/******************************************************************************
 *
 *  Copyright (c) 2013, The Linux Foundation. All rights reserved.
 *  Not a Contribution.
 *  Copyright (c) 2014 The Android Open Source Project
 *  Copyright (C) 2009-2012 Broadcom Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/************************************************************************************
 *
 *  Filename:      btif_util.c
 *
 *  Description:   Miscellaneous helper functions
 *
 *
 ***********************************************************************************/

#include <hardware/bluetooth.h>
#include <hardware/bt_hf.h>
#include <hardware/bt_av.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>


#define LOG_TAG "bt_btif_util"
#include "btif_common.h"
#include "bta_api.h"
#include "gki.h"
#include "btu.h"
#include "bte.h"
#include "btif_dm.h"
#include "btif_util.h"
#include "bta_ag_api.h"
#include "bta_av_api.h"
#include "bta_hh_api.h"
#include "bta_hf_client_api.h"
#include "bta_hd_api.h"
#include "avrc_defs.h"

/************************************************************************************
**  Constants & Macros
************************************************************************************/
#define ISDIGIT(a)  ((a>='0') && (a<='9'))
#define ISXDIGIT(a) (((a>='0') && (a<='9'))||((a>='A') && (a<='F'))||((a>='a') && (a<='f')))

/************************************************************************************
**  Local type definitions
************************************************************************************/

/************************************************************************************
**  Static variables
************************************************************************************/

/************************************************************************************
**  Static functions
************************************************************************************/

/************************************************************************************
**  Externs
************************************************************************************/

/************************************************************************************
**  Functions
************************************************************************************/

/*****************************************************************************
**   Logging helper functions
*****************************************************************************/

UINT32 devclass2uint(DEV_CLASS dev_class)
{
    UINT32 cod = 0;

    if(dev_class != NULL)
    {
        /* if COD is 0, irrespective of the device type set it to Unclassified device */
        cod = (dev_class[2]) | (dev_class[1] << 8) | (dev_class[0] << 16);
    }
    return cod;
}
void uint2devclass(UINT32 cod, DEV_CLASS dev_class)
{
    dev_class[2] = (UINT8)cod;
    dev_class[1] = (UINT8)(cod >> 8);
    dev_class[0] = (UINT8)(cod >> 16);
}

static const UINT8  sdp_base_uuid[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
                                       0x80, 0x00, 0x00, 0x80, 0x5F, 0x9B, 0x34, 0xFB};

void uuid16_to_uuid128(uint16_t uuid16, bt_uuid_t* uuid128)
{
    uint16_t uuid16_bo;
    memset(uuid128, 0, sizeof(bt_uuid_t));

    memcpy(uuid128->uu, sdp_base_uuid, MAX_UUID_SIZE);
    uuid16_bo = ntohs(uuid16);
    memcpy(uuid128->uu + 2, &uuid16_bo, sizeof(uint16_t));
}

void string_to_uuid(char *str, bt_uuid_t *p_uuid)
{
    uint32_t uuid0, uuid4;
    uint16_t uuid1, uuid2, uuid3, uuid5;

    sscanf(str, "%08x-%04hx-%04hx-%04hx-%08x%04hx",
                &uuid0, &uuid1, &uuid2, &uuid3, &uuid4, &uuid5);

    uuid0 = htonl(uuid0);
    uuid1 = htons(uuid1);
    uuid2 = htons(uuid2);
    uuid3 = htons(uuid3);
    uuid4 = htonl(uuid4);
    uuid5 = htons(uuid5);

    memcpy(&(p_uuid->uu[0]), &uuid0, 4);
    memcpy(&(p_uuid->uu[4]), &uuid1, 2);
    memcpy(&(p_uuid->uu[6]), &uuid2, 2);
    memcpy(&(p_uuid->uu[8]), &uuid3, 2);
    memcpy(&(p_uuid->uu[10]), &uuid4, 4);
    memcpy(&(p_uuid->uu[14]), &uuid5, 2);

    return;

