BT AVRCP APIs

Overview

Bluetooth AVRCP reference APIs.

API Reference

Functions

esp_err_t esp_avrc_ct_register_callback(esp_avrc_ct_cb_t callback)

Register application callbacks to AVRCP module. This function should be called after esp_bluedroid_enable() completes successfully.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

Parameters

  • [in] callback: AVRCP controller callback function

esp_err_t esp_avrc_ct_init(void)

Initialize the bluetooth AVRCP controller module, This function should be called after esp_bluedroid_enable() completes successfully. Note: AVRC cannot work independently, AVRC should be used along with A2DP and AVRC should be initialized before A2DP.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

esp_err_t esp_avrc_ct_deinit(void)

De-initialize AVRCP controller module. This function should be called after after esp_bluedroid_enable() completes successfully. Note: AVRC cannot work independently, AVRC should be used along with A2DP and AVRC should be deinitialized before A2DP.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

esp_err_t esp_avrc_ct_send_set_player_value_cmd(uint8_t tl, uint8_t attr_id, uint8_t value_id)

Send player application settings command to AVRCP target. This function should be called after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

Parameters

  • [in] tl: : transaction label, 0 to 15, consecutive commands should use different values

  • [in] attr_id: : player application setting attribute IDs from one of esp_avrc_ps_attr_ids_t

  • [in] value_id: : attribute value defined for the specific player application setting attribute

esp_err_t esp_avrc_ct_send_get_rn_capabilities_cmd(uint8_t tl)

Send GetCapabilities PDU to AVRCP target to retrieve remote device’s supported notification event_ids. This function should be called after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

Parameters

  • [in] tl: : transaction label, 0 to 15, consecutive commands should use different values

esp_err_t esp_avrc_ct_send_register_notification_cmd(uint8_t tl, uint8_t event_id, uint32_t event_parameter)

Send register notification command to AVRCP target. This function should be called after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_ERR_NOT_SUPPORTED: if the event_id is not supported in current implementation

  • ESP_FAIL: others

Parameters

  • [in] tl: : transaction label, 0 to 15, consecutive commands should use different values.

  • [in] event_id: : id of events, e.g. ESP_AVRC_RN_PLAY_STATUS_CHANGE, ESP_AVRC_RN_TRACK_CHANGE, etc.

  • [in] event_parameter: : playback interval for ESP_AVRC_RN_PLAY_POS_CHANGED; For other events , value of this parameter is ignored.

esp_err_t esp_avrc_ct_send_set_absolute_volume_cmd(uint8_t tl, uint8_t volume)

Send set absolute volume command to AVRCP target. This function should be called after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_ERR_NOT_SUPPORTED: if the event_id is not supported in current implementation

  • ESP_FAIL: others

Parameters

  • [in] tl: : transaction label, 0 to 15, consecutive commands should use different values

  • [in] volume: : volume, 0 to 0x7f, means 0% to 100%

esp_err_t esp_avrc_ct_send_metadata_cmd(uint8_t tl, uint8_t attr_mask)

Send metadata command to AVRCP target. This function should be called after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

Parameters

  • [in] tl: : transaction label, 0 to 15, consecutive commands should use different values.

  • [in] attr_mask: : mask of attributes, e.g. ESP_AVRC_MD_ATTR_ID_TITLE | ESP_AVRC_MD_ATTR_ID_ARTIST.

esp_err_t esp_avrc_ct_send_passthrough_cmd(uint8_t tl, uint8_t key_code, uint8_t key_state)

Send passthrough command to AVRCP target. This function should be called after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

Parameters

  • [in] tl: : transaction label, 0 to 15, consecutive commands should use different values.

  • [in] key_code: : passthrough command code, e.g. ESP_AVRC_PT_CMD_PLAY, ESP_AVRC_PT_CMD_STOP, etc.

