/******************************************************************************
 *
 *  Copyright (C) 2006-2016 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.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  AVRCP definition and data types
 *
 ******************************************************************************/
#ifndef _AVRC_DEFS_H
#define _AVRC_DEFS_H

#include "stack/include/bt_types.h"

/*****************************************************************************
**  constants
*****************************************************************************/

/* Profile revision numbers */
#define AVRC_REV_1_0        0x0100
#define AVRC_REV_1_3        0x0103
#define AVRC_REV_1_4        0x0104
#define AVRC_REV_1_5        0x0105
#define AVRC_REV_1_6        0x0106

#define AVRC_PACKET_LEN             512 /* Per the spec, you must support 512 byte RC packets */

#define AVRC_MIN_CONTROL_MTU        48  /* Per the spec, minimum MTU for the control channel */
#define AVRC_MIN_BROWSE_MTU         335 /* Per the spec, minimum MTU for the browsing channel */

#define AVRC_META_PDU_OFFSET        4
#define AVRC_SUB_TYPE_LEN           4
#define AVRC_UID_SIZE               8
#define AVRC_FEATURE_MASK_SIZE      16

/* command type codes */
#define AVRC_CMD_CTRL       0   /* Instruct a target to perform an operation */
#define AVRC_CMD_STATUS     1   /* Check a device's current status */
#define AVRC_CMD_SPEC_INQ   2   /* Check whether a target supports a particular
                                   control command; all operands are included */
#define AVRC_CMD_NOTIF      3   /* Used for receiving notification of a change in a device's state */
#define AVRC_CMD_GEN_INQ    4   /* Check whether a target supports a particular
                                   control command; operands are not included */

/* response type codes */
#define AVRC_RSP_NOT_IMPL   8   /* The target does not implement the command specified
                                   by the opcode and operand,
                                   or doesn't implement the specified subunit */
#define AVRC_RSP_ACCEPT     9   /* The target executed or is executing the command */
#define AVRC_RSP_REJ        10  /* The target implements the command specified by the
                                   opcode but cannot respond because the current state
                                   of the target doesn't allow it */
#define AVRC_RSP_IN_TRANS   11  /* The target implements the status command but it is
                                   in a state of transition; the status command may
                                   be retried at a future time */
#define AVRC_RSP_IMPL_STBL  12  /* For specific inquiry or general inquiy commands,
                                   the target implements the command; for status
                                   commands, the target returns stable and includes
                                   the status results */
#define AVRC_RSP_CHANGED    13  /* The response frame contains a notification that the
                                   target device's state has changed */
#define AVRC_RSP_INTERIM    15  /* For control commands, the target has accepted the
                                   request but cannot return information within 100
                                   milliseconds; for notify commands, the target accepted
                                   the command, and will notify the controller of a change
                                   of target state at a future time */

/* subunit type */
#define AVRC_SUB_MONITOR    0x00    /* Monitor */
#define AVRC_SUB_AUDIO      0x01    /* Audio */
#define AVRC_SUB_PRINTER    0x02    /* Printer */
#define AVRC_SUB_DISC       0x03    /* Disc */
#define AVRC_SUB_TAPE       0x04    /* Tape recorder/player */
#define AVRC_SUB_TUNER      0x05    /* Tuner */
#define AVRC_SUB_CA         0x06    /* CA */
#define AVRC_SUB_CAMERA     0x07    /* Camera */
#define AVRC_SUB_PANEL      0x09    /* Panel */
#define AVRC_SUB_BB         0x0A    /* Bulletin Board */
#define AVRC_SUB_CAM_STOR   0x0B    /* Camera Storage */
#define AVRC_SUB_VENDOR     0x1C    /* Vendor unique */
#define AVRC_SUB_EXT        0x1E    /* Subunit type extended to next byte */
#define AVRC_SUB_UNIT       0x1F    /* Unit */

/* opcodes - defined by 1394ta */
#define AVRC_OP_UNIT_INFO   0x30    /* Report unit information */
#define AVRC_OP_SUB_INFO    0x31    /* Report subunit information */
#define AVRC_OP_VENDOR      0x00    /* Vendor-dependent commands */
#define AVRC_OP_PASS_THRU   0x7C    /* panel subunit opcode */
/* opcodes 80-9F and E0-FF are not used by 1394ta.Sneak one for the browsing channel */
#define AVRC_OP_BROWSE      0xFF    /* Browsing */
#define AVRC_OP_INVALID     0xFE    /* invalid one */

/* Company ID's
*/
#define AVRC_CO_BLUETOOTH_SIG   0x00FFFFFF
#define AVRC_CO_WIDCOMM         0x00000361
#define AVRC_CO_BROADCOM        0x00001018
#define AVRC_CO_GOOGLE          0x00DAA119
#define AVRC_CO_METADATA        0x00001958  /* Unique COMPANY ID for Metadata messages */

/* State flag for Passthrough commands
*/
#define AVRC_STATE_PRESS    0
#define AVRC_STATE_RELEASE  1

/* Operation ID list for Passthrough commands
*/
#define AVRC_ID_SELECT      0x00    /* select */
#define AVRC_ID_UP          0x01    /* up */
#define AVRC_ID_DOWN        0x02    /* down */
#define AVRC_ID_LEFT        0x03    /* left */
#define AVRC_ID_RIGHT       0x04    /* right */
#define AVRC_ID_RIGHT_UP    0x05    /* right-up */
#define AVRC_ID_RIGHT_DOWN  0x06    /* right-down */
#define AVRC_ID_LEFT_UP     0x07    /* left-up */
#define AVRC_ID_LEFT_DOWN   0x08    /* left-down */
#define AVRC_ID_ROOT_MENU   0x09    /* root menu */
#define AVRC_ID_SETUP_MENU  0x0A    /* setup menu */
#define AVRC_ID_CONT_MENU   0x0B    /* contents menu */
#define AVRC_ID_FAV_MENU    0x0C    /* favorite menu */
#define AVRC_ID_EXIT        0x0D    /* exit */
#define AVRC_ID_0           0x20    /* 0 */
#define AVRC_ID_1           0x21    /* 1 */
#define AVRC_ID_2           0x22    /* 2 */
#define AVRC_ID_3           0x23    /* 3 */
#define AVRC_ID_4           0x24    /* 4 */
#define AVRC_ID_5           0x25    /* 5 */
#define AVRC_ID_6           0x26    /* 6 */
#define AVRC_ID_7           0x27    /* 7 */
#define AVRC_ID_8           0x28    /* 8 */
#define AVRC_ID_9           0x29    /* 9 */
#define AVRC_ID_DOT         0x2A    /* dot */
#define AVRC_ID_ENTER       0x2B    /* enter */
#define AVRC_ID_CLEAR       0x2C    /* clear */
#define AVRC_ID_CHAN_UP     0x30    /* channel up */
#define AVRC_ID_CHAN_DOWN   0x31    /* channel down */
#define AVRC_ID_PREV_CHAN   0x32    /* previous channel */
#define AVRC_ID_SOUND_SEL   0x33    /* sound select */
#define AVRC_ID_INPUT_SEL   0x34    /* input select */
#define AVRC_ID_DISP_INFO   0x35    /* display information */
#define AVRC_ID_HELP        0x36    /* help */
#define AVRC_ID_PAGE_UP     0x37    /* page up */
#define AVRC_ID_PAGE_DOWN   0x38    /* page down */
#define AVRC_ID_POWER       0x40    /* power */
#define AVRC_ID_VOL_UP      0x41    /* volume up */
#define AVRC_ID_VOL_DOWN    0x42    /* volume down */
#define AVRC_ID_MUTE        0x43    /* mute */
#define AVRC_ID_PLAY        0x44    /* play */
#define AVRC_ID_STOP        0x45    /* stop */
#define AVRC_ID_PAUSE       0x46    /* pause */
#define AVRC_ID_RECORD      0x47    /* record */
#define AVRC_ID_REWIND      0x48    /* rewind */
#define AVRC_ID_FAST_FOR    0x49    /* fast forward */
#define AVRC_ID_EJECT       0x4A    /* eject */
#define AVRC_ID_FORWARD     0x4B    /* forward */
#define AVRC_ID_BACKWARD    0x4C    /* backward */
#define AVRC_ID_ANGLE       0x50    /* angle */
#define AVRC_ID_SUBPICT     0x51    /* subpicture */
#define AVRC_ID_F1          0x71    /* F1 */
#define AVRC_ID_F2          0x72    /* F2 */
#define AVRC_ID_F3          0x73    /* F3 */
#define AVRC_ID_F4          0x74    /* F4 */
#define AVRC_ID_F5          0x75    /* F5 */
#define AVRC_ID_VENDOR      0x7E    /* vendor unique */
#define AVRC_KEYPRESSED_RELEASE 0x80

/*****************************************************************************
**  Metadata transfer definitions
*****************************************************************************/

/* Define the Metadata Packet types
*/
#define AVRC_PKT_SINGLE           0
#define AVRC_PKT_START            1
#define AVRC_PKT_CONTINUE         2
#define AVRC_PKT_END              3
#define AVRC_PKT_TYPE_MASK        3

