Bluetooth: BAP: Add bt_bap_unicast_group_get_info

Add bt_bap_unicast_group_get_info to get information
about a unicast group. In this first iteration the info
struct only contains the sink and source presentation
delay, but the info struct can easily be expanded on
later to contain more.

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

Author: Thalley

include/zephyr/bluetooth/audio/bap.h

@@ -54,6 +54,9 @@ extern "C" {
 /** An invalid Broadcast ID */
 #define BT_BAP_INVALID_BROADCAST_ID 0xFFFFFFFFU
 
+/** Value that represents an unset presentation delay value */
+#define BT_BAP_PD_UNSET 0xFFFFFFFFU
+
 /**
  * @brief Recommended connectable advertising parameters
  *
@@ -1744,6 +1747,33 @@ int bt_bap_unicast_group_foreach_stream(struct bt_bap_unicast_group *unicast_gro
 					bt_bap_unicast_group_foreach_stream_func_t func,
 					void *user_data);
 
+/** Structure holding information of audio stream endpoint */
+struct bt_bap_unicast_group_info {
+	/** Presentation delay for sink ASEs
+	 *
+	 * Will be @ref BT_BAP_PD_UNSET if no sink ASEs have been QoS configured
+	 */
+	uint32_t sink_pd;
+
+	/** Presentation delay for source ASEs
+	 *
+	 * Will be @ref BT_BAP_PD_UNSET if no source ASEs have been QoS configured
+	 */
+	uint32_t source_pd;
+};
+
+/**
+ * @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_bap_unicast_group_get_info(const struct bt_bap_unicast_group *unicast_group,
+				  struct bt_bap_unicast_group_info *info);
+
 /** Unicast Client callback structure */
 struct bt_bap_unicast_client_cb {
 	/**

subsys/bluetooth/audio/bap_endpoint.h

@@ -37,8 +37,6 @@
 #define BROADCAST_STREAM_CNT 0
 #endif /* CONFIG_BT_BAP_BROADCAST_SOURCE */
 
-#define BT_BAP_PD_UNSET 0xFFFFFFFFU /* Valid value range uses 24 bits, but is stored in 32 */
-
 /* Temp struct declarations to handle circular dependencies */
 struct bt_bap_unicast_group;
 struct bt_bap_broadcast_source;

subsys/bluetooth/audio/bap_unicast_client.c

@@ -3252,6 +3252,25 @@ int bt_bap_unicast_group_foreach_stream(struct bt_bap_unicast_group *unicast_gro
 	return 0;
 }
 
+int bt_bap_unicast_group_get_info(const struct bt_bap_unicast_group *unicast_group,
+				  struct bt_bap_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->sink_pd = unicast_group->sink_pd;
+	info->source_pd = unicast_group->source_pd;
+
+	return 0;
+}
+
 int bt_bap_unicast_client_config(struct bt_bap_stream *stream,
 				 const struct bt_audio_codec_cfg *codec_cfg)
 {