bta/av/bta_av_int.h

/******************************************************************************
 *
 *  Copyright (C) 2004-2012 Broadcom Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  This is the private interface file for the BTA advanced audio/video.
 *
 ******************************************************************************/
#ifndef BTA_AV_INT_H
#define BTA_AV_INT_H

#include "avdt_api.h"
#include "bta_api.h"
#include "bta_av_api.h"
#include "bta_av_co.h"
#include "bta_sys.h"
#include "osi/include/list.h"
#include "stack/include/a2dp_api.h"

/*****************************************************************************
 *  Constants
 ****************************************************************************/

enum {
  /* these events are handled by the AV main state machine */
  BTA_AV_API_DISABLE_EVT = BTA_SYS_EVT_START(BTA_ID_AV),
  BTA_AV_API_REMOTE_CMD_EVT,
  BTA_AV_API_VENDOR_CMD_EVT,
  BTA_AV_API_VENDOR_RSP_EVT,
  BTA_AV_API_META_RSP_EVT,
  BTA_AV_API_RC_CLOSE_EVT,
  BTA_AV_AVRC_OPEN_EVT,
  BTA_AV_AVRC_MSG_EVT,
  BTA_AV_AVRC_NONE_EVT,

  /* these events are handled by the AV stream state machine */
  BTA_AV_API_OPEN_EVT,
  BTA_AV_API_CLOSE_EVT,
  BTA_AV_AP_START_EVT, /* the following 2 events must be in the same order as
                          the *API_*EVT */
  BTA_AV_AP_STOP_EVT,
  BTA_AV_API_RECONFIG_EVT,
  BTA_AV_API_PROTECT_REQ_EVT,
  BTA_AV_API_PROTECT_RSP_EVT,
  BTA_AV_API_RC_OPEN_EVT,
  BTA_AV_SRC_DATA_READY_EVT,
  BTA_AV_CI_SETCONFIG_OK_EVT,
  BTA_AV_CI_SETCONFIG_FAIL_EVT,
  BTA_AV_SDP_DISC_OK_EVT,
  BTA_AV_SDP_DISC_FAIL_EVT,
  BTA_AV_STR_DISC_OK_EVT,
  BTA_AV_STR_DISC_FAIL_EVT,
  BTA_AV_STR_GETCAP_OK_EVT,
  BTA_AV_STR_GETCAP_FAIL_EVT,
  BTA_AV_STR_OPEN_OK_EVT,
  BTA_AV_STR_OPEN_FAIL_EVT,
  BTA_AV_STR_START_OK_EVT,
  BTA_AV_STR_START_FAIL_EVT,
  BTA_AV_STR_CLOSE_EVT,
  BTA_AV_STR_CONFIG_IND_EVT,
  BTA_AV_STR_SECURITY_IND_EVT,
  BTA_AV_STR_SECURITY_CFM_EVT,
  BTA_AV_STR_WRITE_CFM_EVT,
  BTA_AV_STR_SUSPEND_CFM_EVT,
  BTA_AV_STR_RECONFIG_CFM_EVT,
  BTA_AV_AVRC_TIMER_EVT,
  BTA_AV_AVDT_CONNECT_EVT,
  BTA_AV_AVDT_DISCONNECT_EVT,
  BTA_AV_ROLE_CHANGE_EVT,
  BTA_AV_AVDT_DELAY_RPT_EVT,
  BTA_AV_ACP_CONNECT_EVT,
  BTA_AV_API_OFFLOAD_START_EVT,
  BTA_AV_API_OFFLOAD_START_RSP_EVT,

