text: /*
   * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
   *
   * SPDX-License-Identifier: Apache-2.0
   */
  
  /******************************************************************************
   **
   **  Name:          btc_hf_client.c
   **
   ******************************************************************************/
  #include "common/bt_target.h"
  #include "common/bt_trace.h"
  #include <stdint.h>
  #include <stdlib.h>
  #include <string.h>
  #include <stdlib.h>
  #include "common/bt_defs.h"
  #include "device/bdaddr.h"
  #include "btc/btc_dm.h"
  #include "btc_hf_client.h"
  #include "btc/btc_profile_queue.h"
  #include "osi/allocator.h"
  #include "btc/btc_manage.h"
  #include "btc/btc_util.h"
  #include "esp_hf_client_api.h"
  #include "bta/bta_hf_client_api.h"
  #include "esp_bt.h"
  #include <assert.h>
  
  #if (BTC_HF_CLIENT_INCLUDED == TRUE)
  
  /************************************************************************************
  **  Constants & Macros
  ************************************************************************************/
  
  #ifndef BTC_HF_CLIENT_SERVICE_NAME
  #define BTC_HF_CLIENT_SERVICE_NAME ("Handsfree")
  #endif
  
  #ifndef BTC_HF_CLIENT_SECURITY
  #define BTC_HF_CLIENT_SECURITY    (BTA_SEC_AUTHENTICATE | BTA_SEC_ENCRYPT)
  #endif
  
  #ifndef BTC_HF_CLIENT_FEATURES
  #define BTC_HF_CLIENT_FEATURES   ( BTA_HF_CLIENT_FEAT_ECNR    | \
                                      BTA_HF_CLIENT_FEAT_3WAY   | \
                                      BTA_HF_CLIENT_FEAT_CLI    | \
                                      BTA_HF_CLIENT_FEAT_VREC   | \
                                      BTA_HF_CLIENT_FEAT_VOL    | \
                                      BTA_HF_CLIENT_FEAT_ECS    | \
                                      BTA_HF_CLIENT_FEAT_ECC    | \
                                      BTA_HF_CLIENT_FEAT_CODEC)
  #endif
  
  
  
  /************************************************************************************
  **  Static variables
  ************************************************************************************/
  const int btc_hf_client_version = HFP_HF_VERSION_1_7;
  
  #if HFP_DYNAMIC_MEMORY == FALSE
  static hf_client_local_param_t hf_client_local_param;
  #else
  hf_client_local_param_t *hf_client_local_param_ptr;
  #endif
  
  /************************************************************************************
  **  Static functions
  ************************************************************************************/
  #define CHECK_HF_CLIENT_INIT() do { \
  if (! hf_client_local_param.btc_hf_client_cb.initialized) { \
      return BT_STATUS_NOT_READY; \
  } \
  } while (0)
  
  #define CHECK_HF_CLIENT_SLC_CONNECTED() do { \
  if (! hf_client_local_param.btc_hf_client_cb.initialized || \
      hf_client_local_param.btc_hf_client_cb.state != ESP_HF_CLIENT_CONNECTION_STATE_SLC_CONNECTED) { \
      return BT_STATUS_NOT_READY; \
  } \
  } while (0)
  
  static inline void btc_hf_client_cb_to_app(esp_hf_client_cb_event_t event, esp_hf_client_cb_param_t *param)
  {
      esp_hf_client_cb_t btc_hf_client_callback = (esp_hf_client_cb_t)btc_profile_cb_get(BTC_PID_HF_CLIENT);
      if (btc_hf_client_callback) {
          btc_hf_client_callback(event, param);
      }
  }
  
  static void clear_state(void)
  {
      memset(&hf_client_local_param.btc_hf_client_cb, 0, sizeof(btc_hf_client_cb_t));
  }
  
  static BOOLEAN is_connected(bt_bdaddr_t *bd_addr)
  {
      if (((hf_client_local_param.btc_hf_client_cb.state == ESP_HF_CLIENT_CONNECTION_STATE_CONNECTED) ||
              (hf_client_local_param.btc_hf_client_cb.state == ESP_HF_CLIENT_CONNECTION_STATE_SLC_CONNECTED))&&
          ((bd_addr == NULL) || (bdcmp(bd_addr->address, hf_client_local_param.btc_hf_client_cb.connected_bda.address) == 0)))
          return TRUE;
      return FALSE;
  }
  
