| /* |
| * 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/bap_lc3_preset.h> |
| |
| /* When BROADCAST_ENQUEUE_COUNT > 1 we can enqueue enough buffers to ensure that |
| * the controller is never idle |
| */ |
| #define BROADCAST_ENQUEUE_COUNT 2U |
| #define TOTAL_BUF_NEEDED (BROADCAST_ENQUEUE_COUNT * CONFIG_BT_BAP_BROADCAST_SRC_STREAM_COUNT) |
| |
| BUILD_ASSERT(CONFIG_BT_ISO_TX_BUF_COUNT >= TOTAL_BUF_NEEDED, |
| "CONFIG_BT_ISO_TX_BUF_COUNT should be at least " |
| "BROADCAST_ENQUEUE_COUNT * CONFIG_BT_BAP_BROADCAST_SRC_STREAM_COUNT"); |
| |
| static struct bt_bap_lc3_preset preset_16_2_1 = BT_BAP_LC3_BROADCAST_PRESET_16_2_1( |
| BT_AUDIO_LOCATION_FRONT_LEFT, BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED); |
| static struct bt_bap_stream streams[CONFIG_BT_BAP_BROADCAST_SRC_STREAM_COUNT]; |
| static struct bt_bap_broadcast_source *broadcast_source; |
| |
| NET_BUF_POOL_FIXED_DEFINE(tx_pool, |
| TOTAL_BUF_NEEDED, |
| BT_ISO_SDU_BUF_SIZE(CONFIG_BT_ISO_TX_MTU), |
| CONFIG_BT_CONN_TX_USER_DATA_SIZE, NULL); |
| static uint8_t mock_data[CONFIG_BT_ISO_TX_MTU]; |
| static uint16_t seq_num; |
| static bool stopping; |
| |
| static K_SEM_DEFINE(sem_started, 0U, ARRAY_SIZE(streams)); |
| static K_SEM_DEFINE(sem_stopped, 0U, ARRAY_SIZE(streams)); |
| |
| #define BROADCAST_SOURCE_LIFETIME 120U /* seconds */ |
| |
| static void stream_started_cb(struct bt_bap_stream *stream) |
| { |
| k_sem_give(&sem_started); |
| } |
| |
| static void stream_stopped_cb(struct bt_bap_stream *stream, uint8_t reason) |
| { |
| k_sem_give(&sem_stopped); |
| } |
| |
| static void stream_sent_cb(struct bt_bap_stream *stream) |
| { |
| static uint32_t sent_cnt; |
| struct net_buf *buf; |
| int ret; |
| |
| if (stopping) { |
| return; |
| } |
| |
| buf = net_buf_alloc(&tx_pool, K_FOREVER); |
| if (buf == NULL) { |
| printk("Could not allocate buffer when sending on %p\n", |
| stream); |
| return; |
| } |
| |
| net_buf_reserve(buf, BT_ISO_CHAN_SEND_RESERVE); |
| net_buf_add_mem(buf, mock_data, preset_16_2_1.qos.sdu); |
| ret = bt_bap_stream_send(stream, buf, seq_num++, |
| BT_ISO_TIMESTAMP_NONE); |
| if (ret < 0) { |
| /* This will end broadcasting on this stream. */ |
| printk("Unable to broadcast data on %p: %d\n", stream, ret); |
| net_buf_unref(buf); |
| return; |
| } |
| |
| sent_cnt++; |
| if ((sent_cnt % 1000U) == 0U) { |
| printk("Sent %u total ISO packets\n", sent_cnt); |
| } |
| } |
| |
| static struct bt_bap_stream_ops stream_ops = { |
| .started = stream_started_cb, |
| .stopped = stream_stopped_cb, |
| .sent = stream_sent_cb |
| }; |
| |
| static int setup_broadcast_source(struct bt_bap_broadcast_source **source) |
| { |
| struct bt_bap_broadcast_source_stream_param |
| stream_params[CONFIG_BT_BAP_BROADCAST_SRC_STREAM_COUNT]; |
| struct bt_bap_broadcast_source_subgroup_param |
| subgroup_param[CONFIG_BT_BAP_BROADCAST_SRC_SUBGROUP_COUNT]; |
| struct bt_bap_broadcast_source_create_param create_param; |
| const size_t streams_per_subgroup = ARRAY_SIZE(stream_params) / ARRAY_SIZE(subgroup_param); |
