280 lines
11 KiB
C
280 lines
11 KiB
C
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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __BT_RC_H__
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#define __BT_RC_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include "bt_defs.h"
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/* Macros */
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#define BTRC_MAX_ATTR_STR_LEN 255
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#define BTRC_UID_SIZE 8
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#define BTRC_MAX_APP_SETTINGS 8
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#define BTRC_MAX_FOLDER_DEPTH 4
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#define BTRC_MAX_APP_ATTR_SIZE 16
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#define BTRC_MAX_ELEM_ATTR_SIZE 7
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typedef uint8_t btrc_uid_t[BTRC_UID_SIZE];
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typedef enum {
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BTRC_FEAT_NONE = 0x00, /* AVRCP 1.0 */
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BTRC_FEAT_METADATA = 0x01, /* AVRCP 1.3 */
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BTRC_FEAT_ABSOLUTE_VOLUME = 0x02, /* Supports TG role and volume sync */
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BTRC_FEAT_BROWSE = 0x04, /* AVRCP 1.4 and up, with Browsing support */
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} btrc_remote_features_t;
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typedef enum {
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BTRC_PLAYSTATE_STOPPED = 0x00, /* Stopped */
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BTRC_PLAYSTATE_PLAYING = 0x01, /* Playing */
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BTRC_PLAYSTATE_PAUSED = 0x02, /* Paused */
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BTRC_PLAYSTATE_FWD_SEEK = 0x03, /* Fwd Seek*/
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BTRC_PLAYSTATE_REV_SEEK = 0x04, /* Rev Seek*/
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BTRC_PLAYSTATE_ERROR = 0xFF, /* Error */
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} btrc_play_status_t;
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typedef enum {
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BTRC_EVT_PLAY_STATUS_CHANGED = 0x01,
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BTRC_EVT_TRACK_CHANGE = 0x02,
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BTRC_EVT_TRACK_REACHED_END = 0x03,
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BTRC_EVT_TRACK_REACHED_START = 0x04,
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BTRC_EVT_PLAY_POS_CHANGED = 0x05,
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BTRC_EVT_APP_SETTINGS_CHANGED = 0x08,
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} btrc_event_id_t;
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typedef enum {
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BTRC_NOTIFICATION_TYPE_INTERIM = 0,
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BTRC_NOTIFICATION_TYPE_CHANGED = 1,
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} btrc_notification_type_t;
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typedef enum {
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BTRC_PLAYER_ATTR_EQUALIZER = 0x01,
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BTRC_PLAYER_ATTR_REPEAT = 0x02,
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BTRC_PLAYER_ATTR_SHUFFLE = 0x03,
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BTRC_PLAYER_ATTR_SCAN = 0x04,
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} btrc_player_attr_t;
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typedef enum {
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BTRC_MEDIA_ATTR_TITLE = 0x01,
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BTRC_MEDIA_ATTR_ARTIST = 0x02,
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BTRC_MEDIA_ATTR_ALBUM = 0x03,
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BTRC_MEDIA_ATTR_TRACK_NUM = 0x04,
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BTRC_MEDIA_ATTR_NUM_TRACKS = 0x05,
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BTRC_MEDIA_ATTR_GENRE = 0x06,
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BTRC_MEDIA_ATTR_PLAYING_TIME = 0x07,
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} btrc_media_attr_t;
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typedef enum {
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BTRC_PLAYER_VAL_OFF_REPEAT = 0x01,
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BTRC_PLAYER_VAL_SINGLE_REPEAT = 0x02,
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BTRC_PLAYER_VAL_ALL_REPEAT = 0x03,
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BTRC_PLAYER_VAL_GROUP_REPEAT = 0x04
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} btrc_player_repeat_val_t;
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typedef enum {
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BTRC_PLAYER_VAL_OFF_SHUFFLE = 0x01,
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BTRC_PLAYER_VAL_ALL_SHUFFLE = 0x02,
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BTRC_PLAYER_VAL_GROUP_SHUFFLE = 0x03
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} btrc_player_shuffle_val_t;
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typedef enum {
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BTRC_STS_BAD_CMD = 0x00, /* Invalid command */
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BTRC_STS_BAD_PARAM = 0x01, /* Invalid parameter */
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BTRC_STS_NOT_FOUND = 0x02, /* Specified parameter is wrong or not found */
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BTRC_STS_INTERNAL_ERR = 0x03, /* Internal Error */
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BTRC_STS_NO_ERROR = 0x04 /* Operation Success */
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} btrc_status_t;
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typedef struct {
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uint8_t num_attr;
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uint8_t attr_ids[BTRC_MAX_APP_SETTINGS];
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uint8_t attr_values[BTRC_MAX_APP_SETTINGS];
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} btrc_player_settings_t;
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typedef union
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{
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btrc_play_status_t play_status;
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btrc_uid_t track; /* queue position in NowPlaying */
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uint32_t song_pos;
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btrc_player_settings_t player_setting;
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} btrc_register_notification_t;
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typedef struct {
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uint8_t id; /* can be attr_id or value_id */
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uint8_t text[BTRC_MAX_ATTR_STR_LEN];
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} btrc_player_setting_text_t;
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typedef struct {