}

void uuid_to_string_legacy(bt_uuid_t *p_uuid, char *str)
{
    uint32_t uuid0, uuid4;
    uint16_t uuid1, uuid2, uuid3, uuid5;

    memcpy(&uuid0, &(p_uuid->uu[0]), 4);
    memcpy(&uuid1, &(p_uuid->uu[4]), 2);
    memcpy(&uuid2, &(p_uuid->uu[6]), 2);
    memcpy(&uuid3, &(p_uuid->uu[8]), 2);
    memcpy(&uuid4, &(p_uuid->uu[10]), 4);
    memcpy(&uuid5, &(p_uuid->uu[14]), 2);

    sprintf((char *)str, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x",
            ntohl(uuid0), ntohs(uuid1),
            ntohs(uuid2), ntohs(uuid3),
            ntohl(uuid4), ntohs(uuid5));
    return;
}

/*****************************************************************************
**  Function        ascii_2_hex
**
**  Description     This function converts an ASCII string into HEX
**
**  Returns         the number of hex bytes filled.
*/
int ascii_2_hex (char *p_ascii, int len, UINT8 *p_hex)
{
    int     x;
    UINT8   c;

    for (x = 0; (x < len) && (*p_ascii); x++)
    {
        if (ISDIGIT (*p_ascii))
            c = (*p_ascii - '0') << 4;
        else
            c = (toupper(*p_ascii) - 'A' + 10) << 4;

        p_ascii++;
        if (*p_ascii)
        {
            if (ISDIGIT (*p_ascii))
                c |= (*p_ascii - '0');
            else
                c |= (toupper(*p_ascii) - 'A' + 10);

            p_ascii++;
        }
        *p_hex++ = c;
    }

    return (x);
}


const char* dump_dm_search_event(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTA_DM_INQ_RES_EVT)
        CASE_RETURN_STR(BTA_DM_INQ_CMPL_EVT)
        CASE_RETURN_STR(BTA_DM_DISC_RES_EVT)
        CASE_RETURN_STR(BTA_DM_DISC_BLE_RES_EVT)
        CASE_RETURN_STR(BTA_DM_DISC_CMPL_EVT)
        CASE_RETURN_STR(BTA_DM_DI_DISC_CMPL_EVT)
        CASE_RETURN_STR(BTA_DM_SEARCH_CANCEL_CMPL_EVT)

        default:
            return "UNKNOWN MSG ID";
     }
}


const char* dump_property_type(bt_property_type_t type)
{
    switch(type)
    {
        CASE_RETURN_STR(BT_PROPERTY_BDNAME)
        CASE_RETURN_STR(BT_PROPERTY_BDADDR)
        CASE_RETURN_STR(BT_PROPERTY_UUIDS)
        CASE_RETURN_STR(BT_PROPERTY_CLASS_OF_DEVICE)
        CASE_RETURN_STR(BT_PROPERTY_TYPE_OF_DEVICE)
        CASE_RETURN_STR(BT_PROPERTY_REMOTE_RSSI)
        CASE_RETURN_STR(BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT)
        CASE_RETURN_STR(BT_PROPERTY_ADAPTER_BONDED_DEVICES)
        CASE_RETURN_STR(BT_PROPERTY_ADAPTER_SCAN_MODE)
        CASE_RETURN_STR(BT_PROPERTY_REMOTE_FRIENDLY_NAME)

        default:
            return "UNKNOWN PROPERTY ID";
    }
}

const char* dump_dm_event(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTA_DM_ENABLE_EVT)
        CASE_RETURN_STR(BTA_DM_DISABLE_EVT)
        CASE_RETURN_STR(BTA_DM_PIN_REQ_EVT)
        CASE_RETURN_STR(BTA_DM_AUTH_CMPL_EVT)
        CASE_RETURN_STR(BTA_DM_AUTHORIZE_EVT)
        CASE_RETURN_STR(BTA_DM_LINK_UP_EVT)
        CASE_RETURN_STR(BTA_DM_LINK_DOWN_EVT)
        CASE_RETURN_STR(BTA_DM_SIG_STRENGTH_EVT)
        CASE_RETURN_STR(BTA_DM_BUSY_LEVEL_EVT)
        CASE_RETURN_STR(BTA_DM_BOND_CANCEL_CMPL_EVT)
        CASE_RETURN_STR(BTA_DM_SP_CFM_REQ_EVT)
        CASE_RETURN_STR(BTA_DM_SP_KEY_NOTIF_EVT)
        CASE_RETURN_STR(BTA_DM_SP_RMT_OOB_EVT)
        CASE_RETURN_STR(BTA_DM_SP_KEYPRESS_EVT)
        CASE_RETURN_STR(BTA_DM_ROLE_CHG_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_KEY_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_SEC_REQ_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_PASSKEY_NOTIF_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_PASSKEY_REQ_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_OOB_REQ_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_LOCAL_IR_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_LOCAL_ER_EVT)
        CASE_RETURN_STR(BTA_DM_BLE_AUTH_CMPL_EVT)
        CASE_RETURN_STR(BTA_DM_DEV_UNPAIRED_EVT)
        CASE_RETURN_STR(BTA_DM_HW_ERROR_EVT)
        CASE_RETURN_STR(BTA_DM_ENER_INFO_READ)