/* Define the PDUs carried in the vendor dependant data
*/
#define AVRC_PDU_GET_CAPABILITIES               0x10
#define AVRC_PDU_LIST_PLAYER_APP_ATTR           0x11
#define AVRC_PDU_LIST_PLAYER_APP_VALUES         0x12
#define AVRC_PDU_GET_CUR_PLAYER_APP_VALUE       0x13
#define AVRC_PDU_SET_PLAYER_APP_VALUE           0x14
#define AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT       0x15
#define AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT      0x16
#define AVRC_PDU_INFORM_DISPLAY_CHARSET         0x17
#define AVRC_PDU_INFORM_BATTERY_STAT_OF_CT      0x18
#define AVRC_PDU_GET_ELEMENT_ATTR               0x20
#define AVRC_PDU_GET_PLAY_STATUS                0x30
#define AVRC_PDU_REGISTER_NOTIFICATION          0x31
#define AVRC_PDU_REQUEST_CONTINUATION_RSP       0x40
#define AVRC_PDU_ABORT_CONTINUATION_RSP         0x41
/* added in 1.4 */
#define AVRC_PDU_SET_ABSOLUTE_VOLUME            0x50
#define AVRC_PDU_SET_ADDRESSED_PLAYER           0x60
#define AVRC_PDU_SET_BROWSED_PLAYER             0x70
#define AVRC_PDU_GET_FOLDER_ITEMS               0x71
#define AVRC_PDU_CHANGE_PATH                    0x72
#define AVRC_PDU_GET_ITEM_ATTRIBUTES            0x73
#define AVRC_PDU_PLAY_ITEM                      0x74
#define AVRC_PDU_GET_TOTAL_NUM_OF_ITEMS         0x75        /* Added in post 1.5 */
#define AVRC_PDU_SEARCH                         0x80
#define AVRC_PDU_ADD_TO_NOW_PLAYING             0x90
#define AVRC_PDU_GENERAL_REJECT                 0xA0

/* Define the vendor unique id carried in the pass through data
*/
#define AVRC_PDU_NEXT_GROUP                     0x00
#define AVRC_PDU_PREV_GROUP                     0x01
/* the only pass through vendor unique commands defined by AVRC is the group navigation commands
 * The len for vendor unique data is 5 */
#define AVRC_PASS_THRU_GROUP_LEN                5

#define AVRC_PDU_INVALID                        0xff
/* 6.15.3 error status code for general reject */
#define AVRC_STS_BAD_CMD        0x00    /* Invalid command, sent if TG received a PDU that it did not understand. */
#define AVRC_STS_BAD_PARAM      0x01    /* Invalid parameter, sent if the TG received a PDU with a parameter ID that it did not understand. Sent if there is only one parameter ID in the PDU. */
#define AVRC_STS_NOT_FOUND      0x02    /* Specified parameter not found., sent if the parameter ID is understood, but content is wrong or corrupted. */
#define AVRC_STS_INTERNAL_ERR   0x03    /* Internal Error, sent if there are error conditions not covered by a more specific error code. */
#define AVRC_STS_NO_ERROR       0x04    /* Operation completed without error.  This is the status that should be returned if the operation was successful. */
#define AVRC_STS_UID_CHANGED    0x05    /* UID Changed - The UIDs on the device have changed */
/* #define AVRC_STS_GEN_ERROR      0x06    Unknown Error - this is changed to "reserved" */
#define AVRC_STS_BAD_DIR        0x07    /* Invalid Direction - The Direction parameter is invalid - Change Path*/
#define AVRC_STS_NOT_DIR        0x08    /* Not a Directory - The UID provided does not refer to a folder item  Change Path*/
#define AVRC_STS_NOT_EXIST      0x09    /* Does Not Exist - The UID provided does not refer to any item    Change Path, PlayItem, AddToNowPlaying, GetItemAttributes*/
#define AVRC_STS_BAD_SCOPE      0x0a    /* Invalid Scope - The scope parameter is invalid  GetFolderItems, PlayItem, AddToNowPlayer, GetItemAttributes, */
#define AVRC_STS_BAD_RANGE      0x0b    /* Range Out of Bounds - The start of range provided is not valid  GetFolderItems*/
#define AVRC_STS_UID_IS_DIR     0x0c    /* UID is a Directory - The UID provided refers to a directory, which cannot be handled by this media player   PlayItem, AddToNowPlaying */
#define AVRC_STS_IN_USE         0x0d    /* Media in Use - The media is not able to be used for this operation at this time PlayItem, AddToNowPlaying */
#define AVRC_STS_NOW_LIST_FULL  0x0e    /* Now Playing List Full - No more items can be added to the Now Playing List  AddToNowPlaying*/
#define AVRC_STS_SEARCH_NOT_SUP 0x0f    /* Search Not Supported - The Browsed Media Player does not support search Search */
#define AVRC_STS_SEARCH_BUSY    0x10    /* Search in Progress - A search operation is already in progress  Search*/
#define AVRC_STS_BAD_PLAYER_ID  0x11    /* Invalid Player Id - The specified Player Id does not refer to a valid player    SetAddressedPlayer, SetBrowsedPlayer*/
#define AVRC_STS_PLAYER_N_BR    0x12    /* Player Not Browsable - The Player Id supplied refers to a Media Player which does not support browsing. SetBrowsedPlayer */
#define AVRC_STS_PLAYER_N_ADDR  0x13    /* Player Not Addressed.  The Player Id supplied refers to a player which is not currently addressed, and the command is not able to be performed if the player is not set as addressed.   Search, SetBrowsedPlayer*/
#define AVRC_STS_BAD_SEARCH_RES 0x14    /* No valid Search Results - The Search result list does not contain valid entries, e.g. after being invalidated due to change of browsed player   GetFolderItems */
#define AVRC_STS_NO_AVAL_PLAYER 0x15    /* No available players ALL */
#define AVRC_STS_ADDR_PLAYER_CHG 0x16   /* Addressed Player Changed - Register Notification */
typedef uint8_t tAVRC_STS;

/* Define the Capability IDs
*/
#define AVRC_CAP_COMPANY_ID                     0x02
#define AVRC_CAP_EVENTS_SUPPORTED               0x03
#define AVRC_COMPANY_ID_LEN                     3
#define AVRC_CAPABILITY_OFFSET                  2

/* Define the Player Application Settings IDs
*/
#define AVRC_PLAYER_SETTING_EQUALIZER           0x01
#define AVRC_PLAYER_SETTING_REPEAT              0x02
#define AVRC_PLAYER_SETTING_SHUFFLE             0x03
#define AVRC_PLAYER_SETTING_SCAN                0x04
#define AVRC_PLAYER_SETTING_LOW_MENU_EXT        0x80
#define AVRC_PLAYER_SETTING_HIGH_MENU_EXT       0xff

/* Define the possible values of the Player Application Settings
*/
#define AVRC_PLAYER_VAL_OFF                     0x01
#define AVRC_PLAYER_VAL_ON                      0x02
#define AVRC_PLAYER_VAL_SINGLE_REPEAT           0x02
#define AVRC_PLAYER_VAL_ALL_REPEAT              0x03
#define AVRC_PLAYER_VAL_GROUP_REPEAT            0x04
#define AVRC_PLAYER_VAL_ALL_SHUFFLE             0x02
#define AVRC_PLAYER_VAL_GROUP_SHUFFLE           0x03
#define AVRC_PLAYER_VAL_ALL_SCAN                0x02
#define AVRC_PLAYER_VAL_GROUP_SCAN              0x03

/* Define the possible values of Battery Status PDU
*/
#define AVRC_BATTERY_STATUS_NORMAL              0x00
#define AVRC_BATTERY_STATUS_WARNING             0x01
#define AVRC_BATTERY_STATUS_CRITICAL            0x02
#define AVRC_BATTERY_STATUS_EXTERNAL            0x03
#define AVRC_BATTERY_STATUS_FULL_CHARGE         0x04
typedef uint8_t tAVRC_BATTERY_STATUS;

/* Define character set */
#define AVRC_CHAR_SET_SIZE                      2

/* Define the Media Attribute IDs
*/
#define AVRC_MEDIA_ATTR_ID_TITLE                 0x00000001
#define AVRC_MEDIA_ATTR_ID_ARTIST                0x00000002
#define AVRC_MEDIA_ATTR_ID_ALBUM                 0x00000003
#define AVRC_MEDIA_ATTR_ID_TRACK_NUM             0x00000004
#define AVRC_MEDIA_ATTR_ID_NUM_TRACKS            0x00000005
#define AVRC_MEDIA_ATTR_ID_GENRE                 0x00000006
#define AVRC_MEDIA_ATTR_ID_PLAYING_TIME          0x00000007        /* in miliseconds */
#define AVRC_MAX_NUM_MEDIA_ATTR_ID               7

/* Define the possible values of play state
*/
#define AVRC_PLAYSTATE_RESP_MSG_SIZE            9
#define AVRC_PLAYSTATE_STOPPED                  0x00    /* Stopped */
#define AVRC_PLAYSTATE_PLAYING                  0x01    /* Playing */
#define AVRC_PLAYSTATE_PAUSED                   0x02    /* Paused  */
#define AVRC_PLAYSTATE_FWD_SEEK                 0x03    /* Fwd Seek*/
#define AVRC_PLAYSTATE_REV_SEEK                 0x04    /* Rev Seek*/
#define AVRC_PLAYSTATE_ERROR                    0xFF    /* Error   */
typedef uint8_t tAVRC_PLAYSTATE;

