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alsa: rework UCM open

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Use _alibpref to check if a device needs a UCM local config. Mark
the device as such and use this to set the OPEN_UCM property on
the device.
Open the UCM for a card when the device has the property set. Use the
same logic for loading the UCM as the acp code.

See #1251
This commit is contained in:
Wim Taymans 2021-06-02 17:25:21 +02:00
parent 58d0e44664
commit 35e81fbfdc
8 changed files with 61 additions and 18 deletions
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25
spa/plugins/alsa/alsa-pcm.c
View file

@ -21,11 +21,28 @@ int spa_alsa_init(struct state *state)
snd_config_update_free_global();
if (strncmp(state->props.device, "_ucm", 4) == 0 &&
strlen(state->props.device) >= 12 &&
state->props.device[8] == '.') {
if ((err = snd_use_case_mgr_open(&state->ucm, &state->props.device[9])) < 0)
if (state->open_ucm) {
char card_name[64];
snprintf(card_name, sizeof(card_name), "hw:%i", state->card_index);
err = snd_use_case_mgr_open(&state->ucm, card_name);
if (err < 0) {
char *name;
err = snd_card_get_name(state->card_index, &name);
if (err < 0) {
spa_log_error(state->log,
"can't get card name from index %d",
state->card_index);
return err;
}
snprintf(card_name, sizeof(card_name), "%s", name);
free(name);
}
err = snd_use_case_mgr_open(&state->ucm, card_name);
if (err < 0) {
spa_log_error(state->log, "UCM not available for card %s", card_name);
return err;
}
}
return 0;
}