1 /* @file
2 * @brief Internal APIs for LE Audio
3 *
4 * Copyright (c) 2022 Codecoup
5 *
6 * SPDX-License-Identifier: Apache-2.0
7 */
8
9 #include <zephyr/bluetooth/gatt.h>
10 #include <zephyr/bluetooth/audio/audio.h>
11
12 #define BT_AUDIO_NOTIFY_RETRY_DELAY_US ((CONFIG_BT_AUDIO_NOTIFY_RETRY_DELAY) * 1250U)
13
14 /** @brief LE Audio Attribute User Data. */
15 struct bt_audio_attr_user_data {
16 /** Attribute read callback */
17 ssize_t (*read)(struct bt_conn *conn, const struct bt_gatt_attr *attr,
18 void *buf, uint16_t len, uint16_t offset);
19
20 /** Attribute write callback */
21 ssize_t (*write)(struct bt_conn *conn, const struct bt_gatt_attr *attr,
22 const void *buf, uint16_t len, uint16_t offset,
23 uint8_t flags);
24
25 /** Attribute user data */
26 void *user_data;
27 };
28
29 /** LE Audio Read Characteristic value helper. */
30 ssize_t bt_audio_read_chrc(struct bt_conn *conn, const struct bt_gatt_attr *attr,
31 void *buf, uint16_t len, uint16_t offset);
32
33 /** LE Audio Write Characteristic value helper. */
34 ssize_t bt_audio_write_chrc(struct bt_conn *conn, const struct bt_gatt_attr *attr,
35 const void *buf, uint16_t len, uint16_t offset, uint8_t flags);
36
37 #define BT_AUDIO_ATTR_USER_DATA_INIT(_read, _write, _user_data) \
38 { \
39 .read = _read, \
40 .write = _write, \
41 .user_data = _user_data, \
42 }
43
44 /** Helper to define LE Audio characteristic. */
45 #define BT_AUDIO_CHRC(_uuid, _props, _perm, _read, _write, _user_data) \
46 BT_GATT_CHARACTERISTIC(_uuid, _props, _perm, bt_audio_read_chrc, bt_audio_write_chrc, \
47 ((struct bt_audio_attr_user_data[]) { \
48 BT_AUDIO_ATTR_USER_DATA_INIT(_read, _write, _user_data), \
49 }))
50
51 #define BT_AUDIO_CHRC_USER_DATA(_attr) \
52 (((struct bt_audio_attr_user_data *)(_attr)->user_data)->user_data)
53
54 /** LE Audio Write CCCD value helper. */
55 ssize_t bt_audio_ccc_cfg_write(struct bt_conn *conn, const struct bt_gatt_attr *attr,
56 uint16_t value);
57
58 /** Helper to define LE Audio CCC descriptor. */
59 #define BT_AUDIO_CCC(_changed) \
60 BT_GATT_CCC_MANAGED(((struct _bt_gatt_ccc[]) \
61 {BT_GATT_CCC_INITIALIZER(_changed, bt_audio_ccc_cfg_write, NULL)}), \
62 (BT_GATT_PERM_READ | BT_GATT_PERM_WRITE_ENCRYPT))
63
bt_audio_dir_str(enum bt_audio_dir dir)64 static inline const char *bt_audio_dir_str(enum bt_audio_dir dir)
65 {
66 switch (dir) {
67 case BT_AUDIO_DIR_SINK:
68 return "sink";
69 case BT_AUDIO_DIR_SOURCE:
70 return "source";
71 }
72
73 return "Unknown";
74 }
75