/* Define the events that can be registered for notifications
*/
#define AVRC_EVT_PLAY_STATUS_CHANGE             0x01
#define AVRC_EVT_TRACK_CHANGE                   0x02
#define AVRC_EVT_TRACK_REACHED_END              0x03
#define AVRC_EVT_TRACK_REACHED_START            0x04
#define AVRC_EVT_PLAY_POS_CHANGED               0x05
#define AVRC_EVT_BATTERY_STATUS_CHANGE          0x06
#define AVRC_EVT_SYSTEM_STATUS_CHANGE           0x07
#define AVRC_EVT_APP_SETTING_CHANGE             0x08
/* added in AVRCP 1.4 */
#define AVRC_EVT_NOW_PLAYING_CHANGE             0x09
#define AVRC_EVT_AVAL_PLAYERS_CHANGE            0x0a
#define AVRC_EVT_ADDR_PLAYER_CHANGE             0x0b
#define AVRC_EVT_UIDS_CHANGE                    0x0c
#define AVRC_EVT_VOLUME_CHANGE                  0x0d

/* the number of events that can be registered for notifications */
#define AVRC_NUM_NOTIF_EVENTS                   0x0d

#define AVRC_EVT_MSG_LEN_1                      0x01
#define AVRC_EVT_MSG_LEN_2                      0x02
#define AVRC_EVT_MSG_LEN_5                      0x05
#define AVRC_EVT_MSG_LEN_9                      0x09

#define AVRC_MAX_VOLUME                         0x7F

/* Define the possible values of system status
*/
#define AVRC_SYSTEMSTATE_PWR_ON                 0x00
#define AVRC_SYSTEMSTATE_PWR_OFF                0x01
#define AVRC_SYSTEMSTATE_PWR_UNPLUGGED          0x02
typedef uint8_t tAVRC_SYSTEMSTATE;

/* the frequently used character set ids */
#define AVRC_CHARSET_ID_ASCII                  ((uint16_t) 0x0003) /* ASCII */
#define AVRC_CHARSET_ID_UTF8                   ((uint16_t) 0x006a) /* UTF-8 */
#define AVRC_CHARSET_ID_UTF16                  ((uint16_t) 0x03f7) /* 1015 */
#define AVRC_CHARSET_ID_UTF32                  ((uint16_t) 0x03f9) /* 1017 */

/*****************************************************************************
**  Advanced Control
*****************************************************************************/
#define AVRC_ITEM_PLAYER            0x01
#define AVRC_ITEM_FOLDER            0x02
#define AVRC_ITEM_MEDIA             0x03

#define AVRC_SCOPE_PLAYER_LIST      0x00  /* Media Player Item - Contains all available media players */
#define AVRC_SCOPE_FILE_SYSTEM      0x01  /* Folder Item, Media Element Item
                                             - The virtual filesystem containing the media content of the browsed player */
#define AVRC_SCOPE_SEARCH           0x02  /* Media Element Item  The results of a search operation on the browsed player */
#define AVRC_SCOPE_NOW_PLAYING      0x03  /* Media Element Item  The Now Playing list (or queue) of the addressed player */

#define AVRC_FOLDER_ITEM_COUNT_NONE 0xFF

/* folder type */
#define AVRC_FOLDER_TYPE_MIXED      0x00
#define AVRC_FOLDER_TYPE_TITLES     0x01
#define AVRC_FOLDER_TYPE_ALNUMS     0x02
#define AVRC_FOLDER_TYPE_ARTISTS    0x03
#define AVRC_FOLDER_TYPE_GENRES     0x04
#define AVRC_FOLDER_TYPE_PLAYLISTS  0x05
#define AVRC_FOLDER_TYPE_YEARS      0x06

/* major player type */
#define AVRC_MJ_TYPE_AUDIO          0x01  /* Audio */
#define AVRC_MJ_TYPE_VIDEO          0x02  /* Video */
#define AVRC_MJ_TYPE_BC_AUDIO       0x04  /* Broadcasting Audio */
#define AVRC_MJ_TYPE_BC_VIDEO       0x08  /* Broadcasting Video */
#define AVRC_MJ_TYPE_INVALID        0xF0

/* player sub type */
#define AVRC_SUB_TYPE_NONE          0x00
#define AVRC_SUB_TYPE_AUDIO_BOOK    0x01  /* Audio Book */
#define AVRC_SUB_TYPE_PODCAST       0x02  /* Podcast */
#define AVRC_SUB_TYPE_INVALID       0xFC

/* media item - media type */
#define AVRC_MEDIA_TYPE_AUDIO       0x00
#define AVRC_MEDIA_TYPE_VIDEO       0x01

#define AVRC_DIR_UP                 0x00  /* Folder Up */
#define AVRC_DIR_DOWN               0x01  /* Folder Down */

#define AVRC_UID_SIZE               8
typedef uint8_t tAVRC_UID[AVRC_UID_SIZE];

/*****************************************************************************
**  player attribute - supported features
*****************************************************************************/
#define AVRC_PF_SELECT_BIT_NO           0
#define AVRC_PF_SELECT_MASK             0x01
#define AVRC_PF_SELECT_OFF              0
#define AVRC_PF_SELECT_SUPPORTED(x)     ((x)[AVRC_PF_SELECT_OFF] & AVRC_PF_SELECT_MASK)

#define AVRC_PF_UP_BIT_NO               1
#define AVRC_PF_UP_MASK                 0x02
#define AVRC_PF_UP_OFF                  0
#define AVRC_PF_UP_SUPPORTED(x)         ((x)[AVRC_PF_UP_OFF] & AVRC_PF_UP_MASK)

#define AVRC_PF_DOWN_BIT_NO             2
#define AVRC_PF_DOWN_MASK               0x04
#define AVRC_PF_DOWN_OFF                0
#define AVRC_PF_DOWN_SUPPORTED(x)       ((x)[AVRC_PF_DOWN_OFF] & AVRC_PF_DOWN_MASK)

#define AVRC_PF_LEFT_BIT_NO             3
#define AVRC_PF_LEFT_MASK               0x08
#define AVRC_PF_LEFT_OFF                0
#define AVRC_PF_LEFT_SUPPORTED(x)       ((x)[AVRC_PF_LEFT_OFF] & AVRC_PF_LEFT_MASK)

#define AVRC_PF_RIGHT_BIT_NO            4
#define AVRC_PF_RIGHT_MASK              0x10
#define AVRC_PF_RIGHT_OFF               0
#define AVRC_PF_RIGHT_SUPPORTED(x)      ((x)[AVRC_PF_RIGHT_OFF] & AVRC_PF_RIGHT_MASK)

#define AVRC_PF_RIGHTUP_BIT_NO          5
#define AVRC_PF_RIGHTUP_MASK            0x20
#define AVRC_PF_RIGHTUP_OFF             0
#define AVRC_PF_RIGHTUP_SUPPORTED(x)    ((x)[AVRC_PF_RIGHTUP_OFF] & AVRC_PF_RIGHTUP_MASK)

#define AVRC_PF_RIGHTDOWN_BIT_NO        6
#define AVRC_PF_RIGHTDOWN_MASK          0x40
#define AVRC_PF_RIGHTDOWN_OFF           0
#define AVRC_PF_RIGHTDOWN_SUPPORTED(x)  ((x)[AVRC_PF_RIGHTDOWN_OFF] & AVRC_PF_RIGHTDOWN_MASK)

#define AVRC_PF_LEFTUP_BIT_NO           7
#define AVRC_PF_LEFTUP_MASK             0x80
#define AVRC_PF_LEFTUP_OFF              0
#define AVRC_PF_LEFTUP_SUPPORTED(x)     ((x)[AVRC_PF_LEFTUP_OFF] & AVRC_PF_LEFTUP_MASK)

#define AVRC_PF_LEFTDOWN_BIT_NO         8
#define AVRC_PF_LEFTDOWN_MASK           0x01
#define AVRC_PF_LEFTDOWN_OFF            1
#define AVRC_PF_LEFTDOWN_SUPPORTED(x)   ((x)[AVRC_PF_LEFTDOWN_OFF] & AVRC_PF_LEFTDOWN_MASK)

#define AVRC_PF_ROOT_MENU_BIT_NO        9
#define AVRC_PF_ROOT_MENU_MASK          0x02
#define AVRC_PF_ROOT_MENU_OFF           1
#define AVRC_PF_ROOT_MENU_SUPPORTED(x)  ((x)[AVRC_PF_ROOT_MENU_OFF] & AVRC_PF_ROOT_MENU_MASK)

#define AVRC_PF_SETUP_MENU_BIT_NO       10
#define AVRC_PF_SETUP_MENU_MASK         0x04
#define AVRC_PF_SETUP_MENU_OFF          1
#define AVRC_PF_SETUP_MENU_SUPPORTED(x) ((x)[AVRC_PF_SETUP_MENU_OFF] & AVRC_PF_SETUP_MENU_MASK)

