| /* |
| * Copyright (c) 2022-2023 Nordic Semiconductor ASA |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/bluetooth/bluetooth.h> |
| #include <zephyr/bluetooth/audio/audio.h> |
| #include <zephyr/bluetooth/audio/bap.h> |
| #include <zephyr/bluetooth/audio/pacs.h> |
| #include <zephyr/sys/byteorder.h> |
| |
| BUILD_ASSERT(IS_ENABLED(CONFIG_SCAN_SELF) || IS_ENABLED(CONFIG_SCAN_OFFLOAD), |
| "Either SCAN_SELF or SCAN_OFFLOAD must be enabled"); |
| |
| #define SEM_TIMEOUT K_SECONDS(10) |
| #define BROADCAST_ASSISTANT_TIMEOUT K_SECONDS(120) /* 2 minutes */ |
| |
| #if defined(CONFIG_SCAN_SELF) |
| #define ADV_TIMEOUT K_SECONDS(CONFIG_SCAN_DELAY) |
| #else /* !CONFIG_SCAN_SELF */ |
| #define ADV_TIMEOUT K_FOREVER |
| #endif /* CONFIG_SCAN_SELF */ |
| |
| #define INVALID_BROADCAST_ID (BT_AUDIO_BROADCAST_ID_MAX + 1) |
| #define SYNC_RETRY_COUNT 6 /* similar to retries for connections */ |
| #define PA_SYNC_SKIP 5 |
| |
| static K_SEM_DEFINE(sem_connected, 0U, 1U); |
| static K_SEM_DEFINE(sem_disconnected, 0U, 1U); |
| static K_SEM_DEFINE(sem_broadcaster_found, 0U, 1U); |
| static K_SEM_DEFINE(sem_pa_synced, 0U, 1U); |
| static K_SEM_DEFINE(sem_base_received, 0U, 1U); |
| static K_SEM_DEFINE(sem_syncable, 0U, 1U); |
| static K_SEM_DEFINE(sem_pa_sync_lost, 0U, 1U); |
| static K_SEM_DEFINE(sem_broadcast_code_received, 0U, 1U); |
| static K_SEM_DEFINE(sem_pa_request, 0U, 1U); |
| static K_SEM_DEFINE(sem_past_request, 0U, 1U); |
| static K_SEM_DEFINE(sem_bis_sync_requested, 0U, 1U); |
| static K_SEM_DEFINE(sem_bis_synced, 0U, CONFIG_BT_BAP_BROADCAST_SNK_STREAM_COUNT); |
| |
| /* Sample assumes that we only have a single Scan Delegator receive state */ |
| static const struct bt_bap_scan_delegator_recv_state *req_recv_state; |
| static struct bt_bap_broadcast_sink *broadcast_sink; |
| static struct bt_le_scan_recv_info broadcaster_info; |
| static bt_addr_le_t broadcaster_addr; |
| static struct bt_le_per_adv_sync *pa_sync; |
| static uint32_t broadcaster_broadcast_id; |
| static struct bt_bap_stream streams[CONFIG_BT_BAP_BROADCAST_SNK_STREAM_COUNT]; |
| static struct bt_bap_stream *streams_p[ARRAY_SIZE(streams)]; |
| static struct bt_conn *broadcast_assistant_conn; |
| static struct bt_le_ext_adv *ext_adv; |
| |
| static const struct bt_audio_codec_cap codec_cap = BT_AUDIO_CODEC_CAP_LC3( |
| BT_AUDIO_CODEC_LC3_FREQ_16KHZ | BT_AUDIO_CODEC_LC3_FREQ_24KHZ, |
| BT_AUDIO_CODEC_LC3_DURATION_10, BT_AUDIO_CODEC_LC3_CHAN_COUNT_SUPPORT(1), 40u, 60u, 1u, |
| (BT_AUDIO_CONTEXT_TYPE_CONVERSATIONAL | BT_AUDIO_CONTEXT_TYPE_MEDIA)); |
| |
| /* Create a mask for the maximum BIS we can sync to using the number of streams |
| * we have. We add an additional 1 since the bis indexes start from 1 and not |
| * 0. |
| */ |
| static const uint32_t bis_index_mask = BIT_MASK(ARRAY_SIZE(streams) + 1U); |
| static uint32_t requested_bis_sync; |
| static uint32_t bis_index_bitfield; |
| static uint8_t sink_broadcast_code[BT_AUDIO_BROADCAST_CODE_SIZE]; |
| |
| static void stream_started_cb(struct bt_bap_stream *stream) |
| { |
| printk("Stream %p started\n", stream); |
| |
| k_sem_give(&sem_bis_synced); |
| } |
| |
| static void stream_stopped_cb(struct bt_bap_stream *stream, uint8_t reason) |
| { |
| int err; |
| |
