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/*
* Copyright (c) 2021-2022 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#if defined(CONFIG_BT_AUDIO_BROADCAST_SOURCE)
#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/bluetooth/audio/audio.h>
#include "common.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_AUDIO_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_AUDIO_BROADCAST_SRC_STREAM_COUNT");
NET_BUF_POOL_FIXED_DEFINE(tx_pool,
TOTAL_BUF_NEEDED,
BT_ISO_SDU_BUF_SIZE(CONFIG_BT_ISO_TX_MTU), 8, NULL);
extern enum bst_result_t bst_result;
static struct bt_audio_stream broadcast_source_streams[CONFIG_BT_AUDIO_BROADCAST_SRC_STREAM_COUNT];
static struct bt_audio_stream *streams[ARRAY_SIZE(broadcast_source_streams)];
static struct bt_audio_lc3_preset preset_16_2_1 =
BT_AUDIO_LC3_BROADCAST_PRESET_16_2_1(BT_AUDIO_LOCATION_FRONT_LEFT,
BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED);
static struct bt_audio_lc3_preset preset_16_2_2 =
BT_AUDIO_LC3_BROADCAST_PRESET_16_2_2(BT_AUDIO_LOCATION_FRONT_LEFT,
BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED);
CREATE_FLAG(flag_stopping);
static K_SEM_DEFINE(sem_started, 0U, ARRAY_SIZE(streams));
static K_SEM_DEFINE(sem_stopped, 0U, ARRAY_SIZE(streams));
static void started_cb(struct bt_audio_stream *stream)
{
printk("Stream %p started\n", stream);
k_sem_give(&sem_started);
}
static void stopped_cb(struct bt_audio_stream *stream)
{
printk("Stream %p stopped\n", stream);
k_sem_give(&sem_stopped);
}
static void sent_cb(struct bt_audio_stream *stream)
{
static uint8_t mock_data[CONFIG_BT_ISO_TX_MTU];
static bool mock_data_initialized;
static uint16_t seq_num;
struct net_buf *buf;
int ret;
if (TEST_FLAG(flag_stopping)) {
return;
}
if (!mock_data_initialized) {
for (size_t i = 0U; i < ARRAY_SIZE(mock_data); i++) {
/* Initialize mock data */
mock_data[i] = (uint8_t)i;
}
mock_data_initialized = true;
}
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);
/* Use preset_16_2_1 as that is the config we end up using */
net_buf_add_mem(buf, mock_data, preset_16_2_1.qos.sdu);
ret = bt_audio_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;
}
}
static struct bt_audio_stream_ops stream_ops = {
.started = started_cb,
.stopped = stopped_cb,
.sent = sent_cb
};
static int setup_broadcast_source(struct bt_audio_broadcast_source **source)
{
struct bt_codec_data bis_codec_data = BT_CODEC_DATA(BT_CODEC_CONFIG_LC3_FREQ,
BT_CODEC_CONFIG_LC3_FREQ_16KHZ);
struct bt_audio_broadcast_source_stream_param
stream_params[ARRAY_SIZE(broadcast_source_streams)];
struct bt_audio_broadcast_source_subgroup_param
subgroup_params[CONFIG_BT_AUDIO_BROADCAST_SRC_SUBGROUP_COUNT];
struct bt_audio_broadcast_source_create_param create_param;
int err;
(void)memset(broadcast_source_streams, 0,
sizeof(broadcast_source_streams));
for (size_t i = 0; i < ARRAY_SIZE(stream_params); i++) {
stream_params[i].stream = &broadcast_source_streams[i];
bt_audio_stream_cb_register(stream_params[i].stream,
&stream_ops);
stream_params[i].data_count = 1U;
stream_params[i].data = &bis_codec_data;
}
for (size_t i = 0U; i < ARRAY_SIZE(subgroup_params); i++) {
subgroup_params[i].params_count = 1U;
subgroup_params[i].params = &stream_params[i];
subgroup_params[i].codec = &preset_16_2_1.codec;
}
create_param.params_count = ARRAY_SIZE(subgroup_params);
create_param.params = subgroup_params;
create_param.qos = &preset_16_2_2.qos;
printk("Creating broadcast source with %zu subgroups and %zu streams\n",
ARRAY_SIZE(subgroup_params), ARRAY_SIZE(stream_params));
err = bt_audio_broadcast_source_create(&create_param, source);
if (err != 0) {
printk("Unable to create broadcast source: %d\n", err);
return err;
}
return 0;
}
static int setup_extended_adv(struct bt_audio_broadcast_source *source,
struct bt_le_ext_adv **adv)
{
/* 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;
int err;
/* 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 err;
}
/* 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: %d\n",
err);
return err;
}