#define AVRC_PF_CONTENTS_MENU_BIT_NO    11
#define AVRC_PF_CONTENTS_MENU_MASK      0x08
#define AVRC_PF_CONTENTS_MENU_OFF       1
#define AVRC_PF_CONTENTS_MENU_SUPPORTED(x)  ((x)[AVRC_PF_CONTENTS_MENU_OFF] & AVRC_PF_CONTENTS_MENU_MASK)

#define AVRC_PF_FAVORITE_MENU_BIT_NO    12
#define AVRC_PF_FAVORITE_MENU_MASK      0x10
#define AVRC_PF_FAVORITE_MENU_OFF       1
#define AVRC_PF_FAVORITE_MENU_SUPPORTED(x)  ((x)[AVRC_PF_FAVORITE_MENU_OFF] & AVRC_PF_FAVORITE_MENU_MASK)

#define AVRC_PF_EXIT_BIT_NO             13
#define AVRC_PF_EXIT_MASK               0x20
#define AVRC_PF_EXIT_OFF                1
#define AVRC_PF_EXIT_SUPPORTED(x)       ((x)[AVRC_PF_EXIT_OFF] & AVRC_PF_EXIT_MASK)

#define AVRC_PF_0_BIT_NO                14
#define AVRC_PF_0_MASK                  0x40
#define AVRC_PF_0_OFF                   1
#define AVRC_PF_0_SUPPORTED(x)          ((x)[AVRC_PF_0_OFF] & AVRC_PF_0_MASK)

#define AVRC_PF_1_BIT_NO                15
#define AVRC_PF_1_MASK                  0x80
#define AVRC_PF_1_OFF                   1
#define AVRC_PF_1_SUPPORTED(x)          ((x)[AVRC_PF_1_OFF] & AVRC_PF_1_MASK)

#define AVRC_PF_2_BIT_NO                16
#define AVRC_PF_2_MASK                  0x01
#define AVRC_PF_2_OFF                   2
#define AVRC_PF_2_SUPPORTED(x)          ((x)[AVRC_PF_2_OFF] & AVRC_PF_2_MASK)

#define AVRC_PF_3_BIT_NO                17
#define AVRC_PF_3_MASK                  0x02
#define AVRC_PF_3_OFF                   2
#define AVRC_PF_3_SUPPORTED(x)          ((x)[AVRC_PF_3_OFF] & AVRC_PF_3_MASK)

#define AVRC_PF_4_BIT_NO                18
#define AVRC_PF_4_MASK                  0x04
#define AVRC_PF_4_OFF                   2
#define AVRC_PF_4_SUPPORTED(x)          ((x)[AVRC_PF_4_OFF] & AVRC_PF_4_MASK)

#define AVRC_PF_5_BIT_NO                19
#define AVRC_PF_5_MASK                  0x08
#define AVRC_PF_5_OFF                   2
#define AVRC_PF_5_SUPPORTED(x)          ((x)[AVRC_PF_5_OFF] & AVRC_PF_5_MASK)

#define AVRC_PF_6_BIT_NO                20
#define AVRC_PF_6_MASK                  0x10
#define AVRC_PF_6_OFF                   2
#define AVRC_PF_6_SUPPORTED(x)          ((x)[AVRC_PF_6_OFF] & AVRC_PF_6_MASK)

#define AVRC_PF_7_BIT_NO                21
#define AVRC_PF_7_MASK                  0x20
#define AVRC_PF_7_OFF                   2
#define AVRC_PF_7_SUPPORTED(x)          ((x)[AVRC_PF_7_OFF] & AVRC_PF_7_MASK)

#define AVRC_PF_8_BIT_NO                22
#define AVRC_PF_8_MASK                  0x40
#define AVRC_PF_8_OFF                   2
#define AVRC_PF_8_SUPPORTED(x)          ((x)[AVRC_PF_8_OFF] & AVRC_PF_8_MASK)

#define AVRC_PF_9_BIT_NO                23
#define AVRC_PF_9_MASK                  0x80
#define AVRC_PF_9_OFF                   2
#define AVRC_PF_9_SUPPORTED(x)          ((x)[AVRC_PF_9_OFF] & AVRC_PF_9_MASK)

#define AVRC_PF_DOT_BIT_NO              24
#define AVRC_PF_DOT_MASK                0x01
#define AVRC_PF_DOT_OFF                 3
#define AVRC_PF_DOT_SUPPORTED(x)        ((x)[AVRC_PF_DOT_OFF] & AVRC_PF_DOT_MASK)

#define AVRC_PF_ENTER_BIT_NO            25
#define AVRC_PF_ENTER_MASK              0x02
#define AVRC_PF_ENTER_OFF               3
#define AVRC_PF_ENTER_SUPPORTED(x)      ((x)[AVRC_PF_ENTER_OFF] & AVRC_PF_ENTER_MASK)

#define AVRC_PF_CLEAR_BIT_NO            26
#define AVRC_PF_CLEAR_MASK              0x04
#define AVRC_PF_CLEAR_OFF               3
#define AVRC_PF_CLEAR_SUPPORTED(x)      ((x)[AVRC_PF_CLEAR_OFF] & AVRC_PF_CLEAR_MASK)

#define AVRC_PF_CHNL_UP_BIT_NO          27
#define AVRC_PF_CHNL_UP_MASK            0x08
#define AVRC_PF_CHNL_UP_OFF             3
#define AVRC_PF_CHNL_UP_SUPPORTED(x)    ((x)[AVRC_PF_CHNL_UP_OFF] & AVRC_PF_CHNL_UP_MASK)

#define AVRC_PF_CHNL_DOWN_BIT_NO        28
#define AVRC_PF_CHNL_DOWN_MASK          0x10
#define AVRC_PF_CHNL_DOWN_OFF           3
#define AVRC_PF_CHNL_DOWN_SUPPORTED(x)  ((x)[AVRC_PF_CHNL_DOWN_OFF] & AVRC_PF_CHNL_DOWN_MASK)

#define AVRC_PF_PREV_CHNL_BIT_NO        29
#define AVRC_PF_PREV_CHNL_MASK          0x20
#define AVRC_PF_PREV_CHNL_OFF           3
#define AVRC_PF_PREV_CHNL_SUPPORTED(x)  ((x)[AVRC_PF_PREV_CHNL_OFF] & AVRC_PF_PREV_CHNL_MASK)

#define AVRC_PF_SOUND_SEL_BIT_NO        30
#define AVRC_PF_SOUND_SEL_MASK          0x40
#define AVRC_PF_SOUND_SEL_OFF           3
#define AVRC_PF_SOUND_SEL_SUPPORTED(x)  ((x)[AVRC_PF_SOUND_SEL_OFF] & AVRC_PF_SOUND_SEL_MASK)

#define AVRC_PF_INPUT_SEL_BIT_NO        31
#define AVRC_PF_INPUT_SEL_MASK          0x80
#define AVRC_PF_INPUT_SEL_OFF           3
#define AVRC_PF_INPUT_SEL_SUPPORTED(x)  ((x)[AVRC_PF_INPUT_SEL_OFF] & AVRC_PF_INPUT_SEL_MASK)

#define AVRC_PF_DISP_INFO_BIT_NO        32
#define AVRC_PF_DISP_INFO_MASK          0x01
#define AVRC_PF_DISP_INFO_OFF           4
#define AVRC_PF_DISP_INFO_SUPPORTED(x)  ((x)[AVRC_PF_DISP_INFO_OFF] & AVRC_PF_DISP_INFO_MASK)

#define AVRC_PF_HELP_BIT_NO             33
#define AVRC_PF_HELP_MASK               0x02
#define AVRC_PF_HELP_OFF                4
#define AVRC_PF_HELP_SUPPORTED(x)       ((x)[AVRC_PF_HELP_OFF] & AVRC_PF_HELP_MASK)

#define AVRC_PF_PAGE_UP_BIT_NO          34
#define AVRC_PF_PAGE_UP_MASK            0x04
#define AVRC_PF_PAGE_UP_OFF             4
#define AVRC_PF_PAGE_UP_SUPPORTED(x)    ((x)[AVRC_PF_PAGE_UP_OFF] & AVRC_PF_PAGE_UP_MASK)

#define AVRC_PF_PAGE_DOWN_BIT_NO        35
#define AVRC_PF_PAGE_DOWN_MASK          0x08
#define AVRC_PF_PAGE_DOWN_OFF           4
#define AVRC_PF_PAGE_DOWN_SUPPORTED(x)  ((x)[AVRC_PF_PAGE_DOWN_OFF] & AVRC_PF_PAGE_DOWN_MASK)

#define AVRC_PF_POWER_BIT_NO            36
#define AVRC_PF_POWER_MASK              0x10
#define AVRC_PF_POWER_OFF               4
#define AVRC_PF_POWER_SUPPORTED(x)      ((x)[AVRC_PF_POWER_OFF] & AVRC_PF_POWER_MASK)