| printk("Stream %p stopped with reason 0x%02X\n", stream, reason); |
| |
| err = k_sem_take(&sem_bis_synced, K_NO_WAIT); |
| if (err != 0) { |
| printk("Failed to take sem_bis_synced: %d\n", err); |
| } |
| } |
| |
| static void stream_recv_cb(struct bt_bap_stream *stream, |
| const struct bt_iso_recv_info *info, |
| struct net_buf *buf) |
| { |
| static uint32_t recv_cnt; |
| |
| if (info->flags & BT_ISO_FLAGS_ERROR) { |
| printk("ISO receive error\n"); |
| return; |
| } |
| |
| if (info->flags & BT_ISO_FLAGS_LOST) { |
| printk("ISO receive lost\n"); |
| return; |
| } |
| |
| recv_cnt++; |
| if ((recv_cnt % 1000U) == 0U) { |
| printk("Received %u total ISO packets\n", recv_cnt); |
| } |
| } |
| |
| static struct bt_bap_stream_ops stream_ops = { |
| .started = stream_started_cb, |
| .stopped = stream_stopped_cb, |
| .recv = stream_recv_cb |
| }; |
| |
| static void base_recv_cb(struct bt_bap_broadcast_sink *sink, const struct bt_bap_base *base) |
| { |
| uint32_t base_bis_index_bitfield = 0U; |
| |
| if (k_sem_count_get(&sem_base_received) != 0U) { |
| return; |
| } |
| |
| printk("Received BASE with %u subgroups from broadcast sink %p\n", |
| base->subgroup_count, sink); |
| |
| for (size_t i = 0U; i < base->subgroup_count; i++) { |
| for (size_t j = 0U; j < base->subgroups[i].bis_count; j++) { |
| const uint8_t index = base->subgroups[i].bis_data[j].index; |
| |
| base_bis_index_bitfield |= BIT(index); |
| } |
| } |
| |
| bis_index_bitfield = base_bis_index_bitfield & bis_index_mask; |
| |
| if (broadcast_assistant_conn == NULL) { |
| /* No broadcast assistant requesting anything */ |
| requested_bis_sync = BT_BAP_BIS_SYNC_NO_PREF; |
| k_sem_give(&sem_bis_sync_requested); |
| } |
| |
| k_sem_give(&sem_base_received); |
| } |
| |
| static void syncable_cb(struct bt_bap_broadcast_sink *sink, bool encrypted) |
| { |
| k_sem_give(&sem_syncable); |
| |
| if (!encrypted) { |
| /* Use the semaphore as a boolean */ |
| k_sem_reset(&sem_broadcast_code_received); |
| k_sem_give(&sem_broadcast_code_received); |
| } |
| } |
| |
| static struct bt_bap_broadcast_sink_cb broadcast_sink_cbs = { |
| .base_recv = base_recv_cb, |
| .syncable = syncable_cb, |
| }; |
| |
| static void pa_timer_handler(struct k_work *work) |
| { |
| if (req_recv_state != NULL) { |
| enum bt_bap_pa_state pa_state; |
| |
| if (req_recv_state->pa_sync_state == BT_BAP_PA_STATE_INFO_REQ) { |
| pa_state = BT_BAP_PA_STATE_NO_PAST; |
| } else { |
| pa_state = BT_BAP_PA_STATE_FAILED; |
| } |
| |
| bt_bap_scan_delegator_set_pa_state(req_recv_state->src_id, |
| pa_state); |
| } |
| |
| printk("PA timeout\n"); |
| } |
| |
| static K_WORK_DELAYABLE_DEFINE(pa_timer, pa_timer_handler); |
| |
| static uint16_t interval_to_sync_timeout(uint16_t pa_interval) |
| { |
| uint16_t pa_timeout; |
| |
| if (pa_interval == BT_BAP_PA_INTERVAL_UNKNOWN) { |
| /* Use maximum value to maximize chance of success */ |
| pa_timeout = BT_GAP_PER_ADV_MAX_TIMEOUT; |
| } else { |
| /* Ensure that the following calculation does not overflow silently */ |
| __ASSERT(SYNC_RETRY_COUNT < 10, |
| "SYNC_RETRY_COUNT shall be less than 10"); |
| |
| /* Add retries and convert to unit in 10's of ms */ |
| pa_timeout = ((uint32_t)pa_interval * SYNC_RETRY_COUNT) / 10; |
| |
| /* Enforce restraints */ |
