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/* $OpenBSD: dev_sun.c,v 1.4 2008/06/03 14:36:20 drahn Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "conf.h"
#include "aparams.h"
#include "dev.h"
/*
* convert sun device parameters to struct params
*/
int
sun_infotopar(struct audio_prinfo *ai, struct aparams *par)
{
par->rate = ai->sample_rate;
par->bps = ai->precision / 8;
par->bits = ai->precision;
par->cmax = par->cmin + ai->channels - 1;
if (par->cmax >= CHAN_MAX) {
warnx("%u:%u: channel range out of bounds",
par->cmin, par->cmax);
return 0;
}
par->msb = 1;
switch (ai->encoding) {
case AUDIO_ENCODING_SLINEAR_LE:
par->le = 1;
par->sig = 1;
break;
case AUDIO_ENCODING_SLINEAR_BE:
par->le = 0;
par->sig = 1;
break;
case AUDIO_ENCODING_ULINEAR_LE:
par->le = 1;
par->sig = 0;
break;
case AUDIO_ENCODING_ULINEAR_BE:
par->le = 0;
par->sig = 0;
break;
case AUDIO_ENCODING_SLINEAR:
par->le = NATIVE_LE;
par->sig = 1;
break;
case AUDIO_ENCODING_ULINEAR:
par->le = NATIVE_LE;
par->sig = 0;
break;
default:
warnx("only linear encodings are supported for audio devices");
return 0;
}
return 1;
}
/*
* Convert struct params to sun device parameters.
*/
void
sun_partoinfo(struct audio_prinfo *ai, struct aparams *par)
{
ai->sample_rate = par->rate;
ai->precision = par->bps * 8;
ai->channels = par->cmax - par->cmin + 1;
if (par->le && par->sig) {
ai->encoding = AUDIO_ENCODING_SLINEAR_LE;
} else if (!par->le && par->sig) {
ai->encoding = AUDIO_ENCODING_SLINEAR_BE;
} else if (par->le && !par->sig) {
ai->encoding = AUDIO_ENCODING_ULINEAR_LE;
} else {
ai->encoding = AUDIO_ENCODING_ULINEAR_BE;
}
}
/*
* Open the device and pause it, so later play and record
* can be started simultaneously.
*
* int "infr" and "onfd" we return the input and the output
* block sizes respectively.
*/
int
dev_init(char *path, struct aparams *ipar, struct aparams *opar,
unsigned *infr, unsigned *onfr)
{
int fd;
int fullduplex;
int flags;
struct audio_info aui;
struct audio_bufinfo aubi;
if (!ipar && !opar)
errx(1, "%s: must at least play or record", path);
if (ipar && opar) {
flags = O_RDWR;
} else if (ipar) {
flags = O_RDONLY;
} else {
flags = O_WRONLY;
}
fd = open(path, flags | O_NONBLOCK);
if (fd < 0) {
warn("%s", path);
return -1;
}
/*
* If both play and record are requested then
* set full duplex mode.
*/
if (ipar && opar) {
fullduplex = 1;
if (ioctl(fd, AUDIO_SETFD, &fullduplex) < 0) {
warn("%s: can't set full-duplex", path);
close(fd);
return -1;
}
}
/*
* Set parameters and pause the device. When paused, the write(2)
* syscall will queue samples but the the kernel will not start playing
* them. Setting the 'mode' and pausing the device must be done in a
* single ioctl() call, otherwise the sun driver will start the device
* and fill the record buffers.
*/
AUDIO_INITINFO(&aui);
aui.mode = 0;
if (opar) {
sun_partoinfo(&aui.play, opar);
aui.play.pause = 1;
aui.mode |= AUMODE_PLAY;
}
if (ipar) {
sun_partoinfo(&aui.record, ipar);
aui.record.pause = 1;
aui.mode |= AUMODE_RECORD;
}
if (ioctl(fd, AUDIO_SETINFO, &aui) < 0) {
fprintf(stderr, "%s: can't set audio params to ", path);
if (ipar)
aparams_print(ipar);
if (opar) {
if (ipar)
fprintf(stderr, " and ");
aparams_print(opar);
}
fprintf(stderr, ": %s\n", strerror(errno));
close(fd);
return -1;
}
if (ioctl(fd, AUDIO_GETINFO, &aui) < 0) {
warn("dev_init: getinfo");
close(fd);
return -1;
}
if (opar) {
if (!sun_infotopar(&aui.play, opar)) {
close(fd);
return -1;
}
if (ioctl(fd, AUDIO_GETPRINFO, &aubi) < 0) {
warn("%s: AUDIO_GETPRINFO", path);
close(fd);
return -1;
}
*onfr = aubi.blksize * aubi.hiwat /
(aui.play.channels * aui.play.precision / 8);
}
if (ipar) {
if (!sun_infotopar(&aui.record, ipar)) {
close(fd);
return -1;
}
if (ioctl(fd, AUDIO_GETRRINFO, &aubi) < 0) {
warn("%s: AUDIO_GETRRINFO", path);
close(fd);
return -1;
}
*infr = aubi.blksize * aubi.hiwat /
(aui.record.channels * aui.record.precision / 8);
}
return fd;
}
void
dev_done(int fd)
{
close(fd);
DPRINTF("dev_done: closed\n");
}
/*
* Start play/record.
*/
void
dev_start(int fd)
{
audio_info_t aui;
/*
* Just unpause the device. The kernel will start playback and record
* simultaneously. There must be samples already written.
*/
AUDIO_INITINFO(&aui);
aui.play.pause = aui.record.pause = 0;
if (ioctl(fd, AUDIO_SETINFO, &aui) < 0)
err(1, "dev_start: setinfo");
DPRINTF("dev_start: play/rec started\n");
}
/*
* Stop play/record and clear kernel buffers so that dev_start() can be called
* again.
*/
void
dev_stop(int fd)
{
audio_info_t aui;
unsigned mode;
if (ioctl(fd, AUDIO_DRAIN) < 0)
err(1, "dev_stop: drain");
/*
* The only way to clear kernel buffers and to pause the device
* simultaneously is to set the mode again (to the same value).
*/
if (ioctl(fd, AUDIO_GETINFO, &aui) < 0)
err(1, "dev_stop: getinfo");
mode = aui.mode;
AUDIO_INITINFO(&aui);
aui.mode = mode;
aui.play.pause = aui.record.pause = 1;
if (ioctl(fd, AUDIO_SETINFO, &aui) < 0)
err(1, "dev_stop: setinfo");
DPRINTF("dev_stop: play/rec stopped\n");
}
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