1 /** @file 2 * @brief Internal header for Bluetooth BAP. 3 */ 4 5 /* 6 * Copyright (c) 2019 Bose Corporation 7 * Copyright (c) 2021-2023 Nordic Semiconductor ASA 8 * 9 * SPDX-License-Identifier: Apache-2.0 10 */ 11 12 #include <stdbool.h> 13 #include <stdint.h> 14 15 #include <zephyr/bluetooth/audio/audio.h> 16 #include <zephyr/bluetooth/audio/bap.h> 17 #include <zephyr/bluetooth/addr.h> 18 #include <zephyr/bluetooth/conn.h> 19 #include <zephyr/bluetooth/iso.h> 20 #include <zephyr/sys/util_macro.h> 21 #include <zephyr/types.h> 22 23 #define BT_BAP_BASS_SCAN_STATE_NOT_SCANNING 0x00 24 #define BT_BAP_BASS_SCAN_STATE_SCANNING 0x01 25 26 #define BT_BAP_BASS_OP_SCAN_STOP 0x00 27 #define BT_BAP_BASS_OP_SCAN_START 0x01 28 #define BT_BAP_BASS_OP_ADD_SRC 0x02 29 #define BT_BAP_BASS_OP_MOD_SRC 0x03 30 #define BT_BAP_BASS_OP_BROADCAST_CODE 0x04 31 #define BT_BAP_BASS_OP_REM_SRC 0x05 32 33 #define BT_BAP_BASS_SCAN_STATE_IDLE 0x00 34 #define BT_BAP_BASS_SCAN_STATE_SCANNING 0x01 35 #define BT_BAP_BASS_SCAN_STATE_FAILED 0x02 36 #define BT_BAP_BASS_SCAN_STATE_SYNCED 0x03 37 38 #define BT_BAP_BASS_PA_REQ_NO_SYNC 0x00 39 #define BT_BAP_BASS_PA_REQ_SYNC_PAST 0x01 40 #define BT_BAP_BASS_PA_REQ_SYNC 0x02 41 42 #define BT_BAP_BASS_VALID_OPCODE(opcode) ((opcode) <= BT_BAP_BASS_OP_REM_SRC) 43 44 struct bt_bap_bass_cp_scan_stop { 45 uint8_t opcode; 46 } __packed; 47 48 struct bt_bap_bass_cp_scan_start { 49 uint8_t opcode; 50 } __packed; 51 52 struct bt_bap_bass_cp_subgroup { 53 uint32_t bis_sync; 54 uint8_t metadata_len; 55 uint8_t metadata[0]; 56 } __packed; 57 58 struct bt_bap_bass_cp_add_src { 59 uint8_t opcode; 60 bt_addr_le_t addr; 61 uint8_t adv_sid; 62 uint8_t broadcast_id[BT_AUDIO_BROADCAST_ID_SIZE]; 63 uint8_t pa_sync; 64 uint16_t pa_interval; 65 uint8_t num_subgroups; 66 struct bt_bap_bass_cp_subgroup subgroups[0]; 67 } __packed; 68 69 struct bt_bap_bass_cp_mod_src { 70 uint8_t opcode; 71 uint8_t src_id; 72 uint8_t pa_sync; 73 uint16_t pa_interval; 74 uint8_t num_subgroups; 75 struct bt_bap_bass_cp_subgroup subgroups[0]; 76 } __packed; 77 78 struct bt_bap_bass_cp_broadcase_code { 79 uint8_t opcode; 80 uint8_t src_id; 81 uint8_t broadcast_code[BT_ISO_BROADCAST_CODE_SIZE]; 82 } __packed; 83 84 struct bt_bap_bass_cp_rem_src { 85 uint8_t opcode; 86 uint8_t src_id; 87 } __packed; 88 89 union bt_bap_bass_cp { 90 uint8_t opcode; 91 struct bt_bap_bass_cp_scan_stop scan_stop; 92 struct bt_bap_bass_cp_scan_start scan_start; 93 struct bt_bap_bass_cp_add_src add_src; 94 struct bt_bap_bass_cp_mod_src mod_src; 95 struct bt_bap_bass_cp_broadcase_code broadcast_code; 96 struct bt_bap_bass_cp_rem_src rem_src; 97 }; 98 bt_bap_pa_state_str(uint8_t state)99static inline const char *bt_bap_pa_state_str(uint8_t state) 100 { 101 switch (state) { 102 case BT_BAP_PA_STATE_NOT_SYNCED: 103 return "Not synchronized to PA"; 104 case BT_BAP_PA_STATE_INFO_REQ: 105 return "SyncInfo Request"; 106 case BT_BAP_PA_STATE_SYNCED: 107 return "Synchronized to PA"; 108 case BT_BAP_PA_STATE_FAILED: 109 return "Failed to synchronize to PA"; 110 case BT_BAP_PA_STATE_NO_PAST: 111 return "No PAST"; 112 default: 113 return "unknown state"; 114 } 115 } 116 bt_bap_big_enc_state_str(uint8_t state)117static inline const char *bt_bap_big_enc_state_str(uint8_t state) 118 { 119 switch (state) { 120 case BT_BAP_BIG_ENC_STATE_NO_ENC: 121 return "Not encrypted"; 122 case BT_BAP_BIG_ENC_STATE_BCODE_REQ: 123 return "Broadcast_Code required"; 124 case BT_BAP_BIG_ENC_STATE_DEC: 125 return "Decrypting"; 126 case BT_BAP_BIG_ENC_STATE_BAD_CODE: 127 return "Bad_Code (incorrect encryption key)"; 128 default: 129 return "unknown state"; 130 } 131 } 132 valid_bis_syncs(uint32_t bis_sync)133static inline bool valid_bis_syncs(uint32_t bis_sync) 134 { 135 if (bis_sync == BT_BAP_BIS_SYNC_NO_PREF) { 136 return true; 137 } 138 139 if (bis_sync > BIT_MASK(BT_ISO_MAX_GROUP_ISO_COUNT)) { 140 return false; 141 } 142 143 return true; 144 } 145