  • [in] key_state: : passthrough command key state, ESP_AVRC_PT_CMD_STATE_PRESSED or ESP_AVRC_PT_CMD_STATE_RELEASED

esp_err_t esp_avrc_tg_register_callback(esp_avrc_tg_cb_t callback)

Register application callbacks to AVRCP target module. This function should be called after esp_bluedroid_enable() completes successfully.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

Parameters

  • [in] callback: AVRCP target callback function

esp_err_t esp_avrc_tg_init(void)

Initialize the bluetooth AVRCP target module, This function should be called after esp_bluedroid_enable() completes successfully. Note: AVRC cannot work independently, AVRC should be used along with A2DP and AVRC should be initialized before A2DP.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

esp_err_t esp_avrc_tg_deinit(void)

De-initialize AVRCP target module. This function should be called after after esp_bluedroid_enable() completes successfully. Note: AVRC cannot work independently, AVRC should be used along with A2DP and AVRC should be deinitialized before A2DP.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not yet enabled

  • ESP_FAIL: others

esp_err_t esp_avrc_tg_get_psth_cmd_filter(esp_avrc_psth_filter_t filter, esp_avrc_psth_bit_mask_t *cmd_set)

Get the current filter of remote passthrough commands on AVRC target. Filter is given by filter type and bit mask for the passthrough commands. This function should be called after esp_avrc_tg_init(). For filter type ESP_AVRC_PSTH_FILTER_ALLOWED_CMD, the retrieved command set is constant and it covers all of the passthrough commands that can possibly be supported. For filter type ESP_AVRC_PSTH_FILTER_SUPPORT_COMMANDS, the retrieved command set covers the passthrough commands selected to be supported according to current configuration. The configuration can be changed using esp_avrc_tg_set_psth_cmd_filter().

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not enabled or AVRC TG is not initialized

  • ESP_ERR_INVALID_ARG: if filter type is invalid or cmd_set is NULL

  • ESP_FAIL: otherwise

esp_err_t esp_avrc_tg_set_psth_cmd_filter(esp_avrc_psth_filter_t filter, const esp_avrc_psth_bit_mask_t *cmd_set)

Set the filter of remote passthrough commands on AVRC target. Filter is given by filter type and bit mask for the passthrough commands. This function should be called after esp_avrc_tg_init().

If filter type is ESP_AVRC_PSTH_FILTER_SUPPORT_CMD, the passthrough commands which are set “1” as given in cmd_set will generate ESP_AVRC_CT_PASSTHROUGH_RSP_EVT callback event and are auto-accepted in the protocol stack, other commands are replied with response type “NOT IMPLEMENTED” (8). The set of supported commands should be a subset of allowed command set. The allowed command set can be retrieved using esp_avrc_tg_get_psth_cmd_filter() with filter type “ESP_AVRC_PSTH_FILTER_ALLOWED_CMD”.

Filter type “ESP_AVRC_PSTH_FILTER_ALLOWED_CMD” does not apply to this function.

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not enabled

  • ESP_ERR_INVALID_ARG: if filter type is invalid or cmd_set is NULL

  • ESP_ERR_NOT_SUPPORTED:: if filter type is ESP_AVRC_PSTH_FILTER_ALLOWED_CMD, or cmd_set includes unallowed commands

bool esp_avrc_psth_bit_mask_operation(esp_avrc_bit_mask_op_t op, esp_avrc_psth_bit_mask_t *psth, esp_avrc_pt_cmd_t cmd)

Operate on the type esp_avrc_psth_bit_mask_t with regard to a specific PASSTHROUGH command.

Return

For operation ESP_AVRC_BIT_MASK_OP_SET or ESP_AVRC_BIT_MASK_OP_CLEAR, return true for a successful operation, otherwise return false. For operation ESP_AVRC_BIT_MASK_OP_TEST, return true if the corresponding bit is set, otherwise false.

Parameters

  • [in] op: operation requested on the bit mask field

  • [in] psth: pointer to passthrough command bit mask structure

  • [in] cmd: passthrough command code

esp_err_t esp_avrc_tg_get_rn_evt_cap(esp_avrc_rn_evt_cap_t cap, esp_avrc_rn_evt_cap_mask_t *evt_set)

Get the requested event notification capabilies on local AVRC target. The capability is returned in a bit mask representation in evt_set. This function should be called after esp_avrc_tg_init().