| pa_timeout = CLAMP(pa_timeout, BT_GAP_PER_ADV_MIN_TIMEOUT, |
| BT_GAP_PER_ADV_MAX_TIMEOUT); |
| } |
| |
| return pa_timeout; |
| } |
| |
| static int pa_sync_past(struct bt_conn *conn, uint16_t pa_interval) |
| { |
| struct bt_le_per_adv_sync_transfer_param param = { 0 }; |
| int err; |
| |
| param.skip = PA_SYNC_SKIP; |
| param.timeout = interval_to_sync_timeout(pa_interval); |
| |
| err = bt_le_per_adv_sync_transfer_subscribe(conn, ¶m); |
| if (err != 0) { |
| printk("Could not do PAST subscribe: %d\n", err); |
| } else { |
| printk("Syncing with PAST: %d\n", err); |
| (void)k_work_reschedule(&pa_timer, K_MSEC(param.timeout * 10)); |
| } |
| |
| return err; |
| } |
| |
| static int pa_sync_req_cb(struct bt_conn *conn, |
| const struct bt_bap_scan_delegator_recv_state *recv_state, |
| bool past_avail, uint16_t pa_interval) |
| { |
| int err; |
| |
| req_recv_state = recv_state; |
| |
| if (recv_state->pa_sync_state == BT_BAP_PA_STATE_SYNCED || |
| recv_state->pa_sync_state == BT_BAP_PA_STATE_INFO_REQ) { |
| /* Already syncing */ |
| /* TODO: Terminate existing sync and then sync to new?*/ |
| return -1; |
| } |
| |
| if (IS_ENABLED(CONFIG_BT_PER_ADV_SYNC_TRANSFER_RECEIVER) && past_avail) { |
| err = pa_sync_past(conn, pa_interval); |
| k_sem_give(&sem_past_request); |
| } else { |
| /* start scan */ |
| err = 0; |
| } |
| |
| k_sem_give(&sem_pa_request); |
| |
| return err; |
| } |
| |
| static int pa_sync_term_req_cb(struct bt_conn *conn, |
| const struct bt_bap_scan_delegator_recv_state *recv_state) |
| { |
| int err; |
| |
| req_recv_state = recv_state; |
| |
| err = bt_bap_broadcast_sink_delete(broadcast_sink); |
| if (err != 0) { |
| return err; |
| } |
| |
| broadcast_sink = NULL; |
| |
| return 0; |
| } |
| |
| static void broadcast_code_cb(struct bt_conn *conn, |
| const struct bt_bap_scan_delegator_recv_state *recv_state, |
| const uint8_t broadcast_code[BT_AUDIO_BROADCAST_CODE_SIZE]) |
| { |
| printk("Broadcast code received for %p\n", recv_state); |
| |
| req_recv_state = recv_state; |
| |
| (void)memcpy(sink_broadcast_code, broadcast_code, BT_AUDIO_BROADCAST_CODE_SIZE); |
| |
| /* Use the semaphore as a boolean */ |
| k_sem_reset(&sem_broadcast_code_received); |
| k_sem_give(&sem_broadcast_code_received); |
| } |
| |
| static int bis_sync_req_cb(struct bt_conn *conn, |
| const struct bt_bap_scan_delegator_recv_state *recv_state, |
| const uint32_t bis_sync_req[BT_BAP_SCAN_DELEGATOR_MAX_SUBGROUPS]) |
| { |
| const bool bis_synced = k_sem_count_get(&sem_bis_synced) > 0U; |
| |
| printk("BIS sync request received for %p: 0x%08x\n", |
| recv_state, bis_sync_req[0]); |
| |
| /* We only care about a single subgroup in this sample */ |
| if (bis_synced && requested_bis_sync != bis_sync_req[0]) { |
| /* If the BIS sync request is received while we are already |
| * synced, it means that the requested BIS sync has changed. |
| */ |
| int err; |
| |
| /* The stream stopped callback will be called as part of this, |
| * and we do not need to wait for any events from the |
| * controller. Thus, when this returns, the `sem_bis_synced` |
| * is back to 0. |
| */ |
| err = bt_bap_broadcast_sink_stop(broadcast_sink); |
| if (err != 0) { |
| printk("Failed to stop Broadcast Sink: %d\n", err); |
