AVRCP Browsing Controller API

avrcp_browsing_controller.h

typedef enum {
    AVRCP_BROWSING_MEDIA_PLAYER_ITEM = 0x01,
    AVRCP_BROWSING_FOLDER_ITEM,
    AVRCP_BROWSING_MEDIA_ELEMENT_ITEM,
    AVRCP_BROWSING_MEDIA_ROOT_FOLDER,
    AVRCP_BROWSING_MEDIA_ELEMENT_ITEM_ATTRIBUTE
} avrcp_browsing_item_type_t;

typedef enum {
    AVRCP_BROWSING_MEDIA_PLAYER_MAJOR_TYPE_AUDIO = 1,
    AVRCP_BROWSING_MEDIA_PLAYER_MAJOR_TYPE_VIDEO = 2,
    AVRCP_BROWSING_MEDIA_PLAYER_MAJOR_TYPE_BROADCASTING_AUDIO = 4,
    AVRCP_BROWSING_MEDIA_PLAYER_MAJOR_TYPE_BROADCASTING_VIDEO = 8
} avrcp_browsing_media_player_major_type_t;

typedef enum {
    AVRCP_BROWSING_MEDIA_PLAYER_SUBTYPE_AUDIO_BOOK = 1,
    AVRCP_BROWSING_MEDIA_PLAYER_SUBTYPE_POADCAST   = 2
} avrcp_browsing_media_player_subtype_t;

typedef enum {
    AVRCP_BROWSING_MEDIA_PLAYER_STATUS_STOPPED = 0,
    AVRCP_BROWSING_MEDIA_PLAYER_STATUS_PLAYING,
    AVRCP_BROWSING_MEDIA_PLAYER_STATUS_PAUSED,
    AVRCP_BROWSING_MEDIA_PLAYER_STATUS_FWD_SEEK,
    AVRCP_BROWSING_MEDIA_PLAYER_STATUS_REV_SEEK,
    AVRCP_BROWSING_MEDIA_PLAYER_STATUS_ERROR = 0xFF
} avrcp_browsing_media_player_status_t;

typedef enum {
    AVRCP_BROWSING_FOLDER_TYPE_MIXED = 0x00,
    AVRCP_BROWSING_FOLDER_TYPE_TITLES,
    AVRCP_BROWSING_FOLDER_TYPE_ALBUMS,
    AVRCP_BROWSING_FOLDER_TYPE_ARTISTS,
    AVRCP_BROWSING_FOLDER_TYPE_GENRES,
    AVRCP_BROWSING_FOLDER_TYPE_PLAYLISTS,
    AVRCP_BROWSING_FOLDER_TYPE_YEARS
} avrcp_browsing_folder_type_t;

typedef enum {
    AVRCP_BROWSING_MEDIA_TYPE_AUDIO = 0x00,
    AVRCP_BROWSING_MEDIA_TYPE_VIDEO
} avrcp_browsing_media_type_t;

/**
 * @brief Set up AVRCP Browsing Controller device.
 */
void avrcp_browsing_controller_init(void);

/**
 * @brief Register callback for the AVRCP Browsing Controller client. 
 * @param callback
 */
void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback);

/**
 * @brief Retrieve a list of media players.
 * @param avrcp_browsing_cid
 * @param start_item
 * @param end_item
 * @param attr_bitmap Use AVRCP_MEDIA_ATTR_ALL for all, and AVRCP_MEDIA_ATTR_NONE for none. Otherwise, see avrcp_media_attribute_id_t for the bitmap position of attrs. 
 **/
uint8_t avrcp_browsing_controller_get_media_players(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap);

/**
 * @brief Retrieve a list of folders and media items of the browsed player.
 * @param avrcp_browsing_cid
 * @param start_item
 * @param end_item
 * @param attr_bitmap Use AVRCP_MEDIA_ATTR_ALL for all, and AVRCP_MEDIA_ATTR_NONE for none. Otherwise, see avrcp_media_attribute_id_t for the bitmap position of attrs. 
 **/
uint8_t avrcp_browsing_controller_browse_file_system(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap);

/**
 * @brief Retrieve a list of media items of the browsed player.
 * @param avrcp_browsing_cid
 * @param start_item
 * @param end_item
 * @param attr_bitmap Use AVRCP_MEDIA_ATTR_ALL for all, and AVRCP_MEDIA_ATTR_NONE for none. Otherwise, see avrcp_media_attribute_id_t for the bitmap position of attrs. 
 **/
uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap);

/**
 * @brief Retrieve a list of folders and media items of the addressed player.
 * @param avrcp_browsing_cid
 * @param start_item
 * @param end_item
 * @param attr_bitmap Use AVRCP_MEDIA_ATTR_ALL for all, and AVRCP_MEDIA_ATTR_NONE for none. Otherwise, see avrcp_media_attribute_id_t for the bitmap position of attrs. 
 **/
uint8_t avrcp_browsing_controller_browse_now_playing_list(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap);

/** 
 * @brief Set browsed player. Calling this command is required prior to browsing the player's file system. Some players may support browsing only when set as the Addressed Player.
 * @param avrcp_browsing_cid
 * @param browsed_player_id
 */
uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id);

/** 
 * @brief Get total num attributes
 * @param avrcp_browsing_cid
 * @param scope 
 */
uint8_t avrcp_browsing_controller_get_total_nr_items_for_scope(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope);

/**
 * @brief Navigate one level up or down in thhe virtual filesystem. Requires that s browsed player is set.
 * @param avrcp_browsing_cid
 * @param direction     0-folder up, 1-folder down    
 * @param folder_uid    8 bytes long
 **/
uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid);
uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid);
uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid);


/**
 * @brief Retrives metadata information (title, artist, album, ...) about a media element with given uid. 
 * @param avrcp_browsing_cid
 * @param uid            media element uid 
 * @param uid_counter    Used to detect change to the media database on target device. A TG device that supports the UID Counter shall update the value of the counter on each change to the media database.
 * @param attr_bitmap    0x00000000 - retrieve all, chek avrcp_media_attribute_id_t in avrcp.h for detailed bit position description.
 * @param scope          check avrcp_browsing_scope_t in avrcp.h
 **/
uint8_t avrcp_browsing_controller_get_item_attributes_for_scope(uint16_t avrcp_browsing_cid, uint8_t * uid, uint16_t uid_counter, uint32_t attr_bitmap, avrcp_browsing_scope_t scope);

/**
 * @brief Searches are performed from the current folder in the Browsed Players virtual filesystem. The search applies to the current folder and all folders below that.
 * @param avrcp_browsing_cid
 * @param search_str_len
 * @param search_str
 * @return status 
 **/
uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str);

/**
 * @brief De-Init AVRCP Browsing Controller
 */
void avrcp_browsing_controller_deinit(void);