For capability type “ESP_AVRC_RN_CAP_ALLOWED_EVT, the retrieved event set is constant and it covers all of the notifcation events that can possibly be supported with current implementation.

For capability type ESP_AVRC_RN_CAP_SUPPORTED_EVT, the event set covers the notification events selected to be supported under current configuration, The configuration can be changed using esp_avrc_tg_set_rn_evt_cap().

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not enabled or AVRC TG is not initialized

  • ESP_ERR_INVALID_ARG: if cap is invalid or evt_set is NULL

  • ESP_FAIL: otherwise

esp_err_t esp_avrc_tg_set_rn_evt_cap(const esp_avrc_rn_evt_cap_mask_t *evt_set)

Set the event notification capabilities on local AVRCP target. The capability is given in a bit mask representation in evt_set and must be a subset of allowed event IDs with current implementation. This function should be called after esp_avrc_tg_init().

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not enabled

  • ESP_ERR_INVALID_ARG: if evt_set is NULL

bool esp_avrc_rn_evt_bit_mask_operation(esp_avrc_bit_mask_op_t op, esp_avrc_rn_evt_cap_mask_t *events, esp_avrc_rn_event_ids_t event_id)

Operate on the type esp_avrc_rn_evt_cap_mask_t with regard to a specific event.

For operation ESP_AVRC_BIT_MASK_OP_TEST, return true if the corresponding bit is set, otherwise false.

Return

For operation ESP_AVRC_BIT_MASK_OP_SET or ESP_AVRC_BIT_MASK_OP_CLEAR, return true for a successful operation, otherwise return false.

Parameters

  • [in] op: operation requested on the bit mask field

  • [in] events: pointer to event notification capability bit mask structure

  • [in] event_id: notification event code

esp_err_t esp_avrc_tg_send_rn_rsp(esp_avrc_rn_event_ids_t event_id, esp_avrc_rn_rsp_t rsp, esp_avrc_rn_param_t *param)

Send RegisterNotification Response to remote AVRCP controller. Local event notification capability can be set using esp_avrc_tg_set_rn_evt_cap(), in a bit mask representation in evt_set. This function should be called after esp_avrc_tg_init().

Return

  • ESP_OK: success

  • ESP_ERR_INVALID_STATE: if bluetooth stack is not enabled or AVRC TG is not initialized

  • ESP_ERR_INVALID_ARG: if evt_set is NULL

Parameters

  • [in] event_id: notification event ID that remote AVRCP CT registers

  • [in] rsp: notification response code

  • [in] param: parameters included in the specific notification

Unions

union esp_avrc_rn_param_t
#include <esp_avrc_api.h>

AVRCP notification parameters.

Public Members

uint8_t volume

response data for ESP_AVRC_RN_VOLUME_CHANGE, ranges 0..127

esp_avrc_playback_stat_t playback

response data for ESP_AVRC_RN_PLAY_STATUS_CHANGE

uint8_t elm_id[8]

response data for ESP_AVRC_RN_TRACK_CHANGE

uint32_t play_pos

response data for ESP_AVRC_RN_PLAY_POS_CHANGED, in millisecond

esp_avrc_batt_stat_t batt

response data for ESP_AVRC_RN_BATTERY_STATUS_CHANGE

union esp_avrc_ct_cb_param_t
#include <esp_avrc_api.h>

AVRC controller callback parameters.

Public Members

struct esp_avrc_ct_cb_param_t::avrc_ct_conn_stat_param conn_stat

AVRC connection status

struct esp_avrc_ct_cb_param_t::avrc_ct_psth_rsp_param psth_rsp

passthrough command response

struct esp_avrc_ct_cb_param_t::avrc_ct_meta_rsp_param meta_rsp

metadata attributes response

struct esp_avrc_ct_cb_param_t::avrc_ct_change_notify_param change_ntf

notifications

struct esp_avrc_ct_cb_param_t::avrc_ct_rmt_feats_param rmt_feats

AVRC features discovered from remote SDP server

struct esp_avrc_ct_cb_param_t::avrc_ct_get_rn_caps_rsp_param get_rn_caps_rsp

get supported event capabilities response from AVRCP target

struct esp_avrc_ct_cb_param_t::avrc_ct_set_volume_rsp_param set_volume_rsp

set absolute volume response event

struct avrc_ct_change_notify_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_CHANGE_NOTIFY_EVT.

