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 probes it with BAP. The BAP plugin
will then perform long-lived 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 (16):
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 cmd
bap: Add support for long-lived PA sync
bap: Add API for Scan Delegator probe
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 | 124 +++++++--
profiles/audio/bap.h | 1 +
profiles/audio/bass.c | 202 +++++++++++++++
profiles/audio/bass.h | 5 +
src/shared/bass.c | 587 +++++++++++++++++++-----------------------
src/shared/bass.h | 43 +---
6 files changed, 590 insertions(+), 372 deletions(-)
base-commit: 32a0811685c5dd290f1152bef2dfbde3b2848446
--
2.39.2
