blob: 04486215c49636dedc8a75c07d0c31f2b39501db [file] [log] [blame]
/** @file
* @brief Bluetooth Media Control Service
*/
/*
* Copyright (c) 2019 - 2021 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <stdbool.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <stdio.h>
#include <zephyr/types.h>
#include <zephyr/sys/atomic.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/sys/util.h>
#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/bluetooth/gatt.h>
#include <zephyr/bluetooth/services/ots.h>
#include <zephyr/bluetooth/audio/media_proxy.h>
#include "audio_internal.h"
#include "media_proxy_internal.h"
#include "mcs_internal.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(bt_mcs, CONFIG_BT_MCS_LOG_LEVEL);
static void notify(const struct bt_uuid *uuid, const void *data, uint16_t len);
static struct media_proxy_sctrl_cbs cbs;
enum {
FLAG_PLAYER_NAME_CHANGED,
FLAG_ICON_URL_CHANGED,
FLAG_TRACK_CHANGED,
FLAG_TRACK_TITLE_CHANGED,
FLAG_TRACK_DURATION_CHANGED,
FLAG_TRACK_POSITION_CHANGED,
FLAG_PLAYBACK_SPEED_CHANGED,
FLAG_SEEKING_SPEED_CHANGED,
FLAG_PLAYING_ORDER_CHANGED,
FLAG_MEDIA_STATE_CHANGED,
FLAG_MEDIA_CONTROL_OPCODES_CHANGED,
FLAG_MEDIA_CONTROL_POINT_BUSY,
FLAG_MEDIA_CONTROL_POINT_RESULT,
#if defined(CONFIG_BT_OTS)
FLAG_CURRENT_TRACK_OBJ_ID_CHANGED,
FLAG_NEXT_TRACK_OBJ_ID_CHANGED,
FLAG_PARENT_GROUP_OBJ_ID_CHANGED,
FLAG_CURRENT_GROUP_OBJ_ID_CHANGED,
FLAG_SEARCH_RESULTS_OBJ_ID_CHANGED,
FLAG_SEARCH_CONTROL_POINT_BUSY,
FLAG_SEARCH_CONTROL_POINT_RESULT,
#endif /* CONFIG_BT_OTS */
FLAG_NUM,
};
static struct client_state {
ATOMIC_DEFINE(flags, FLAG_NUM);
struct mpl_cmd_ntf cmd_ntf;
#if defined(CONFIG_BT_OTS)
uint8_t search_control_point_result;
#endif /* CONFIG_BT_OTS */
} clients[CONFIG_BT_MAX_CONN];
static void disconnected(struct bt_conn *conn, uint8_t reason)
{
/* Clear data on disconnect */
memset(&clients[bt_conn_index(conn)], 0, sizeof(struct client_state));
}
BT_CONN_CB_DEFINE(conn_callbacks) = {
.disconnected = disconnected,
};
/* Functions for reading and writing attributes, and for keeping track
* of attribute configuration changes.
* Functions for notifications are placed after the service definition.
*/
static ssize_t read_player_name(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
const char *name = media_proxy_sctrl_get_player_name();
LOG_DBG("Player name read: %s (offset %u)", name, offset);
if (offset == 0) {
atomic_clear_bit(client->flags, FLAG_PLAYER_NAME_CHANGED);
} else if (atomic_test_bit(client->flags, FLAG_PLAYER_NAME_CHANGED)) {
return BT_GATT_ERR(BT_MCS_ERR_LONG_VAL_CHANGED);
}
return bt_gatt_attr_read(conn, attr, buf, len, offset, name,
strlen(name));
}
static void player_name_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
#ifdef CONFIG_BT_OTS
static ssize_t read_icon_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
uint64_t icon_id = media_proxy_sctrl_get_icon_id();
uint8_t icon_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(icon_id, icon_id_le);
LOG_DBG_OBJ_ID("Icon object read: ", icon_id);
return bt_gatt_attr_read(conn, attr, buf, len, offset, icon_id_le,
sizeof(icon_id_le));
}
#endif /* CONFIG_BT_OTS */
static ssize_t read_icon_url(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
const char *url = media_proxy_sctrl_get_icon_url();
LOG_DBG("Icon URL read, offset: %d, len:%d, URL: %s", offset, len, url);
if (offset == 0) {
atomic_clear_bit(client->flags, FLAG_ICON_URL_CHANGED);
} else if (atomic_test_bit(client->flags, FLAG_ICON_URL_CHANGED)) {
return BT_GATT_ERR(BT_MCS_ERR_LONG_VAL_CHANGED);
}
return bt_gatt_attr_read(conn, attr, buf, len, offset, url,
strlen(url));
}
static void track_cfg_changed(const struct bt_gatt_attr *attr, uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_track_title(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
const char *title = media_proxy_sctrl_get_track_title();
LOG_DBG("Track title read, offset: %d, len:%d, title: %s", offset, len, title);
if (offset == 0) {
atomic_clear_bit(client->flags, FLAG_TRACK_TITLE_CHANGED);
} else if (atomic_test_bit(client->flags, FLAG_TRACK_TITLE_CHANGED)) {
return BT_GATT_ERR(BT_MCS_ERR_LONG_VAL_CHANGED);
}
return bt_gatt_attr_read(conn, attr, buf, len, offset, title,
strlen(title));
}
static void track_title_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_track_duration(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
int32_t duration = media_proxy_sctrl_get_track_duration();
int32_t duration_le = sys_cpu_to_le32(duration);
LOG_DBG("Track duration read: %d (0x%08x)", duration, duration);
atomic_clear_bit(client->flags, FLAG_TRACK_DURATION_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &duration_le,
sizeof(duration_le));
}
