path: root/btif/src/btif_rc.cc

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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_rc.cc
 *
 *  Description:   Bluetooth AVRC implementation
 *
 *****************************************************************************/

#define LOG_TAG "bt_btif_avrc"

#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include <mutex>

#include <hardware/bluetooth.h>
#include <hardware/bt_rc.h>

#include "avrc_defs.h"
#include "bt_common.h"
#include "bta_api.h"
#include "bta_av_api.h"
#include "btif_av.h"
#include "btif_common.h"
#include "btif_util.h"
#include "btu.h"
#include "device/include/interop.h"
#include "osi/include/list.h"
#include "osi/include/osi.h"
#include "osi/include/properties.h"
#define RC_INVALID_TRACK_ID (0xFFFFFFFFFFFFFFFFULL)

/*****************************************************************************
 *  Constants & Macros
 *****************************************************************************/

/* cod value for Headsets */
#define COD_AV_HEADSETS 0x0404
/* for AVRC 1.4 need to change this */
#define MAX_RC_NOTIFICATIONS AVRC_EVT_VOLUME_CHANGE

#define IDX_GET_PLAY_STATUS_RSP 0
#define IDX_LIST_APP_ATTR_RSP 1
#define IDX_LIST_APP_VALUE_RSP 2
#define IDX_GET_CURR_APP_VAL_RSP 3
#define IDX_SET_APP_VAL_RSP 4
#define IDX_GET_APP_ATTR_TXT_RSP 5
#define IDX_GET_APP_VAL_TXT_RSP 6
#define IDX_GET_ELEMENT_ATTR_RSP 7
#define IDX_SET_ADDR_PLAYER_RSP 8
#define IDX_SET_BROWSED_PLAYER_RSP 9
#define IDX_GET_FOLDER_ITEMS_RSP 10
#define IDX_CHG_PATH_RSP 11
#define IDX_GET_ITEM_ATTR_RSP 12
#define IDX_PLAY_ITEM_RSP 13
#define IDX_GET_TOTAL_NUM_OF_ITEMS_RSP 14
#define IDX_SEARCH_RSP 15
#define IDX_ADD_TO_NOW_PLAYING_RSP 16

/* Update MAX value whenever IDX will be changed */
#define MAX_CMD_QUEUE_LEN 17

#define MAX_VOLUME 128
#define MAX_LABEL 16
#define MAX_TRANSACTIONS_PER_SESSION 16
#define PLAY_STATUS_PLAYING 1
#define BTIF_RC_NUM_CONN BT_RC_NUM_APP

#define CHECK_RC_CONNECTED(p_dev)                                          \
  do {                                                                     \
    if ((p_dev) == NULL || (p_dev)->rc_connected == false) {               \
      BTIF_TRACE_WARNING("%s: called when RC is not connected", __func__); \
      return BT_STATUS_NOT_READY;                                          \
    }                                                                      \
  } while (0)

#define CHECK_BR_CONNECTED(p_dev)                                          \
  do {                                                                     \
    if ((p_dev) == NULL || (p_dev)->br_connected == false) {               \
      BTIF_TRACE_WARNING("%s: called when BR is not connected", __func__); \
      return BT_STATUS_NOT_READY;                                          \
    }                                                                      \
  } while (0)

/*****************************************************************************
 *  Local type definitions
 *****************************************************************************/
typedef struct {
  uint8_t bNotify;
  uint8_t label;
} btif_rc_reg_notifications_t;

typedef struct {
  uint8_t label;
  uint8_t ctype;
  bool is_rsp_pending;
} btif_rc_cmd_ctxt_t;

/* 2 second timeout to get interim response */
#define BTIF_TIMEOUT_RC_INTERIM_RSP_MS (2 * 1000)
#define BTIF_TIMEOUT_RC_STATUS_CMD_MS (2 * 1000)
#define BTIF_TIMEOUT_RC_CONTROL_CMD_MS (2 * 1000)

typedef enum {
  eNOT_REGISTERED,
  eREGISTERED,
  eINTERIM
} btif_rc_nfn_reg_status_t;

typedef struct {
  uint8_t event_id;
  uint8_t label;
  btif_rc_nfn_reg_status_t status;
} btif_rc_supported_event_t;

#define BTIF_RC_STS_TIMEOUT 0xFE
typedef struct {
  uint8_t label;
  uint8_t pdu_id;
} btif_rc_status_cmd_timer_t;

typedef struct {
  uint8_t label;
  uint8_t pdu_id;
} btif_rc_control_cmd_timer_t;

typedef struct {
  union {
    btif_rc_status_cmd_timer_t rc_status_cmd;
    btif_rc_control_cmd_timer_t rc_control_cmd;
  };
  RawAddress rc_addr;
} btif_rc_timer_context_t;

typedef struct {
  bool query_started;
  uint8_t num_attrs;
  uint8_t num_ext_attrs;

  uint8_t attr_index;
  uint8_t ext_attr_index;
  uint8_t ext_val_index;
  btrc_player_app_attr_t attrs[AVRC_MAX_APP_ATTR_SIZE];
  btrc_player_app_ext_attr_t ext_attrs[AVRC_MAX_APP_ATTR_SIZE];
} btif_rc_player_app_settings_t;

/* TODO : Merge btif_rc_reg_notifications_t and btif_rc_cmd_ctxt_t to a single
 * struct */
typedef struct {
  bool rc_connected;
  bool br_connected;  // Browsing channel.
  uint8_t rc_handle;
  tBTA_AV_FEAT rc_features;
  btrc_connection_state_t rc_state;
  RawAddress rc_addr;
  uint16_t rc_pending_play;
  btif_rc_cmd_ctxt_t rc_pdu_info[MAX_CMD_QUEUE_LEN];
  btif_rc_reg_notifications_t rc_notif[MAX_RC_NOTIFICATIONS];
  unsigned int rc_volume;
  uint8_t rc_vol_label;
  list_t* rc_supported_event_list;
  btif_rc_player_app_settings_t rc_app_settings;
  alarm_t* rc_play_status_timer;
  bool rc_features_processed;
  uint64_t rc_playing_uid;
  bool rc_procedure_complete;
} btif_rc_device_cb_t;

typedef struct {
  std::mutex lock;
  btif_rc_device_cb_t rc_multi_cb[BTIF_RC_NUM_CONN];
} rc_cb_t;

typedef struct {
  bool in_use;
  uint8_t lbl;
  uint8_t handle;
  btif_rc_timer_context_t txn_timer_context;
  alarm_t* txn_timer;
} rc_transaction_t;

typedef struct {
  std::recursive_mutex lbllock;
  rc_transaction_t transaction[MAX_TRANSACTIONS_PER_SESSION];
} rc_device_t;

typedef struct {
  uint8_t label;
  RawAddress rc_addr;
} rc_context_t;

typedef struct { uint8_t handle; } btif_rc_handle_t;

rc_device_t device;

static void sleep_ms(period_ms_t timeout_ms);

/* Response status code - Unknown Error - this is changed to "reserved" */
#define BTIF_STS_GEN_ERROR 0x06

/* Utility table to map hal status codes to bta status codes for the response
 * status */
static const uint8_t status_code_map[] = {
    /* BTA_Status codes        HAL_Status codes */
    AVRC_STS_BAD_CMD,         /* BTRC_STS_BAD_CMD */
    AVRC_STS_BAD_PARAM,       /* BTRC_STS_BAD_PARAM */
    AVRC_STS_NOT_FOUND,       /* BTRC_STS_NOT_FOUND */
    AVRC_STS_INTERNAL_ERR,    /* BTRC_STS_INTERNAL_ERR */
    AVRC_STS_NO_ERROR,        /* BTRC_STS_NO_ERROR */
    AVRC_STS_UID_CHANGED,     /* BTRC_STS_UID_CHANGED */
    BTIF_STS_GEN_ERROR,       /* BTRC_STS_RESERVED */
    AVRC_STS_BAD_DIR,         /* BTRC_STS_INV_DIRN */
    AVRC_STS_NOT_DIR,         /* BTRC_STS_INV_DIRECTORY */
    AVRC_STS_NOT_EXIST,       /* BTRC_STS_INV_ITEM */
    AVRC_STS_BAD_SCOPE,       /* BTRC_STS_INV_SCOPE */
    AVRC_STS_BAD_RANGE,       /* BTRC_STS_INV_RANGE */
    AVRC_STS_UID_IS_DIR,      /* BTRC_STS_DIRECTORY */
    AVRC_STS_IN_USE,          /* BTRC_STS_MEDIA_IN_USE */
    AVRC_STS_NOW_LIST_FULL,   /* BTRC_STS_PLAY_LIST_FULL */
    AVRC_STS_SEARCH_NOT_SUP,  /* BTRC_STS_SRCH_NOT_SPRTD */
    AVRC_STS_SEARCH_BUSY,     /* BTRC_STS_SRCH_IN_PROG */
    AVRC_STS_BAD_PLAYER_ID,   /* BTRC_STS_INV_PLAYER */
    AVRC_STS_PLAYER_N_BR,     /* BTRC_STS_PLAY_NOT_BROW */
    AVRC_STS_PLAYER_N_ADDR,   /* BTRC_STS_PLAY_NOT_ADDR */
    AVRC_STS_BAD_SEARCH_RES,  /* BTRC_STS_INV_RESULTS */
    AVRC_STS_NO_AVAL_PLAYER,  /* BTRC_STS_NO_AVBL_PLAY */
    AVRC_STS_ADDR_PLAYER_CHG, /* BTRC_STS_ADDR_PLAY_CHGD */
};

static void send_reject_response(uint8_t rc_handle, uint8_t label, uint8_t pdu,
                                 uint8_t status, uint8_t opcode);
static uint8_t opcode_from_pdu(uint8_t pdu);
static void send_metamsg_rsp(btif_rc_device_cb_t* p_dev, int index,
                             uint8_t label, tBTA_AV_CODE code,
                             tAVRC_RESPONSE* pmetamsg_resp);
static void register_volumechange(uint8_t label, btif_rc_device_cb_t* p_dev);
static void lbl_init();
static void init_all_transactions();
static bt_status_t get_transaction(rc_transaction_t** ptransaction);
static void release_transaction(uint8_t label);
static rc_transaction_t* get_transaction_by_lbl(uint8_t label);
static void handle_rc_metamsg_rsp(tBTA_AV_META_MSG* pmeta_msg,
                                  btif_rc_device_cb_t* p_dev);

static void handle_avk_rc_metamsg_cmd(tBTA_AV_META_MSG* pmeta_msg);
static void handle_avk_rc_metamsg_rsp(tBTA_AV_META_MSG* pmeta_msg);
static void btif_rc_ctrl_upstreams_rsp_cmd(uint8_t event,
                                           tAVRC_COMMAND* pavrc_cmd,
                                           uint8_t label,
                                           btif_rc_device_cb_t* p_dev);
static void rc_ctrl_procedure_complete(btif_rc_device_cb_t* p_dev);
static void rc_stop_play_status_timer(btif_rc_device_cb_t* p_dev);
static void register_for_event_notification(btif_rc_supported_event_t* p_event,
                                            btif_rc_device_cb_t* p_dev);
static void handle_get_capability_response(tBTA_AV_META_MSG* pmeta_msg,
                                           tAVRC_GET_CAPS_RSP* p_rsp);
static void handle_app_attr_response(tBTA_AV_META_MSG* pmeta_msg,
                                     tAVRC_LIST_APP_ATTR_RSP* p_rsp);
static void handle_app_val_response(tBTA_AV_META_MSG* pmeta_msg,
                                    tAVRC_LIST_APP_VALUES_RSP* p_rsp);
static void handle_app_cur_val_response(tBTA_AV_META_MSG* pmeta_msg,
                                        tAVRC_GET_CUR_APP_VALUE_RSP* p_rsp);
static void handle_app_attr_txt_response(tBTA_AV_META_MSG* pmeta_msg,
                                         tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp);
static void handle_app_attr_val_txt_response(tBTA_AV_META_MSG* pmeta_msg,
                                             tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp);
static void handle_get_playstatus_response(tBTA_AV_META_MSG* pmeta_msg,
                                           tAVRC_GET_PLAY_STATUS_RSP* p_rsp);
static void handle_set_addressed_player_response(tBTA_AV_META_MSG* pmeta_msg,
                                                 tAVRC_RSP* p_rsp);
static void handle_get_elem_attr_response(tBTA_AV_META_MSG* pmeta_msg,
                                          tAVRC_GET_ATTRS_RSP* p_rsp);
static void handle_set_app_attr_val_response(tBTA_AV_META_MSG* pmeta_msg,
                                             tAVRC_RSP* p_rsp);
static bt_status_t get_play_status_cmd(btif_rc_device_cb_t* p_dev);
static bt_status_t get_player_app_setting_attr_text_cmd(
    uint8_t* attrs, uint8_t num_attrs, btif_rc_device_cb_t* p_dev);
static bt_status_t get_player_app_setting_value_text_cmd(
    uint8_t* vals, uint8_t num_vals, btif_rc_device_cb_t* p_dev);
static bt_status_t register_notification_cmd(uint8_t label, uint8_t event_id,
                                             uint32_t event_value,
                                             btif_rc_device_cb_t* p_dev);
static bt_status_t get_element_attribute_cmd(uint8_t num_attribute,
                                             uint32_t* p_attr_ids,
                                             btif_rc_device_cb_t* p_dev);
static bt_status_t getcapabilities_cmd(uint8_t cap_id,
                                       btif_rc_device_cb_t* p_dev);
static bt_status_t list_player_app_setting_attrib_cmd(
    btif_rc_device_cb_t* p_dev);
static bt_status_t list_player_app_setting_value_cmd(
    uint8_t attrib_id, btif_rc_device_cb_t* p_dev);
static bt_status_t get_player_app_setting_cmd(uint8_t num_attrib,
                                              uint8_t* attrib_ids,
                                              btif_rc_device_cb_t* p_dev);
void get_folder_item_type_media(const tAVRC_ITEM* avrc_item,
                                btrc_folder_items_t* btrc_item);
void get_folder_item_type_folder(const tAVRC_ITEM* avrc_item,
                                 btrc_folder_items_t* btrc_item);
void get_folder_item_type_player(const tAVRC_ITEM* avrc_item,
                                 btrc_folder_items_t* btrc_item);
static bt_status_t get_folder_items_cmd(RawAddress* bd_addr, uint8_t scope,
                                        uint8_t start_item, uint8_t num_items);

static void btif_rc_upstreams_evt(uint16_t event, tAVRC_COMMAND* p_param,
                                  uint8_t ctype, uint8_t label,
                                  btif_rc_device_cb_t* p_dev);

static void btif_rc_upstreams_rsp_evt(uint16_t event,
                                      tAVRC_RESPONSE* pavrc_resp, uint8_t ctype,
                                      uint8_t label,
                                      btif_rc_device_cb_t* p_dev);

static void rc_start_play_status_timer(btif_rc_device_cb_t* p_dev);
static bool absolute_volume_disabled(void);

/*****************************************************************************
 *  Static variables
 *****************************************************************************/
static rc_cb_t btif_rc_cb;
static btrc_callbacks_t* bt_rc_callbacks = NULL;
static btrc_ctrl_callbacks_t* bt_rc_ctrl_callbacks = NULL;

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

/*****************************************************************************
 *  Externs
 *****************************************************************************/
extern bool btif_hf_call_terminated_recently();
extern bool check_cod(const RawAddress* remote_bdaddr, uint32_t cod);

/*****************************************************************************
 *  Functions
 *****************************************************************************/
static btif_rc_device_cb_t* alloc_device() {
  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    if (btif_rc_cb.rc_multi_cb[idx].rc_state ==
        BTRC_CONNECTION_STATE_DISCONNECTED) {
      return (&btif_rc_cb.rc_multi_cb[idx]);
    }
  }
  return NULL;
}

static btif_rc_device_cb_t* get_connected_device(int index) {
  BTIF_TRACE_DEBUG("%s: index: %d", __func__, index);
  if (index > BTIF_RC_NUM_CONN) {
    BTIF_TRACE_ERROR("%s: can't support more than %d connections", __func__,
                     BTIF_RC_NUM_CONN);
    return NULL;
  }
  if (btif_rc_cb.rc_multi_cb[index].rc_state !=
      BTRC_CONNECTION_STATE_CONNECTED) {
    BTIF_TRACE_ERROR("%s: returning NULL", __func__);
    return NULL;
  }
  return (&btif_rc_cb.rc_multi_cb[index]);
}

static int get_num_connected_devices() {
  int connected_devices = 0;
  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    if (btif_rc_cb.rc_multi_cb[idx].rc_state ==
        BTRC_CONNECTION_STATE_CONNECTED) {
      connected_devices++;
    }
  }
  BTIF_TRACE_DEBUG("%s: returning connected_devices: %d", __func__,
                   connected_devices);
  return connected_devices;
}

btif_rc_device_cb_t* btif_rc_get_device_by_bda(const RawAddress* bd_addr) {
  VLOG(1) << __func__ << ": bd_addr: " << *bd_addr;

  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    if ((btif_rc_cb.rc_multi_cb[idx].rc_state !=
         BTRC_CONNECTION_STATE_DISCONNECTED) &&
        btif_rc_cb.rc_multi_cb[idx].rc_addr == *bd_addr) {
      return (&btif_rc_cb.rc_multi_cb[idx]);
    }
  }
  BTIF_TRACE_ERROR("%s: device not found, returning NULL!", __func__);
  return NULL;
}

btif_rc_device_cb_t* btif_rc_get_device_by_handle(uint8_t handle) {
  BTIF_TRACE_DEBUG("%s: handle: 0x%x", __func__, handle);
  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    if ((btif_rc_cb.rc_multi_cb[idx].rc_state !=
         BTRC_CONNECTION_STATE_DISCONNECTED) &&
        (btif_rc_cb.rc_multi_cb[idx].rc_handle == handle)) {
      BTIF_TRACE_DEBUG("%s: btif_rc_cb.rc_multi_cb[idx].rc_handle: 0x%x",
                       __func__, btif_rc_cb.rc_multi_cb[idx].rc_handle);
      return (&btif_rc_cb.rc_multi_cb[idx]);
    }
  }
  BTIF_TRACE_ERROR("%s: returning NULL", __func__);
  return NULL;
}

void fill_pdu_queue(int index, uint8_t ctype, uint8_t label, bool pending,
                    btif_rc_device_cb_t* p_dev) {
  p_dev->rc_pdu_info[index].ctype = ctype;
  p_dev->rc_pdu_info[index].label = label;
  p_dev->rc_pdu_info[index].is_rsp_pending = pending;
}

void fill_avrc_attr_entry(tAVRC_ATTR_ENTRY* attr_vals, int num_attrs,
                          btrc_element_attr_val_t* p_attrs) {
  for (int attr_cnt = 0; attr_cnt < num_attrs; attr_cnt++) {
    attr_vals[attr_cnt].attr_id = p_attrs[attr_cnt].attr_id;
    attr_vals[attr_cnt].name.charset_id = AVRC_CHARSET_ID_UTF8;
    attr_vals[attr_cnt].name.str_len =
        (uint16_t)strlen((char*)p_attrs[attr_cnt].text);
    attr_vals[attr_cnt].name.p_str = p_attrs[attr_cnt].text;
    BTIF_TRACE_DEBUG(
        "%s: attr_id: 0x%x, charset_id: 0x%x, str_len: %d, str: %s", __func__,
        (unsigned int)attr_vals[attr_cnt].attr_id,
        attr_vals[attr_cnt].name.charset_id, attr_vals[attr_cnt].name.str_len,
        attr_vals[attr_cnt].name.p_str);
  }
}

void rc_cleanup_sent_cmd(void* p_data) { BTIF_TRACE_DEBUG("%s: ", __func__); }

void handle_rc_ctrl_features(btif_rc_device_cb_t* p_dev) {
  if (!(p_dev->rc_features & BTA_AV_FEAT_RCTG) &&
      (!(p_dev->rc_features & BTA_AV_FEAT_RCCT) ||
       !(p_dev->rc_features & BTA_AV_FEAT_ADV_CTRL))) {
    return;
  }

  int rc_features = 0;

  if ((p_dev->rc_features & BTA_AV_FEAT_ADV_CTRL) &&
      (p_dev->rc_features & BTA_AV_FEAT_RCCT)) {
    rc_features |= BTRC_FEAT_ABSOLUTE_VOLUME;
  }

  if ((p_dev->rc_features & BTA_AV_FEAT_METADATA) &&
      (p_dev->rc_features & BTA_AV_FEAT_VENDOR) &&
      (p_dev->rc_features_processed != true)) {
    rc_features |= BTRC_FEAT_METADATA;

    /* Mark rc features processed to avoid repeating
     * the AVRCP procedure every time on receiving this
     * update.
     */
    p_dev->rc_features_processed = true;
    if (btif_av_is_sink_enabled()) {
      getcapabilities_cmd(AVRC_CAP_COMPANY_ID, p_dev);
    }
  }

  /* Add browsing feature capability */
  if (p_dev->rc_features & BTA_AV_FEAT_BROWSE) {
    rc_features |= BTRC_FEAT_BROWSE;
  }

  BTIF_TRACE_DEBUG("%s: Update rc features to CTRL: %d", __func__, rc_features);
  RawAddress rc_addr = p_dev->rc_addr;
  HAL_CBACK(bt_rc_ctrl_callbacks, getrcfeatures_cb, &rc_addr, rc_features);
}

void handle_rc_features(btif_rc_device_cb_t* p_dev) {
  RawAddress rc_addr = p_dev->rc_addr;

  CHECK(bt_rc_callbacks);

  btrc_remote_features_t rc_features = BTRC_FEAT_NONE;
  RawAddress avdtp_addr = btif_av_get_addr();

  BTIF_TRACE_DEBUG("%s: AVDTP Address: %s AVCTP address: %s", __func__,
                   avdtp_addr.ToString().c_str(), rc_addr.ToString().c_str());

  if (interop_match_addr(INTEROP_DISABLE_ABSOLUTE_VOLUME, &rc_addr) ||
      absolute_volume_disabled() || avdtp_addr != rc_addr) {
    p_dev->rc_features &= ~BTA_AV_FEAT_ADV_CTRL;
  }

  if (p_dev->rc_features & BTA_AV_FEAT_BROWSE) {
    rc_features = (btrc_remote_features_t)(rc_features | BTRC_FEAT_BROWSE);
  }

#if (AVRC_ADV_CTRL_INCLUDED == TRUE)
  if ((p_dev->rc_features & BTA_AV_FEAT_ADV_CTRL) &&
      (p_dev->rc_features & BTA_AV_FEAT_RCTG)) {
    rc_features =
        (btrc_remote_features_t)(rc_features | BTRC_FEAT_ABSOLUTE_VOLUME);
  }
#endif

  if (p_dev->rc_features & BTA_AV_FEAT_METADATA) {
    rc_features = (btrc_remote_features_t)(rc_features | BTRC_FEAT_METADATA);
  }

  BTIF_TRACE_DEBUG("%s: rc_features: 0x%x", __func__, rc_features);
  HAL_CBACK(bt_rc_callbacks, remote_features_cb, &rc_addr, rc_features);

#if (AVRC_ADV_CTRL_INCLUDED == TRUE)
  BTIF_TRACE_DEBUG(
      "%s: Checking for feature flags in btif_rc_handler with label: %d",
      __func__, p_dev->rc_vol_label);
  // Register for volume change on connect
  if (p_dev->rc_features & BTA_AV_FEAT_ADV_CTRL &&
      p_dev->rc_features & BTA_AV_FEAT_RCTG) {
    rc_transaction_t* p_transaction = NULL;
    bt_status_t status = BT_STATUS_NOT_READY;
    if (MAX_LABEL == p_dev->rc_vol_label) {
      status = get_transaction(&p_transaction);
    } else {
      p_transaction = get_transaction_by_lbl(p_dev->rc_vol_label);
      if (NULL != p_transaction) {
        BTIF_TRACE_DEBUG(
            "%s: register_volumechange already in progress for label: %d",
            __func__, p_dev->rc_vol_label);
        return;
      }
      status = get_transaction(&p_transaction);
    }
    if (BT_STATUS_SUCCESS == status && NULL != p_transaction) {
      p_dev->rc_vol_label = p_transaction->lbl;
      register_volumechange(p_dev->rc_vol_label, p_dev);
    }
  }
#endif
}

/***************************************************************************
 *  Function       handle_rc_connect
 *
 *  - Argument:    tBTA_AV_RC_OPEN  browse RC open data structure
 *
 *  - Description: browse RC connection event handler
 *
 ***************************************************************************/
void handle_rc_browse_connect(tBTA_AV_RC_BROWSE_OPEN* p_rc_br_open) {
  BTIF_TRACE_DEBUG("%s: rc_handle %d status %d", __func__,
                   p_rc_br_open->rc_handle, p_rc_br_open->status);
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(p_rc_br_open->rc_handle);

  if (!p_dev) {
    BTIF_TRACE_ERROR("%s p_dev is null", __func__);
    return;
  }

  /* check that we are already connected to this address since being connected
   * to a browse when not connected to the control channel over AVRCP is
   * probably not preferred anyways. */
  if (p_rc_br_open->status == BTA_AV_SUCCESS) {
    RawAddress rc_addr = p_dev->rc_addr;
    p_dev->br_connected = true;
    HAL_CBACK(bt_rc_ctrl_callbacks, connection_state_cb, true, true, &rc_addr);
  }
}

/***************************************************************************
 *  Function       handle_rc_connect
 *
 *  - Argument:    tBTA_AV_RC_OPEN  RC open data structure
 *
 *  - Description: RC connection event handler
 *
 ***************************************************************************/
void handle_rc_connect(tBTA_AV_RC_OPEN* p_rc_open) {
  BTIF_TRACE_DEBUG("%s: rc_handle: %d", __func__, p_rc_open->rc_handle);

  btif_rc_device_cb_t* p_dev = alloc_device();
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev is NULL", __func__);
    return;
  }

  if (!(p_rc_open->status == BTA_AV_SUCCESS)) {
    BTIF_TRACE_ERROR("%s: Connect failed with error code: %d", __func__,
                     p_rc_open->status);
    p_dev->rc_connected = false;
  }