  void btc_hf_client_reg_data_cb(esp_hf_client_incoming_data_cb_t recv,
                                 esp_hf_client_outgoing_data_cb_t send)
  {
      hf_client_local_param.btc_hf_client_incoming_data_cb = recv;
      hf_client_local_param.btc_hf_client_outgoing_data_cb = send;
  }
  
  void btc_hf_client_incoming_data_cb_to_app(const uint8_t *data, uint32_t len)
  {
      // todo: critical section protection
      if (hf_client_local_param.btc_hf_client_incoming_data_cb) {
          hf_client_local_param.btc_hf_client_incoming_data_cb(data, len);
      }
  }
  
  uint32_t btc_hf_client_outgoing_data_cb_to_app(uint8_t *data, uint32_t len)
  {
      // todo: critical section protection
      if (hf_client_local_param.btc_hf_client_outgoing_data_cb) {
          return hf_client_local_param.btc_hf_client_outgoing_data_cb(data, len);
      } else {
          return 0;
      }
  }
  
  /*****************************************************************************
  **
  **   btc hf api functions
  **
  *****************************************************************************/
  
  /*******************************************************************************
  **
  ** Function        btc_hf_client_init
  **
  ** Description     initializes the hf interface
  **
  ** Returns         bt_status_t
  **
  *******************************************************************************/
  bt_status_t btc_hf_client_init(void)
  {
      BTC_TRACE_EVENT("%s", __FUNCTION__);
  
      uint8_t data_path;
      btc_dm_enable_service(BTA_HFP_HS_SERVICE_ID);
  
      clear_state();
  
      hf_client_local_param.btc_hf_client_cb.initialized = true;
  
  #if BTM_SCO_HCI_INCLUDED
      data_path = ESP_SCO_DATA_PATH_HCI;
  #else
      data_path = ESP_SCO_DATA_PATH_PCM;
  #endif
      esp_bredr_sco_datapath_set(data_path);
      return BT_STATUS_SUCCESS;
  }
  
  
  /*******************************************************************************
  **
  ** Function        btc_hf_client_connect
  **
  ** Description     connect to audio gateway
  **
  ** Returns         bt_status_t
  **
  *******************************************************************************/
  static bt_status_t connect_int( bt_bdaddr_t *bd_addr, uint16_t uuid )
  {
      if (is_connected(bd_addr)) {
          return BT_STATUS_BUSY;
      }
  
      hf_client_local_param.btc_hf_client_cb.state = ESP_HF_CLIENT_CONNECTION_STATE_CONNECTING;
      bdcpy(hf_client_local_param.btc_hf_client_cb.connected_bda.address, bd_addr->address);
  
      BTA_HfClientOpen(hf_client_local_param.btc_hf_client_cb.handle, hf_client_local_param.btc_hf_client_cb.connected_bda.address,
                 BTC_HF_CLIENT_SECURITY);
  
      return BT_STATUS_SUCCESS;
  }
  
  
  bt_status_t btc_hf_client_connect( bt_bdaddr_t *bd_addr )
  {
      BTC_TRACE_EVENT("HFP Client version is  0x%04x", btc_hf_client_version);
      CHECK_HF_CLIENT_INIT();
      return btc_queue_connect(UUID_SERVCLASS_HF_HANDSFREE, bd_addr, connect_int);
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_deinit
  **
  ** Description      Closes the HF interface
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  void  btc_hf_client_deinit( void )
  {
      BTC_TRACE_EVENT("%s", __FUNCTION__);
  
      btc_dm_disable_service(BTA_HFP_HS_SERVICE_ID);
  
      hf_client_local_param.btc_hf_client_cb.initialized = false;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_disconnect
  **
  ** Description      disconnect from audio gateway
  **
  ** Returns         bt_status_t
  **
  *******************************************************************************/
  bt_status_t btc_hf_client_disconnect( bt_bdaddr_t *bd_addr )
  {
      CHECK_HF_CLIENT_INIT();
  
      if (is_connected(bd_addr))
      {
          BTA_HfClientClose(hf_client_local_param.btc_hf_client_cb.handle);
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_FAIL;
  }
  
