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platform_hardware_libhardware/include/hardware/bt_rc.h
AnubhavGupta eacdbc8b6d Bluetooth: A2DP sink interface for Audio Focus change and AVRCP 1.3 
- Add interface to report audio focus change from Bluetooth Apk
   to media task for A2DP Sink scenarios.
 - Add interface to request audiofocus from system/bt.
 - Add interfaces for AVRCP 1.3.

Change-Id: I687ea7be460b3ee3b082db9264621e2e24d04c0c
2016-01-19 14:30:45 -08:00

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.
*/
#ifndef ANDROID_INCLUDE_BT_RC_H
#define ANDROID_INCLUDE_BT_RC_H
__BEGIN_DECLS
/* Macros */
#define BTRC_MAX_ATTR_STR_LEN 255
#define BTRC_UID_SIZE 8
#define BTRC_MAX_APP_SETTINGS 8
#define BTRC_MAX_FOLDER_DEPTH 4
#define BTRC_MAX_APP_ATTR_SIZE 16
#define BTRC_MAX_ELEM_ATTR_SIZE 7
typedef uint8_t btrc_uid_t[BTRC_UID_SIZE];
typedef enum {
BTRC_FEAT_NONE = 0x00, /* AVRCP 1.0 */
BTRC_FEAT_METADATA = 0x01, /* AVRCP 1.3 */
BTRC_FEAT_ABSOLUTE_VOLUME = 0x02, /* Supports TG role and volume sync */
BTRC_FEAT_BROWSE = 0x04, /* AVRCP 1.4 and up, with Browsing support */
} btrc_remote_features_t;
typedef enum {
BTRC_PLAYSTATE_STOPPED = 0x00, /* Stopped */
BTRC_PLAYSTATE_PLAYING = 0x01, /* Playing */
BTRC_PLAYSTATE_PAUSED = 0x02, /* Paused */
BTRC_PLAYSTATE_FWD_SEEK = 0x03, /* Fwd Seek*/
BTRC_PLAYSTATE_REV_SEEK = 0x04, /* Rev Seek*/
BTRC_PLAYSTATE_ERROR = 0xFF, /* Error */
} btrc_play_status_t;
typedef enum {
BTRC_EVT_PLAY_STATUS_CHANGED = 0x01,
BTRC_EVT_TRACK_CHANGE = 0x02,
BTRC_EVT_TRACK_REACHED_END = 0x03,
BTRC_EVT_TRACK_REACHED_START = 0x04,
BTRC_EVT_PLAY_POS_CHANGED = 0x05,
BTRC_EVT_APP_SETTINGS_CHANGED = 0x08,
} btrc_event_id_t;
typedef enum {
BTRC_NOTIFICATION_TYPE_INTERIM = 0,
BTRC_NOTIFICATION_TYPE_CHANGED = 1,
} btrc_notification_type_t;
typedef enum {
BTRC_PLAYER_ATTR_EQUALIZER = 0x01,
BTRC_PLAYER_ATTR_REPEAT = 0x02,
BTRC_PLAYER_ATTR_SHUFFLE = 0x03,
BTRC_PLAYER_ATTR_SCAN = 0x04,
} btrc_player_attr_t;
typedef enum {
BTRC_MEDIA_ATTR_TITLE = 0x01,
BTRC_MEDIA_ATTR_ARTIST = 0x02,
BTRC_MEDIA_ATTR_ALBUM = 0x03,
BTRC_MEDIA_ATTR_TRACK_NUM = 0x04,
BTRC_MEDIA_ATTR_NUM_TRACKS = 0x05,
BTRC_MEDIA_ATTR_GENRE = 0x06,
BTRC_MEDIA_ATTR_PLAYING_TIME = 0x07,
} btrc_media_attr_t;
typedef enum {
BTRC_PLAYER_VAL_OFF_REPEAT = 0x01,
BTRC_PLAYER_VAL_SINGLE_REPEAT = 0x02,
BTRC_PLAYER_VAL_ALL_REPEAT = 0x03,
BTRC_PLAYER_VAL_GROUP_REPEAT = 0x04
} btrc_player_repeat_val_t;
typedef enum {
BTRC_PLAYER_VAL_OFF_SHUFFLE = 0x01,
BTRC_PLAYER_VAL_ALL_SHUFFLE = 0x02,
BTRC_PLAYER_VAL_GROUP_SHUFFLE = 0x03
} btrc_player_shuffle_val_t;
typedef enum {
BTRC_STS_BAD_CMD = 0x00, /* Invalid command */
BTRC_STS_BAD_PARAM = 0x01, /* Invalid parameter */
BTRC_STS_NOT_FOUND = 0x02, /* Specified parameter is wrong or not found */
BTRC_STS_INTERNAL_ERR = 0x03, /* Internal Error */
BTRC_STS_NO_ERROR = 0x04 /* Operation Success */
} btrc_status_t;
typedef struct {
uint8_t num_attr;
