1 /* 2 * Copyright (c) 2024 Nordic Semiconductor ASA 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <stdint.h> 8 9 #include <zephyr/bluetooth/audio/audio.h> 10 #include <zephyr/bluetooth/audio/cap.h> 11 #include <zephyr/bluetooth/conn.h> 12 #include <zephyr/kernel.h> 13 14 #define SINK_CONTEXT BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED 15 #define SOURCE_CONTEXT BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED 16 17 /** Struct to contain information for a specific peer (CAP) device */ 18 struct peer_config { 19 /** Stream for the source endpoint */ 20 struct bt_cap_stream source_stream; 21 /** Stream for the sink endpoint */ 22 struct bt_cap_stream sink_stream; 23 /** Semaphore to help wait for a release operation if the source stream is not idle */ 24 struct k_sem source_stream_sem; 25 /** Semaphore to help wait for a release operation if the sink stream is not idle */ 26 struct k_sem sink_stream_sem; 27 /** ACL connection object for the peer device */ 28 struct bt_conn *conn; 29 /** Current sequence number for TX */ 30 uint16_t tx_seq_num; 31 }; 32 33 /** 34 * @brief Initialize the unicast part of the CAP Acceptor 35 * 36 * @param peer Pointer to the specific peer to initialize the CAP Acceptor for 37 * 38 * @retval 0 if success 39 * @retval -ENOEXEC if callbacks failed to be registered 40 */ 41 int init_cap_acceptor_unicast(struct peer_config *peer); 42 43 /** 44 * @brief Initialize the unicast part of the CAP Acceptor 45 * 46 * @retval 0 if success 47 * @retval -ENOEXEC if callbacks failed to be registered 48 */ 49 int init_cap_acceptor_broadcast(void); 50 51 /** 52 * @brief Request to allocate a CAP stream 53 * 54 * @param dir Audio direction of the stream to allocate 55 * 56 * @retval Pointer to the allocated CAP stream 57 * @retval NULL if no more CAP streams for the @p dir could be allocated 58 */ 59 struct bt_cap_stream *stream_alloc(enum bt_audio_dir dir); 60 61 /** 62 * Notify about a released stream 63 64 * This is used to handle some state checks in the main.c file. 65 * 66 * @param cap_stream Pointer to the stream that was released 67 */ 68 void stream_released(const struct bt_cap_stream *cap_stream); 69