static void track_duration_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_track_position(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
int32_t position = media_proxy_sctrl_get_track_position();
int32_t position_le = sys_cpu_to_le32(position);
LOG_DBG("Track position read: %d (0x%08x)", position, position);
atomic_clear_bit(client->flags, FLAG_TRACK_POSITION_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &position_le,
sizeof(position_le));
}
static ssize_t write_track_position(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len,
uint16_t offset, uint8_t flags)
{
int32_t position;
if (offset != 0) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != sizeof(position)) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
position = sys_get_le32((uint8_t *)buf);
media_proxy_sctrl_set_track_position(position);
LOG_DBG("Track position write: %d", position);
return len;
}
static void track_position_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_playback_speed(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
int8_t speed = media_proxy_sctrl_get_playback_speed();
LOG_DBG("Playback speed read: %d", speed);
atomic_clear_bit(client->flags, FLAG_PLAYBACK_SPEED_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &speed,
sizeof(speed));
}
static ssize_t write_playback_speed(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset,
uint8_t flags)
{
int8_t speed;
if (offset != 0) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != sizeof(speed)) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
memcpy(&speed, buf, len);
media_proxy_sctrl_set_playback_speed(speed);
LOG_DBG("Playback speed write: %d", speed);
return len;
}
static void playback_speed_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_seeking_speed(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
int8_t speed = media_proxy_sctrl_get_seeking_speed();
LOG_DBG("Seeking speed read: %d", speed);
atomic_clear_bit(client->flags, FLAG_SEEKING_SPEED_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &speed,
sizeof(speed));
}
static void seeking_speed_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
#ifdef CONFIG_BT_OTS
static ssize_t read_track_segments_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset)
{
uint64_t track_segments_id = media_proxy_sctrl_get_track_segments_id();
uint8_t track_segments_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(track_segments_id, track_segments_id_le);
LOG_DBG_OBJ_ID("Track segments ID read: ", track_segments_id);
return bt_gatt_attr_read(conn, attr, buf, len, offset,
track_segments_id_le, sizeof(track_segments_id_le));
}
static ssize_t read_current_track_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint64_t track_id = media_proxy_sctrl_get_current_track_id();
uint8_t track_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(track_id, track_id_le);
LOG_DBG_OBJ_ID("Current track ID read: ", track_id);
atomic_clear_bit(client->flags, FLAG_CURRENT_TRACK_OBJ_ID_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, track_id_le,
sizeof(track_id_le));
}
static ssize_t write_current_track_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset,
uint8_t flags)
{
uint64_t id;
if (offset != 0) {
LOG_DBG("Invalid offset");
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != BT_OTS_OBJ_ID_SIZE) {
LOG_DBG("Invalid length");
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
id = sys_get_le48((uint8_t *)buf);
if (IS_ENABLED(CONFIG_BT_MCS_LOG_LEVEL_DBG)) {
char str[BT_OTS_OBJ_ID_STR_LEN];
(void)bt_ots_obj_id_to_str(id, str, sizeof(str));
LOG_DBG("Current track write: offset: %d, len: %d, track ID: %s", offset, len, str);
}
media_proxy_sctrl_set_current_track_id(id);
return BT_OTS_OBJ_ID_SIZE;
}
static void current_track_id_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_next_track_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint64_t track_id = media_proxy_sctrl_get_next_track_id();
uint8_t track_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(track_id, track_id_le);
atomic_clear_bit(client->flags, FLAG_NEXT_TRACK_OBJ_ID_CHANGED);
if (track_id == MPL_NO_TRACK_ID) {
LOG_DBG("Next track read, but it is empty");
/* "If the media player has no next track, the length of the */
/* characteristic shall be zero." */
return bt_gatt_attr_read(conn, attr, buf, len, offset, NULL, 0);
}
LOG_DBG_OBJ_ID("Next track read: ", track_id);
return bt_gatt_attr_read(conn, attr, buf, len, offset,
track_id_le, sizeof(track_id_le));
}
static ssize_t write_next_track_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset,
uint8_t flags)
{
uint64_t id;
if (offset != 0) {
LOG_DBG("Invalid offset");
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != BT_OTS_OBJ_ID_SIZE) {