  /*******************************************************************************
  **
  ** Function        btc_hf_client_connect_audio
  **
  ** Description     create an audio connection
  **
  ** Returns         bt_status_t
  **
  *******************************************************************************/
  bt_status_t btc_hf_client_connect_audio( bt_bdaddr_t *bd_addr )
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (is_connected(bd_addr))
      {
          if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_CODEC)
          {
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BCC, 0, 0, NULL);
          }
          else
          {
              BTA_HfClientAudioOpen(hf_client_local_param.btc_hf_client_cb.handle);
          }
  
          /* Inform the application that the audio connection has been initiated successfully */
          do {
              esp_hf_client_cb_param_t param;
              memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
              param.audio_stat.state = ESP_HF_CLIENT_AUDIO_STATE_CONNECTING;
              memcpy(param.audio_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda, sizeof(esp_bd_addr_t));
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_AUDIO_STATE_EVT, &param);
          } while (0);
  
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_FAIL;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_disconnect_audio
  **
  ** Description      close the audio connection
  **
  ** Returns         bt_status_t
  **
  *******************************************************************************/
  bt_status_t btc_hf_client_disconnect_audio( bt_bdaddr_t *bd_addr )
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (is_connected(bd_addr))
      {
          BTA_HfClientAudioClose(hf_client_local_param.btc_hf_client_cb.handle);
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_FAIL;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_start_voice_recognition
  **
  ** Description      start voice recognition
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_start_voice_recognition(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_FEAT_VREC)
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BVRA, 1, 0, NULL);
  
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_UNSUPPORTED;
  }
  
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_stop_voice_recognition
  **
  ** Description      stop voice recognition
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_stop_voice_recognition(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_FEAT_VREC)
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BVRA, 0, 0, NULL);
  
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_UNSUPPORTED;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_volume_update
  **
  ** Description      volume update
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_volume_update(esp_hf_volume_control_target_t type, int volume)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      switch (type)
      {
          case ESP_HF_VOLUME_CONTROL_TARGET_SPK:
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_VGS, volume, 0, NULL);
              break;
          case ESP_HF_VOLUME_CONTROL_TARGET_MIC:
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_VGM, volume, 0, NULL);
              break;
          default:
              return BT_STATUS_UNSUPPORTED;
      }
  
      return BT_STATUS_SUCCESS;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_dial
  **
  ** Description      place a call
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_dial(const char *number)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (strlen(number) != 0)
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_ATD, 0, 0, number);
      }
      else
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BLDN, 0, 0, NULL);
      }
  
      return BT_STATUS_SUCCESS;
  }
  
  /*******************************************************************************
  **
  ** Function         dial_memory
  **
  ** Description      place a call with number specified by location (speed dial)
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_dial_memory(int location)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_ATD, location, 0, NULL);
  
      return BT_STATUS_SUCCESS;
  }
  
  static bt_status_t btc_hf_client_send_chld_cmd(esp_hf_chld_type_t type, int idx)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      switch (type)
      {
      case ESP_HF_CHLD_TYPE_REL:
          if (hf_client_local_param.btc_hf_client_cb.chld_feat & BTA_HF_CLIENT_CHLD_REL)
          {
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 0, 0, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
      case ESP_HF_CHLD_TYPE_REL_ACC:
          // CHLD 1 is mandatory for 3 way calling
          if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_FEAT_3WAY)
          {
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 1, 0, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
      case ESP_HF_CHLD_TYPE_HOLD_ACC:
          // CHLD 2 is mandatory for 3 way calling
          if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_FEAT_3WAY)
          {
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 2, 0, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
      case ESP_HF_CHLD_TYPE_MERGE:
          if (hf_client_local_param.btc_hf_client_cb.chld_feat & BTA_HF_CLIENT_CHLD_MERGE)
          {
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 3, 0, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
      case ESP_HF_CHLD_TYPE_MERGE_DETACH:
          if (hf_client_local_param.btc_hf_client_cb.chld_feat & BTA_HF_CLIENT_CHLD_MERGE_DETACH)
          {
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 4, 0, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
      case ESP_HF_CHLD_TYPE_REL_X:
          if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_ECC)
          {
              if (idx < 1)
              {
                  return BT_STATUS_FAIL;
              }
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 1, idx, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
      case ESP_HF_CHLD_TYPE_PRIV_X:
          if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_ECC)
          {
              if (idx < 1)
              {
                  return BT_STATUS_FAIL;
              }
              BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHLD, 2, idx, NULL);
              break;
          }
          return BT_STATUS_UNSUPPORTED;
  
