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zephyr/subsys/bluetooth/audio/mcc_internal.h
Emil Gydesen ec41dd9ba6 Bluetooth: Audio: Use BT_GATT_SUBSCRIBE_FLAG_VOLATILE 
The LE Audio implementations do not really support bonding yet,
and removing subs on disconnect is the most effective (and correct)
way of ensuring that we do not subscribe more than once when we
re-discover after reconnection.

The broadcast assistant and the media control client does not
support multiple connections as of this commit, so they needed
special treatment. In the case that we do discovery on multiple
ACL connections, it is important that the existing subscriptions
are removed correctly by calling bt_gatt_unsubscribe.

In order to implement this change properly on some of the clients,
thet had no proper connection references or support
for clearing the data on disconnects, they had to be updated
as well.

The csip_notify.sh test has been disabled, as that expected a
notification in the client, but since this commit removes that
(until bonding is properly supported in the clients), then the
test will fail.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
2024-02-02 09:34:52 -06:00

153 lines
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/** @file
* @brief Internal APIs for Bluetooth MCP.
*/
/*
* Copyright (c) 2019 - 2021 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_BLUETOOTH_AUDIO_MCP_INTERNAL_
#define ZEPHYR_INCLUDE_BLUETOOTH_AUDIO_MCP_INTERNAL_
#include <zephyr/types.h>
#include <zephyr/bluetooth/gatt.h>
#include <zephyr/bluetooth/services/ots.h>
#include "../services/ots/ots_client_internal.h"
struct mcs_instance_t *lookup_inst_by_conn(struct bt_conn *conn);
struct mcs_instance_t {
struct bt_conn *conn;
uint16_t start_handle;
uint16_t end_handle;
uint16_t player_name_handle;
#ifdef CONFIG_BT_MCC_OTS
uint16_t icon_obj_id_handle;
#endif /* CONFIG_BT_MCC_OTS */
#if defined(CONFIG_BT_MCC_READ_MEDIA_PLAYER_ICON_URL)
uint16_t icon_url_handle;
#endif /* defined(CONFIG_BT_MCC_READ_MEDIA_PLAYER_ICON_URL) */
uint16_t track_changed_handle;
#if defined(CONFIG_BT_MCC_READ_TRACK_TITLE)
uint16_t track_title_handle;
#endif /* defined(CONFIG_BT_MCC_READ_TRACK_TITLE) */
#if defined(CONFIG_BT_MCC_READ_TRACK_DURATION)
uint16_t track_duration_handle;
#endif /* defined(CONFIG_BT_MCC_READ_TRACK_DURATION) */
#if defined(CONFIG_BT_MCC_READ_TRACK_POSITION) || defined(CONFIG_BT_MCC_SET_TRACK_POSITION)
uint16_t track_position_handle;
#endif /* defined(CONFIG_BT_MCC_READ_TRACK_POSITION) || defined(CONFIG_BT_MCC_SET_TRACK_POSITION) */
#if defined(CONFIG_BT_MCC_READ_PLAYBACK_SPEED) || defined(CONFIG_BT_MCC_SET_PLAYBACK_SPEED)
uint16_t playback_speed_handle;
#endif /* defined (CONFIG_BT_MCC_READ_PLAYBACK_SPEED) || */
/* defined (CONFIG_BT_MCC_SET_PLAYBACK_SPEED) */
#if defined(CONFIG_BT_MCC_READ_SEEKING_SPEED)
uint16_t seeking_speed_handle;
#endif /* defined (CONFIG_BT_MCC_READ_SEEKING_SPEED) */
#ifdef CONFIG_BT_MCC_OTS
uint16_t segments_obj_id_handle;
uint16_t current_track_obj_id_handle;
uint16_t next_track_obj_id_handle;
uint16_t current_group_obj_id_handle;
uint16_t parent_group_obj_id_handle;
#endif /* CONFIG_BT_MCC_OTS */
#if defined(CONFIG_BT_MCC_READ_PLAYING_ORDER) || defined(CONFIG_BT_MCC_SET_PLAYING_ORDER)
uint16_t playing_order_handle;
#endif /* defined(CONFIG_BT_MCC_READ_PLAYING_ORDER) || defined(CONFIG_BT_MCC_SET_PLAYING_ORDER) */
#if defined(CONFIG_BT_MCC_READ_PLAYING_ORDER_SUPPORTED)
uint16_t playing_orders_supported_handle;
#endif /* defined(CONFIG_BT_MCC_READ_PLAYING_ORDER_SUPPORTED) */
#if defined(CONFIG_BT_MCC_READ_MEDIA_STATE)
uint16_t media_state_handle;
#endif /* defined(CONFIG_BT_MCC_READ_MEDIA_STATE) */
uint16_t cp_handle;