Public Members

uint8_t event_id

id of AVRC event notification

esp_avrc_rn_param_t event_parameter

event notification parameter

struct avrc_ct_conn_stat_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_CONNECTION_STATE_EVT.

Public Members

bool connected

whether AVRC connection is set up

esp_bd_addr_t remote_bda

remote bluetooth device address

struct avrc_ct_get_rn_caps_rsp_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_GET_RN_CAPABILITIES_RSP_EVT.

Public Members

uint8_t cap_count

number of items provided in event or company_id according to cap_id used

esp_avrc_rn_evt_cap_mask_t evt_set

supported event_ids represented in bit-mask

struct avrc_ct_meta_rsp_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_METADATA_RSP_EVT.

Public Members

uint8_t attr_id

id of metadata attribute

uint8_t *attr_text

attribute itself

int attr_length

attribute character length

struct avrc_ct_psth_rsp_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_PASSTHROUGH_RSP_EVT.

Public Members

uint8_t tl

transaction label, 0 to 15

uint8_t key_code

passthrough command code

uint8_t key_state

0 for PRESSED, 1 for RELEASED

struct avrc_ct_rmt_feats_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_REMOTE_FEATURES_EVT.

Public Members

uint32_t feat_mask

AVRC feature mask of remote device

uint16_t tg_feat_flag

feature flag of remote device as TG

esp_bd_addr_t remote_bda

remote bluetooth device address

struct avrc_ct_set_volume_rsp_param
#include <esp_avrc_api.h>

ESP_AVRC_CT_SET_ABSOLUTE_VOLUME_RSP_EVT.

Public Members

uint8_t volume

the volume which has actually been set, range is 0 to 0x7f, means 0% to 100%

union esp_avrc_tg_cb_param_t
#include <esp_avrc_api.h>

AVRC target callback parameters.

Public Members

struct esp_avrc_tg_cb_param_t::avrc_tg_conn_stat_param conn_stat

AVRC connection status

struct esp_avrc_tg_cb_param_t::avrc_tg_rmt_feats_param rmt_feats

AVRC features discovered through SDP

struct esp_avrc_tg_cb_param_t::avrc_tg_psth_cmd_param psth_cmd

passthrough command

struct esp_avrc_tg_cb_param_t::avrc_tg_set_abs_vol_param set_abs_vol

set absolute volume command targeted on audio sink

struct esp_avrc_tg_cb_param_t::avrc_tg_reg_ntf_param reg_ntf

register notification

struct esp_avrc_tg_cb_param_t::avrc_tg_set_app_value_param set_app_value

set player application value

struct avrc_tg_conn_stat_param
#include <esp_avrc_api.h>

ESP_AVRC_TG_CONNECTION_STATE_EVT.

Public Members

bool connected

whether AVRC connection is set up

esp_bd_addr_t remote_bda

remote bluetooth device address

struct avrc_tg_psth_cmd_param
#include <esp_avrc_api.h>

ESP_AVRC_TG_PASSTHROUGH_CMD_EVT.

Public Members

uint8_t key_code

passthrough command code

uint8_t key_state

0 for PRESSED, 1 for RELEASED

struct avrc_tg_reg_ntf_param
#include <esp_avrc_api.h>

ESP_AVRC_TG_REGISTER_NOTIFICATION_EVT.

Public Members

uint8_t event_id

event id of AVRC RegisterNotification

uint32_t event_parameter

event notification parameter

struct avrc_tg_rmt_feats_param
#include <esp_avrc_api.h>

ESP_AVRC_TG_REMOTE_FEATURES_EVT.

Public Members

uint32_t feat_mask

AVRC feature mask of remote device

uint16_t ct_feat_flag

feature flag of remote device as CT

esp_bd_addr_t remote_bda

remote bluetooth device address

struct avrc_tg_set_abs_vol_param
#include <esp_avrc_api.h>

ESP_AVRC_TG_SET_ABSOLUTE_VOLUME_CMD_EVT.