err = bt_audio_broadcast_source_get_id(source, &broadcast_id);
if (err != 0) {
printk("Unable to get broadcast ID: %d\n", err);
return err;
}
/* 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 err;
}
/* Setup periodic advertising data */
err = bt_audio_broadcast_source_get_base(source, &base_buf);
if (err != 0) {
printk("Failed to get encoded BASE: %d\n", err);
return err;
}
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 err;
}
/* 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 err;
}
/* Enable Periodic Advertising */
err = bt_le_per_adv_start(*adv);
if (err) {
printk("Failed to enable periodic advertising: %d\n", err);
return err;
}
return 0;
}
static int stop_extended_adv(struct bt_le_ext_adv *adv)
{
int err;
err = bt_le_per_adv_stop(adv);
if (err) {
printk("Failed to stop periodic advertising: %d\n", err);
return err;
}
err = bt_le_ext_adv_stop(adv);
if (err) {
printk("Failed to stop extended advertising: %d\n", err);
return err;
}
err = bt_le_ext_adv_delete(adv);
if (err) {
printk("Failed to delete extended advertising: %d\n", err);
return err;
}
return 0;
}
static void test_main(void)
{
struct bt_audio_broadcast_source *source;
struct bt_le_ext_adv *adv;
int err;
err = bt_enable(NULL);
if (err) {
FAIL("Bluetooth init failed (err %d)\n", err);
return;
}
printk("Bluetooth initialized\n");
err = setup_broadcast_source(&source);
if (err != 0) {
FAIL("Unable to setup broadcast source: %d\n", err);
return;
}
err = setup_extended_adv(source, &adv);
if (err != 0) {
FAIL("Failed to setup extended advertising: %d\n", err);
return;
}
printk("Reconfiguring broadcast source\n");
err = bt_audio_broadcast_source_reconfig(source, &preset_16_2_1.codec,
&preset_16_2_1.qos);
if (err != 0) {
FAIL("Unable to reconfigure broadcast source: %d\n", err);
return;
}
printk("Starting broadcast source\n");
err = bt_audio_broadcast_source_start(source, adv);
if (err != 0) {
FAIL("Unable to start broadcast source: %d\n", err);
return;
}
/* Wait for all to be started */
printk("Waiting for streams to be started\n");
for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) {
k_sem_take(&sem_started, K_FOREVER);
}
/* Initialize sending */
for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) {
for (unsigned int j = 0U; j < BROADCAST_ENQUEUE_COUNT; j++) {
sent_cb(streams[i]);
}
}
/* Keeping running for a little while */
k_sleep(K_SECONDS(15));
printk("Stopping broadcast source\n");
SET_FLAG(flag_stopping);
err = bt_audio_broadcast_source_stop(source);
if (err != 0) {
FAIL("Unable to stop broadcast source: %d\n", err);
return;
}
/* Wait for all to be stopped */
printk("Waiting for streams to be stopped\n");
for (size_t i = 0U; i < ARRAY_SIZE(streams); i++) {
k_sem_take(&sem_stopped, K_FOREVER);
}
printk("Deleting broadcast source\n");
err = bt_audio_broadcast_source_delete(source);
if (err != 0) {
FAIL("Unable to delete broadcast source: %d\n", err);
return;
}
source = NULL;
err = stop_extended_adv(adv);
if (err != 0) {
FAIL("Unable to stop extended advertising: %d\n", err);
return;
}
adv = NULL;
/* Recreate broadcast source to verify that it's possible */
printk("Recreating broadcast source\n");
err = setup_broadcast_source(&source);
if (err != 0) {
FAIL("Unable to setup broadcast source: %d\n", err);
return;
}
printk("Deleting broadcast source\n");
err = bt_audio_broadcast_source_delete(source);
if (err != 0) {
FAIL("Unable to delete broadcast source: %d\n", err);
return;
}
source = NULL;
PASS("Broadcast source passed\n");
}
static const struct bst_test_instance test_broadcast_source[] = {
{
.test_id = "broadcast_source",
.test_post_init_f = test_init,
.test_tick_f = test_tick,
.test_main_f = test_main
},
BSTEST_END_MARKER
};
struct bst_test_list *test_broadcast_source_install(struct bst_test_list *tests)
{
return bst_add_tests(tests, test_broadcast_source);
}
#else /* CONFIG_BT_AUDIO_BROADCAST_SOURCE */
struct bst_test_list *test_broadcast_source_install(struct bst_test_list *tests)
{
return tests;
}
#endif /* CONFIG_BT_AUDIO_BROADCAST_SOURCE */