#if defined(CONFIG_BT_MCC_READ_MEDIA_CONTROL_POINT_OPCODES_SUPPORTED)
uint16_t opcodes_supported_handle;
#endif /* defined(CONFIG_BT_MCC_READ_MEDIA_CONTROL_POINT_OPCODES_SUPPORTED) */
#ifdef CONFIG_BT_MCC_OTS
uint16_t scp_handle;
uint16_t search_results_obj_id_handle;
#endif /* CONFIG_BT_MCC_OTS */
#if defined(CONFIG_BT_MCC_READ_CONTENT_CONTROL_ID)
uint16_t content_control_id_handle;
#endif /* defined(CONFIG_BT_MCC_READ_CONTENT_CONTROL_ID) */
/* The write buffer is used for
* - track position (4 octets)
* - playback speed (1 octet)
* - playing order (1 octet)
* - the control point (5 octets)
* (1 octet opcode + optionally 4 octet param)
* (mpl_cmd.opcode + mpl_cmd.param)
* If the object transfer client is included, it is also used for
* - object IDs (6 octets - BT_OTS_OBJ_ID_SIZE) and
* - the search control point (64 octets - SEARCH_LEN_MAX)
*
* If there is no OTC, the largest is control point
* If OTC is included, the largest is the search control point
*/
#ifdef CONFIG_BT_MCC_OTS
char write_buf[SEARCH_LEN_MAX];
#else
/* Trick to be able to use sizeof on members of a struct type */
/* TODO: Rewrite the mpl_cmd to have the "use_param" parameter */
/* separately, and the opcode and param alone as a struct */
char write_buf[sizeof(((struct mpl_cmd *)0)->opcode) +
sizeof(((struct mpl_cmd *)0)->param)];
#endif /* CONFIG_BT_MCC_OTS */
struct bt_gatt_discover_params discover_params;
struct bt_gatt_read_params read_params;
struct bt_gatt_write_params write_params;
/** Any fields below here cannot be memset as part of a reset */
bool busy;
struct bt_gatt_subscribe_params player_name_sub_params;
struct bt_gatt_subscribe_params track_changed_sub_params;
#if defined(CONFIG_BT_MCC_READ_TRACK_TITLE_ENABLE_SUBSCRIPTION)
struct bt_gatt_subscribe_params track_title_sub_params;
#endif /* defined(CONFIG_BT_MCC_READ_TRACK_TITLE_ENABLE_SUBSCRIPTION) */
#if defined(CONFIG_BT_MCC_READ_TRACK_DURATION)
struct bt_gatt_subscribe_params track_duration_sub_params;
#endif /* defined(CONFIG_BT_MCC_READ_TRACK_DURATION) */
#if defined(CONFIG_BT_MCC_READ_TRACK_POSITION)
struct bt_gatt_subscribe_params track_position_sub_params;
#endif /* defined(CONFIG_BT_MCC_READ_TRACK_POSITION)*/
#if defined(CONFIG_BT_MCC_READ_PLAYBACK_SPEED)
struct bt_gatt_subscribe_params playback_speed_sub_params;
#endif /* defined (CONFIG_BT_MCC_READ_PLAYBACK_SPEED) */
#if defined(CONFIG_BT_MCC_READ_SEEKING_SPEED)
struct bt_gatt_subscribe_params seeking_speed_sub_params;
#endif /* defined (CONFIG_BT_MCC_READ_SEEKING_SPEED) */
#ifdef CONFIG_BT_MCC_OTS
struct bt_gatt_subscribe_params current_track_obj_sub_params;
struct bt_gatt_subscribe_params next_track_obj_sub_params;
struct bt_gatt_subscribe_params parent_group_obj_sub_params;
struct bt_gatt_subscribe_params current_group_obj_sub_params;
#endif /* CONFIG_BT_MCC_OTS */
#if defined(CONFIG_BT_MCC_READ_PLAYING_ORDER)
struct bt_gatt_subscribe_params playing_order_sub_params;
#endif /* defined(CONFIG_BT_MCC_READ_PLAYING_ORDER) */
#if defined(CONFIG_BT_MCC_READ_MEDIA_STATE)
struct bt_gatt_subscribe_params media_state_sub_params;
#endif /* defined(CONFIG_BT_MCC_READ_MEDIA_STATE) */
struct bt_gatt_subscribe_params cp_sub_params;
#if defined(CONFIG_BT_MCC_READ_MEDIA_CONTROL_POINT_OPCODES_SUPPORTED)
struct bt_gatt_subscribe_params opcodes_supported_sub_params;
#endif /* defined(CONFIG_BT_MCC_READ_MEDIA_CONTROL_POINT_OPCODES_SUPPORTED) */
#ifdef CONFIG_BT_MCC_OTS
struct bt_gatt_subscribe_params scp_sub_params;
struct bt_gatt_subscribe_params search_results_obj_sub_params;
#endif /* CONFIG_BT_MCC_OTS */
#ifdef CONFIG_BT_MCC_OTS
struct bt_ots_client otc;
#endif /* CONFIG_BT_MCC_OTS */
};
#endif /* ZEPHYR_INCLUDE_BLUETOOTH_AUDIO_MCP_INTERNAL_ */
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