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Bluetooth: Audio: Bablesim tests for CAP broadcast reception stop
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Implement a babblesim test for the CAP broadcast reception stop
procedure

Signed-off-by: Andries Kruithof <[email protected]>
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@kruithofa
kruithofa committed Oct 30, 2024
1 parent c22233a commit b57d791
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Showing 2 changed files with 67 additions and 15 deletions.
30 changes: 25 additions & 5 deletions tests/bsim/bluetooth/audio/src/cap_acceptor_test.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -401,9 +401,15 @@ 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[CONFIG_BT_BAP_BASS_MAX_SUBGROUPS])
{
/* We only care about a single subgroup in this test */
uint32_t total_bis = 0U;

broadcaster_broadcast_id = recv_state->broadcast_id;
if (bis_sync_req[0] != 0) {

for (int i = 0; i < recv_state->num_subgroups; i++) {
total_bis |= bis_sync_req[i];
}

if (total_bis != 0U) {
SET_FLAG(flag_bis_sync_requested);
} else {
UNSET_FLAG(flag_bis_sync_requested);
Expand Down Expand Up @@ -792,6 +798,7 @@ static void init(void)
UNSET_FLAG(flag_pa_request);
UNSET_FLAG(flag_received);
UNSET_FLAG(flag_base_metadata_updated);
UNSET_FLAG(flag_bis_sync_requested);

for (size_t i = 0U; i < ARRAY_SIZE(broadcast_sink_streams); i++) {
bt_cap_stream_ops_register(
Expand Down Expand Up @@ -1039,10 +1046,12 @@ static void test_cap_acceptor_broadcast_reception(void)
{
static struct bt_bap_stream *bap_streams[ARRAY_SIZE(broadcast_sink_streams)];
size_t stream_count;
size_t err;

init();

WAIT_FOR_FLAG(flag_pa_request);
WAIT_FOR_FLAG(flag_bis_sync_requested);

pa_sync_create();

Expand All @@ -1051,12 +1060,23 @@ static void test_cap_acceptor_broadcast_reception(void)
sink_wait_for_data();

/* Since we are re-using the BAP broadcast source test
* we get a metadata update, and we need to send an extra
* backchannel sync
* we get a metadata update
*/
base_wait_for_metadata_update();

backchannel_sync_send_all(); /* let broadcaster know we can stop the source */
/* when flag_bis_sync_requested is unset the bis_sync for all subgroups were set to 0 */
WAIT_FOR_UNSET_FLAG(flag_bis_sync_requested);

UNSET_FLAG(flag_syncable);
err = bt_bap_broadcast_sink_stop(g_broadcast_sink);
if (err != 0) {
FAIL("Unable to stop the sink: %d\n", err);
return;
}

WAIT_FOR_FLAG(flag_syncable);
/* Although in theory we can now sync, in practice we can not since all BIS-syncs are 0 */
backchannel_sync_send_all(); /* signal that we have stopped listening */

wait_for_streams_stop(stream_count);

Expand Down
52 changes: 42 additions & 10 deletions tests/bsim/bluetooth/audio/src/cap_commander_test.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@ static uint32_t broadcaster_broadcast_id;

static uint8_t received_base[UINT8_MAX];
static uint8_t received_base_size;
static uint8_t src_id[CONFIG_BT_MAX_CONN];

static struct k_sem sem_disconnected;
static struct k_sem sem_cas_discovered;
Expand All @@ -66,6 +67,7 @@ CREATE_FLAG(flag_microphone_mute_changed);
CREATE_FLAG(flag_microphone_gain_changed);

CREATE_FLAG(flag_broadcast_reception_start);
CREATE_FLAG(flag_broadcast_reception_stop);
CREATE_FLAG(flag_broadcaster_found);
CREATE_FLAG(flag_base_received);
CREATE_FLAG(flag_recv_state_updated_with_bis_sync);
Expand Down Expand Up @@ -166,6 +168,16 @@ static void cap_broadcast_reception_start_cb(struct bt_conn *conn, int err)

SET_FLAG(flag_broadcast_reception_start);
}

static void cap_broadcast_reception_stop_cb(struct bt_conn *conn, int err)
{
if (err != 0) {
FAIL("Failed to perform broadcast reception stop for conn %p: %d\n", conn, err);
return;
}

