xref: /src/sys/compat/ossaudio/ossaudio.c

/*	$NetBSD: ossaudio.c,v 1.83 2020/04/19 21:37:00 nia Exp $	*/

/*-
 * Copyright (c) 1997, 2008 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ossaudio.c,v 1.83 2020/04/19 21:37:00 nia Exp $");

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/audioio.h>
#include <sys/midiio.h>
#include <sys/kauth.h>
#include <sys/syscallargs.h>
#include <sys/module.h>

#include <compat/ossaudio/ossaudio.h>
#include <compat/ossaudio/ossaudiovar.h>

MODULE(MODULE_CLASS_EXEC, compat_ossaudio, NULL);

#ifdef AUDIO_DEBUG
#define DPRINTF(x) if (ossdebug) printf x
int ossdebug = 0;
#else
#define DPRINTF(x)
#endif

#define TO_OSSVOL(x)	(((x) * 100 + 127) / 255)
#define FROM_OSSVOL(x)	((((x) > 100 ? 100 : (x)) * 255 + 50) / 100)

#define GETPRINFO(info, name)	\
	(((info)->mode == AUMODE_RECORD) \
	    ? (info)->record.name : (info)->play.name)

static struct audiodevinfo *getdevinfo(file_t *);
static int opaque_to_enum(struct audiodevinfo *di, audio_mixer_name_t *label, int opq);
static int enum_to_ord(struct audiodevinfo *di, int enm);
static int enum_to_mask(struct audiodevinfo *di, int enm);

static void setchannels(file_t *, int, int);
static void setblocksize(file_t *, struct audio_info *);

#ifdef AUDIO_DEBUG
static const char *
compat_ossaudio_getcmd(u_long cmd)
{
	static char buf[64];
	switch (cmd) {
#define _DO(_a) \
	case _a: \
		return # _a;
_DO(OSS_SNDCTL_DSP_RESET)
_DO(OSS_SNDCTL_DSP_SYNC)
_DO(OSS_SNDCTL_DSP_SPEED)
_DO(OSS_SOUND_PCM_READ_RATE)
_DO(OSS_SNDCTL_DSP_STEREO)
_DO(OSS_SNDCTL_DSP_GETBLKSIZE)
_DO(OSS_SNDCTL_DSP_SETFMT)
_DO(OSS_SOUND_PCM_READ_BITS)
_DO(OSS_SNDCTL_DSP_CHANNELS)
_DO(OSS_SOUND_PCM_READ_CHANNELS)
_DO(OSS_SOUND_PCM_WRITE_FILTER)
_DO(OSS_SOUND_PCM_READ_FILTER)
_DO(OSS_SNDCTL_DSP_POST)
_DO(OSS_SNDCTL_DSP_SUBDIVIDE)
_DO(OSS_SNDCTL_DSP_SETFRAGMENT)
_DO(OSS_SNDCTL_DSP_GETFMTS)
_DO(OSS_SNDCTL_DSP_GETOSPACE)
_DO(OSS_SNDCTL_DSP_GETISPACE)
_DO(OSS_SNDCTL_DSP_NONBLOCK)
_DO(OSS_SNDCTL_DSP_GETCAPS)
_DO(OSS_SNDCTL_DSP_GETTRIGGER)
_DO(OSS_SNDCTL_DSP_SETTRIGGER)
_DO(OSS_SNDCTL_DSP_GETIPTR)
_DO(OSS_SNDCTL_DSP_GETOPTR)
_DO(OSS_SNDCTL_DSP_MAPINBUF)
_DO(OSS_SNDCTL_DSP_MAPOUTBUF)
_DO(OSS_SNDCTL_DSP_SETSYNCRO)
_DO(OSS_SNDCTL_DSP_SETDUPLEX)
_DO(OSS_SNDCTL_DSP_GETODELAY)
_DO(OSS_SNDCTL_DSP_PROFILE)
_DO(OSS_SOUND_MIXER_INFO)
_DO(OSS_SOUND_OLD_MIXER_INFO)
_DO(OSS_GET_VERSION)
_DO(OSS_SEQ_RESET)
_DO(OSS_SEQ_SYNC)
_DO(OSS_SYNTH_INFO)
_DO(OSS_SEQ_CTRLRATE)
_DO(OSS_SEQ_GETOUTCOUNT)
_DO(OSS_SEQ_GETINCOUNT)
_DO(OSS_SEQ_PERCMODE)
_DO(OSS_SEQ_TESTMIDI)
_DO(OSS_SEQ_RESETSAMPLES)
_DO(OSS_SEQ_NRSYNTHS)
_DO(OSS_SEQ_NRMIDIS)
#ifdef notyet
_DO(OSS_MIDI_INFO)
#endif
_DO(OSS_SEQ_THRESHOLD)
_DO(OSS_MEMAVL)
_DO(OSS_FM_4OP_ENABLE)
_DO(OSS_SEQ_PANIC)
_DO(OSS_SEQ_OUTOFBAND)
_DO(OSS_SEQ_GETTIME)
_DO(OSS_ID)
_DO(OSS_CONTROL)
_DO(OSS_REMOVESAMPLE)
_DO(OSS_TMR_TIMEBASE)
_DO(OSS_TMR_START)
_DO(OSS_TMR_STOP)
_DO(OSS_TMR_CONTINUE)
_DO(OSS_TMR_TEMPO)
_DO(OSS_TMR_SOURCE)
_DO(OSS_TMR_METRONOME)
_DO(OSS_TMR_SELECT)
#undef _DO
	default:
		(void)snprintf(buf, sizeof(buf), "*0x%lx*", cmd);
		return buf;
	}
}
#endif


static int
compat_ossaudio_modcmd(modcmd_t cmd, void *arg)
{

	switch (cmd) {
	case MODULE_CMD_INIT:
	case MODULE_CMD_FINI:
		return 0;
	default:
		return ENOTTY;
	}
}

int
oss_ioctl_audio(struct lwp *l, const struct oss_sys_ioctl_args *uap, register_t *retval)
{
	/* {
		syscallarg(int) fd;
		syscallarg(u_long) com;
		syscallarg(void *) data;
	} */
	file_t *fp;
	u_long com;
	struct audio_info tmpinfo, hwfmt;
	struct audio_offset tmpoffs;
	struct oss_audio_buf_info bufinfo;
	struct oss_count_info cntinfo;
	struct audio_encoding tmpenc;
	u_int u;
	u_int encoding;
	u_int precision;
	int idat, idata;
	int error = 0;
	int (*ioctlf)(file_t *, u_long, void *);