LOG_DBG("Invalid length");
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
id = sys_get_le48((uint8_t *)buf);
if (IS_ENABLED(CONFIG_BT_MCS_LOG_LEVEL_DBG)) {
char str[BT_OTS_OBJ_ID_STR_LEN];
(void)bt_ots_obj_id_to_str(id, str, sizeof(str));
LOG_DBG("Next track write: offset: %d, len: %d, track ID: %s", offset, len, str);
}
media_proxy_sctrl_set_next_track_id(id);
return BT_OTS_OBJ_ID_SIZE;
}
static void next_track_id_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_parent_group_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint64_t group_id = media_proxy_sctrl_get_parent_group_id();
uint8_t group_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(group_id, group_id_le);
LOG_DBG_OBJ_ID("Parent group read: ", group_id);
atomic_clear_bit(client->flags, FLAG_PARENT_GROUP_OBJ_ID_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, group_id_le,
sizeof(group_id_le));
}
static void parent_group_id_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_current_group_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint64_t group_id = media_proxy_sctrl_get_current_group_id();
uint8_t group_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(group_id, group_id_le);
LOG_DBG_OBJ_ID("Current group read: ", group_id);
atomic_clear_bit(client->flags, FLAG_CURRENT_GROUP_OBJ_ID_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, group_id_le,
sizeof(group_id_le));
}
static ssize_t write_current_group_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset,
uint8_t flags)
{
uint64_t id;
if (offset != 0) {
LOG_DBG("Invalid offset");
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != BT_OTS_OBJ_ID_SIZE) {
LOG_DBG("Invalid length");
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
id = sys_get_le48((uint8_t *)buf);
if (IS_ENABLED(CONFIG_BT_MCS_LOG_LEVEL_DBG)) {
char str[BT_OTS_OBJ_ID_STR_LEN];
(void)bt_ots_obj_id_to_str(id, str, sizeof(str));
LOG_DBG("Current group ID write: offset: %d, len: %d, track ID: %s", offset, len,
str);
}
media_proxy_sctrl_set_current_group_id(id);
return BT_OTS_OBJ_ID_SIZE;
}
static void current_group_id_cfg_changed(const struct bt_gatt_attr *attr, uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
#endif /* CONFIG_BT_OTS */
static ssize_t read_playing_order(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint8_t order = media_proxy_sctrl_get_playing_order();
LOG_DBG("Playing order read: %d (0x%02x)", order, order);
atomic_clear_bit(client->flags, FLAG_PLAYING_ORDER_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &order,
sizeof(order));
}
static ssize_t write_playing_order(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset,
uint8_t flags)
{
LOG_DBG("Playing order write");
int8_t order;
if (offset != 0) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != sizeof(order)) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
memcpy(&order, buf, len);
media_proxy_sctrl_set_playing_order(order);
LOG_DBG("Playing order write: %d", order);
return len;
}
static void playing_order_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_playing_orders_supported(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset)
{
uint16_t orders = media_proxy_sctrl_get_playing_orders_supported();
uint16_t orders_le = sys_cpu_to_le16(orders);
LOG_DBG("Playing orders read: %d (0x%04x)", orders, orders);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &orders_le,
sizeof(orders_le));
}
static ssize_t read_media_state(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint8_t state = media_proxy_sctrl_get_media_state();
LOG_DBG("Media state read: %d", state);
atomic_clear_bit(client->flags, FLAG_MEDIA_STATE_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &state,
sizeof(state));
}
static void media_state_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t write_control_point(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len, uint16_t offset,
uint8_t flags)
{
struct client_state *client = &clients[bt_conn_index(conn)];
struct mpl_cmd command;
if (offset != 0) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len != sizeof(command.opcode) &&
len != sizeof(command.opcode) + sizeof(command.param)) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
memcpy(&command.opcode, buf, sizeof(command.opcode));
LOG_DBG("Opcode: %d", command.opcode);
command.use_param = false;
if (!BT_MCS_VALID_OP(command.opcode)) {
/* MCS does not specify what to return in case of an error - Only what to notify*/
const struct mpl_cmd_ntf cmd_ntf = {
.requested_opcode = command.opcode,
.result_code = BT_MCS_OPC_NTF_NOT_SUPPORTED,
};
LOG_DBG("Opcode 0x%02X is invalid", command.opcode);
notify(BT_UUID_MCS_MEDIA_CONTROL_POINT, &cmd_ntf, sizeof(cmd_ntf));