uint8_t attr_ids[BTRC_MAX_APP_SETTINGS];
uint8_t attr_values[BTRC_MAX_APP_SETTINGS];
} btrc_player_settings_t;
typedef struct {
uint8_t val;
uint16_t charset_id;
uint16_t str_len;
uint8_t *p_str;
} btrc_player_app_ext_attr_val_t;
typedef struct {
uint8_t attr_id;
uint16_t charset_id;
uint16_t str_len;
uint8_t *p_str;
uint8_t num_val;
btrc_player_app_ext_attr_val_t ext_attr_val[BTRC_MAX_APP_ATTR_SIZE];
} btrc_player_app_ext_attr_t;
typedef struct {
uint8_t attr_id;
uint8_t num_val;
uint8_t attr_val[BTRC_MAX_APP_ATTR_SIZE];
} btrc_player_app_attr_t;
typedef struct {
uint32_t start_item;
uint32_t end_item;
uint32_t size;
uint32_t attrs[BTRC_MAX_ELEM_ATTR_SIZE];
uint8_t attr_count;
} btrc_getfolderitem_t;
typedef union
{
btrc_play_status_t play_status;
btrc_uid_t track; /* queue position in NowPlaying */
uint32_t song_pos;
btrc_player_settings_t player_setting;
} btrc_register_notification_t;
typedef struct {
uint8_t id; /* can be attr_id or value_id */
uint8_t text[BTRC_MAX_ATTR_STR_LEN];
} btrc_player_setting_text_t;
typedef struct {
uint32_t attr_id;
uint8_t text[BTRC_MAX_ATTR_STR_LEN];
} btrc_element_attr_val_t;
/** Callback for the controller's supported feautres */
typedef void (* btrc_remote_features_callback)(bt_bdaddr_t *bd_addr,
btrc_remote_features_t features);
/** Callback for play status request */
typedef void (* btrc_get_play_status_callback)();
/** Callback for list player application attributes (Shuffle, Repeat,...) */
typedef void (* btrc_list_player_app_attr_callback)();
/** Callback for list player application attributes (Shuffle, Repeat,...) */
typedef void (* btrc_list_player_app_values_callback)(btrc_player_attr_t attr_id);
/** Callback for getting the current player application settings value
** num_attr: specifies the number of attribute ids contained in p_attrs
*/
typedef void (* btrc_get_player_app_value_callback) (uint8_t num_attr, btrc_player_attr_t *p_attrs);
/** Callback for getting the player application settings attributes' text
** num_attr: specifies the number of attribute ids contained in p_attrs
*/
typedef void (* btrc_get_player_app_attrs_text_callback) (uint8_t num_attr, btrc_player_attr_t *p_attrs);
/** Callback for getting the player application settings values' text
** num_attr: specifies the number of value ids contained in p_vals
*/
typedef void (* btrc_get_player_app_values_text_callback) (uint8_t attr_id, uint8_t num_val, uint8_t *p_vals);
/** Callback for setting the player application settings values */
typedef void (* btrc_set_player_app_value_callback) (btrc_player_settings_t *p_vals);
/** Callback to fetch the get element attributes of the current song
** num_attr: specifies the number of attributes requested in p_attrs
*/
typedef void (* btrc_get_element_attr_callback) (uint8_t num_attr, btrc_media_attr_t *p_attrs);
/** Callback for register notification (Play state change/track change/...)