	if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
		return (EBADF);

	if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
		error = EBADF;
		goto out;
	}

	com = SCARG(uap, com);
	DPRINTF(("%s: com=%s\n", __func__, compat_ossaudio_getcmd(com)));

	retval[0] = 0;

	ioctlf = fp->f_ops->fo_ioctl;
	switch (com) {
	case OSS_SNDCTL_DSP_RESET:
		error = ioctlf(fp, AUDIO_FLUSH, NULL);
		if (error) {
			DPRINTF(("%s: AUDIO_FLUSH %d\n", __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_SYNC:
		error = ioctlf(fp, AUDIO_DRAIN, NULL);
		if (error) {
			DPRINTF(("%s: AUDIO_DRAIN %d\n", __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_POST:
		/* This call is merely advisory, and may be a nop. */
		break;
	case OSS_SNDCTL_DSP_SPEED:
		AUDIO_INITINFO(&tmpinfo);
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SPEED %d\n",
			     __func__, error));
			goto out;
		}
		tmpinfo.play.sample_rate =
		tmpinfo.record.sample_rate = idat;
		DPRINTF(("%s: SNDCTL_DSP_SPEED > %d\n", __func__, idat));
		/*
		 * The default NetBSD behavior if an unsupported sample rate
		 * is set is to return an error code and keep the rate at the
		 * default of 8000 Hz.
		 *
		 * However, the OSS expectation is a sample rate supported by
		 * the hardware is returned if the exact rate could not be set.
		 *
		 * So, if the chosen sample rate is invalid, set and return
		 * the current hardware rate.
		 */
		if (ioctlf(fp, AUDIO_SETINFO, &tmpinfo) != 0) {
			error = ioctlf(fp, AUDIO_GETFORMAT, &hwfmt);
			if (error) {
				DPRINTF(("%s: AUDIO_GETFORMAT %d\n",
				     __func__, error));
				goto out;
			}
			error = ioctlf(fp, AUDIO_GETINFO, &tmpinfo);
			if (error) {
				DPRINTF(("%s: AUDIO_GETINFO %d\n",
				     __func__, error));
				goto out;
			}
			tmpinfo.play.sample_rate =
			tmpinfo.record.sample_rate =
			    (tmpinfo.mode == AUMODE_RECORD) ?
			    hwfmt.record.sample_rate :
			    hwfmt.play.sample_rate;
			error = ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
			if (error) {
				DPRINTF(("%s: SNDCTL_DSP_SPEED %d = %d\n",
				     __func__, idat, error));
				goto out;
			}
		}
		/* FALLTHROUGH */
	case OSS_SOUND_PCM_READ_RATE:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			 __func__, error));
			goto out;
		}
		idat = GETPRINFO(&tmpinfo, sample_rate);
		DPRINTF(("%s: SNDCTL_PCM_READ_RATE < %d\n", __func__, idat));
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SOUND_PCM_READ_RATE %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_STEREO:
		AUDIO_INITINFO(&tmpinfo);
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_STEREO %d\n",
			     __func__, error));
			goto out;
		}
		tmpinfo.play.channels =
		tmpinfo.record.channels = idat ? 2 : 1;
		error = ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_SETINFO %d\n",
			     __func__, error));
			goto out;
		}
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		idat = GETPRINFO(&tmpinfo, channels) - 1;
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_STEREO %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETBLKSIZE:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		setblocksize(fp, &tmpinfo);
		idat = tmpinfo.blocksize;
		DPRINTF(("%s: SNDCTL_DSP_GETBLKSIZE < %d\n",
		     __func__, idat));
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETBLKSIZE %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_SETFMT:
		AUDIO_INITINFO(&tmpinfo);
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SETFMT %d\n",
			     __func__, error));
			goto out;
		}
		switch (idat) {
		case OSS_AFMT_MU_LAW:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 8;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_ULAW;
			break;
		case OSS_AFMT_A_LAW:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 8;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_ALAW;
			break;
		case OSS_AFMT_U8:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 8;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_ULINEAR;
			break;
		case OSS_AFMT_S8:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 8;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_SLINEAR;
			break;
		case OSS_AFMT_S16_LE:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 16;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_SLINEAR_LE;
			break;
		case OSS_AFMT_S16_BE:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 16;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_SLINEAR_BE;
			break;
		case OSS_AFMT_U16_LE:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 16;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_ULINEAR_LE;
			break;
		case OSS_AFMT_U16_BE:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 16;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_ULINEAR_BE;
			break;
		case OSS_AFMT_AC3:
			tmpinfo.play.precision =
			tmpinfo.record.precision = 16;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_AC3;
			break;
		default:
			/*
			 * OSSv4 specifies that if an invalid format is chosen
			 * by an application then a sensible format supported
			 * by the hardware is returned.
			 *
			 * In this case, we pick S16LE since it's reasonably
			 * assumed to be supported by applications.
			 */
			tmpinfo.play.precision =
			tmpinfo.record.precision = 16;
			tmpinfo.play.encoding =
			tmpinfo.record.encoding = AUDIO_ENCODING_SLINEAR_LE;
