// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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 __ESP_AVRC_API_H__
#define __ESP_AVRC_API_H__
#include <stdint.h>
#include <stdbool.h>
#include "esp_err.h"
#include "esp_bt_defs.h"
#ifdef __cplusplus
extern "C" {
#endif
/// AVRC feature bit mask
typedef enum {
ESP_AVRC_FEAT_RCTG = 0x0001, /*!< remote control target */
ESP_AVRC_FEAT_RCCT = 0x0002, /*!< remote control controller */
ESP_AVRC_FEAT_VENDOR = 0x0008, /*!< remote control vendor dependent commands */
ESP_AVRC_FEAT_BROWSE = 0x0010, /*!< use browsing channel */
ESP_AVRC_FEAT_META_DATA = 0x0040, /*!< remote control metadata transfer command/response */
ESP_AVRC_FEAT_ADV_CTRL = 0x0200, /*!< remote control advanced control commmand/response */
} esp_avrc_features_t;
/// AVRC passthrough command code
typedef enum {
ESP_AVRC_PT_CMD_PLAY = 0x44, /*!< play */
ESP_AVRC_PT_CMD_STOP = 0x45, /*!< stop */
ESP_AVRC_PT_CMD_PAUSE = 0x46, /*!< pause */
ESP_AVRC_PT_CMD_FORWARD = 0x4B, /*!< forward */
ESP_AVRC_PT_CMD_BACKWARD = 0x4C, /*!< backward */
ESP_AVRC_PT_CMD_REWIND = 0x48, /*!< rewind */
ESP_AVRC_PT_CMD_FAST_FORWARD = 0x49 /*!< fast forward */
} esp_avrc_pt_cmd_t;
/// AVRC passthrough command state
typedef enum {
ESP_AVRC_PT_CMD_STATE_PRESSED = 0, /*!< key pressed */
ESP_AVRC_PT_CMD_STATE_RELEASED = 1 /*!< key released */
} esp_avrc_pt_cmd_state_t;
/// AVRC Controller callback events
typedef enum {
ESP_AVRC_CT_CONNECTION_STATE_EVT = 0, /*!< connection state changed event */
ESP_AVRC_CT_PASSTHROUGH_RSP_EVT = 1, /*!< passthrough response event */
ESP_AVRC_CT_METADATA_RSP_EVT = 2, /*!< metadata response event */
ESP_AVRC_CT_PLAY_STATUS_RSP_EVT = 3, /*!< play status response event */
ESP_AVRC_CT_CHANGE_NOTIFY_EVT = 4, /*!< notification event */
ESP_AVRC_CT_REMOTE_FEATURES_EVT = 5, /*!< feature of remote device indication event */
} esp_avrc_ct_cb_event_t;
/// AVRC metadata attribute mask
typedef enum {
ESP_AVRC_MD_ATTR_TITLE = 0x1, /*!< title of the playing track */
ESP_AVRC_MD_ATTR_ARTIST = 0x2, /*!< track artist */
ESP_AVRC_MD_ATTR_ALBUM = 0x4, /*!< album name */
ESP_AVRC_MD_ATTR_TRACK_NUM = 0x8, /*!< track position on the album */
ESP_AVRC_MD_ATTR_NUM_TRACKS = 0x10, /*!< number of tracks on the album */
ESP_AVRC_MD_ATTR_GENRE = 0x20, /*!< track genre */
ESP_AVRC_MD_ATTR_PLAYING_TIME = 0x40 /*!< total album playing time in miliseconds */
} esp_avrc_md_attr_mask_t;
/// AVRC event notification ids
typedef enum {
ESP_AVRC_RN_PLAY_STATUS_CHANGE = 0x01, /*!< track status change, eg. from playing to paused */
ESP_AVRC_RN_TRACK_CHANGE = 0x02, /*!< new track is loaded */
ESP_AVRC_RN_TRACK_REACHED_END = 0x03, /*!< current track reached end */
ESP_AVRC_RN_TRACK_REACHED_START = 0x04, /*!< current track reached start position */
ESP_AVRC_RN_PLAY_POS_CHANGED = 0x05, /*!< track playing position changed */
ESP_AVRC_RN_BATTERY_STATUS_CHANGE = 0x06, /*!< battery status changed */
ESP_AVRC_RN_SYSTEM_STATUS_CHANGE = 0x07, /*!< system status changed */
ESP_AVRC_RN_APP_SETTING_CHANGE = 0x08, /*!< application settings changed */
ESP_AVRC_RN_MAX_EVT
} esp_avrc_rn_event_ids_t;