return BT_GATT_ERR(BT_ATT_ERR_VALUE_NOT_ALLOWED);
} else if (atomic_test_and_set_bit(client->flags, FLAG_MEDIA_CONTROL_POINT_BUSY)) {
const struct mpl_cmd_ntf cmd_ntf = {
.requested_opcode = command.opcode,
.result_code = BT_MCS_OPC_NTF_CANNOT_BE_COMPLETED,
};
LOG_DBG("Busy with other operation");
notify(BT_UUID_MCS_MEDIA_CONTROL_POINT, &cmd_ntf, sizeof(cmd_ntf));
return BT_GATT_ERR(BT_ATT_ERR_PROCEDURE_IN_PROGRESS);
}
if (len == sizeof(command.opcode) + sizeof(command.param)) {
command.param = sys_get_le32((char *)buf + sizeof(command.opcode));
command.use_param = true;
LOG_DBG("Parameter: %d", command.param);
}
media_proxy_sctrl_send_command(&command);
return len;
}
static void control_point_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_opcodes_supported(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint32_t opcodes = media_proxy_sctrl_get_commands_supported();
uint32_t opcodes_le = sys_cpu_to_le32(opcodes);
LOG_DBG("Opcodes_supported read: %d (0x%08x)", opcodes, opcodes);
atomic_clear_bit(client->flags, FLAG_MEDIA_CONTROL_OPCODES_CHANGED);
return bt_gatt_attr_read(conn, attr, buf, len, offset,
&opcodes_le, sizeof(opcodes_le));
}
static void opcodes_supported_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
#ifdef CONFIG_BT_OTS
static ssize_t write_search_control_point(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
const void *buf, uint16_t len,
uint16_t offset, uint8_t flags)
{
struct client_state *client = &clients[bt_conn_index(conn)];
struct mpl_search search = {0};
if (offset != 0) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET);
}
if (len > SEARCH_LEN_MAX || len < SEARCH_LEN_MIN) {
return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN);
}
if (atomic_test_and_set_bit(client->flags, FLAG_SEARCH_CONTROL_POINT_BUSY)) {
const uint8_t result_code = BT_MCS_SCP_NTF_FAILURE;
LOG_DBG("Busy with other operation");
notify(BT_UUID_MCS_SEARCH_CONTROL_POINT, &result_code, sizeof(result_code));
return BT_GATT_ERR(BT_ATT_ERR_PROCEDURE_IN_PROGRESS);
}
memcpy(&search.search, (char *)buf, len);
search.len = len;
LOG_DBG("Search length: %d", len);
LOG_HEXDUMP_DBG(&search.search, search.len, "Search content");
media_proxy_sctrl_send_search(&search);
return len;
}
static void search_control_point_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
static ssize_t read_search_results_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr,
void *buf, uint16_t len, uint16_t offset)
{
struct client_state *client = &clients[bt_conn_index(conn)];
uint64_t search_id = media_proxy_sctrl_get_search_results_id();
LOG_DBG_OBJ_ID("Search results id read: ", search_id);
atomic_clear_bit(client->flags, FLAG_SEARCH_RESULTS_OBJ_ID_CHANGED);
/* TODO: The permanent solution here should be that the call to */
/* mpl should fill the UUID in a pointed-to value, and return a */
/* length or an error code, to indicate whether this ID has a */
/* value now. This should be done for all functions of this kind. */
/* For now, fix the issue here - send zero-length data if the */
/* ID is zero. */
/* *Spec requirement - IDs may not be valid, in which case the */
/* characteristic shall be zero length. */
if (search_id == 0) {
return bt_gatt_attr_read(conn, attr, buf, len, offset,
NULL, 0);
} else {
uint8_t search_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(search_id, search_id_le);
return bt_gatt_attr_read(conn, attr, buf, len, offset,
&search_id_le, sizeof(search_id_le));
}
}
static void search_results_id_cfg_changed(const struct bt_gatt_attr *attr,
uint16_t value)
{
LOG_DBG("value 0x%04x", value);
}
#endif /* CONFIG_BT_OTS */
static ssize_t read_content_ctrl_id(struct bt_conn *conn,
const struct bt_gatt_attr *attr, void *buf,
uint16_t len, uint16_t offset)
{
uint8_t id = media_proxy_sctrl_get_content_ctrl_id();
LOG_DBG("Content control ID read: %d", id);
return bt_gatt_attr_read(conn, attr, buf, len, offset, &id,
sizeof(id));
}
/* Defines for OTS-dependent characteristics - empty if no OTS */
#ifdef CONFIG_BT_OTS
#define ICON_OBJ_ID_CHARACTERISTIC_IF_OTS \
BT_AUDIO_CHRC(BT_UUID_MCS_ICON_OBJ_ID, \
BT_GATT_CHRC_READ, \
BT_GATT_PERM_READ_ENCRYPT, \
read_icon_id, NULL, NULL),
#define SEGMENTS_TRACK_GROUP_ID_CHARACTERISTICS_IF_OTS \
BT_AUDIO_CHRC(BT_UUID_MCS_TRACK_SEGMENTS_OBJ_ID, \
BT_GATT_CHRC_READ, \
BT_GATT_PERM_READ_ENCRYPT, \
read_track_segments_id, NULL, NULL), \
BT_AUDIO_CHRC(BT_UUID_MCS_CURRENT_TRACK_OBJ_ID, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE | \
BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT, \
read_current_track_id, write_current_track_id, NULL), \
BT_AUDIO_CCC(current_track_id_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_NEXT_TRACK_OBJ_ID, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE | \
BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT, \
read_next_track_id, write_next_track_id, NULL), \
BT_AUDIO_CCC(next_track_id_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_PARENT_GROUP_OBJ_ID, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_parent_group_id, NULL, NULL), \
BT_AUDIO_CCC(parent_group_id_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_CURRENT_GROUP_OBJ_ID, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE | \
BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT, \
read_current_group_id, write_current_group_id, NULL), \
BT_AUDIO_CCC(current_group_id_cfg_changed),
#define SEARCH_CHARACTERISTICS_IF_OTS \
BT_AUDIO_CHRC(BT_UUID_MCS_SEARCH_CONTROL_POINT, \
BT_GATT_CHRC_WRITE | BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_WRITE_ENCRYPT, \
NULL, write_search_control_point, NULL), \
BT_AUDIO_CCC(search_control_point_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_SEARCH_RESULTS_OBJ_ID, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_search_results_id, NULL, NULL), \
BT_AUDIO_CCC(search_results_id_cfg_changed),
#else
#define ICON_OBJ_ID_CHARACTERISTIC_IF_OTS
#define SEGMENTS_TRACK_GROUP_ID_CHARACTERISTICS_IF_OTS
#define SEARCH_CHARACTERISTICS_IF_OTS
#endif /* CONFIG_BT_OTS */
/* Media control service attributes */
#define BT_MCS_SERVICE_DEFINITION \
BT_GATT_PRIMARY_SERVICE(BT_UUID_GMCS), \
BT_GATT_INCLUDE_SERVICE(NULL), /* To be overwritten */ \
BT_AUDIO_CHRC(BT_UUID_MCS_PLAYER_NAME, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_player_name, NULL, NULL), \
BT_AUDIO_CCC(player_name_cfg_changed), \
ICON_OBJ_ID_CHARACTERISTIC_IF_OTS \
BT_AUDIO_CHRC(BT_UUID_MCS_ICON_URL, \
BT_GATT_CHRC_READ, \
BT_GATT_PERM_READ_ENCRYPT, \
read_icon_url, NULL, NULL), \
BT_AUDIO_CHRC(BT_UUID_MCS_TRACK_CHANGED, \
BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_NONE, \
NULL, NULL, NULL), \
BT_AUDIO_CCC(track_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_TRACK_TITLE, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_track_title, NULL, NULL), \
BT_AUDIO_CCC(track_title_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_TRACK_DURATION, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_track_duration, NULL, NULL), \
BT_AUDIO_CCC(track_duration_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_TRACK_POSITION, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE | \
BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT, \
read_track_position, write_track_position, NULL), \
BT_AUDIO_CCC(track_position_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_PLAYBACK_SPEED, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE | \
BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT, \
read_playback_speed, write_playback_speed, NULL), \
BT_AUDIO_CCC(playback_speed_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_SEEKING_SPEED, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_seeking_speed, NULL, NULL), \
BT_AUDIO_CCC(seeking_speed_cfg_changed), \
SEGMENTS_TRACK_GROUP_ID_CHARACTERISTICS_IF_OTS \
BT_AUDIO_CHRC(BT_UUID_MCS_PLAYING_ORDER, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_WRITE | \
BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT, \
read_playing_order, write_playing_order, NULL), \
BT_AUDIO_CCC(playing_order_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_PLAYING_ORDERS, \
BT_GATT_CHRC_READ, \
BT_GATT_PERM_READ_ENCRYPT, \
read_playing_orders_supported, NULL, NULL), \
BT_AUDIO_CHRC(BT_UUID_MCS_MEDIA_STATE, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_media_state, NULL, NULL), \
BT_AUDIO_CCC(media_state_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_MEDIA_CONTROL_POINT, \
BT_GATT_CHRC_WRITE | BT_GATT_CHRC_WRITE_WITHOUT_RESP | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_WRITE_ENCRYPT, \
NULL, write_control_point, NULL), \
BT_AUDIO_CCC(control_point_cfg_changed), \
BT_AUDIO_CHRC(BT_UUID_MCS_MEDIA_CONTROL_OPCODES, \
BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY, \
BT_GATT_PERM_READ_ENCRYPT, \
read_opcodes_supported, NULL, NULL), \
BT_AUDIO_CCC(opcodes_supported_cfg_changed), \
SEARCH_CHARACTERISTICS_IF_OTS \
BT_AUDIO_CHRC(BT_UUID_CCID, \
BT_GATT_CHRC_READ, \
BT_GATT_PERM_READ_ENCRYPT, \
read_content_ctrl_id, NULL, NULL)
static struct bt_gatt_attr svc_attrs[] = { BT_MCS_SERVICE_DEFINITION };
static struct bt_gatt_service mcs;
#ifdef CONFIG_BT_OTS
static struct bt_ots *ots;
#endif /* CONFIG_BT_OTS */
#ifdef CONFIG_BT_OTS
struct bt_ots *bt_mcs_get_ots(void)
{
return ots;
}
#endif /* CONFIG_BT_OTS */
/* Callback functions from the media player, notifying attributes */
/* Placed here, after the service definition, because they reference it. */