			break;
		}
		DPRINTF(("%s: SNDCTL_DSP_SETFMT > 0x%x\n",
		    __func__, idat));
		error = ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_SETINFO %d\n",
			     __func__, error));
			goto out;
		}
		/* FALLTHROUGH */
	case OSS_SOUND_PCM_READ_BITS:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		encoding = GETPRINFO(&tmpinfo, encoding);
		precision = GETPRINFO(&tmpinfo, precision);
		switch (encoding) {
		case AUDIO_ENCODING_ULAW:
			idat = OSS_AFMT_MU_LAW;
			break;
		case AUDIO_ENCODING_ALAW:
			idat = OSS_AFMT_A_LAW;
			break;
		case AUDIO_ENCODING_SLINEAR_LE:
			if (precision == 16)
				idat = OSS_AFMT_S16_LE;
			else
				idat = OSS_AFMT_S8;
			break;
		case AUDIO_ENCODING_SLINEAR_BE:
			if (precision == 16)
				idat = OSS_AFMT_S16_BE;
			else
				idat = OSS_AFMT_S8;
			break;
		case AUDIO_ENCODING_ULINEAR_LE:
			if (precision == 16)
				idat = OSS_AFMT_U16_LE;
			else
				idat = OSS_AFMT_U8;
			break;
		case AUDIO_ENCODING_ULINEAR_BE:
			if (precision == 16)
				idat = OSS_AFMT_U16_BE;
			else
				idat = OSS_AFMT_U8;
			break;
		case AUDIO_ENCODING_ADPCM:
			idat = OSS_AFMT_IMA_ADPCM;
			break;
		case AUDIO_ENCODING_AC3:
			idat = OSS_AFMT_AC3;
			break;
		default:
			DPRINTF(("%s: SOUND_PCM_READ_BITS bad encoding %d\n",
			     __func__, tmpinfo.play.encoding));
			error = EINVAL;
			goto out;
		}
		DPRINTF(("%s: SOUND_PCM_READ_BITS < 0x%x\n",
		    __func__, idat));
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SOUND_PCM_READ_BITS %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_CHANNELS:
		AUDIO_INITINFO(&tmpinfo);
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_CHANNELS %d\n",
			     __func__, error));
			goto out;
		}
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		setchannels(fp, tmpinfo.mode, idat);
		/* FALLTHROUGH */
	case OSS_SOUND_PCM_READ_CHANNELS:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		idat = GETPRINFO(&tmpinfo, channels);
		DPRINTF(("%s: SOUND_PCM_READ_CHANNELS < %d\n", __func__, idat));
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SOUND_PCM_READ_CHANNELS %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SOUND_PCM_WRITE_FILTER:
	case OSS_SOUND_PCM_READ_FILTER:
		error = EINVAL; /* XXX unimplemented */
		DPRINTF(("%s: SOUND_PCM_{READ,WRITE}_FILTER filter\n",
		     __func__));
		goto out;
	case OSS_SNDCTL_DSP_SUBDIVIDE:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SUBDIVIDE %d\n",
			     __func__, error));
			goto out;
		}
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		setblocksize(fp, &tmpinfo);
		if (idat == 0)
			idat = tmpinfo.play.buffer_size / tmpinfo.blocksize;
		idat = (tmpinfo.play.buffer_size / idat) & -4;
		AUDIO_INITINFO(&tmpinfo);
		tmpinfo.blocksize = idat;
		error = ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_SETINFO %d\n",
			     __func__, error));
			goto out;
		}
		idat = tmpinfo.play.buffer_size / tmpinfo.blocksize;
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SUBDIVIDE %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_SETFRAGMENT:
		AUDIO_INITINFO(&tmpinfo);
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SETFRAGMENT %d\n",
			     __func__, error));
			goto out;
		}
		if ((idat & 0xffff) < 4 || (idat & 0xffff) > 17) {
			DPRINTF(("%s: SNDCTL_DSP_SETFRAGMENT bad ival%d\n",
			     __func__, idat));
			error = EINVAL;
			goto out;
		}
		tmpinfo.blocksize = 1 << (idat & 0xffff);
		tmpinfo.hiwat = (idat >> 16) & 0x7fff;
		DPRINTF(("%s: SNDCTL_DSP_SETFRAGMENT blksize=%d, "
		    "hiwat=%d\n", __func__, tmpinfo.blocksize, tmpinfo.hiwat));
		if (tmpinfo.hiwat == 0)	/* 0 means set to max */
			tmpinfo.hiwat = 65536;
		error = ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_SETINFO %d\n",
			     __func__, error));
			goto out;
		}
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		u = tmpinfo.blocksize;
		for(idat = 0; u > 1; idat++, u >>= 1)
			;
		idat |= (tmpinfo.hiwat & 0x7fff) << 16;
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SETFRAGMENT  %d = %d\n",
			     __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETFMTS:
		for (idat = 0, tmpenc.index = 0;
		    ioctlf(fp, AUDIO_GETENC, &tmpenc) == 0;
		    tmpenc.index++) {
			switch(tmpenc.encoding) {
			case AUDIO_ENCODING_ULAW:
				idat |= OSS_AFMT_MU_LAW;
				break;
			case AUDIO_ENCODING_ALAW:
				idat |= OSS_AFMT_A_LAW;
				break;
			case AUDIO_ENCODING_SLINEAR:
				idat |= OSS_AFMT_S8;
				break;
			case AUDIO_ENCODING_SLINEAR_LE:
				if (tmpenc.precision == 16)
					idat |= OSS_AFMT_S16_LE;
				else
					idat |= OSS_AFMT_S8;
				break;
			case AUDIO_ENCODING_SLINEAR_BE:
				if (tmpenc.precision == 16)
					idat |= OSS_AFMT_S16_BE;
				else
					idat |= OSS_AFMT_S8;
				break;
			case AUDIO_ENCODING_ULINEAR:
				idat |= OSS_AFMT_U8;
				break;
			case AUDIO_ENCODING_ULINEAR_LE:
				if (tmpenc.precision == 16)
					idat |= OSS_AFMT_U16_LE;
				else
					idat |= OSS_AFMT_U8;
				break;
			case AUDIO_ENCODING_ULINEAR_BE:
				if (tmpenc.precision == 16)
					idat |= OSS_AFMT_U16_BE;
				else
					idat |= OSS_AFMT_U8;
				break;
			case AUDIO_ENCODING_ADPCM:
				idat |= OSS_AFMT_IMA_ADPCM;
				break;
			case AUDIO_ENCODING_AC3:
				idat |= OSS_AFMT_AC3;
				break;
			default:
				DPRINTF(("%s: SNDCTL_DSP_GETFMTS unknown %d\n",
				    __func__, tmpenc.encoding));