  /* these events are handled outside of the state machine */
  BTA_AV_API_ENABLE_EVT,
  BTA_AV_API_REGISTER_EVT,
  BTA_AV_API_DEREGISTER_EVT,
  BTA_AV_API_DISCONNECT_EVT,
  BTA_AV_CI_SRC_DATA_READY_EVT,
  BTA_AV_SIG_CHG_EVT,
  BTA_AV_SIGNALLING_TIMER_EVT,
  BTA_AV_SDP_AVRC_DISC_EVT,
  BTA_AV_AVRC_CLOSE_EVT,
  BTA_AV_AVRC_BROWSE_OPEN_EVT,
  BTA_AV_AVRC_BROWSE_CLOSE_EVT,
  BTA_AV_CONN_CHG_EVT,
  BTA_AV_DEREG_COMP_EVT,
#if (AVDT_REPORTING == TRUE)
  BTA_AV_AVDT_RPT_CONN_EVT,
#endif
  BTA_AV_API_START_EVT, /* the following 2 events must be in the same order as
                           the *AP_*EVT */
  BTA_AV_API_STOP_EVT
};

/* events for AV control block state machine */
#define BTA_AV_FIRST_SM_EVT BTA_AV_API_DISABLE_EVT
#define BTA_AV_LAST_SM_EVT BTA_AV_AVRC_NONE_EVT

/* events for AV stream control block state machine */
#define BTA_AV_FIRST_SSM_EVT BTA_AV_API_OPEN_EVT

/* events that do not go through state machine */
#define BTA_AV_FIRST_NSM_EVT BTA_AV_API_ENABLE_EVT
#define BTA_AV_LAST_NSM_EVT BTA_AV_API_STOP_EVT

/* API events passed to both SSMs (by bta_av_api_to_ssm) */
#define BTA_AV_FIRST_A2S_API_EVT BTA_AV_API_START_EVT
#define BTA_AV_FIRST_A2S_SSM_EVT BTA_AV_AP_START_EVT

#define BTA_AV_LAST_EVT BTA_AV_API_STOP_EVT

/* maximum number of SEPS in stream discovery results */
#define BTA_AV_NUM_SEPS 32

/* initialization value for AVRC handle */
#define BTA_AV_RC_HANDLE_NONE 0xFF

/* size of database for service discovery */
#define BTA_AV_DISC_BUF_SIZE 1000

/* maximum length of AVDTP security data */
#define BTA_AV_SECURITY_MAX_LEN 400

/* check number of buffers queued at L2CAP when this amount of buffers are
 * queued to L2CAP */
#define BTA_AV_QUEUE_DATA_CHK_NUM L2CAP_HIGH_PRI_MIN_XMIT_QUOTA

/* the number of ACL links with AVDT */
#define BTA_AV_NUM_LINKS AVDT_NUM_LINKS

#define BTA_AV_BE_STREAM_TO_CO_ID(u32, p)                                 \
  {                                                                       \
    (u32) = (((uint32_t)(*((p) + 2))) + (((uint32_t)(*((p) + 1))) << 8) + \
             (((uint32_t)(*(p))) << 16));                                 \
    (p) += 3;                                                             \
  }

/*****************************************************************************
 *  Data types
 ****************************************************************************/

/* function types for call-out functions */
typedef bool (*tBTA_AV_CO_INIT)(btav_a2dp_codec_index_t codec_index,
                                tAVDT_CFG* p_cfg);
typedef void (*tBTA_AV_CO_DISC_RES)(tBTA_AV_HNDL hndl, uint8_t num_seps,
                                    uint8_t num_snk, uint8_t num_src,
                                    const RawAddress& addr,
                                    uint16_t uuid_local);
typedef tA2DP_STATUS (*tBTA_AV_CO_GETCFG)(tBTA_AV_HNDL hndl,
                                          uint8_t* p_codec_info,
                                          uint8_t* p_sep_info_idx, uint8_t seid,
                                          uint8_t* p_num_protect,
                                          uint8_t* p_protect_info);
typedef void (*tBTA_AV_CO_SETCFG)(tBTA_AV_HNDL hndl,
                                  const uint8_t* p_codec_info, uint8_t seid,
                                  const RawAddress& addr, uint8_t num_protect,
                                  const uint8_t* p_protect_info,
                                  uint8_t t_local_sep, uint8_t avdt_handle);
typedef void (*tBTA_AV_CO_OPEN)(tBTA_AV_HNDL hndl, uint16_t mtu);
typedef void (*tBTA_AV_CO_CLOSE)(tBTA_AV_HNDL hndl);
typedef void (*tBTA_AV_CO_START)(tBTA_AV_HNDL hndl, uint8_t* p_codec_info,
                                 bool* p_no_rtp_hdr);
typedef void (*tBTA_AV_CO_STOP)(tBTA_AV_HNDL hndl);
typedef void* (*tBTA_AV_CO_DATAPATH)(const uint8_t* p_codec_info,
                                     uint32_t* p_timestamp);
typedef void (*tBTA_AV_CO_DELAY)(tBTA_AV_HNDL hndl, uint16_t delay);
typedef void (*tBTA_AV_CO_UPDATE_MTU)(tBTA_AV_HNDL hndl, uint16_t mtu);