/* Helper function to notify non-string values */
static void notify(const struct bt_uuid *uuid, const void *data, uint16_t len)
{
int err = bt_gatt_notify_uuid(NULL, uuid, mcs.attrs, data, len);
if (err) {
if (err == -ENOTCONN) {
LOG_DBG("Notification error: ENOTCONN (%d)", err);
} else {
LOG_ERR("Notification error: %d", err);
}
}
}
static void notify_string(struct bt_conn *conn, const struct bt_uuid *uuid, const char *str)
{
const uint8_t att_header_size = 3; /* opcode + handle */
uint16_t att_mtu;
uint16_t maxlen;
int err;
att_mtu = bt_gatt_get_mtu(conn);
__ASSERT(att_mtu > att_header_size, "Could not get valid ATT MTU");
maxlen = att_mtu - att_header_size; /* Subtract opcode and handle */
/* Send notifcation potentially truncated to the MTU */
err = bt_gatt_notify_uuid(conn, uuid, mcs.attrs, (void *)str,
MIN(strlen(str), maxlen));
if (err != 0) {
LOG_ERR("Notification error: %d", err);
}
}
static void mark_icon_url_changed_cb(struct bt_conn *conn, void *data)
{
struct client_state *client = &clients[bt_conn_index(conn)];
struct bt_conn_info info;
int err;
err = bt_conn_get_info(conn, &info);
if (err != 0) {
LOG_ERR("Failed to get conn info: %d", err);
return;
}
if (info.state != BT_CONN_STATE_CONNECTED) {
/* Not connected */
return;
}
atomic_set_bit(client->flags, FLAG_ICON_URL_CHANGED);
}
static void notify_cb(struct bt_conn *conn, void *data)
{
struct client_state *client = &clients[bt_conn_index(conn)];
struct bt_conn_info info;
int err;
err = bt_conn_get_info(conn, &info);
if (err != 0) {
LOG_ERR("Failed to get conn info: %d", err);
return;
}
if (info.state != BT_CONN_STATE_CONNECTED) {
/* Not connected */
return;
}
if (atomic_test_and_clear_bit(client->flags, FLAG_PLAYER_NAME_CHANGED)) {
const char *name = media_proxy_sctrl_get_player_name();
LOG_DBG("Notifying player name: %s", name);
notify_string(conn, BT_UUID_MCS_PLAYER_NAME, name);
}
if (atomic_test_and_clear_bit(client->flags, FLAG_TRACK_TITLE_CHANGED)) {
const char *title = media_proxy_sctrl_get_track_title();
LOG_DBG("Notifying track title: %s", title);
notify_string(conn, BT_UUID_MCS_TRACK_TITLE, title);
}
if (atomic_test_and_clear_bit(client->flags, FLAG_TRACK_DURATION_CHANGED)) {
int32_t duration = media_proxy_sctrl_get_track_duration();
int32_t duration_le = sys_cpu_to_le32(duration);
LOG_DBG("Notifying track duration: %d", duration);
notify(BT_UUID_MCS_TRACK_DURATION, &duration_le, sizeof(duration_le));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_TRACK_POSITION_CHANGED)) {
int32_t position = media_proxy_sctrl_get_track_position();
int32_t position_le = sys_cpu_to_le32(position);
LOG_DBG("Notifying track position: %d", position);
notify(BT_UUID_MCS_TRACK_POSITION, &position_le, sizeof(position_le));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_PLAYBACK_SPEED_CHANGED)) {
int8_t speed = media_proxy_sctrl_get_playback_speed();
LOG_DBG("Notifying playback speed: %d", speed);
notify(BT_UUID_MCS_PLAYBACK_SPEED, &speed, sizeof(speed));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_SEEKING_SPEED_CHANGED)) {
int8_t speed = media_proxy_sctrl_get_seeking_speed();
LOG_DBG("Notifying seeking speed: %d", speed);
notify(BT_UUID_MCS_SEEKING_SPEED, &speed, sizeof(speed));
}
#if defined(CONFIG_BT_OTS)
if (atomic_test_and_clear_bit(client->flags, FLAG_CURRENT_TRACK_OBJ_ID_CHANGED)) {
uint64_t track_id = media_proxy_sctrl_get_current_track_id();
uint8_t track_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(track_id, track_id_le);
LOG_DBG_OBJ_ID("Notifying current track ID: ", track_id);
notify(BT_UUID_MCS_CURRENT_TRACK_OBJ_ID, track_id_le, sizeof(track_id_le));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_NEXT_TRACK_OBJ_ID_CHANGED)) {
uint64_t track_id = media_proxy_sctrl_get_next_track_id();
if (track_id == MPL_NO_TRACK_ID) {
/* "If the media player has no next track, the length of the
* characteristic shall be zero."
*/
LOG_DBG_OBJ_ID("Notifying EMPTY next track ID: ", track_id);
notify(BT_UUID_MCS_NEXT_TRACK_OBJ_ID, NULL, 0);
} else {
uint8_t track_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(track_id, track_id_le);
LOG_DBG_OBJ_ID("Notifying next track ID: ", track_id);
notify(BT_UUID_MCS_NEXT_TRACK_OBJ_ID, track_id_le, sizeof(track_id_le));
}
}
if (atomic_test_and_clear_bit(client->flags, FLAG_PARENT_GROUP_OBJ_ID_CHANGED)) {
uint64_t group_id = media_proxy_sctrl_get_parent_group_id();
uint8_t group_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(group_id, group_id_le);
LOG_DBG_OBJ_ID("Notifying parent group ID: ", group_id);
notify(BT_UUID_MCS_PARENT_GROUP_OBJ_ID, &group_id_le, sizeof(group_id_le));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_CURRENT_GROUP_OBJ_ID_CHANGED)) {