				break;
			}
		}
		DPRINTF(("%s: SNDCTL_DSP_GETFMTS < 0x%x\n",
		    __func__, idat));
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETFMTS = %x = %d\n",
			    __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETOSPACE:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		setblocksize(fp, &tmpinfo);
		bufinfo.fragsize = tmpinfo.blocksize;
		bufinfo.fragments = tmpinfo.hiwat -
		    (tmpinfo.play.seek + tmpinfo.blocksize - 1) /
		    tmpinfo.blocksize;
		bufinfo.fragstotal = tmpinfo.hiwat;
		bufinfo.bytes =
		    tmpinfo.hiwat * tmpinfo.blocksize - tmpinfo.play.seek;
		error = copyout(&bufinfo, SCARG(uap, data), sizeof bufinfo);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETOSPACE = %d\n",
			    __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETISPACE:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		setblocksize(fp, &tmpinfo);
		bufinfo.fragsize = tmpinfo.blocksize;
		bufinfo.fragments = tmpinfo.record.seek / tmpinfo.blocksize;
		bufinfo.fragstotal =
		    tmpinfo.record.buffer_size / tmpinfo.blocksize;
		bufinfo.bytes = tmpinfo.record.seek;
		error = copyout(&bufinfo, SCARG(uap, data), sizeof bufinfo);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETISPACE %d %d %d %d = %d\n",
			     __func__, bufinfo.fragsize, bufinfo.fragments,
			     bufinfo.fragstotal, bufinfo.bytes, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_NONBLOCK:
		idat = 1;
		error = ioctlf(fp, FIONBIO, &idat);
		if (error) {
			DPRINTF(("%s: FIONBIO %d\n",
			     __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETCAPS:
		error = ioctlf(fp, AUDIO_GETPROPS, &idata);
		if (error) {
			DPRINTF(("%s: AUDIO_GETPROPS %d\n",
			     __func__, error));
			goto out;
		}
		idat = OSS_DSP_CAP_TRIGGER;
		if (idata & AUDIO_PROP_FULLDUPLEX)
			idat |= OSS_DSP_CAP_DUPLEX;
		if (idata & AUDIO_PROP_MMAP)
			idat |= OSS_DSP_CAP_MMAP;
		DPRINTF(("%s: SNDCL_DSP_GETCAPS %s duplex, %smmap\n",
		     __func__, (idat & OSS_DSP_CAP_DUPLEX) ? "full" : "half",
		     (idat & OSS_DSP_CAP_MMAP) ? "" : "no "));
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETCAPS %x = %d\n", __func__,
			    idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_SETTRIGGER:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_SETTRIGGER: %d\n",
			     __func__, error));
			goto out;
		}
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		AUDIO_INITINFO(&tmpinfo);
		if (tmpinfo.mode & AUMODE_PLAY)
			tmpinfo.play.pause = (idat & OSS_PCM_ENABLE_OUTPUT) == 0;
		if (tmpinfo.mode & AUMODE_RECORD)
			tmpinfo.record.pause = (idat & OSS_PCM_ENABLE_INPUT) == 0;
		(void)ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		/* FALLTHRU */
	case OSS_SNDCTL_DSP_GETTRIGGER:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			     __func__, error));
			goto out;
		}
		idat = 0;
		if ((tmpinfo.mode & AUMODE_PLAY) && !tmpinfo.play.pause)
			idat |= OSS_PCM_ENABLE_OUTPUT;
		if ((tmpinfo.mode & AUMODE_RECORD) && !tmpinfo.record.pause)
			idat |= OSS_PCM_ENABLE_INPUT;
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETTRIGGER = %x = %d\n",
			    __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETIPTR:
		error = ioctlf(fp, AUDIO_GETIOFFS, &tmpoffs);
		if (error) {
			DPRINTF(("%s: AUDIO_GETIOFFS %d\n",
			     __func__, error));
			goto out;
		}
		cntinfo.bytes = tmpoffs.samples;
		cntinfo.blocks = tmpoffs.deltablks;
		cntinfo.ptr = tmpoffs.offset;
		error = copyout(&cntinfo, SCARG(uap, data), sizeof cntinfo);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETIPTR %d\n",
			    __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_GETOPTR:
		error = ioctlf(fp, AUDIO_GETOOFFS, &tmpoffs);
		if (error) {
			DPRINTF(("%s: AUDIO_GETOOFFS %d\n",
			     __func__, error));
			goto out;
		}
		cntinfo.bytes = tmpoffs.samples;
		cntinfo.blocks = tmpoffs.deltablks;
		cntinfo.ptr = tmpoffs.offset;
		error = copyout(&cntinfo, SCARG(uap, data), sizeof cntinfo);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETOPTR %d\n",
			    __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_SETDUPLEX:
		idat = 1;
		error = ioctlf(fp, AUDIO_SETFD, &idat);
		if (error) {
			DPRINTF(("%s: AUDIO_SETFD %d = %d\n",
			    __func__, idat, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_MAPINBUF:
		DPRINTF(("%s: Unimplemented SNDCTL_DSP_MAPINBUF\n",
		    __func__));
		error = EINVAL;
		goto out;
	case OSS_SNDCTL_DSP_MAPOUTBUF:
		DPRINTF(("%s: Unimplemented SNDCTL_DSP_MAPOUTBUF\n",
		    __func__));
		error = EINVAL;
		goto out;
	case OSS_SNDCTL_DSP_SETSYNCRO:
		DPRINTF(("%s: Unimplemented SNDCTL_DSP_GETSYNCHRO\n",
		    __func__));
		error = EINVAL;
		goto out;
	case OSS_SNDCTL_DSP_GETODELAY:
		error = ioctlf(fp, AUDIO_GETBUFINFO, &tmpinfo);
		if (error) {
			DPRINTF(("%s: AUDIO_GETBUFINFO %d\n",
			    __func__, error));
			goto out;
		}
		idat = tmpinfo.play.seek + tmpinfo.blocksize / 2;
		error = copyout(&idat, SCARG(uap, data), sizeof idat);
		if (error) {
			DPRINTF(("%s: SNDCTL_DSP_GETODELAY %d\n",
			    __func__, error));
			goto out;
		}
		break;
	case OSS_SNDCTL_DSP_PROFILE:
		/* This gives just a hint to the driver,
		 * implementing it as a NOP is ok
		 */
		DPRINTF(("%s: SNDCTL_DSP_PROFILE\n", __func__));
		break;
	default:
		DPRINTF(("%s: Unimplemented 0x%lx\n", __func__, com));
		error = EINVAL;
		goto out;
	}

