This adds support for the BAP Scan Delegator role to handle the
Add Source command received from a Broadcast Assistant.
The Broadcast Assistant informs a Scan Delegator about a Broadcaster
by sending a GATT write command for the BASS Broadcast Audio Scan
Control Point characteristic with the "Add Source" opcode. Using
the parameters received through GATT, the Scan Delegator creates
a device for the Broadcaster and adds the BCAA service UUID, so the
device will be probed by BAP as if the Delegator scanned the Broadcaster
autonomously. The BAP plugin will then perform PA sync and it will
create streams for each BIS required by the Assistant. The transports
can then be acquired/released, and the Assistant will be notified
about each change in the state of the streams.
The bluetoothctl and btmon logs below show an example of this scenario:
client/bluetoothctl
[bluetooth]# endpoint.register 00001851-0000-1000-8000-00805f9b34fb 0x06
[/local/endpoint/ep0] Auto Accept (yes/no): y
[/local/endpoint/ep0] Max Transports (auto/value): a
[/local/endpoint/ep0] Locations: 1
[/local/endpoint/ep0] Supported Context (value): 1
[bluetooth]# Endpoint /local/endpoint/ep0 registered
[bluetooth]# advertise on
[bluetooth]# [NEW] Device 00:60:37:31:7E:3F 00-60-37-31-7E-3F
[00-60-37-31-7E-3F]# [NEW] Device 03:E2:C0:11:57:DA 03-E2-C0-11-57-DA
[00-60-37-31-7E-3F]# [NEW] Transport
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0
[00-60-37-31-7E-3F]# Endpoint: SetConfiguration
[00-60-37-31-7E-3F]# Transport
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0
[00-60-37-31-7E-3F]# Properties.Device:
/org/bluez/hci1/dev_03_E2_C0_11_57_DA
[00-60-37-31-7E-3F]# Auto Accepting...
[00-60-37-31-7E-3F]# transport.select
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0
[00-60-37-31-7E-3F]# [CHG] Transport
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0 State: broadcasting
[00-60-37-31-7E-3F]# transport.acquire
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0
auto acquiring...
Transport /org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0 acquiring
[00-60-37-31-7E-3F]# Transport
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0 acquiring complete
[00-60-37-31-7E-3F]# Acquire successful: fd 8 MTU 40:0
[00-60-37-31-7E-3F]# [CHG] Transport
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0 State: active
[00-60-37-31-7E-3F]# transport.release
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0
[00-60-37-31-7E-3F]# Transport fd disconnected
[00-60-37-31-7E-3F]# [CHG] Transport
/org/bluez/hci1/dev_03_E2_C0_11_57_DA/bis1/fd0 State: idle
[00-60-37-31-7E-3F]# Release successful
> ACL Data RX: Handle 0 flags 0x01 dlen 1
ATT: Write Command (0x52) len 23
Handle: 0x0040 Type: Broadcast Audio Scan Control Point (0x2bc7)
Data[21]: 0201da5711c0e203001a2d5602ffff010100000000
Opcode: Add Source (0x02)
Source_Address_Type: 1
Source_Address: 03:E2:C0:11:57:DA
Source_Adv_SID: 0
Broadcast_ID: 0x562d1a
PA_Sync_State: Synchronize to PA - PAST not available
PA_Interval: 0xffff
Num_Subgroups: 1
Subgroup #0:
BIS_Sync State: 0x00000001
< HCI Command: LE Periodic Advertising Create Sync (0x08|0x0044)
Options: 0x0000
Use advertising SID, Advertiser Address Type and address
Reporting initially enabled
SID: 0x00
Adv address type: Random (0x01)
Adv address: 03:E2:C0:11:57:DA (Non-Resolvable)
Skip: 0x0000
Sync timeout: 20000 msec (0x07d0)
Sync CTE type: 0x0000
> HCI Event: Command Status (0x0f) plen 4
LE Periodic Advertising Create Sync (0x08|0x0044) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 16
LE Periodic Advertising Sync Established (0x0e)
Status: Success (0x00)
Sync handle: 0
Advertising SID: 0x00
Advertiser address type: Random (0x01)
Advertiser address: 03:E2:C0:11:57:DA (Non-Resolvable)
Advertiser PHY: LE 2M (0x02)
Periodic advertising interval: 10.00 msec (0x0008)
Advertiser clock accuracy: 0x07
> HCI Event: LE Meta Event (0x3e) plen 42
LE Periodic Advertising Report (0x0f)
Sync handle: 0
TX power: 127 dbm (0x7f)
RSSI: -64 dBm (0xc0)
CTE Type: No Constant Tone Extension (0xff)
Data status: Complete
Data length: 0x22
Service Data: Basic Audio Announcement (0x1851)
Presetation Delay: 40000
Number of Subgroups: 1
Subgroup #0:
Number of BIS(s): 1
Codec: LC3 (0x06)
Codec Specific Configuration: #0: len 0x02 type 0x01
Codec Specific Configuration: Sampling Frequency: 16 Khz
Codec Specific Configuration: #1: len 0x02 type 0x02
