static int config_bool(snd_config_t *n, int doit)
{
const char *str;
long val;
long long lval;
switch (snd_config_get_type(n)) {
case SND_CONFIG_TYPE_INTEGER:
snd_config_get_integer(n, &val);
if (val < 0 || val > 1)
return -1;
return val;
case SND_CONFIG_TYPE_INTEGER64:
snd_config_get_integer64(n, &lval);
if (lval < 0 || lval > 1)
return -1;
return (int) lval;
case SND_CONFIG_TYPE_STRING:
snd_config_get_string(n, &str);
break;
case SND_CONFIG_TYPE_COMPOUND:
if (!force_restore || !doit)
return -1;
n = snd_config_iterator_entry(snd_config_iterator_first(n));
return config_bool(n, doit);
default:
return -1;
}
if (strcmp(str, "on") == 0 || strcmp(str, "true") == 0)
return 1;
if (strcmp(str, "off") == 0 || strcmp(str, "false") == 0)
return 0;
return -1;
}
static int config_integer64(snd_config_t *n, long long *val, int doit)
{
int err = snd_config_get_integer64(n, val);
if (err < 0 && force_restore && doit) {
if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND)
return err;
n = snd_config_iterator_entry(snd_config_iterator_first(n));
return config_integer64(n, val, doit);
}
return err;
}
static int config_enumerated(snd_config_t *n, snd_ctl_t *handle,
snd_ctl_elem_info_t *info, int doit)
{
const char *str;
long val;
long long lval;
unsigned int idx, items;
switch (snd_config_get_type(n)) {
case SND_CONFIG_TYPE_INTEGER:
snd_config_get_integer(n, &val);
return val;
case SND_CONFIG_TYPE_INTEGER64:
snd_config_get_integer64(n, &lval);
return (int) lval;
case SND_CONFIG_TYPE_STRING:
snd_config_get_string(n, &str);
break;
case SND_CONFIG_TYPE_COMPOUND:
if (!force_restore || !doit)
return -1;
n = snd_config_iterator_entry(snd_config_iterator_first(n));
return config_enumerated(n, handle, info, doit);
default:
return -1;
}
items = snd_ctl_elem_info_get_items(info);
for (idx = 0; idx < items; idx++) {
int err;
snd_ctl_elem_info_set_item(info, idx);
err = snd_ctl_elem_info(handle, info);
if (err < 0) {
error("snd_ctl_elem_info: %s", snd_strerror(err));
return err;
}
if (strcmp(str, snd_ctl_elem_info_get_item_name(info)) == 0)
return idx;
}
return -1;
}
/*----------------------------------------------------------------------------
** ALSA_CheckEnvironment
**
** Given an Alsa style configuration node, scan its subitems
** for environment variable names, and use them to find an override,
** if appropriate.
** This is essentially a long and convoluted way of doing:
** getenv("ALSA_CARD")
** getenv("ALSA_CTL_CARD")
** getenv("ALSA_PCM_CARD")
** getenv("ALSA_PCM_DEVICE")
**
** The output value is set with the atoi() of the first environment
** variable found to be set, if any; otherwise, it is left alone
*/
static void ALSA_CheckEnvironment(snd_config_t *node, int *outvalue)
{
snd_config_iterator_t iter;
for (iter = snd_config_iterator_first(node);
iter != snd_config_iterator_end(node);
iter = snd_config_iterator_next(iter))
{
snd_config_t *leaf = snd_config_iterator_entry(iter);
if (snd_config_get_type(leaf) == SND_CONFIG_TYPE_STRING)
{
const char *value;
if (snd_config_get_string(leaf, &value) >= 0)
{
char *p = getenv(value);
if (p)
{
*outvalue = atoi(p);
return;
}
}
}
}
}