| int err; |
| |
| (void)memset(streams, 0, sizeof(streams)); |
| |
| for (size_t i = 0U; i < ARRAY_SIZE(subgroup_param); i++) { |
| subgroup_param[i].params_count = streams_per_subgroup; |
| subgroup_param[i].params = stream_params + i * streams_per_subgroup; |
| subgroup_param[i].codec = &preset_16_2_1.codec; |
| } |
| |
| for (size_t j = 0U; j < ARRAY_SIZE(stream_params); j++) { |
| stream_params[j].stream = &streams[j]; |
| stream_params[j].data = NULL; |
| stream_params[j].data_count = 0U; |
| bt_bap_stream_cb_register(stream_params[j].stream, &stream_ops); |
| } |
| |
| create_param.params_count = ARRAY_SIZE(subgroup_param); |
| create_param.params = subgroup_param; |
| create_param.qos = &preset_16_2_1.qos; |
| create_param.encryption = false; |
| create_param.packing = BT_ISO_PACKING_SEQUENTIAL; |
| |
| printk("Creating broadcast source with %zu subgroups with %zu streams\n", |
| ARRAY_SIZE(subgroup_param), |
| ARRAY_SIZE(subgroup_param) * streams_per_subgroup); |
| |
| err = bt_bap_broadcast_source_create(&create_param, source); |
| if (err != 0) { |
| printk("Unable to create broadcast source: %d\n", err); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| int main(void) |
| { |
| struct bt_le_ext_adv *adv; |
| int err; |
| |
| err = bt_enable(NULL); |
| if (err) { |
| printk("Bluetooth init failed (err %d)\n", err); |
| return 0; |
| } |
| printk("Bluetooth initialized\n"); |
| |
| for (size_t i = 0U; i < ARRAY_SIZE(mock_data); i++) { |
| /* Initialize mock data */ |
| mock_data[i] = i; |
| } |
| |
| while (true) { |
| /* Broadcast Audio Streaming Endpoint advertising data */ |
| NET_BUF_SIMPLE_DEFINE(ad_buf, |
| BT_UUID_SIZE_16 + BT_AUDIO_BROADCAST_ID_SIZE); |
| NET_BUF_SIMPLE_DEFINE(base_buf, 128); |
| struct bt_data ext_ad; |
| struct bt_data per_ad; |
| uint32_t broadcast_id; |
| |
| /* Create a non-connectable non-scannable advertising set */ |
| err = bt_le_ext_adv_create(BT_LE_EXT_ADV_NCONN_NAME, NULL, &adv); |
| if (err != 0) { |
| printk("Unable to create extended advertising set: %d\n", |
| err); |
| return 0; |
| } |
| |
| /* Set periodic advertising parameters */ |
| err = bt_le_per_adv_set_param(adv, BT_LE_PER_ADV_DEFAULT); |
| if (err) { |
| printk("Failed to set periodic advertising parameters" |
| " (err %d)\n", err); |
| return 0; |
| } |
| |
| printk("Creating broadcast source\n"); |
| err = setup_broadcast_source(&broadcast_source); |
| if (err != 0) { |
| printk("Unable to setup broadcast source: %d\n", err); |
| return 0; |
| } |
| |
| err = bt_bap_broadcast_source_get_id(broadcast_source, &broadcast_id); |
| if (err != 0) { |
| printk("Unable to get broadcast ID: %d\n", err); |
| return 0; |
| } |
| |
| /* Setup extended advertising data */ |
| net_buf_simple_add_le16(&ad_buf, BT_UUID_BROADCAST_AUDIO_VAL); |
| net_buf_simple_add_le24(&ad_buf, broadcast_id); |
| ext_ad.type = BT_DATA_SVC_DATA16; |
| ext_ad.data_len = ad_buf.len; |
| ext_ad.data = ad_buf.data; |