Public Members

uint8_t volume

volume ranges from 0 to 127

struct avrc_tg_set_app_value_param
#include <esp_avrc_api.h>

ESP_AVRC_TG_SET_PLAYER_APP_VALUE_EVT.

Public Members

uint8_t num_val

attribute num

esp_avrc_set_app_value_param_t *p_vals

point to the id and value of player application attribute

Structures

struct esp_avrc_psth_bit_mask_t

AVRC passthrough command bit mask.

Public Members

uint16_t bits[8]

bit mask representation of PASSTHROUGH commands

struct esp_avrc_rn_evt_cap_mask_t

AVRC target notification event capability bit mask.

Public Members

uint16_t bits

bit mask representation of PASSTHROUGH commands

struct esp_avrc_set_app_value_param_t

AVRCP set app value parameters.

Public Members

uint8_t attr_id

player application attribute id

uint8_t attr_val

player application attribute value

Macros

ESP_AVRC_TRANS_LABEL_MAX

max transaction label

Type Definitions

typedef void (*esp_avrc_ct_cb_t)(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param)

AVRCP controller callback function type.

Parameters

  • event: : Event type

  • param: : Pointer to callback parameter union

typedef void (*esp_avrc_tg_cb_t)(esp_avrc_tg_cb_event_t event, esp_avrc_tg_cb_param_t *param)

AVRCP target callback function type.

Parameters

  • event: : Event type

  • param: : Pointer to callback parameter union

Enumerations

enum esp_avrc_features_t

AVRC feature bit mask.

Values:

ESP_AVRC_FEAT_RCTG = 0x0001

remote control target

ESP_AVRC_FEAT_RCCT = 0x0002

remote control controller

ESP_AVRC_FEAT_VENDOR = 0x0008

remote control vendor dependent commands

ESP_AVRC_FEAT_BROWSE = 0x0010

use browsing channel

ESP_AVRC_FEAT_META_DATA = 0x0040

remote control metadata transfer command/response

ESP_AVRC_FEAT_ADV_CTRL = 0x0200

remote control advanced control commmand/response

enum esp_avrc_feature_flag_t

AVRC supported features flag retrieved in SDP record.

Values:

ESP_AVRC_FEAT_FLAG_CAT1 = 0x0001

category 1

ESP_AVRC_FEAT_FLAG_CAT2 = 0x0002

category 2

ESP_AVRC_FEAT_FLAG_CAT3 = 0x0004

category 3

ESP_AVRC_FEAT_FLAG_CAT4 = 0x0008

category 4

ESP_AVRC_FEAT_FLAG_BROWSING = 0x0040

browsing

ESP_AVRC_FEAT_FLAG_COVER_ART_GET_IMAGE_PROP = 0x0080

Cover Art GetImageProperties

ESP_AVRC_FEAT_FLAG_COVER_ART_GET_IMAGE = 0x0100

Cover Art GetImage

ESP_AVRC_FEAT_FLAG_COVER_ART_GET_LINKED_THUMBNAIL = 0x0200

Cover Art GetLinkedThumbnail

enum esp_avrc_pt_cmd_t

AVRC passthrough command code.

Values:

