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-rw-r--r--include/tinyalsa/mixer.h28
1 files changed, 15 insertions, 13 deletions
diff --git a/include/tinyalsa/mixer.h b/include/tinyalsa/mixer.h
index 4de6133..a54b5c1 100644
--- a/include/tinyalsa/mixer.h
+++ b/include/tinyalsa/mixer.h
@@ -69,9 +69,11 @@ struct mixer *mixer_open(unsigned int card);
void mixer_close(struct mixer *mixer);
-const char *mixer_get_name(struct mixer *mixer);
+const char *mixer_get_name(const struct mixer *mixer);
-unsigned int mixer_get_num_ctls(struct mixer *mixer);
+unsigned int mixer_get_num_ctls(const struct mixer *mixer);
+
+const struct mixer_ctl *mixer_get_ctl_const(const struct mixer *mixer, unsigned int id);
struct mixer_ctl *mixer_get_ctl(struct mixer *mixer, unsigned int id);
@@ -81,17 +83,17 @@ struct mixer_ctl *mixer_get_ctl_by_name_and_index(struct mixer *mixer,
const char *name,
unsigned int index);
-unsigned int mixer_ctl_get_id(struct mixer_ctl *ctl);
+unsigned int mixer_ctl_get_id(const struct mixer_ctl *ctl);
-const char *mixer_ctl_get_name(struct mixer_ctl *ctl);
+const char *mixer_ctl_get_name(const struct mixer_ctl *ctl);
-enum mixer_ctl_type mixer_ctl_get_type(struct mixer_ctl *ctl);
+enum mixer_ctl_type mixer_ctl_get_type(const struct mixer_ctl *ctl);
-const char *mixer_ctl_get_type_string(struct mixer_ctl *ctl);
+const char *mixer_ctl_get_type_string(const struct mixer_ctl *ctl);
-unsigned int mixer_ctl_get_num_values(struct mixer_ctl *ctl);
+unsigned int mixer_ctl_get_num_values(const struct mixer_ctl *ctl);
-unsigned int mixer_ctl_get_num_enums(struct mixer_ctl *ctl);
+unsigned int mixer_ctl_get_num_enums(const struct mixer_ctl *ctl);
const char *mixer_ctl_get_enum_string(struct mixer_ctl *ctl, unsigned int enum_id);
@@ -102,13 +104,13 @@ const char *mixer_ctl_get_enum_string(struct mixer_ctl *ctl, unsigned int enum_i
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_get_percent(const struct mixer_ctl *ctl, unsigned int id);
int mixer_ctl_set_percent(struct mixer_ctl *ctl, unsigned int id, int percent);
-int mixer_ctl_get_value(struct mixer_ctl *ctl, unsigned int id);
+int mixer_ctl_get_value(const struct mixer_ctl *ctl, unsigned int id);
-int mixer_ctl_get_array(struct mixer_ctl *ctl, void *array, size_t count);
+int mixer_ctl_get_array(const struct mixer_ctl *ctl, void *array, size_t count);
int mixer_ctl_set_value(struct mixer_ctl *ctl, unsigned int id, int value);
@@ -117,9 +119,9 @@ int mixer_ctl_set_array(struct mixer_ctl *ctl, const void *array, size_t count);
int mixer_ctl_set_enum_by_string(struct mixer_ctl *ctl, const char *string);
/* Determe range of integer mixer controls */
-int mixer_ctl_get_range_min(struct mixer_ctl *ctl);
+int mixer_ctl_get_range_min(const struct mixer_ctl *ctl);
-int mixer_ctl_get_range_max(struct mixer_ctl *ctl);
+int mixer_ctl_get_range_max(const struct mixer_ctl *ctl);
#if defined(__cplusplus)
} /* extern "C" */