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uint32_t attr_id;
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uint8_t text[BTRC_MAX_ATTR_STR_LEN];
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} btrc_element_attr_val_t;
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/** Callback for the controller's supported feautres */
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typedef void (* btrc_remote_features_callback)(bt_bdaddr_t *bd_addr,
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btrc_remote_features_t features);
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/** Callback for play status request */
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typedef void (* btrc_get_play_status_callback)();
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/** Callback for list player application attributes (Shuffle, Repeat,...) */
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typedef void (* btrc_list_player_app_attr_callback)();
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/** Callback for list player application attributes (Shuffle, Repeat,...) */
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typedef void (* btrc_list_player_app_values_callback)(btrc_player_attr_t attr_id);
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/** Callback for getting the current player application settings value
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** num_attr: specifies the number of attribute ids contained in p_attrs
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*/
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typedef void (* btrc_get_player_app_value_callback) (uint8_t num_attr, btrc_player_attr_t *p_attrs);
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/** Callback for getting the player application settings attributes' text
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** num_attr: specifies the number of attribute ids contained in p_attrs
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*/
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typedef void (* btrc_get_player_app_attrs_text_callback) (uint8_t num_attr, btrc_player_attr_t *p_attrs);
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/** Callback for getting the player application settings values' text
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** num_attr: specifies the number of value ids contained in p_vals
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*/
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typedef void (* btrc_get_player_app_values_text_callback) (uint8_t attr_id, uint8_t num_val, uint8_t *p_vals);
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/** Callback for setting the player application settings values */
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typedef void (* btrc_set_player_app_value_callback) (btrc_player_settings_t *p_vals);
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/** Callback to fetch the get element attributes of the current song
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** num_attr: specifies the number of attributes requested in p_attrs
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*/
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typedef void (* btrc_get_element_attr_callback) (uint8_t num_attr, btrc_media_attr_t *p_attrs);
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/** Callback for register notification (Play state change/track change/...)
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** param: Is only valid if event_id is BTRC_EVT_PLAY_POS_CHANGED
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*/
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typedef void (* btrc_register_notification_callback) (btrc_event_id_t event_id, uint32_t param);
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/* AVRCP 1.4 Enhancements */
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/** Callback for volume change on CT
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** volume: Current volume setting on the CT (0-127)
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*/
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typedef void (* btrc_volume_change_callback) (uint8_t volume, uint8_t ctype);
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/** Callback for passthrough commands */
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typedef void (* btrc_passthrough_cmd_callback) (int id, int key_state);
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/** BT-RC Target callback structure. */
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typedef struct {
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/** set to sizeof(BtRcCallbacks) */
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size_t size;
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btrc_remote_features_callback remote_features_cb;
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btrc_get_play_status_callback get_play_status_cb;
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btrc_list_player_app_attr_callback list_player_app_attr_cb;
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btrc_list_player_app_values_callback list_player_app_values_cb;
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btrc_get_player_app_value_callback get_player_app_value_cb;
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btrc_get_player_app_attrs_text_callback get_player_app_attrs_text_cb;
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btrc_get_player_app_values_text_callback get_player_app_values_text_cb;
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btrc_set_player_app_value_callback set_player_app_value_cb;
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btrc_get_element_attr_callback get_element_attr_cb;
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btrc_register_notification_callback register_notification_cb;
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btrc_volume_change_callback volume_change_cb;
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btrc_passthrough_cmd_callback passthrough_cmd_cb;
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} btrc_callbacks_t;
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/** Represents the standard BT-RC AVRCP Target interface. */
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typedef struct {
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/** set to sizeof(BtRcInterface) */
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size_t size;
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/**
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* Register the BtRc callbacks
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*/
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bt_status_t (*init)( btrc_callbacks_t* callbacks );
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/** Respose to GetPlayStatus request. Contains the current
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** 1. Play status
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** 2. Song duration/length
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** 3. Song position
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*/
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bt_status_t (*get_play_status_rsp)( btrc_play_status_t play_status, uint32_t song_len, uint32_t song_pos);
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/** Lists the support player application attributes (Shuffle/Repeat/...)
