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Implement relative mixer adjustment.

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PR:		46679 (similar functionality)
This commit is contained in:
Matthew N. Dodd 2003-04-09 15:25:52 +00:00
parent acabcf7d83
commit 22baecf2bd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113299
2 changed files with 51 additions and 13 deletions
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22
usr.sbin/mixer/mixer.8
View File

@ -37,19 +37,24 @@
.Nm
.Op Fl f Ar device
.Op Fl s
.Oo
.Oo Ar dev
.Op Ar lvol Ns Op : Ns Ar rvol
.Cm | recsrc |
.Op Oo +|- Ns Oc Ns Ar lvol Ns Op : Ns Oo +|- Oc Ns Ar rvol Oc
.Ar ...
.Nm
.Op Fl f Ar device
.Op Fl s
.Cm recsrc
.Ar ...
.Nm
.Op Fl f Ar device
.Op Fl s
.Sm off
.Eo \&{
.Cm ^ | + | - | =
.Sm on
.Ec \&} Ns Cm rec
.Ar rdev
.Oc
.Ar ...
.Oc
.Sh DESCRIPTION
The
.Nm
@ -87,6 +92,13 @@ arguments may be from 0 - 100. Omitting
.Ar dev
and including only the channel settings will change the main volume level.
.Pp
If the left or right channel settings are prefixed with
.Sq +
or
.Sq -
the value following will be used as a relative adjustment, modifying the
current settings by the amount specified.
.Pp
If the
.Fl s
flag is used, the current mixer values will be displayed in a format suitable

42
usr.sbin/mixer/mixer.c
View File

@ -35,7 +35,9 @@ usage(int devmask, int recmask)
{
int i, n;
printf("usage: mixer [-f device] [-s] [[dev [voll[:volr]] | recsrc | {^|+|-|=}rec recdev] ... ]\n");
printf("usage: mixer [-f device] [-s] [dev [+|-][voll[:[+|-]volr]] ...\n"
" mixer [-f device] [-s] recsrc ...\n"
" mixer [-f device] [-s] {^|+|-|=}rec rdev ... \n");
printf(" devices: ");
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & devmask) {
@ -91,6 +93,8 @@ main(int argc, char *argv[])
int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
int dusage = 0, drecsrc = 0, shortflag = 0;
int l = 0, r = 0, t = 0;
char lstr[5], rstr[5];
int n = 0, lrel = 0, rrel = 0;
char ch;
char *name;
@ -190,7 +194,24 @@ main(int argc, char *argv[])
break;
}
switch(argc > 1 ? sscanf(argv[1], "%d:%d", &l, &r) : t) {
#define issign(c) (((c) == '+') || ((c) == '-'))
if (argc > 1) {
n = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
if (n > 0) {
if (issign(lstr[0]))
lrel = rrel = 1;
l = atoi(lstr);
}
if (n > 1) {
rrel = 0;
if (issign(rstr[0]))
rrel = 1;
r = atoi(rstr);
}
}
switch(argc > 1 ? n : t) {
case 0:
if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
warn("MIXER_READ");
@ -208,6 +229,17 @@ main(int argc, char *argv[])
case 1:
r = l;
case 2:
if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
warn("MIXER_READ");
argc--; argv++;
continue;
}
if (lrel)
l = (bar & 0x7f) + l;
if (rrel)
r = ((bar >> 8) & 0x7f) + r;
if (l < 0)
l = 0;
else if (l > 100)
@ -217,12 +249,6 @@ main(int argc, char *argv[])
else if (r > 100)
r = 100;
if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
warn("MIXER_READ");
argc--; argv++;
continue;
}
printf("Setting the mixer %s from %d:%d to %d:%d.\n",
names[dev], bar & 0x7f, (bar >> 8) & 0x7f, l, r);