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-rw-r--r--include/tinyalsa/asoundlib.h6
1 files changed, 6 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);