SET_FLAG(flag_broadcast_reception_stop);
}
#endif /* CONFIG_BT_BAP_BROADCAST_ASSISTANT*/

static struct bt_cap_commander_cb cap_cb = {
Expand All @@ -185,6 +197,7 @@ static struct bt_cap_commander_cb cap_cb = {
#endif /* CONFIG_BT_MICP_MIC_CTLR */
#if defined(CONFIG_BT_BAP_BROADCAST_ASSISTANT)
.broadcast_reception_start = cap_broadcast_reception_start_cb,
.broadcast_reception_stop = cap_broadcast_reception_stop_cb,
#endif /* CONFIG_BT_BAP_BROADCAST_ASSISTANT*/
};

Expand Down Expand Up @@ -427,7 +440,8 @@ bap_broadcast_assistant_recv_state_cb(struct bt_conn *conn, int err,
const struct bt_bap_scan_delegator_recv_state *state)
{
char le_addr[BT_ADDR_LE_STR_LEN];
char bad_code[BT_ISO_BROADCAST_CODE_SIZE * 2 + 1];
char bad_code[BT_AUDIO_BROADCAST_CODE_SIZE * 2 + 1];
size_t acceptor_count = get_dev_cnt() - 2;

if (err != 0) {
FAIL("BASS recv state read failed (%d)\n", err);
Expand All @@ -451,6 +465,12 @@ bap_broadcast_assistant_recv_state_cb(struct bt_conn *conn, int err,
return;
}

for (size_t index = 0; index < acceptor_count; index++) {
if (conn == connected_conns[index]) {
src_id[index] = state->src_id;
}
}

for (uint8_t i = 0; i < state->num_subgroups; i++) {
const struct bt_bap_bass_subgroup *subgroup = &state->subgroups[i];
struct net_buf_simple buf;
Expand Down Expand Up @@ -544,6 +564,7 @@ static void init(size_t acceptor_cnt)
UNSET_FLAG(flag_microphone_gain_changed);

UNSET_FLAG(flag_broadcast_reception_start);
UNSET_FLAG(flag_broadcast_reception_stop);
UNSET_FLAG(flag_broadcaster_found);
UNSET_FLAG(flag_base_received);
UNSET_FLAG(flag_recv_state_updated_with_bis_sync);
Expand Down Expand Up @@ -580,7 +601,6 @@ static void cap_device_found(const bt_addr_le_t *addr, int8_t rssi, uint8_t type
return;
}

printk("Stopping scan\n");
if (bt_le_scan_stop()) {
FAIL("Could not stop scan");
return;
Expand All @@ -607,7 +627,6 @@ static void scan_and_connect(void)
return;
}

printk("Scanning successfully started\n");
WAIT_FOR_FLAG(flag_connected);
connected_conn_cnt++;
}
Expand Down Expand Up @@ -978,17 +997,31 @@ static void test_broadcast_reception_start(size_t acceptor_count)

static void test_broadcast_reception_stop(size_t acceptor_count)
{
struct bt_cap_commander_broadcast_reception_stop_param reception_stop_param;
struct bt_cap_commander_broadcast_reception_stop_param reception_stop_param = {0};
struct bt_cap_commander_broadcast_reception_stop_member_param param[CONFIG_BT_MAX_CONN] = {
0};

int err;

/* reception stop is not implemented yet, for now the following command will fail*/
reception_stop_param.type = BT_CAP_SET_TYPE_AD_HOC;
reception_stop_param.param = NULL;
reception_stop_param.count = 0U;
reception_stop_param.param = param;
reception_stop_param.count = acceptor_count;
for (size_t i = 0; i < acceptor_count; i++) {
uint8_t num_subgroups;

reception_stop_param.param[i].member.member = connected_conns[i];

reception_stop_param.param[i].src_id = src_id[i];
num_subgroups =
bt_bap_base_get_subgroup_count((const struct bt_bap_base *)received_base);
reception_stop_param.param[i].num_subgroups = num_subgroups;
}
err = bt_cap_commander_broadcast_reception_stop(&reception_stop_param);
if (err != 0) {
printk("Command not implemented yet, could not stop broadcast reception %d\n", err);
FAIL("Could not initiate broadcast reception stop: %d\n", err);
return;
}
WAIT_FOR_FLAG(flag_broadcast_reception_stop);
}

static void test_main_cap_commander_capture_and_render(void)
Expand Down Expand Up @@ -1070,8 +1103,7 @@ static void test_main_cap_commander_broadcast_reception(void)

backchannel_sync_wait_any(); /* wait for the acceptor to receive data */

backchannel_sync_wait_any(); /* wait for the acceptor to receive a metadata update
*/
backchannel_sync_wait_any(); /* wait for the acceptor to receive a metadata update */

test_broadcast_reception_stop(acceptor_count);

Expand Down

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