#define AVRC_PF_VOL_UP_BIT_NO           37
#define AVRC_PF_VOL_UP_MASK             0x20
#define AVRC_PF_VOL_UP_OFF              4
#define AVRC_PF_VOL_UP_SUPPORTED(x)     ((x)[AVRC_PF_VOL_UP_OFF] & AVRC_PF_VOL_UP_MASK)

#define AVRC_PF_VOL_DOWN_BIT_NO         38
#define AVRC_PF_VOL_DOWN_MASK           0x40
#define AVRC_PF_VOL_DOWN_OFF            4
#define AVRC_PF_VOL_DOWN_SUPPORTED(x)   ((x)[AVRC_PF_VOL_DOWN_OFF] & AVRC_PF_VOL_DOWN_MASK)

#define AVRC_PF_MUTE_BIT_NO             39
#define AVRC_PF_MUTE_MASK               0x80
#define AVRC_PF_MUTE_OFF                4
#define AVRC_PF_MUTE_SUPPORTED(x)       ((x)[AVRC_PF_MUTE_OFF] & AVRC_PF_MUTE_MASK)

#define AVRC_PF_PLAY_BIT_NO             40
#define AVRC_PF_PLAY_MASK               0x01
#define AVRC_PF_PLAY_OFF                5
#define AVRC_PF_PLAY_SUPPORTED(x)       ((x)[AVRC_PF_PLAY_OFF] & AVRC_PF_PLAY_MASK)

#define AVRC_PF_STOP_BIT_NO             41
#define AVRC_PF_STOP_MASK               0x02
#define AVRC_PF_STOP_OFF                5
#define AVRC_PF_STOP_SUPPORTED(x)       ((x)[AVRC_PF_STOP_OFF] & AVRC_PF_STOP_MASK)

#define AVRC_PF_PAUSE_BIT_NO            42
#define AVRC_PF_PAUSE_MASK              0x04
#define AVRC_PF_PAUSE_OFF               5
#define AVRC_PF_PAUSE_SUPPORTED(x)      ((x)[AVRC_PF_PAUSE_OFF] & AVRC_PF_PAUSE_MASK)

#define AVRC_PF_RECORD_BIT_NO           43
#define AVRC_PF_RECORD_MASK             0x08
#define AVRC_PF_RECORD_OFF              5
#define AVRC_PF_RECORD_SUPPORTED(x)     ((x)[AVRC_PF_RECORD_OFF] & AVRC_PF_RECORD_MASK)

#define AVRC_PF_REWIND_BIT_NO           44
#define AVRC_PF_REWIND_MASK             0x10
#define AVRC_PF_REWIND_OFF              5
#define AVRC_PF_REWIND_SUPPORTED(x)     ((x)[AVRC_PF_REWIND_OFF] & AVRC_PF_REWIND_MASK)

#define AVRC_PF_FAST_FWD_BIT_NO         45
#define AVRC_PF_FAST_FWD_MASK           0x20
#define AVRC_PF_FAST_FWD_OFF            5
#define AVRC_PF_FAST_FWD_SUPPORTED(x)   ((x)[AVRC_PF_FAST_FWD_OFF] & AVRC_PF_FAST_FWD_MASK)

#define AVRC_PF_EJECT_BIT_NO            46
#define AVRC_PF_EJECT_MASK              0x40
#define AVRC_PF_EJECT_OFF               5
#define AVRC_PF_EJECT_SUPPORTED(x)      ((x)[AVRC_PF_EJECT_OFF] & AVRC_PF_EJECT_MASK)

#define AVRC_PF_FORWARD_BIT_NO          47
#define AVRC_PF_FORWARD_MASK            0x80
#define AVRC_PF_FORWARD_OFF             5
#define AVRC_PF_FORWARD_SUPPORTED(x)    ((x)[AVRC_PF_FORWARD_OFF] & AVRC_PF_FORWARD_MASK)

#define AVRC_PF_BACKWARD_BIT_NO         48
#define AVRC_PF_BACKWARD_MASK           0x01
#define AVRC_PF_BACKWARD_OFF            6
#define AVRC_PF_BACKWARD_SUPPORTED(x)   ((x)[AVRC_PF_BACKWARD_OFF] & AVRC_PF_BACKWARD_MASK)

#define AVRC_PF_ANGLE_BIT_NO            49
#define AVRC_PF_ANGLE_MASK              0x02
#define AVRC_PF_ANGLE_OFF               6
#define AVRC_PF_ANGLE_SUPPORTED(x)      ((x)[AVRC_PF_ANGLE_OFF] & AVRC_PF_ANGLE_MASK)

#define AVRC_PF_SUBPICTURE_BIT_NO       50
#define AVRC_PF_SUBPICTURE_MASK         0x04
#define AVRC_PF_SUBPICTURE_OFF          6
#define AVRC_PF_SUBPICTURE_SUPPORTED(x) ((x)[AVRC_PF_SUBPICTURE_OFF] & AVRC_PF_SUBPICTURE_MASK)

#define AVRC_PF_F1_BIT_NO               51
#define AVRC_PF_F1_MASK                 0x08
#define AVRC_PF_F1_OFF                  6
#define AVRC_PF_F1_SUPPORTED(x)         ((x)[AVRC_PF_F1_OFF] & AVRC_PF_F1_MASK)

#define AVRC_PF_F2_BIT_NO               52
#define AVRC_PF_F2_MASK                 0x10
#define AVRC_PF_F2_OFF                  6
#define AVRC_PF_F2_SUPPORTED(x)         ((x)[AVRC_PF_F2_OFF] & AVRC_PF_F2_MASK)

#define AVRC_PF_F3_BIT_NO               53
#define AVRC_PF_F3_MASK                 0x20
#define AVRC_PF_F3_OFF                  6
#define AVRC_PF_F3_SUPPORTED(x)         ((x)[AVRC_PF_F3_OFF] & AVRC_PF_F3_MASK)

#define AVRC_PF_F4_BIT_NO               54
#define AVRC_PF_F4_MASK                 0x40
#define AVRC_PF_F4_OFF                  6
#define AVRC_PF_F4_SUPPORTED(x)         ((x)[AVRC_PF_F4_OFF] & AVRC_PF_F4_MASK)

#define AVRC_PF_F5_BIT_NO               55
#define AVRC_PF_F5_MASK                 0x80
#define AVRC_PF_F5_OFF                  6
#define AVRC_PF_F5_SUPPORTED(x)         ((x)[AVRC_PF_F5_OFF] & AVRC_PF_F5_MASK)

/* Vendor unique. This PASSTHROUGH command is supported. */
#define AVRC_PF_VENDOR_BIT_NO           56
#define AVRC_PF_VENDOR_MASK             0x01
#define AVRC_PF_VENDOR_OFF              7
#define AVRC_PF_VENDOR_SUPPORTED(x)     ((x)[AVRC_PF_VENDOR_OFF] & AVRC_PF_VENDOR_MASK)

/* Basic Group Navigation.  This overrules the SDP entry as it is set per player.7 */
#define AVRC_PF_GROUP_NAVI_BIT_NO       57
#define AVRC_PF_GROUP_NAVI_MASK         0x02
#define AVRC_PF_GROUP_NAVI_OFF          7
#define AVRC_PF_GROUP_NAVI_SUPPORTED(x) ((x)[AVRC_PF_GROUP_NAVI_OFF] & AVRC_PF_GROUP_NAVI_MASK)

/* Advanced Control Player.  This bit is set if the player supports at least AVRCP 1.4. */
#define AVRC_PF_ADV_CTRL_BIT_NO         58
#define AVRC_PF_ADV_CTRL_MASK           0x04
#define AVRC_PF_ADV_CTRL_OFF            7
#define AVRC_PF_ADV_CTRL_SUPPORTED(x)   ((x)[AVRC_PF_ADV_CTRL_OFF] & AVRC_PF_ADV_CTRL_MASK)

/* Browsing.  This bit is set if the player supports browsing. */
#define AVRC_PF_BROWSE_BIT_NO           59
#define AVRC_PF_BROWSE_MASK             0x08
#define AVRC_PF_BROWSE_OFF              7
#define AVRC_PF_BROWSE_SUPPORTED(x)     ((x)[AVRC_PF_BROWSE_OFF] & AVRC_PF_BROWSE_MASK)

/* Searching. This bit is set if the player supports searching. */
#define AVRC_PF_SEARCH_BIT_NO           60
#define AVRC_PF_SEARCH_MASK             0x10
#define AVRC_PF_SEARCH_OFF              7
#define AVRC_PF_SEARCH_SUPPORTED(x)     ((x)[AVRC_PF_SEARCH_OFF] & AVRC_PF_SEARCH_MASK)

/* AddToNowPlaying.  This bit is set if the player supports the AddToNowPlaying command. */
#define AVRC_PF_ADD2NOWPLAY_BIT_NO      61
#define AVRC_PF_ADD2NOWPLAY_MASK        0x20
#define AVRC_PF_ADD2NOWPLAY_OFF         7
#define AVRC_PF_ADD2NOWPLAY_SUPPORTED(x) ((x)[AVRC_PF_ADD2NOWPLAY_OFF] & AVRC_PF_ADD2NOWPLAY_MASK)