        default:
            return "UNKNOWN DM EVENT";
    }
}

const char* dump_hf_event(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTA_AG_ENABLE_EVT)
        CASE_RETURN_STR(BTA_AG_REGISTER_EVT)
        CASE_RETURN_STR(BTA_AG_OPEN_EVT)
        CASE_RETURN_STR(BTA_AG_CLOSE_EVT)
        CASE_RETURN_STR(BTA_AG_CONN_EVT)
        CASE_RETURN_STR(BTA_AG_AUDIO_OPEN_EVT)
        CASE_RETURN_STR(BTA_AG_AUDIO_CLOSE_EVT)
        CASE_RETURN_STR(BTA_AG_SPK_EVT)
        CASE_RETURN_STR(BTA_AG_MIC_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CKPD_EVT)
        CASE_RETURN_STR(BTA_AG_DISABLE_EVT)
#if (BTM_WBS_INCLUDED == TRUE )
        CASE_RETURN_STR(BTA_AG_WBS_EVT)
#endif
        CASE_RETURN_STR(BTA_AG_AT_A_EVT)
        CASE_RETURN_STR(BTA_AG_AT_D_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CHLD_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CHUP_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CIND_EVT)
        CASE_RETURN_STR(BTA_AG_AT_VTS_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BINP_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BLDN_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BVRA_EVT)
        CASE_RETURN_STR(BTA_AG_AT_NREC_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CNUM_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BTRH_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CLCC_EVT)
        CASE_RETURN_STR(BTA_AG_AT_COPS_EVT)
        CASE_RETURN_STR(BTA_AG_AT_UNAT_EVT)
        CASE_RETURN_STR(BTA_AG_AT_CBC_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BAC_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BCS_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BIND_EVT)
        CASE_RETURN_STR(BTA_AG_AT_BIEV_EVT)

        default:
            return "UNKNOWN MSG ID";
     }
}

const char* dump_hf_client_event(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTA_HF_CLIENT_ENABLE_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_REGISTER_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_OPEN_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_CLOSE_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_CONN_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_AUDIO_OPEN_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_AUDIO_MSBC_OPEN_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_AUDIO_CLOSE_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_SPK_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_MIC_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_DISABLE_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_IND_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_VOICE_REC_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_OPERATOR_NAME_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_CLIP_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_CCWA_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_AT_RESULT_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_CLCC_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_CNUM_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_BTRH_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_BSIR_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_BINP_EVT)
        CASE_RETURN_STR(BTA_HF_CLIENT_RING_INDICATION)
        default:
            return "UNKNOWN MSG ID";
     }
}

const char* dump_hh_event(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTA_HH_ENABLE_EVT)
        CASE_RETURN_STR(BTA_HH_DISABLE_EVT)
        CASE_RETURN_STR(BTA_HH_OPEN_EVT)
        CASE_RETURN_STR(BTA_HH_CLOSE_EVT)
        CASE_RETURN_STR(BTA_HH_GET_DSCP_EVT)
        CASE_RETURN_STR(BTA_HH_GET_PROTO_EVT)
        CASE_RETURN_STR(BTA_HH_GET_RPT_EVT)
        CASE_RETURN_STR(BTA_HH_GET_IDLE_EVT)
        CASE_RETURN_STR(BTA_HH_SET_PROTO_EVT)
        CASE_RETURN_STR(BTA_HH_SET_RPT_EVT)
        CASE_RETURN_STR(BTA_HH_SET_IDLE_EVT)
        CASE_RETURN_STR(BTA_HH_VC_UNPLUG_EVT)
        CASE_RETURN_STR(BTA_HH_ADD_DEV_EVT)
        CASE_RETURN_STR(BTA_HH_RMV_DEV_EVT)
        CASE_RETURN_STR(BTA_HH_API_ERR_EVT)
        default:
            return "UNKNOWN MSG ID";
     }
}