| |
| return err; |
| } |
| } |
| |
| requested_bis_sync = bis_sync_req[0]; |
| broadcaster_broadcast_id = recv_state->broadcast_id; |
| if (bis_sync_req[0] != 0) { |
| k_sem_give(&sem_bis_sync_requested); |
| } |
| |
| return 0; |
| } |
| |
| static struct bt_bap_scan_delegator_cb scan_delegator_cbs = { |
| .pa_sync_req = pa_sync_req_cb, |
| .pa_sync_term_req = pa_sync_term_req_cb, |
| .broadcast_code = broadcast_code_cb, |
| .bis_sync_req = bis_sync_req_cb, |
| }; |
| |
| static void connected(struct bt_conn *conn, uint8_t err) |
| { |
| char addr[BT_ADDR_LE_STR_LEN]; |
| |
| bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr)); |
| |
| if (err != 0U) { |
| printk("Failed to connect to %s (%u)\n", addr, err); |
| |
| broadcast_assistant_conn = NULL; |
| return; |
| } |
| |
| printk("Connected: %s\n", addr); |
| broadcast_assistant_conn = bt_conn_ref(conn); |
| |
| k_sem_give(&sem_connected); |
| } |
| |
| static void disconnected(struct bt_conn *conn, uint8_t reason) |
| { |
| char addr[BT_ADDR_LE_STR_LEN]; |
| |
| if (conn != broadcast_assistant_conn) { |
| return; |
| } |
| |
| bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr)); |
| |
| printk("Disconnected: %s (reason 0x%02x)\n", addr, reason); |
| |
| bt_conn_unref(broadcast_assistant_conn); |
| broadcast_assistant_conn = NULL; |
| |
| k_sem_give(&sem_disconnected); |
| } |
| |
| BT_CONN_CB_DEFINE(conn_callbacks) = { |
| .connected = connected, |
| .disconnected = disconnected, |
| }; |
| |
| static struct bt_pacs_cap cap = { |
| .codec_cap = &codec_cap, |
| }; |
| |
| static bool scan_check_and_sync_broadcast(struct bt_data *data, void *user_data) |
| { |
| const struct bt_le_scan_recv_info *info = user_data; |
| char le_addr[BT_ADDR_LE_STR_LEN]; |
| struct bt_uuid_16 adv_uuid; |
| uint32_t broadcast_id; |
| |
| if (data->type != BT_DATA_SVC_DATA16) { |
| return true; |
| } |
| |
| if (data->data_len < BT_UUID_SIZE_16 + BT_AUDIO_BROADCAST_ID_SIZE) { |
| return true; |
| } |
| |
| if (!bt_uuid_create(&adv_uuid.uuid, data->data, BT_UUID_SIZE_16)) { |
| return true; |
| } |
| |
| if (bt_uuid_cmp(&adv_uuid.uuid, BT_UUID_BROADCAST_AUDIO)) { |
| return true; |
| } |
| |
| broadcast_id = sys_get_le24(data->data + BT_UUID_SIZE_16); |
| |
| bt_addr_le_to_str(info->addr, le_addr, sizeof(le_addr)); |
| |
| printk("Found broadcaster with ID 0x%06X and addr %s and sid 0x%02X\n", broadcast_id, |
| le_addr, info->sid); |
| |
| if (broadcast_assistant_conn == NULL) { |
| /* Not requested by Broadcast Assistant */ |
| k_sem_give(&sem_broadcaster_found); |
| } else if (req_recv_state != NULL && |
| bt_addr_le_eq(info->addr, &req_recv_state->addr) && |
| info->sid == req_recv_state->adv_sid && |
| broadcast_id == req_recv_state->broadcast_id) { |
| k_sem_give(&sem_broadcaster_found); |
| } |
| |
| /* Store info for PA sync parameters */ |
| memcpy(&broadcaster_info, info, sizeof(broadcaster_info)); |
| bt_addr_le_copy(&broadcaster_addr, info->addr); |
| broadcaster_broadcast_id = broadcast_id; |
| |
| /* Stop parsing */ |
| return false; |
| } |
| |
| static void broadcast_scan_recv(const struct bt_le_scan_recv_info *info, struct net_buf_simple *ad) |
| { |
| if (info->interval != 0U) { |
| bt_data_parse(ad, scan_check_and_sync_broadcast, (void *)info); |
