Bluetooth: CAP: Add bt_cap_unicast_group_get_info

Add bt_cap_unicast_group_get_info to get information about
a CAP unicast group. For now this just contain the pointer
to the BAP unicast group, which then can be used with
bt_bap_unicast_group_get_info to get information specific
to BAP. The bt_cap_unicast_group_info struct can later be
expanded with any additional information CAP may add.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

include/zephyr/bluetooth/audio/cap.h

@@ -424,6 +424,24 @@ int bt_cap_unicast_group_foreach_stream(struct bt_cap_unicast_group *unicast_gro
 					bt_cap_unicast_group_foreach_stream_func_t func,
 					void *user_data);
 
+/** Structure holding information of audio stream endpoint */
+struct bt_cap_unicast_group_info {
+	/** Pointer to the underlying Basic Audio Profile unicast group */
+	const struct bt_bap_unicast_group *unicast_group;
+};
+
+/**
+ * @brief Return structure holding information of unicast group
+ *
+ * @param unicast_group The unicast group object.
+ * @param info          The structure object to be filled with the info.
+ *
+ * @retval 0 Success
+ * @retval -EINVAL  @p unicast_group or @p info are NULL
+ */
+int bt_cap_unicast_group_get_info(const struct bt_cap_unicast_group *unicast_group,
+				  struct bt_cap_unicast_group_info *info);
+
 /** Stream specific parameters for the bt_cap_initiator_unicast_audio_start() function */
 struct bt_cap_unicast_audio_start_stream_param {
 	/** Coordinated or ad-hoc set member. */

subsys/bluetooth/audio/cap_initiator.c

@@ -1111,6 +1111,24 @@ int bt_cap_unicast_group_foreach_stream(struct bt_cap_unicast_group *unicast_gro
 						   bap_unicast_group_foreach_stream_cb, &data);
 }
 
+int bt_cap_unicast_group_get_info(const struct bt_cap_unicast_group *unicast_group,
+				  struct bt_cap_unicast_group_info *info)
+{
+	if (unicast_group == NULL) {
+		LOG_DBG("unicast_group is NULL");
+		return -EINVAL;
+	}
+
+	if (info == NULL) {
+		LOG_DBG("info is NULL");
+		return -EINVAL;
+	}
+
+	info->unicast_group = unicast_group->bap_unicast_group;
+
+	return 0;
+}
+
 static bool valid_unicast_audio_start_param(const struct bt_cap_unicast_audio_start_param *param)
 {
 	struct bt_bap_unicast_group *unicast_group = NULL;