Bluetooth: AVRCP: Add SDP attributes.

This patch add SDP records for both CT and TG role. The SDP attribute would be registered according to the configuration. OBEX and Browsing commands are optional and yet not supported. SDP registration is implemented at AVRCP level to simplify the workload of the upper layer. We assume the App can have limited knowledge on SDP structures. Signed-off-by: Zihao Gao <[email protected]>
zephyrproject-rtos · Jul 10, 2024 · 10d0430 · 10d0430
1 parent 9c12cc5
commit 10d0430
Showing 1 changed file with 160 additions and 0 deletions.
diff --git a/subsys/bluetooth/host/classic/avrcp.c b/subsys/bluetooth/host/classic/avrcp.c
@@ -19,6 +19,7 @@
 #include <zephyr/bluetooth/bluetooth.h>
 #include <zephyr/bluetooth/classic/avctp.h>
 #include <zephyr/bluetooth/classic/avrcp.h>
+#include <zephyr/bluetooth/classic/sdp.h>
 #include <zephyr/bluetooth/l2cap.h>
 
 #include "host/hci_core.h"
@@ -43,6 +44,157 @@ K_MUTEX_DEFINE(avrcp_mutex);
 #define AVRCP_LOCK() k_mutex_lock(&avrcp_mutex, K_FOREVER)
 #define AVRCP_UNLOCK() k_mutex_unlock(&avrcp_mutex)
 
+#if defined(CONFIG_BT_AVRCP_TARGET)
+static struct bt_sdp_attribute avrcp_tg_attrs[] = {
+	BT_SDP_NEW_SERVICE,
+	BT_SDP_LIST(
+		BT_SDP_ATTR_SVCLASS_ID_LIST,
+		BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 3),
+		BT_SDP_DATA_ELEM_LIST(
+		{
+			BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+			BT_SDP_ARRAY_16(BT_SDP_AV_REMOTE_TARGET_SVCLASS)
+		},
+		)
+	),
+	BT_SDP_LIST(
+		BT_SDP_ATTR_PROTO_DESC_LIST,
+		BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 16),
+		BT_SDP_DATA_ELEM_LIST(
+		{
+			BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+			BT_SDP_DATA_ELEM_LIST(
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+				BT_SDP_ARRAY_16(BT_SDP_PROTO_L2CAP)
+			},
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UINT16),
+				BT_SDP_ARRAY_16(BT_UUID_AVCTP_VAL)
+			},
+			)
+		},
+		{
+			BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+			BT_SDP_DATA_ELEM_LIST(
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+				BT_SDP_ARRAY_16(BT_UUID_AVCTP_VAL)
+			},
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UINT16),
+				BT_SDP_ARRAY_16(0X0104u)
+			},
+			)
+		},
+		)
+	),
+	/* C1: Browsing not supported */
+	/* C2: Cover Art not supported */
+	BT_SDP_LIST(
+		BT_SDP_ATTR_PROFILE_DESC_LIST,
+		BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 8),
+		BT_SDP_DATA_ELEM_LIST(
+		{
+			BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+			BT_SDP_DATA_ELEM_LIST(
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+				BT_SDP_ARRAY_16(BT_SDP_AV_REMOTE_SVCLASS)
+			},
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UINT16),
+				BT_SDP_ARRAY_16(0x0106U)
+			},
+			)
+		},
+		)
+	),
+	BT_SDP_SUPPORTED_FEATURES(0x0003U), /* Category 1 & 2 */
+	/* O: Provider Name not presented */
+	BT_SDP_SERVICE_NAME("AVRCP Target"),
+};
+
+static struct bt_sdp_record avrcp_tg_rec = BT_SDP_RECORD(avrcp_tg_attrs);
+#endif /* CONFIG_BT_AVRCP_TARGET */
+
+#if defined(CONFIG_BT_AVRCP_CONTROLLER)
+static struct bt_sdp_attribute avrcp_ct_attrs[] = {
+	BT_SDP_NEW_SERVICE,
+	BT_SDP_LIST(
+		BT_SDP_ATTR_SVCLASS_ID_LIST,
+		BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+		BT_SDP_DATA_ELEM_LIST(
+		{
+			BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+			BT_SDP_ARRAY_16(BT_SDP_AV_REMOTE_SVCLASS)
+		},
+		{
+			BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+			BT_SDP_ARRAY_16(BT_SDP_AV_REMOTE_CONTROLLER_SVCLASS)
+		},
+		)
+	),
+	BT_SDP_LIST(
+		BT_SDP_ATTR_PROTO_DESC_LIST,
+		BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 16),
+		BT_SDP_DATA_ELEM_LIST(
+		{
+			BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+			BT_SDP_DATA_ELEM_LIST(
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+				BT_SDP_ARRAY_16(BT_SDP_PROTO_L2CAP)
+			},
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UINT16),
+				BT_SDP_ARRAY_16(BT_UUID_AVCTP_VAL)
+			},
+			)
+		},
+		{
+			BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+			BT_SDP_DATA_ELEM_LIST(
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+				BT_SDP_ARRAY_16(BT_UUID_AVCTP_VAL)
+			},
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UINT16),
+				BT_SDP_ARRAY_16(0X0104u)
+			},
+			)
+		},
+		)
+	),
+	/* C1: Browsing not supported */
+	BT_SDP_LIST(
+		BT_SDP_ATTR_PROFILE_DESC_LIST,
+		BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 8),
+		BT_SDP_DATA_ELEM_LIST(
+		{
+			BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 6),
+			BT_SDP_DATA_ELEM_LIST(
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UUID16),
+				BT_SDP_ARRAY_16(BT_SDP_AV_REMOTE_SVCLASS)
+			},
+			{
+				BT_SDP_TYPE_SIZE(BT_SDP_UINT16),
+				BT_SDP_ARRAY_16(0x0106U)
+			},
+			)
+		},
+		)
+	),
+	BT_SDP_SUPPORTED_FEATURES(0x0003U), /* Category 1 & 2 */
+	/* O: Provider Name not presented */
+	BT_SDP_SERVICE_NAME("AVRCP Controller"),
+};
+
+static struct bt_sdp_record avrcp_ct_rec = BT_SDP_RECORD(avrcp_ct_attrs);
+#endif /* CONFIG_BT_AVRCP_CONTROLLER */
+
 /* Connections */
 static struct bt_avrcp avrcp_connection[CONFIG_BT_MAX_CONN];
 
@@ -148,6 +300,14 @@ int bt_avrcp_init(void)
 		return err;
 	}
 
+#if defined(CONFIG_BT_AVRCP_TARGET)
+	bt_sdp_register_service(&avrcp_tg_rec);
+#endif /* CONFIG_BT_AVRCP_CONTROLLER */
+
+#if defined(CONFIG_BT_AVRCP_CONTROLLER)
+	bt_sdp_register_service(&avrcp_ct_rec);
+#endif /* CONFIG_BT_AVRCP_CONTROLLER */
+
 	LOG_DBG("AVRCP Initialized successfully.");
 	return 0;
 }