  // check if already some RC is connected
  if (p_dev->rc_connected) {
    BTIF_TRACE_ERROR(
        "%s: Got RC OPEN in connected state, Connected RC: %d \
            and Current RC: %d",
        __func__, p_dev->rc_handle, p_rc_open->rc_handle);
    if (p_dev->rc_handle != p_rc_open->rc_handle &&
        p_dev->rc_addr != p_rc_open->peer_addr) {
      BTIF_TRACE_DEBUG("%s: Got RC connected for some other handle", __func__);
      BTA_AvCloseRc(p_rc_open->rc_handle);
      return;
    }
  }
  p_dev->rc_addr = p_rc_open->peer_addr;
  p_dev->rc_features = p_rc_open->peer_features;
  BTIF_TRACE_DEBUG("%s: handle_rc_connect in features: 0x%x out features 0x%x",
                   __func__, p_rc_open->peer_features, p_dev->rc_features);
  p_dev->rc_vol_label = MAX_LABEL;
  p_dev->rc_volume = MAX_VOLUME;

  p_dev->rc_connected = true;
  p_dev->rc_handle = p_rc_open->rc_handle;
  p_dev->rc_state = BTRC_CONNECTION_STATE_CONNECTED;
  /* on locally initiated connection we will get remote features as part of
   * connect */
  if (p_dev->rc_features != 0 && bt_rc_callbacks != NULL) {
    handle_rc_features(p_dev);
  }

  p_dev->rc_playing_uid = RC_INVALID_TRACK_ID;
  if (bt_rc_ctrl_callbacks != NULL) {
    RawAddress rc_addr = p_dev->rc_addr;
    HAL_CBACK(bt_rc_ctrl_callbacks, connection_state_cb, true, false, &rc_addr);
  }
  /* report connection state if remote device is AVRCP target */
  handle_rc_ctrl_features(p_dev);
}

/***************************************************************************
 *  Function       handle_rc_disconnect
 *
 *  - Argument:    tBTA_AV_RC_CLOSE     RC close data structure
 *
 *  - Description: RC disconnection event handler
 *
 ***************************************************************************/
void handle_rc_disconnect(tBTA_AV_RC_CLOSE* p_rc_close) {
  btif_rc_device_cb_t* p_dev = NULL;
  BTIF_TRACE_DEBUG("%s: rc_handle: %d", __func__, p_rc_close->rc_handle);

  p_dev = btif_rc_get_device_by_handle(p_rc_close->rc_handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: Got disconnect from invalid rc handle", __func__);
    return;
  }

  if (p_rc_close->rc_handle != p_dev->rc_handle &&
      p_dev->rc_addr != p_rc_close->peer_addr) {
    BTIF_TRACE_ERROR("Got disconnect of unknown device");
    return;
  }
  RawAddress rc_addr = p_dev->rc_addr;
  /* Clean up AVRCP procedure flags */
  memset(&p_dev->rc_app_settings, 0, sizeof(btif_rc_player_app_settings_t));
  p_dev->rc_features_processed = false;
  p_dev->rc_procedure_complete = false;
  rc_stop_play_status_timer(p_dev);
  /* Check and clear the notification event list */
  if (p_dev->rc_supported_event_list != NULL) {
    list_clear(p_dev->rc_supported_event_list);
    p_dev->rc_supported_event_list = NULL;
  }

  /* check if there is another device connected */
  if (p_dev->rc_state == BTRC_CONNECTION_STATE_CONNECTED) {
    p_dev->rc_handle = 0;
    p_dev->rc_connected = false;
    p_dev->rc_state = BTRC_CONNECTION_STATE_DISCONNECTED;

    memset(p_dev->rc_notif, 0, sizeof(p_dev->rc_notif));

    p_dev->rc_features = 0;
    p_dev->rc_vol_label = MAX_LABEL;
    p_dev->rc_volume = MAX_VOLUME;

    p_dev->rc_addr = RawAddress::kEmpty;
  }
  if (get_num_connected_devices() == 0) {
    BTIF_TRACE_DEBUG("%s: Closing all handles", __func__);
    init_all_transactions();
  }

  p_dev->rc_addr = RawAddress::kEmpty;
  /* report connection state if device is AVRCP target */
  if (bt_rc_ctrl_callbacks != NULL) {
    HAL_CBACK(bt_rc_ctrl_callbacks, connection_state_cb, false, false,
              &rc_addr);
  }
}

/***************************************************************************
 *  Function       handle_rc_passthrough_cmd
 *
 *  - Argument:    tBTA_AV_RC rc_id   remote control command ID
 *                 tBTA_AV_STATE key_state status of key press
 *
 *  - Description: Remote control command handler
 *
 ***************************************************************************/
void handle_rc_passthrough_cmd(tBTA_AV_REMOTE_CMD* p_remote_cmd) {
  if (p_remote_cmd == NULL) {
    BTIF_TRACE_ERROR("%s: No remote command!", __func__);
    return;
  }

  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(p_remote_cmd->rc_handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: Got passthrough command from invalid rc handle",
                     __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  BTIF_TRACE_DEBUG("%s: p_remote_cmd->rc_id: %d", __func__,
                   p_remote_cmd->rc_id);

  /* If AVRC is open and peer sends PLAY but there is no AVDT, then we queue-up
   * this PLAY */
  if ((p_remote_cmd->rc_id == BTA_AV_RC_PLAY) && (!btif_av_is_connected())) {
    if (p_remote_cmd->key_state == AVRC_STATE_PRESS) {
      APPL_TRACE_WARNING("%s: AVDT not open, queuing the PLAY command",
                         __func__);
      p_dev->rc_pending_play = true;
    }
    return;
  }

  /* If we previously queued a play and we get a PAUSE, clear it. */
  if ((p_remote_cmd->rc_id == BTA_AV_RC_PAUSE) && (p_dev->rc_pending_play)) {
    APPL_TRACE_WARNING("%s: Clear the pending PLAY on PAUSE received",
                       __func__);
    p_dev->rc_pending_play = false;
    return;
  }

  if ((p_remote_cmd->rc_id == BTA_AV_RC_STOP) &&
      (!btif_av_stream_started_ready())) {
    APPL_TRACE_WARNING("%s: Stream suspended, ignore STOP cmd", __func__);
    return;
  }

  int pressed = (p_remote_cmd->key_state == AVRC_STATE_PRESS) ? 1 : 0;

  /* pass all commands up */
  BTIF_TRACE_DEBUG("%s: rc_features: %d, cmd->rc_id: %d, pressed: %d", __func__,
                   p_dev->rc_features, p_remote_cmd->rc_id, pressed);
  HAL_CBACK(bt_rc_callbacks, passthrough_cmd_cb, p_remote_cmd->rc_id, pressed,
            &rc_addr);
}

/***************************************************************************
 *  Function       handle_rc_passthrough_rsp
 *
 *  - Argument:    tBTA_AV_REMOTE_RSP passthrough command response
 *
 *  - Description: Remote control passthrough response handler
 *
 ***************************************************************************/
void handle_rc_passthrough_rsp(tBTA_AV_REMOTE_RSP* p_remote_rsp) {
  btif_rc_device_cb_t* p_dev = NULL;

  p_dev = btif_rc_get_device_by_handle(p_remote_rsp->rc_handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: passthrough response for Invalid rc handle",
                     __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  if (!(p_dev->rc_features & BTA_AV_FEAT_RCTG)) {
    BTIF_TRACE_ERROR("%s: DUT does not support AVRCP controller role",
                     __func__);
    return;
  }

  const char* status = (p_remote_rsp->key_state == 1) ? "released" : "pressed";
  BTIF_TRACE_DEBUG("%s: rc_id: %d state: %s", __func__, p_remote_rsp->rc_id,
                   status);

  release_transaction(p_remote_rsp->label);
  if (bt_rc_ctrl_callbacks != NULL) {
    HAL_CBACK(bt_rc_ctrl_callbacks, passthrough_rsp_cb, &rc_addr,
              p_remote_rsp->rc_id, p_remote_rsp->key_state);
  }
}

/***************************************************************************
 *  Function       handle_rc_vendorunique_rsp
 *
 *  - Argument:    tBTA_AV_REMOTE_RSP  command response
 *
 *  - Description: Remote control vendor unique response handler
 *
 ***************************************************************************/
void handle_rc_vendorunique_rsp(tBTA_AV_REMOTE_RSP* p_remote_rsp) {
  btif_rc_device_cb_t* p_dev = NULL;
  const char* status;
  uint8_t vendor_id = 0;

  p_dev = btif_rc_get_device_by_handle(p_remote_rsp->rc_handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: Got vendorunique rsp from invalid rc handle",
                     __func__);
    return;
  }

  if (p_dev->rc_features & BTA_AV_FEAT_RCTG) {
    int key_state;
    if (p_remote_rsp->key_state == AVRC_STATE_RELEASE) {
      status = "released";
      key_state = 1;
    } else {
      status = "pressed";
      key_state = 0;
    }

    if (p_remote_rsp->len > 0) {
      if (p_remote_rsp->len >= AVRC_PASS_THRU_GROUP_LEN)
        vendor_id = p_remote_rsp->p_data[AVRC_PASS_THRU_GROUP_LEN - 1];
      osi_free_and_reset((void**)&p_remote_rsp->p_data);
    }
    BTIF_TRACE_DEBUG("%s: vendor_id: %d status: %s", __func__, vendor_id,
                     status);

    release_transaction(p_remote_rsp->label);
    HAL_CBACK(bt_rc_ctrl_callbacks, groupnavigation_rsp_cb, vendor_id,
              key_state);
  } else {
    BTIF_TRACE_ERROR("%s: Remote does not support AVRCP TG role", __func__);
  }
}

/***************************************************************************
 *  Function       handle_rc_metamsg_cmd
 *
 *  - Argument:    tBTA_AV_VENDOR Structure containing the received
 *                          metamsg command
 *
 *  - Description: Remote control metamsg command handler (AVRCP 1.3)
 *
 ***************************************************************************/
void handle_rc_metamsg_cmd(tBTA_AV_META_MSG* pmeta_msg) {
  /* Parse the metamsg command and pass it on to BTL-IFS */
  uint8_t scratch_buf[512] = {0};
  tAVRC_COMMAND avrc_command = {0};
  tAVRC_STS status;
  btif_rc_device_cb_t* p_dev = NULL;

  if (NULL == pmeta_msg) {
    BTIF_TRACE_EVENT("%s: Exiting as pmeta_msg is NULL", __func__);
    return;
  }

  if (NULL == pmeta_msg->p_msg) {
    BTIF_TRACE_EVENT("%s: Exiting as pmeta_msg->p_msg is NULL", __func__);
    return;
  }

  BTIF_TRACE_EVENT("%s: pmeta_msg: opcode: %x, code: %x", __func__,
                   pmeta_msg->p_msg->hdr.opcode, pmeta_msg->code);

  p_dev = btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: Meta msg event for Invalid rc handle", __func__);
    return;
  }

  if (pmeta_msg->p_msg->hdr.opcode != AVRC_OP_VENDOR &&
      pmeta_msg->p_msg->hdr.opcode != AVRC_OP_BROWSE) {
    BTIF_TRACE_WARNING("Invalid opcode: %x", pmeta_msg->p_msg->hdr.opcode);
    return;
  }

  if (pmeta_msg->len < 3) {
    BTIF_TRACE_WARNING("%s: Invalid length. opcode: 0x%x, len: 0x%x", __func__,
                       pmeta_msg->p_msg->hdr.opcode, pmeta_msg->len);
    return;
  }

  if (pmeta_msg->code >= AVRC_RSP_NOT_IMPL) {
    {
      rc_transaction_t* transaction = NULL;
      transaction = get_transaction_by_lbl(pmeta_msg->label);
      if (transaction != NULL) {
        handle_rc_metamsg_rsp(pmeta_msg, p_dev);
      } else {
        BTIF_TRACE_DEBUG(
            "%s: Discard vendor dependent rsp. code: %d label: %d.", __func__,
            pmeta_msg->code, pmeta_msg->label);
      }
      return;
    }
  }

  status = AVRC_ParsCommand(pmeta_msg->p_msg, &avrc_command, scratch_buf,
                            sizeof(scratch_buf));
  BTIF_TRACE_DEBUG("%s: Received vendor command.code,PDU and label: %d, %d, %d",
                   __func__, pmeta_msg->code, avrc_command.cmd.pdu,
                   pmeta_msg->label);

  if (status != AVRC_STS_NO_ERROR) {
    /* return error */
    BTIF_TRACE_WARNING(
        "%s: Error in parsing received metamsg command. status: 0x%02x",
        __func__, status);
    send_reject_response(pmeta_msg->rc_handle, pmeta_msg->label,
                         avrc_command.pdu, status,
                         pmeta_msg->p_msg->hdr.opcode);
  } else {
    /* if RegisterNotification, add it to our registered queue */

    if (avrc_command.cmd.pdu == AVRC_PDU_REGISTER_NOTIFICATION) {
      uint8_t event_id = avrc_command.reg_notif.event_id;

      BTIF_TRACE_EVENT(
          "%s: New register notification received.event_id: %s, label: 0x%x, "
          "code: %x",
          __func__, dump_rc_notification_event_id(event_id), pmeta_msg->label,
          pmeta_msg->code);
      p_dev->rc_notif[event_id - 1].bNotify = true;
      p_dev->rc_notif[event_id - 1].label = pmeta_msg->label;
    }

    BTIF_TRACE_EVENT("%s: Passing received metamsg command to app. pdu: %s",
                     __func__, dump_rc_pdu(avrc_command.cmd.pdu));

    /* Since handle_rc_metamsg_cmd() itself is called from
        *btif context, no context switching is required. Invoke
        * btif_rc_upstreams_evt directly from here. */
    btif_rc_upstreams_evt((uint16_t)avrc_command.cmd.pdu, &avrc_command,
                          pmeta_msg->code, pmeta_msg->label, p_dev);
  }
}

/***************************************************************************
 **
 ** Function       btif_rc_handler
 **
 ** Description    RC event handler
 **
 ***************************************************************************/
void btif_rc_handler(tBTA_AV_EVT event, tBTA_AV* p_data) {
  BTIF_TRACE_DEBUG("%s: event: %s", __func__, dump_rc_event(event));
  btif_rc_device_cb_t* p_dev = NULL;
  switch (event) {
    case BTA_AV_RC_OPEN_EVT: {
      BTIF_TRACE_DEBUG("%s: Peer_features: %x", __func__,
                       p_data->rc_open.peer_features);
      handle_rc_connect(&(p_data->rc_open));
    } break;

    case BTA_AV_RC_BROWSE_OPEN_EVT: {
      /* tell the UL that we have connection to browse channel and that
       * browse commands can be directed accordingly. */
      handle_rc_browse_connect(&p_data->rc_browse_open);
    } break;

    case BTA_AV_RC_CLOSE_EVT: {
      handle_rc_disconnect(&(p_data->rc_close));
    } break;

    case BTA_AV_RC_BROWSE_CLOSE_EVT: {
      BTIF_TRACE_DEBUG("%s: BTA_AV_RC_BROWSE_CLOSE_EVT", __func__);
    } break;

    case BTA_AV_REMOTE_CMD_EVT: {
      if (bt_rc_callbacks != NULL) {
        BTIF_TRACE_DEBUG("%s: rc_id: 0x%x key_state: %d", __func__,
                         p_data->remote_cmd.rc_id,
                         p_data->remote_cmd.key_state);
        handle_rc_passthrough_cmd((&p_data->remote_cmd));
      } else {
        BTIF_TRACE_ERROR("%s: AVRCP TG role not up, drop passthrough commands",
                         __func__);
      }
    } break;

    case BTA_AV_REMOTE_RSP_EVT: {
      BTIF_TRACE_DEBUG("%s: RSP: rc_id: 0x%x key_state: %d", __func__,
                       p_data->remote_rsp.rc_id, p_data->remote_rsp.key_state);

      if (p_data->remote_rsp.rc_id == AVRC_ID_VENDOR) {
        handle_rc_vendorunique_rsp((&p_data->remote_rsp));
      } else {
        handle_rc_passthrough_rsp((&p_data->remote_rsp));
      }
    } break;

    case BTA_AV_RC_FEAT_EVT: {
      BTIF_TRACE_DEBUG("%s: Peer_features: %x", __func__,
                       p_data->rc_feat.peer_features);
      p_dev = btif_rc_get_device_by_handle(p_data->rc_feat.rc_handle);
      if (p_dev == NULL) {
        BTIF_TRACE_ERROR("%s: RC Feature event for Invalid rc handle",
                         __func__);
        break;
      }

      p_dev->rc_features = p_data->rc_feat.peer_features;
      if (bt_rc_callbacks != NULL) {
        handle_rc_features(p_dev);
      }

      if ((p_dev->rc_connected) && (bt_rc_ctrl_callbacks != NULL)) {
        handle_rc_ctrl_features(p_dev);
      }
    } break;

    case BTA_AV_META_MSG_EVT: {
      if (bt_rc_callbacks != NULL) {
        BTIF_TRACE_DEBUG("%s: BTA_AV_META_MSG_EVT code: %d label: %d", __func__,
                         p_data->meta_msg.code, p_data->meta_msg.label);
        BTIF_TRACE_DEBUG("%s: company_id: 0x%x len: %d handle: %d", __func__,
                         p_data->meta_msg.company_id, p_data->meta_msg.len,
                         p_data->meta_msg.rc_handle);

        /* handle the metamsg command */
        handle_rc_metamsg_cmd(&(p_data->meta_msg));

        /* Free the Memory allocated for tAVRC_MSG */
      } else if (bt_rc_ctrl_callbacks != NULL) {
        /* This is case of Sink + CT + TG(for abs vol)) */
        BTIF_TRACE_DEBUG(
            "%s BTA_AV_META_MSG_EVT code:%d label:%d opcode %d ctype %d",
            __func__, p_data->meta_msg.code, p_data->meta_msg.label,
            p_data->meta_msg.p_msg->hdr.opcode,
            p_data->meta_msg.p_msg->hdr.ctype);
        BTIF_TRACE_DEBUG("%s company_id:0x%x len:%d handle:%d", __func__,
                         p_data->meta_msg.company_id, p_data->meta_msg.len,
                         p_data->meta_msg.rc_handle);
        switch (p_data->meta_msg.p_msg->hdr.opcode) {
          case AVRC_OP_VENDOR:
            if ((p_data->meta_msg.code >= AVRC_RSP_NOT_IMPL) &&
                (p_data->meta_msg.code <= AVRC_RSP_INTERIM)) {
              /* Its a response */
              handle_avk_rc_metamsg_rsp(&(p_data->meta_msg));
            } else if (p_data->meta_msg.code <= AVRC_CMD_GEN_INQ) {
              /* Its a command  */
              handle_avk_rc_metamsg_cmd(&(p_data->meta_msg));
            }
            break;

          case AVRC_OP_BROWSE:
            if (p_data->meta_msg.p_msg->hdr.ctype == AVRC_CMD) {
              handle_avk_rc_metamsg_cmd(&(p_data->meta_msg));
            } else if (p_data->meta_msg.p_msg->hdr.ctype == AVRC_RSP) {
              handle_avk_rc_metamsg_rsp(&(p_data->meta_msg));
            }
            break;
        }
      } else {
        BTIF_TRACE_ERROR("Neither CTRL, nor TG is up, drop meta commands");
      }
    } break;

    default:
      BTIF_TRACE_DEBUG("%s: Unhandled RC event : 0x%x", __func__, event);
  }
}

/***************************************************************************
 **
 ** Function       btif_rc_get_connected_peer
 **
 ** Description    Fetches the connected headset's address if any
 **
 ***************************************************************************/
bool btif_rc_get_connected_peer(RawAddress* peer_addr) {
  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    btif_rc_device_cb_t* p_dev = get_connected_device(idx);
    if (p_dev != NULL && (p_dev->rc_connected == TRUE)) {
      *peer_addr = p_dev->rc_addr;
      return true;
    }
  }
  return false;
}

/***************************************************************************
 **
 ** Function       btif_rc_get_connected_peer_handle
 **
 ** Description    Fetches the connected headset's handle if any
 **
 ***************************************************************************/
uint8_t btif_rc_get_connected_peer_handle(const RawAddress& peer_addr) {
  btif_rc_device_cb_t* p_dev = NULL;
  p_dev = btif_rc_get_device_by_bda(&peer_addr);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return BTRC_HANDLE_NONE;
  }
  return p_dev->rc_handle;
}

/***************************************************************************
 **
 ** Function       btif_rc_check_handle_pending_play
 **
 ** Description    Clears the queued PLAY command. if |bSendToApp| is true,
 **                forwards to app
 **
 ***************************************************************************/

/* clear the queued PLAY command. if |bSendToApp| is true, forward to app */
void btif_rc_check_handle_pending_play(const RawAddress& peer_addr,
                                       bool bSendToApp) {
  btif_rc_device_cb_t* p_dev = NULL;
  p_dev = btif_rc_get_device_by_bda(&peer_addr);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  BTIF_TRACE_DEBUG("%s: bSendToApp: %d", __func__, bSendToApp);
  if (p_dev->rc_pending_play) {
    if (bSendToApp) {
      tBTA_AV_REMOTE_CMD remote_cmd;
      APPL_TRACE_DEBUG("%s: Sending queued PLAYED event to app", __func__);

      memset(&remote_cmd, 0, sizeof(tBTA_AV_REMOTE_CMD));
      remote_cmd.rc_handle = p_dev->rc_handle;
      remote_cmd.rc_id = AVRC_ID_PLAY;
      remote_cmd.hdr.ctype = AVRC_CMD_CTRL;
      remote_cmd.hdr.opcode = AVRC_OP_PASS_THRU;

      /* delay sending to app, else there is a timing issue in the framework,
       ** which causes the audio to be on th device's speaker. Delay between
       ** OPEN & RC_PLAYs
      */
      sleep_ms(200);
      /* send to app - both PRESSED & RELEASED */
      remote_cmd.key_state = AVRC_STATE_PRESS;
      handle_rc_passthrough_cmd(&remote_cmd);

      sleep_ms(100);

      remote_cmd.key_state = AVRC_STATE_RELEASE;
      handle_rc_passthrough_cmd(&remote_cmd);
    }
    p_dev->rc_pending_play = false;
  }
}

/* Generic reject response */
static void send_reject_response(uint8_t rc_handle, uint8_t label, uint8_t pdu,
                                 uint8_t status, uint8_t opcode) {
  uint8_t ctype = AVRC_RSP_REJ;
  tAVRC_RESPONSE avrc_rsp;
  BT_HDR* p_msg = NULL;
  memset(&avrc_rsp, 0, sizeof(tAVRC_RESPONSE));

  avrc_rsp.rsp.opcode = opcode;
  avrc_rsp.rsp.pdu = pdu;
  avrc_rsp.rsp.status = status;

  status = AVRC_BldResponse(rc_handle, &avrc_rsp, &p_msg);

  if (status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s: status not AVRC_STS_NO_ERROR", __func__);
    return;
  }

  BTIF_TRACE_DEBUG(
      "%s: Sending error notification to handle: %d. pdu: %s,status: 0x%02x",
      __func__, rc_handle, dump_rc_pdu(pdu), status);
  BTA_AvMetaRsp(rc_handle, label, ctype, p_msg);
}

/***************************************************************************
 *  Function         get_rsp_type_code
 *
 *  - Argument:   status
 *  - Description: Returns response type codes for particular command code and
 *                 status.
 *
 ***************************************************************************/
static tBTA_AV_CODE get_rsp_type_code(tAVRC_STS status, tBTA_AV_CODE code) {
  if (status != AVRC_STS_NO_ERROR) {
    return AVRC_RSP_REJ;
  }

  if (code < AVRC_RSP_NOT_IMPL) {
    if (code == AVRC_CMD_NOTIF) return AVRC_RSP_INTERIM;

    if (code == AVRC_CMD_STATUS) return AVRC_RSP_IMPL_STBL;

    return AVRC_RSP_ACCEPT;
  }

  return code;
}

/***************************************************************************
 *  Function       send_metamsg_rsp
 *
 *  - Argument:
 *                  p_dev           Dev pointer
 *                  index           Command index (= -1 if not used)
 *                  label           Label of the RC response
 *                  code            Response type
 *                  pmetamsg_resp   Vendor response
 *
 *  - Description: Remote control metamsg response handler
 *
 ***************************************************************************/
static void send_metamsg_rsp(btif_rc_device_cb_t* p_dev, int index,
                             uint8_t label, tBTA_AV_CODE code,
                             tAVRC_RESPONSE* pmetamsg_resp) {
  uint8_t ctype;

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  if (pmetamsg_resp == NULL) {
    BTIF_TRACE_WARNING("%s: Invalid response received from application",
                       __func__);
    return;
  }

  BTIF_TRACE_EVENT(
      "%s: rc_handle: %d, index: %d, label: %d, code: 0x%02x, pdu: %s",
      __func__, p_dev->rc_handle, index, label, code,
      dump_rc_pdu(pmetamsg_resp->rsp.pdu));

  if (index >= 0 && p_dev->rc_pdu_info[index].is_rsp_pending == false) {
    BTIF_TRACE_ERROR("%s: is_rsp_pending false, returning", __func__);
    return;
  }

  ctype = get_rsp_type_code(pmetamsg_resp->rsp.status, code);

  /* if response is for register_notification, make sure the rc has
  actually registered for this */
  if ((pmetamsg_resp->rsp.pdu == AVRC_PDU_REGISTER_NOTIFICATION) &&
      ((code == AVRC_RSP_CHANGED) || (code == AVRC_RSP_INTERIM))) {
    bool bSent = false;
    uint8_t event_id = pmetamsg_resp->reg_notif.event_id;
    bool bNotify =
        (p_dev->rc_connected) && (p_dev->rc_notif[event_id - 1].bNotify);