/* the call-out functions for one stream */
typedef struct {
  tBTA_AV_CO_INIT init;
  tBTA_AV_CO_DISC_RES disc_res;
  tBTA_AV_CO_GETCFG getcfg;
  tBTA_AV_CO_SETCFG setcfg;
  tBTA_AV_CO_OPEN open;
  tBTA_AV_CO_CLOSE close;
  tBTA_AV_CO_START start;
  tBTA_AV_CO_STOP stop;
  tBTA_AV_CO_DATAPATH data;
  tBTA_AV_CO_DELAY delay;
  tBTA_AV_CO_UPDATE_MTU update_mtu;
} tBTA_AV_CO_FUNCTS;

/* data type for BTA_AV_API_ENABLE_EVT */
typedef struct {
  BT_HDR hdr;
  tBTA_AV_CBACK* p_cback;
  tBTA_AV_FEAT features;
  tBTA_SEC sec_mask;
} tBTA_AV_API_ENABLE;

/* data type for BTA_AV_API_REGISTER_EVT */
typedef struct {
  BT_HDR hdr;
  char p_service_name[BTA_SERVICE_NAME_LEN + 1];
  uint8_t app_id;
  tBTA_AV_SINK_DATA_CBACK* p_app_sink_data_cback;
  uint16_t service_uuid;
} tBTA_AV_API_REG;

enum {
  BTA_AV_RS_NONE, /* straight API call */
  BTA_AV_RS_OK,   /* the role switch result - successful */
  BTA_AV_RS_FAIL, /* the role switch result - failed */
  BTA_AV_RS_DONE  /* the role switch is done - continue */
};
typedef uint8_t tBTA_AV_RS_RES;
/* data type for BTA_AV_API_OPEN_EVT */
typedef struct {
  BT_HDR hdr;
  RawAddress bd_addr;
  bool use_rc;
  tBTA_SEC sec_mask;
  tBTA_AV_RS_RES switch_res;
  uint16_t uuid; /* uuid of initiator */
} tBTA_AV_API_OPEN;

/* data type for BTA_AV_API_STOP_EVT */
typedef struct {
  BT_HDR hdr;
  bool suspend;
  bool flush;
  bool reconfig_stop;  // True if the stream is stopped for reconfiguration
} tBTA_AV_API_STOP;

/* data type for BTA_AV_API_DISCONNECT_EVT */
typedef struct {
  BT_HDR hdr;
  RawAddress bd_addr;
} tBTA_AV_API_DISCNT;

/* data type for BTA_AV_API_PROTECT_REQ_EVT */
typedef struct {
  BT_HDR hdr;
  uint8_t* p_data;
  uint16_t len;
} tBTA_AV_API_PROTECT_REQ;

/* data type for BTA_AV_API_PROTECT_RSP_EVT */
typedef struct {
  BT_HDR hdr;
  uint8_t* p_data;
  uint16_t len;
  uint8_t error_code;
} tBTA_AV_API_PROTECT_RSP;

/* data type for BTA_AV_API_REMOTE_CMD_EVT */
typedef struct {
  BT_HDR hdr;
  tAVRC_MSG_PASS msg;
  uint8_t label;
} tBTA_AV_API_REMOTE_CMD;

/* data type for BTA_AV_API_VENDOR_CMD_EVT and RSP */
typedef struct {
  BT_HDR hdr;
  tAVRC_MSG_VENDOR msg;
  uint8_t label;
} tBTA_AV_API_VENDOR;