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** num_attr: Specifies the number of attributes contained in the pointer p_attrs
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*/
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bt_status_t (*list_player_app_attr_rsp)( int num_attr, btrc_player_attr_t *p_attrs);
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/** Lists the support player application attributes (Shuffle Off/On/Group)
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** num_val: Specifies the number of values contained in the pointer p_vals
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*/
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bt_status_t (*list_player_app_value_rsp)( int num_val, uint8_t *p_vals);
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/** Returns the current application attribute values for each of the specified attr_id */
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bt_status_t (*get_player_app_value_rsp)( btrc_player_settings_t *p_vals);
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/** Returns the application attributes text ("Shuffle"/"Repeat"/...)
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** num_attr: Specifies the number of attributes' text contained in the pointer p_attrs
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*/
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bt_status_t (*get_player_app_attr_text_rsp)( int num_attr, btrc_player_setting_text_t *p_attrs);
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/** Returns the application attributes text ("Shuffle"/"Repeat"/...)
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** num_attr: Specifies the number of attribute values' text contained in the pointer p_vals
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*/
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bt_status_t (*get_player_app_value_text_rsp)( int num_val, btrc_player_setting_text_t *p_vals);
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/** Returns the current songs' element attributes text ("Title"/"Album"/"Artist")
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** num_attr: Specifies the number of attributes' text contained in the pointer p_attrs
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*/
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bt_status_t (*get_element_attr_rsp)( uint8_t num_attr, btrc_element_attr_val_t *p_attrs);
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/** Response to set player attribute request ("Shuffle"/"Repeat")
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** rsp_status: Status of setting the player attributes for the current media player
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*/
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bt_status_t (*set_player_app_value_rsp)(btrc_status_t rsp_status);
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/* Response to the register notification request (Play state change/track change/...).
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** event_id: Refers to the event_id this notification change corresponds too
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** type: Response type - interim/changed
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** p_params: Based on the event_id, this parameter should be populated
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*/
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bt_status_t (*register_notification_rsp)(btrc_event_id_t event_id,
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btrc_notification_type_t type,
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btrc_register_notification_t *p_param);
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/* AVRCP 1.4 enhancements */
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/**Send current volume setting to remote side. Support limited to SetAbsoluteVolume
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** This can be enhanced to support Relative Volume (AVRCP 1.0).
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** With RelateVolume, we will send VOLUME_UP/VOLUME_DOWN opposed to absolute volume level
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** volume: Should be in the range 0-127. bit7 is reseved and cannot be set
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*/
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bt_status_t (*set_volume)(uint8_t volume);
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/** Closes the interface. */
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void (*cleanup)( void );
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} btrc_interface_t;
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typedef void (* btrc_passthrough_rsp_callback) (int id, int key_state);
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typedef void (* btrc_connection_state_callback) (bool state, bt_bdaddr_t *bd_addr);
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/** BT-RC Controller callback structure. */
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typedef struct {
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/** set to sizeof(BtRcCallbacks) */
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size_t size;
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btrc_passthrough_rsp_callback passthrough_rsp_cb;
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btrc_connection_state_callback connection_state_cb;
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} btrc_ctrl_callbacks_t;
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#endif /* __BT_RC_H__ */
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