    /* de-register this notification for a CHANGED response */
    p_dev->rc_notif[event_id - 1].bNotify = false;
    BTIF_TRACE_DEBUG("%s: rc_handle: %d. event_id: 0x%02d bNotify: %u",
                     __func__, p_dev->rc_handle, event_id, bNotify);
    if (bNotify) {
      BT_HDR* p_msg = NULL;
      tAVRC_STS status;

      if (AVRC_STS_NO_ERROR == (status = AVRC_BldResponse(
                                    p_dev->rc_handle, pmetamsg_resp, &p_msg))) {
        BTIF_TRACE_DEBUG(
            "%s: Sending notification to rc_handle: %d. event_id: 0x%02d",
            __func__, p_dev->rc_handle, event_id);
        bSent = true;
        BTA_AvMetaRsp(p_dev->rc_handle, p_dev->rc_notif[event_id - 1].label,
                      ctype, p_msg);
      } else {
        BTIF_TRACE_WARNING(
            "%s: failed to build metamsg response. status: 0x%02x", __func__,
            status);
      }
    }

    if (!bSent) {
      BTIF_TRACE_DEBUG(
          "%s: Notification not sent, as there are no RC connections or the \
                CT has not subscribed for event_id: %s",
          __func__, dump_rc_notification_event_id(event_id));
    }
  } else {
    /* All other commands go here */

    BT_HDR* p_msg = NULL;
    tAVRC_STS status;

    status = AVRC_BldResponse(p_dev->rc_handle, pmetamsg_resp, &p_msg);

    if (status == AVRC_STS_NO_ERROR) {
      BTA_AvMetaRsp(p_dev->rc_handle, label, ctype, p_msg);
    } else {
      BTIF_TRACE_ERROR("%s: failed to build metamsg response. status: 0x%02x",
                       __func__, status);
    }
  }

  if (index >= 0) {
    p_dev->rc_pdu_info[index].ctype = 0;
    p_dev->rc_pdu_info[index].label = 0;
    p_dev->rc_pdu_info[index].is_rsp_pending = false;
  }
}

static uint8_t opcode_from_pdu(uint8_t pdu) {
  uint8_t opcode = 0;

  switch (pdu) {
    case AVRC_PDU_SET_BROWSED_PLAYER:
    case AVRC_PDU_GET_FOLDER_ITEMS:
    case AVRC_PDU_CHANGE_PATH:
    case AVRC_PDU_GET_ITEM_ATTRIBUTES:
    case AVRC_PDU_ADD_TO_NOW_PLAYING:
    case AVRC_PDU_SEARCH:
    case AVRC_PDU_GET_TOTAL_NUM_OF_ITEMS:
    case AVRC_PDU_GENERAL_REJECT:
      opcode = AVRC_OP_BROWSE;
      break;

    case AVRC_PDU_NEXT_GROUP:
    case AVRC_PDU_PREV_GROUP: /* pass thru */
      opcode = AVRC_OP_PASS_THRU;
      break;

    default: /* vendor */
      opcode = AVRC_OP_VENDOR;
      break;
  }

  return opcode;
}

/***************************************************************************
 * Function:  fill_attribute_id_array
 *
 * - Argument:
 *     cmd_attribute_number         input attribute number from AVRCP command
 *     cmd_attribute_id_array       input attribute list from AVRCP command
 *     out_array_size               allocated size of out attribute id array
 *     out_attribute_id_array       output attribute list resolved here
 *
 * - Description:
 *     Resolve attribute id array as defined by the AVRCP specification.
 *
 * - Returns:
 *     The number of attributes filled in
 *
 ***************************************************************************/
static uint8_t fill_attribute_id_array(
    uint8_t cmd_attribute_number, btrc_media_attr_t* cmd_attribute_id_array,
    size_t out_array_size, btrc_media_attr_t* out_attribute_id_array) {
  /* Reset attribute array */
  memset(out_attribute_id_array, 0, out_array_size);
  /* Default case for cmd_attribute_number == 0xFF, No attribute */
  uint8_t out_attribute_number = 0;
  if (cmd_attribute_number == 0) {
    /* All attributes */
    out_attribute_number = out_array_size < AVRC_MAX_NUM_MEDIA_ATTR_ID
                               ? out_array_size
                               : AVRC_MAX_NUM_MEDIA_ATTR_ID;
    for (int i = 0; i < out_attribute_number; i++) {
      out_attribute_id_array[i] = (btrc_media_attr_t)(i + 1);
    }
  } else if (cmd_attribute_number != 0xFF) {
    /* Attribute List */
    out_attribute_number = 0;
    int filled_id_count = 0;
    for (int i = 0; (i < cmd_attribute_number) &&
                    (out_attribute_number < out_array_size) &&
                    (out_attribute_number < AVRC_MAX_NUM_MEDIA_ATTR_ID);
         i++) {
      /* Fill only valid entries */
      if (AVRC_IS_VALID_MEDIA_ATTRIBUTE(cmd_attribute_id_array[i])) {
        /* Skip the duplicate entries */
        for (filled_id_count = 0; filled_id_count < out_attribute_number;
             filled_id_count++) {
          if (out_attribute_id_array[filled_id_count] ==
              cmd_attribute_id_array[i])
            break;
        }
        /* New ID */
        if (filled_id_count == out_attribute_number) {
          out_attribute_id_array[out_attribute_number] =
              (btrc_media_attr_t)cmd_attribute_id_array[i];
          out_attribute_number++;
        }
      }
    }
  }
  return out_attribute_number;
}

/*******************************************************************************
 *
 * Function         btif_rc_upstreams_evt
 *
 * Description      Executes AVRC UPSTREAMS events in btif context.
 *
 * Returns          void
 *
 ******************************************************************************/
static void btif_rc_upstreams_evt(uint16_t event, tAVRC_COMMAND* pavrc_cmd,
                                  uint8_t ctype, uint8_t label,
                                  btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_EVENT("%s: pdu: %s handle: 0x%x ctype: %x label: %x event ID: %x",
                   __func__, dump_rc_pdu(pavrc_cmd->pdu), p_dev->rc_handle,
                   ctype, label, pavrc_cmd->reg_notif.event_id);
  RawAddress rc_addr = p_dev->rc_addr;

  switch (event) {
    case AVRC_PDU_GET_PLAY_STATUS: {
      fill_pdu_queue(IDX_GET_PLAY_STATUS_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, get_play_status_cb, &rc_addr);
    } break;
    case AVRC_PDU_LIST_PLAYER_APP_ATTR:
    case AVRC_PDU_LIST_PLAYER_APP_VALUES:
    case AVRC_PDU_GET_CUR_PLAYER_APP_VALUE:
    case AVRC_PDU_SET_PLAYER_APP_VALUE:
    case AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT:
    case AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT: {
      /* TODO: Add support for Application Settings */
      send_reject_response(p_dev->rc_handle, label, pavrc_cmd->pdu,
                           AVRC_STS_BAD_CMD, pavrc_cmd->cmd.opcode);
    } break;
    case AVRC_PDU_GET_ELEMENT_ATTR: {
      btrc_media_attr_t element_attrs[BTRC_MAX_ELEM_ATTR_SIZE];
      uint8_t num_attr = fill_attribute_id_array(
          pavrc_cmd->get_elem_attrs.num_attr,
          (btrc_media_attr_t*)pavrc_cmd->get_elem_attrs.attrs,
          BTRC_MAX_ELEM_ATTR_SIZE, element_attrs);
      if (num_attr == 0) {
        BTIF_TRACE_ERROR(
            "%s: No valid attributes requested in GET_ELEMENT_ATTRIBUTES",
            __func__);
        send_reject_response(p_dev->rc_handle, label, pavrc_cmd->pdu,
                             AVRC_STS_BAD_PARAM, pavrc_cmd->cmd.opcode);
        return;
      }
      fill_pdu_queue(IDX_GET_ELEMENT_ATTR_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, get_element_attr_cb, num_attr, element_attrs,
                &rc_addr);
    } break;
    case AVRC_PDU_REGISTER_NOTIFICATION: {
      if (pavrc_cmd->reg_notif.event_id == BTRC_EVT_PLAY_POS_CHANGED &&
          pavrc_cmd->reg_notif.param == 0) {
        BTIF_TRACE_WARNING(
            "%s: Device registering position changed with illegal param 0.",
            __func__);
        send_reject_response(p_dev->rc_handle, label, pavrc_cmd->pdu,
                             AVRC_STS_BAD_PARAM, pavrc_cmd->cmd.opcode);
        /* de-register this notification for a rejected response */
        p_dev->rc_notif[BTRC_EVT_PLAY_POS_CHANGED - 1].bNotify = false;
        return;
      }
      HAL_CBACK(bt_rc_callbacks, register_notification_cb,
                (btrc_event_id_t)pavrc_cmd->reg_notif.event_id,
                pavrc_cmd->reg_notif.param, &rc_addr);
    } break;
    case AVRC_PDU_INFORM_DISPLAY_CHARSET: {
      tAVRC_RESPONSE avrc_rsp;
      BTIF_TRACE_EVENT("%s: AVRC_PDU_INFORM_DISPLAY_CHARSET", __func__);
      if (p_dev->rc_connected == true) {
        memset(&(avrc_rsp.inform_charset), 0, sizeof(tAVRC_RSP));
        avrc_rsp.inform_charset.opcode =
            opcode_from_pdu(AVRC_PDU_INFORM_DISPLAY_CHARSET);
        avrc_rsp.inform_charset.pdu = AVRC_PDU_INFORM_DISPLAY_CHARSET;
        avrc_rsp.inform_charset.status = AVRC_STS_NO_ERROR;
        send_metamsg_rsp(p_dev, -1, label, ctype, &avrc_rsp);
      }
    } break;

    case AVRC_PDU_GET_FOLDER_ITEMS: {
      uint32_t attr_ids[BTRC_MAX_ELEM_ATTR_SIZE];
      uint8_t num_attr;
      num_attr = pavrc_cmd->get_items.attr_count;

      BTIF_TRACE_EVENT(
          "%s: AVRC_PDU_GET_FOLDER_ITEMS num_attr: %d, start_item [%d] \
                end_item [%d]",
          __func__, num_attr, pavrc_cmd->get_items.start_item,
          pavrc_cmd->get_items.end_item);

      /* num_attr requested:
       *     0x00: All attributes requested
       *     0xFF: No Attributes requested
       *     0x01 to 0x07: Specified number of attributes
       */
      if ((num_attr != 0xFF && num_attr > BTRC_MAX_ELEM_ATTR_SIZE)) {
        send_reject_response(p_dev->rc_handle, label, pavrc_cmd->pdu,
                             AVRC_STS_BAD_PARAM, pavrc_cmd->cmd.opcode);
        return;
      }

      /* Except num_attr is None(0xff) / All(0x00), request follows with an
       * Attribute List */
      if ((num_attr != 0xFF) && (num_attr != 0x00)) {
        memcpy(attr_ids, pavrc_cmd->get_items.p_attr_list,
               sizeof(uint32_t) * num_attr);
      }

      fill_pdu_queue(IDX_GET_FOLDER_ITEMS_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, get_folder_items_cb,
                pavrc_cmd->get_items.scope, pavrc_cmd->get_items.start_item,
                pavrc_cmd->get_items.end_item, num_attr, attr_ids, &rc_addr);
    } break;

    case AVRC_PDU_SET_ADDRESSED_PLAYER: {
      fill_pdu_queue(IDX_SET_ADDR_PLAYER_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, set_addressed_player_cb,
                pavrc_cmd->addr_player.player_id, &rc_addr);
    } break;

    case AVRC_PDU_SET_BROWSED_PLAYER: {
      fill_pdu_queue(IDX_SET_BROWSED_PLAYER_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, set_browsed_player_cb,
                pavrc_cmd->br_player.player_id, &rc_addr);
    } break;

    case AVRC_PDU_REQUEST_CONTINUATION_RSP: {
      BTIF_TRACE_EVENT("%s() REQUEST CONTINUATION: target_pdu: 0x%02d",
                       __func__, pavrc_cmd->continu.target_pdu);
      tAVRC_RESPONSE avrc_rsp;
      if (p_dev->rc_connected == TRUE) {
        memset(&(avrc_rsp.continu), 0, sizeof(tAVRC_NEXT_RSP));
        avrc_rsp.continu.opcode =
            opcode_from_pdu(AVRC_PDU_REQUEST_CONTINUATION_RSP);
        avrc_rsp.continu.pdu = AVRC_PDU_REQUEST_CONTINUATION_RSP;
        avrc_rsp.continu.status = AVRC_STS_NO_ERROR;
        avrc_rsp.continu.target_pdu = pavrc_cmd->continu.target_pdu;
        send_metamsg_rsp(p_dev, -1, label, ctype, &avrc_rsp);
      }
    } break;

    case AVRC_PDU_ABORT_CONTINUATION_RSP: {
      BTIF_TRACE_EVENT("%s() ABORT CONTINUATION: target_pdu: 0x%02d", __func__,
                       pavrc_cmd->abort.target_pdu);
      tAVRC_RESPONSE avrc_rsp;
      if (p_dev->rc_connected == TRUE) {
        memset(&(avrc_rsp.abort), 0, sizeof(tAVRC_NEXT_RSP));
        avrc_rsp.abort.opcode =
            opcode_from_pdu(AVRC_PDU_ABORT_CONTINUATION_RSP);
        avrc_rsp.abort.pdu = AVRC_PDU_ABORT_CONTINUATION_RSP;
        avrc_rsp.abort.status = AVRC_STS_NO_ERROR;
        avrc_rsp.abort.target_pdu = pavrc_cmd->continu.target_pdu;
        send_metamsg_rsp(p_dev, -1, label, ctype, &avrc_rsp);
      }
    } break;

    case AVRC_PDU_CHANGE_PATH: {
      fill_pdu_queue(IDX_CHG_PATH_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, change_path_cb, pavrc_cmd->chg_path.direction,
                pavrc_cmd->chg_path.folder_uid, &rc_addr);
    } break;

    case AVRC_PDU_SEARCH: {
      fill_pdu_queue(IDX_SEARCH_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, search_cb, pavrc_cmd->search.string.charset_id,
                pavrc_cmd->search.string.str_len,
                pavrc_cmd->search.string.p_str, &rc_addr);
    } break;

    case AVRC_PDU_GET_ITEM_ATTRIBUTES: {
      btrc_media_attr_t item_attrs[BTRC_MAX_ELEM_ATTR_SIZE];
      uint8_t num_attr = fill_attribute_id_array(
          pavrc_cmd->get_attrs.attr_count,
          (btrc_media_attr_t*)pavrc_cmd->get_attrs.p_attr_list,
          BTRC_MAX_ELEM_ATTR_SIZE, item_attrs);
      if (num_attr == 0) {
        BTIF_TRACE_ERROR(
            "%s: No valid attributes requested in GET_ITEM_ATTRIBUTES",
            __func__);
        send_reject_response(p_dev->rc_handle, label, pavrc_cmd->pdu,
                             AVRC_STS_BAD_PARAM, pavrc_cmd->cmd.opcode);
        return;
      }
      fill_pdu_queue(IDX_GET_ITEM_ATTR_RSP, ctype, label, true, p_dev);
      BTIF_TRACE_DEBUG("%s: GET_ITEM_ATTRIBUTES: num_attr: %d", __func__,
                       num_attr);
      HAL_CBACK(bt_rc_callbacks, get_item_attr_cb, pavrc_cmd->get_attrs.scope,
                pavrc_cmd->get_attrs.uid, pavrc_cmd->get_attrs.uid_counter,
                num_attr, item_attrs, &rc_addr);
    } break;

    case AVRC_PDU_GET_TOTAL_NUM_OF_ITEMS: {
      fill_pdu_queue(IDX_GET_TOTAL_NUM_OF_ITEMS_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, get_total_num_of_items_cb,
                pavrc_cmd->get_num_of_items.scope, &rc_addr);
    } break;

    case AVRC_PDU_ADD_TO_NOW_PLAYING: {
      fill_pdu_queue(IDX_ADD_TO_NOW_PLAYING_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, add_to_now_playing_cb,
                pavrc_cmd->add_to_play.scope, pavrc_cmd->add_to_play.uid,
                pavrc_cmd->add_to_play.uid_counter, &rc_addr);
    } break;

    case AVRC_PDU_PLAY_ITEM: {
      fill_pdu_queue(IDX_PLAY_ITEM_RSP, ctype, label, true, p_dev);
      HAL_CBACK(bt_rc_callbacks, play_item_cb, pavrc_cmd->play_item.scope,
                pavrc_cmd->play_item.uid_counter, pavrc_cmd->play_item.uid,
                &rc_addr);
    } break;

    default: {
      send_reject_response(p_dev->rc_handle, label, pavrc_cmd->pdu,
                           AVRC_STS_BAD_CMD, pavrc_cmd->cmd.opcode);
      return;
    } break;
  }
}

/*******************************************************************************
 *
 * Function         btif_rc_ctrl_upstreams_rsp_cmd
 *
 * Description      Executes AVRC UPSTREAMS response events in btif context.
 *
 * Returns          void
 *
 ******************************************************************************/
static void btif_rc_ctrl_upstreams_rsp_cmd(uint8_t event,
                                           tAVRC_COMMAND* pavrc_cmd,
                                           uint8_t label,
                                           btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: pdu: %s: handle: 0x%x", __func__,
                   dump_rc_pdu(pavrc_cmd->pdu), p_dev->rc_handle);
  RawAddress rc_addr = p_dev->rc_addr;
  switch (event) {
    case AVRC_PDU_SET_ABSOLUTE_VOLUME:
      HAL_CBACK(bt_rc_ctrl_callbacks, setabsvol_cmd_cb, &rc_addr,
                pavrc_cmd->volume.volume, label);
      break;
    case AVRC_PDU_REGISTER_NOTIFICATION:
      if (pavrc_cmd->reg_notif.event_id == AVRC_EVT_VOLUME_CHANGE) {
        HAL_CBACK(bt_rc_ctrl_callbacks, registernotification_absvol_cb,
                  &rc_addr, label);
      }
      break;
  }
}

/*******************************************************************************
 *
 * Function         btif_rc_upstreams_rsp_evt
 *
 * Description      Executes AVRC UPSTREAMS response events in btif context.
 *
 * Returns          void
 *
 ******************************************************************************/
static void btif_rc_upstreams_rsp_evt(uint16_t event,
                                      tAVRC_RESPONSE* pavrc_resp, uint8_t ctype,
                                      uint8_t label,
                                      btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_EVENT("%s: pdu: %s: handle: 0x%x ctype: %x label: %x", __func__,
                   dump_rc_pdu(pavrc_resp->pdu), p_dev->rc_handle, ctype,
                   label);
  RawAddress rc_addr = p_dev->rc_addr;

  switch (event) {
    case AVRC_PDU_REGISTER_NOTIFICATION: {
      if (AVRC_RSP_CHANGED == ctype)
        p_dev->rc_volume = pavrc_resp->reg_notif.param.volume;
      HAL_CBACK(bt_rc_callbacks, volume_change_cb,
                pavrc_resp->reg_notif.param.volume, ctype, &rc_addr);
    } break;

    case AVRC_PDU_SET_ABSOLUTE_VOLUME: {
      BTIF_TRACE_DEBUG(
          "%s: Set absolute volume change event received: volume: %d, ctype: "
          "%d",
          __func__, pavrc_resp->volume.volume, ctype);
      if (AVRC_RSP_ACCEPT == ctype)
        p_dev->rc_volume = pavrc_resp->volume.volume;
      HAL_CBACK(bt_rc_callbacks, volume_change_cb, pavrc_resp->volume.volume,
                ctype, &rc_addr);
    } break;

    default:
      return;
  }
}

/*******************************************************************************
 *  AVRCP API Functions
 ******************************************************************************/

/*******************************************************************************
 *
 * Function         init
 *
 * Description      Initializes the AVRC interface
 *
 * Returns          bt_status_t
 *
 ******************************************************************************/
static bt_status_t init(btrc_callbacks_t* callbacks) {
  BTIF_TRACE_EVENT("%s: ", __func__);
  bt_status_t result = BT_STATUS_SUCCESS;

  if (bt_rc_callbacks) return BT_STATUS_DONE;

  bt_rc_callbacks = callbacks;
  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    memset(&btif_rc_cb.rc_multi_cb[idx], 0,
           sizeof(btif_rc_cb.rc_multi_cb[idx]));
    btif_rc_cb.rc_multi_cb[idx].rc_vol_label = MAX_LABEL;
    btif_rc_cb.rc_multi_cb[idx].rc_volume = MAX_VOLUME;
    btif_rc_cb.rc_multi_cb[idx].rc_state = BTRC_CONNECTION_STATE_DISCONNECTED;
  }
  lbl_init();

  return result;
}

/*******************************************************************************
 *
 * Function         init_ctrl
 *
 * Description      Initializes the AVRC interface
 *
 * Returns          bt_status_t
 *
 ******************************************************************************/
static bt_status_t init_ctrl(btrc_ctrl_callbacks_t* callbacks) {
  BTIF_TRACE_EVENT("%s: ", __func__);
  bt_status_t result = BT_STATUS_SUCCESS;

  if (bt_rc_ctrl_callbacks) return BT_STATUS_DONE;

  bt_rc_ctrl_callbacks = callbacks;
  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    memset(&btif_rc_cb.rc_multi_cb[idx], 0,
           sizeof(btif_rc_cb.rc_multi_cb[idx]));
    btif_rc_cb.rc_multi_cb[idx].rc_vol_label = MAX_LABEL;
    btif_rc_cb.rc_multi_cb[idx].rc_volume = MAX_VOLUME;
  }
  lbl_init();

  return result;
}

static void rc_ctrl_procedure_complete(btif_rc_device_cb_t* p_dev) {
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  if (p_dev->rc_procedure_complete == true) {
    return;
  }
  p_dev->rc_procedure_complete = true;
  uint32_t attr_list[] = {
      AVRC_MEDIA_ATTR_ID_TITLE,       AVRC_MEDIA_ATTR_ID_ARTIST,
      AVRC_MEDIA_ATTR_ID_ALBUM,       AVRC_MEDIA_ATTR_ID_TRACK_NUM,
      AVRC_MEDIA_ATTR_ID_NUM_TRACKS,  AVRC_MEDIA_ATTR_ID_GENRE,
      AVRC_MEDIA_ATTR_ID_PLAYING_TIME};
  get_element_attribute_cmd(AVRC_MAX_NUM_MEDIA_ATTR_ID, attr_list, p_dev);
}

/***************************************************************************
 *
 * Function         get_play_status_rsp
 *
 * Description      Returns the current play status.
 *                      This method is called in response to
 *                      GetPlayStatus request.
 *
 * Returns          bt_status_t
 *
 **************************************************************************/
static bt_status_t get_play_status_rsp(RawAddress* bd_addr,
                                       btrc_play_status_t play_status,
                                       uint32_t song_len, uint32_t song_pos) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s: song len %d song pos %d", __func__, song_len, song_pos);
  CHECK_RC_CONNECTED(p_dev);

  memset(&(avrc_rsp.get_play_status), 0, sizeof(tAVRC_GET_PLAY_STATUS_RSP));

  avrc_rsp.get_play_status.song_len = song_len;
  avrc_rsp.get_play_status.song_pos = song_pos;
  avrc_rsp.get_play_status.play_status = play_status;

  avrc_rsp.get_play_status.pdu = AVRC_PDU_GET_PLAY_STATUS;
  avrc_rsp.get_play_status.opcode = opcode_from_pdu(AVRC_PDU_GET_PLAY_STATUS);
  avrc_rsp.get_play_status.status =
      ((play_status != BTRC_PLAYSTATE_ERROR) ? AVRC_STS_NO_ERROR
                                             : AVRC_STS_BAD_PARAM);

  /* Send the response */
  send_metamsg_rsp(p_dev, IDX_GET_PLAY_STATUS_RSP,
                   p_dev->rc_pdu_info[IDX_GET_PLAY_STATUS_RSP].label,
                   p_dev->rc_pdu_info[IDX_GET_PLAY_STATUS_RSP].ctype,
                   &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         get_element_attr_rsp
 *
 * Description      Returns the current songs' element attributes
 *                      in text.
 *
 * Returns          bt_status_t
 *
 **************************************************************************/
static bt_status_t get_element_attr_rsp(RawAddress* bd_addr, uint8_t num_attr,
                                        btrc_element_attr_val_t* p_attrs) {
  tAVRC_RESPONSE avrc_rsp;
  uint32_t i;
  tAVRC_ATTR_ENTRY element_attrs[BTRC_MAX_ELEM_ATTR_SIZE];
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  memset(element_attrs, 0, sizeof(tAVRC_ATTR_ENTRY) * num_attr);

  if (num_attr == 0) {
    avrc_rsp.get_play_status.status = AVRC_STS_BAD_PARAM;
  } else {
    for (i = 0; i < num_attr; i++) {
      element_attrs[i].attr_id = p_attrs[i].attr_id;
      element_attrs[i].name.charset_id = AVRC_CHARSET_ID_UTF8;
      element_attrs[i].name.str_len = (uint16_t)strlen((char*)p_attrs[i].text);
      element_attrs[i].name.p_str = p_attrs[i].text;
      BTIF_TRACE_DEBUG(
          "%s: attr_id: 0x%x, charset_id: 0x%x, str_len: %d, str: %s", __func__,
          (unsigned int)element_attrs[i].attr_id,
          element_attrs[i].name.charset_id, element_attrs[i].name.str_len,
          element_attrs[i].name.p_str);
    }
    avrc_rsp.get_play_status.status = AVRC_STS_NO_ERROR;
  }
  avrc_rsp.get_attrs.num_attrs = num_attr;
  avrc_rsp.get_attrs.p_attrs = element_attrs;
  avrc_rsp.get_attrs.pdu = AVRC_PDU_GET_ELEMENT_ATTR;
  avrc_rsp.get_attrs.opcode = opcode_from_pdu(AVRC_PDU_GET_ELEMENT_ATTR);