/* data type for BTA_AV_API_RC_OPEN_EVT */
typedef struct { BT_HDR hdr; } tBTA_AV_API_OPEN_RC;

/* data type for BTA_AV_API_RC_CLOSE_EVT */
typedef struct { BT_HDR hdr; } tBTA_AV_API_CLOSE_RC;

/* data type for BTA_AV_API_META_RSP_EVT */
typedef struct {
  BT_HDR hdr;
  bool is_rsp;
  uint8_t label;
  tBTA_AV_CODE rsp_code;
  BT_HDR* p_pkt;
} tBTA_AV_API_META_RSP;

/* data type for BTA_AV_API_RECONFIG_EVT */
typedef struct {
  BT_HDR hdr;
  uint8_t codec_info[AVDT_CODEC_SIZE]; /* codec configuration */
  uint8_t* p_protect_info;
  uint8_t num_protect;
  bool suspend;
  uint8_t sep_info_idx;
} tBTA_AV_API_RCFG;

/* data type for BTA_AV_CI_SETCONFIG_OK_EVT and BTA_AV_CI_SETCONFIG_FAIL_EVT */
typedef struct {
  BT_HDR hdr;
  tBTA_AV_HNDL hndl;
  uint8_t err_code;
  uint8_t category;
  uint8_t num_seid;
  uint8_t* p_seid;
  bool recfg_needed;
  uint8_t avdt_handle; /* local sep type for which this stream will be set up */
} tBTA_AV_CI_SETCONFIG;

/* data type for all stream events from AVDTP */
typedef struct {
  BT_HDR hdr;
  tAVDT_CFG cfg;   /* configuration/capabilities parameters */
  tAVDT_CTRL msg;  /* AVDTP callback message parameters */
  RawAddress bd_addr; /* bd address */
  uint8_t handle;
  uint8_t avdt_event;
  bool initiator; /* true, if local device initiates the SUSPEND */
} tBTA_AV_STR_MSG;

/* data type for BTA_AV_AVRC_MSG_EVT */
typedef struct {
  BT_HDR hdr;
  tAVRC_MSG msg;
  uint8_t handle;
  uint8_t label;
  uint8_t opcode;
} tBTA_AV_RC_MSG;

/* data type for BTA_AV_AVRC_OPEN_EVT, BTA_AV_AVRC_CLOSE_EVT */
typedef struct {
  BT_HDR hdr;
  RawAddress peer_addr;
  uint8_t handle;
} tBTA_AV_RC_CONN_CHG;

/* data type for BTA_AV_CONN_CHG_EVT */
typedef struct {
  BT_HDR hdr;
  RawAddress peer_addr;
  bool is_up;
} tBTA_AV_CONN_CHG;

/* data type for BTA_AV_ROLE_CHANGE_EVT */
typedef struct {
  BT_HDR hdr;
  uint8_t new_role;
  uint8_t hci_status;
} tBTA_AV_ROLE_RES;

/* data type for BTA_AV_SDP_DISC_OK_EVT */
typedef struct {
  BT_HDR hdr;
  uint16_t avdt_version; /* AVDTP protocol version */
} tBTA_AV_SDP_RES;

/* data type for BTA_AV_API_OFFLOAD_RSP_EVT */
typedef struct {
  BT_HDR hdr;
  tBTA_AV_STATUS status;
} tBTA_AV_API_STATUS_RSP;

/* type for SEP control block */
typedef struct {
  uint8_t av_handle;                   /* AVDTP handle */
  uint8_t tsep;                        /* SEP type of local SEP */
  uint8_t codec_info[AVDT_CODEC_SIZE]; /* Codec info */
  tBTA_AV_SINK_DATA_CBACK*
      p_app_sink_data_cback; /* Sink application callback for media packets */
} tBTA_AV_SEP;

/* initiator/acceptor role for adaption */
#define BTA_AV_ROLE_AD_INT 0x00 /* initiator */
#define BTA_AV_ROLE_AD_ACP 0x01 /* acceptor */

/* initiator/acceptor signaling roles */
#define BTA_AV_ROLE_START_ACP 0x00
#define BTA_AV_ROLE_START_INT 0x10 /* do not change this value */