      }
      return BT_STATUS_SUCCESS;
  }
  
  static bt_status_t btc_hf_client_send_btrh_cmd(esp_hf_btrh_cmd_t btrh)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      switch (btrh) {
      case ESP_HF_BTRH_CMD_HOLD:
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BTRH, 0, 0, NULL);
          break;
      case ESP_HF_BTRH_CMD_ACCEPT:
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BTRH, 1, 0, NULL);
          break;
      case ESP_HF_BTRH_CMD_REJECT:
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BTRH, 2, 0, NULL);
          break;
      default:
          return BT_STATUS_FAIL;
      }
  
      return BT_STATUS_SUCCESS;
  }
  
  static bt_status_t btc_hf_client_answer_call(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
      BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_ATA, 0, 0, NULL);
      return BT_STATUS_SUCCESS;
  }
  
  static bt_status_t btc_hf_client_reject_call(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
      BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CHUP, 0, 0, NULL);
      return BT_STATUS_SUCCESS;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_query_current_calls
  **
  ** Description      query list of current calls
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_query_current_calls(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_ECS)
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CLCC, 0, 0, NULL);
  
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_UNSUPPORTED;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_query_current_operator_name
  **
  ** Description      query current selected operator name
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_query_current_operator_name(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_COPS, 0, 0, NULL);
  
      return BT_STATUS_SUCCESS;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_retieve_subscriber_info
  **
  ** Description      retrieve subscriber number information
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_retrieve_subscriber_info(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_CNUM, 0, 0, NULL);
  
      return BT_STATUS_SUCCESS;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_send_dtmf
  **
  ** Description      send dtmf
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_send_dtmf(char code)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_VTS, code, 0, NULL);
  
      return BT_STATUS_SUCCESS;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_request_last_voice_tag_number
  **
  ** Description      Request number from AG for VR purposes
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_request_last_voice_tag_number(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_VTAG)
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_BINP, 1, 0, NULL);
  
          return BT_STATUS_SUCCESS;
      }
  
      return BT_STATUS_UNSUPPORTED;
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_send_nrec
  **
  ** Description      Request AG to disable echo cancellation & noise reduction
  **
  ** Returns          bt_status_t
  **
  *******************************************************************************/
  static bt_status_t btc_hf_client_send_nrec(void)
  {
      CHECK_HF_CLIENT_SLC_CONNECTED();
  
      if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_FEAT_ECNR)
      {
          BTA_HfClientSendAT(hf_client_local_param.btc_hf_client_cb.handle, BTA_HF_CLIENT_AT_CMD_NREC, 0, 0, NULL);
          return BT_STATUS_SUCCESS;
      }
      return BT_STATUS_UNSUPPORTED;
  }
  
  /*******************************************************************************
  **
  ** Function         bte_hf_client_evt
  **
  ** Description      Switches context from BTE to BTIF for all HF Client events
  **
  ** Returns          void
  **
  *******************************************************************************/
  static void bte_hf_client_evt(tBTA_HF_CLIENT_EVT event, void *p_data)
  {
      bt_status_t stat;
      btc_msg_t msg;
      int arg_len = BTA_HfClientGetCbDataSize(event);
      void *arg = (p_data != NULL && arg_len > 0) ? p_data : NULL;
  
      msg.sig = BTC_SIG_API_CB;
      msg.pid = BTC_PID_HF_CLIENT;
      msg.act = (uint8_t) event;
  
      stat = btc_transfer_context(&msg, arg, arg_len, NULL);
  
      if (stat) {
          BTC_TRACE_ERROR("%s transfer failed\n", __func__);
      }
  }
  