  /* Send the response */
  send_metamsg_rsp(p_dev, IDX_GET_ELEMENT_ATTR_RSP,
                   p_dev->rc_pdu_info[IDX_GET_ELEMENT_ATTR_RSP].label,
                   p_dev->rc_pdu_info[IDX_GET_ELEMENT_ATTR_RSP].ctype,
                   &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         register_notification_rsp
 *
 * Description      Response to the register notification request.
 *
 * Returns          bt_status_t
 *
 **************************************************************************/
static bt_status_t register_notification_rsp(
    btrc_event_id_t event_id, btrc_notification_type_t type,
    btrc_register_notification_t* p_param) {
  tAVRC_RESPONSE avrc_rsp;
  BTIF_TRACE_EVENT("%s: event_id: %s", __func__,
                   dump_rc_notification_event_id(event_id));
  std::unique_lock<std::mutex> lock(btif_rc_cb.lock);

  memset(&(avrc_rsp.reg_notif), 0, sizeof(tAVRC_REG_NOTIF_RSP));

  avrc_rsp.reg_notif.event_id = event_id;
  avrc_rsp.reg_notif.pdu = AVRC_PDU_REGISTER_NOTIFICATION;
  avrc_rsp.reg_notif.opcode = opcode_from_pdu(AVRC_PDU_REGISTER_NOTIFICATION);
  avrc_rsp.get_play_status.status = AVRC_STS_NO_ERROR;

  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    memset(&(avrc_rsp.reg_notif.param), 0, sizeof(tAVRC_NOTIF_RSP_PARAM));

    if (!(btif_rc_cb.rc_multi_cb[idx].rc_connected)) {
      BTIF_TRACE_ERROR("%s: Avrcp device is not connected, handle: 0x%x",
                       __func__, btif_rc_cb.rc_multi_cb[idx].rc_handle);
      continue;
    }

    if (btif_rc_cb.rc_multi_cb[idx].rc_notif[event_id - 1].bNotify == false) {
      BTIF_TRACE_WARNING(
          "%s: Avrcp Event id is not registered: event_id: %x, handle: 0x%x",
          __func__, event_id, btif_rc_cb.rc_multi_cb[idx].rc_handle);
      continue;
    }

    BTIF_TRACE_DEBUG(
        "%s: Avrcp Event id is registered: event_id: %x handle: 0x%x", __func__,
        event_id, btif_rc_cb.rc_multi_cb[idx].rc_handle);

    switch (event_id) {
      case BTRC_EVT_PLAY_STATUS_CHANGED:
        avrc_rsp.reg_notif.param.play_status = p_param->play_status;
        if (avrc_rsp.reg_notif.param.play_status == PLAY_STATUS_PLAYING)
          btif_av_clear_remote_suspend_flag();
        break;
      case BTRC_EVT_TRACK_CHANGE:
        memcpy(&(avrc_rsp.reg_notif.param.track), &(p_param->track),
               sizeof(btrc_uid_t));
        break;
      case BTRC_EVT_PLAY_POS_CHANGED:
        avrc_rsp.reg_notif.param.play_pos = p_param->song_pos;
        break;
      case BTRC_EVT_AVAL_PLAYER_CHANGE:
        break;
      case BTRC_EVT_ADDR_PLAYER_CHANGE:
        avrc_rsp.reg_notif.param.addr_player.player_id =
            p_param->addr_player_changed.player_id;
        avrc_rsp.reg_notif.param.addr_player.uid_counter =
            p_param->addr_player_changed.uid_counter;
        break;
      case BTRC_EVT_UIDS_CHANGED:
        avrc_rsp.reg_notif.param.uid_counter =
            p_param->uids_changed.uid_counter;
        break;
      case BTRC_EVT_NOW_PLAYING_CONTENT_CHANGED:
        break;

      default:
        BTIF_TRACE_WARNING("%s: Unhandled event ID: 0x%x", __func__, event_id);
        return BT_STATUS_UNHANDLED;
    }

    /* Send the response. */
    send_metamsg_rsp(
        &btif_rc_cb.rc_multi_cb[idx], -1,
        btif_rc_cb.rc_multi_cb[idx].rc_notif[event_id - 1].label,
        ((type == BTRC_NOTIFICATION_TYPE_INTERIM) ? AVRC_CMD_NOTIF
                                                  : AVRC_RSP_CHANGED),
        &avrc_rsp);
  }
  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         get_folder_items_list_rsp
 *
 * Description      Returns the list of media items in current folder along with
 *                  requested attributes. This is called in response to
 *                  GetFolderItems request.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *                      BT_STATUS_UNHANDLED - when rsp is not pending for
 *                                            get_folder_items_list PDU
 *
 **************************************************************************/
static bt_status_t get_folder_items_list_rsp(RawAddress* bd_addr,
                                             btrc_status_t rsp_status,
                                             uint16_t uid_counter,
                                             uint8_t num_items,
                                             btrc_folder_items_t* p_items) {
  tAVRC_RESPONSE avrc_rsp;
  tAVRC_ITEM item;
  tBTA_AV_CODE code = 0, ctype = 0;
  BT_HDR* p_msg = NULL;
  int item_cnt;
  tAVRC_STS status = AVRC_STS_NO_ERROR;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  btrc_folder_items_t* cur_item = NULL;

  BTIF_TRACE_DEBUG("%s: uid_counter %d num_items %d", __func__, uid_counter,
                   num_items);
  CHECK_RC_CONNECTED(p_dev);

  /* check if rsp to previous cmd was completed */
  if (p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].is_rsp_pending == false) {
    BTIF_TRACE_WARNING("%s: Not sending response as no PDU was registered",
                       __func__);
    return BT_STATUS_UNHANDLED;
  }

  memset(&avrc_rsp, 0, sizeof(tAVRC_RESPONSE));
  memset(&item, 0, sizeof(tAVRC_ITEM));

  avrc_rsp.get_items.pdu = AVRC_PDU_GET_FOLDER_ITEMS;
  avrc_rsp.get_items.opcode = opcode_from_pdu(AVRC_PDU_GET_FOLDER_ITEMS);
  avrc_rsp.get_items.status = status_code_map[rsp_status];

  if (avrc_rsp.get_items.status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_WARNING(
        "%s: Error in parsing the received getfolderitems cmd. status: 0x%02x",
        __func__, avrc_rsp.get_items.status);
    status = avrc_rsp.get_items.status;
  } else {
    avrc_rsp.get_items.uid_counter = uid_counter;
    avrc_rsp.get_items.item_count = 1;

    /* create single item and build response iteratively for all num_items */
    for (item_cnt = 0; item_cnt < num_items; item_cnt++) {
      cur_item = &p_items[item_cnt];
      item.item_type = p_items->item_type;
      /* build respective item based on item_type. All items should be of same
       * type within
       * a response */
      switch (p_items->item_type) {
        case AVRC_ITEM_PLAYER: {
          item.u.player.name.charset_id = cur_item->player.charset_id;
          memcpy(&(item.u.player.features), &(cur_item->player.features),
                 sizeof(cur_item->player.features));
          item.u.player.major_type = cur_item->player.major_type;
          item.u.player.sub_type = cur_item->player.sub_type;
          item.u.player.play_status = cur_item->player.play_status;
          item.u.player.player_id = cur_item->player.player_id;
          item.u.player.name.p_str = cur_item->player.name;
          item.u.player.name.str_len =
              (uint16_t)strlen((char*)(cur_item->player.name));
        } break;

        case AVRC_ITEM_FOLDER: {
          memcpy(item.u.folder.uid, cur_item->folder.uid, sizeof(tAVRC_UID));
          item.u.folder.type = cur_item->folder.type;
          item.u.folder.playable = cur_item->folder.playable;
          item.u.folder.name.charset_id = AVRC_CHARSET_ID_UTF8;
          item.u.folder.name.str_len = strlen((char*)cur_item->folder.name);
          item.u.folder.name.p_str = cur_item->folder.name;
        } break;

        case AVRC_ITEM_MEDIA: {
          tAVRC_ATTR_ENTRY attr_vals[BTRC_MAX_ELEM_ATTR_SIZE];

          memcpy(item.u.media.uid, cur_item->media.uid, sizeof(tAVRC_UID));
          item.u.media.type = cur_item->media.type;
          item.u.media.name.charset_id = cur_item->media.charset_id;
          item.u.media.name.str_len = strlen((char*)cur_item->media.name);
          item.u.media.name.p_str = cur_item->media.name;
          item.u.media.attr_count = cur_item->media.num_attrs;

          /* Handle attributes of given item */
          if (item.u.media.attr_count == 0) {
            item.u.media.p_attr_list = NULL;
          } else {
            memset(&attr_vals, 0,
                   sizeof(tAVRC_ATTR_ENTRY) * BTRC_MAX_ELEM_ATTR_SIZE);
            fill_avrc_attr_entry(attr_vals, item.u.media.attr_count,
                                 cur_item->media.p_attrs);
            item.u.media.p_attr_list = attr_vals;
          }
        } break;

        default: {
          BTIF_TRACE_ERROR("%s: Unknown item_type: %d. Internal Error",
                           __func__, p_items->item_type);
          status = AVRC_STS_INTERNAL_ERR;
        } break;
      }

      avrc_rsp.get_items.p_item_list = &item;

      /* Add current item to buffer and build response if no error in item type
       */
      if (status != AVRC_STS_NO_ERROR) {
        /* Reject response due to error occured for unknown item_type, break the
         * loop */
        break;
      }

      int len_before = p_msg ? p_msg->len : 0;
      BTIF_TRACE_DEBUG("%s: item_cnt: %d len: %d", __func__, item_cnt,
                       len_before);
      status = AVRC_BldResponse(p_dev->rc_handle, &avrc_rsp, &p_msg);
      BTIF_TRACE_DEBUG("%s: Build rsp status: %d len: %d", __func__, status,
                       (p_msg ? p_msg->len : 0));
      int len_after = p_msg ? p_msg->len : 0;
      if (status != AVRC_STS_NO_ERROR || len_before == len_after) {
        /* Error occured in build response or we ran out of buffer so break the
         * loop */
        break;
      }
    }

    /* setting the error status */
    avrc_rsp.get_items.status = status;
  }

  /* if packet built successfully, send the built items to BTA layer */
  if (status == AVRC_STS_NO_ERROR) {
    code = p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].ctype;
    ctype = get_rsp_type_code(avrc_rsp.get_items.status, code);
    BTA_AvMetaRsp(p_dev->rc_handle,
                  p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].label, ctype,
                  p_msg);
  } else /* Error occured, send reject response */
  {
    BTIF_TRACE_ERROR("%s: Error status: 0x%02X. Sending reject rsp", __func__,
                     avrc_rsp.rsp.status);
    send_reject_response(
        p_dev->rc_handle, p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].label,
        avrc_rsp.pdu, avrc_rsp.get_items.status, avrc_rsp.get_items.opcode);
  }

  /* Reset values for current pdu. */
  p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].ctype = 0;
  p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].label = 0;
  p_dev->rc_pdu_info[IDX_GET_FOLDER_ITEMS_RSP].is_rsp_pending = false;

  return status == AVRC_STS_NO_ERROR ? BT_STATUS_SUCCESS : BT_STATUS_FAIL;
}

/***************************************************************************
 *
 * Function         set_addressed_player_rsp
 *
 * Description      Response to set the addressed player for specified media
 *                  player based on id in the media player list.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t set_addressed_player_rsp(RawAddress* bd_addr,
                                            btrc_status_t rsp_status) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.addr_player.pdu = AVRC_PDU_SET_ADDRESSED_PLAYER;
  avrc_rsp.addr_player.opcode = opcode_from_pdu(AVRC_PDU_SET_ADDRESSED_PLAYER);
  avrc_rsp.addr_player.status = status_code_map[rsp_status];

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_SET_ADDR_PLAYER_RSP,
                   p_dev->rc_pdu_info[IDX_SET_ADDR_PLAYER_RSP].label,
                   p_dev->rc_pdu_info[IDX_SET_ADDR_PLAYER_RSP].ctype,
                   &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         set_browsed_player_rsp
 *
 * Description      Response to set the browsed player command which contains
 *                  current browsed path of the media player. By default,
 *                  current_path = root and folder_depth = 0 for
 *                  every set_browsed_player request.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - if RC is connected and reponse
 *                                            sent successfully
 *                      BT_STATUS_UNHANDLED - when rsp is not pending for
 *                                            set_browsed_player PDU
 *
 **************************************************************************/
static bt_status_t set_browsed_player_rsp(RawAddress* bd_addr,
                                          btrc_status_t rsp_status,
                                          uint32_t num_items,
                                          uint16_t charset_id,
                                          uint8_t folder_depth,
                                          btrc_br_folder_name_t* p_folders) {
  tAVRC_RESPONSE avrc_rsp;
  tAVRC_NAME item;
  BT_HDR* p_msg = NULL;
  tBTA_AV_CODE code = 0;
  tBTA_AV_CODE ctype = 0;
  unsigned int item_cnt;
  tAVRC_STS status = AVRC_STS_NO_ERROR;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  CHECK_RC_CONNECTED(p_dev);

  memset(&avrc_rsp, 0, sizeof(tAVRC_RESPONSE));
  memset(&item, 0, sizeof(tAVRC_NAME));

  avrc_rsp.br_player.status = status_code_map[rsp_status];
  avrc_rsp.br_player.pdu = AVRC_PDU_SET_BROWSED_PLAYER;
  avrc_rsp.br_player.opcode = opcode_from_pdu(AVRC_PDU_SET_BROWSED_PLAYER);

  BTIF_TRACE_DEBUG("%s: rsp_status: 0x%02X avrc_rsp.br_player.status: 0x%02X",
                   __func__, rsp_status, avrc_rsp.br_player.status);

  /* check if rsp to previous cmd was completed */
  if (p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].is_rsp_pending == false) {
    BTIF_TRACE_WARNING("%s: Not sending response as no PDU was registered",
                       __func__);
    return BT_STATUS_UNHANDLED;
  }

  if (AVRC_STS_NO_ERROR == avrc_rsp.get_items.status) {
    avrc_rsp.br_player.num_items = num_items;
    avrc_rsp.br_player.charset_id = charset_id;
    avrc_rsp.br_player.folder_depth = folder_depth;
    avrc_rsp.br_player.p_folders = (tAVRC_NAME*)p_folders;

    BTIF_TRACE_DEBUG("%s: folder_depth: 0x%02X num_items: %d", __func__,
                     folder_depth, num_items);

    if (folder_depth > 0) {
      /* Iteratively build response for all folders across folder depth upto
       * current path */
      avrc_rsp.br_player.folder_depth = 1;
      for (item_cnt = 0; item_cnt < folder_depth; item_cnt++) {
        BTIF_TRACE_DEBUG("%s: iteration: %d", __func__, item_cnt);
        item.str_len = p_folders[item_cnt].str_len;
        item.p_str = p_folders[item_cnt].p_str;
        avrc_rsp.br_player.p_folders = &item;

        /* Add current item to buffer and build response */
        status = AVRC_BldResponse(p_dev->rc_handle, &avrc_rsp, &p_msg);
        if (AVRC_STS_NO_ERROR != status) {
          BTIF_TRACE_WARNING("%s: Build rsp status: %d", __func__, status);
          /* if the build fails, it is likely that we ran out of buffer. so if
        * we have
        * some items to send, reset this error to no error for sending what we
        * have */
          if (item_cnt > 0) status = AVRC_STS_NO_ERROR;

          /* Error occured in build response so break the loop */
          break;
        }
      }
    } else /* current path is root folder, no folders navigated yet */
    {
      status = AVRC_BldResponse(p_dev->rc_handle, &avrc_rsp, &p_msg);
    }

    /* setting the error status */
    avrc_rsp.br_player.status = status;
  } else /* error received from above layer */
  {
    BTIF_TRACE_WARNING(
        "%s: Error in parsing the received setbrowsed command. status: 0x%02x",
        __func__, avrc_rsp.br_player.status);
    status = avrc_rsp.br_player.status;
  }

  /* if packet built successfully, send the built items to BTA layer */
  if (status == AVRC_STS_NO_ERROR) {
    code = p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].ctype;
    ctype = get_rsp_type_code(avrc_rsp.br_player.status, code);
    BTA_AvMetaRsp(p_dev->rc_handle,
                  p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].label, ctype,
                  p_msg);
  } else /* Error occured, send reject response */
  {
    BTIF_TRACE_ERROR("%s: Error status: 0x%02X. Sending reject rsp", __func__,
                     avrc_rsp.br_player.status);
    send_reject_response(
        p_dev->rc_handle, p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].label,
        avrc_rsp.pdu, avrc_rsp.br_player.status, avrc_rsp.get_items.opcode);
  }

  /* Reset values for set_browsed_player pdu.*/
  p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].ctype = 0;
  p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].label = 0;
  p_dev->rc_pdu_info[IDX_SET_BROWSED_PLAYER_RSP].is_rsp_pending = false;

  return status == AVRC_STS_NO_ERROR ? BT_STATUS_SUCCESS : BT_STATUS_FAIL;
}

/*******************************************************************************
 *
 * Function         change_path_rsp
 *
 * Description      Response to the change path command which
 *                  contains number of items in the changed path.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t change_path_rsp(RawAddress* bd_addr,
                                   btrc_status_t rsp_status,
                                   uint32_t num_items) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.chg_path.pdu = AVRC_PDU_CHANGE_PATH;
  avrc_rsp.chg_path.opcode = opcode_from_pdu(AVRC_PDU_CHANGE_PATH);
  avrc_rsp.chg_path.num_items = num_items;
  avrc_rsp.chg_path.status = status_code_map[rsp_status];

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_CHG_PATH_RSP,
                   p_dev->rc_pdu_info[IDX_CHG_PATH_RSP].label,
                   p_dev->rc_pdu_info[IDX_CHG_PATH_RSP].ctype, &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         search_rsp
 *
 * Description      Response to search a string from media content command.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t search_rsp(RawAddress* bd_addr, btrc_status_t rsp_status,
                              uint32_t uid_counter, uint32_t num_items) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.search.pdu = AVRC_PDU_SEARCH;
  avrc_rsp.search.opcode = opcode_from_pdu(AVRC_PDU_SEARCH);
  avrc_rsp.search.num_items = num_items;
  avrc_rsp.search.uid_counter = uid_counter;
  avrc_rsp.search.status = status_code_map[rsp_status];

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_SEARCH_RSP,
                   p_dev->rc_pdu_info[IDX_SEARCH_RSP].label,
                   p_dev->rc_pdu_info[IDX_SEARCH_RSP].ctype, &avrc_rsp);

  return BT_STATUS_SUCCESS;
}
/***************************************************************************
 *
 * Function         get_item_attr_rsp
 *
 * Description      Response to the get item's attributes command which
 *                  contains number of attributes and values list in text.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t get_item_attr_rsp(RawAddress* bd_addr,
                                     btrc_status_t rsp_status, uint8_t num_attr,
                                     btrc_element_attr_val_t* p_attrs) {
  tAVRC_RESPONSE avrc_rsp;
  tAVRC_ATTR_ENTRY item_attrs[BTRC_MAX_ELEM_ATTR_SIZE];
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  memset(item_attrs, 0, sizeof(tAVRC_ATTR_ENTRY) * num_attr);

  avrc_rsp.get_attrs.status = status_code_map[rsp_status];
  if (rsp_status == BTRC_STS_NO_ERROR) {
    fill_avrc_attr_entry(item_attrs, num_attr, p_attrs);
  }

  avrc_rsp.get_attrs.num_attrs = num_attr;
  avrc_rsp.get_attrs.p_attrs = item_attrs;
  avrc_rsp.get_attrs.pdu = AVRC_PDU_GET_ITEM_ATTRIBUTES;
  avrc_rsp.get_attrs.opcode = opcode_from_pdu(AVRC_PDU_GET_ITEM_ATTRIBUTES);

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_GET_ITEM_ATTR_RSP,
                   p_dev->rc_pdu_info[IDX_GET_ITEM_ATTR_RSP].label,
                   p_dev->rc_pdu_info[IDX_GET_ITEM_ATTR_RSP].ctype, &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         add_to_now_playing_rsp
 *
 * Description      Response to command for adding speciafied media item
 *                  to Now Playing queue.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t add_to_now_playing_rsp(RawAddress* bd_addr,
                                          btrc_status_t rsp_status) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.add_to_play.pdu = AVRC_PDU_ADD_TO_NOW_PLAYING;
  avrc_rsp.add_to_play.opcode = opcode_from_pdu(AVRC_PDU_ADD_TO_NOW_PLAYING);
  avrc_rsp.add_to_play.status = status_code_map[rsp_status];

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_ADD_TO_NOW_PLAYING_RSP,
                   p_dev->rc_pdu_info[IDX_ADD_TO_NOW_PLAYING_RSP].label,
                   p_dev->rc_pdu_info[IDX_ADD_TO_NOW_PLAYING_RSP].ctype,
                   &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         play_item_rsp
 *
 * Description      Response to command for playing the specified media item.
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t play_item_rsp(RawAddress* bd_addr,
                                 btrc_status_t rsp_status) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.play_item.pdu = AVRC_PDU_PLAY_ITEM;
  avrc_rsp.play_item.opcode = opcode_from_pdu(AVRC_PDU_PLAY_ITEM);
  avrc_rsp.play_item.status = status_code_map[rsp_status];

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_PLAY_ITEM_RSP,
                   p_dev->rc_pdu_info[IDX_PLAY_ITEM_RSP].label,
                   p_dev->rc_pdu_info[IDX_PLAY_ITEM_RSP].ctype, &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         get_total_num_of_items_rsp
 *
 * Description      response to command to get the Number of Items
 *                  in the selected folder at the selected scope
 *
 * Returns          bt_status_t
 *                      BT_STATUS_NOT_READY - when RC is not connected.
 *                      BT_STATUS_SUCCESS   - always if RC is connected
 *
 **************************************************************************/
static bt_status_t get_total_num_of_items_rsp(RawAddress* bd_addr,
                                              btrc_status_t rsp_status,
                                              uint32_t uid_counter,
                                              uint32_t num_items) {
  tAVRC_RESPONSE avrc_rsp;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.get_num_of_items.pdu = AVRC_PDU_GET_TOTAL_NUM_OF_ITEMS;
  avrc_rsp.get_num_of_items.opcode =
      opcode_from_pdu(AVRC_PDU_GET_TOTAL_NUM_OF_ITEMS);
  avrc_rsp.get_num_of_items.num_items = num_items;
  avrc_rsp.get_num_of_items.uid_counter = uid_counter;
  avrc_rsp.get_num_of_items.status = status_code_map[rsp_status];

  /* Send the response. */
  send_metamsg_rsp(p_dev, IDX_GET_TOTAL_NUM_OF_ITEMS_RSP,
                   p_dev->rc_pdu_info[IDX_GET_TOTAL_NUM_OF_ITEMS_RSP].label,
                   p_dev->rc_pdu_info[IDX_GET_TOTAL_NUM_OF_ITEMS_RSP].ctype,
                   &avrc_rsp);

  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         set_volume
 *
 * Description      Send current volume setting to remote side.
 *                  Support limited to SetAbsoluteVolume
 *                  This can be enhanced to support Relative Volume (AVRCP 1.0).
 *                  With RelateVolume, we will send VOLUME_UP/VOLUME_DOWN
 *                  as opposed to absolute volume level
 * volume: Should be in the range 0-127. bit7 is reseved and cannot be set
 *
 * Returns          bt_status_t
 *
 **************************************************************************/
static bt_status_t set_volume(uint8_t volume) {
  BTIF_TRACE_DEBUG("%s: volume: %d", __func__, volume);
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;
  rc_transaction_t* p_transaction = NULL;

  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    if (!btif_rc_cb.rc_multi_cb[idx].rc_connected) {
      status = BT_STATUS_NOT_READY;
      BTIF_TRACE_ERROR("%s: RC is not connected for device: 0x%x", __func__,
                       btif_rc_cb.rc_multi_cb[idx].rc_addr);
      continue;
    }

    if (btif_rc_cb.rc_multi_cb[idx].rc_volume == volume) {
      status = BT_STATUS_DONE;
      BTIF_TRACE_ERROR("%s: volume value already set earlier: 0x%02x", __func__,
                       volume);
      continue;
    }

    if ((btif_rc_cb.rc_multi_cb[idx].rc_volume != volume) &&
        btif_rc_cb.rc_multi_cb[idx].rc_state ==
            BTRC_CONNECTION_STATE_CONNECTED) {
      if ((btif_rc_cb.rc_multi_cb[idx].rc_features & BTA_AV_FEAT_RCTG) == 0) {
        status = BT_STATUS_NOT_READY;
        continue;
      } else {
        tAVRC_COMMAND avrc_cmd = {0};
        BT_HDR* p_msg = NULL;

        if (btif_rc_cb.rc_multi_cb[idx].rc_features & BTA_AV_FEAT_ADV_CTRL) {
          BTIF_TRACE_DEBUG("%s: Peer supports absolute volume. newVolume: %d",
                           __func__, volume);
          avrc_cmd.volume.opcode = AVRC_OP_VENDOR;
          avrc_cmd.volume.pdu = AVRC_PDU_SET_ABSOLUTE_VOLUME;
          avrc_cmd.volume.status = AVRC_STS_NO_ERROR;
          avrc_cmd.volume.volume = volume;

          if (AVRC_BldCommand(&avrc_cmd, &p_msg) == AVRC_STS_NO_ERROR) {
            bt_status_t tran_status = get_transaction(&p_transaction);

            if (BT_STATUS_SUCCESS == tran_status && NULL != p_transaction) {
              BTIF_TRACE_DEBUG("%s: msgreq being sent out with label: %d",
                               __func__, p_transaction->lbl);
              BTA_AvMetaCmd(btif_rc_cb.rc_multi_cb[idx].rc_handle,
                            p_transaction->lbl, AVRC_CMD_CTRL, p_msg);
              status = BT_STATUS_SUCCESS;
            } else {
              osi_free_and_reset((void**)&p_msg);
              BTIF_TRACE_ERROR(
                  "%s: failed to obtain transaction details. status: 0x%02x",
                  __func__, tran_status);
              status = BT_STATUS_FAIL;
            }
          } else {
            BTIF_TRACE_ERROR(
                "%s: failed to build absolute volume command. status: 0x%02x",
                __func__, status);
            status = BT_STATUS_FAIL;
          }
        }
      }
    }
  }
  return (bt_status_t)status;
}