#define BTA_AV_ROLE_SUSPEND 0x20     /* suspending on start */
#define BTA_AV_ROLE_SUSPEND_OPT 0x40 /* Suspend on Start option is set */

/* union of all event datatypes */
typedef union {
  BT_HDR hdr;
  tBTA_AV_API_ENABLE api_enable;
  tBTA_AV_API_REG api_reg;
  tBTA_AV_API_OPEN api_open;
  tBTA_AV_API_STOP api_stop;
  tBTA_AV_API_DISCNT api_discnt;
  tBTA_AV_API_PROTECT_REQ api_protect_req;
  tBTA_AV_API_PROTECT_RSP api_protect_rsp;
  tBTA_AV_API_REMOTE_CMD api_remote_cmd;
  tBTA_AV_API_VENDOR api_vendor;
  tBTA_AV_API_RCFG api_reconfig;
  tBTA_AV_CI_SETCONFIG ci_setconfig;
  tBTA_AV_STR_MSG str_msg;
  tBTA_AV_RC_MSG rc_msg;
  tBTA_AV_RC_CONN_CHG rc_conn_chg;
  tBTA_AV_CONN_CHG conn_chg;
  tBTA_AV_ROLE_RES role_res;
  tBTA_AV_SDP_RES sdp_res;
  tBTA_AV_API_META_RSP api_meta_rsp;
  tBTA_AV_API_STATUS_RSP api_status_rsp;
} tBTA_AV_DATA;

typedef union {
  tBTA_AV_API_OPEN open; /* used only before open and role switch
                            is needed on another AV channel */
} tBTA_AV_Q_INFO;

#define BTA_AV_Q_TAG_OPEN 0x01   /* after API_OPEN, before STR_OPENED */
#define BTA_AV_Q_TAG_START 0x02  /* before start sending media packets */
#define BTA_AV_Q_TAG_STREAM 0x03 /* during streaming */

#define BTA_AV_WAIT_ACP_CAPS_ON 0x01 /* retriving the peer capabilities */
#define BTA_AV_WAIT_ACP_CAPS_STARTED \
  0x02 /* started while retriving peer capabilities */
#define BTA_AV_WAIT_ROLE_SW_RES_OPEN \
  0x04 /* waiting for role switch result after API_OPEN, before STR_OPENED */
#define BTA_AV_WAIT_ROLE_SW_RES_START \
  0x08 /* waiting for role switch result before streaming */
#define BTA_AV_WAIT_ROLE_SW_STARTED \
  0x10 /* started while waiting for role switch result */
#define BTA_AV_WAIT_ROLE_SW_RETRY 0x20 /* set when retry on timeout */
#define BTA_AV_WAIT_CHECK_RC \
  0x40 /* set when the timer is used by role switch */
#define BTA_AV_WAIT_ROLE_SW_FAILED 0x80 /* role switch failed */

#define BTA_AV_WAIT_ROLE_SW_BITS                                  \
  (BTA_AV_WAIT_ROLE_SW_RES_OPEN | BTA_AV_WAIT_ROLE_SW_RES_START | \
   BTA_AV_WAIT_ROLE_SW_STARTED | BTA_AV_WAIT_ROLE_SW_RETRY)

/* Bitmap for collision, coll_mask */
#define BTA_AV_COLL_INC_TMR \
  0x01 /* Timer is running for incoming L2C connection */
#define BTA_AV_COLL_API_CALLED \
  0x02 /* API open was called while incoming timer is running */