  /*******************************************************************************
  **
  ** Function         btc_hf_client_execute_service
  **
  ** Description      Initializes/Shuts down the service
  **
  ** Returns          BT_STATUS_SUCCESS on success, BT_STATUS_FAIL otherwise
  **
  *******************************************************************************/
  bt_status_t btc_hf_client_execute_service(BOOLEAN b_enable)
  {
      BTC_TRACE_EVENT("%s enable:%d", __FUNCTION__, b_enable);
  
      if (b_enable)
      {
          /* Enable and register with BTA-HFClient */
          BTA_HfClientEnable(bte_hf_client_evt);
          hf_client_local_param.btc_hf_client_features = BTC_HF_CLIENT_FEATURES;
          if (btc_hf_client_version >= HFP_HF_VERSION_1_7)
          {
              hf_client_local_param.btc_hf_client_features |= BTA_HF_CLIENT_FEAT_ESCO_S4;
              BTC_TRACE_EVENT("eSCO S4 Setting Supported");
  
          }
          else if (btc_hf_client_version >= HFP_HF_VERSION_1_6)
          {
              BTC_TRACE_EVENT("No eSCO S4 Setting Supported");
          }
          else
          {
              BTC_TRACE_EVENT("No Codec Nego Supported");
              hf_client_local_param.btc_hf_client_features = hf_client_local_param.btc_hf_client_features & (~BTA_HF_CLIENT_FEAT_CODEC);
          }
          BTC_TRACE_EVENT("hf_client_local_param.btc_hf_client_features is   %d", hf_client_local_param.btc_hf_client_features);
          BTA_HfClientRegister(BTC_HF_CLIENT_SECURITY, hf_client_local_param.btc_hf_client_features,
                      BTC_HF_CLIENT_SERVICE_NAME);
      }
      else
      {
          BTA_HfClientDeregister(hf_client_local_param.btc_hf_client_cb.handle);
          BTA_HfClientDisable();
      }
      return BT_STATUS_SUCCESS;
  }
  
  static void process_ind_evt(tBTA_HF_CLIENT_IND *ind)
  {
      esp_hf_client_cb_param_t param;
      memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
  
      switch (ind->type)
      {
          case BTA_HF_CLIENT_IND_CALL:
              param.call.status = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_CALL_EVT, &param);
              break;
  
          case BTA_HF_CLIENT_IND_CALLSETUP:
              param.call_setup.status = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_CALL_SETUP_EVT, &param);
              break;
          case BTA_HF_CLIENT_IND_CALLHELD:
              param.call_held.status = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_CALL_HELD_EVT, &param);
              break;
  
          case BTA_HF_CLIENT_IND_SERVICE:
              param.service_availability.status = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_SERVICE_AVAILABILITY_EVT, &param);
              break;
  
          case BTA_HF_CLIENT_IND_SIGNAL:
              param.signal_strength.value = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_SIGNAL_STRENGTH_EVT, &param);
              break;
  
          case BTA_HF_CLIENT_IND_ROAM:
              param.roaming.status = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_ROAMING_STATUS_EVT, &param);
              break;
  
          case BTA_HF_CLIENT_IND_BATTCH:
              param.battery_level.value = ind->value;
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_CIND_BATTERY_LEVEL_EVT, &param);
              break;
  
          default:
              break;
      }
  }
  
  void btc_hf_client_cb_handler(btc_msg_t *msg)
  {
      uint16_t event = msg->act;
      tBTA_HF_CLIENT *p_data = (tBTA_HF_CLIENT *)msg->arg;
      esp_hf_client_cb_param_t param;
      bdstr_t bdstr;
  