const char* dump_hd_event(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTA_HD_ENABLE_EVT)
        CASE_RETURN_STR(BTA_HD_DISABLE_EVT)
        CASE_RETURN_STR(BTA_HD_REGISTER_APP_EVT)
        CASE_RETURN_STR(BTA_HD_UNREGISTER_APP_EVT)
        CASE_RETURN_STR(BTA_HD_OPEN_EVT)
        CASE_RETURN_STR(BTA_HD_CLOSE_EVT)
        CASE_RETURN_STR(BTA_HD_GET_REPORT_EVT)
        CASE_RETURN_STR(BTA_HD_SET_REPORT_EVT)
        CASE_RETURN_STR(BTA_HD_SET_PROTOCOL_EVT)
        CASE_RETURN_STR(BTA_HD_INTR_DATA_EVT)
        CASE_RETURN_STR(BTA_HD_VC_UNPLUG_EVT)
        CASE_RETURN_STR(BTA_HD_API_ERR_EVT)
        default:
            return "UNKNOWN MSG ID";
     }
}

const char* dump_hf_conn_state(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTHF_CONNECTION_STATE_DISCONNECTED)
        CASE_RETURN_STR(BTHF_CONNECTION_STATE_CONNECTING)
        CASE_RETURN_STR(BTHF_CONNECTION_STATE_CONNECTED)
        CASE_RETURN_STR(BTHF_CONNECTION_STATE_SLC_CONNECTED)
        CASE_RETURN_STR(BTHF_CONNECTION_STATE_DISCONNECTING)
        default:
            return "UNKNOWN MSG ID";
    }
}

const char* dump_hf_call_state(bthf_call_state_t call_state)
{
    switch(call_state)
    {
        CASE_RETURN_STR(BTHF_CALL_STATE_IDLE)
        CASE_RETURN_STR(BTHF_CALL_STATE_HELD)
        CASE_RETURN_STR(BTHF_CALL_STATE_DIALING)
        CASE_RETURN_STR(BTHF_CALL_STATE_ALERTING)
        CASE_RETURN_STR(BTHF_CALL_STATE_INCOMING)
        CASE_RETURN_STR(BTHF_CALL_STATE_WAITING)
        CASE_RETURN_STR(BTHF_CALL_STATE_ACTIVE)
        default:
            return "UNKNOWN CALL STATE";
    }
}

const char* dump_thread_evt(bt_cb_thread_evt evt)
{
    switch(evt)
    {
        CASE_RETURN_STR(ASSOCIATE_JVM)
        CASE_RETURN_STR(DISASSOCIATE_JVM)

        default:
            return "unknown thread evt";
    }
}


const char* dump_hf_audio_state(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTHF_AUDIO_STATE_DISCONNECTED)
        CASE_RETURN_STR(BTHF_AUDIO_STATE_CONNECTING)
        CASE_RETURN_STR(BTHF_AUDIO_STATE_CONNECTED)
        CASE_RETURN_STR(BTHF_AUDIO_STATE_DISCONNECTING)
        default:
           return "UNKNOWN MSG ID";

    }
}

const char* dump_av_conn_state(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTAV_CONNECTION_STATE_DISCONNECTED)
        CASE_RETURN_STR(BTAV_CONNECTION_STATE_CONNECTING)
        CASE_RETURN_STR(BTAV_CONNECTION_STATE_CONNECTED)
        CASE_RETURN_STR(BTAV_CONNECTION_STATE_DISCONNECTING)
        default:
            return "UNKNOWN MSG ID";
    }
}

const char* dump_av_audio_state(UINT16 event)
{
    switch(event)
    {
        CASE_RETURN_STR(BTAV_AUDIO_STATE_REMOTE_SUSPEND)
        CASE_RETURN_STR(BTAV_AUDIO_STATE_STOPPED)
        CASE_RETURN_STR(BTAV_AUDIO_STATE_STARTED)
        default:
            return "UNKNOWN MSG ID";
    }
}

const char* dump_adapter_scan_mode(bt_scan_mode_t mode)
{
    switch(mode)
    {
        CASE_RETURN_STR(BT_SCAN_MODE_NONE)
        CASE_RETURN_STR(BT_SCAN_MODE_CONNECTABLE)
        CASE_RETURN_STR(BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE)