** param: Is only valid if event_id is BTRC_EVT_PLAY_POS_CHANGED
*/
typedef void (* btrc_register_notification_callback) (btrc_event_id_t event_id, uint32_t param);
/* AVRCP 1.4 Enhancements */
/** Callback for volume change on CT
** volume: Current volume setting on the CT (0-127)
*/
typedef void (* btrc_volume_change_callback) (uint8_t volume, uint8_t ctype);
/** Callback for passthrough commands */
typedef void (* btrc_passthrough_cmd_callback) (int id, int key_state);
/** BT-RC Target callback structure. */
typedef struct {
/** set to sizeof(BtRcCallbacks) */
size_t size;
btrc_remote_features_callback remote_features_cb;
btrc_get_play_status_callback get_play_status_cb;
btrc_list_player_app_attr_callback list_player_app_attr_cb;
btrc_list_player_app_values_callback list_player_app_values_cb;
btrc_get_player_app_value_callback get_player_app_value_cb;
btrc_get_player_app_attrs_text_callback get_player_app_attrs_text_cb;
btrc_get_player_app_values_text_callback get_player_app_values_text_cb;
btrc_set_player_app_value_callback set_player_app_value_cb;
btrc_get_element_attr_callback get_element_attr_cb;
btrc_register_notification_callback register_notification_cb;
btrc_volume_change_callback volume_change_cb;
btrc_passthrough_cmd_callback passthrough_cmd_cb;
} btrc_callbacks_t;
/** Represents the standard BT-RC AVRCP Target interface. */
typedef struct {
/** set to sizeof(BtRcInterface) */
size_t size;
/**
* Register the BtRc callbacks
*/
bt_status_t (*init)( btrc_callbacks_t* callbacks );
/** Respose to GetPlayStatus request. Contains the current
** 1. Play status
** 2. Song duration/length
** 3. Song position
*/
bt_status_t (*get_play_status_rsp)( btrc_play_status_t play_status, uint32_t song_len, uint32_t song_pos);
/** Lists the support player application attributes (Shuffle/Repeat/...)
** num_attr: Specifies the number of attributes contained in the pointer p_attrs
*/
bt_status_t (*list_player_app_attr_rsp)( int num_attr, btrc_player_attr_t *p_attrs);
/** Lists the support player application attributes (Shuffle Off/On/Group)
** num_val: Specifies the number of values contained in the pointer p_vals
*/
bt_status_t (*list_player_app_value_rsp)( int num_val, uint8_t *p_vals);
/** Returns the current application attribute values for each of the specified attr_id */
bt_status_t (*get_player_app_value_rsp)( btrc_player_settings_t *p_vals);
/** Returns the application attributes text ("Shuffle"/"Repeat"/...)
** num_attr: Specifies the number of attributes' text contained in the pointer p_attrs
*/
bt_status_t (*get_player_app_attr_text_rsp)( int num_attr, btrc_player_setting_text_t *p_attrs);
/** Returns the application attributes text ("Shuffle"/"Repeat"/...)
** num_attr: Specifies the number of attribute values' text contained in the pointer p_vals
*/
bt_status_t (*get_player_app_value_text_rsp)( int num_val, btrc_player_setting_text_t *p_vals);
/** Returns the current songs' element attributes text ("Title"/"Album"/"Artist")
** num_attr: Specifies the number of attributes' text contained in the pointer p_attrs
*/
bt_status_t (*get_element_attr_rsp)( uint8_t num_attr, btrc_element_attr_val_t *p_attrs);
/** Response to set player attribute request ("Shuffle"/"Repeat")
** rsp_status: Status of setting the player attributes for the current media player
*/
bt_status_t (*set_player_app_value_rsp)(btrc_status_t rsp_status);
/* Response to the register notification request (Play state change/track change/...).
** event_id: Refers to the event_id this notification change corresponds too
** type: Response type - interim/changed
** p_params: Based on the event_id, this parameter should be populated
*/
bt_status_t (*register_notification_rsp)(btrc_event_id_t event_id,
btrc_notification_type_t type,
btrc_register_notification_t *p_param);
/* AVRCP 1.4 enhancements */
/**Send current volume setting to remote side. Support limited to SetAbsoluteVolume