/* type for AV stream control block */
typedef struct {
  const tBTA_AV_ACT* p_act_tbl; /* the action table for stream state machine */
  const tBTA_AV_CO_FUNCTS* p_cos; /* the associated callout functions */
  bool sdp_discovery_started; /* variable to determine whether SDP is started */
  tBTA_AV_SEP seps[BTAV_A2DP_CODEC_INDEX_MAX];
  tAVDT_CFG* p_cap;  /* buffer used for get capabilities */
  list_t* a2dp_list; /* used for audio channels only */
  tBTA_AV_Q_INFO q_info;
  tAVDT_SEP_INFO sep_info[BTA_AV_NUM_SEPS]; /* stream discovery results */
  tAVDT_CFG cfg;                            /* local SEP configuration */
  alarm_t* avrc_ct_timer;                   /* delay timer for AVRC CT */
  RawAddress peer_addr;                     /* peer BD address */
  uint16_t l2c_cid;                         /* L2CAP channel ID */
  uint16_t stream_mtu;                      /* MTU of stream */
  uint16_t avdt_version;      /* the avdt version of peer device */
  tBTA_SEC sec_mask;          /* security mask */
  uint8_t media_type;         /* Media type: AVDT_MEDIA_TYPE_* */
  bool cong;                  /* true if AVDTP congested */
  tBTA_AV_STATUS open_status; /* open failure status */
  tBTA_AV_CHNL chnl;          /* the channel: audio/video */
  tBTA_AV_HNDL hndl;          /* the handle: ((hdi + 1)|chnl) */
  uint16_t cur_psc_mask;      /* Protocol service capabilities mask for current
                                 connection */
  uint8_t avdt_handle;        /* AVDTP handle */
  uint8_t hdi;                /* the index to SCB[] */
  uint8_t num_seps;           /* number of seps returned by stream discovery */
  uint8_t num_disc_snks;      /* number of discovered snks */
  uint8_t num_disc_srcs;      /* number of discovered srcs */
  uint8_t sep_info_idx;       /* current index into sep_info */
  uint8_t sep_idx;            /* current index into local seps[] */
  uint8_t rcfg_idx;           /* reconfig requested index into sep_info */
  uint8_t state;              /* state machine state */
  uint8_t avdt_label;         /* AVDTP label */
  uint8_t app_id;             /* application id */
  uint8_t num_recfg;          /* number of reconfigure sent */
  uint8_t role;
  uint8_t l2c_bufs;  /* the number of buffers queued to L2CAP */
  uint8_t rc_handle; /* connected AVRCP handle */
  bool use_rc;       /* true if AVRCP is allowed */
  bool started;      /* true if stream started */
  A2dpCodecConfig* current_codec; /* The current A2DP codec */
  uint8_t
      co_started;    /* non-zero, if stream started from call-out perspective */
  bool recfg_sup;    /* true if the first attempt to reconfigure the stream was
                        successfull, else False if command fails */
  bool suspend_sup;  /* true if Suspend stream is supported, else false if
                        suspend command fails */
  bool deregistring; /* true if deregistering */
  bool sco_suspend;  /* true if SUSPEND is issued automatically for SCO */
  uint8_t coll_mask; /* Mask to check incoming and outgoing collision */
  tBTA_AV_API_OPEN open_api; /* Saved OPEN api message */
  uint8_t wait;  /* set 0x1, when getting Caps as ACP, set 0x2, when started */
  uint8_t q_tag; /* identify the associated q_info union member */
  bool no_rtp_hdr;   /* true if add no RTP header*/
  uint16_t uuid_int; /*intended UUID of Initiator to connect to */
  bool offload_start_pending;
  bool skip_sdp; /* Decides if sdp to be done prior to profile connection */
} tBTA_AV_SCB;

#define BTA_AV_RC_ROLE_MASK 0x10
#define BTA_AV_RC_ROLE_INT 0x00
#define BTA_AV_RC_ROLE_ACP 0x10

#define BTA_AV_RC_CONN_MASK 0x20

/* type for AV RCP control block */
/* index to this control block is the rc handle */
typedef struct {
  uint8_t status;
  uint8_t handle;
  uint8_t shdl;               /* stream handle (hdi + 1) */
  uint8_t lidx;               /* (index+1) to LCB */
  tBTA_AV_FEAT peer_features; /* peer features mask */
} tBTA_AV_RCB;
#define BTA_AV_NUM_RCB (BTA_AV_NUM_STRS + 2)

enum { BTA_AV_LCB_FREE, BTA_AV_LCB_FIND };

/* type for AV ACL Link control block */
typedef struct {
  RawAddress addr;  /* peer BD address */
  uint8_t conn_msk; /* handle mask of connected stream handle */
  uint8_t lidx;     /* index + 1 */
} tBTA_AV_LCB;

/* type for stream state machine action functions */
typedef void (*tBTA_AV_SACT)(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);

/* type for AV control block */
typedef struct {
  tBTA_AV_SCB* p_scb[BTA_AV_NUM_STRS];   /* stream control block */
  tSDP_DISCOVERY_DB* p_disc_db;          /* pointer to discovery database */
  tBTA_AV_CBACK* p_cback;                /* application callback function */
  tBTA_AV_RCB rcb[BTA_AV_NUM_RCB];       /* RCB control block */
  tBTA_AV_LCB lcb[BTA_AV_NUM_LINKS + 1]; /* link control block */
  alarm_t* link_signalling_timer;
  alarm_t*
      accept_signalling_timer;  /* timer to monitor signalling when accepting */
  uint32_t sdp_a2dp_handle;     /* SDP record handle for audio src */
  uint32_t sdp_a2dp_snk_handle; /* SDP record handle for audio snk */
  uint32_t sdp_vdp_handle;      /* SDP record handle for video src */
  tBTA_AV_FEAT features;        /* features mask */
  tBTA_SEC sec_mask;            /* security mask */
  tBTA_AV_HNDL handle;          /* the handle for SDP activity */
  bool disabling;               /* true if api disabled called */
  uint8_t
      disc; /* (hdi+1) or (rc_handle|BTA_AV_CHNL_MSK) if p_disc_db is in use */
  uint8_t state;          /* state machine state */
  uint8_t conn_rc;        /* handle mask of connected RCP channels */
  uint8_t conn_audio;     /* handle mask of connected audio channels */
  uint8_t conn_video;     /* handle mask of connected video channels */
  uint8_t conn_lcb;       /* index mask of used LCBs */
  uint8_t audio_open_cnt; /* number of connected audio channels */
  uint8_t reg_audio;      /* handle mask of registered audio channels */
  uint8_t reg_video;      /* handle mask of registered video channels */
  uint8_t rc_acp_handle;
  uint8_t rc_acp_idx; /* (index + 1) to RCB */
  uint8_t rs_idx;    /* (index + 1) to SCB for the one waiting for RS on open */
  bool sco_occupied; /* true if SCO is being used or call is in progress */
  uint8_t audio_streams; /* handle mask of streaming audio channels */
  uint8_t video_streams; /* handle mask of streaming video channels */
} tBTA_AV_CB;

/*****************************************************************************
 *  Global data
 ****************************************************************************/

/* control block declaration */
extern tBTA_AV_CB bta_av_cb;

/* config struct */
extern tBTA_AV_CFG* p_bta_av_cfg;
extern const tBTA_AV_CFG bta_avk_cfg;
extern const tBTA_AV_CFG bta_av_cfg;
extern const tBTA_AV_CFG bta_av_cfg_compatibility;

/* rc id config struct */
extern uint16_t* p_bta_av_rc_id;
extern uint16_t* p_bta_av_rc_id_ac;

extern const tBTA_AV_SACT bta_av_a2dp_action[];
extern const tBTA_AV_CO_FUNCTS bta_av_a2dp_cos;
extern tAVDT_CTRL_CBACK* const bta_av_dt_cback[];
extern void bta_av_sink_data_cback(uint8_t handle, BT_HDR* p_pkt,
                                   uint32_t time_stamp, uint8_t m_pt);

/*****************************************************************************
 *  Function prototypes
 ****************************************************************************/
/* utility functions */
extern tBTA_AV_SCB* bta_av_hndl_to_scb(uint16_t handle);
extern bool bta_av_chk_start(tBTA_AV_SCB* p_scb);
extern void bta_av_restore_switch(void);
extern uint16_t bta_av_chk_mtu(tBTA_AV_SCB* p_scb, uint16_t mtu);
extern void bta_av_conn_cback(uint8_t handle, const RawAddress* bd_addr,
                              uint8_t event, tAVDT_CTRL* p_data);
extern uint8_t bta_av_rc_create(tBTA_AV_CB* p_cb, uint8_t role, uint8_t shdl,
                                uint8_t lidx);
extern void bta_av_stream_chg(tBTA_AV_SCB* p_scb, bool started);
extern bool bta_av_is_scb_opening(tBTA_AV_SCB* p_scb);
extern bool bta_av_is_scb_incoming(tBTA_AV_SCB* p_scb);
extern void bta_av_set_scb_sst_init(tBTA_AV_SCB* p_scb);
extern bool bta_av_is_scb_init(tBTA_AV_SCB* p_scb);
extern void bta_av_set_scb_sst_incoming(tBTA_AV_SCB* p_scb);
extern tBTA_AV_LCB* bta_av_find_lcb(const RawAddress& addr, uint8_t op);

/* main functions */
extern void bta_av_api_deregister(tBTA_AV_DATA* p_data);
extern void bta_av_dup_audio_buf(tBTA_AV_SCB* p_scb, BT_HDR* p_buf);
extern void bta_av_sm_execute(tBTA_AV_CB* p_cb, uint16_t event,
                              tBTA_AV_DATA* p_data);
extern void bta_av_ssm_execute(tBTA_AV_SCB* p_scb, uint16_t event,
                               tBTA_AV_DATA* p_data);
extern bool bta_av_hdl_event(BT_HDR* p_msg);
extern const char* bta_av_evt_code(uint16_t evt_code);
extern bool bta_av_switch_if_needed(tBTA_AV_SCB* p_scb);
extern bool bta_av_link_role_ok(tBTA_AV_SCB* p_scb, uint8_t bits);
extern bool bta_av_is_rcfg_sst(tBTA_AV_SCB* p_scb);

/* nsm action functions */
extern void bta_av_api_disconnect(tBTA_AV_DATA* p_data);
extern void bta_av_sig_chg(tBTA_AV_DATA* p_data);
extern void bta_av_signalling_timer(tBTA_AV_DATA* p_data);
extern void bta_av_rc_disc_done(tBTA_AV_DATA* p_data);
extern void bta_av_rc_closed(tBTA_AV_DATA* p_data);
extern void bta_av_rc_browse_opened(tBTA_AV_DATA* p_data);
extern void bta_av_rc_browse_closed(tBTA_AV_DATA* p_data);
extern void bta_av_rc_disc(uint8_t disc);
extern void bta_av_conn_chg(tBTA_AV_DATA* p_data);
extern void bta_av_dereg_comp(tBTA_AV_DATA* p_data);

/* sm action functions */
extern void bta_av_disable(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_opened(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_remote_cmd(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_vendor_cmd(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_vendor_rsp(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_msg(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_close(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_meta_rsp(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_free_rsp(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);
extern void bta_av_rc_free_browse_msg(tBTA_AV_CB* p_cb, tBTA_AV_DATA* p_data);

extern tBTA_AV_RCB* bta_av_get_rcb_by_shdl(uint8_t shdl);
extern void bta_av_del_rc(tBTA_AV_RCB* p_rcb);

/* ssm action functions */
extern void bta_av_do_disc_a2dp(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_cleanup(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_free_sdb(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_config_ind(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_disconnect_req(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_security_req(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_security_rsp(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_setconfig_rsp(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_str_opened(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_security_ind(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_security_cfm(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_do_close(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_connect_req(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_sdp_failed(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_disc_results(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_disc_res_as_acp(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_open_failed(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_getcap_results(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_setconfig_rej(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_discover_req(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_conn_failed(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_do_start(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_str_stopped(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_reconfig(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_data_path(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_start_ok(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_start_failed(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_str_closed(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_clr_cong(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_suspend_cfm(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rcfg_str_ok(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rcfg_failed(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rcfg_connect(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rcfg_discntd(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_suspend_cont(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rcfg_cfm(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rcfg_open(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_security_rej(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_open_rc(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_chk_2nd_start(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_save_caps(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rej_conn(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_rej_conn(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_set_use_rc(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_cco_close(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_switch_role(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_role_res(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_delay_co(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_open_at_inc(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_offload_req(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);
extern void bta_av_offload_rsp(tBTA_AV_SCB* p_scb, tBTA_AV_DATA* p_data);

#endif /* BTA_AV_INT_H */