| } |
| } |
| |
| static struct bt_le_scan_cb bap_scan_cb = { |
| .recv = broadcast_scan_recv, |
| }; |
| |
| static void bap_pa_sync_synced_cb(struct bt_le_per_adv_sync *sync, |
| struct bt_le_per_adv_sync_synced_info *info) |
| { |
| if (sync == pa_sync) { |
| printk("PA sync %p synced for broadcast sink with broadcast ID 0x%06X\n", sync, |
| broadcaster_broadcast_id); |
| |
| k_sem_give(&sem_pa_synced); |
| } |
| } |
| |
| static void bap_pa_sync_terminated_cb(struct bt_le_per_adv_sync *sync, |
| const struct bt_le_per_adv_sync_term_info *info) |
| { |
| if (sync == pa_sync) { |
| printk("PA sync %p lost with reason %u\n", sync, info->reason); |
| pa_sync = NULL; |
| |
| k_sem_give(&sem_pa_sync_lost); |
| } |
| } |
| |
| static struct bt_le_per_adv_sync_cb bap_pa_sync_cb = { |
| .synced = bap_pa_sync_synced_cb, |
| .term = bap_pa_sync_terminated_cb, |
| }; |
| |
| static int init(void) |
| { |
| int err; |
| |
| err = bt_enable(NULL); |
| if (err) { |
| printk("Bluetooth enable failed (err %d)\n", err); |
| return err; |
| } |
| |
| printk("Bluetooth initialized\n"); |
| |
| err = bt_pacs_cap_register(BT_AUDIO_DIR_SINK, &cap); |
| if (err) { |
| printk("Capability register failed (err %d)\n", err); |
| return err; |
| } |
| |
| bt_bap_broadcast_sink_register_cb(&broadcast_sink_cbs); |
| bt_bap_scan_delegator_register_cb(&scan_delegator_cbs); |
| bt_le_per_adv_sync_cb_register(&bap_pa_sync_cb); |
| bt_le_scan_cb_register(&bap_scan_cb); |
| |
| for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) { |
| streams[i].ops = &stream_ops; |
| } |
| |
| return 0; |
| } |
| |
| static int reset(void) |
| { |
| int err; |
| |
| bis_index_bitfield = 0U; |
| requested_bis_sync = 0U; |
| req_recv_state = NULL; |
| (void)memset(sink_broadcast_code, 0, sizeof(sink_broadcast_code)); |
| (void)memset(&broadcaster_info, 0, sizeof(broadcaster_info)); |
| (void)memset(&broadcaster_addr, 0, sizeof(broadcaster_addr)); |
| broadcaster_broadcast_id = INVALID_BROADCAST_ID; |
| |
| if (broadcast_sink != NULL) { |
| err = bt_bap_broadcast_sink_delete(broadcast_sink); |
| if (err) { |
| printk("Deleting broadcast sink failed (err %d)\n", err); |
| |
| return err; |
| } |
| |
| broadcast_sink = NULL; |
| } |
| |
| if (pa_sync != NULL) { |
| bt_le_per_adv_sync_delete(pa_sync); |
| if (err) { |
| printk("Deleting PA sync failed (err %d)\n", err); |
| |
| return err; |
| } |
| |
| pa_sync = NULL; |
| } |
| |
| if (IS_ENABLED(CONFIG_SCAN_OFFLOAD)) { |
| if (broadcast_assistant_conn != NULL) { |
| err = bt_conn_disconnect(broadcast_assistant_conn, |
| BT_HCI_ERR_REMOTE_USER_TERM_CONN); |
| if (err) { |
| printk("Disconnecting Broadcast Assistant failed (err %d)\n", |
| err); |
| |
| return err; |
| } |
| |
| err = k_sem_take(&sem_disconnected, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("Failed to take sem_disconnected: %d\n", err); |
| |
| return err; |
| } |
| } else if (ext_adv != NULL) { /* advertising still running */ |
| err = bt_le_ext_adv_stop(ext_adv); |
| if (err) { |
| printk("Stopping advertising set failed (err %d)\n", |
| err); |
| |
| return err; |
| } |
| |
| err = bt_le_ext_adv_delete(ext_adv); |
| if (err) { |
| printk("Deleting advertising set failed (err %d)\n", |
| err); |