 out:
 	fd_putfile(SCARG(uap, fd));
	return error;
}

/* If the NetBSD mixer device should have more than 32 devices
 * some will not be available to Linux */
#define NETBSD_MAXDEVS 64
struct audiodevinfo {
	int done;
	dev_t dev;
	int16_t devmap[OSS_SOUND_MIXER_NRDEVICES],
	        rdevmap[NETBSD_MAXDEVS];
	char names[NETBSD_MAXDEVS][MAX_AUDIO_DEV_LEN];
	int enum2opaque[NETBSD_MAXDEVS];
        u_long devmask, recmask, stereomask;
	u_long caps, source;
};

static int
opaque_to_enum(struct audiodevinfo *di, audio_mixer_name_t *label, int opq)
{
	int i, o;

	for (i = 0; i < NETBSD_MAXDEVS; i++) {
		o = di->enum2opaque[i];
		if (o == opq)
			break;
		if (o == -1 && label != NULL &&
		    !strncmp(di->names[i], label->name, sizeof di->names[i])) {
			di->enum2opaque[i] = opq;
			break;
		}
	}
	if (i >= NETBSD_MAXDEVS)
		i = -1;
	/*printf("opq_to_enum %s %d -> %d\n", label->name, opq, i);*/
	return (i);
}

static int
enum_to_ord(struct audiodevinfo *di, int enm)
{
	if (enm >= NETBSD_MAXDEVS)
		return (-1);

	/*printf("enum_to_ord %d -> %d\n", enm, di->enum2opaque[enm]);*/
	return (di->enum2opaque[enm]);
}

static int
enum_to_mask(struct audiodevinfo *di, int enm)
{
	int m;
	if (enm >= NETBSD_MAXDEVS)
		return (0);

	m = di->enum2opaque[enm];
	if (m == -1)
		m = 0;
	/*printf("enum_to_mask %d -> %d\n", enm, di->enum2opaque[enm]);*/
	return (m);
}

/*
 * Collect the audio device information to allow faster
 * emulation of the Linux mixer ioctls.  Cache the information
 * to eliminate the overhead of repeating all the ioctls needed
 * to collect the information.
 */
static struct audiodevinfo *
getdevinfo(file_t *fp)
{
	mixer_devinfo_t mi;
	int i, j, e;
	static const struct {
		const char *name;
		int code;
	} *dp, devs[] = {
		{ AudioNmicrophone,	OSS_SOUND_MIXER_MIC },
		{ AudioNline,		OSS_SOUND_MIXER_LINE },
		{ AudioNcd,		OSS_SOUND_MIXER_CD },
		{ AudioNdac,		OSS_SOUND_MIXER_PCM },
		{ AudioNaux,		OSS_SOUND_MIXER_LINE1 },
		{ AudioNrecord,		OSS_SOUND_MIXER_IMIX },
		{ AudioNmaster,		OSS_SOUND_MIXER_VOLUME },
		{ AudioNtreble,		OSS_SOUND_MIXER_TREBLE },
		{ AudioNbass,		OSS_SOUND_MIXER_BASS },
		{ AudioNspeaker,	OSS_SOUND_MIXER_SPEAKER },
/*		{ AudioNheadphone,	?? },*/
		{ AudioNoutput,		OSS_SOUND_MIXER_OGAIN },
		{ AudioNinput,		OSS_SOUND_MIXER_IGAIN },
/*		{ AudioNmaster,		OSS_SOUND_MIXER_SPEAKER },*/
/*		{ AudioNstereo,		?? },*/
/*		{ AudioNmono,		?? },*/
		{ AudioNfmsynth,	OSS_SOUND_MIXER_SYNTH },
/*		{ AudioNwave,		OSS_SOUND_MIXER_PCM },*/
		{ AudioNmidi,		OSS_SOUND_MIXER_SYNTH },
/*		{ AudioNmixerout,	?? },*/
		{ 0, -1 }
	};
	int (*ioctlf)(file_t *, u_long, void *) = fp->f_ops->fo_ioctl;
	struct vnode *vp;
	struct vattr va;
	static struct audiodevinfo devcache;
	struct audiodevinfo *di = &devcache;
	int error, mlen, dlen;

	/*
	 * Figure out what device it is so we can check if the
	 * cached data is valid.
	 */
	vp = fp->f_vnode;
	if (vp->v_type != VCHR)
		return 0;
	vn_lock(vp, LK_SHARED | LK_RETRY);
	error = VOP_GETATTR(vp, &va, kauth_cred_get());
	VOP_UNLOCK(vp);
	if (error)
		return 0;
	if (di->done && di->dev == va.va_rdev)
		return di;

	di->done = 1;
	di->dev = va.va_rdev;
	di->devmask = 0;
	di->recmask = 0;
	di->stereomask = 0;
	di->source = ~0;
	di->caps = 0;
	for(i = 0; i < OSS_SOUND_MIXER_NRDEVICES; i++)
		di->devmap[i] = -1;
	for(i = 0; i < NETBSD_MAXDEVS; i++) {
		di->rdevmap[i] = -1;
		di->names[i][0] = '\0';
		di->enum2opaque[i] = -1;
	}
	for(i = 0; i < NETBSD_MAXDEVS; i++) {
		mi.index = i;
		if (ioctlf(fp, AUDIO_MIXER_DEVINFO, &mi) != 0)
			break;
		switch(mi.type) {
		case AUDIO_MIXER_VALUE:
			for(dp = devs; dp->name; dp++) {
				if (strcmp(dp->name, mi.label.name) == 0)
					break;
				dlen = strlen(dp->name);
				mlen = strlen(mi.label.name);
				if (dlen < mlen
				    && mi.label.name[mlen-dlen-1] == '.'
				    && strcmp(dp->name, mi.label.name + mlen - dlen) == 0)
					break;
			}
			if (dp->code >= 0) {
				di->devmap[dp->code] = i;
				di->rdevmap[i] = dp->code;
				di->devmask |= 1 << dp->code;
				if (mi.un.v.num_channels == 2)
					di->stereomask |= 1 << dp->code;
				strncpy(di->names[i], mi.label.name,
					sizeof di->names[i]);
			}
			break;
		}
	}
	for(i = 0; i < NETBSD_MAXDEVS; i++) {
		mi.index = i;
		if (ioctlf(fp, AUDIO_MIXER_DEVINFO, &mi) != 0)
			break;
		if (strcmp(mi.label.name, AudioNsource) != 0)
			continue;
		di->source = i;
		switch(mi.type) {
		case AUDIO_MIXER_ENUM:
			for(j = 0; j < mi.un.e.num_mem; j++) {
				e = opaque_to_enum(di,
						   &mi.un.e.member[j].label,
						   mi.un.e.member[j].ord);
				if (e >= 0)
					di->recmask |= 1 << di->rdevmap[e];
			}
			di->caps = OSS_SOUND_CAP_EXCL_INPUT;
			break;
		case AUDIO_MIXER_SET:
			for(j = 0; j < mi.un.s.num_mem; j++) {
				e = opaque_to_enum(di,
						   &mi.un.s.member[j].label,
						   mi.un.s.member[j].mask);
				if (e >= 0)
					di->recmask |= 1 << di->rdevmap[e];
			}
			break;
		}
	}
	return di;
}