/***************************************************************************
 *
 * Function         register_volumechange
 *
 * Description     Register for volume change notification from remote side.
 *
 * Returns          void
 *
 **************************************************************************/

static void register_volumechange(uint8_t lbl, btif_rc_device_cb_t* p_dev) {
  tAVRC_COMMAND avrc_cmd = {0};
  BT_HDR* p_msg = NULL;
  tAVRC_STS BldResp = AVRC_STS_BAD_CMD;
  rc_transaction_t* p_transaction = NULL;

  BTIF_TRACE_DEBUG("%s: label: %d", __func__, lbl);

  avrc_cmd.cmd.opcode = 0x00;
  avrc_cmd.pdu = AVRC_PDU_REGISTER_NOTIFICATION;
  avrc_cmd.reg_notif.event_id = AVRC_EVT_VOLUME_CHANGE;
  avrc_cmd.reg_notif.status = AVRC_STS_NO_ERROR;
  avrc_cmd.reg_notif.param = 0;

  BldResp = AVRC_BldCommand(&avrc_cmd, &p_msg);
  if (AVRC_STS_NO_ERROR == BldResp && p_msg) {
    p_transaction = get_transaction_by_lbl(lbl);
    if (p_transaction != NULL) {
      BTA_AvMetaCmd(p_dev->rc_handle, p_transaction->lbl, AVRC_CMD_NOTIF,
                    p_msg);
      BTIF_TRACE_DEBUG("%s: BTA_AvMetaCmd called", __func__);
    } else {
      osi_free(p_msg);
      BTIF_TRACE_ERROR("%s: transaction not obtained with label: %d", __func__,
                       lbl);
    }
  } else {
    BTIF_TRACE_ERROR("%s: failed to build command: %d", __func__, BldResp);
  }
}

/***************************************************************************
 *
 * Function         handle_rc_metamsg_rsp
 *
 * Description      Handle RC metamessage response
 *
 * Returns          void
 *
 **************************************************************************/
static void handle_rc_metamsg_rsp(tBTA_AV_META_MSG* pmeta_msg,
                                  btif_rc_device_cb_t* p_dev) {
  tAVRC_RESPONSE avrc_response = {0};
  uint8_t scratch_buf[512] = {0};
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;

  BTIF_TRACE_DEBUG("%s: ", __func__);

  if (AVRC_OP_VENDOR == pmeta_msg->p_msg->hdr.opcode &&
      (AVRC_RSP_CHANGED == pmeta_msg->code ||
       AVRC_RSP_INTERIM == pmeta_msg->code ||
       AVRC_RSP_ACCEPT == pmeta_msg->code || AVRC_RSP_REJ == pmeta_msg->code ||
       AVRC_RSP_NOT_IMPL == pmeta_msg->code)) {
    status = AVRC_ParsResponse(pmeta_msg->p_msg, &avrc_response, scratch_buf,
                               sizeof(scratch_buf));
    BTIF_TRACE_DEBUG(
        "%s: code:%d, event ID: %d, PDU: %x, parsing status: %d, label: %d",
        __func__, pmeta_msg->code, avrc_response.reg_notif.event_id,
        avrc_response.reg_notif.pdu, status, pmeta_msg->label);

    if (status != AVRC_STS_NO_ERROR) {
      if (AVRC_PDU_REGISTER_NOTIFICATION == avrc_response.rsp.pdu &&
          AVRC_EVT_VOLUME_CHANGE == avrc_response.reg_notif.event_id &&
          p_dev->rc_vol_label == pmeta_msg->label) {
        p_dev->rc_vol_label = MAX_LABEL;
        release_transaction(p_dev->rc_vol_label);
      } else if (AVRC_PDU_SET_ABSOLUTE_VOLUME == avrc_response.rsp.pdu) {
        release_transaction(pmeta_msg->label);
      }
      return;
    }

    if (AVRC_PDU_REGISTER_NOTIFICATION == avrc_response.rsp.pdu &&
        AVRC_EVT_VOLUME_CHANGE == avrc_response.reg_notif.event_id &&
        p_dev->rc_vol_label != pmeta_msg->label) {
      // Just discard the message, if the device sends back with an incorrect
      // label
      BTIF_TRACE_DEBUG(
          "%s: Discarding register notification in rsp.code: %d and label: %d",
          __func__, pmeta_msg->code, pmeta_msg->label);
      return;
    }

    if (AVRC_PDU_REGISTER_NOTIFICATION == avrc_response.rsp.pdu &&
        AVRC_EVT_VOLUME_CHANGE == avrc_response.reg_notif.event_id &&
        (AVRC_RSP_REJ == pmeta_msg->code ||
         AVRC_RSP_NOT_IMPL == pmeta_msg->code)) {
      BTIF_TRACE_DEBUG("%s remove AbsoluteVolume feature flag.", __func__);
      p_dev->rc_features &= ~BTA_AV_FEAT_ADV_CTRL;
      handle_rc_features(p_dev);
      return;
    }
  } else {
    BTIF_TRACE_DEBUG(
        "%s: Received vendor dependent in adv ctrl rsp. code: %d len: %d. Not "
        "processing it.",
        __func__, pmeta_msg->code, pmeta_msg->len);
    return;
  }

  if (AVRC_PDU_REGISTER_NOTIFICATION == avrc_response.rsp.pdu &&
      AVRC_EVT_VOLUME_CHANGE == avrc_response.reg_notif.event_id &&
      AVRC_RSP_CHANGED == pmeta_msg->code) {
    /* re-register for volume change notification */
    // Do not re-register for rejected case, as it might get into endless loop
    register_volumechange(p_dev->rc_vol_label, p_dev);
  } else if (AVRC_PDU_SET_ABSOLUTE_VOLUME == avrc_response.rsp.pdu) {
    /* free up the label here */
    release_transaction(pmeta_msg->label);
  }

  BTIF_TRACE_EVENT("%s: Passing received metamsg response to app. pdu: %s",
                   __func__, dump_rc_pdu(avrc_response.pdu));
  btif_rc_upstreams_rsp_evt((uint16_t)avrc_response.rsp.pdu, &avrc_response,
                            pmeta_msg->code, pmeta_msg->label, p_dev);
}

/***************************************************************************
 *
 * Function         iterate_supported_event_list_for_interim_rsp
 *
 * Description      iterator callback function to match the event and handle
 *                  timer cleanup
 * Returns          true to continue iterating, false to stop
 *
 **************************************************************************/
bool iterate_supported_event_list_for_interim_rsp(void* data, void* cb_data) {
  uint8_t* p_event_id;
  btif_rc_supported_event_t* p_event = (btif_rc_supported_event_t*)data;

  p_event_id = (uint8_t*)cb_data;

  if (p_event->event_id == *p_event_id) {
    p_event->status = eINTERIM;
    return false;
  }
  return true;
}

/***************************************************************************
 *
 * Function         iterate_supported_event_list_for_timeout
 *
 * Description      Iterator callback function for timeout handling.
 *                  As part of the failure handling, it releases the
 *                  transaction label and removes the event from list,
 *                  this event will not be requested again during
 *                  the lifetime of the connection.
 * Returns          false to stop iterating, true to continue
 *
 **************************************************************************/
bool iterate_supported_event_list_for_timeout(void* data, void* cb_data) {
  rc_context_t* cntxt = (rc_context_t*)cb_data;
  uint8_t label = cntxt->label & 0xFF;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(&cntxt->rc_addr);
  btif_rc_supported_event_t* p_event = (btif_rc_supported_event_t*)data;

  if (p_event->label == label) {
    list_remove(p_dev->rc_supported_event_list, p_event);
    return false;
  }
  return true;
}

/***************************************************************************
 *
 * Function         rc_notification_interim_timout
 *
 * Description      Interim response timeout handler.
 *                  Runs the iterator to check and clear the timed out event.
 *                  Proceeds to register for the unregistered events.
 * Returns          None
 *
 **************************************************************************/
static void rc_notification_interim_timout(uint8_t label,
                                           btif_rc_device_cb_t* p_dev) {
  list_node_t* node;
  rc_context_t cntxt;
  memset(&cntxt, 0, sizeof(rc_context_t));
  cntxt.label = label;
  cntxt.rc_addr = p_dev->rc_addr;

  list_foreach(p_dev->rc_supported_event_list,
               iterate_supported_event_list_for_timeout, &cntxt);
  /* Timeout happened for interim response for the registered event,
   * check if there are any pending for registration
   */
  node = list_begin(p_dev->rc_supported_event_list);
  while (node != NULL) {
    btif_rc_supported_event_t* p_event;

    p_event = (btif_rc_supported_event_t*)list_node(node);
    if ((p_event != NULL) && (p_event->status == eNOT_REGISTERED)) {
      register_for_event_notification(p_event, p_dev);
      break;
    }
    node = list_next(node);
  }
  /* Todo. Need to initiate application settings query if this
   * is the last event registration.
   */
}

/***************************************************************************
 *
 * Function         btif_rc_status_cmd_timeout_handler
 *
 * Description      RC status command timeout handler (Runs in BTIF context).
 * Returns          None
 *
 **************************************************************************/
static void btif_rc_status_cmd_timeout_handler(UNUSED_ATTR uint16_t event,
                                               char* data) {
  btif_rc_timer_context_t* p_context;
  tAVRC_RESPONSE avrc_response = {0};
  tBTA_AV_META_MSG meta_msg;
  btif_rc_device_cb_t* p_dev = NULL;

  p_context = (btif_rc_timer_context_t*)data;
  memset(&meta_msg, 0, sizeof(tBTA_AV_META_MSG));
  p_dev = btif_rc_get_device_by_bda(&p_context->rc_addr);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }
  meta_msg.rc_handle = p_dev->rc_handle;

  switch (p_context->rc_status_cmd.pdu_id) {
    case AVRC_PDU_REGISTER_NOTIFICATION:
      rc_notification_interim_timout(p_context->rc_status_cmd.label, p_dev);
      break;

    case AVRC_PDU_GET_CAPABILITIES:
      avrc_response.get_caps.status = BTIF_RC_STS_TIMEOUT;
      handle_get_capability_response(&meta_msg, &avrc_response.get_caps);
      break;

    case AVRC_PDU_LIST_PLAYER_APP_ATTR:
      avrc_response.list_app_attr.status = BTIF_RC_STS_TIMEOUT;
      handle_app_attr_response(&meta_msg, &avrc_response.list_app_attr);
      break;

    case AVRC_PDU_LIST_PLAYER_APP_VALUES:
      avrc_response.list_app_values.status = BTIF_RC_STS_TIMEOUT;
      handle_app_val_response(&meta_msg, &avrc_response.list_app_values);
      break;

    case AVRC_PDU_GET_CUR_PLAYER_APP_VALUE:
      avrc_response.get_cur_app_val.status = BTIF_RC_STS_TIMEOUT;
      handle_app_cur_val_response(&meta_msg, &avrc_response.get_cur_app_val);
      break;

    case AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT:
      avrc_response.get_app_attr_txt.status = BTIF_RC_STS_TIMEOUT;
      handle_app_attr_txt_response(&meta_msg, &avrc_response.get_app_attr_txt);
      break;

    case AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT:
      avrc_response.get_app_val_txt.status = BTIF_RC_STS_TIMEOUT;
      handle_app_attr_txt_response(&meta_msg, &avrc_response.get_app_val_txt);
      break;

    case AVRC_PDU_GET_ELEMENT_ATTR:
      avrc_response.get_attrs.status = BTIF_RC_STS_TIMEOUT;
      handle_get_elem_attr_response(&meta_msg, &avrc_response.get_attrs);
      break;

    case AVRC_PDU_GET_PLAY_STATUS:
      avrc_response.get_play_status.status = BTIF_RC_STS_TIMEOUT;
      handle_get_playstatus_response(&meta_msg, &avrc_response.get_play_status);
      break;
  }
  release_transaction(p_context->rc_status_cmd.label);
}

/***************************************************************************
 *
 * Function         btif_rc_status_cmd_timer_timeout
 *
 * Description      RC status command timeout callback.
 *                  This is called from BTU context and switches to BTIF
 *                  context to handle the timeout events
 * Returns          None
 *
 **************************************************************************/
static void btif_rc_status_cmd_timer_timeout(void* data) {
  btif_rc_timer_context_t* p_data = (btif_rc_timer_context_t*)data;

  btif_transfer_context(btif_rc_status_cmd_timeout_handler, 0, (char*)p_data,
                        sizeof(btif_rc_timer_context_t), NULL);
}

/***************************************************************************
 *
 * Function         btif_rc_control_cmd_timeout_handler
 *
 * Description      RC control command timeout handler (Runs in BTIF context).
 * Returns          None
 *
 **************************************************************************/
static void btif_rc_control_cmd_timeout_handler(UNUSED_ATTR uint16_t event,
                                                char* data) {
  btif_rc_timer_context_t* p_context = (btif_rc_timer_context_t*)data;
  tAVRC_RESPONSE avrc_response = {0};
  tBTA_AV_META_MSG meta_msg;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(&p_context->rc_addr);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  memset(&meta_msg, 0, sizeof(tBTA_AV_META_MSG));
  meta_msg.rc_handle = p_dev->rc_handle;

  switch (p_context->rc_control_cmd.pdu_id) {
    case AVRC_PDU_SET_PLAYER_APP_VALUE:
      avrc_response.set_app_val.status = BTIF_RC_STS_TIMEOUT;
      handle_set_app_attr_val_response(&meta_msg, &avrc_response.set_app_val);
      break;
  }
  release_transaction(p_context->rc_control_cmd.label);
}

/***************************************************************************
 *
 * Function         btif_rc_control_cmd_timer_timeout
 *
 * Description      RC control command timeout callback.
 *                  This is called from BTU context and switches to BTIF
 *                  context to handle the timeout events
 * Returns          None
 *
 **************************************************************************/
static void btif_rc_control_cmd_timer_timeout(void* data) {
  btif_rc_timer_context_t* p_data = (btif_rc_timer_context_t*)data;

  btif_transfer_context(btif_rc_control_cmd_timeout_handler, 0, (char*)p_data,
                        sizeof(btif_rc_timer_context_t), NULL);
}

/***************************************************************************
 *
 * Function         btif_rc_play_status_timeout_handler
 *
 * Description      RC play status timeout handler (Runs in BTIF context).
 * Returns          None
 *
 **************************************************************************/
static void btif_rc_play_status_timeout_handler(UNUSED_ATTR uint16_t event,
                                                char* p_data) {
  btif_rc_handle_t* rc_handle = (btif_rc_handle_t*)p_data;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_handle(rc_handle->handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s timeout handler but no device found for handle %d",
                     __func__, rc_handle->handle);
    return;
  }
  get_play_status_cmd(p_dev);
  rc_start_play_status_timer(p_dev);
}

/***************************************************************************
 *
 * Function         btif_rc_play_status_timer_timeout
 *
 * Description      RC play status timeout callback.
 *                  This is called from BTU context and switches to BTIF
 *                  context to handle the timeout events
 * Returns          None
 *
 **************************************************************************/
static void btif_rc_play_status_timer_timeout(void* data) {
  btif_rc_handle_t rc_handle;
  rc_handle.handle = PTR_TO_UINT(data);
  BTIF_TRACE_DEBUG("%s called with handle: %d", __func__, rc_handle);
  btif_transfer_context(btif_rc_play_status_timeout_handler, 0,
                        (char*)(&rc_handle), sizeof(btif_rc_handle_t), NULL);
}

/***************************************************************************
 *
 * Function         rc_start_play_status_timer
 *
 * Description      Helper function to start the timer to fetch play status.
 * Returns          None
 *
 **************************************************************************/
static void rc_start_play_status_timer(btif_rc_device_cb_t* p_dev) {
  /* Start the Play status timer only if it is not started */
  if (!alarm_is_scheduled(p_dev->rc_play_status_timer)) {
    if (p_dev->rc_play_status_timer == NULL) {
      p_dev->rc_play_status_timer = alarm_new("p_dev->rc_play_status_timer");
    }
    alarm_set_on_mloop(
        p_dev->rc_play_status_timer, BTIF_TIMEOUT_RC_INTERIM_RSP_MS,
        btif_rc_play_status_timer_timeout, UINT_TO_PTR(p_dev->rc_handle));
  }
}

/***************************************************************************
 *
 * Function         rc_stop_play_status_timer
 *
 * Description      Helper function to stop the play status timer.
 * Returns          None
 *
 **************************************************************************/
void rc_stop_play_status_timer(btif_rc_device_cb_t* p_dev) {
  alarm_cancel(p_dev->rc_play_status_timer);
}

/***************************************************************************
 *
 * Function         register_for_event_notification
 *
 * Description      Helper function registering notification events
 *                  sets an interim response timeout to handle if the remote
 *                  does not respond.
 * Returns          None
 *
 **************************************************************************/
static void register_for_event_notification(btif_rc_supported_event_t* p_event,
                                            btif_rc_device_cb_t* p_dev) {
  rc_transaction_t* p_transaction = NULL;
  bt_status_t status = get_transaction(&p_transaction);
  if (status != BT_STATUS_SUCCESS) {
    BTIF_TRACE_ERROR("%s: no more transaction labels: %d", __func__, status);
    return;
  }

  status = register_notification_cmd(p_transaction->lbl, p_event->event_id, 0,
                                     p_dev);
  if (status != BT_STATUS_SUCCESS) {
    BTIF_TRACE_ERROR("%s: Error in Notification registration: %d", __func__,
                     status);
    release_transaction(p_transaction->lbl);
    return;
  }

  btif_rc_timer_context_t* p_context = &p_transaction->txn_timer_context;
  p_event->label = p_transaction->lbl;
  p_event->status = eREGISTERED;
  p_context->rc_status_cmd.label = p_transaction->lbl;
  p_context->rc_status_cmd.pdu_id = AVRC_PDU_REGISTER_NOTIFICATION;
  p_context->rc_addr = p_dev->rc_addr;

  alarm_free(p_transaction->txn_timer);
  p_transaction->txn_timer = alarm_new("btif_rc.status_command_txn_timer");
  alarm_set_on_mloop(p_transaction->txn_timer, BTIF_TIMEOUT_RC_INTERIM_RSP_MS,
                     btif_rc_status_cmd_timer_timeout, p_context);
}

static void start_status_command_timer(uint8_t pdu_id, rc_transaction_t* p_txn,
                                       btif_rc_device_cb_t* p_dev) {
  btif_rc_timer_context_t* p_context = &p_txn->txn_timer_context;
  p_context->rc_status_cmd.label = p_txn->lbl;
  p_context->rc_status_cmd.pdu_id = pdu_id;
  p_context->rc_addr = p_dev->rc_addr;

  alarm_free(p_txn->txn_timer);
  p_txn->txn_timer = alarm_new("btif_rc.status_command_txn_timer");
  alarm_set_on_mloop(p_txn->txn_timer, BTIF_TIMEOUT_RC_STATUS_CMD_MS,
                     btif_rc_status_cmd_timer_timeout, p_context);
}

static void start_control_command_timer(uint8_t pdu_id, rc_transaction_t* p_txn,
                                        btif_rc_device_cb_t* p_dev) {
  btif_rc_timer_context_t* p_context = &p_txn->txn_timer_context;
  p_context->rc_control_cmd.label = p_txn->lbl;
  p_context->rc_control_cmd.pdu_id = pdu_id;
  p_context->rc_addr = p_dev->rc_addr;

  alarm_free(p_txn->txn_timer);
  p_txn->txn_timer = alarm_new("btif_rc.control_command_txn_timer");
  alarm_set_on_mloop(p_txn->txn_timer, BTIF_TIMEOUT_RC_CONTROL_CMD_MS,
                     btif_rc_control_cmd_timer_timeout, p_context);
}

bt_status_t build_and_send_vendor_cmd(tAVRC_COMMAND* avrc_cmd,
                                      tBTA_AV_CODE cmd_code,
                                      btif_rc_device_cb_t* p_dev) {
  rc_transaction_t* p_transaction = NULL;
  bt_status_t tran_status = get_transaction(&p_transaction);
  if (BT_STATUS_SUCCESS != tran_status) return BT_STATUS_FAIL;

  BT_HDR* p_msg = NULL;
  tAVRC_STS status = AVRC_BldCommand(avrc_cmd, &p_msg);
  if (status == AVRC_STS_NO_ERROR && p_msg != NULL) {
    uint8_t* data_start = (uint8_t*)(p_msg + 1) + p_msg->offset;
    BTIF_TRACE_DEBUG("%s: %s msgreq being sent out with label: %d", __func__,
                     dump_rc_pdu(avrc_cmd->pdu), p_transaction->lbl);
    BTA_AvVendorCmd(p_dev->rc_handle, p_transaction->lbl, cmd_code, data_start,
                    p_msg->len);
    status = BT_STATUS_SUCCESS;
    if (cmd_code == AVRC_CMD_STATUS) {
      start_status_command_timer(avrc_cmd->pdu, p_transaction, p_dev);
    } else if (cmd_code == AVRC_CMD_CTRL) {
      start_control_command_timer(avrc_cmd->pdu, p_transaction, p_dev);
    }
  } else {
    BTIF_TRACE_ERROR("%s: failed to build command. status: 0x%02x", __func__,
                     status);
  }
  osi_free(p_msg);
  return (bt_status_t)status;
}

/***************************************************************************
 *
 * Function         handle_get_capability_response
 *
 * Description      Handles the get_cap_response to populate company id info
 *                  and query the supported events.
 *                  Initiates Notification registration for events supported
 * Returns          None
 *
 **************************************************************************/
static void handle_get_capability_response(tBTA_AV_META_MSG* pmeta_msg,
                                           tAVRC_GET_CAPS_RSP* p_rsp) {
  int xx = 0;
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  /* Todo: Do we need to retry on command timeout */
  if (p_rsp->status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s: Error capability response: 0x%02X", __func__,
                     p_rsp->status);
    return;
  }

  if (p_rsp->capability_id == AVRC_CAP_EVENTS_SUPPORTED) {
    btif_rc_supported_event_t* p_event;

    /* Todo: Check if list can be active when we hit here */
    p_dev->rc_supported_event_list = list_new(osi_free);
    for (xx = 0; xx < p_rsp->count; xx++) {
      /* Skip registering for Play position change notification */
      if ((p_rsp->param.event_id[xx] == AVRC_EVT_PLAY_STATUS_CHANGE) ||
          (p_rsp->param.event_id[xx] == AVRC_EVT_TRACK_CHANGE) ||
          (p_rsp->param.event_id[xx] == AVRC_EVT_APP_SETTING_CHANGE) ||
          (p_rsp->param.event_id[xx] == AVRC_EVT_UIDS_CHANGE)) {
        p_event = (btif_rc_supported_event_t*)osi_malloc(
            sizeof(btif_rc_supported_event_t));
        p_event->event_id = p_rsp->param.event_id[xx];
        p_event->status = eNOT_REGISTERED;
        list_append(p_dev->rc_supported_event_list, p_event);
      }
    }
    p_event =
        (btif_rc_supported_event_t*)list_front(p_dev->rc_supported_event_list);
    if (p_event != NULL) {
      register_for_event_notification(p_event, p_dev);
    }
  } else if (p_rsp->capability_id == AVRC_CAP_COMPANY_ID) {
    getcapabilities_cmd(AVRC_CAP_EVENTS_SUPPORTED, p_dev);
    BTIF_TRACE_EVENT("%s: AVRC_CAP_COMPANY_ID: ", __func__);
    for (xx = 0; xx < p_rsp->count; xx++) {
      BTIF_TRACE_EVENT("%s: company_id: %d", __func__,
                       p_rsp->param.company_id[xx]);
    }
  }
}

bool rc_is_track_id_valid(tAVRC_UID uid) {
  tAVRC_UID invalid_uid = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

  if (memcmp(uid, invalid_uid, sizeof(tAVRC_UID)) == 0) {
    return false;
  } else {
    return true;
  }
}

/***************************************************************************
 *
 * Function         handle_notification_response
 *
 * Description      Main handler for notification responses to registered events
 *                  1. Register for unregistered event(in interim response path)
 *                  2. After registering for all supported events, start
 *                     retrieving application settings and values
 *                  3. Reregister for events on getting changed response
 *                  4. Run play status timer for getting position when the
 *                     status changes to playing
 *                  5. Get the Media details when the track change happens
 *                     or track change interim response is received with
 *                     valid track id
 *                  6. HAL callback for play status change and application
 *                     setting change
 * Returns          None
 *
 **************************************************************************/
static void handle_notification_response(tBTA_AV_META_MSG* pmeta_msg,
                                         tAVRC_REG_NOTIF_RSP* p_rsp) {
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
  uint32_t attr_list[] = {
      AVRC_MEDIA_ATTR_ID_TITLE,       AVRC_MEDIA_ATTR_ID_ARTIST,
      AVRC_MEDIA_ATTR_ID_ALBUM,       AVRC_MEDIA_ATTR_ID_TRACK_NUM,
      AVRC_MEDIA_ATTR_ID_NUM_TRACKS,  AVRC_MEDIA_ATTR_ID_GENRE,
      AVRC_MEDIA_ATTR_ID_PLAYING_TIME};

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  if (pmeta_msg->code == AVRC_RSP_INTERIM) {
    btif_rc_supported_event_t* p_event;
    list_node_t* node;