      switch (event)
      {
          case BTA_HF_CLIENT_ENABLE_EVT:
          case BTA_HF_CLIENT_DISABLE_EVT:
              break;
          case BTA_HF_CLIENT_REGISTER_EVT:
              hf_client_local_param.btc_hf_client_cb.handle = p_data->reg.handle;
              break;
          case BTA_HF_CLIENT_OPEN_EVT:
              if (p_data->open.status == BTA_HF_CLIENT_SUCCESS)
              {
                  bdcpy(hf_client_local_param.btc_hf_client_cb.connected_bda.address, p_data->open.bd_addr);
                  hf_client_local_param.btc_hf_client_cb.state = ESP_HF_CLIENT_CONNECTION_STATE_CONNECTED;
                  hf_client_local_param.btc_hf_client_cb.peer_feat = 0;
                  hf_client_local_param.btc_hf_client_cb.chld_feat = 0;
                  //clear_phone_state();
              }
              else if (hf_client_local_param.btc_hf_client_cb.state == ESP_HF_CLIENT_CONNECTION_STATE_CONNECTING)
              {
                  hf_client_local_param.btc_hf_client_cb.state = ESP_HF_CLIENT_CONNECTION_STATE_DISCONNECTED;
              }
              else
              {
                  BTC_TRACE_WARNING("%s: HF CLient open failed, but another device connected. status=%d state=%d connected device=%s",
                          __FUNCTION__, p_data->open.status, hf_client_local_param.btc_hf_client_cb.state, bdaddr_to_string(&hf_client_local_param.btc_hf_client_cb.connected_bda, bdstr, sizeof(bdstr)));
                  UNUSED(bdstr);
                  break;
              }
  
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.conn_stat.state = hf_client_local_param.btc_hf_client_cb.state;
                  param.conn_stat.peer_feat = 0;
                  param.conn_stat.chld_feat = 0;
  
                  memcpy(param.conn_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda,
                         sizeof(esp_bd_addr_t));
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CONNECTION_STATE_EVT, &param);
              } while (0);
  
              if (hf_client_local_param.btc_hf_client_cb.state == ESP_HF_CLIENT_CONNECTION_STATE_DISCONNECTED)
                  bdsetany(hf_client_local_param.btc_hf_client_cb.connected_bda.address);
  
              if (p_data->open.status != BTA_HF_CLIENT_SUCCESS) {
                  btc_queue_advance();
              }
  
              break;
  
          case BTA_HF_CLIENT_CONN_EVT:
              hf_client_local_param.btc_hf_client_cb.peer_feat = p_data->conn.peer_feat;
              hf_client_local_param.btc_hf_client_cb.chld_feat = p_data->conn.chld_feat;
              hf_client_local_param.btc_hf_client_cb.state = ESP_HF_CLIENT_CONNECTION_STATE_SLC_CONNECTED;
  
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.conn_stat.state = hf_client_local_param.btc_hf_client_cb.state;
                  param.conn_stat.peer_feat = hf_client_local_param.btc_hf_client_cb.peer_feat;
                  param.conn_stat.chld_feat = hf_client_local_param.btc_hf_client_cb.chld_feat;
  
                  memcpy(param.conn_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda,
                         sizeof(esp_bd_addr_t));
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CONNECTION_STATE_EVT, &param);
              } while (0);
  
              /* Inform the application about in-band ringtone */
              if (hf_client_local_param.btc_hf_client_cb.peer_feat & BTA_HF_CLIENT_PEER_INBAND)
              {
                  do {
                      memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                      param.bsir.state =  ESP_HF_CLIENT_IN_BAND_RINGTONE_PROVIDED;
                      btc_hf_client_cb_to_app(ESP_HF_CLIENT_BSIR_EVT, &param);
                  } while (0);
              }
  
              btc_queue_advance();
              break;
  
          case BTA_HF_CLIENT_CLOSE_EVT:
              hf_client_local_param.btc_hf_client_cb.state = ESP_HF_CLIENT_CONNECTION_STATE_DISCONNECTED;
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.conn_stat.state = ESP_HF_CLIENT_CONNECTION_STATE_DISCONNECTED;
                  param.conn_stat.peer_feat = 0;
                  param.conn_stat.chld_feat = 0;
  
                  memcpy(param.conn_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda,
                         sizeof(esp_bd_addr_t));
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CONNECTION_STATE_EVT, &param);
              } while (0);
  