int
oss_ioctl_mixer(struct lwp *lwp, const struct oss_sys_ioctl_args *uap, register_t *retval)
{
	/* {
		syscallarg(int) fd;
		syscallarg(u_long) com;
		syscallarg(void *) data;
	} */
	file_t *fp;
	u_long com;
	struct audiodevinfo *di;
	mixer_ctrl_t mc;
	struct oss_mixer_info omi;
	struct audio_device adev;
	int idat;
	int i;
	int error;
	int l, r, n, e;
	int (*ioctlf)(file_t *, u_long, void *);

	if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
		return error;

	if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
		error = EBADF;
		goto out;
	}

	com = SCARG(uap, com);
	DPRINTF(("%s: com=%s\n", __func__, compat_ossaudio_getcmd(com)));

	retval[0] = 0;

	di = getdevinfo(fp);
	if (di == 0) {
		error = EINVAL;
		goto out;
	}

	ioctlf = fp->f_ops->fo_ioctl;
	switch (com) {
	case OSS_GET_VERSION:
		idat = OSS_SOUND_VERSION;
		break;
	case OSS_SOUND_MIXER_INFO:
	case OSS_SOUND_OLD_MIXER_INFO:
		error = ioctlf(fp, AUDIO_GETDEV, &adev);
		if (error) {
			DPRINTF(("%s: AUDIO_GETDEV %d\n",
			    __func__, error));
			goto out;
		}
		memset(&omi, 0, sizeof omi);
		omi.modify_counter = 1;
		strncpy(omi.id, adev.name, sizeof omi.id);
		strncpy(omi.name, adev.name, sizeof omi.name);
		error = copyout(&omi, SCARG(uap, data), OSS_IOCTL_SIZE(com));
		if (error) {
			DPRINTF(("%s: OSS_SOUND_MIXER_INFO %d\n",
			    __func__, error));
			goto out;
		}
		break;
	case OSS_SOUND_MIXER_READ_RECSRC:
		if (di->source == (u_long)-1) {
			DPRINTF(("%s: OSS_SOUND_MIXER_READ_RECSRC bad source\n",
			    __func__));
			error = EINVAL;
			goto out;
		}
		mc.dev = di->source;
		if (di->caps & OSS_SOUND_CAP_EXCL_INPUT) {
			mc.type = AUDIO_MIXER_ENUM;
			error = ioctlf(fp, AUDIO_MIXER_READ, &mc);
			if (error) {
				DPRINTF(("%s: AUDIO_MIXER_READ %d\n",
				    __func__, error));
				goto out;
			}
			e = opaque_to_enum(di, NULL, mc.un.ord);
			if (e >= 0)
				idat = 1 << di->rdevmap[e];
		} else {
			mc.type = AUDIO_MIXER_SET;
			error = ioctlf(fp, AUDIO_MIXER_READ, &mc);
			if (error) {
				DPRINTF(("%s: AUDIO_MIXER_READ %d\n",
				    __func__, error));
				goto out;
			}
			e = opaque_to_enum(di, NULL, mc.un.mask);
			if (e >= 0)
				idat = 1 << di->rdevmap[e];
		}
		break;
	case OSS_SOUND_MIXER_READ_DEVMASK:
		idat = di->devmask;
		break;
	case OSS_SOUND_MIXER_READ_RECMASK:
		idat = di->recmask;
		break;
	case OSS_SOUND_MIXER_READ_STEREODEVS:
		idat = di->stereomask;
		break;
	case OSS_SOUND_MIXER_READ_CAPS:
		idat = di->caps;
		break;
	case OSS_SOUND_MIXER_WRITE_RECSRC:
	case OSS_SOUND_MIXER_WRITE_R_RECSRC:
		if (di->source == (u_long)-1) {
			DPRINTF(("%s: OSS_SOUND_MIXER_WRITE_RECSRC bad "
			    "source\n", __func__));
			error = EINVAL;
			goto out;
		}
		mc.dev = di->source;
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error) {
			DPRINTF(("%s: OSS_SOUND_MIXER_WRITE_RECSRC %d\n",
			    __func__, error));
			goto out;
		}
		if (di->caps & OSS_SOUND_CAP_EXCL_INPUT) {
			mc.type = AUDIO_MIXER_ENUM;
			for(i = 0; i < OSS_SOUND_MIXER_NRDEVICES; i++)
				if (idat & (1 << i))
					break;
			if (i >= OSS_SOUND_MIXER_NRDEVICES ||
			    di->devmap[i] == -1) {
				error = EINVAL;
				DPRINTF(("%s: OSS_SOUND_MIXER_WRITE_RECSRC "
				    "bad index %d\n", __func__, i));
				goto out;