ESP_AVRC_PT_CMD_SELECT = 0x00

select

ESP_AVRC_PT_CMD_UP = 0x01

up

ESP_AVRC_PT_CMD_DOWN = 0x02

down

ESP_AVRC_PT_CMD_LEFT = 0x03

left

ESP_AVRC_PT_CMD_RIGHT = 0x04

right

ESP_AVRC_PT_CMD_RIGHT_UP = 0x05

right-up

ESP_AVRC_PT_CMD_RIGHT_DOWN = 0x06

right-down

ESP_AVRC_PT_CMD_LEFT_UP = 0x07

left-up

ESP_AVRC_PT_CMD_LEFT_DOWN = 0x08

left-down

ESP_AVRC_PT_CMD_ROOT_MENU = 0x09

root menu

ESP_AVRC_PT_CMD_SETUP_MENU = 0x0A

setup menu

ESP_AVRC_PT_CMD_CONT_MENU = 0x0B

contents menu

ESP_AVRC_PT_CMD_FAV_MENU = 0x0C

favorite menu

ESP_AVRC_PT_CMD_EXIT = 0x0D

exit

ESP_AVRC_PT_CMD_0 = 0x20

0

ESP_AVRC_PT_CMD_1 = 0x21

1

ESP_AVRC_PT_CMD_2 = 0x22

2

ESP_AVRC_PT_CMD_3 = 0x23

3

ESP_AVRC_PT_CMD_4 = 0x24

4

ESP_AVRC_PT_CMD_5 = 0x25

5

ESP_AVRC_PT_CMD_6 = 0x26

6

ESP_AVRC_PT_CMD_7 = 0x27

7

ESP_AVRC_PT_CMD_8 = 0x28

8

ESP_AVRC_PT_CMD_9 = 0x29

9

ESP_AVRC_PT_CMD_DOT = 0x2A

dot

ESP_AVRC_PT_CMD_ENTER = 0x2B

enter

ESP_AVRC_PT_CMD_CLEAR = 0x2C

clear

ESP_AVRC_PT_CMD_CHAN_UP = 0x30

channel up

ESP_AVRC_PT_CMD_CHAN_DOWN = 0x31

channel down

ESP_AVRC_PT_CMD_PREV_CHAN = 0x32

previous channel

ESP_AVRC_PT_CMD_SOUND_SEL = 0x33

sound select

ESP_AVRC_PT_CMD_INPUT_SEL = 0x34

input select

ESP_AVRC_PT_CMD_DISP_INFO = 0x35

display information

ESP_AVRC_PT_CMD_HELP = 0x36

help

ESP_AVRC_PT_CMD_PAGE_UP = 0x37

page up

ESP_AVRC_PT_CMD_PAGE_DOWN = 0x38

page down

ESP_AVRC_PT_CMD_POWER = 0x40

power

ESP_AVRC_PT_CMD_VOL_UP = 0x41

volume up

ESP_AVRC_PT_CMD_VOL_DOWN = 0x42

volume down

ESP_AVRC_PT_CMD_MUTE = 0x43

mute

ESP_AVRC_PT_CMD_PLAY = 0x44

play

ESP_AVRC_PT_CMD_STOP = 0x45

stop

ESP_AVRC_PT_CMD_PAUSE = 0x46

pause

ESP_AVRC_PT_CMD_RECORD = 0x47

record

ESP_AVRC_PT_CMD_REWIND = 0x48

rewind

ESP_AVRC_PT_CMD_FAST_FORWARD = 0x49

fast forward

ESP_AVRC_PT_CMD_EJECT = 0x4A

eject

ESP_AVRC_PT_CMD_FORWARD = 0x4B

forward

ESP_AVRC_PT_CMD_BACKWARD = 0x4C

backward

ESP_AVRC_PT_CMD_ANGLE = 0x50

angle

ESP_AVRC_PT_CMD_SUBPICT = 0x51

subpicture

ESP_AVRC_PT_CMD_F1 = 0x71

F1

ESP_AVRC_PT_CMD_F2 = 0x72

F2

ESP_AVRC_PT_CMD_F3 = 0x73

F3

ESP_AVRC_PT_CMD_F4 = 0x74

F4

ESP_AVRC_PT_CMD_F5 = 0x75

F5

ESP_AVRC_PT_CMD_VENDOR = 0x7E

vendor unique

enum esp_avrc_psth_filter_t

AVRC passthrough command filter.

Values:

ESP_AVRC_PSTH_FILTER_ALLOWED_CMD = 0

all of the PASSTHROUGH commands that can possibly be used, immuateble

ESP_AVRC_PSTH_FILTER_SUPPORTED_CMD = 1

PASSTHROUGH commands selectively supported according to the current configuration

ESP_AVRC_PSTH_FILTER_SUPPORT_MAX
enum esp_avrc_bit_mask_op_t

Values:

ESP_AVRC_BIT_MASK_OP_TEST = 0

operation code to test a specific bit

ESP_AVRC_BIT_MASK_OP_SET = 1

operation code to set a specific bit

ESP_AVRC_BIT_MASK_OP_CLEAR = 2

operation code to clear a specific bit

enum esp_avrc_pt_cmd_state_t

AVRC passthrough command state.

