diff options
| -rw-r--r-- | include/tinyalsa/asoundlib.h | 6 | ||||
| -rw-r--r-- | mixer.c | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h index ddd7a01..525fef7 100644 --- a/include/tinyalsa/asoundlib.h +++ b/include/tinyalsa/asoundlib.h @@ -215,6 +215,12 @@ unsigned int mixer_ctl_get_num_enums(struct mixer_ctl *ctl); const char *mixer_ctl_get_enum_string(struct mixer_ctl *ctl, unsigned int enum_id); +/* Some sound cards update their controls due to external events, + * such as HDMI EDID byte data changing when an HDMI cable is + * connected. This API allows the count of elements to be updated. + */ +void mixer_ctl_update(struct mixer_ctl *ctl); + /* Set and get mixer controls */ int mixer_ctl_get_percent(struct mixer_ctl *ctl, unsigned int id); int mixer_ctl_set_percent(struct mixer_ctl *ctl, unsigned int id, int percent); @@ -195,6 +195,11 @@ struct mixer_ctl *mixer_get_ctl_by_name(struct mixer *mixer, const char *name) return NULL; } +void mixer_ctl_update(struct mixer_ctl *ctl) +{ + ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_INFO, ctl->info); +} + const char *mixer_ctl_get_name(struct mixer_ctl *ctl) { if (!ctl) |