              bdsetany(hf_client_local_param.btc_hf_client_cb.connected_bda.address);
              hf_client_local_param.btc_hf_client_cb.peer_feat = 0;
              hf_client_local_param.btc_hf_client_cb.chld_feat = 0;
              btc_queue_advance();
              break;
          case BTA_HF_CLIENT_IND_EVT:
              process_ind_evt(&p_data->ind);
              break;
          case BTA_HF_CLIENT_MIC_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.volume_control.type = ESP_HF_VOLUME_CONTROL_TARGET_MIC;
                  param.volume_control.volume = p_data->val.value;
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_VOLUME_CONTROL_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_SPK_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.volume_control.type = ESP_HF_VOLUME_CONTROL_TARGET_SPK;
                  param.volume_control.volume = p_data->val.value;
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_VOLUME_CONTROL_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_VOICE_REC_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.bvra.value = p_data->val.value;
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_BVRA_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_OPERATOR_NAME_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.cops.name = p_data->operator.name;
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_COPS_CURRENT_OPERATOR_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_CLIP_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.clip.number = p_data->number.number;
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CLIP_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_BINP_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.binp.number = p_data->number.number;
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_BINP_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_CCWA_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.ccwa.number = p_data->number.number;
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CCWA_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_AT_RESULT_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.at_response.code = p_data->result.type;
                  param.at_response.cme = p_data->result.cme;
  
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_AT_RESPONSE_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_CLCC_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.clcc.idx = p_data->clcc.idx;
                  param.clcc.dir = p_data->clcc.inc ? ESP_HF_CURRENT_CALL_DIRECTION_INCOMING :
                      ESP_HF_CURRENT_CALL_DIRECTION_OUTGOING;
                  param.clcc.status = p_data->clcc.status;
                  param.clcc.mpty = p_data->clcc.mpty ? ESP_HF_CURRENT_CALL_MPTY_TYPE_MULTI :
                      ESP_HF_CURRENT_CALL_MPTY_TYPE_SINGLE;
                  param.clcc.number = p_data->clcc.number_present ? p_data->clcc.number : NULL;
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CLCC_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_CNUM_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.cnum.number = p_data->cnum.number;
                  if (p_data->cnum.service == 4) {
                      param.cnum.type = ESP_HF_SUBSCRIBER_SERVICE_TYPE_VOICE;
                  } else if (p_data->cnum.service == 5) {
                      param.cnum.type = ESP_HF_SUBSCRIBER_SERVICE_TYPE_FAX;
                  } else {
                      param.cnum.type = ESP_HF_SUBSCRIBER_SERVICE_TYPE_UNKNOWN;
                  }
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_CNUM_EVT, &param);
                  break;
              } while (0);
              break;
          case BTA_HF_CLIENT_BTRH_EVT:
              if (p_data->val.value <= ESP_HF_BTRH_STATUS_REJECTED) {
                  do {
                      memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                      param.btrh.status = p_data->val.value;
  
                      btc_hf_client_cb_to_app(ESP_HF_CLIENT_BTRH_EVT, &param);
                  } while (0);
              }
              break;
          case BTA_HF_CLIENT_BSIR_EVT:
              memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
              if (p_data->val.value != 0)
              {
                  param.bsir.state = ESP_HF_CLIENT_IN_BAND_RINGTONE_PROVIDED;
              }
              else
              {
                  param.bsir.state = ESP_HF_CLIENT_IN_BAND_RINGTONE_NOT_PROVIDED;
              }
              btc_hf_client_cb_to_app(ESP_HF_CLIENT_BSIR_EVT, &param);
              break;
          case BTA_HF_CLIENT_AUDIO_OPEN_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.audio_stat.state = ESP_HF_CLIENT_AUDIO_STATE_CONNECTED;
                  memcpy(param.audio_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda,
                         sizeof(esp_bd_addr_t));
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_AUDIO_STATE_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_AUDIO_MSBC_OPEN_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.audio_stat.state = ESP_HF_CLIENT_AUDIO_STATE_CONNECTED_MSBC;
                  memcpy(param.audio_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda,
                         sizeof(esp_bd_addr_t));
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_AUDIO_STATE_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_AUDIO_CLOSE_EVT:
              do {
                  memset(&param, 0, sizeof(esp_hf_client_cb_param_t));
                  param.audio_stat.state = ESP_HF_CLIENT_AUDIO_STATE_DISCONNECTED;
                  memcpy(param.audio_stat.remote_bda, &hf_client_local_param.btc_hf_client_cb.connected_bda,
                         sizeof(esp_bd_addr_t));
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_AUDIO_STATE_EVT, &param);
              } while (0);
              break;
          case BTA_HF_CLIENT_RING_INDICATION:
              do {
                  btc_hf_client_cb_to_app(ESP_HF_CLIENT_RING_IND_EVT, NULL);
              } while (0);
              break;
          default:
              BTC_TRACE_WARNING("%s: Unhandled event: %d", __FUNCTION__, event);
              break;
      }
  }
  