/* UIDs unique in player browse tree.  This bit is set if the player is able to maintain unique UIDs across the player browse tree. */
#define AVRC_PF_UID_UNIQUE_BIT_NO       62
#define AVRC_PF_UID_UNIQUE_MASK         0x40
#define AVRC_PF_UID_UNIQUE_OFF          7
#define AVRC_PF_UID_UNIQUE_SUPPORTED(x) ((x)[AVRC_PF_UID_UNIQUE_OFF] & AVRC_PF_UID_UNIQUE_MASK)

/* OnlyBrowsableWhenAddressed.  This bit is set if the player is only able to be browsed when it is set as the Addressed Player. */
#define AVRC_PF_BR_WH_ADDR_BIT_NO       63
#define AVRC_PF_BR_WH_ADDR_MASK         0x80
#define AVRC_PF_BR_WH_ADDR_OFF          7
#define AVRC_PF_BR_WH_ADDR_SUPPORTED(x) ((x)[AVRC_PF_BR_WH_ADDR_OFF] & AVRC_PF_BR_WH_ADDR_MASK)

/* OnlySearchableWhenAddressed.  This bit is set if the player is only able to be searched when it is set as the Addressed player. */
#define AVRC_PF_SEARCH_WH_ADDR_BIT_NO   64
#define AVRC_PF_SEARCH_WH_ADDR_MASK     0x01
#define AVRC_PF_SEARCH_WH_ADDR_OFF      8
#define AVRC_PF_SEARCH_WH_ADDR_SUPPORTED(x) ((x)[AVRC_PF_SEARCH_WH_ADDR_OFF] & AVRC_PF_SEARCH_WH_ADDR_MASK)

/* NowPlaying.  This bit is set if the player supports the NowPlaying folder.  Note that for all players that support browsing this bit shall be set */
#define AVRC_PF_NOW_PLAY_BIT_NO         65
#define AVRC_PF_NOW_PLAY_MASK           0x02
#define AVRC_PF_NOW_PLAY_OFF            8
#define AVRC_PF_NOW_PLAY_SUPPORTED(x)   ((x)[AVRC_PF_NOW_PLAY_OFF] & AVRC_PF_NOW_PLAY_MASK)

/* UIDPersistency.  This bit is set if the Player is able to persist UID values between AVRCP Browse Reconnect */
#define AVRC_PF_UID_PERSIST_BIT_NO      66
#define AVRC_PF_UID_PERSIST_MASK        0x04
#define AVRC_PF_UID_PERSIST_OFF         8
#define AVRC_PF_UID_PERSIST_SUPPORTED(x) ((x)[AVRC_PF_UID_PERSIST_OFF] & AVRC_PF_UID_PERSIST_MASK)

/* NumberOfItems. This bit is set if player supports the GetTotalNumberOfItems browsing command. */
#define AVRC_PF_GET_NUM_OF_ITEMS_BIT_NO    67
#define AVRC_PF_GET_NUM_OF_ITEMS_MASK      0x08
#define AVRC_PF_GET_NUM_OF_ITEMS_OFF       8
#define AVRC_PF_GET_NUM_OF_ITEMS_SUPPORTED(x) ((x)[AVRC_PF_GET_NUM_OF_ITEMS_OFF] & AVRC_PF_GET_NUM_OF_ITEMS_MASK)

/*****************************************************************************
**  data type definitions
*****************************************************************************/

/*
This structure contains the header parameters of an AV/C message.
*/
typedef struct
{
    uint8_t ctype;          /* Command type.  */
    uint8_t subunit_type;   /* Subunit type. */
    uint8_t subunit_id;     /* Subunit ID.  This value is typically ignored in AVRCP,
                             * except for VENDOR DEPENDENT messages when the value is
                             * vendor-dependent.  Value range is 0-7. */
    uint8_t opcode;         /* Op Code (passthrough, vendor, etc) */
} tAVRC_HDR;

/* This structure contains a UNIT INFO message. */
typedef struct
{
    tAVRC_HDR   hdr;        /* Message header. */
    uint32_t    company_id; /* Company identifier. */
    uint8_t     unit_type;  /* Unit type.  Uses the same values as subunit type. */
    uint8_t     unit;       /* This value is vendor dependent and typically zero.  */
} tAVRC_MSG_UNIT;

/* This structure contains a SUBUNIT INFO message. */
typedef struct
{
    tAVRC_HDR   hdr;        /* Message header. */
    uint8_t     subunit_type[AVRC_SUB_TYPE_LEN];
                            /* Array containing subunit type values.  */
    bool        panel;      /* true if the panel subunit type is in the
                             * subunit_type array, false otherwise. */
    uint8_t     page;       /* Specifies which part of the subunit type table is
                             * returned.  For AVRCP it is typically zero.
                             * Value range is 0-7. */
} tAVRC_MSG_SUB;

/* This structure contains a VENDOR DEPENDENT message. */
typedef struct
{
    tAVRC_HDR   hdr;        /* Message header. */
    uint32_t    company_id; /* Company identifier. */
    uint8_t    *p_vendor_data;/* Pointer to vendor dependent data. */
    uint16_t    vendor_len; /* Length in bytes of vendor dependent data. */
} tAVRC_MSG_VENDOR;

/* PASS THROUGH message structure */
typedef struct
{
    tAVRC_HDR   hdr;        /* hdr.ctype Unused.
                             * hdr.subunit_type Unused.
                             * hdr.subunit_id Unused. */
    uint8_t     op_id;      /* Operation ID.  */
    uint8_t     state;      /* Keypress state.  */
    uint8_t    *p_pass_data;/* Pointer to data.  This parameter is only valid
                             * when the op_id is AVRC_ID_VENDOR.*/
    uint8_t     pass_len;   /* Length in bytes of data. This parameter is only
                             * valid when the op_id is AVRC_ID_VENDOR.*/
} tAVRC_MSG_PASS;

/* Command/Response indicator. */
#define AVRC_CMD            AVCT_CMD    /* Command message */
#define AVRC_RSP            AVCT_RSP    /* Response message */

/* Browsing channel message structure */
typedef struct
{
    tAVRC_HDR   hdr;            /* hdr.ctype AVRC_CMD or AVRC_RSP.
                                 * hdr.subunit_type Unused.
                                 * hdr.subunit_id Unused. */
    uint8_t    *p_browse_data;  /* Pointer to data.  */
    uint16_t    browse_len;     /* Length in bytes of data. */
    BT_HDR     *p_browse_pkt;   /* The GKI buffer received. Set to NULL, if the callback function wants to keep the buffer */
} tAVRC_MSG_BROWSE;

/* This is a union of all message type structures. */
typedef union
{
    tAVRC_HDR           hdr;    /* Message header. */
    tAVRC_MSG_UNIT      unit;   /* UNIT INFO message. */
    tAVRC_MSG_SUB       sub;    /* SUBUNIT INFO message. */
    tAVRC_MSG_VENDOR    vendor; /* VENDOR DEPENDENT message. */
    tAVRC_MSG_PASS      pass;   /* PASS THROUGH message. */
    tAVRC_MSG_BROWSE    browse; /* messages thru browsing channel */
} tAVRC_MSG;

/* macros */
#define AVRC_IS_VALID_CAP_ID(a)           ((((a) == AVRC_CAP_COMPANY_ID) || ((a) == AVRC_CAP_EVENTS_SUPPORTED)) ? true : false)

#define AVRC_IS_VALID_EVENT_ID(a)           ((((a) >= AVRC_EVT_PLAY_STATUS_CHANGE) && \
                                              ((a) <= AVRC_EVT_VOLUME_CHANGE)) ? true : false)

#define AVRC_IS_VALID_ATTRIBUTE(a)          ((((((a) > 0) && (a) <= AVRC_PLAYER_SETTING_SCAN)) || \
                                              ((a) >= AVRC_PLAYER_SETTING_LOW_MENU_EXT)) ? true : false)

#define AVRC_IS_VALID_MEDIA_ATTRIBUTE(a)    (((a) >= AVRC_MEDIA_ATTR_ID_TITLE) && \
                                             ((a) <= AVRC_MEDIA_ATTR_ID_PLAYING_TIME) ? true : false)

#define AVRC_IS_VALID_BATTERY_STATUS(a)    (((a) <= AVRC_BATTERY_STATUS_FULL_CHARGE) ? true : false)

#define AVRC_IS_VALID_SYSTEM_STATUS(a)    (((a) <= AVRC_SYSTEMSTATE_PWR_UNPLUGGED) ? true : false)

#define AVRC_IS_VALID_GROUP(a)    (((a) <= AVRC_PDU_PREV_GROUP) ? true : false)

/* Company ID is 24-bit integer We can not use the macros in bt_types.h */
#define AVRC_CO_ID_TO_BE_STREAM(p, u32) {*(p)++ = (uint8_t)((u32) >> 16); *(p)++ = (uint8_t)((u32) >> 8); *(p)++ = (uint8_t)(u32); }
#define AVRC_BE_STREAM_TO_CO_ID(u32, p) {(u32) = (((uint32_t)(*((p) + 2))) + (((uint32_t)(*((p) + 1))) << 8) + (((uint32_t)(*(p))) << 16)); (p) += 3;}