			}
			mc.un.ord = enum_to_ord(di, di->devmap[i]);
		} else {
			mc.type = AUDIO_MIXER_SET;
			mc.un.mask = 0;
			for(i = 0; i < OSS_SOUND_MIXER_NRDEVICES; i++) {
				if (idat & (1 << i)) {
					if (di->devmap[i] == -1) {
						DPRINTF(("%s: OSS_SOUND_MIXER_"
						    "WRITE_RECSRC bad devmap "
						    "%d\n", __func__, i));
						error = EINVAL;
						goto out;
					}
					mc.un.mask |= enum_to_mask(di,
					    di->devmap[i]);
				}
			}
		}
		error = ioctlf(fp, AUDIO_MIXER_WRITE, &mc);
		if (error) {
			DPRINTF(("%s: AUDIO_MIXER_WRITE %d\n",
			    __func__, error));
			goto out;
		}
		goto out;
	default:
		if (OSS_MIXER_READ(OSS_SOUND_MIXER_FIRST) <= com &&
		    com < OSS_MIXER_READ(OSS_SOUND_MIXER_NRDEVICES)) {
			n = OSS_GET_DEV(com);
			if (di->devmap[n] == -1) {
				DPRINTF(("%s: 0x%lx bad devmap %d\n",
				    __func__, com, n));
				error = EINVAL;
				goto out;
			}
		    doread:
			mc.dev = di->devmap[n];
			mc.type = AUDIO_MIXER_VALUE;
			mc.un.value.num_channels = di->stereomask &
			    (1 << n) ? 2 : 1;
			error = ioctlf(fp, AUDIO_MIXER_READ, &mc);
			if (error) {
				DPRINTF(("%s: AUDIO_MIXER_READ %d\n",
				    __func__, error));
				goto out;
			}
			if (mc.un.value.num_channels != 2) {
				l = r =
				    mc.un.value.level[AUDIO_MIXER_LEVEL_MONO];
			} else {
				l = mc.un.value.level[AUDIO_MIXER_LEVEL_LEFT];
				r = mc.un.value.level[AUDIO_MIXER_LEVEL_RIGHT];
			}
			idat = TO_OSSVOL(l) | (TO_OSSVOL(r) << 8);
			DPRINTF(("%s: n=%d (dev=%d) l=%d, r=%d, idat=%04x\n",
				 __func__, n, di->devmap[n], l, r, idat));
			break;
		} else if ((OSS_MIXER_WRITE_R(OSS_SOUND_MIXER_FIRST) <= com &&
		    com < OSS_MIXER_WRITE_R(OSS_SOUND_MIXER_NRDEVICES)) ||
		    (OSS_MIXER_WRITE(OSS_SOUND_MIXER_FIRST) <= com &&
		    com < OSS_MIXER_WRITE(OSS_SOUND_MIXER_NRDEVICES))) {
			n = OSS_GET_DEV(com);
			if (di->devmap[n] == -1) {
				DPRINTF(("%s: 0x%lx bad devmap %d\n",
				    __func__, com, n));
				error = EINVAL;
				goto out;
			}
			error = copyin(SCARG(uap, data), &idat, sizeof idat);
			if (error) {
				DPRINTF(("%s: 0x%lx error %d\n",
				    __func__, com, error));
				goto out;
			}
			l = FROM_OSSVOL( idat       & 0xff);
			r = FROM_OSSVOL((idat >> 8) & 0xff);
			mc.dev = di->devmap[n];
			mc.type = AUDIO_MIXER_VALUE;
			if (di->stereomask & (1 << n)) {
				mc.un.value.num_channels = 2;
				mc.un.value.level[AUDIO_MIXER_LEVEL_LEFT] = l;
				mc.un.value.level[AUDIO_MIXER_LEVEL_RIGHT] = r;
			} else {
				mc.un.value.num_channels = 1;
				mc.un.value.level[AUDIO_MIXER_LEVEL_MONO] =
				    (l + r) / 2;
			}
			DPRINTF(("%s: n=%d (dev=%d) l=%d, r=%d, idat=%04x\n",
			     __func__, n, di->devmap[n], l, r, idat));
			error = ioctlf(fp, AUDIO_MIXER_WRITE, &mc);
			if (error) {
				DPRINTF(("%s: AUDIO_MIXER_WRITE %d\n",
				    __func__, error));
				goto out;
			}
			if (OSS_MIXER_WRITE(OSS_SOUND_MIXER_FIRST) <= com &&
			   com < OSS_MIXER_WRITE(OSS_SOUND_MIXER_NRDEVICES)) {
				error = 0;
				goto out;
			}
			goto doread;
		} else {
			DPRINTF(("%s: Unknown mixer ioctl 0x%lx\n", __func__,
			    com));
			error = EINVAL;
			goto out;
		}
	}
	error = copyout(&idat, SCARG(uap, data), sizeof idat);
 out:
 	fd_putfile(SCARG(uap, fd));
	return error;
}