/// AVRC player setting ids
typedef enum {
ESP_AVRC_PS_EQUALIZER = 0x01, /*!< equalizer, on or off */
ESP_AVRC_PS_REPEAT_MODE = 0x02, /*!< repeat mode */
ESP_AVRC_PS_SHUFFLE_MODE = 0x03, /*!< shuffle mode */
ESP_AVRC_PS_SCAN_MODE = 0x04, /*!< scan mode on or off */
ESP_AVRC_PS_MAX_ATTR
} esp_avrc_ps_attr_ids_t;
/// AVRC equalizer modes
typedef enum {
ESP_AVRC_PS_EQUALIZER_OFF = 0x1, /*!< equalizer OFF */
ESP_AVRC_PS_EQUALIZER_ON = 0x2 /*!< equalizer ON */
} esp_avrc_ps_eq_value_ids_t;
/// AVRC repeat modes
typedef enum {
ESP_AVRC_PS_REPEAT_OFF = 0x1, /*!< repeat mode off */
ESP_AVRC_PS_REPEAT_SINGLE = 0x2, /*!< single track repeat */
ESP_AVRC_PS_REPEAT_GROUP = 0x3 /*!< group repeat */
} esp_avrc_ps_rpt_value_ids_t;
/// AVRC shuffle modes
typedef enum {
ESP_AVRC_PS_SHUFFLE_OFF = 0x1, /*<! shuffle off */
ESP_AVRC_PS_SHUFFLE_ALL = 0x2, /*<! shuffle all tracks */
ESP_AVRC_PS_SHUFFLE_GROUP = 0x3 /*<! group shuffle */
} esp_avrc_ps_shf_value_ids_t;
/// AVRC scan modes
typedef enum {
ESP_AVRC_PS_SCAN_OFF = 0x1, /*!< scan off */
ESP_AVRC_PS_SCAN_ALL = 0x2, /*!< all tracks scan */
ESP_AVRC_PS_SCAN_GROUP = 0x3 /*!< group scan */
} esp_avrc_ps_scn_value_ids_t;
/// AVRC controller callback parameters
typedef union {
/**
* @brief ESP_AVRC_CT_CONNECTION_STATE_EVT
*/
struct avrc_ct_conn_stat_param {
bool connected; /*!< whether AVRC connection is set up */
esp_bd_addr_t remote_bda; /*!< remote bluetooth device address */
} conn_stat; /*!< AVRC connection status */
/**
* @brief ESP_AVRC_CT_PASSTHROUGH_RSP_EVT
*/
struct avrc_ct_psth_rsp_param {
uint8_t tl; /*!< transaction label, 0 to 15 */
uint8_t key_code; /*!< passthrough command code */
uint8_t key_state; /*!< 0 for PRESSED, 1 for RELEASED */
} psth_rsp; /*!< passthrough command response */
/**
* @brief ESP_AVRC_CT_METADATA_RSP_EVT
*/
struct avrc_ct_meta_rsp_param {
uint8_t attr_id; /*!< id of metadata attribute */
uint8_t *attr_text; /*!< attribute itself */
int attr_length; /*!< attribute character length */
} meta_rsp; /*!< metadata attributes response */
/**
* @brief ESP_AVRC_CT_CHANGE_NOTIFY_EVT
*/
struct avrc_ct_change_notify_param {
uint8_t event_id; /*!< id of AVRC event notification */
uint32_t event_parameter; /*!< event notification parameter */
} change_ntf; /*!< notifications */
/**
* @brief ESP_AVRC_CT_REMOTE_FEATURES_EVT
*/
struct avrc_ct_rmt_feats_param {
uint32_t feat_mask; /*!< AVRC feature mask of remote device */
esp_bd_addr_t remote_bda; /*!< remote bluetooth device address */
} rmt_feats; /*!< AVRC features discovered from remote SDP server */
} esp_avrc_ct_cb_param_t;
/**
* @brief AVRCP controller callback function type
* @param event : Event type
* @param param : Pointer to callback parameter union
*/
typedef void (* esp_avrc_ct_cb_t)(esp_avrc_ct_cb_event_t event, esp_avrc_ct_cb_param_t *param);
/**
* @brief Register application callbacks to AVRCP module; for now only AVRCP Controller
* role is supported. This function should be called after esp_bluedroid_enable()
* completes successfully
*
* @param[in] callback: AVRCP controller callback function
*
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*