Codec Specific Configuration: Frame Duration: 10 ms (0x01)
Codec Specific Configuration: #2: len 0x03 type 0x04
Codec Specific Configuration: Frame Length: 40 (0x0028)
Codec Specific Configuration: #3: len 0x05 type 0x03
Codec Specific Configuration: Location: 0x00000001
Codec Specific Configuration: Location: Front Left
BIS #0:
Index: 1
> HCI Event: LE Meta Event (0x3e) plen 20
LE Broadcast Isochronous Group Info Advertising Report (0x22)
Sync Handle: 0x0000
Number BIS: 1
NSE: 3
ISO Interval: 10.00 msec (0x0008)
BN: 1
PTO: 1
IRC: 3
Maximum PDU: 40
SDU Interval: 10000 us (0x002710)
Maximum SDU: 40
PHY: LE 2M (0x02)
Framing: Unframed (0x00)
Encryption: 0x00
bluetoothd[4636]: < ACL Data TX: Handle 0 flags 0x00 dlen 29
ATT: Handle Multiple Value Notification (0x23) len 24
Length: 0x0014
Handle: 0x003a Type: Broadcast Receive State (0x2bc8)
Data[20]: 0101da5711c0e203001a2d560200010000000000
Source_ID: 1
Source_Address_Type: 1
Source_Address: 03:E2:C0:11:57:DA
Source_Adv_SID: 0
Broadcast_ID: 0x562d1a
PA_Sync_State: Synchronized to PA
BIG_Encryption: Not encrypted
Num_Subgroups: 1
Subgroup #0:
BIS_Sync State: 0x00000000
< HCI Command: LE Broadcast Isochronous Group Create Sync (0x08|0x006b)
BIG Handle: 0x00
BIG Sync Handle: 0x0000
Encryption: Unencrypted (0x00)
Broadcast Code[16]: 00000000000000000000000000000000
Maximum Number Subevents: 0x00
Timeout: 20000 ms (0x07d0)
Number of BIS: 1
BIS ID: 0x01
> HCI Event: Command Status (0x0f) plen 4
LE Broadcast Isochronous Group Create Sync (0x08|0x006b) ncmd 1
Status: Success (0x00
> HCI Event: LE Meta Event (0x3e) plen 17
LE Broadcast Isochronous Group Sync Estabilished (0x1d)
Status: Success (0x00)
BIG Handle: 0x00
Transport Latency: 912 us (0x000390)
NSE: 3
BN: 1
PTO: 1
IRC: 3
Maximum PDU: 40
ISO Interval: 10.00 msec (0x0008)
Connection Handle #0: 10
< HCI Command: LE Setup Isochronous Data Path (0x08|0x006e) plen 13
Handle: 10
Data Path Direction: Output (Controller to Host) (0x01)
Data Path: HCI (0x00)
Coding Format: Transparent (0x03)
Company Codec ID: Ericsson Technology Licensing (0)
Vendor Codec ID: 0
Controller Delay: 0 us (0x000000)
Codec Configuration Length: 0
Codec Configuration[0]:
> HCI Event: Command Complete (0x0e) plen 6
LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1
Status: Success (0x00)
Handle: 10
bluetoothd[4636]: < ACL Data TX: Handle 0 flags 0x00 dlen 29
ATT: Handle Multiple Value Notification (0x23) len 24
Length: 0x0014
Handle: 0x003a Type: Broadcast Receive State (0x2bc8)
Data[20]: 0101da5711c0e203001a2d560200010100000000
Source_ID: 1
Source_Address_Type: 1
Source_Address: 03:E2:C0:11:57:DA
Source_Adv_SID: 0
Broadcast_ID: 0x562d1a
PA_Sync_State: Synchronized to PA
BIG_Encryption: Not encrypted
Num_Subgroups: 1
Subgroup #0:
BIS_Sync State: 0x00000001
bluetoothd[4636]: < ACL Data TX: Handle 0 flags 0x00 dlen 29
ATT: Handle Multiple Value Notification (0x23) len 24
Length: 0x0014
Handle: 0x003a Type: Broadcast Receive State (0x2bc8)
Data[20]: 0101da5711c0e203001a2d560200010000000000
Source_ID: 1
Source_Address_Type: 1
Source_Address: 03:E2:C0:11:57:DA
Source_Adv_SID: 0
Broadcast_ID: 0x562d1a
PA_Sync_State: Synchronized to PA
BIG_Encryption: Not encrypted
Num_Subgroups: 1
Subgroup #0:
BIS_Sync State: 0x00000000
< HCI Command: LE Broadcast Isochronous Group Terminate Sync (0x08|0x006c)
BIG Handle: 0x00
> HCI Event: Command Complete (0x0e) plen 5
LE Broadcast Isochronous Group Terminate Sync (0x08|0x006c) ncmd 1
Status: Success (0x00)
Iulia Tanasescu (14):
shared/bass: Register ATT disconnect cb
shared/bass: Make bt_bcast_src private
shared/bass: Remove io handling
shared/bass: Add support to register cp handlers
shared/bass: Call cp handler for the Add Source op
bass: Register cp handler for Add Source cmd
shared/bass: Add API to set PA sync state
bass: Add APIs to probe/remove Broadcasters
bap: Probe Broadcasters with BASS
shared/bass: Add APIs to set/clear BIS sync bits
bass: Register BAP state changed cb
shared/bass: Add API to check BIS required for sync
bass: Add API to check BIS required for sync
bap: Create streams for required BISes
profiles/audio/bap.c | 137 +++++++---
profiles/audio/bass.c | 204 +++++++++++++++
profiles/audio/bass.h | 5 +
src/shared/bass.c | 587 +++++++++++++++++++-----------------------
src/shared/bass.h | 43 +---
5 files changed, 594 insertions(+), 382 deletions(-)
base-commit: 2f3f63467d72a19b4414907a1ce5dbb870e4e2f2
--
2.39.2
