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amixer - Allow to pass enum item string for cset, too

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cset accepts only integer values as indices, so far, but it's a bit
unfriendly.  Now it accepts the item name as a string argument, too.
The index can be given using numbers as fallback.
This commit is contained in:
Takashi Iwai 2007-07-31 17:29:45 +02:00
parent fea8dbf020
commit 4b16370c01
1 changed files with 31 additions and 1 deletions
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32
amixer/amixer.c
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@ -1154,6 +1154,34 @@ static int parse_simple_id(const char *str, snd_mixer_selem_id_t *sid)
return 0;
}
static int get_ctl_enum_item_index(snd_ctl_t *handle, snd_ctl_elem_info_t *info,
char **ptrp)
{
char *ptr = *ptrp;
int items, i, len;
const char *name;
items = snd_ctl_elem_info_get_items(info);
if (items <= 0)
return -1;
for (i = 0; i < items; i++) {
snd_ctl_elem_info_set_item(info, i);
if (snd_ctl_elem_info(handle, info) < 0)
return -1;
name = snd_ctl_elem_info_get_item_name(info);
len = strlen(name);
if (! strncmp(name, ptr, len)) {
if (! ptr[len] || ptr[len] == ',' || ptr[len] == '\n') {
ptr += len;
*ptrp = ptr;
return i;
}
}
}
return -1;
}
static int cset(int argc, char *argv[], int roflag, int keep_handle)
{
int err;
@ -1242,7 +1270,9 @@ static int cset(int argc, char *argv[], int roflag, int keep_handle)
snd_ctl_elem_value_set_integer64(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
tmp = get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1);
tmp = get_ctl_enum_item_index(handle, info, &ptr);
if (tmp < 0)
tmp = get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1);
snd_ctl_elem_value_set_enumerated(control, idx, tmp);
break;
case SND_CTL_ELEM_TYPE_BYTES: