android10/system/bt/bta/include/bta_av_api.h

/******************************************************************************
 *
 *  Copyright 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 public interface file for the advanced audio/video streaming
 *  (AV) subsystem of BTA, Broadcom's Bluetooth application layer for mobile
 *  phones.
 *
 ******************************************************************************/
#ifndef BTA_AV_API_H
#define BTA_AV_API_H

#include "a2dp_codec_api.h"
#include "avdt_api.h"
#include "avrc_api.h"
#include "bta_api.h"

/*****************************************************************************
 *  Constants and data types
 ****************************************************************************/
/* Set to TRUE if seperate authorization prompt desired for AVCTP besides A2DP
 * authorization */
/* Typically FALSE when AVRCP is used in conjunction with A2DP */
#ifndef BTA_AV_WITH_AVCTP_AUTHORIZATION
#define BTA_AV_WITH_AVCTP_AUTHORIZATION FALSE
#endif

/* AV status values */
#define BTA_AV_SUCCESS 0        /* successful operation */
#define BTA_AV_FAIL 1           /* generic failure */
#define BTA_AV_FAIL_SDP 2       /* service not found */
#define BTA_AV_FAIL_STREAM 3    /* stream connection failed */
#define BTA_AV_FAIL_RESOURCES 4 /* no resources */
#define BTA_AV_FAIL_ROLE 5 /* failed due to role management related issues */
#define BTA_AV_FAIL_GET_CAP \
  6 /* get capability failed due to no SEP availale on the peer  */

typedef uint8_t tBTA_AV_STATUS;

/* AV features masks */
#define BTA_AV_FEAT_RCTG 0x0001    /* remote control target */
#define BTA_AV_FEAT_RCCT 0x0002    /* remote control controller */
#define BTA_AV_FEAT_PROTECT 0x0004 /* streaming media contect protection */
#define BTA_AV_FEAT_VENDOR                                                    \
  0x0008                          /* remote control vendor dependent commands \
                                     */
#define BTA_AV_FEAT_REPORT 0x0020 /* use reporting service for VDP */
#define BTA_AV_FEAT_METADATA \
  0x0040 /* remote control Metadata Transfer command/response */
#define BTA_AV_FEAT_MULTI_AV \
  0x0080                          /* use multi-av, if controller supports it */
#define BTA_AV_FEAT_BROWSE 0x0010 /* use browsing channel */
#define BTA_AV_FEAT_MASTER 0x0100 /* stream only as master role */
#define BTA_AV_FEAT_ADV_CTRL \
  0x0200 /* remote control Advanced Control command/response */
#define BTA_AV_FEAT_DELAY_RPT 0x0400 /* allow delay reporting */
#define BTA_AV_FEAT_ACP_START \
  0x0800 /* start stream when 2nd SNK was accepted   */
#define BTA_AV_FEAT_APP_SETTING 0x2000 /* Player app setting support */

/* Internal features */
#define BTA_AV_FEAT_NO_SCO_SSPD \
  0x8000 /* Do not suspend av streaming as to AG events(SCO or Call) */

typedef uint16_t tBTA_AV_FEAT;

/* AV channel values */
#define BTA_AV_CHNL_MSK 0xC0
#define BTA_AV_CHNL_AUDIO 0x40 /* audio channel */
#define BTA_AV_CHNL_VIDEO 0x80 /* video channel */
typedef uint8_t tBTA_AV_CHNL;

#define BTA_AV_HNDL_MSK 0x3F
typedef uint8_t tBTA_AV_HNDL;
/* handle index to mask */
#define BTA_AV_HNDL_TO_MSK(h) ((uint8_t)(1 << (h)))

/* maximum number of streams created */
#ifndef BTA_AV_NUM_STRS
#define BTA_AV_NUM_STRS 6
#endif

/* operation id list for BTA_AvRemoteCmd */
typedef uint8_t tBTA_AV_RC;

/* state flag for pass through command */
typedef uint8_t tBTA_AV_STATE;

/* command codes for BTA_AvVendorCmd */
typedef uint8_t tBTA_AV_CMD;

/* response codes for BTA_AvVendorRsp */
typedef uint8_t tBTA_AV_CODE;

/* error codes for BTA_AvProtectRsp */
typedef uint8_t tBTA_AV_ERR;

/* AV callback events */
#define BTA_AV_ENABLE_EVT 0      /* AV enabled */
#define BTA_AV_REGISTER_EVT 1    /* registered to AVDT */
#define BTA_AV_OPEN_EVT 2        /* connection opened */
#define BTA_AV_CLOSE_EVT 3       /* connection closed */
#define BTA_AV_START_EVT 4       /* stream data transfer started */
#define BTA_AV_STOP_EVT 5        /* stream data transfer stopped */
#define BTA_AV_PROTECT_REQ_EVT 6 /* content protection request */
#define BTA_AV_PROTECT_RSP_EVT 7 /* content protection response */
#define BTA_AV_RC_OPEN_EVT 8     /* remote control channel open */
#define BTA_AV_RC_CLOSE_EVT 9    /* remote control channel closed */
#define BTA_AV_REMOTE_CMD_EVT 10 /* remote control command */
#define BTA_AV_REMOTE_RSP_EVT 11 /* remote control response */
#define BTA_AV_VENDOR_CMD_EVT 12 /* vendor dependent remote control command */
#define BTA_AV_VENDOR_RSP_EVT                                              \
  13                           /* vendor dependent remote control response \
                                  */
#define BTA_AV_RECONFIG_EVT 14 /* reconfigure response */
#define BTA_AV_SUSPEND_EVT 15  /* suspend response */
#define BTA_AV_PENDING_EVT                                             \
  16                           /* incoming connection pending:         \
                                * signal channel is open and stream is \
                                * not open after                       \
                                * BTA_AV_SIGNALLING_TIMEOUT_MS */
#define BTA_AV_META_MSG_EVT 17 /* metadata messages */
#define BTA_AV_REJECT_EVT 18   /* incoming connection rejected */
#define BTA_AV_RC_FEAT_EVT \
  19 /* remote control channel peer supported features update */
#define BTA_AV_SINK_MEDIA_CFG_EVT 20    /* command to configure codec */
#define BTA_AV_SINK_MEDIA_DATA_EVT 21   /* sending data to Media Task */
#define BTA_AV_OFFLOAD_START_RSP_EVT 22 /* a2dp offload start response */
#define BTA_AV_RC_BROWSE_OPEN_EVT 23    /* remote control channel open */
#define BTA_AV_RC_BROWSE_CLOSE_EVT 24   /* remote control channel closed */
/* Max BTA event */
#define BTA_AV_MAX_EVT 25

typedef uint8_t tBTA_AV_EVT;

typedef enum {
  BTA_AV_CODEC_TYPE_UNKNOWN = 0x00,
  BTA_AV_CODEC_TYPE_SBC = 0x01,
  BTA_AV_CODEC_TYPE_AAC = 0x02,
  BTA_AV_CODEC_TYPE_APTX = 0x04,
  BTA_AV_CODEC_TYPE_APTXHD = 0x08,
  BTA_AV_CODEC_TYPE_LDAC = 0x10
} tBTA_AV_CODEC_TYPE;

/* Event associated with BTA_AV_ENABLE_EVT */
typedef struct { tBTA_AV_FEAT features; } tBTA_AV_ENABLE;

/* Event associated with BTA_AV_REGISTER_EVT */
typedef struct {
  tBTA_AV_CHNL chnl; /* audio/video */
  tBTA_AV_HNDL hndl; /* Handle associated with the stream. */
  uint8_t app_id;    /* ID associated with call to BTA_AvRegister() */
  tBTA_AV_STATUS status;
} tBTA_AV_REGISTER;

/* data associated with BTA_AV_OPEN_EVT */
#define BTA_AV_EDR_2MBPS 0x01
#define BTA_AV_EDR_3MBPS 0x02
typedef uint8_t tBTA_AV_EDR;

typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
  RawAddress bd_addr;
  tBTA_AV_STATUS status;
  bool starting;
  tBTA_AV_EDR edr; /* 0, if peer device does not support EDR */
  uint8_t sep;     /*  sep type of peer device */
} tBTA_AV_OPEN;

/* data associated with BTA_AV_CLOSE_EVT */
typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
} tBTA_AV_CLOSE;

/* data associated with BTA_AV_START_EVT */
typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
  tBTA_AV_STATUS status;
  bool initiator; /* true, if local device initiates the START */
  bool suspending;
} tBTA_AV_START;

/* data associated with BTA_AV_SUSPEND_EVT, BTA_AV_STOP_EVT */
typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
  bool initiator; /* true, if local device initiates the SUSPEND */
  tBTA_AV_STATUS status;
} tBTA_AV_SUSPEND;

/* data associated with BTA_AV_RECONFIG_EVT */
typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
  tBTA_AV_STATUS status;
} tBTA_AV_RECONFIG;

/* data associated with BTA_AV_PROTECT_REQ_EVT */
typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
  uint8_t* p_data;
  uint16_t len;
} tBTA_AV_PROTECT_REQ;

/* data associated with BTA_AV_PROTECT_RSP_EVT */
typedef struct {
  tBTA_AV_CHNL chnl;
  tBTA_AV_HNDL hndl;
  uint8_t* p_data;
  uint16_t len;
  tBTA_AV_ERR err_code;
} tBTA_AV_PROTECT_RSP;

/* data associated with BTA_AV_RC_OPEN_EVT */
typedef struct {
  uint8_t rc_handle;
  tBTA_AV_FEAT peer_features;
  RawAddress peer_addr;
  tBTA_AV_STATUS status;
} tBTA_AV_RC_OPEN;

/* data associated with BTA_AV_RC_CLOSE_EVT */
typedef struct {
  uint8_t rc_handle;
  RawAddress peer_addr;
} tBTA_AV_RC_CLOSE;

/* data associated with BTA_AV_RC_BROWSE_OPEN_EVT */
typedef struct {
  uint8_t rc_handle;
  RawAddress peer_addr;
  tBTA_AV_STATUS status;
} tBTA_AV_RC_BROWSE_OPEN;

/* data associated with BTA_AV_RC_BROWSE_CLOSE_EVT */
typedef struct {
  uint8_t rc_handle;
  RawAddress peer_addr;
} tBTA_AV_RC_BROWSE_CLOSE;

/* data associated with BTA_AV_RC_FEAT_EVT */
typedef struct {
  uint8_t rc_handle;
  tBTA_AV_FEAT peer_features;
  RawAddress peer_addr;
} tBTA_AV_RC_FEAT;

/* data associated with BTA_AV_REMOTE_CMD_EVT */
typedef struct {
  uint8_t rc_handle;
  tBTA_AV_RC rc_id;
  tBTA_AV_STATE key_state;
  uint8_t len;
  uint8_t* p_data;
  tAVRC_HDR hdr; /* Message header. */
  uint8_t label;
} tBTA_AV_REMOTE_CMD;

/* data associated with BTA_AV_REMOTE_RSP_EVT */
typedef struct {
  uint8_t rc_handle;
  tBTA_AV_RC rc_id;
  tBTA_AV_STATE key_state;
  uint8_t len;
  uint8_t* p_data;
  tBTA_AV_CODE rsp_code;
  uint8_t label;
} tBTA_AV_REMOTE_RSP;

/* data associated with BTA_AV_VENDOR_CMD_EVT, BTA_AV_VENDOR_RSP_EVT */
typedef struct {
  uint8_t rc_handle;
  uint16_t len; /* Max vendor dependent message is 512 */
  uint8_t label;
  tBTA_AV_CODE code;
  uint32_t company_id;
  uint8_t* p_data;
} tBTA_AV_VENDOR;

/* data associated with BTA_AV_META_MSG_EVT */
typedef struct {
  uint8_t rc_handle;
  uint16_t len;
  uint8_t label;
  tBTA_AV_CODE code;
  uint32_t company_id;
  uint8_t* p_data;
  tAVRC_MSG* p_msg;
} tBTA_AV_META_MSG;

/* data associated with BTA_AV_PENDING_EVT */
typedef struct { RawAddress bd_addr; } tBTA_AV_PEND;

/* data associated with BTA_AV_REJECT_EVT */
typedef struct {
  RawAddress bd_addr;
  tBTA_AV_HNDL hndl; /* Handle associated with the stream that rejected the
                        connection. */
} tBTA_AV_REJECT;

/* union of data associated with AV callback */
typedef union {
  tBTA_AV_CHNL chnl;
  tBTA_AV_ENABLE enable;
  tBTA_AV_REGISTER registr;
  tBTA_AV_OPEN open;
  tBTA_AV_CLOSE close;
  tBTA_AV_START start;
  tBTA_AV_PROTECT_REQ protect_req;
  tBTA_AV_PROTECT_RSP protect_rsp;
  tBTA_AV_RC_OPEN rc_open;
  tBTA_AV_RC_CLOSE rc_close;
  tBTA_AV_RC_BROWSE_OPEN rc_browse_open;
  tBTA_AV_RC_BROWSE_CLOSE rc_browse_close;
  tBTA_AV_REMOTE_CMD remote_cmd;
  tBTA_AV_REMOTE_RSP remote_rsp;
  tBTA_AV_VENDOR vendor_cmd;
  tBTA_AV_VENDOR vendor_rsp;
  tBTA_AV_RECONFIG reconfig;
  tBTA_AV_SUSPEND suspend;
  tBTA_AV_PEND pend;
  tBTA_AV_META_MSG meta_msg;
  tBTA_AV_REJECT reject;
  tBTA_AV_RC_FEAT rc_feat;
  tBTA_AV_STATUS status;
} tBTA_AV;

typedef struct {
  uint8_t* codec_info;
  RawAddress bd_addr;
} tBTA_AVK_CONFIG;

/* union of data associated with AV Media callback */
typedef union {
  BT_HDR* p_data;
  tBTA_AVK_CONFIG avk_config;
} tBTA_AV_MEDIA;

#define BTA_GROUP_NAVI_MSG_OP_DATA_LEN 5

/* AV callback */
typedef void(tBTA_AV_CBACK)(tBTA_AV_EVT event, tBTA_AV* p_data);
typedef void(tBTA_AV_SINK_DATA_CBACK)(tBTA_AV_EVT event, tBTA_AV_MEDIA* p_data);

/* type for stream state machine action functions */
struct tBTA_AV_SCB;
union tBTA_AV_DATA;
typedef void (*tBTA_AV_ACT)(tBTA_AV_SCB* p_cb, tBTA_AV_DATA* p_data);

/* AV configuration structure */
typedef struct {
  uint32_t company_id;  /* AVRCP Company ID */
  uint16_t avrc_mtu;    /* AVRCP MTU at L2CAP for control channel */
  uint16_t avrc_br_mtu; /* AVRCP MTU at L2CAP for browsing channel */
  uint16_t avrc_ct_cat; /* AVRCP controller categories */
  uint16_t avrc_tg_cat; /* AVRCP target categories */
  uint16_t sig_mtu;     /* AVDTP signaling channel MTU at L2CAP */
  uint16_t audio_mtu;   /* AVDTP audio transport channel MTU at L2CAP */
  const uint16_t*
      p_audio_flush_to;    /* AVDTP audio transport channel flush timeout */
  uint16_t audio_mqs;      /* AVDTP audio channel max data queue size */
  bool avrc_group;     /* true, to accept AVRC 1.3 group nevigation command */
  uint8_t num_co_ids;  /* company id count in p_meta_co_ids */
  uint8_t num_evt_ids; /* event id count in p_meta_evt_ids */
  tBTA_AV_CODE
      rc_pass_rsp; /* the default response code for pass through commands */
  const uint32_t*
      p_meta_co_ids; /* the metadata Get Capabilities response for company id */
  const uint8_t* p_meta_evt_ids; /* the the metadata Get Capabilities response
                                    for event id */
  const tBTA_AV_ACT* p_act_tbl;  /* action function table for audio stream */
  char avrc_controller_name[BTA_SERVICE_NAME_LEN]; /* Default AVRCP controller
                                                      name */
  char avrc_target_name[BTA_SERVICE_NAME_LEN]; /* Default AVRCP target name*/
} tBTA_AV_CFG;

/*****************************************************************************
 *  External Function Declarations
 ****************************************************************************/