    BTIF_TRACE_DEBUG("%s: Interim response: 0x%2X ", __func__, p_rsp->event_id);
    switch (p_rsp->event_id) {
      case AVRC_EVT_PLAY_STATUS_CHANGE:
        /* Start timer to get play status periodically
         * if the play state is playing.
         */
        if (p_rsp->param.play_status == AVRC_PLAYSTATE_PLAYING) {
          rc_start_play_status_timer(p_dev);
        }
        HAL_CBACK(bt_rc_ctrl_callbacks, play_status_changed_cb, &rc_addr,
                  (btrc_play_status_t)p_rsp->param.play_status);
        break;

      case AVRC_EVT_TRACK_CHANGE:
        if (rc_is_track_id_valid(p_rsp->param.track) != true) {
          break;
        } else {
          uint8_t* p_data = p_rsp->param.track;
          /* Update the UID for current track
           * Attributes will be fetched after the AVRCP procedure
           */
          BE_STREAM_TO_UINT64(p_dev->rc_playing_uid, p_data);
        }
        break;

      case AVRC_EVT_APP_SETTING_CHANGE:
        break;

      case AVRC_EVT_NOW_PLAYING_CHANGE:
        break;

      case AVRC_EVT_AVAL_PLAYERS_CHANGE:
        break;

      case AVRC_EVT_ADDR_PLAYER_CHANGE:
        break;

      case AVRC_EVT_UIDS_CHANGE:
        break;

      case AVRC_EVT_TRACK_REACHED_END:
      case AVRC_EVT_TRACK_REACHED_START:
      case AVRC_EVT_PLAY_POS_CHANGED:
      case AVRC_EVT_BATTERY_STATUS_CHANGE:
      case AVRC_EVT_SYSTEM_STATUS_CHANGE:
      default:
        BTIF_TRACE_ERROR("%s: Unhandled interim response: 0x%2X", __func__,
                         p_rsp->event_id);
        return;
    }

    list_foreach(p_dev->rc_supported_event_list,
                 iterate_supported_event_list_for_interim_rsp,
                 &p_rsp->event_id);

    node = list_begin(p_dev->rc_supported_event_list);

    while (node != NULL) {
      p_event = (btif_rc_supported_event_t*)list_node(node);
      if ((p_event != NULL) && (p_event->status == eNOT_REGISTERED)) {
        register_for_event_notification(p_event, p_dev);
        break;
      }
      node = list_next(node);
      p_event = NULL;
    }
    /* Registered for all events, we can request application settings */
    if (p_event == NULL && p_dev->rc_app_settings.query_started == false) {
      /* we need to do this only if remote TG supports
       * player application settings
       */
      p_dev->rc_app_settings.query_started = true;
      if (p_dev->rc_features & BTA_AV_FEAT_APP_SETTING) {
        list_player_app_setting_attrib_cmd(p_dev);
      } else {
        BTIF_TRACE_DEBUG("%s: App setting not supported, complete procedure",
                         __func__);
        rc_ctrl_procedure_complete(p_dev);
      }
    }
  } else if (pmeta_msg->code == AVRC_RSP_CHANGED) {
    btif_rc_supported_event_t* p_event;
    list_node_t* node;

    BTIF_TRACE_DEBUG("%s: Notification completed: 0x%2X ", __func__,
                     p_rsp->event_id);

    node = list_begin(p_dev->rc_supported_event_list);

    while (node != NULL) {
      p_event = (btif_rc_supported_event_t*)list_node(node);
      if (p_event != NULL && p_event->event_id == p_rsp->event_id) {
        p_event->status = eNOT_REGISTERED;
        register_for_event_notification(p_event, p_dev);
        break;
      }
      node = list_next(node);
    }

    switch (p_rsp->event_id) {
      case AVRC_EVT_PLAY_STATUS_CHANGE:
        /* Start timer to get play status periodically
         * if the play state is playing.
         */
        if (p_rsp->param.play_status == AVRC_PLAYSTATE_PLAYING) {
          rc_start_play_status_timer(p_dev);
          get_element_attribute_cmd(AVRC_MAX_NUM_MEDIA_ATTR_ID, attr_list,
                                    p_dev);
        } else {
          rc_stop_play_status_timer(p_dev);
        }
        HAL_CBACK(bt_rc_ctrl_callbacks, play_status_changed_cb, &rc_addr,
                  (btrc_play_status_t)p_rsp->param.play_status);

        break;

      case AVRC_EVT_TRACK_CHANGE:
        if (rc_is_track_id_valid(p_rsp->param.track) != true) {
          break;
        }
        get_element_attribute_cmd(AVRC_MAX_NUM_MEDIA_ATTR_ID, attr_list, p_dev);
        break;

      case AVRC_EVT_APP_SETTING_CHANGE: {
        btrc_player_settings_t app_settings;
        uint16_t xx;

        app_settings.num_attr = p_rsp->param.player_setting.num_attr;
        for (xx = 0; xx < app_settings.num_attr; xx++) {
          app_settings.attr_ids[xx] = p_rsp->param.player_setting.attr_id[xx];
          app_settings.attr_values[xx] =
              p_rsp->param.player_setting.attr_value[xx];
        }
        HAL_CBACK(bt_rc_ctrl_callbacks, playerapplicationsetting_changed_cb,
                  &rc_addr, &app_settings);
      } break;

      case AVRC_EVT_NOW_PLAYING_CHANGE:
        break;

      case AVRC_EVT_AVAL_PLAYERS_CHANGE:
        break;

      case AVRC_EVT_ADDR_PLAYER_CHANGE:
        break;

      case AVRC_EVT_UIDS_CHANGE:
        break;

      case AVRC_EVT_TRACK_REACHED_END:
      case AVRC_EVT_TRACK_REACHED_START:
      case AVRC_EVT_PLAY_POS_CHANGED:
      case AVRC_EVT_BATTERY_STATUS_CHANGE:
      case AVRC_EVT_SYSTEM_STATUS_CHANGE:
      default:
        BTIF_TRACE_ERROR("%s: Unhandled completion response: 0x%2X", __func__,
                         p_rsp->event_id);
        return;
    }
  }
}

/***************************************************************************
 *
 * Function         handle_app_attr_response
 *
 * Description      handles the the application attributes response and
 *                  initiates procedure to fetch the attribute values
 * Returns          None
 *
 **************************************************************************/
static void handle_app_attr_response(tBTA_AV_META_MSG* pmeta_msg,
                                     tAVRC_LIST_APP_ATTR_RSP* p_rsp) {
  uint8_t xx;
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_dev == NULL || p_rsp->status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s: Error getting Player application settings: 0x%2X",
                     __func__, p_rsp->status);
    rc_ctrl_procedure_complete(p_dev);
    return;
  }

  for (xx = 0; xx < p_rsp->num_attr; xx++) {
    uint8_t st_index;

    if (p_rsp->attrs[xx] > AVRC_PLAYER_SETTING_LOW_MENU_EXT) {
      st_index = p_dev->rc_app_settings.num_ext_attrs;
      p_dev->rc_app_settings.ext_attrs[st_index].attr_id = p_rsp->attrs[xx];
      p_dev->rc_app_settings.num_ext_attrs++;
    } else {
      st_index = p_dev->rc_app_settings.num_attrs;
      p_dev->rc_app_settings.attrs[st_index].attr_id = p_rsp->attrs[xx];
      p_dev->rc_app_settings.num_attrs++;
    }
  }
  p_dev->rc_app_settings.attr_index = 0;
  p_dev->rc_app_settings.ext_attr_index = 0;
  p_dev->rc_app_settings.ext_val_index = 0;
  if (p_rsp->num_attr) {
    list_player_app_setting_value_cmd(p_dev->rc_app_settings.attrs[0].attr_id,
                                      p_dev);
  } else {
    BTIF_TRACE_ERROR("%s: No Player application settings found", __func__);
  }
}

/***************************************************************************
 *
 * Function         handle_app_val_response
 *
 * Description      handles the the attributes value response and if extended
 *                  menu is available, it initiates query for the attribute
 *                  text. If not, it initiates procedure to get the current
 *                  attribute values and calls the HAL callback for provding
 *                  application settings information.
 * Returns          None
 *
 **************************************************************************/
static void handle_app_val_response(tBTA_AV_META_MSG* pmeta_msg,
                                    tAVRC_LIST_APP_VALUES_RSP* p_rsp) {
  uint8_t xx, attr_index;
  uint8_t attrs[AVRC_MAX_APP_ATTR_SIZE];
  btif_rc_player_app_settings_t* p_app_settings;
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  /* Todo: Do we need to retry on command timeout */
  if (p_dev == NULL || p_rsp->status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s: Error fetching attribute values: 0x%02X", __func__,
                     p_rsp->status);
    return;
  }

  p_app_settings = &p_dev->rc_app_settings;
  RawAddress rc_addr = p_dev->rc_addr;

  if (p_app_settings->attr_index < p_app_settings->num_attrs) {
    attr_index = p_app_settings->attr_index;
    p_app_settings->attrs[attr_index].num_val = p_rsp->num_val;
    for (xx = 0; xx < p_rsp->num_val; xx++) {
      p_app_settings->attrs[attr_index].attr_val[xx] = p_rsp->vals[xx];
    }
    attr_index++;
    p_app_settings->attr_index++;
    if (attr_index < p_app_settings->num_attrs) {
      list_player_app_setting_value_cmd(
          p_app_settings->attrs[p_app_settings->attr_index].attr_id, p_dev);
    } else if (p_app_settings->ext_attr_index < p_app_settings->num_ext_attrs) {
      attr_index = 0;
      p_app_settings->ext_attr_index = 0;
      list_player_app_setting_value_cmd(
          p_app_settings->ext_attrs[attr_index].attr_id, p_dev);
    } else {
      for (xx = 0; xx < p_app_settings->num_attrs; xx++) {
        attrs[xx] = p_app_settings->attrs[xx].attr_id;
      }
      get_player_app_setting_cmd(p_app_settings->num_attrs, attrs, p_dev);
      HAL_CBACK(bt_rc_ctrl_callbacks, playerapplicationsetting_cb, &rc_addr,
                p_app_settings->num_attrs, p_app_settings->attrs, 0, NULL);
    }
  } else if (p_app_settings->ext_attr_index < p_app_settings->num_ext_attrs) {
    attr_index = p_app_settings->ext_attr_index;
    p_app_settings->ext_attrs[attr_index].num_val = p_rsp->num_val;
    for (xx = 0; xx < p_rsp->num_val; xx++) {
      p_app_settings->ext_attrs[attr_index].ext_attr_val[xx].val =
          p_rsp->vals[xx];
    }
    attr_index++;
    p_app_settings->ext_attr_index++;
    if (attr_index < p_app_settings->num_ext_attrs) {
      list_player_app_setting_value_cmd(
          p_app_settings->ext_attrs[p_app_settings->ext_attr_index].attr_id,
          p_dev);
    } else {
      uint8_t attr[AVRC_MAX_APP_ATTR_SIZE];

      for (uint8_t xx = 0; xx < p_app_settings->num_ext_attrs; xx++) {
        attr[xx] = p_app_settings->ext_attrs[xx].attr_id;
      }
      get_player_app_setting_attr_text_cmd(attr, p_app_settings->num_ext_attrs,
                                           p_dev);
    }
  }
}

/***************************************************************************
 *
 * Function         handle_app_cur_val_response
 *
 * Description      handles the the get attributes value response.
 *
 * Returns          None
 *
 **************************************************************************/
static void handle_app_cur_val_response(tBTA_AV_META_MSG* pmeta_msg,
                                        tAVRC_GET_CUR_APP_VALUE_RSP* p_rsp) {
  btrc_player_settings_t app_settings;
  uint16_t xx;
  btif_rc_device_cb_t* p_dev = NULL;

  /* Todo: Do we need to retry on command timeout */
  if (p_rsp->status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s: Error fetching current settings: 0x%02X", __func__,
                     p_rsp->status);
    return;
  }
  p_dev = btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: Error in getting Device Address", __func__);
    osi_free_and_reset((void**)&p_rsp->p_vals);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  app_settings.num_attr = p_rsp->num_val;
  for (xx = 0; xx < app_settings.num_attr; xx++) {
    app_settings.attr_ids[xx] = p_rsp->p_vals[xx].attr_id;
    app_settings.attr_values[xx] = p_rsp->p_vals[xx].attr_val;
  }

  HAL_CBACK(bt_rc_ctrl_callbacks, playerapplicationsetting_changed_cb, &rc_addr,
            &app_settings);
  /* Application settings are fetched only once for initial values
   * initiate anything that follows after RC procedure.
   * Defer it if browsing is supported till players query
   */
  rc_ctrl_procedure_complete(p_dev);
  osi_free_and_reset((void**)&p_rsp->p_vals);
}

/***************************************************************************
 *
 * Function         handle_app_attr_txt_response
 *
 * Description      handles the the get attributes text response, if fails
 *                  calls HAL callback with just normal settings and initiates
 *                  query for current settings else initiates query for value
 *                  text
 * Returns          None
 *
 **************************************************************************/
static void handle_app_attr_txt_response(tBTA_AV_META_MSG* pmeta_msg,
                                         tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp) {
  uint8_t xx;
  uint8_t vals[AVRC_MAX_APP_ATTR_SIZE];
  btif_rc_player_app_settings_t* p_app_settings;
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;
  p_app_settings = &p_dev->rc_app_settings;

  /* Todo: Do we need to retry on command timeout */
  if (p_rsp->status != AVRC_STS_NO_ERROR) {
    uint8_t attrs[AVRC_MAX_APP_ATTR_SIZE];

    BTIF_TRACE_ERROR("%s: Error fetching attribute text: 0x%02X", __func__,
                     p_rsp->status);
    /* Not able to fetch Text for extended Menu, skip the process
     * and cleanup used memory. Proceed to get the current settings
     * for standard attributes.
     */
    p_app_settings->num_ext_attrs = 0;
    for (xx = 0; xx < p_app_settings->ext_attr_index; xx++) {
      osi_free_and_reset((void**)&p_app_settings->ext_attrs[xx].p_str);
    }
    p_app_settings->ext_attr_index = 0;

    if (p_dev) {
      for (xx = 0; xx < p_app_settings->num_attrs; xx++) {
        attrs[xx] = p_app_settings->attrs[xx].attr_id;
      }

      HAL_CBACK(bt_rc_ctrl_callbacks, playerapplicationsetting_cb, &rc_addr,
                p_app_settings->num_attrs, p_app_settings->attrs, 0, NULL);
      get_player_app_setting_cmd(xx, attrs, p_dev);
    }
    return;
  }

  for (xx = 0; xx < p_rsp->num_attr; xx++) {
    uint8_t x;
    for (x = 0; x < p_app_settings->num_ext_attrs; x++) {
      if (p_app_settings->ext_attrs[x].attr_id == p_rsp->p_attrs[xx].attr_id) {
        p_app_settings->ext_attrs[x].charset_id = p_rsp->p_attrs[xx].charset_id;
        p_app_settings->ext_attrs[x].str_len = p_rsp->p_attrs[xx].str_len;
        p_app_settings->ext_attrs[x].p_str = p_rsp->p_attrs[xx].p_str;
        break;
      }
    }
  }

  for (xx = 0; xx < p_app_settings->ext_attrs[0].num_val; xx++) {
    vals[xx] = p_app_settings->ext_attrs[0].ext_attr_val[xx].val;
  }
  get_player_app_setting_value_text_cmd(vals, xx, p_dev);
}

/***************************************************************************
 *
 * Function         handle_app_attr_val_txt_response
 *
 * Description      handles the the get attributes value text response, if fails
 *                  calls HAL callback with just normal settings and initiates
 *                  query for current settings
 * Returns          None
 *
 **************************************************************************/
static void handle_app_attr_val_txt_response(
    tBTA_AV_META_MSG* pmeta_msg, tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp) {
  uint8_t xx, attr_index;
  uint8_t vals[AVRC_MAX_APP_ATTR_SIZE];
  uint8_t attrs[AVRC_MAX_APP_ATTR_SIZE];
  btif_rc_player_app_settings_t* p_app_settings;
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;
  p_app_settings = &p_dev->rc_app_settings;

  /* Todo: Do we need to retry on command timeout */
  if (p_rsp->status != AVRC_STS_NO_ERROR) {
    uint8_t attrs[AVRC_MAX_APP_ATTR_SIZE];

    BTIF_TRACE_ERROR("%s: Error fetching attribute value text: 0x%02X",
                     __func__, p_rsp->status);

    /* Not able to fetch Text for extended Menu, skip the process
     * and cleanup used memory. Proceed to get the current settings
     * for standard attributes.
     */
    p_app_settings->num_ext_attrs = 0;
    for (xx = 0; xx < p_app_settings->ext_attr_index; xx++) {
      int x;
      btrc_player_app_ext_attr_t* p_ext_attr = &p_app_settings->ext_attrs[xx];

      for (x = 0; x < p_ext_attr->num_val; x++)
        osi_free_and_reset((void**)&p_ext_attr->ext_attr_val[x].p_str);
      p_ext_attr->num_val = 0;
      osi_free_and_reset((void**)&p_app_settings->ext_attrs[xx].p_str);
    }
    p_app_settings->ext_attr_index = 0;

    for (xx = 0; xx < p_app_settings->num_attrs; xx++) {
      attrs[xx] = p_app_settings->attrs[xx].attr_id;
    }
    HAL_CBACK(bt_rc_ctrl_callbacks, playerapplicationsetting_cb, &rc_addr,
              p_app_settings->num_attrs, p_app_settings->attrs, 0, NULL);

    get_player_app_setting_cmd(xx, attrs, p_dev);
    return;
  }

  for (xx = 0; xx < p_rsp->num_attr; xx++) {
    uint8_t x;
    btrc_player_app_ext_attr_t* p_ext_attr;
    p_ext_attr = &p_app_settings->ext_attrs[p_app_settings->ext_val_index];
    for (x = 0; x < p_rsp->num_attr; x++) {
      if (p_ext_attr->ext_attr_val[x].val == p_rsp->p_attrs[xx].attr_id) {
        p_ext_attr->ext_attr_val[x].charset_id = p_rsp->p_attrs[xx].charset_id;
        p_ext_attr->ext_attr_val[x].str_len = p_rsp->p_attrs[xx].str_len;
        p_ext_attr->ext_attr_val[x].p_str = p_rsp->p_attrs[xx].p_str;
        break;
      }
    }
  }
  p_app_settings->ext_val_index++;

  if (p_app_settings->ext_val_index < p_app_settings->num_ext_attrs) {
    attr_index = p_app_settings->ext_val_index;
    for (xx = 0; xx < p_app_settings->ext_attrs[attr_index].num_val; xx++) {
      vals[xx] = p_app_settings->ext_attrs[attr_index].ext_attr_val[xx].val;
    }
    get_player_app_setting_value_text_cmd(vals, xx, p_dev);
  } else {
    uint8_t x;

    for (xx = 0; xx < p_app_settings->num_attrs; xx++) {
      attrs[xx] = p_app_settings->attrs[xx].attr_id;
    }
    for (x = 0; x < p_app_settings->num_ext_attrs; x++) {
      attrs[xx + x] = p_app_settings->ext_attrs[x].attr_id;
    }
    HAL_CBACK(bt_rc_ctrl_callbacks, playerapplicationsetting_cb, &rc_addr,
              p_app_settings->num_attrs, p_app_settings->attrs,
              p_app_settings->num_ext_attrs, p_app_settings->ext_attrs);
    get_player_app_setting_cmd(xx + x, attrs, p_dev);

    /* Free the application settings information after sending to
     * application.
     */
    for (xx = 0; xx < p_app_settings->ext_attr_index; xx++) {
      int x;
      btrc_player_app_ext_attr_t* p_ext_attr = &p_app_settings->ext_attrs[xx];

      for (x = 0; x < p_ext_attr->num_val; x++)
        osi_free_and_reset((void**)&p_ext_attr->ext_attr_val[x].p_str);
      p_ext_attr->num_val = 0;
      osi_free_and_reset((void**)&p_app_settings->ext_attrs[xx].p_str);
    }
    p_app_settings->num_attrs = 0;
  }
}

/***************************************************************************
 *
 * Function         handle_set_app_attr_val_response
 *
 * Description      handles the the set attributes value response, if fails
 *                  calls HAL callback to indicate the failure
 * Returns          None
 *
 **************************************************************************/
static void handle_set_app_attr_val_response(tBTA_AV_META_MSG* pmeta_msg,
                                             tAVRC_RSP* p_rsp) {
  uint8_t accepted = 0;
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  /* For timeout pmeta_msg will be NULL, else we need to
   * check if this is accepted by TG
   */
  if (pmeta_msg && (pmeta_msg->code == AVRC_RSP_ACCEPT)) {
    accepted = 1;
  }
  HAL_CBACK(bt_rc_ctrl_callbacks, setplayerappsetting_rsp_cb, &rc_addr,
            accepted);
}

/***************************************************************************
 *
 * Function         handle_get_elem_attr_response
 *
 * Description      handles the the element attributes response, calls
 *                  HAL callback to update track change information.
 * Returns          None
 *
 **************************************************************************/
static void handle_get_elem_attr_response(tBTA_AV_META_MSG* pmeta_msg,
                                          tAVRC_GET_ATTRS_RSP* p_rsp) {
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_rsp->status == AVRC_STS_NO_ERROR) {
    size_t buf_size = p_rsp->num_attrs * sizeof(btrc_element_attr_val_t);
    btrc_element_attr_val_t* p_attr =
        (btrc_element_attr_val_t*)osi_calloc(buf_size);

    if (p_dev == NULL) {
      BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
      return;
    }

    RawAddress rc_addr = p_dev->rc_addr;

    for (int i = 0; i < p_rsp->num_attrs; i++) {
      p_attr[i].attr_id = p_rsp->p_attrs[i].attr_id;
      /* Todo. Legth limit check to include null */
      if (p_rsp->p_attrs[i].name.str_len && p_rsp->p_attrs[i].name.p_str) {
        memcpy(p_attr[i].text, p_rsp->p_attrs[i].name.p_str,
               p_rsp->p_attrs[i].name.str_len);
        osi_free_and_reset((void**)&p_rsp->p_attrs[i].name.p_str);
      }
    }
    HAL_CBACK(bt_rc_ctrl_callbacks, track_changed_cb, &rc_addr,
              p_rsp->num_attrs, p_attr);
    osi_free(p_attr);
  } else if (p_rsp->status == BTIF_RC_STS_TIMEOUT) {
    /* Retry for timeout case, this covers error handling
     * for continuation failure also.
     */
    uint32_t attr_list[] = {
        AVRC_MEDIA_ATTR_ID_TITLE,       AVRC_MEDIA_ATTR_ID_ARTIST,
        AVRC_MEDIA_ATTR_ID_ALBUM,       AVRC_MEDIA_ATTR_ID_TRACK_NUM,
        AVRC_MEDIA_ATTR_ID_NUM_TRACKS,  AVRC_MEDIA_ATTR_ID_GENRE,
        AVRC_MEDIA_ATTR_ID_PLAYING_TIME};
    get_element_attribute_cmd(AVRC_MAX_NUM_MEDIA_ATTR_ID, attr_list, p_dev);
  } else {
    BTIF_TRACE_ERROR("%s: Error in get element attr procedure: %d", __func__,
                     p_rsp->status);
  }
}

/***************************************************************************
 *
 * Function         handle_get_playstatus_response
 *
 * Description      handles the the play status response, calls
 *                  HAL callback to update play position.
 * Returns          None
 *
 **************************************************************************/
static void handle_get_playstatus_response(tBTA_AV_META_MSG* pmeta_msg,
                                           tAVRC_GET_PLAY_STATUS_RSP* p_rsp) {

  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  if (p_rsp->status == AVRC_STS_NO_ERROR) {
    HAL_CBACK(bt_rc_ctrl_callbacks, play_position_changed_cb, &rc_addr,
              p_rsp->song_len, p_rsp->song_pos);
  } else {
    BTIF_TRACE_ERROR("%s: Error in get play status procedure: %d", __func__,
                     p_rsp->status);
  }
}

/***************************************************************************
 *
 * Function         handle_set_addressed_player_response
 *
 * Description      handles the the set addressed player response, calls
 *                  HAL callback
 * Returns          None
 *
 **************************************************************************/
static void handle_set_addressed_player_response(tBTA_AV_META_MSG* pmeta_msg,
                                                 tAVRC_RSP* p_rsp) {

  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);

  if (p_dev == NULL) {
    BTIF_TRACE_ERROR("%s: p_dev NULL", __func__);
    return;
  }

  RawAddress rc_addr = p_dev->rc_addr;

  if (p_rsp->status == AVRC_STS_NO_ERROR) {
    HAL_CBACK(bt_rc_ctrl_callbacks, set_addressed_player_cb, &rc_addr,
              p_rsp->status);
  } else {
    BTIF_TRACE_ERROR("%s: Error in get play status procedure %d", __func__,
                     p_rsp->status);
  }
}

/***************************************************************************
 *
 * Function         handle_get_folder_items_response
 *
 * Description      handles the the get folder items response, calls
 *                  HAL callback to send the folder items.
 * Returns          None
 *
 **************************************************************************/
static void handle_get_folder_items_response(tBTA_AV_META_MSG* pmeta_msg,
                                             tAVRC_GET_ITEMS_RSP* p_rsp) {
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
  RawAddress rc_addr = p_dev->rc_addr;

  if (p_rsp->status == AVRC_STS_NO_ERROR) {
    /* Convert the internal folder listing into a response that can
     * be passed onto JNI via HAL_CBACK
     */
    uint8_t item_count = p_rsp->item_count;
    btrc_folder_items_t* btrc_items = (btrc_folder_items_t*)osi_malloc(
        sizeof(btrc_folder_items_t) * item_count);
    for (uint8_t i = 0; i < item_count; i++) {
      const tAVRC_ITEM* avrc_item = &(p_rsp->p_item_list[i]);
      btrc_folder_items_t* btrc_item = &(btrc_items[i]);
      BTIF_TRACE_DEBUG("%s folder item type %d", __func__,
                       avrc_item->item_type);
      switch (avrc_item->item_type) {
        case AVRC_ITEM_MEDIA:
          BTIF_TRACE_DEBUG("%s setting type to %d", __func__, BTRC_ITEM_MEDIA);
          get_folder_item_type_media(avrc_item, btrc_item);
          break;

        case AVRC_ITEM_FOLDER:
          BTIF_TRACE_DEBUG("%s setting type to BTRC_ITEM_FOLDER", __func__);
          get_folder_item_type_folder(avrc_item, btrc_item);
          break;

        case AVRC_ITEM_PLAYER:
          BTIF_TRACE_DEBUG("%s setting type to BTRC_ITEM_PLAYER", __func__);
          get_folder_item_type_player(avrc_item, btrc_item);
          break;

        default:
          BTIF_TRACE_ERROR("%s cannot understand folder item type %d", __func__,
                           avrc_item->item_type);
      }
    }

