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ucm: add support for device names with colon (':')

Browse source 
The colon identifier means to automatically assign
a device index for this device.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2025-11-18 13:13:20 +01:00
parent 07532ae8a8
commit 48c477569d
1 changed files with 56 additions and 16 deletions
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72
src/ucm/parser.c
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@ -1875,18 +1875,36 @@ static int verb_dev_list_check(struct use_case_verb *verb)
return 0;
}
/*
* Check if a device name is already in use
*/
static int is_device_name_used(struct use_case_verb *verb, const char *name, struct use_case_device *current)
{
struct list_head *pos;
struct use_case_device *device;
list_for_each(pos, &verb->device_list) {
device = list_entry(pos, struct use_case_device, list);
if (device != current && strcmp(device->name, name) == 0)
return 1;
}
return 0;
}
/*
* Normalize device names according to use-case.h specification.
* Device names like "HDMI 1" or "Line 1" should be normalized to "HDMI1" and "Line1".
* When device name contains ':', add index and remove everything after ':' (including).
* If final name is already used, retry with higher index.
* Also updates dev_list members in modifiers and devices to reference the normalized names.
*/
static int verb_normalize_device_names(struct use_case_verb *verb)
static int verb_normalize_device_names(snd_use_case_mgr_t *uc_mgr, struct use_case_verb *verb)
{
struct list_head *pos, *pos2, *pos3;
struct use_case_device *device, *device2;
struct use_case_modifier *modifier;
struct dev_list_node *dlist;
char *orig_name, *norm_name;
char *orig_name, *norm_name, *colon;
char temp[80];
int err, index;
@ -1903,19 +1921,41 @@ static int verb_normalize_device_names(struct use_case_verb *verb)
goto __error;
}
err = parse_device_index(&norm_name, &index);
if (err < 0) {
snd_error(UCM, "cannot parse device name '%s'", device->name);
goto __error;
if (uc_mgr->conf_format < 8)
goto __no_colon;
colon = strchr(norm_name, ':');
if (colon) {
*colon = '\0';
index = 1;
do {
snprintf(temp, sizeof(temp), "%s%d", norm_name, index);
if (!is_device_name_used(verb, temp, device))
break;
index++;
} while (index < 100); /* Safety limit */
if (index >= 100) {
snd_error(UCM, "too many device name conflicts for '%s'", norm_name);
err = -EINVAL;
goto __error;
}
} else {
__no_colon:
err = parse_device_index(&norm_name, &index);
if (err < 0) {
snd_error(UCM, "cannot parse device name '%s'", device->name);
goto __error;
}
if (index <= 0) {
free(orig_name);
free(norm_name);
continue;
}
snprintf(temp, sizeof(temp), "%s%d", norm_name, index);
}
if (index <= 0) {
free(orig_name);
free(norm_name);
continue;
}
snprintf(temp, sizeof(temp), "%s%d", norm_name, index);
free(device->name);
device->name = strdup(temp);
if (device->name == NULL) {
@ -1965,7 +2005,7 @@ __error:
return err;
}
static int verb_device_management(struct use_case_verb *verb)
static int verb_device_management(snd_use_case_mgr_t *uc_mgr, struct use_case_verb *verb)
{
struct list_head *pos;
struct ucm_dev_name *dev;
@ -1996,7 +2036,7 @@ static int verb_device_management(struct use_case_verb *verb)
uc_mgr_free_dev_name_list(&verb->remove_list);
/* normalize device names to remove spaces per use-case.h specification */
err = verb_normalize_device_names(verb);
err = verb_normalize_device_names(uc_mgr, verb);
if (err < 0)
return err;
@ -2230,7 +2270,7 @@ static int parse_verb_config(snd_use_case_mgr_t *uc_mgr,
}
/* do device rename and delete */
err = verb_device_management(verb);
err = verb_device_management(uc_mgr, verb);
if (err < 0) {
snd_error(UCM, "device management error in verb '%s'", verb->name);
return err;