8be6db67fc
Refactors teh BIS bitfield values used for ISO and BAP. Previously BIT(1) meant BIS index 1, which was a Zephyr choice in the early days of ISO, as the BT Core spec did not use a bitfield for BIS indexes. Later the BASS specification came along and defined that BIT(0) meant BIS index 1, which meant that we had to shift BIS bitfields between BAP and ISO. This commit refactors the ISO layer to use BIT(0) for Index 1 now, which means that there is no longer a need for conversion between the BAP and ISO layers, and that we can use a value range defined by a BT Core spec (BASS). Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/** @file
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* @brief Internal header for Bluetooth BAP.
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*/
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/*
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* Copyright (c) 2019 Bose Corporation
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* Copyright (c) 2021-2023 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <zephyr/bluetooth/audio/audio.h>
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#include <zephyr/bluetooth/audio/bap.h>
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#include <zephyr/bluetooth/addr.h>
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#include <zephyr/bluetooth/conn.h>
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#include <zephyr/bluetooth/iso.h>
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#include <zephyr/sys/util_macro.h>
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#include <zephyr/types.h>
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#define BT_BAP_BASS_SCAN_STATE_NOT_SCANNING 0x00
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#define BT_BAP_BASS_SCAN_STATE_SCANNING 0x01
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#define BT_BAP_BASS_OP_SCAN_STOP 0x00
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#define BT_BAP_BASS_OP_SCAN_START 0x01
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#define BT_BAP_BASS_OP_ADD_SRC 0x02
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#define BT_BAP_BASS_OP_MOD_SRC 0x03
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#define BT_BAP_BASS_OP_BROADCAST_CODE 0x04
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#define BT_BAP_BASS_OP_REM_SRC 0x05
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#define BT_BAP_BASS_SCAN_STATE_IDLE 0x00
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#define BT_BAP_BASS_SCAN_STATE_SCANNING 0x01
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#define BT_BAP_BASS_SCAN_STATE_FAILED 0x02
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#define BT_BAP_BASS_SCAN_STATE_SYNCED 0x03
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#define BT_BAP_BASS_PA_REQ_NO_SYNC 0x00
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#define BT_BAP_BASS_PA_REQ_SYNC_PAST 0x01
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#define BT_BAP_BASS_PA_REQ_SYNC 0x02
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#define BT_BAP_BASS_VALID_OPCODE(opcode) ((opcode) <= BT_BAP_BASS_OP_REM_SRC)
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struct bt_bap_bass_cp_scan_stop {
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uint8_t opcode;
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} __packed;
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struct bt_bap_bass_cp_scan_start {
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uint8_t opcode;
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} __packed;
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struct bt_bap_bass_cp_subgroup {
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uint32_t bis_sync;
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uint8_t metadata_len;
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uint8_t metadata[0];
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} __packed;
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struct bt_bap_bass_cp_add_src {
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uint8_t opcode;
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bt_addr_le_t addr;
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uint8_t adv_sid;
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uint8_t broadcast_id[BT_AUDIO_BROADCAST_ID_SIZE];
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uint8_t pa_sync;
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uint16_t pa_interval;
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uint8_t num_subgroups;
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struct bt_bap_bass_cp_subgroup subgroups[0];
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} __packed;
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struct bt_bap_bass_cp_mod_src {
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uint8_t opcode;
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uint8_t src_id;
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uint8_t pa_sync;
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uint16_t pa_interval;
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uint8_t num_subgroups;
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struct bt_bap_bass_cp_subgroup subgroups[0];
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} __packed;
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struct bt_bap_bass_cp_broadcase_code {
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uint8_t opcode;
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uint8_t src_id;
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uint8_t broadcast_code[16];
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} __packed;
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struct bt_bap_bass_cp_rem_src {
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uint8_t opcode;
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uint8_t src_id;
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} __packed;
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union bt_bap_bass_cp {
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uint8_t opcode;
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struct bt_bap_bass_cp_scan_stop scan_stop;
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struct bt_bap_bass_cp_scan_start scan_start;
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struct bt_bap_bass_cp_add_src add_src;
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struct bt_bap_bass_cp_mod_src mod_src;
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struct bt_bap_bass_cp_broadcase_code broadcast_code;
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struct bt_bap_bass_cp_rem_src rem_src;
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};
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static inline const char *bt_bap_pa_state_str(uint8_t state)
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{
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switch (state) {
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case BT_BAP_PA_STATE_NOT_SYNCED:
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return "Not synchronized to PA";
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case BT_BAP_PA_STATE_INFO_REQ:
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return "SyncInfo Request";
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case BT_BAP_PA_STATE_SYNCED:
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return "Synchronized to PA";
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case BT_BAP_PA_STATE_FAILED:
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return "Failed to synchronize to PA";
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case BT_BAP_PA_STATE_NO_PAST:
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return "No PAST";
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default:
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return "unknown state";
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}
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}
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static inline const char *bt_bap_big_enc_state_str(uint8_t state)
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{
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switch (state) {
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case BT_BAP_BIG_ENC_STATE_NO_ENC:
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return "Not encrypted";
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case BT_BAP_BIG_ENC_STATE_BCODE_REQ:
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return "Broadcast_Code required";
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case BT_BAP_BIG_ENC_STATE_DEC:
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return "Decrypting";
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case BT_BAP_BIG_ENC_STATE_BAD_CODE:
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return "Bad_Code (incorrect encryption key)";
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default:
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return "unknown state";
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}
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}
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static inline bool valid_bis_syncs(uint32_t bis_sync)
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{
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if (bis_sync == BT_BAP_BIS_SYNC_NO_PREF) {
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return true;
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}
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if (bis_sync > BIT_MASK(BT_ISO_MAX_GROUP_ISO_COUNT)) {
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return false;
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}
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return true;
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}
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