uint64_t group_id = media_proxy_sctrl_get_current_group_id();
uint8_t group_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(group_id, group_id_le);
LOG_DBG_OBJ_ID("Notifying current group ID: ", group_id);
notify(BT_UUID_MCS_CURRENT_GROUP_OBJ_ID, &group_id_le, sizeof(group_id_le));
}
#endif /* CONFIG_BT_OTS */
if (atomic_test_and_clear_bit(client->flags, FLAG_TRACK_CHANGED)) {
LOG_DBG("Notifying track change");
notify(BT_UUID_MCS_TRACK_CHANGED, NULL, 0);
}
if (atomic_test_and_clear_bit(client->flags, FLAG_PLAYING_ORDER_CHANGED)) {
uint8_t order = media_proxy_sctrl_get_playing_order();
LOG_DBG("Notifying playing order: %d", order);
notify(BT_UUID_MCS_PLAYING_ORDER, &order, sizeof(order));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_MEDIA_STATE_CHANGED)) {
uint8_t state = media_proxy_sctrl_get_media_state();
LOG_DBG("Notifying media state: %d", state);
notify(BT_UUID_MCS_MEDIA_STATE, &state, sizeof(state));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_MEDIA_CONTROL_OPCODES_CHANGED)) {
uint32_t opcodes = media_proxy_sctrl_get_commands_supported();
uint32_t opcodes_le = sys_cpu_to_le32(opcodes);
LOG_DBG("Notifying command opcodes supported: %d (0x%08x)", opcodes, opcodes);
notify(BT_UUID_MCS_MEDIA_CONTROL_OPCODES, &opcodes_le, sizeof(opcodes_le));
}
#if defined(CONFIG_BT_OTS)
if (atomic_test_and_clear_bit(client->flags, FLAG_SEARCH_RESULTS_OBJ_ID_CHANGED)) {
uint64_t search_id = media_proxy_sctrl_get_search_results_id();
uint8_t search_id_le[BT_OTS_OBJ_ID_SIZE];
sys_put_le48(search_id, search_id_le);
LOG_DBG_OBJ_ID("Notifying search results ID: ", search_id);
notify(BT_UUID_MCS_SEARCH_RESULTS_OBJ_ID, &search_id_le, sizeof(search_id_le));
}
if (atomic_test_and_clear_bit(client->flags, FLAG_SEARCH_CONTROL_POINT_RESULT)) {
uint8_t result_code = client->search_control_point_result;
LOG_DBG("Notifying search control point - result: %d", result_code);
notify(BT_UUID_MCS_SEARCH_CONTROL_POINT, &result_code, sizeof(result_code));
}
#endif /* CONFIG_BT_OTS */
if (atomic_test_and_clear_bit(client->flags, FLAG_MEDIA_CONTROL_POINT_RESULT)) {
LOG_DBG("Notifying control point command - opcode: %d, result: %d",
client->cmd_ntf.requested_opcode, client->cmd_ntf.result_code);
notify(BT_UUID_MCS_MEDIA_CONTROL_POINT, &client->cmd_ntf, sizeof(client->cmd_ntf));
}
}
static void deferred_nfy_work_handler(struct k_work *work)
{
bt_conn_foreach(BT_CONN_TYPE_LE, notify_cb, NULL);
}
static K_WORK_DEFINE(deferred_nfy_work, deferred_nfy_work_handler);
static void defer_value_ntf(struct bt_conn *conn, void *data)
{
struct client_state *client = &clients[bt_conn_index(conn)];
struct bt_conn_info info;
int err;
err = bt_conn_get_info(conn, &info);
if (err != 0) {
LOG_ERR("Failed to get conn info: %d", err);
return;
}
if (info.state != BT_CONN_STATE_CONNECTED) {
/* Not connected */
return;
}
atomic_set_bit(client->flags, POINTER_TO_UINT(data));
k_work_submit(&deferred_nfy_work);
}
static void media_proxy_sctrl_player_name_cb(const char *name)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_PLAYER_NAME_CHANGED));
}
void media_proxy_sctrl_icon_url_cb(const char *name)
{
bt_conn_foreach(BT_CONN_TYPE_LE, mark_icon_url_changed_cb, NULL);
}
void media_proxy_sctrl_track_changed_cb(void)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_TRACK_CHANGED));
}
void media_proxy_sctrl_track_title_cb(const char *title)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_TRACK_TITLE_CHANGED));
}
void media_proxy_sctrl_track_position_cb(int32_t position)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_TRACK_POSITION_CHANGED));
}
void media_proxy_sctrl_track_duration_cb(int32_t duration)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_TRACK_DURATION_CHANGED));
}
void media_proxy_sctrl_playback_speed_cb(int8_t speed)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_PLAYBACK_SPEED_CHANGED));
}
void media_proxy_sctrl_seeking_speed_cb(int8_t speed)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_SEEKING_SPEED_CHANGED));
}
#if defined(CONFIG_BT_OTS)
void media_proxy_sctrl_current_track_id_cb(uint64_t id)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_CURRENT_TRACK_OBJ_ID_CHANGED));
}
void media_proxy_sctrl_next_track_id_cb(uint64_t id)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_NEXT_TRACK_OBJ_ID_CHANGED));
}
void media_proxy_sctrl_parent_group_id_cb(uint64_t id)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_PARENT_GROUP_OBJ_ID_CHANGED));
}
void media_proxy_sctrl_current_group_id_cb(uint64_t id)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_CURRENT_GROUP_OBJ_ID_CHANGED));
}
#endif /* CONFIG_BT_OTS */