Values:

ESP_AVRC_PT_CMD_STATE_PRESSED = 0

key pressed

ESP_AVRC_PT_CMD_STATE_RELEASED = 1

key released

enum esp_avrc_ct_cb_event_t

AVRC Controller callback events.

Values:

ESP_AVRC_CT_CONNECTION_STATE_EVT = 0

connection state changed event

ESP_AVRC_CT_PASSTHROUGH_RSP_EVT = 1

passthrough response event

ESP_AVRC_CT_METADATA_RSP_EVT = 2

metadata response event

ESP_AVRC_CT_PLAY_STATUS_RSP_EVT = 3

play status response event

ESP_AVRC_CT_CHANGE_NOTIFY_EVT = 4

notification event

ESP_AVRC_CT_REMOTE_FEATURES_EVT = 5

feature of remote device indication event

ESP_AVRC_CT_GET_RN_CAPABILITIES_RSP_EVT = 6

supported notification events capability of peer device

ESP_AVRC_CT_SET_ABSOLUTE_VOLUME_RSP_EVT = 7

set absolute volume response event

enum esp_avrc_tg_cb_event_t

AVRC Target callback events.

Values:

ESP_AVRC_TG_CONNECTION_STATE_EVT = 0

connection state changed event

ESP_AVRC_TG_REMOTE_FEATURES_EVT = 1

feature of remote device indication event

ESP_AVRC_TG_PASSTHROUGH_CMD_EVT = 2

passthrough command event

ESP_AVRC_TG_SET_ABSOLUTE_VOLUME_CMD_EVT = 3

set absolute volume command from remote device

ESP_AVRC_TG_REGISTER_NOTIFICATION_EVT = 4

register notification event

ESP_AVRC_TG_SET_PLAYER_APP_VALUE_EVT = 5

set applicaton attribute value, attribute refer to esp_avrc_ps_attr_ids_t

enum esp_avrc_md_attr_mask_t

AVRC metadata attribute mask.

Values:

ESP_AVRC_MD_ATTR_TITLE = 0x1

title of the playing track

ESP_AVRC_MD_ATTR_ARTIST = 0x2

track artist

ESP_AVRC_MD_ATTR_ALBUM = 0x4

album name

ESP_AVRC_MD_ATTR_TRACK_NUM = 0x8

track position on the album

ESP_AVRC_MD_ATTR_NUM_TRACKS = 0x10

number of tracks on the album

ESP_AVRC_MD_ATTR_GENRE = 0x20

track genre

ESP_AVRC_MD_ATTR_PLAYING_TIME = 0x40

total album playing time in miliseconds

enum esp_avrc_rn_event_ids_t

AVRC event notification ids.

Values:

ESP_AVRC_RN_PLAY_STATUS_CHANGE = 0x01

track status change, eg. from playing to paused

ESP_AVRC_RN_TRACK_CHANGE = 0x02

new track is loaded

ESP_AVRC_RN_TRACK_REACHED_END = 0x03

current track reached end

ESP_AVRC_RN_TRACK_REACHED_START = 0x04

current track reached start position

ESP_AVRC_RN_PLAY_POS_CHANGED = 0x05

track playing position changed

ESP_AVRC_RN_BATTERY_STATUS_CHANGE = 0x06

battery status changed

ESP_AVRC_RN_SYSTEM_STATUS_CHANGE = 0x07

system status changed

ESP_AVRC_RN_APP_SETTING_CHANGE = 0x08

application settings changed

ESP_AVRC_RN_NOW_PLAYING_CHANGE = 0x09

now playing content changed

ESP_AVRC_RN_AVAILABLE_PLAYERS_CHANGE = 0x0a

available players changed

ESP_AVRC_RN_ADDRESSED_PLAYER_CHANGE = 0x0b

the addressed player changed

ESP_AVRC_RN_UIDS_CHANGE = 0x0c

UIDs changed

ESP_AVRC_RN_VOLUME_CHANGE = 0x0d

volume changed locally on TG

ESP_AVRC_RN_MAX_EVT
enum esp_avrc_rn_evt_cap_t

AVRC target notification event notification capability.