| |
| return err; |
| } |
| |
| ext_adv = NULL; |
| } |
| |
| k_sem_reset(&sem_connected); |
| k_sem_reset(&sem_disconnected); |
| k_sem_reset(&sem_pa_request); |
| k_sem_reset(&sem_past_request); |
| } |
| |
| k_sem_reset(&sem_broadcaster_found); |
| k_sem_reset(&sem_pa_synced); |
| k_sem_reset(&sem_base_received); |
| k_sem_reset(&sem_syncable); |
| k_sem_reset(&sem_pa_sync_lost); |
| k_sem_reset(&sem_broadcast_code_received); |
| k_sem_reset(&sem_bis_sync_requested); |
| k_sem_reset(&sem_bis_synced); |
| |
| return 0; |
| } |
| |
| static int start_adv(void) |
| { |
| const struct bt_data ad[] = { |
| BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)), |
| BT_DATA_BYTES(BT_DATA_UUID16_ALL, |
| BT_UUID_16_ENCODE(BT_UUID_BASS_VAL), |
| BT_UUID_16_ENCODE(BT_UUID_PACS_VAL)), |
| }; |
| int err; |
| |
| /* Create a non-connectable non-scannable advertising set */ |
| err = bt_le_ext_adv_create(BT_LE_EXT_ADV_CONN_NAME, NULL, &ext_adv); |
| if (err != 0) { |
| printk("Failed to create advertising set (err %d)\n", err); |
| |
| return err; |
| } |
| |
| err = bt_le_ext_adv_set_data(ext_adv, ad, ARRAY_SIZE(ad), NULL, 0); |
| if (err != 0) { |
| printk("Failed to set advertising data (err %d)\n", err); |
| |
| return err; |
| } |
| |
| err = bt_le_ext_adv_start(ext_adv, BT_LE_EXT_ADV_START_DEFAULT); |
| if (err != 0) { |
| printk("Failed to start advertising set (err %d)\n", err); |
| |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int stop_adv(void) |
| { |
| int err; |
| |
| err = bt_le_ext_adv_stop(ext_adv); |
| if (err != 0) { |
| printk("Failed to stop advertising set (err %d)\n", err); |
| |
| return err; |
| } |
| |
| err = bt_le_ext_adv_delete(ext_adv); |
| if (err != 0) { |
| printk("Failed to delete advertising set (err %d)\n", err); |
| |
| return err; |
| } |
| |
| ext_adv = NULL; |
| |
| return 0; |
| } |
| |
| static int pa_sync_create(void) |
| { |
| struct bt_le_per_adv_sync_param create_params = {0}; |
| |
| bt_addr_le_copy(&create_params.addr, &broadcaster_addr); |
| create_params.options = BT_LE_PER_ADV_SYNC_OPT_FILTER_DUPLICATE; |
| create_params.sid = broadcaster_info.sid; |
| create_params.skip = PA_SYNC_SKIP; |
| create_params.timeout = interval_to_sync_timeout(broadcaster_info.interval); |
| |
| return bt_le_per_adv_sync_create(&create_params, &pa_sync); |
| } |
| |
| int main(void) |
| { |
| int err; |
| |
| err = init(); |
| if (err) { |
| printk("Init failed (err %d)\n", err); |
| return 0; |
| } |
| |
| for (size_t i = 0U; i < ARRAY_SIZE(streams_p); i++) { |
| streams_p[i] = &streams[i]; |
| } |
| |
| while (true) { |
| err = reset(); |
| if (err != 0) { |
| printk("Resetting failed: %d - Aborting\n", err); |
| |
| return 0; |
| } |
| |
| if (IS_ENABLED(CONFIG_SCAN_OFFLOAD)) { |
| printk("Starting advertising\n"); |
| err = start_adv(); |
| if (err != 0) { |
| printk("Unable to start advertising connectable: %d\n", |
| err); |
| |
| return 0; |
| } |
| |
| printk("Waiting for Broadcast Assistant\n"); |
| err = k_sem_take(&sem_connected, ADV_TIMEOUT); |
| if (err != 0) { |
| printk("No Broadcast Assistant connected\n"); |
| |
| err = stop_adv(); |
| if (err != 0) { |
| printk("Unable to stop advertising: %d\n", |
| err); |
| |
| return 0; |
| } |
| } else { |