** This can be enhanced to support Relative Volume (AVRCP 1.0).
** With RelateVolume, we will send VOLUME_UP/VOLUME_DOWN opposed to absolute volume level
** volume: Should be in the range 0-127. bit7 is reseved and cannot be set
*/
bt_status_t (*set_volume)(uint8_t volume);
/** Closes the interface. */
void (*cleanup)( void );
} btrc_interface_t;
typedef void (* btrc_passthrough_rsp_callback) (int id, int key_state);
typedef void (* btrc_groupnavigation_rsp_callback) (int id, int key_state);
typedef void (* btrc_connection_state_callback) (bool state, bt_bdaddr_t *bd_addr);
typedef void (* btrc_ctrl_getrcfeatures_callback) (bt_bdaddr_t *bd_addr, int features);
typedef void (* btrc_ctrl_setabsvol_cmd_callback) (bt_bdaddr_t *bd_addr, uint8_t abs_vol, uint8_t label);
typedef void (* btrc_ctrl_registernotification_abs_vol_callback) (bt_bdaddr_t *bd_addr, uint8_t label);
typedef void (* btrc_ctrl_setplayerapplicationsetting_rsp_callback) (bt_bdaddr_t *bd_addr,
uint8_t accepted);
typedef void (* btrc_ctrl_playerapplicationsetting_callback)(bt_bdaddr_t *bd_addr,
uint8_t num_attr,
btrc_player_app_attr_t *app_attrs,
uint8_t num_ext_attr,
btrc_player_app_ext_attr_t *ext_attrs);
typedef void (* btrc_ctrl_playerapplicationsetting_changed_callback)(bt_bdaddr_t *bd_addr,
btrc_player_settings_t *p_vals);
typedef void (* btrc_ctrl_track_changed_callback)(bt_bdaddr_t *bd_addr, uint8_t num_attr,
btrc_element_attr_val_t *p_attrs);
typedef void (* btrc_ctrl_play_position_changed_callback)(bt_bdaddr_t *bd_addr,
uint32_t song_len, uint32_t song_pos);
typedef void (* btrc_ctrl_play_status_changed_callback)(bt_bdaddr_t *bd_addr,
btrc_play_status_t play_status);
/** BT-RC Controller callback structure. */
typedef struct {
/** set to sizeof(BtRcCallbacks) */
size_t size;
btrc_passthrough_rsp_callback passthrough_rsp_cb;
btrc_groupnavigation_rsp_callback groupnavigation_rsp_cb;
btrc_connection_state_callback connection_state_cb;
btrc_ctrl_getrcfeatures_callback getrcfeatures_cb;
btrc_ctrl_setplayerapplicationsetting_rsp_callback setplayerappsetting_rsp_cb;
btrc_ctrl_playerapplicationsetting_callback playerapplicationsetting_cb;
btrc_ctrl_playerapplicationsetting_changed_callback playerapplicationsetting_changed_cb;
btrc_ctrl_setabsvol_cmd_callback setabsvol_cmd_cb;
btrc_ctrl_registernotification_abs_vol_callback registernotification_absvol_cb;
btrc_ctrl_track_changed_callback track_changed_cb;
btrc_ctrl_play_position_changed_callback play_position_changed_cb;
btrc_ctrl_play_status_changed_callback play_status_changed_cb;
} btrc_ctrl_callbacks_t;
/** Represents the standard BT-RC AVRCP Controller interface. */
typedef struct {
/** set to sizeof(BtRcInterface) */
size_t size;
/**
* Register the BtRc callbacks
*/
bt_status_t (*init)( btrc_ctrl_callbacks_t* callbacks );
/** send pass through command to target */
bt_status_t (*send_pass_through_cmd) (bt_bdaddr_t *bd_addr, uint8_t key_code,
uint8_t key_state );
/** send group navigation command to target */
bt_status_t (*send_group_navigation_cmd) (bt_bdaddr_t *bd_addr, uint8_t key_code,
uint8_t key_state );
/** send command to set player applicaiton setting attributes to target */
bt_status_t (*set_player_app_setting_cmd) (bt_bdaddr_t *bd_addr, uint8_t num_attrib,
uint8_t* attrib_ids, uint8_t* attrib_vals);
/** send rsp to set_abs_vol received from target */
bt_status_t (*set_volume_rsp) (bt_bdaddr_t *bd_addr, uint8_t abs_vol, uint8_t label);
/** send notificaiton rsp for abs vol to target */
bt_status_t (*register_abs_vol_rsp) (bt_bdaddr_t *bd_addr, btrc_notification_type_t rsp_type,
uint8_t abs_vol, uint8_t label);
/** Closes the interface. */
void (*cleanup)( void );
} btrc_ctrl_interface_t;
__END_DECLS
#endif /* ANDROID_INCLUDE_BT_RC_H */
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