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mixer(3): Add support for controlling mixer mute and volume on feeder channels.

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PR:	258711
Reported by:	jbeich@FreeBSD.org
Differential Revision:	https://reviews.freebsd.org/D31636
Sponsored by:	NVIDIA Networking
This commit is contained in:
Hans Petter Selasky 2021-09-28 09:53:44 +02:00
parent 4a83ca1078
commit 3984400149
1 changed files with 14 additions and 10 deletions
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24
lib/libmixer/mixer.c
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@ -77,13 +77,13 @@ mixer_open(const char *name)
if (name != NULL) {
/* `name` does not start with "/dev/mixer". */
if (strncmp(name, BASEPATH, strlen(BASEPATH)) != 0) {
errno = EINVAL;
goto fail;
m->unit = -1;
} else {
/* `name` is "/dev/mixer" so, we'll use the default unit. */
if (strncmp(name, BASEPATH, strlen(name)) == 0)
goto dunit;
m->unit = strtol(name + strlen(BASEPATH), NULL, 10);
}
/* `name` is "/dev/mixer" so, we'll use the default unit. */
if (strncmp(name, BASEPATH, strlen(name)) == 0)
goto dunit;
m->unit = strtol(name + strlen(BASEPATH), NULL, 10);
(void)strlcpy(m->name, name, sizeof(m->name));
} else {
dunit:
@ -101,9 +101,13 @@ dunit:
/* The unit number _must_ be set before the ioctl. */
m->mi.dev = m->unit;
m->ci.card = m->unit;
if (ioctl(m->fd, SNDCTL_MIXERINFO, &m->mi) < 0 ||
ioctl(m->fd, SNDCTL_CARDINFO, &m->ci) < 0 ||
ioctl(m->fd, SOUND_MIXER_READ_DEVMASK, &m->devmask) < 0 ||
if (ioctl(m->fd, SNDCTL_MIXERINFO, &m->mi) < 0) {
memset(&m->mi, 0, sizeof(m->mi));
strlcpy(m->mi.name, m->name, sizeof(m->mi.name));
}
if (ioctl(m->fd, SNDCTL_CARDINFO, &m->ci) < 0)
memset(&m->ci, 0, sizeof(m->ci));
if (ioctl(m->fd, SOUND_MIXER_READ_DEVMASK, &m->devmask) < 0 ||
ioctl(m->fd, SOUND_MIXER_READ_MUTE, &m->mutemask) < 0 ||
ioctl(m->fd, SOUND_MIXER_READ_RECMASK, &m->recmask) < 0 ||
ioctl(m->fd, SOUND_MIXER_READ_RECSRC, &m->recsrc) < 0)
@ -463,7 +467,7 @@ mixer_get_mode(int unit)
(void)snprintf(buf, sizeof(buf), "dev.pcm.%d.mode", unit);
size = sizeof(unsigned int);
if (sysctlbyname(buf, &mode, &size, NULL, 0) < 0)
return (-1);
return (0);
return (mode);
}