/*******************************************************************************
 *
 * Function         BTA_AvEnable
 *
 * Description      Enable the advanced audio/video service. When the enable
 *                  operation is complete the callback function will be
 *                  called with a BTA_AV_ENABLE_EVT. This function must
 *                  be called before other function in the AV API are
 *                  called.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvEnable(tBTA_SEC sec_mask, tBTA_AV_FEAT features,
                  tBTA_AV_CBACK* p_cback);

/*******************************************************************************
 *
 * Function         BTA_AvDisable
 *
 * Description      Disable the advanced audio/video service.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvDisable(void);

/*******************************************************************************
 *
 * Function         BTA_AvRegister
 *
 * Description      Register the audio or video service to stack. When the
 *                  operation is complete the callback function will be
 *                  called with a BTA_AV_REGISTER_EVT. This function must
 *                  be called before AVDT stream is open.
 *
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvRegister(tBTA_AV_CHNL chnl, const char* p_service_name,
                    uint8_t app_id, tBTA_AV_SINK_DATA_CBACK* p_sink_data_cback,
                    uint16_t service_uuid);

/*******************************************************************************
 *
 * Function         BTA_AvDeregister
 *
 * Description      Deregister the audio or video service
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvDeregister(tBTA_AV_HNDL hndl);

/*******************************************************************************
 *
 * Function         BTA_AvOpen
 *
 * Description      Opens an advanced audio/video connection to a peer device.
 *                  When connection is open callback function is called
 *                  with a BTA_AV_OPEN_EVT.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvOpen(const RawAddress& bd_addr, tBTA_AV_HNDL handle, bool use_rc,
                tBTA_SEC sec_mask, uint16_t uuid);

/*******************************************************************************
 *
 * Function         BTA_AvClose
 *
 * Description      Close the current streams.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvClose(tBTA_AV_HNDL handle);

/*******************************************************************************
 *
 * Function         BTA_AvDisconnect
 *
 * Description      Close the connection to the address.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvDisconnect(const RawAddress& bd_addr);

/*******************************************************************************
 *
 * Function         BTA_AvStart
 *
 * Description      Start audio/video stream data transfer.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvStart(tBTA_AV_HNDL handle);

/*******************************************************************************
 *
 * Function         BTA_AvStop
 *
 * Description      Stop audio/video stream data transfer.
 *                  If suspend is true, this function sends AVDT suspend signal
 *                  to the connected peer(s).
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvStop(tBTA_AV_HNDL handle, bool suspend);

/*******************************************************************************
 *
 * Function         BTA_AvReconfig
 *
 * Description      Reconfigure the audio/video stream.
 *                  If suspend is true, this function tries the
 *                  suspend/reconfigure procedure first.
 *                  If suspend is false or when suspend/reconfigure fails,
 *                  this function closes and re-opens the AVDT connection.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvReconfig(tBTA_AV_HNDL hndl, bool suspend, uint8_t sep_info_idx,
                    uint8_t* p_codec_info, uint8_t num_protect,
                    const uint8_t* p_protect_info);

/*******************************************************************************
 *
 * Function         BTA_AvProtectReq
 *
 * Description      Send a content protection request.  This function can only
 *                  be used if AV is enabled with feature BTA_AV_FEAT_PROTECT.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvProtectReq(tBTA_AV_HNDL hndl, uint8_t* p_data, uint16_t len);

/*******************************************************************************
 *
 * Function         BTA_AvProtectRsp
 *
 * Description      Send a content protection response.  This function must
 *                  be called if a BTA_AV_PROTECT_REQ_EVT is received.
 *                  This function can only be used if AV is enabled with
 *                  feature BTA_AV_FEAT_PROTECT.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvProtectRsp(tBTA_AV_HNDL hndl, uint8_t error_code, uint8_t* p_data,
                      uint16_t len);

/*******************************************************************************
 *
 * Function         BTA_AvRemoteCmd
 *
 * Description      Send a remote control command.  This function can only
 *                  be used if AV is enabled with feature BTA_AV_FEAT_RCCT.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvRemoteCmd(uint8_t rc_handle, uint8_t label, tBTA_AV_RC rc_id,
                     tBTA_AV_STATE key_state);

