692 if (bufs[i].len - nread) {
701 "Failed to read %d bytes of audio (to %p)\n",
712 hw->wpos = (hw->wpos + read_samples) % hw->samples;
716 static int oss_read (SWVoiceIn *sw, void *buf, int size)
718 return audio_pcm_sw_read (sw, buf, size);
721 static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
728 static void *oss_audio_init (void)
733 static void oss_audio_fini (void *opaque)
738 static struct audio_option oss_options[] = {
739 {"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
740 "Fragment size in bytes", NULL, 0},
741 {"NFRAGS", AUD_OPT_INT, &conf.nfrags,
742 "Number of fragments", NULL, 0},
743 {"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
744 "Try using memory mapped access", NULL, 0},
745 {"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
746 "Path to DAC device", NULL, 0},
747 {"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
748 "Path to ADC device", NULL, 0},
749 {"DEBUG", AUD_OPT_BOOL, &conf.debug,
750 "Turn on some debugging messages", NULL, 0},
751 {NULL, 0, NULL, NULL, NULL, 0}
754 static struct audio_pcm_ops oss_pcm_ops = {
768 struct audio_driver oss_audio_driver = {
769 INIT_FIELD (name = ) "oss",
770 INIT_FIELD (descr = ) "OSS http://www.opensound.com",
771 INIT_FIELD (options = ) oss_options,
772 INIT_FIELD (init = ) oss_audio_init,
773 INIT_FIELD (fini = ) oss_audio_fini,
774 INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
775 INIT_FIELD (can_be_default = ) 1,
776 INIT_FIELD (max_voices_out = ) INT_MAX,
777 INIT_FIELD (max_voices_in = ) INT_MAX,
778 INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
779 INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)