        default:
            return "unknown scan mode";
    }
}

const char* dump_bt_status(bt_status_t status)
{
    switch(status)
    {
        CASE_RETURN_STR(BT_STATUS_SUCCESS)
        CASE_RETURN_STR(BT_STATUS_FAIL)
        CASE_RETURN_STR(BT_STATUS_NOT_READY)
        CASE_RETURN_STR(BT_STATUS_NOMEM)
        CASE_RETURN_STR(BT_STATUS_BUSY)
        CASE_RETURN_STR(BT_STATUS_UNSUPPORTED)

        default:
            return "unknown scan mode";
    }
}

const char *dump_rc_event(UINT8 event)
{
   switch(event) {
        CASE_RETURN_STR(BTA_AV_RC_OPEN_EVT)
        CASE_RETURN_STR(BTA_AV_RC_CLOSE_EVT)
        CASE_RETURN_STR(BTA_AV_REMOTE_CMD_EVT)
        CASE_RETURN_STR(BTA_AV_REMOTE_RSP_EVT)
        CASE_RETURN_STR(BTA_AV_VENDOR_CMD_EVT)
        CASE_RETURN_STR(BTA_AV_VENDOR_RSP_EVT)
        CASE_RETURN_STR(BTA_AV_META_MSG_EVT)
        CASE_RETURN_STR(BTA_AV_RC_FEAT_EVT)
        CASE_RETURN_STR(BTA_AV_BROWSE_MSG_EVT)
        default:
            return "UNKNOWN_EVENT";
   }
}

const char * dump_rc_notification_event_id(UINT8 event_id)
{
    switch(event_id)
    {
        CASE_RETURN_STR(AVRC_EVT_PLAY_STATUS_CHANGE)
        CASE_RETURN_STR(AVRC_EVT_TRACK_CHANGE)
        CASE_RETURN_STR(AVRC_EVT_TRACK_REACHED_END)
        CASE_RETURN_STR(AVRC_EVT_TRACK_REACHED_START)
        CASE_RETURN_STR(AVRC_EVT_PLAY_POS_CHANGED)
        CASE_RETURN_STR(AVRC_EVT_BATTERY_STATUS_CHANGE)
        CASE_RETURN_STR(AVRC_EVT_SYSTEM_STATUS_CHANGE)
        CASE_RETURN_STR(AVRC_EVT_APP_SETTING_CHANGE)
        CASE_RETURN_STR(AVRC_EVT_VOLUME_CHANGE)
        CASE_RETURN_STR(AVRC_EVT_NOW_PLAYING_CHANGE)
        default:
            return "Unhandled Event ID";
    }
}

const char*  dump_rc_pdu(UINT8 pdu)
{
    switch(pdu)
    {
        CASE_RETURN_STR(AVRC_PDU_LIST_PLAYER_APP_ATTR)
        CASE_RETURN_STR(AVRC_PDU_LIST_PLAYER_APP_VALUES)
        CASE_RETURN_STR(AVRC_PDU_GET_CUR_PLAYER_APP_VALUE)
        CASE_RETURN_STR(AVRC_PDU_SET_PLAYER_APP_VALUE)
        CASE_RETURN_STR(AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT)
        CASE_RETURN_STR(AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT)
        CASE_RETURN_STR(AVRC_PDU_INFORM_DISPLAY_CHARSET)
        CASE_RETURN_STR(AVRC_PDU_INFORM_BATTERY_STAT_OF_CT)
        CASE_RETURN_STR(AVRC_PDU_GET_ELEMENT_ATTR)
        CASE_RETURN_STR(AVRC_PDU_GET_PLAY_STATUS)
        CASE_RETURN_STR(AVRC_PDU_REGISTER_NOTIFICATION)
        CASE_RETURN_STR(AVRC_PDU_REQUEST_CONTINUATION_RSP)
        CASE_RETURN_STR(AVRC_PDU_ABORT_CONTINUATION_RSP)
        CASE_RETURN_STR(AVRC_PDU_SET_ABSOLUTE_VOLUME)
        CASE_RETURN_STR(AVRC_PDU_SET_ADDRESSED_PLAYER)
        CASE_RETURN_STR(AVRC_PDU_CHANGE_PATH)
        CASE_RETURN_STR(AVRC_PDU_GET_CAPABILITIES)
        default:
            return "Unknown PDU";
    }
}