    HAL_CBACK(bt_rc_ctrl_callbacks, get_folder_items_cb, &rc_addr,
              BTRC_STS_NO_ERROR,
              /* We want to make the ownership explicit in native */
              (const btrc_folder_items_t*)btrc_items, item_count);
    BTIF_TRACE_DEBUG("%s HAL CBACK get_folder_items_cb finished", __func__);

    /* Release the memory block for items since we OWN the object */
    osi_free(btrc_items);
  } else {
    BTIF_TRACE_ERROR("%s: Error %d", __func__, p_rsp->status);
    HAL_CBACK(bt_rc_ctrl_callbacks, get_folder_items_cb, &rc_addr,
              (btrc_status_t)p_rsp->status, NULL, 0);
  }
}

/***************************************************************************
 *
 * Function         get_folder_item_type_media
 *
 * Description      Converts the AVRC representation of a folder item with
 *                  TYPE media to BTIF representation.
 * Returns          None
 *
 **************************************************************************/
void get_folder_item_type_media(const tAVRC_ITEM* avrc_item,
                                btrc_folder_items_t* btrc_item) {
  btrc_item->item_type = BTRC_ITEM_MEDIA;
  const tAVRC_ITEM_MEDIA* avrc_item_media = &(avrc_item->u.media);
  btrc_item_media_t* btrc_item_media = &(btrc_item->media);
  /* UID */
  memset(btrc_item_media->uid, 0, BTRC_UID_SIZE * sizeof(uint8_t));
  memcpy(btrc_item_media->uid, avrc_item_media->uid,
         sizeof(uint8_t) * BTRC_UID_SIZE);

  /* Audio/Video type */
  switch (avrc_item_media->type) {
    case AVRC_MEDIA_TYPE_AUDIO:
      btrc_item_media->type = BTRC_MEDIA_TYPE_AUDIO;
      break;
    case AVRC_MEDIA_TYPE_VIDEO:
      btrc_item_media->type = BTRC_MEDIA_TYPE_VIDEO;
      break;
  }

  /* Charset ID */
  btrc_item_media->charset_id = avrc_item_media->name.charset_id;

  /* Copy the name */
  BTIF_TRACE_DEBUG("%s max len %d str len %d", __func__, BTRC_MAX_ATTR_STR_LEN,
                   avrc_item_media->name.str_len);
  memset(btrc_item_media->name, 0, BTRC_MAX_ATTR_STR_LEN * sizeof(uint8_t));
  memcpy(btrc_item_media->name, avrc_item_media->name.p_str,
         sizeof(uint8_t) * (avrc_item_media->name.str_len));

  /* Copy the parameters */
  btrc_item_media->num_attrs = avrc_item_media->attr_count;
  btrc_item_media->p_attrs = (btrc_element_attr_val_t*)osi_malloc(
      btrc_item_media->num_attrs * sizeof(btrc_element_attr_val_t));

  /* Extract each attribute */
  for (int i = 0; i < avrc_item_media->attr_count; i++) {
    btrc_element_attr_val_t* btrc_attr_pair = &(btrc_item_media->p_attrs[i]);
    tAVRC_ATTR_ENTRY* avrc_attr_pair = &(avrc_item_media->p_attr_list[i]);

    BTIF_TRACE_DEBUG("%s media attr id 0x%x", __func__,
                     avrc_attr_pair->attr_id);

    switch (avrc_attr_pair->attr_id) {
      case AVRC_MEDIA_ATTR_ID_TITLE:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_TITLE;
        break;
      case AVRC_MEDIA_ATTR_ID_ARTIST:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_ARTIST;
        break;
      case AVRC_MEDIA_ATTR_ID_ALBUM:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_ALBUM;
        break;
      case AVRC_MEDIA_ATTR_ID_TRACK_NUM:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_TRACK_NUM;
        break;
      case AVRC_MEDIA_ATTR_ID_NUM_TRACKS:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_NUM_TRACKS;
        break;
      case AVRC_MEDIA_ATTR_ID_GENRE:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_GENRE;
        break;
      case AVRC_MEDIA_ATTR_ID_PLAYING_TIME:
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_PLAYING_TIME;
        break;
      default:
        BTIF_TRACE_ERROR("%s invalid media attr id: 0x%x", __func__,
                         avrc_attr_pair->attr_id);
        btrc_attr_pair->attr_id = BTRC_MEDIA_ATTR_ID_INVALID;
    }

    memset(btrc_attr_pair->text, 0, BTRC_MAX_ATTR_STR_LEN * sizeof(uint8_t));
    memcpy(btrc_attr_pair->text, avrc_attr_pair->name.p_str,
           avrc_attr_pair->name.str_len);
  }
}

/***************************************************************************
 *
 * Function         get_folder_item_type_folder
 *
 * Description      Converts the AVRC representation of a folder item with
 *                  TYPE folder to BTIF representation.
 * Returns          None
 *
 **************************************************************************/
void get_folder_item_type_folder(const tAVRC_ITEM* avrc_item,
                                 btrc_folder_items_t* btrc_item) {
  btrc_item->item_type = BTRC_ITEM_FOLDER;
  const tAVRC_ITEM_FOLDER* avrc_item_folder = &(avrc_item->u.folder);
  btrc_item_folder_t* btrc_item_folder = &(btrc_item->folder);
  /* Copy the UID */
  memset(btrc_item_folder->uid, 0, BTRC_UID_SIZE * sizeof(uint8_t));
  memcpy(btrc_item_folder->uid, avrc_item_folder->uid,
         sizeof(uint8_t) * BTRC_UID_SIZE);

  /* Copy the type */
  switch (avrc_item_folder->type) {
    case AVRC_FOLDER_TYPE_MIXED:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_MIXED;
      break;
    case AVRC_FOLDER_TYPE_TITLES:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_TITLES;
      break;
    case AVRC_FOLDER_TYPE_ALNUMS:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_ALBUMS;
      break;
    case AVRC_FOLDER_TYPE_ARTISTS:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_ARTISTS;
      break;
    case AVRC_FOLDER_TYPE_GENRES:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_GENRES;
      break;
    case AVRC_FOLDER_TYPE_PLAYLISTS:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_PLAYLISTS;
      break;
    case AVRC_FOLDER_TYPE_YEARS:
      btrc_item_folder->type = BTRC_FOLDER_TYPE_YEARS;
      break;
  }

  /* Copy if playable */
  btrc_item_folder->playable = avrc_item_folder->playable;

  /* Copy name */
  BTIF_TRACE_DEBUG("%s max len %d str len %d", __func__, BTRC_MAX_ATTR_STR_LEN,
                   avrc_item_folder->name.str_len);
  memset(btrc_item_folder->name, 0, BTRC_MAX_ATTR_STR_LEN * sizeof(uint8_t));
  memcpy(btrc_item_folder->name, avrc_item_folder->name.p_str,
         avrc_item_folder->name.str_len * sizeof(uint8_t));

  /* Copy charset */
  btrc_item_folder->charset_id = avrc_item_folder->name.charset_id;
}

/***************************************************************************
 *
 * Function         get_folder_item_type_player
 *
 * Description      Converts the AVRC representation of a folder item with
 *                  TYPE player to BTIF representation.
 * Returns          None
 *
 **************************************************************************/
void get_folder_item_type_player(const tAVRC_ITEM* avrc_item,
                                 btrc_folder_items_t* btrc_item) {
  btrc_item->item_type = BTRC_ITEM_PLAYER;
  const tAVRC_ITEM_PLAYER* avrc_item_player = &(avrc_item->u.player);
  btrc_item_player_t* btrc_item_player = &(btrc_item->player);
  /* Player ID */
  btrc_item_player->player_id = avrc_item_player->player_id;
  /* Major type */
  btrc_item_player->major_type = avrc_item_player->major_type;
  /* Sub type */
  btrc_item_player->sub_type = avrc_item_player->sub_type;
  /* Features */
  memcpy(btrc_item_player->features, avrc_item_player->features,
         BTRC_FEATURE_BIT_MASK_SIZE);

  memset(btrc_item_player->name, 0, BTRC_MAX_ATTR_STR_LEN * sizeof(uint8_t));
  memcpy(btrc_item_player->name, avrc_item_player->name.p_str,
         avrc_item_player->name.str_len);
}

/***************************************************************************
 *
 * Function         handle_change_path_response
 *
 * Description      handles the the change path response, calls
 *                  HAL callback to send the updated folder
 * Returns          None
 *
 **************************************************************************/
static void handle_change_path_response(tBTA_AV_META_MSG* pmeta_msg,
                                        tAVRC_CHG_PATH_RSP* p_rsp) {
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
  RawAddress rc_addr = p_dev->rc_addr;

  if (p_rsp->status == AVRC_STS_NO_ERROR) {
    HAL_CBACK(bt_rc_ctrl_callbacks, change_folder_path_cb, &rc_addr,
              p_rsp->num_items);
  } else {
    BTIF_TRACE_ERROR("%s error in handle_change_path_response %d", __func__,
                     p_rsp->status);
  }
}

/***************************************************************************
 *
 * Function         handle_set_browsed_player_response
 *
 * Description      handles the the change path response, calls
 *                  HAL callback to send the updated folder
 * Returns          None
 *
 **************************************************************************/
static void handle_set_browsed_player_response(tBTA_AV_META_MSG* pmeta_msg,
                                               tAVRC_SET_BR_PLAYER_RSP* p_rsp) {
  btif_rc_device_cb_t* p_dev =
      btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
  RawAddress rc_addr = p_dev->rc_addr;

  if (p_rsp->status == AVRC_STS_NO_ERROR) {
    HAL_CBACK(bt_rc_ctrl_callbacks, set_browsed_player_cb, &rc_addr,
              p_rsp->num_items, p_rsp->folder_depth);
  } else {
    BTIF_TRACE_ERROR("%s error %d", __func__, p_rsp->status);
  }
}

/***************************************************************************
 *
 * Function         clear_cmd_timeout
 *
 * Description      helper function to stop the command timeout timer
 * Returns          None
 *
 **************************************************************************/
static void clear_cmd_timeout(uint8_t label) {
  rc_transaction_t* p_txn;

  p_txn = get_transaction_by_lbl(label);
  if (p_txn == NULL) {
    BTIF_TRACE_ERROR("%s: Error in transaction label lookup", __func__);
    return;
  }

  if (p_txn->txn_timer != NULL) alarm_cancel(p_txn->txn_timer);
}

/***************************************************************************
 *
 * Function         handle_avk_rc_metamsg_rsp
 *
 * Description      Handle RC metamessage response
 *
 * Returns          void
 *
 **************************************************************************/
static void handle_avk_rc_metamsg_rsp(tBTA_AV_META_MSG* pmeta_msg) {
  tAVRC_RESPONSE avrc_response = {0};
  uint8_t scratch_buf[512] = {0};  // this variable is unused
  uint16_t buf_len;
  tAVRC_STS status;

  BTIF_TRACE_DEBUG("%s: opcode: %d rsp_code: %d  ", __func__,
                   pmeta_msg->p_msg->hdr.opcode, pmeta_msg->code);

  status = AVRC_Ctrl_ParsResponse(pmeta_msg->p_msg, &avrc_response, scratch_buf,
                                  &buf_len);
  if ((AVRC_OP_VENDOR == pmeta_msg->p_msg->hdr.opcode) &&
      (pmeta_msg->code >= AVRC_RSP_NOT_IMPL) &&
      (pmeta_msg->code <= AVRC_RSP_INTERIM)) {
    BTIF_TRACE_DEBUG("%s parse status %d pdu = %d rsp_status = %d", __func__,
                     status, avrc_response.pdu,
                     pmeta_msg->p_msg->vendor.hdr.ctype);

    switch (avrc_response.pdu) {
      case AVRC_PDU_REGISTER_NOTIFICATION:
        handle_notification_response(pmeta_msg, &avrc_response.reg_notif);
        if (pmeta_msg->code == AVRC_RSP_INTERIM) {
          /* Don't free the transaction Id */
          clear_cmd_timeout(pmeta_msg->label);
          return;
        }
        break;

      case AVRC_PDU_GET_CAPABILITIES:
        handle_get_capability_response(pmeta_msg, &avrc_response.get_caps);
        break;

      case AVRC_PDU_LIST_PLAYER_APP_ATTR:
        handle_app_attr_response(pmeta_msg, &avrc_response.list_app_attr);
        break;

      case AVRC_PDU_LIST_PLAYER_APP_VALUES:
        handle_app_val_response(pmeta_msg, &avrc_response.list_app_values);
        break;

      case AVRC_PDU_GET_CUR_PLAYER_APP_VALUE:
        handle_app_cur_val_response(pmeta_msg, &avrc_response.get_cur_app_val);
        break;

      case AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT:
        handle_app_attr_txt_response(pmeta_msg,
                                     &avrc_response.get_app_attr_txt);
        break;

      case AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT:
        handle_app_attr_val_txt_response(pmeta_msg,
                                         &avrc_response.get_app_val_txt);
        break;

      case AVRC_PDU_SET_PLAYER_APP_VALUE:
        handle_set_app_attr_val_response(pmeta_msg, &avrc_response.set_app_val);
        break;

      case AVRC_PDU_GET_ELEMENT_ATTR:
        handle_get_elem_attr_response(pmeta_msg, &avrc_response.get_attrs);
        break;

      case AVRC_PDU_GET_PLAY_STATUS:
        handle_get_playstatus_response(pmeta_msg,
                                       &avrc_response.get_play_status);
        break;

      case AVRC_PDU_SET_ADDRESSED_PLAYER:
        handle_set_addressed_player_response(pmeta_msg, &avrc_response.rsp);
        break;
    }
  } else if (AVRC_OP_BROWSE == pmeta_msg->p_msg->hdr.opcode) {
    BTIF_TRACE_DEBUG("%s AVRC_OP_BROWSE pdu %d", __func__, avrc_response.pdu);
    /* check what kind of command it is for browsing */
    switch (avrc_response.pdu) {
      case AVRC_PDU_GET_FOLDER_ITEMS:
        handle_get_folder_items_response(pmeta_msg, &avrc_response.get_items);
        break;
      case AVRC_PDU_CHANGE_PATH:
        handle_change_path_response(pmeta_msg, &avrc_response.chg_path);
        break;
      case AVRC_PDU_SET_BROWSED_PLAYER:
        handle_set_browsed_player_response(pmeta_msg, &avrc_response.br_player);
        break;
      default:
        BTIF_TRACE_ERROR("%s cannot handle browse pdu %d", __func__,
                         pmeta_msg->p_msg->hdr.opcode);
    }
  } else {
    BTIF_TRACE_DEBUG(
        "%s: Invalid Vendor Command code: %d len: %d. Not processing it.",
        __func__, pmeta_msg->code, pmeta_msg->len);
    return;
  }
  BTIF_TRACE_DEBUG("XX __func__ release transaction %d", pmeta_msg->label);
  release_transaction(pmeta_msg->label);
}

/***************************************************************************
 *
 * Function         handle_avk_rc_metamsg_cmd
 *
 * Description      Handle RC metamessage response
 *
 * Returns          void
 *
 **************************************************************************/
static void handle_avk_rc_metamsg_cmd(tBTA_AV_META_MSG* pmeta_msg) {
  tAVRC_COMMAND avrc_cmd = {0};
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;
  btif_rc_device_cb_t* p_dev = NULL;

  BTIF_TRACE_DEBUG("%s: opcode: %d rsp_code: %d", __func__,
                   pmeta_msg->p_msg->hdr.opcode, pmeta_msg->code);
  status = AVRC_Ctrl_ParsCommand(pmeta_msg->p_msg, &avrc_cmd);
  if ((AVRC_OP_VENDOR == pmeta_msg->p_msg->hdr.opcode) &&
      (pmeta_msg->code <= AVRC_CMD_GEN_INQ)) {
    BTIF_TRACE_DEBUG("%s Received vendor command.code %d, PDU %d label %d",
                     __func__, pmeta_msg->code, avrc_cmd.pdu, pmeta_msg->label);

    if (status != AVRC_STS_NO_ERROR) {
      /* return error */
      BTIF_TRACE_WARNING(
          "%s: Error in parsing received metamsg command. status: 0x%02x",
          __func__, status);
      send_reject_response(pmeta_msg->rc_handle, pmeta_msg->label, avrc_cmd.pdu,
                           status, pmeta_msg->p_msg->hdr.opcode);
    } else {
      p_dev = btif_rc_get_device_by_handle(pmeta_msg->rc_handle);
      if (p_dev == NULL) {
        BTIF_TRACE_ERROR("%s: avk rc meta msg cmd for Invalid rc handle",
                         __func__);
        return;
      }

      if (avrc_cmd.pdu == AVRC_PDU_REGISTER_NOTIFICATION) {
        uint8_t event_id = avrc_cmd.reg_notif.event_id;
        BTIF_TRACE_EVENT("%s: Register notification event_id: %s", __func__,
                         dump_rc_notification_event_id(event_id));
      } else if (avrc_cmd.pdu == AVRC_PDU_SET_ABSOLUTE_VOLUME) {
        BTIF_TRACE_EVENT("%s: Abs Volume Cmd Recvd", __func__);
      }

      btif_rc_ctrl_upstreams_rsp_cmd(avrc_cmd.pdu, &avrc_cmd, pmeta_msg->label,
                                     p_dev);
    }
  } else {
    BTIF_TRACE_DEBUG(
        "%s: Invalid Vendor Command  code: %d len: %d. Not processing it.",
        __func__, pmeta_msg->code, pmeta_msg->len);
    return;
  }
}

/***************************************************************************
 *
 * Function         cleanup
 *
 * Description      Closes the AVRC interface
 *
 * Returns          void
 *
 **************************************************************************/
static void cleanup() {
  BTIF_TRACE_EVENT("%s: ", __func__);
  if (bt_rc_callbacks) {
    bt_rc_callbacks = NULL;
  }

  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    alarm_free(btif_rc_cb.rc_multi_cb[idx].rc_play_status_timer);
    memset(&btif_rc_cb.rc_multi_cb[idx], 0,
           sizeof(btif_rc_cb.rc_multi_cb[idx]));
  }

  BTIF_TRACE_EVENT("%s: completed", __func__);
}

/***************************************************************************
 *
 * Function         cleanup_ctrl
 *
 * Description      Closes the AVRC Controller interface
 *
 * Returns          void
 *
 **************************************************************************/
static void cleanup_ctrl() {
  BTIF_TRACE_EVENT("%s: ", __func__);

  if (bt_rc_ctrl_callbacks) {
    bt_rc_ctrl_callbacks = NULL;
  }

  for (int idx = 0; idx < BTIF_RC_NUM_CONN; idx++) {
    alarm_free(btif_rc_cb.rc_multi_cb[idx].rc_play_status_timer);
    memset(&btif_rc_cb.rc_multi_cb[idx], 0,
           sizeof(btif_rc_cb.rc_multi_cb[idx]));
  }

  memset(&btif_rc_cb.rc_multi_cb, 0, sizeof(btif_rc_cb.rc_multi_cb));
  BTIF_TRACE_EVENT("%s: completed", __func__);
}

/***************************************************************************
 *
 * Function         getcapabilities_cmd
 *
 * Description      GetCapabilties from Remote(Company_ID, Events_Supported)
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t getcapabilities_cmd(uint8_t cap_id,
                                       btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: cap_id: %d", __func__, cap_id);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.get_caps.opcode = AVRC_OP_VENDOR;
  avrc_cmd.get_caps.capability_id = cap_id;
  avrc_cmd.get_caps.pdu = AVRC_PDU_GET_CAPABILITIES;
  avrc_cmd.get_caps.status = AVRC_STS_NO_ERROR;

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         list_player_app_setting_attrib_cmd
 *
 * Description      Get supported List Player Attributes
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t list_player_app_setting_attrib_cmd(
    btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.list_app_attr.opcode = AVRC_OP_VENDOR;
  avrc_cmd.list_app_attr.pdu = AVRC_PDU_LIST_PLAYER_APP_ATTR;
  avrc_cmd.list_app_attr.status = AVRC_STS_NO_ERROR;

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         list_player_app_setting_value_cmd
 *
 * Description      Get values of supported Player Attributes
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t list_player_app_setting_value_cmd(
    uint8_t attrib_id, btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: attrib_id: %d", __func__, attrib_id);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.list_app_values.attr_id = attrib_id;
  avrc_cmd.list_app_values.opcode = AVRC_OP_VENDOR;
  avrc_cmd.list_app_values.pdu = AVRC_PDU_LIST_PLAYER_APP_VALUES;
  avrc_cmd.list_app_values.status = AVRC_STS_NO_ERROR;

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         get_player_app_setting_cmd
 *
 * Description      Get current values of Player Attributes
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t get_player_app_setting_cmd(uint8_t num_attrib,
                                              uint8_t* attrib_ids,
                                              btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: num_attrib: %d", __func__, num_attrib);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.get_cur_app_val.opcode = AVRC_OP_VENDOR;
  avrc_cmd.get_cur_app_val.status = AVRC_STS_NO_ERROR;
  avrc_cmd.get_cur_app_val.num_attr = num_attrib;
  avrc_cmd.get_cur_app_val.pdu = AVRC_PDU_GET_CUR_PLAYER_APP_VALUE;

  for (int count = 0; count < num_attrib; count++) {
    avrc_cmd.get_cur_app_val.attrs[count] = attrib_ids[count];
  }

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         get_playback_state_cmd
 *
 * Description      Fetch the current playback state for the device
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t get_playback_state_cmd(RawAddress* bd_addr) {
  BTIF_TRACE_DEBUG("%s", __func__);
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  return get_play_status_cmd(p_dev);
}

/***************************************************************************
 *
 * Function         get_now_playing_list_cmd
 *
 * Description      Fetch the now playing list
 *
 * Paramters        start_item: First item to fetch (0 to fetch from beganning)
 *                  end_item: Last item to fetch (0xff to fetch until end)
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t get_now_playing_list_cmd(RawAddress* bd_addr,
                                            uint8_t start_item,
                                            uint8_t num_items) {
  BTIF_TRACE_DEBUG("%s start, end: (%d, %d)", __func__, start_item, num_items);
  return get_folder_items_cmd(bd_addr, AVRC_SCOPE_NOW_PLAYING, start_item,
                              num_items);
}

/***************************************************************************
 *
 * Function         get_folder_list_cmd
 *
 * Description      Fetch the currently selected folder list
 *
 * Paramters        start_item: First item to fetch (0 to fetch from beganning)
 *                  end_item: Last item to fetch (0xff to fetch until end)
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t get_folder_list_cmd(RawAddress* bd_addr, uint8_t start_item,
                                       uint8_t num_items) {
  BTIF_TRACE_DEBUG("%s start, end: (%d, %d)", __func__, start_item, num_items);
  return get_folder_items_cmd(bd_addr, AVRC_SCOPE_FILE_SYSTEM, start_item,
                              num_items);
}

/***************************************************************************
 *
 * Function         get_player_list_cmd
 *
 * Description      Fetch the player list
 *
 * Paramters        start_item: First item to fetch (0 to fetch from beganning)
 *                  end_item: Last item to fetch (0xff to fetch until end)
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t get_player_list_cmd(RawAddress* bd_addr, uint8_t start_item,
                                       uint8_t num_items) {
  BTIF_TRACE_DEBUG("%s start, end: (%d, %d)", __func__, start_item, num_items);
  return get_folder_items_cmd(bd_addr, AVRC_SCOPE_PLAYER_LIST, start_item,
                              num_items);
}

/***************************************************************************
 *
 * Function         change_folder_path_cmd
 *
 * Description      Change the folder.
 *
 * Paramters        direction: Direction (Up/Down) to change folder
 *                  uid: The UID of folder to move to
 *                  start_item: First item to fetch (0 to fetch from beganning)
 *                  end_item: Last item to fetch (0xff to fetch until end)
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t change_folder_path_cmd(RawAddress* bd_addr,
                                          uint8_t direction, uint8_t* uid) {
  BTIF_TRACE_DEBUG("%s: direction %d", __func__, direction);
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  CHECK_RC_CONNECTED(p_dev);
  CHECK_BR_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};

  avrc_cmd.chg_path.pdu = AVRC_PDU_CHANGE_PATH;
  avrc_cmd.chg_path.status = AVRC_STS_NO_ERROR;
  // TODO(sanketa): Improve for database aware clients.
  avrc_cmd.chg_path.uid_counter = 0;
  avrc_cmd.chg_path.direction = direction;

  memset(avrc_cmd.chg_path.folder_uid, 0, AVRC_UID_SIZE * sizeof(uint8_t));
  memcpy(avrc_cmd.chg_path.folder_uid, uid, AVRC_UID_SIZE * sizeof(uint8_t));

  BT_HDR* p_msg = NULL;
  tAVRC_STS status = AVRC_BldCommand(&avrc_cmd, &p_msg);
  if (status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s failed to build command status %d", __func__, status);
    return BT_STATUS_FAIL;
  }

  rc_transaction_t* p_transaction = NULL;
  bt_status_t tran_status = get_transaction(&p_transaction);
  if (tran_status != BT_STATUS_SUCCESS || p_transaction == NULL) {
    osi_free(p_msg);
    BTIF_TRACE_ERROR("%s: failed to obtain transaction details. status: 0x%02x",
                     __func__, tran_status);
    return BT_STATUS_FAIL;
  }