| err = bt_le_ext_adv_set_data(adv, &ext_ad, 1, NULL, 0); |
| if (err != 0) { |
| printk("Failed to set extended advertising data: %d\n", |
| err); |
| return 0; |
| } |
| |
| /* Setup periodic advertising data */ |
| err = bt_bap_broadcast_source_get_base(broadcast_source, &base_buf); |
| if (err != 0) { |
| printk("Failed to get encoded BASE: %d\n", err); |
| return 0; |
| } |
| |
| per_ad.type = BT_DATA_SVC_DATA16; |
| per_ad.data_len = base_buf.len; |
| per_ad.data = base_buf.data; |
| err = bt_le_per_adv_set_data(adv, &per_ad, 1); |
| if (err != 0) { |
| printk("Failed to set periodic advertising data: %d\n", |
| err); |
| return 0; |
| } |
| |
| /* Start extended advertising */ |
| err = bt_le_ext_adv_start(adv, BT_LE_EXT_ADV_START_DEFAULT); |
| if (err) { |
| printk("Failed to start extended advertising: %d\n", |
| err); |
| return 0; |
| } |
| |
| /* Enable Periodic Advertising */ |
| err = bt_le_per_adv_start(adv); |
| if (err) { |
| printk("Failed to enable periodic advertising: %d\n", |
| err); |
| return 0; |
| } |
| |
| printk("Starting broadcast source\n"); |
| stopping = false; |
| err = bt_bap_broadcast_source_start(broadcast_source, adv); |
| if (err != 0) { |
| printk("Unable to start broadcast source: %d\n", err); |
| return 0; |
| } |
| |
| /* Wait for all to be started */ |
| for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) { |
| k_sem_take(&sem_started, K_FOREVER); |
| } |
| printk("Broadcast source started\n"); |
| |
| /* Initialize sending */ |
| for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) { |
| for (unsigned int j = 0U; j < BROADCAST_ENQUEUE_COUNT; j++) { |
| stream_sent_cb(&streams[i]); |
| } |
| } |
| |
| printk("Waiting %u seconds before stopped\n", |
| BROADCAST_SOURCE_LIFETIME); |
| k_sleep(K_SECONDS(BROADCAST_SOURCE_LIFETIME)); |
| |
| printk("Stopping broadcast source\n"); |
| stopping = true; |
| err = bt_bap_broadcast_source_stop(broadcast_source); |
| if (err != 0) { |
| printk("Unable to stop broadcast source: %d\n", err); |
| return 0; |
| } |
| |
| /* Wait for all to be stopped */ |
| for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) { |
| k_sem_take(&sem_stopped, K_FOREVER); |
| } |
| printk("Broadcast source stopped\n"); |
| |
| printk("Deleting broadcast source\n"); |
| err = bt_bap_broadcast_source_delete(broadcast_source); |
| if (err != 0) { |
| printk("Unable to delete broadcast source: %d\n", err); |
| return 0; |
| } |
| printk("Broadcast source deleted\n"); |
| broadcast_source = NULL; |
| seq_num = 0; |
| |
| err = bt_le_per_adv_stop(adv); |
| if (err) { |
| printk("Failed to stop periodic advertising (err %d)\n", |
| err); |
| return 0; |
| } |
| |
| err = bt_le_ext_adv_stop(adv); |
| if (err) { |
| printk("Failed to stop extended advertising (err %d)\n", |
| err); |
| return 0; |
| } |
| |
| err = bt_le_ext_adv_delete(adv); |
| if (err) { |
| printk("Failed to delete extended advertising (err %d)\n", |
| err); |
| return 0; |
| } |
| } |
| return 0; |
| } |