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module/alsa: handle failure(s) to attach to card or find mixer

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This commit is contained in:
Daniel Eklöf 2019-01-19 19:58:02 +01:00
parent fbb6cd47c4
commit cffb007009
1 changed files with 22 additions and 5 deletions
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27
modules/alsa.c
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@ -178,18 +178,32 @@ static int
run(struct module *mod) run(struct module *mod)
{ {
struct private *m = mod->private; struct private *m = mod->private;
int ret = 1;
snd_mixer_t *handle; snd_mixer_t *handle;
snd_mixer_open(&handle, 0); if (snd_mixer_open(&handle, 0) != 0) {
snd_mixer_attach(handle, m->card); LOG_ERR("failed to open handle");
snd_mixer_selem_register(handle, NULL, NULL); return 1;
snd_mixer_load(handle); }
if (snd_mixer_attach(handle, m->card) != 0 ||
snd_mixer_selem_register(handle, NULL, NULL) != 0 ||
snd_mixer_load(handle) != 0)
{
LOG_ERR("failed to attach to card");
goto err;
}
snd_mixer_selem_id_t *sid; snd_mixer_selem_id_t *sid;
snd_mixer_selem_id_alloca(&sid); snd_mixer_selem_id_alloca(&sid);
snd_mixer_selem_id_set_index(sid, 0); snd_mixer_selem_id_set_index(sid, 0);
snd_mixer_selem_id_set_name(sid, m->mixer); snd_mixer_selem_id_set_name(sid, m->mixer);
snd_mixer_elem_t* elem = snd_mixer_find_selem(handle, sid); snd_mixer_elem_t* elem = snd_mixer_find_selem(handle, sid);
if (elem == NULL) {
LOG_ERR("failed to find mixer");
goto err;
}
/* Get available channels */ /* Get available channels */
for (size_t i = 0; i < SND_MIXER_SCHN_LAST; i++) { for (size_t i = 0; i < SND_MIXER_SCHN_LAST; i++) {
@ -243,9 +257,12 @@ run(struct module *mod)
update_state(mod, elem); update_state(mod, elem);
} }
ret = 0;
err:
snd_mixer_close(handle); snd_mixer_close(handle);
snd_config_update_free_global(); snd_config_update_free_global();
return 0; return ret;
} }
static struct module * static struct module *