  BTIF_TRACE_DEBUG("%s msgreq being sent out with label %d", __func__,
                   p_transaction->lbl);
  BTA_AvMetaCmd(p_dev->rc_handle, p_transaction->lbl, AVRC_CMD_CTRL, p_msg);
  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         set_browsed_player_cmd
 *
 * Description      Change the browsed player.
 *
 * Paramters        id: The UID of player to move to
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t set_browsed_player_cmd(RawAddress* bd_addr, uint16_t id) {
  BTIF_TRACE_DEBUG("%s: id %d", __func__, id);
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  CHECK_RC_CONNECTED(p_dev);
  CHECK_BR_CONNECTED(p_dev);

  rc_transaction_t* p_transaction = NULL;

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.br_player.pdu = AVRC_PDU_SET_BROWSED_PLAYER;
  avrc_cmd.br_player.status = AVRC_STS_NO_ERROR;
  // TODO(sanketa): Improve for database aware clients.
  avrc_cmd.br_player.player_id = id;

  BT_HDR* p_msg = NULL;
  tAVRC_STS status = AVRC_BldCommand(&avrc_cmd, &p_msg);
  if (status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s failed to build command status %d", __func__, status);
    return BT_STATUS_FAIL;
  }

  bt_status_t tran_status = get_transaction(&p_transaction);
  if (tran_status != BT_STATUS_SUCCESS || p_transaction == NULL) {
    osi_free(p_msg);
    BTIF_TRACE_ERROR("%s: failed to obtain transaction details. status: 0x%02x",
                     __func__, tran_status);
    return BT_STATUS_FAIL;
  }

  BTIF_TRACE_DEBUG("%s msgreq being sent out with label %d", __func__,
                   p_transaction->lbl);
  BTA_AvMetaCmd(p_dev->rc_handle, p_transaction->lbl, AVRC_CMD_CTRL, p_msg);
  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 **
 ** Function         set_addressed_player_cmd
 **
 ** Description      Change the addressed player.
 **
 ** Paramters        id: The UID of player to move to
 **
 ** Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 **                  BT_STATUS_FAIL.
 **
 ***************************************************************************/
static bt_status_t set_addressed_player_cmd(RawAddress* bd_addr, uint16_t id) {
  BTIF_TRACE_DEBUG("%s: id %d", __func__, id);

  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  CHECK_RC_CONNECTED(p_dev);
  CHECK_BR_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  BT_HDR* p_msg = NULL;

  avrc_cmd.addr_player.pdu = AVRC_PDU_SET_ADDRESSED_PLAYER;
  avrc_cmd.addr_player.status = AVRC_STS_NO_ERROR;
  // TODO(sanketa): Improve for database aware clients.
  avrc_cmd.addr_player.player_id = id;

  tAVRC_STS status = AVRC_BldCommand(&avrc_cmd, &p_msg);
  if (status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s: failed to build command status %d", __func__, status);
    return BT_STATUS_FAIL;
  }

  rc_transaction_t* p_transaction = NULL;
  bt_status_t tran_status = get_transaction(&p_transaction);

  if (tran_status != BT_STATUS_SUCCESS || p_transaction == NULL) {
    osi_free(p_msg);
    BTIF_TRACE_ERROR("%s: failed to obtain txn details. status: 0x%02x",
                     __func__, tran_status);
    return BT_STATUS_FAIL;
  }

  BTIF_TRACE_DEBUG("%s msgreq being sent out with label %d", __func__,
                   p_transaction->lbl);
  BTA_AvMetaCmd(p_dev->rc_handle, p_transaction->lbl, AVRC_CMD_CTRL, p_msg);
  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         get_folder_items_cmd
 *
 * Description      Helper function to browse the content hierarchy of the
 *                  TG device.
 *
 * Paramters        scope: AVRC_SCOPE_NOW_PLAYING (etc) for various browseable
 *                  content
 *                  start_item: First item to fetch (0 to fetch from beganning)
 *                  end_item: Last item to fetch (0xff to fetch until end)
 *
 * Returns          BT_STATUS_SUCCESS if command issued successfully otherwise
 *                  BT_STATUS_FAIL.
 *
 **************************************************************************/
static bt_status_t get_folder_items_cmd(RawAddress* bd_addr, uint8_t scope,
                                        uint8_t start_item, uint8_t end_item) {
  /* Check that both avrcp and browse channel are connected. */
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);
  CHECK_BR_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};

  /* Set the layer specific to point to browse although this should really
   * be done by lower layers and looking at the PDU
   */
  avrc_cmd.get_items.pdu = AVRC_PDU_GET_FOLDER_ITEMS;
  avrc_cmd.get_items.status = AVRC_STS_NO_ERROR;
  avrc_cmd.get_items.scope = scope;
  avrc_cmd.get_items.start_item = start_item;
  avrc_cmd.get_items.end_item = end_item;
  avrc_cmd.get_items.attr_count = 0; /* p_attr_list does not matter hence */

  BT_HDR* p_msg = NULL;
  tAVRC_STS status = AVRC_BldCommand(&avrc_cmd, &p_msg);
  if (status != AVRC_STS_NO_ERROR) {
    BTIF_TRACE_ERROR("%s failed to build command status %d", __func__, status);
    return BT_STATUS_FAIL;
  }

  rc_transaction_t* p_transaction = NULL;
  bt_status_t tran_status = get_transaction(&p_transaction);
  if (tran_status != BT_STATUS_SUCCESS || p_transaction == NULL) {
    osi_free(p_msg);
    BTIF_TRACE_ERROR("%s: failed to obtain transaction details. status: 0x%02x",
                     __func__, tran_status);
    return BT_STATUS_FAIL;
  }

  BTIF_TRACE_DEBUG("%s msgreq being sent out with label %d", __func__,
                   p_transaction->lbl);
  BTA_AvMetaCmd(p_dev->rc_handle, p_transaction->lbl, AVRC_CMD_CTRL, p_msg);
  return BT_STATUS_SUCCESS;
}

/***************************************************************************
 *
 * Function         change_player_app_setting
 *
 * Description      Set current values of Player Attributes
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t change_player_app_setting(RawAddress* bd_addr,
                                             uint8_t num_attrib,
                                             uint8_t* attrib_ids,
                                             uint8_t* attrib_vals) {
  BTIF_TRACE_DEBUG("%s: num_attrib: %d", __func__, num_attrib);
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.set_app_val.opcode = AVRC_OP_VENDOR;
  avrc_cmd.set_app_val.status = AVRC_STS_NO_ERROR;
  avrc_cmd.set_app_val.num_val = num_attrib;
  avrc_cmd.set_app_val.pdu = AVRC_PDU_SET_PLAYER_APP_VALUE;
  avrc_cmd.set_app_val.p_vals =
      (tAVRC_APP_SETTING*)osi_malloc(sizeof(tAVRC_APP_SETTING) * num_attrib);
  for (int count = 0; count < num_attrib; count++) {
    avrc_cmd.set_app_val.p_vals[count].attr_id = attrib_ids[count];
    avrc_cmd.set_app_val.p_vals[count].attr_val = attrib_vals[count];
  }

  bt_status_t st = build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_CTRL, p_dev);
  osi_free_and_reset((void**)&avrc_cmd.set_app_val.p_vals);
  return st;
}

/***************************************************************************
 *
 * Function         play_item_cmd
 *
 * Description      Play the item specified by UID & scope
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t play_item_cmd(RawAddress* bd_addr, uint8_t scope,
                                 uint8_t* uid, uint16_t uid_counter) {
  BTIF_TRACE_DEBUG("%s: scope %d uid_counter %d", __func__, scope, uid_counter);
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);
  CHECK_RC_CONNECTED(p_dev);
  CHECK_BR_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.pdu = AVRC_PDU_PLAY_ITEM;
  avrc_cmd.play_item.opcode = AVRC_OP_VENDOR;
  avrc_cmd.play_item.status = AVRC_STS_NO_ERROR;
  avrc_cmd.play_item.scope = scope;
  memcpy(avrc_cmd.play_item.uid, uid, AVRC_UID_SIZE);
  avrc_cmd.play_item.uid_counter = uid_counter;

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_CTRL, p_dev);
}

/***************************************************************************
 *
 * Function         get_player_app_setting_attr_text_cmd
 *
 * Description      Get text description for app attribute
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t get_player_app_setting_attr_text_cmd(
    uint8_t* attrs, uint8_t num_attrs, btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: num attrs: %d", __func__, num_attrs);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.pdu = AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT;
  avrc_cmd.get_app_attr_txt.opcode = AVRC_OP_VENDOR;
  avrc_cmd.get_app_attr_txt.num_attr = num_attrs;

  for (int count = 0; count < num_attrs; count++) {
    avrc_cmd.get_app_attr_txt.attrs[count] = attrs[count];
  }

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         get_player_app_setting_val_text_cmd
 *
 * Description      Get text description for app attribute values
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t get_player_app_setting_value_text_cmd(
    uint8_t* vals, uint8_t num_vals, btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: num_vals: %d", __func__, num_vals);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.pdu = AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT;
  avrc_cmd.get_app_val_txt.opcode = AVRC_OP_VENDOR;
  avrc_cmd.get_app_val_txt.num_val = num_vals;

  for (int count = 0; count < num_vals; count++) {
    avrc_cmd.get_app_val_txt.vals[count] = vals[count];
  }

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         register_notification_cmd
 *
 * Description      Send Command to register for a Notification ID
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t register_notification_cmd(uint8_t label, uint8_t event_id,
                                             uint32_t event_value,
                                             btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: event_id: %d event_value %d", __func__, event_id,
                   event_value);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.reg_notif.opcode = AVRC_OP_VENDOR;
  avrc_cmd.reg_notif.status = AVRC_STS_NO_ERROR;
  avrc_cmd.reg_notif.event_id = event_id;
  avrc_cmd.reg_notif.pdu = AVRC_PDU_REGISTER_NOTIFICATION;
  avrc_cmd.reg_notif.param = event_value;

  BT_HDR* p_msg = NULL;
  tAVRC_STS status = AVRC_BldCommand(&avrc_cmd, &p_msg);
  if (status == AVRC_STS_NO_ERROR) {
    uint8_t* data_start = (uint8_t*)(p_msg + 1) + p_msg->offset;
    BTIF_TRACE_DEBUG("%s: msgreq being sent out with label: %d", __func__,
                     label);
    if (p_msg != NULL) {
      BTA_AvVendorCmd(p_dev->rc_handle, label, AVRC_CMD_NOTIF, data_start,
                      p_msg->len);
      status = BT_STATUS_SUCCESS;
    }
  } else {
    BTIF_TRACE_ERROR("%s: failed to build command. status: 0x%02x", __func__,
                     status);
  }
  osi_free(p_msg);
  return (bt_status_t)status;
}

/***************************************************************************
 *
 * Function         get_element_attribute_cmd
 *
 * Description      Get Element Attribute for  attributeIds
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t get_element_attribute_cmd(uint8_t num_attribute,
                                             uint32_t* p_attr_ids,
                                             btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s: num_attribute: %d attribute_id: %d", __func__,
                   num_attribute, p_attr_ids[0]);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.get_elem_attrs.opcode = AVRC_OP_VENDOR;
  avrc_cmd.get_elem_attrs.status = AVRC_STS_NO_ERROR;
  avrc_cmd.get_elem_attrs.num_attr = num_attribute;
  avrc_cmd.get_elem_attrs.pdu = AVRC_PDU_GET_ELEMENT_ATTR;
  for (int count = 0; count < num_attribute; count++) {
    avrc_cmd.get_elem_attrs.attrs[count] = p_attr_ids[count];
  }

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         get_play_status_cmd
 *
 * Description      Get Playing Status of a Device
 *
 * Returns          bt_status_t
 *
 **************************************************************************/
static bt_status_t get_play_status_cmd(btif_rc_device_cb_t* p_dev) {
  BTIF_TRACE_DEBUG("%s", __func__);
  CHECK_RC_CONNECTED(p_dev);

  tAVRC_COMMAND avrc_cmd = {0};
  avrc_cmd.get_play_status.opcode = AVRC_OP_VENDOR;
  avrc_cmd.get_play_status.pdu = AVRC_PDU_GET_PLAY_STATUS;
  avrc_cmd.get_play_status.status = AVRC_STS_NO_ERROR;

  return build_and_send_vendor_cmd(&avrc_cmd, AVRC_CMD_STATUS, p_dev);
}

/***************************************************************************
 *
 * Function         set_volume_rsp
 *
 * Description      Rsp for SetAbsoluteVolume Command
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t set_volume_rsp(RawAddress* bd_addr, uint8_t abs_vol,
                                  uint8_t label) {
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;
  tAVRC_RESPONSE avrc_rsp;
  BT_HDR* p_msg = NULL;
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  CHECK_RC_CONNECTED(p_dev);

  BTIF_TRACE_DEBUG("%s: abs_vol: %d", __func__, abs_vol);

  avrc_rsp.volume.opcode = AVRC_OP_VENDOR;
  avrc_rsp.volume.pdu = AVRC_PDU_SET_ABSOLUTE_VOLUME;
  avrc_rsp.volume.status = AVRC_STS_NO_ERROR;
  avrc_rsp.volume.volume = abs_vol;
  status = AVRC_BldResponse(p_dev->rc_handle, &avrc_rsp, &p_msg);
  if (status == AVRC_STS_NO_ERROR) {
    uint8_t* data_start = (uint8_t*)(p_msg + 1) + p_msg->offset;
    BTIF_TRACE_DEBUG("%s: msgreq being sent out with label: %d", __func__,
                     p_dev->rc_vol_label);
    if (p_msg != NULL) {
      BTA_AvVendorRsp(p_dev->rc_handle, label, BTA_AV_RSP_ACCEPT, data_start,
                      p_msg->len, 0);
      status = BT_STATUS_SUCCESS;
    }
  } else {
    BTIF_TRACE_ERROR("%s: failed to build command. status: 0x%02x", __func__,
                     status);
  }
  osi_free(p_msg);
  return (bt_status_t)status;
}

/***************************************************************************
 *
 * Function         send_register_abs_vol_rsp
 *
 * Description      Rsp for Notification of Absolute Volume
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t volume_change_notification_rsp(
    RawAddress* bd_addr, btrc_notification_type_t rsp_type, uint8_t abs_vol,
    uint8_t label) {
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;
  tAVRC_RESPONSE avrc_rsp;
  BT_HDR* p_msg = NULL;
  BTIF_TRACE_DEBUG("%s: rsp_type: %d abs_vol: %d", __func__, rsp_type, abs_vol);

  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  CHECK_RC_CONNECTED(p_dev);

  avrc_rsp.reg_notif.opcode = AVRC_OP_VENDOR;
  avrc_rsp.reg_notif.pdu = AVRC_PDU_REGISTER_NOTIFICATION;
  avrc_rsp.reg_notif.status = AVRC_STS_NO_ERROR;
  avrc_rsp.reg_notif.param.volume = abs_vol;
  avrc_rsp.reg_notif.event_id = AVRC_EVT_VOLUME_CHANGE;

  status = AVRC_BldResponse(p_dev->rc_handle, &avrc_rsp, &p_msg);
  if (status == AVRC_STS_NO_ERROR) {
    BTIF_TRACE_DEBUG("%s: msgreq being sent out with label: %d", __func__,
                     label);
    uint8_t* data_start = (uint8_t*)(p_msg + 1) + p_msg->offset;
    BTA_AvVendorRsp(p_dev->rc_handle, label,
                    (rsp_type == BTRC_NOTIFICATION_TYPE_INTERIM)
                        ? AVRC_RSP_INTERIM
                        : AVRC_RSP_CHANGED,
                    data_start, p_msg->len, 0);
    status = BT_STATUS_SUCCESS;
  } else {
    BTIF_TRACE_ERROR("%s: failed to build command. status: 0x%02x", __func__,
                     status);
  }
  osi_free(p_msg);

  return (bt_status_t)status;
}

/***************************************************************************
 *
 * Function         send_groupnavigation_cmd
 *
 * Description      Send Pass-Through command
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t send_groupnavigation_cmd(RawAddress* bd_addr,
                                            uint8_t key_code,
                                            uint8_t key_state) {
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;
  rc_transaction_t* p_transaction = NULL;
  BTIF_TRACE_DEBUG("%s: key-code: %d, key-state: %d", __func__, key_code,
                   key_state);
  btif_rc_device_cb_t* p_dev = btif_rc_get_device_by_bda(bd_addr);

  CHECK_RC_CONNECTED(p_dev);

  if (p_dev->rc_features & BTA_AV_FEAT_RCTG) {
    bt_status_t tran_status = get_transaction(&p_transaction);
    if ((BT_STATUS_SUCCESS == tran_status) && (NULL != p_transaction)) {
      uint8_t buffer[AVRC_PASS_THRU_GROUP_LEN] = {0};
      uint8_t* start = buffer;
      UINT24_TO_BE_STREAM(start, AVRC_CO_METADATA);
      *(start)++ = 0;
      UINT8_TO_BE_STREAM(start, key_code);
      BTA_AvRemoteVendorUniqueCmd(p_dev->rc_handle, p_transaction->lbl,
                                  (tBTA_AV_STATE)key_state, buffer,
                                  AVRC_PASS_THRU_GROUP_LEN);
      status = BT_STATUS_SUCCESS;
      BTIF_TRACE_DEBUG("%s: succesfully sent group_navigation command to BTA",
                       __func__);
    } else {
      status = BT_STATUS_FAIL;
      BTIF_TRACE_DEBUG("%s: error in fetching transaction", __func__);
    }
  } else {
    status = BT_STATUS_FAIL;
    BTIF_TRACE_DEBUG("%s: feature not supported", __func__);
  }
  return (bt_status_t)status;
}

/***************************************************************************
 *
 * Function         send_passthrough_cmd
 *
 * Description      Send Pass-Through command
 *
 * Returns          void
 *
 **************************************************************************/
static bt_status_t send_passthrough_cmd(RawAddress* bd_addr, uint8_t key_code,
                                        uint8_t key_state) {
  tAVRC_STS status = BT_STATUS_UNSUPPORTED;
  btif_rc_device_cb_t* p_dev = NULL;
  BTIF_TRACE_ERROR("%s: calling btif_rc_get_device_by_bda", __func__);
  p_dev = btif_rc_get_device_by_bda(bd_addr);

  CHECK_RC_CONNECTED(p_dev);

  rc_transaction_t* p_transaction = NULL;
  BTIF_TRACE_DEBUG("%s: key-code: %d, key-state: %d", __func__, key_code,
                   key_state);
  if (p_dev->rc_features & BTA_AV_FEAT_RCTG) {
    bt_status_t tran_status = get_transaction(&p_transaction);
    if (BT_STATUS_SUCCESS == tran_status && NULL != p_transaction) {
      BTA_AvRemoteCmd(p_dev->rc_handle, p_transaction->lbl,
                      (tBTA_AV_RC)key_code, (tBTA_AV_STATE)key_state);
      status = BT_STATUS_SUCCESS;
      BTIF_TRACE_DEBUG("%s: succesfully sent passthrough command to BTA",
                       __func__);
    } else {
      status = BT_STATUS_FAIL;
      BTIF_TRACE_DEBUG("%s: error in fetching transaction", __func__);
    }
  } else {
    status = BT_STATUS_FAIL;
    BTIF_TRACE_DEBUG("%s: feature not supported", __func__);
  }
  return (bt_status_t)status;
}

static const btrc_interface_t bt_rc_interface = {
    sizeof(bt_rc_interface),
    init,
    get_play_status_rsp,
    NULL, /* list_player_app_attr_rsp */
    NULL, /* list_player_app_value_rsp */
    NULL, /* get_player_app_value_rsp */
    NULL, /* get_player_app_attr_text_rsp */
    NULL, /* get_player_app_value_text_rsp */
    get_element_attr_rsp,
    NULL, /* set_player_app_value_rsp */
    register_notification_rsp,
    set_volume,
    set_addressed_player_rsp,
    set_browsed_player_rsp,
    get_folder_items_list_rsp,
    change_path_rsp,
    get_item_attr_rsp,
    play_item_rsp,
    get_total_num_of_items_rsp,
    search_rsp,
    add_to_now_playing_rsp,
    cleanup,
};

static const btrc_ctrl_interface_t bt_rc_ctrl_interface = {
    sizeof(bt_rc_ctrl_interface),
    init_ctrl,
    send_passthrough_cmd,
    send_groupnavigation_cmd,
    change_player_app_setting,
    play_item_cmd,
    get_playback_state_cmd,
    get_now_playing_list_cmd,
    get_folder_list_cmd,
    get_player_list_cmd,
    change_folder_path_cmd,
    set_browsed_player_cmd,
    set_addressed_player_cmd,
    set_volume_rsp,
    volume_change_notification_rsp,
    cleanup_ctrl,
};

/*******************************************************************************
 *
 * Function         btif_rc_get_interface
 *
 * Description      Get the AVRCP Target callback interface
 *
 * Returns          btrc_interface_t
 *
 ******************************************************************************/
const btrc_interface_t* btif_rc_get_interface(void) {
  BTIF_TRACE_EVENT("%s: ", __func__);
  return &bt_rc_interface;
}

/*******************************************************************************
 *
 * Function         btif_rc_ctrl_get_interface
 *
 * Description      Get the AVRCP Controller callback interface
 *
 * Returns          btrc_ctrl_interface_t
 *
 ******************************************************************************/
const btrc_ctrl_interface_t* btif_rc_ctrl_get_interface(void) {
  BTIF_TRACE_EVENT("%s: ", __func__);
  return &bt_rc_ctrl_interface;
}

/*******************************************************************************
 *      Function         initialize_transaction
 *
 *      Description    Initializes fields of the transaction structure
 *
 *      Returns          void
 ******************************************************************************/
static void initialize_transaction(int lbl) {
  std::unique_lock<std::recursive_mutex>(device.lbllock);
  if (lbl < MAX_TRANSACTIONS_PER_SESSION) {
    if (alarm_is_scheduled(device.transaction[lbl].txn_timer)) {
      clear_cmd_timeout(lbl);
    }
    device.transaction[lbl].lbl = lbl;
    device.transaction[lbl].in_use = false;
    device.transaction[lbl].handle = 0;
  }
}

/*******************************************************************************
 *      Function         lbl_init
 *
 *      Description    Initializes label structures and mutexes.
 *
 *      Returns         void
 ******************************************************************************/
void lbl_init() {
  memset(&device.transaction, 0, sizeof(device.transaction));
  init_all_transactions();
}

/*******************************************************************************
 *
 * Function         init_all_transactions
 *
 * Description    Initializes all transactions
 *
 * Returns          void
 ******************************************************************************/
void init_all_transactions() {
  uint8_t txn_indx = 0;
  for (txn_indx = 0; txn_indx < MAX_TRANSACTIONS_PER_SESSION; txn_indx++) {
    initialize_transaction(txn_indx);
  }
}

/*******************************************************************************
 *
 * Function         get_transaction_by_lbl
 *
 * Description    Will return a transaction based on the label. If not inuse
 *                     will return an error.
 *
 * Returns          bt_status_t
 ******************************************************************************/
rc_transaction_t* get_transaction_by_lbl(uint8_t lbl) {
  rc_transaction_t* transaction = NULL;
  std::unique_lock<std::recursive_mutex> lock(device.lbllock);

  /* Determine if this is a valid label */
  if (lbl < MAX_TRANSACTIONS_PER_SESSION) {
    if (false == device.transaction[lbl].in_use) {
      transaction = NULL;
    } else {
      transaction = &(device.transaction[lbl]);
      BTIF_TRACE_DEBUG("%s: Got transaction.label: %d", __func__, lbl);
    }
  }

  return transaction;
}

/*******************************************************************************
 *
 * Function         get_transaction
 *
 * Description    Obtains the transaction details.
 *
 * Returns          bt_status_t
 ******************************************************************************/

static bt_status_t get_transaction(rc_transaction_t** ptransaction) {
  std::unique_lock<std::recursive_mutex> lock(device.lbllock);

  // Check for unused transactions
  for (uint8_t i = 0; i < MAX_TRANSACTIONS_PER_SESSION; i++) {
    if (false == device.transaction[i].in_use) {
      BTIF_TRACE_DEBUG("%s: Got transaction.label: %d", __func__,
                       device.transaction[i].lbl);
      device.transaction[i].in_use = true;
      *ptransaction = &(device.transaction[i]);
      return BT_STATUS_SUCCESS;
    }
  }
  return BT_STATUS_NOMEM;
}

/*******************************************************************************
 *
 * Function         release_transaction
 *
 * Description    Will release a transaction for reuse
 *
 * Returns          bt_status_t
 ******************************************************************************/
void release_transaction(uint8_t lbl) {
  BTIF_TRACE_DEBUG("%s %d", __func__, lbl);
  rc_transaction_t* transaction = get_transaction_by_lbl(lbl);

  /* If the transaction is in use... */
  if (transaction != NULL) {
    BTIF_TRACE_DEBUG("%s: lbl: %d", __func__, lbl);
    initialize_transaction(lbl);
  }
}

/*******************************************************************************
 *      Function       sleep_ms
 *
 *      Description    Sleep the calling thread unconditionally for
 *                     |timeout_ms| milliseconds.
 *
 *      Returns        void
 ******************************************************************************/
static void sleep_ms(period_ms_t timeout_ms) {
  struct timespec delay;
  delay.tv_sec = timeout_ms / 1000;
  delay.tv_nsec = 1000 * 1000 * (timeout_ms % 1000);

  OSI_NO_INTR(nanosleep(&delay, &delay));
}

static bool absolute_volume_disabled() {
  char volume_disabled[PROPERTY_VALUE_MAX] = {0};
  osi_property_get("persist.bluetooth.disableabsvol", volume_disabled, "false");
  if (strncmp(volume_disabled, "true", 4) == 0) {
    BTIF_TRACE_WARNING("%s: Absolute volume disabled by property", __func__);
    return true;
  }
  return false;
}