| /* Wait for the PA request to determine if we |
| * should start scanning, or wait for PAST |
| */ |
| err = k_sem_take(&sem_pa_request, |
| BROADCAST_ASSISTANT_TIMEOUT); |
| if (err != 0) { |
| printk("sem_pa_request timed out, resetting\n"); |
| continue; |
| } |
| |
| if (k_sem_take(&sem_past_request, K_NO_WAIT) == 0) { |
| goto wait_for_pa_sync; |
| } /* else continue with scanning below */ |
| } |
| } |
| |
| printk("Scanning for broadcast sources\n"); |
| err = bt_le_scan_start(BT_LE_SCAN_ACTIVE, NULL); |
| if (err != 0 && err != -EALREADY) { |
| printk("Unable to start scan for broadcast sources: %d\n", |
| err); |
| return 0; |
| } |
| |
| err = k_sem_take(&sem_broadcaster_found, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_broadcaster_found timed out, resetting\n"); |
| continue; |
| } |
| printk("Broadcast source found, waiting for PA sync\n"); |
| |
| err = bt_le_scan_stop(); |
| if (err != 0) { |
| printk("bt_le_scan_stop failed with %d, resetting\n", err); |
| continue; |
| } |
| |
| printk("Attempting to PA sync to the broadcaster with id 0x%06X\n", |
| broadcaster_broadcast_id); |
| err = pa_sync_create(); |
| if (err != 0) { |
| printk("Could not create Broadcast PA sync: %d, resetting\n", err); |
| continue; |
| } |
| |
| wait_for_pa_sync: |
| printk("Waiting for PA synced\n"); |
| err = k_sem_take(&sem_pa_synced, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_pa_synced timed out, resetting\n"); |
| continue; |
| } |
| |
| printk("Broadcast source PA synced, creating Broadcast Sink\n"); |
| err = bt_bap_broadcast_sink_create(pa_sync, broadcaster_broadcast_id, |
| &broadcast_sink); |
| if (err != 0) { |
| printk("Failed to create broadcast sink: %d\n", err); |
| continue; |
| } |
| |
| printk("Broadcast Sink created, waiting for BASE\n"); |
| err = k_sem_take(&sem_base_received, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_base_received timed out, resetting\n"); |
| continue; |
| } |
| printk("BASE received, waiting for syncable\n"); |
| |
| err = k_sem_take(&sem_syncable, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_syncable timed out, resetting\n"); |
| continue; |
| } |
| |
| /* sem_broadcast_code_received is also given if the |
| * broadcast is not encrypted |
| */ |
| printk("Waiting for broadcast code OK\n"); |
| err = k_sem_take(&sem_broadcast_code_received, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_syncable timed out, resetting\n"); |
| continue; |
| } |
| |
| printk("Waiting for BIS sync request\n"); |
| err = k_sem_take(&sem_bis_sync_requested, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_syncable timed out, resetting\n"); |
| continue; |
| } |
| |
| printk("Syncing to broadcast\n"); |
| err = bt_bap_broadcast_sink_sync(broadcast_sink, |
| bis_index_bitfield & requested_bis_sync, |
| streams_p, sink_broadcast_code); |
| if (err != 0) { |
| printk("Unable to sync to broadcast source: %d\n", err); |
| return 0; |
| } |
| |
| printk("Waiting for BIG sync\n"); |
| err = k_sem_take(&sem_bis_synced, SEM_TIMEOUT); |
| if (err != 0) { |
| printk("sem_bis_synced timed out, resetting\n"); |
| continue; |
| } |
| |
| printk("Waiting for PA disconnected\n"); |
| k_sem_take(&sem_pa_sync_lost, K_FOREVER); |
| } |
| return 0; |
| } |