void media_proxy_sctrl_playing_order_cb(uint8_t order)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_PLAYING_ORDER_CHANGED));
}
void media_proxy_sctrl_media_state_cb(uint8_t state)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_MEDIA_STATE_CHANGED));
}
static void defer_media_control_point_ntf(struct bt_conn *conn, void *data)
{
struct client_state *client = &clients[bt_conn_index(conn)];
const struct mpl_cmd_ntf *cmd_ntf = data;
struct bt_conn_info info;
int err;
err = bt_conn_get_info(conn, &info);
if (err != 0) {
LOG_ERR("Failed to get conn info: %d", err);
return;
}
if (info.state != BT_CONN_STATE_CONNECTED) {
/* Not connected */
return;
}
if (atomic_test_and_clear_bit(client->flags, FLAG_MEDIA_CONTROL_POINT_BUSY)) {
client->cmd_ntf = *cmd_ntf;
atomic_set_bit(client->flags, FLAG_MEDIA_CONTROL_POINT_RESULT);
k_work_submit(&deferred_nfy_work);
}
}
void media_proxy_sctrl_command_cb(const struct mpl_cmd_ntf *cmd_ntf)
{
/* FIXME: Control Point notification shall be sent to operation initiator only */
bt_conn_foreach(BT_CONN_TYPE_LE, defer_media_control_point_ntf, (void *)cmd_ntf);
}
void media_proxy_sctrl_commands_supported_cb(uint32_t opcodes)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_MEDIA_CONTROL_OPCODES_CHANGED));
}
#if defined(CONFIG_BT_OTS)
static void defer_search_control_point_ntf(struct bt_conn *conn, void *data)
{
struct client_state *client = &clients[bt_conn_index(conn)];
struct bt_conn_info info;
int err;
err = bt_conn_get_info(conn, &info);
if (err != 0) {
LOG_ERR("Failed to get conn info: %d", err);
return;
}
if (info.state != BT_CONN_STATE_CONNECTED) {
/* Not connected */
return;
}
if (atomic_test_and_clear_bit(client->flags, FLAG_SEARCH_CONTROL_POINT_BUSY)) {
client->search_control_point_result = POINTER_TO_UINT(data);
atomic_set_bit(client->flags, FLAG_SEARCH_CONTROL_POINT_RESULT);
k_work_submit(&deferred_nfy_work);
}
}
void media_proxy_sctrl_search_cb(uint8_t result_code)
{
/* FIXME: Control Point notification shall be sent to operation initiator only */
bt_conn_foreach(BT_CONN_TYPE_LE, defer_search_control_point_ntf,
UINT_TO_POINTER(result_code));
}
void media_proxy_sctrl_search_results_id_cb(uint64_t id)
{
bt_conn_foreach(BT_CONN_TYPE_LE, defer_value_ntf,
UINT_TO_POINTER(FLAG_SEARCH_RESULTS_OBJ_ID_CHANGED));
}
#endif /* CONFIG_BT_OTS */
/* Register the service */
int bt_mcs_init(struct bt_ots_cb *ots_cbs)
{
static bool initialized;
int err;
if (initialized) {
LOG_DBG("Already initialized");
return -EALREADY;
}
mcs = (struct bt_gatt_service)BT_GATT_SERVICE(svc_attrs);
#ifdef CONFIG_BT_OTS
struct bt_ots_init ots_init;
ots = bt_ots_free_instance_get();
if (!ots) {
LOG_ERR("Failed to retrieve OTS instance\n");
return -ENOMEM;
}
/* Configure OTS initialization. */
memset(&ots_init, 0, sizeof(ots_init));
BT_OTS_OACP_SET_FEAT_READ(ots_init.features.oacp);
BT_OTS_OLCP_SET_FEAT_GO_TO(ots_init.features.olcp);
ots_init.cb = ots_cbs;
/* Initialize OTS instance. */
err = bt_ots_init(ots, &ots_init);
if (err) {
LOG_ERR("Failed to init OTS (err:%d)\n", err);
return err;
}
/* TODO: Maybe the user_data pointer can be in a different way */
for (int i = 0; i < mcs.attr_count; i++) {
if (!bt_uuid_cmp(mcs.attrs[i].uuid, BT_UUID_GATT_INCLUDE)) {
mcs.attrs[i].user_data = bt_ots_svc_decl_get(ots);
}
}
#endif /* CONFIG_BT_OTS */
err = bt_gatt_service_register(&mcs);
if (err) {
LOG_ERR("Could not register the MCS service");
#ifdef CONFIG_BT_OTS
/* TODO: How does one un-register the OTS? */
#endif /* CONFIG_BT_OTS */
return -ENOEXEC;
}
/* Set up the callback structure */
cbs.player_name = media_proxy_sctrl_player_name_cb;
cbs.icon_url = media_proxy_sctrl_icon_url_cb;
cbs.track_changed = media_proxy_sctrl_track_changed_cb;
cbs.track_title = media_proxy_sctrl_track_title_cb;
cbs.track_duration = media_proxy_sctrl_track_duration_cb;
cbs.track_position = media_proxy_sctrl_track_position_cb;
cbs.playback_speed = media_proxy_sctrl_playback_speed_cb;
cbs.seeking_speed = media_proxy_sctrl_seeking_speed_cb;
#ifdef CONFIG_BT_OTS
cbs.current_track_id = media_proxy_sctrl_current_track_id_cb;
cbs.next_track_id = media_proxy_sctrl_next_track_id_cb;
cbs.parent_group_id = media_proxy_sctrl_parent_group_id_cb;
cbs.current_group_id = media_proxy_sctrl_current_group_id_cb;
#endif /* CONFIG_BT_OTS */
cbs.playing_order = media_proxy_sctrl_playing_order_cb;
cbs.media_state = media_proxy_sctrl_media_state_cb;
cbs.command = media_proxy_sctrl_command_cb;
cbs.commands_supported = media_proxy_sctrl_commands_supported_cb;
#ifdef CONFIG_BT_OTS
cbs.search = media_proxy_sctrl_search_cb;
cbs.search_results_id = media_proxy_sctrl_search_results_id_cb;
#endif /* CONFIG_BT_OTS */
media_proxy_sctrl_register(&cbs);
initialized = true;
return 0;
}