  void btc_hf_client_call_handler(btc_msg_t *msg)
  {
      btc_hf_client_args_t *arg = (btc_hf_client_args_t *)(msg->arg);
      switch (msg->act) {
  
      case BTC_HF_CLIENT_INIT_EVT:
          btc_hf_client_init();
          break;
      case BTC_HF_CLIENT_DEINIT_EVT:
          btc_hf_client_deinit();
          break;
      case BTC_HF_CLIENT_CONNECT_EVT:
          btc_hf_client_connect(&arg->connect);
          break;
      case BTC_HF_CLIENT_DISCONNECT_EVT:
          btc_hf_client_disconnect(&arg->disconnect);
          break;
      case BTC_HF_CLIENT_CONNECT_AUDIO_EVT:
          btc_hf_client_connect_audio(&arg->connect_audio);
          break;
      case BTC_HF_CLIENT_DISCONNECT_AUDIO_EVT:
          btc_hf_client_disconnect_audio(&arg->disconnect_audio);
          break;
      case BTC_HF_CLIENT_START_VOICE_RECOGNITION_EVT:
          btc_hf_client_start_voice_recognition();
          break;
      case BTC_HF_CLIENT_STOP_VOICE_RECOGNITION_EVT:
          btc_hf_client_stop_voice_recognition();
          break;
      case BTC_HF_CLIENT_VOLUME_UPDATE_EVT:
          btc_hf_client_volume_update(arg->volume_update.type, arg->volume_update.volume);
          break;
      case BTC_HF_CLIENT_DIAL_EVT:
          btc_hf_client_dial(arg->dial.number);
          break;
      case BTC_HF_CLIENT_DIAL_MEMORY_EVT:
          btc_hf_client_dial_memory(arg->dial_memory.location);
          break;
      case BTC_HF_CLIENT_SEND_CHLD_CMD_EVT:
          btc_hf_client_send_chld_cmd(arg->chld.type, arg->chld.idx);
          break;
      case BTC_HF_CLIENT_SEND_BTRH_CMD_EVT:
          btc_hf_client_send_btrh_cmd(arg->btrh.cmd);
          break;
      case BTC_HF_CLIENT_ANSWER_CALL_EVT:
          btc_hf_client_answer_call();
          break;
      case BTC_HF_CLIENT_REJECT_CALL_EVT:
          btc_hf_client_reject_call();
          break;
      case BTC_HF_CLIENT_QUERY_CURRENT_CALLS_EVT:
          btc_hf_client_query_current_calls();
          break;
      case BTC_HF_CLIENT_QUERY_CURRENT_OPERATOR_NAME_EVT:
          btc_hf_client_query_current_operator_name();
          break;
      case BTC_HF_CLIENT_RETRIEVE_SUBSCRIBER_INFO_EVT:
          btc_hf_client_retrieve_subscriber_info();
          break;
      case BTC_HF_CLIENT_SEND_DTMF_EVT:
          btc_hf_client_send_dtmf(arg->send_dtmf.code);
          break;
      case BTC_HF_CLIENT_REQUEST_LAST_VOICE_TAG_NUMBER_EVT:
          btc_hf_client_request_last_voice_tag_number();
          break;
      case BTC_HF_CLIENT_REGISTER_DATA_CALLBACK_EVT:
          btc_hf_client_reg_data_cb(arg->reg_data_cb.recv, arg->reg_data_cb.send);
          break;
      case BTC_HF_CLIENT_SEND_NREC_EVT:
          btc_hf_client_send_nrec();
          break;
      default:
          BTC_TRACE_WARNING("%s : unhandled event: %d\n", __FUNCTION__, msg->act);
      }
  }
  
  #endif /* #if (BTC_HF_CLIENT_INCLUDED == TRUE) */
  