/*****************************************************************************
**  data type definitions
*****************************************************************************/
#define AVRC_MAX_APP_ATTR_SIZE      16
#define AVRC_MAX_CHARSET_SIZE       16
#define AVRC_MAX_ELEM_ATTR_SIZE     8

/*****************************************************************************
**  Metadata transfer Building/Parsing definitions
*****************************************************************************/

typedef struct {
    uint16_t            charset_id;
    uint16_t            str_len;
    uint8_t             *p_str;
} tAVRC_FULL_NAME;

typedef struct {
    uint16_t            str_len;
    uint8_t             *p_str;
} tAVRC_NAME;

#ifndef AVRC_CAP_MAX_NUM_COMP_ID
#define AVRC_CAP_MAX_NUM_COMP_ID    4
#endif

#ifndef AVRC_CAP_MAX_NUM_EVT_ID
#define AVRC_CAP_MAX_NUM_EVT_ID     16
#endif

typedef union
{
    uint32_t company_id[AVRC_CAP_MAX_NUM_COMP_ID];
    uint8_t event_id[AVRC_CAP_MAX_NUM_EVT_ID];
} tAVRC_CAPS_PARAM;

typedef struct
{
    uint8_t attr_id;
    uint8_t attr_val;
} tAVRC_APP_SETTING;

typedef struct
{
    uint8_t attr_id;
    uint16_t charset_id;
    uint8_t str_len;
    uint8_t *p_str;
} tAVRC_APP_SETTING_TEXT;

typedef uint8_t tAVRC_FEATURE_MASK[AVRC_FEATURE_MASK_SIZE];

typedef struct
{
    uint16_t            player_id;      /* A unique identifier for this media player.*/
    uint8_t             major_type;     /* Use AVRC_MJ_TYPE_AUDIO, AVRC_MJ_TYPE_VIDEO, AVRC_MJ_TYPE_BC_AUDIO, or AVRC_MJ_TYPE_BC_VIDEO.*/
    uint32_t            sub_type;       /* Use AVRC_SUB_TYPE_NONE, AVRC_SUB_TYPE_AUDIO_BOOK, or AVRC_SUB_TYPE_PODCAST*/
    uint8_t             play_status;    /* Use AVRC_PLAYSTATE_STOPPED, AVRC_PLAYSTATE_PLAYING, AVRC_PLAYSTATE_PAUSED, AVRC_PLAYSTATE_FWD_SEEK,
                                            AVRC_PLAYSTATE_REV_SEEK, or AVRC_PLAYSTATE_ERROR*/
    tAVRC_FEATURE_MASK  features;       /* Supported feature bit mask*/
    tAVRC_FULL_NAME     name;           /* The player name, name length and character set id.*/
} tAVRC_ITEM_PLAYER;

typedef struct
{
    tAVRC_UID           uid;            /* The uid of this folder */
    uint8_t             type;           /* Use AVRC_FOLDER_TYPE_MIXED, AVRC_FOLDER_TYPE_TITLES,
                                           AVRC_FOLDER_TYPE_ALNUMS, AVRC_FOLDER_TYPE_ARTISTS, AVRC_FOLDER_TYPE_GENRES,
                                           AVRC_FOLDER_TYPE_PLAYLISTS, or AVRC_FOLDER_TYPE_YEARS.*/
    bool                playable;       /* true, if the folder can be played. */
    tAVRC_FULL_NAME     name;           /* The folder name, name length and character set id. */
} tAVRC_ITEM_FOLDER;

typedef struct
{
    uint32_t            attr_id;        /* Use AVRC_MEDIA_ATTR_ID_TITLE, AVRC_MEDIA_ATTR_ID_ARTIST, AVRC_MEDIA_ATTR_ID_ALBUM,
                                           AVRC_MEDIA_ATTR_ID_TRACK_NUM, AVRC_MEDIA_ATTR_ID_NUM_TRACKS,
                                           AVRC_MEDIA_ATTR_ID_GENRE, AVRC_MEDIA_ATTR_ID_PLAYING_TIME */
    tAVRC_FULL_NAME     name;           /* The attribute value, value length and character set id. */
} tAVRC_ATTR_ENTRY;

typedef struct
{
    tAVRC_UID           uid;            /* The uid of this media element item */
    uint8_t             type;           /* Use AVRC_MEDIA_TYPE_AUDIO or AVRC_MEDIA_TYPE_VIDEO. */
    tAVRC_FULL_NAME     name;           /* The media name, name length and character set id. */
    uint8_t             attr_count;     /* The number of attributes in p_attr_list */
    tAVRC_ATTR_ENTRY*   p_attr_list;    /* Attribute entry list. */
} tAVRC_ITEM_MEDIA;

typedef struct
{
    uint8_t                 item_type;  /* AVRC_ITEM_PLAYER, AVRC_ITEM_FOLDER, or AVRC_ITEM_MEDIA */
    union
    {
        tAVRC_ITEM_PLAYER   player;     /* The properties of a media player item.*/
        tAVRC_ITEM_FOLDER   folder;     /* The properties of a folder item.*/
        tAVRC_ITEM_MEDIA    media;      /* The properties of a media item.*/
    } u;
} tAVRC_ITEM;

/* GetCapability */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     capability_id;
} tAVRC_GET_CAPS_CMD;

/* ListPlayerAppValues */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     attr_id;
} tAVRC_LIST_APP_VALUES_CMD;

/* GetCurAppValue */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     num_attr;
    uint8_t     attrs[AVRC_MAX_APP_ATTR_SIZE];
} tAVRC_GET_CUR_APP_VALUE_CMD;

/* SetAppValue */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     num_val;
    tAVRC_APP_SETTING   *p_vals;
} tAVRC_SET_APP_VALUE_CMD;

/* GetAppAttrTxt */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     num_attr;
    uint8_t     attrs[AVRC_MAX_APP_ATTR_SIZE];
} tAVRC_GET_APP_ATTR_TXT_CMD;

/* GetAppValueTxt */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     attr_id;
    uint8_t     num_val;
    uint8_t     vals[AVRC_MAX_APP_ATTR_SIZE];
} tAVRC_GET_APP_VAL_TXT_CMD;

/* InformCharset */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     num_id;
    uint16_t    charsets[AVRC_MAX_CHARSET_SIZE];
} tAVRC_INFORM_CHARSET_CMD;

/* InformBatteryStatus */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     battery_status;
} tAVRC_BATTERY_STATUS_CMD;

/* GetElemAttrs */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     num_attr;
    uint32_t    attrs[AVRC_MAX_ELEM_ATTR_SIZE];
} tAVRC_GET_ELEM_ATTRS_CMD;

/* RegNotify */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     event_id;
    uint32_t    param;
} tAVRC_REG_NOTIF_CMD;

/* SetAddrPlayer */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint16_t    player_id;
} tAVRC_SET_ADDR_PLAYER_CMD;

/* SetBrowsedPlayer */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint16_t    player_id;
} tAVRC_SET_BR_PLAYER_CMD;

/* SetAbsVolume */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     volume;
} tAVRC_SET_VOLUME_CMD;

/* GetFolderItems */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     scope;
    uint32_t    start_item;
    uint32_t    end_item;
    uint8_t     attr_count;
    uint32_t    *p_attr_list;
} tAVRC_GET_ITEMS_CMD;

/* ChangePath */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint16_t    uid_counter;
    uint8_t     direction;
    tAVRC_UID   folder_uid;
} tAVRC_CHG_PATH_CMD;

/* GetItemAttrs */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     scope;
    tAVRC_UID   uid;
    uint16_t    uid_counter;
    uint8_t     attr_count;
    uint32_t    *p_attr_list;
} tAVRC_GET_ATTRS_CMD;

/* Search */
typedef struct
{
    uint8_t         pdu;
    tAVRC_STS       status;
    uint8_t         opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    tAVRC_FULL_NAME string;
} tAVRC_SEARCH_CMD;

/* PlayItem */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     scope;
    tAVRC_UID   uid;
    uint16_t    uid_counter;
} tAVRC_PLAY_ITEM_CMD;

/* AddToNowPlaying */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     scope;
    tAVRC_UID   uid;
    uint16_t    uid_counter;
} tAVRC_ADD_TO_PLAY_CMD;

/* GetTotalNumOfItems */
typedef struct
{
    uint8_t       pdu;
    tAVRC_STS     status;
    uint8_t       opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t       scope;
} tAVRC_GET_NUM_OF_ITEMS_CMD;

typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
} tAVRC_CMD;