Values:

ESP_AVRC_RN_CAP_ALLOWED_EVT = 0

all of the notification events that can possibly be supported, immutable

ESP_AVRC_RN_CAP_SUPPORTED_EVT = 1

notification events selectively supported according to the current configuration

ESP_AVRC_RN_CAP_MAX
enum esp_avrc_rn_rsp_t

AVRC notification response type.

Values:

ESP_AVRC_RN_RSP_INTERIM = 13

initial response to RegisterNotification, should be sent T_mtp(1000ms) from receiving the command

ESP_AVRC_RN_RSP_CHANGED = 15

final response to RegisterNotification command

enum esp_avrc_ps_attr_ids_t

AVRC player setting ids.

Values:

ESP_AVRC_PS_EQUALIZER = 0x01

equalizer, on or off

ESP_AVRC_PS_REPEAT_MODE = 0x02

repeat mode

ESP_AVRC_PS_SHUFFLE_MODE = 0x03

shuffle mode

ESP_AVRC_PS_SCAN_MODE = 0x04

scan mode on or off

ESP_AVRC_PS_MAX_ATTR
enum esp_avrc_ps_eq_value_ids_t

AVRC equalizer modes.

Values:

ESP_AVRC_PS_EQUALIZER_OFF = 0x1

equalizer OFF

ESP_AVRC_PS_EQUALIZER_ON = 0x2

equalizer ON

enum esp_avrc_ps_rpt_value_ids_t

AVRC repeat modes.

Values:

ESP_AVRC_PS_REPEAT_OFF = 0x1

repeat mode off

ESP_AVRC_PS_REPEAT_SINGLE = 0x2

single track repeat

ESP_AVRC_PS_REPEAT_GROUP = 0x3

group repeat

enum esp_avrc_ps_shf_value_ids_t

AVRC shuffle modes.

Values:

ESP_AVRC_PS_SHUFFLE_OFF = 0x1
ESP_AVRC_PS_SHUFFLE_ALL = 0x2
ESP_AVRC_PS_SHUFFLE_GROUP = 0x3
enum esp_avrc_ps_scn_value_ids_t

AVRC scan modes.

Values:

ESP_AVRC_PS_SCAN_OFF = 0x1

scan off

ESP_AVRC_PS_SCAN_ALL = 0x2

all tracks scan

ESP_AVRC_PS_SCAN_GROUP = 0x3

group scan

enum esp_avrc_rsp_t

AVCTP response codes.

Values:

ESP_AVRC_RSP_NOT_IMPL = 8

not implemented

ESP_AVRC_RSP_ACCEPT = 9

accept

ESP_AVRC_RSP_REJECT = 10

reject

ESP_AVRC_RSP_IN_TRANS = 11

in transition

ESP_AVRC_RSP_IMPL_STBL = 12

implemented/stable

ESP_AVRC_RSP_CHANGED = 13

changed

ESP_AVRC_RSP_INTERIM = 15

interim

enum esp_avrc_batt_stat_t

AVRCP battery status.

Values:

ESP_AVRC_BATT_NORMAL = 0

normal state

ESP_AVRC_BATT_WARNING = 1

unable to operate soon

ESP_AVRC_BATT_CRITICAL = 2

cannot operate any more

ESP_AVRC_BATT_EXTERNAL = 3

plugged to external power supply

ESP_AVRC_BATT_FULL_CHARGE = 4

when completely charged from external power supply

enum esp_avrc_playback_stat_t

AVRCP current status of playback.

Values:

ESP_AVRC_PLAYBACK_STOPPED = 0

stopped

ESP_AVRC_PLAYBACK_PLAYING = 1

playing

ESP_AVRC_PLAYBACK_PAUSED = 2

paused

ESP_AVRC_PLAYBACK_FWD_SEEK = 3

forward seek

ESP_AVRC_PLAYBACK_REV_SEEK = 4

reverse seek

ESP_AVRC_PLAYBACK_ERROR = 0xFF

error

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