/*******************************************************************************
 *
 * Function         BTA_AvRemoteVendorUniqueCmd
 *
 * Description      Send a remote control command with Vendor Unique rc_id.
 *                  This function can only be used if AV is enabled with
 *                  feature BTA_AV_FEAT_RCCT.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvRemoteVendorUniqueCmd(uint8_t rc_handle, uint8_t label,
                                 tBTA_AV_STATE key_state, uint8_t* p_msg,
                                 uint8_t buf_len);

/*******************************************************************************
 *
 * Function         BTA_AvVendorCmd
 *
 * Description      Send a vendor dependent remote control command.  This
 *                  function can only be used if AV is enabled with feature
 *                  BTA_AV_FEAT_VENDOR.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvVendorCmd(uint8_t rc_handle, uint8_t label, tBTA_AV_CODE cmd_code,
                     uint8_t* p_data, uint16_t len);

/*******************************************************************************
 *
 * Function         BTA_AvVendorRsp
 *
 * Description      Send a vendor dependent remote control response.
 *                  This function must be called if a BTA_AV_VENDOR_CMD_EVT
 *                  is received. This function can only be used if AV is
 *                  enabled with feature BTA_AV_FEAT_VENDOR.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvVendorRsp(uint8_t rc_handle, uint8_t label, tBTA_AV_CODE rsp_code,
                     uint8_t* p_data, uint16_t len, uint32_t company_id);

/*******************************************************************************
 *
 * Function         BTA_AvOpenRc
 *
 * Description      Open an AVRCP connection toward the device with the
 *                  specified handle
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvOpenRc(tBTA_AV_HNDL handle);

/*******************************************************************************
 *
 * Function         BTA_AvCloseRc
 *
 * Description      Close an AVRCP connection
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvCloseRc(uint8_t rc_handle);

/*******************************************************************************
 *
 * Function         BTA_AvMetaRsp
 *
 * Description      Send a Metadata command/response. The message contained
 *                  in p_pkt can be composed with AVRC utility functions.
 *                  This function can only be used if AV is enabled with feature
 *                  BTA_AV_FEAT_METADATA.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvMetaRsp(uint8_t rc_handle, uint8_t label, tBTA_AV_CODE rsp_code,
                   BT_HDR* p_pkt);

/*******************************************************************************
 *
 * Function         BTA_AvMetaCmd
 *
 * Description      Send a Metadata/Advanced Control command. The message
*contained
 *                  in p_pkt can be composed with AVRC utility functions.
 *                  This function can only be used if AV is enabled with feature
 *                  BTA_AV_FEAT_METADATA.
 *                  This message is sent only when the peer supports the TG
*role.
*8                  The only command makes sense right now is the absolute
*volume command.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvMetaCmd(uint8_t rc_handle, uint8_t label, tBTA_AV_CMD cmd_code,
                   BT_HDR* p_pkt);

/*******************************************************************************
 *
 * Function         BTA_AvOffloadStart
 *
 * Description      Request Starting of A2DP Offload.
 *                  This function is used to start A2DP offload if vendor lib
 *                  has the feature enabled.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvOffloadStart(tBTA_AV_HNDL hndl);

/*******************************************************************************
 *
 * Function         BTA_AvOffloadStartRsp
 *
 * Description      Response from vendor library indicating response for
 *                  OffloadStart.
 *
 * Returns          void
 *
 ******************************************************************************/
void BTA_AvOffloadStartRsp(tBTA_AV_HNDL hndl, tBTA_AV_STATUS status);

/**
 * Obtain the Channel Index for a peer.
 * If the peer already has associated internal state, the corresponding
 * Channel Index for that state is returned. Otherwise, the Channel Index
 * for unused internal state is returned instead.
 *
 * @param peer_address the peer address
 * @return the peer Channel Index index if obtained, otherwise -1
 */
int BTA_AvObtainPeerChannelIndex(const RawAddress& peer_address);

/**
 * Dump debug-related information for the BTA AV module.
 *
 * @param fd the file descriptor to use for writing the ASCII formatted
 * information
 */
void bta_debug_av_dump(int fd);

#endif /* BTA_AV_API_H */