*/
esp_err_t esp_avrc_ct_register_callback(esp_avrc_ct_cb_t callback);
/**
*
* @brief Initialize the bluetooth AVRCP controller module, This function should be called
* after esp_bluedroid_enable() completes successfully
*
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*
*/
esp_err_t esp_avrc_ct_init(void);
/**
*
* @brief De-initialize AVRCP controller module. This function should be called after
* after esp_bluedroid_enable() completes successfully
*
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*/
esp_err_t esp_avrc_ct_deinit(void);
/**
*
* @brief Send player application settings command to AVRCP target. This function should be called
* after ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established.
*
* @param[in] tl : transaction label, 0 to 15, consecutive commands should use different values.
* @param[in] attr_id : player application setting attribute IDs from one of esp_avrc_ps_attr_ids_t
* @param[in] value_id : attribute value defined for the specific player application setting attribute
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*/
esp_err_t esp_avrc_ct_send_set_player_value_cmd(uint8_t tl, uint8_t attr_id, uint8_t value_id);
/**
* @brief Send register notification command to AVRCP target, This function should be called after
* ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established
*
* @param[in] tl : transaction label, 0 to 15, consecutive commands should use different values.
* @param[in] event_id : id of events, e.g. ESP_AVRC_RN_PLAY_STATUS_CHANGE, ESP_AVRC_RN_TRACK_CHANGE, etc.
* @param[in] event_parameter : special parameters, eg. playback interval for ESP_AVRC_RN_PLAY_POS_CHANGED
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*/
esp_err_t esp_avrc_ct_send_register_notification_cmd(uint8_t tl, uint8_t event_id, uint32_t event_parameter);
/**
* @brief Send metadata command to AVRCP target, This function should be called after
* ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established
*
* @param[in] tl : transaction label, 0 to 15, consecutive commands should use different values.
* @param[in] attr_mask : mask of attributes, e.g. ESP_AVRC_MD_ATTR_ID_TITLE | ESP_AVRC_MD_ATTR_ID_ARTIST.
*
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*/
esp_err_t esp_avrc_ct_send_metadata_cmd(uint8_t tl, uint8_t attr_mask);
/**
* @brief Send passthrough command to AVRCP target, This function should be called after
* ESP_AVRC_CT_CONNECTION_STATE_EVT is received and AVRCP connection is established
*
* @param[in] tl : transaction label, 0 to 15, consecutive commands should use different values.
* @param[in] key_code : passthrough command code, e.g. ESP_AVRC_PT_CMD_PLAY, ESP_AVRC_PT_CMD_STOP, etc.
* @param[in] key_state : passthrough command key state, ESP_AVRC_PT_CMD_STATE_PRESSED or
* ESP_AVRC_PT_CMD_STATE_RELEASED
*
* @return
* - ESP_OK: success
* - ESP_INVALID_STATE: if bluetooth stack is not yet enabled
* - ESP_FAIL: others
*/
esp_err_t esp_avrc_ct_send_passthrough_cmd(uint8_t tl, uint8_t key_code, uint8_t key_state);
#ifdef __cplusplus
}
#endif
#endif /* __ESP_AVRC_API_H__ */