/* Sequencer emulation */
int
oss_ioctl_sequencer(struct lwp *l, const struct oss_sys_ioctl_args *uap, register_t *retval)
{
	/* {
		syscallarg(int) fd;
		syscallarg(u_long) com;
		syscallarg(void *) data;
	} */
	file_t *fp;
	u_long com;
	int idat, idat1;
	struct synth_info si;
	struct oss_synth_info osi;
	struct oss_seq_event_rec oser;
	int error;
	int (*ioctlf)(file_t *, u_long, void *);

	if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
		return (EBADF);

	if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
		error = EBADF;
		goto out;
	}

	com = SCARG(uap, com);
	DPRINTF(("%s: com=%s\n", __func__, compat_ossaudio_getcmd(com)));

	retval[0] = 0;

	ioctlf = fp->f_ops->fo_ioctl;
	switch (com) {
	case OSS_SEQ_RESET:
		error = ioctlf(fp, SEQUENCER_RESET, &idat);
		goto out;
	case OSS_SEQ_SYNC:
		error = ioctlf(fp, SEQUENCER_SYNC, &idat);
		goto out;
	case OSS_SYNTH_INFO:
		error = copyin(SCARG(uap, data), &osi, sizeof osi);
		if (error)
			goto out;
		si.device = osi.device;
		error = ioctlf(fp, SEQUENCER_INFO, &si);
		if (error)
			goto out;
		strncpy(osi.name, si.name, sizeof osi.name);
		osi.device = si.device;
		switch(si.synth_type) {
		case SYNTH_TYPE_FM:
			osi.synth_type = OSS_SYNTH_TYPE_FM; break;
		case SYNTH_TYPE_SAMPLE:
			osi.synth_type = OSS_SYNTH_TYPE_SAMPLE; break;
		case SYNTH_TYPE_MIDI:
			osi.synth_type = OSS_SYNTH_TYPE_MIDI; break;
		default:
			osi.synth_type = 0; break;
		}
		switch(si.synth_subtype) {
		case SYNTH_SUB_FM_TYPE_ADLIB:
			osi.synth_subtype = OSS_FM_TYPE_ADLIB; break;
		case SYNTH_SUB_FM_TYPE_OPL3:
			osi.synth_subtype = OSS_FM_TYPE_OPL3; break;
		case SYNTH_SUB_MIDI_TYPE_MPU401:
			osi.synth_subtype = OSS_MIDI_TYPE_MPU401; break;
		case SYNTH_SUB_SAMPLE_TYPE_BASIC:
			osi.synth_subtype = OSS_SAMPLE_TYPE_BASIC; break;
		default:
			osi.synth_subtype = 0; break;
		}
		osi.perc_mode = 0;
		osi.nr_voices = si.nr_voices;
		osi.nr_drums = 0;
		osi.instr_bank_size = si.instr_bank_size;
		osi.capabilities = 0;
		if (si.capabilities & SYNTH_CAP_OPL3)
			osi.capabilities |= OSS_SYNTH_CAP_OPL3;
		if (si.capabilities & SYNTH_CAP_INPUT)
			osi.capabilities |= OSS_SYNTH_CAP_INPUT;
		error = copyout(&osi, SCARG(uap, data), sizeof osi);
		goto out;
	case OSS_SEQ_CTRLRATE:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_CTRLRATE, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_SEQ_GETOUTCOUNT:
		error = ioctlf(fp, SEQUENCER_GETOUTCOUNT, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_SEQ_GETINCOUNT:
		error = ioctlf(fp, SEQUENCER_GETINCOUNT, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_SEQ_NRSYNTHS:
		error = ioctlf(fp, SEQUENCER_NRSYNTHS, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_SEQ_NRMIDIS:
		error = ioctlf(fp, SEQUENCER_NRMIDIS, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_SEQ_THRESHOLD:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_THRESHOLD, &idat);
		goto out;
	case OSS_MEMAVL:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_MEMAVL, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_SEQ_PANIC:
		error = ioctlf(fp, SEQUENCER_PANIC, &idat);
		goto out;
	case OSS_SEQ_OUTOFBAND:
		error = copyin(SCARG(uap, data), &oser, sizeof oser);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_OUTOFBAND, &oser);
		if (error)
			goto out;
		break;
	case OSS_SEQ_GETTIME:
		error = ioctlf(fp, SEQUENCER_GETTIME, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_TMR_TIMEBASE:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_TMR_TIMEBASE, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_TMR_START:
		error = ioctlf(fp, SEQUENCER_TMR_START, &idat);
		goto out;
	case OSS_TMR_STOP:
		error = ioctlf(fp, SEQUENCER_TMR_STOP, &idat);
		goto out;
	case OSS_TMR_CONTINUE:
		error = ioctlf(fp, SEQUENCER_TMR_CONTINUE, &idat);
		goto out;
	case OSS_TMR_TEMPO:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_TMR_TEMPO, &idat);
		if (error)
			goto out;
		retval[0] = idat;
		break;
	case OSS_TMR_SOURCE:
		error = copyin(SCARG(uap, data), &idat1, sizeof idat);
		if (error)
			goto out;
		idat = 0;
		if (idat1 & OSS_TMR_INTERNAL) idat |= SEQUENCER_TMR_INTERNAL;
		error = ioctlf(fp, SEQUENCER_TMR_SOURCE, &idat);
		if (error)
			goto out;
		idat1 = idat;
		if (idat1 & SEQUENCER_TMR_INTERNAL) idat |= OSS_TMR_INTERNAL;
		retval[0] = idat;
		break;
	case OSS_TMR_METRONOME:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		error = ioctlf(fp, SEQUENCER_TMR_METRONOME, &idat);
		goto out;
	case OSS_TMR_SELECT:
		error = copyin(SCARG(uap, data), &idat, sizeof idat);
		if (error)
			goto out;
		retval[0] = idat;
		error = ioctlf(fp, SEQUENCER_TMR_SELECT, &idat);
		goto out;
	default:
		DPRINTF(("%s: Unknown sequencer command 0x%lx\n", __func__,
		    com));
		error = EINVAL;
		goto out;
	}

	error = copyout(&idat, SCARG(uap, data), sizeof idat);
 out:
	fd_putfile(SCARG(uap, fd));
	return error;
}

/*
 * When AUDIO_SETINFO fails to set a channel count, the application's chosen
 * number is out of range of what the kernel allows.
 *
 * When this happens, we use the current hardware settings. This is just in
 * case an application is abusing SNDCTL_DSP_CHANNELS - OSSv4 always sets and
 * returns a reasonable value, even if it wasn't what the user requested.
 *
 * XXX: If a device is opened for both playback and recording, and supports
 * fewer channels for recording than playback, applications that do both will
 * behave very strangely. OSS doesn't allow for reporting separate channel
 * counts for recording and playback. This could be worked around by always
 * mixing recorded data up to the same number of channels as is being used
 * for playback.
 */
static void
setchannels(file_t *fp, int mode, int nchannels)
{
	struct audio_info tmpinfo, hwfmt;
	int (*ioctlf)(file_t *, u_long, void *);

	ioctlf = fp->f_ops->fo_ioctl;

	if (ioctlf(fp, AUDIO_GETFORMAT, &hwfmt) < 0) {
		hwfmt.record.channels = hwfmt.play.channels = 2;
	}

	if (mode & AUMODE_PLAY) {
		AUDIO_INITINFO(&tmpinfo);
		tmpinfo.play.channels = nchannels;
		if (ioctlf(fp, AUDIO_SETINFO, &tmpinfo) < 0) {
			AUDIO_INITINFO(&tmpinfo);
			tmpinfo.play.channels = hwfmt.play.channels;
			(void)ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		}
	}

	if (mode & AUMODE_RECORD) {
		AUDIO_INITINFO(&tmpinfo);
		tmpinfo.record.channels = nchannels;
		if (ioctlf(fp, AUDIO_SETINFO, &tmpinfo) < 0) {
			AUDIO_INITINFO(&tmpinfo);
			tmpinfo.record.channels = hwfmt.record.channels;
			(void)ioctlf(fp, AUDIO_SETINFO, &tmpinfo);
		}
	}
}

/*
 * Check that the blocksize is a power of 2 as OSS wants.
 * If not, set it to be.
 */
static void
setblocksize(file_t *fp, struct audio_info *info)
{
	struct audio_info set;
	u_int s;

	 if (info->blocksize & (info->blocksize - 1)) {
		for(s = 32; s < info->blocksize; s <<= 1)
			continue;
		AUDIO_INITINFO(&set);
		set.blocksize = s;
		fp->f_ops->fo_ioctl(fp, AUDIO_SETINFO, &set);
		fp->f_ops->fo_ioctl(fp, AUDIO_GETBUFINFO, info);
	}
}