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ucm: add ${find-card} and ${find-device} substitutions

Browse source 
It may be useful to find a correct card or device through
control API information fields.

Increase the syntax version to 4.

Examples:

  ${find-card:field=name,regex='HDA Intel'}
  ${find-device:type=pcm,field=id,regex='HDMI 1$'}
  ${find-device:ctl=hw:acp,type=pcm,field=id,regex=DMIC}

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2021-02-02 19:26:24 +01:00
parent 00eafe98ee
commit 296b067fc7
3 changed files with 335 additions and 7 deletions
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23
src/ucm/utils.c
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@ -67,13 +67,25 @@ struct ctl_list *uc_mgr_get_master_ctl(snd_use_case_mgr_t *uc_mgr)
return ctl_list;
}
struct ctl_list *uc_mgr_get_ctl_by_card(snd_use_case_mgr_t *uc_mgr, int card)
{
struct ctl_list *ctl_list;
char cname[32];
int err;
sprintf(cname, "hw:%d", card);
err = uc_mgr_open_ctl(uc_mgr, &ctl_list, cname, 1);
if (err < 0)
return NULL;
return ctl_list;
}
struct ctl_list *uc_mgr_get_ctl_by_name(snd_use_case_mgr_t *uc_mgr, const char *name, int idx)
{
struct list_head *pos;
struct ctl_list *ctl_list = NULL;
struct ctl_list *ctl_list;
const char *s;
char cname[32];
int idx2, card, err;
int idx2, card;
idx2 = idx;
list_for_each(pos, &uc_mgr->ctl_list) {
@ -94,9 +106,8 @@ struct ctl_list *uc_mgr_get_ctl_by_name(snd_use_case_mgr_t *uc_mgr, const char *
return NULL;
while (card >= 0) {
sprintf(cname, "hw:%d", card);
err = uc_mgr_open_ctl(uc_mgr, &ctl_list, cname, 1);
if (err < 0)
ctl_list = uc_mgr_get_ctl_by_card(uc_mgr, card);
if (ctl_list == NULL)
continue; /* really? */
s = snd_ctl_card_info_get_name(ctl_list->ctl_info);
if (s && strcmp(s, name) == 0) {