/* Continue and Abort */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (assigned by AVRC_BldCommand according to pdu) */
    uint8_t     target_pdu;
} tAVRC_NEXT_CMD;

typedef union
{
    uint8_t                     pdu;
    tAVRC_CMD                   cmd;
    tAVRC_GET_CAPS_CMD          get_caps;               /* GetCapability */
    tAVRC_CMD                   list_app_attr;          /* ListPlayerAppAttr */
    tAVRC_LIST_APP_VALUES_CMD   list_app_values;        /* ListPlayerAppValues */
    tAVRC_GET_CUR_APP_VALUE_CMD get_cur_app_val;        /* GetCurAppValue */
    tAVRC_SET_APP_VALUE_CMD     set_app_val;            /* SetAppValue */
    tAVRC_GET_APP_ATTR_TXT_CMD  get_app_attr_txt;       /* GetAppAttrTxt */
    tAVRC_GET_APP_VAL_TXT_CMD   get_app_val_txt;        /* GetAppValueTxt */
    tAVRC_INFORM_CHARSET_CMD    inform_charset;         /* InformCharset */
    tAVRC_BATTERY_STATUS_CMD    inform_battery_status;  /* InformBatteryStatus */
    tAVRC_GET_ELEM_ATTRS_CMD    get_elem_attrs;         /* GetElemAttrs */
    tAVRC_CMD                   get_play_status;        /* GetPlayStatus */
    tAVRC_REG_NOTIF_CMD         reg_notif;              /* RegNotify */
    tAVRC_NEXT_CMD              continu;                /* Continue */
    tAVRC_NEXT_CMD              abort;                  /* Abort */

    tAVRC_SET_ADDR_PLAYER_CMD   addr_player;            /* SetAddrPlayer */
    tAVRC_SET_VOLUME_CMD        volume;                 /* SetAbsVolume */
    tAVRC_SET_BR_PLAYER_CMD     br_player;              /* SetBrowsedPlayer */
    tAVRC_GET_ITEMS_CMD         get_items;              /* GetFolderItems */
    tAVRC_CHG_PATH_CMD          chg_path;               /* ChangePath */
    tAVRC_GET_ATTRS_CMD         get_attrs;              /* GetItemAttrs */
    tAVRC_SEARCH_CMD            search;                 /* Search */
    tAVRC_PLAY_ITEM_CMD         play_item;              /* PlayItem */
    tAVRC_ADD_TO_PLAY_CMD       add_to_play;            /* AddToNowPlaying */
    tAVRC_GET_NUM_OF_ITEMS_CMD  get_num_of_items;       /* GetTotalNumOfItems */
} tAVRC_COMMAND;

/* GetCapability */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     capability_id;
    uint8_t     count;
    tAVRC_CAPS_PARAM param;
} tAVRC_GET_CAPS_RSP;

/* ListPlayerAppAttr */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     num_attr;
    uint8_t     attrs[AVRC_MAX_APP_ATTR_SIZE];
} tAVRC_LIST_APP_ATTR_RSP;

/* ListPlayerAppValues */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     num_val;
    uint8_t     vals[AVRC_MAX_APP_ATTR_SIZE];
} tAVRC_LIST_APP_VALUES_RSP;

/* GetCurAppValue */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     num_val;
    tAVRC_APP_SETTING   *p_vals;
} tAVRC_GET_CUR_APP_VALUE_RSP;

/* GetAppAttrTxt */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     num_attr;
    tAVRC_APP_SETTING_TEXT   *p_attrs;
} tAVRC_GET_APP_ATTR_TXT_RSP;

/* GetElemAttrs */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     num_attr;
    tAVRC_ATTR_ENTRY   *p_attrs;
} tAVRC_GET_ELEM_ATTRS_RSP;

/* GetPlayStatus */
typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint32_t    song_len;
    uint32_t    song_pos;
    uint8_t     play_status;
} tAVRC_GET_PLAY_STATUS_RSP;

/* notification event parameter for AddressedPlayer change */
typedef struct
{
    uint16_t            player_id;
    uint16_t            uid_counter;
} tAVRC_ADDR_PLAYER_PARAM;

#ifndef AVRC_MAX_APP_SETTINGS
#define AVRC_MAX_APP_SETTINGS    8
#endif

/* notification event parameter for Player Application setting change */
typedef struct
{
    uint8_t             num_attr;
    uint8_t             attr_id[AVRC_MAX_APP_SETTINGS];
    uint8_t             attr_value[AVRC_MAX_APP_SETTINGS];
} tAVRC_PLAYER_APP_PARAM;

typedef union
{
    tAVRC_PLAYSTATE         play_status;
    tAVRC_UID               track;
    uint32_t                play_pos;
    tAVRC_BATTERY_STATUS    battery_status;
    tAVRC_SYSTEMSTATE       system_status;
    tAVRC_PLAYER_APP_PARAM  player_setting;
    tAVRC_ADDR_PLAYER_PARAM addr_player;
    uint16_t                uid_counter;
    uint8_t                 volume;
} tAVRC_NOTIF_RSP_PARAM;

/* RegNotify */
typedef struct
{
    uint8_t                 pdu;
    tAVRC_STS               status;
    uint8_t                 opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t                 event_id;
    tAVRC_NOTIF_RSP_PARAM   param;
} tAVRC_REG_NOTIF_RSP;

/* SetAbsVolume */
typedef struct
{
    uint8_t             pdu;
    tAVRC_STS           status;
    uint8_t             opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t             volume;
} tAVRC_SET_VOLUME_RSP;

/* SetBrowsedPlayer */
typedef struct
{
    uint8_t             pdu;
    tAVRC_STS           status;
    uint8_t             opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint16_t            uid_counter;
    uint32_t            num_items;
    uint16_t            charset_id;
    uint8_t             folder_depth;
    tAVRC_NAME          *p_folders;
} tAVRC_SET_BR_PLAYER_RSP;

/* GetFolderItems */
typedef struct
{
    uint8_t             pdu;
    tAVRC_STS           status;
    uint8_t             opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint16_t            uid_counter;
    uint16_t            item_count;
    tAVRC_ITEM          *p_item_list;
} tAVRC_GET_ITEMS_RSP;

/* ChangePath */
typedef struct
{
    uint8_t             pdu;
    tAVRC_STS           status;
    uint8_t             opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint32_t            num_items;
} tAVRC_CHG_PATH_RSP;

/* GetItemAttrs */
typedef struct
{
    uint8_t             pdu;
    tAVRC_STS           status;
    uint8_t             opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t             attr_count;
    tAVRC_ATTR_ENTRY    *p_attr_list;
} tAVRC_GET_ATTRS_RSP;

/* Get Total Number of Items */
typedef struct
{
    uint8_t               pdu;
    tAVRC_STS           status;
    uint8_t               opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint16_t              uid_counter;
    uint32_t              num_items;
} tAVRC_GET_NUM_OF_ITEMS_RSP;

/* Search */
typedef struct
{
    uint8_t             pdu;
    tAVRC_STS           status;
    uint8_t             opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint16_t            uid_counter;
    uint32_t            num_items;
} tAVRC_SEARCH_RSP;

typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
    uint8_t     target_pdu;
} tAVRC_NEXT_RSP;

typedef struct
{
    uint8_t     pdu;
    tAVRC_STS   status;
    uint8_t     opcode;         /* Op Code (copied from avrc_cmd.opcode by AVRC_BldResponse user. invalid one to generate according to pdu) */
} tAVRC_RSP;

typedef union
{
    uint8_t                         pdu;
    tAVRC_RSP                       rsp;
    tAVRC_GET_CAPS_RSP              get_caps;               /* GetCapability */
    tAVRC_LIST_APP_ATTR_RSP         list_app_attr;          /* ListPlayerAppAttr */
    tAVRC_LIST_APP_VALUES_RSP       list_app_values;        /* ListPlayerAppValues */
    tAVRC_GET_CUR_APP_VALUE_RSP     get_cur_app_val;        /* GetCurAppValue */
    tAVRC_RSP                       set_app_val;            /* SetAppValue */
    tAVRC_GET_APP_ATTR_TXT_RSP      get_app_attr_txt;       /* GetAppAttrTxt */
    tAVRC_GET_APP_ATTR_TXT_RSP      get_app_val_txt;        /* GetAppValueTxt */
    tAVRC_RSP                       inform_charset;         /* InformCharset */
    tAVRC_RSP                       inform_battery_status;  /* InformBatteryStatus */
    tAVRC_GET_ELEM_ATTRS_RSP        get_elem_attrs;         /* GetElemAttrs */
    tAVRC_GET_PLAY_STATUS_RSP       get_play_status;        /* GetPlayStatus */
    tAVRC_REG_NOTIF_RSP             reg_notif;              /* RegNotify */
    tAVRC_NEXT_RSP                  continu;                /* Continue */
    tAVRC_NEXT_RSP                  abort;                  /* Abort */

    tAVRC_RSP                       addr_player;            /* SetAddrPlayer */
    tAVRC_SET_VOLUME_RSP            volume;                 /* SetAbsVolume */
    tAVRC_SET_BR_PLAYER_RSP         br_player;              /* SetBrowsedPlayer */
    tAVRC_GET_ITEMS_RSP             get_items;              /* GetFolderItems */
    tAVRC_CHG_PATH_RSP              chg_path;               /* ChangePath */
    tAVRC_GET_ATTRS_RSP             get_attrs;              /* GetItemAttrs */
    tAVRC_GET_NUM_OF_ITEMS_RSP      get_num_of_items;       /* GetTotalNumberOfItems */
    tAVRC_SEARCH_RSP                search;                 /* Search */
    tAVRC_RSP                       play_item;              /* PlayItem */
    tAVRC_RSP                       add_to_play;            /* AddToNowPlaying */
} tAVRC_RESPONSE;

#endif