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# Copyright 2021-2024 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import asyncio
import json
import secrets
import sys
from typing import Optional
import websockets.asyncio.server
import bumble.logging
from bumble import data_types
from bumble.core import AdvertisingData
from bumble.device import AdvertisingEventProperties, AdvertisingParameters, Device
from bumble.hci import CodecID, CodingFormat, OwnAddressType
from bumble.profiles.ascs import AudioStreamControlService
from bumble.profiles.bap import (
AudioLocation,
CodecSpecificCapabilities,
ContextType,
SupportedFrameDuration,
SupportedSamplingFrequency,
UnicastServerAdvertisingData,
)
from bumble.profiles.cap import CommonAudioServiceService
from bumble.profiles.csip import CoordinatedSetIdentificationService, SirkType
from bumble.profiles.pacs import PacRecord, PublishedAudioCapabilitiesService
from bumble.profiles.vcs import VolumeControlService
from bumble.transport import open_transport
def dumps_volume_state(volume_setting: int, muted: int, change_counter: int) -> str:
return json.dumps(
{
'volume_setting': volume_setting,
'muted': muted,
'change_counter': change_counter,
}
)
# -----------------------------------------------------------------------------
async def main() -> None:
if len(sys.argv) < 3:
print('Usage: run_vcp_renderer.py <config-file>' '<transport-spec-for-device>')
return
print('<<< connecting to HCI...')
async with await open_transport(sys.argv[2]) as hci_transport:
print('<<< connected')
device = Device.from_config_file_with_hci(
sys.argv[1], hci_transport.source, hci_transport.sink
)
await device.power_on()
# Add "placeholder" services to enable Android LEA features.
csis = CoordinatedSetIdentificationService(
set_identity_resolving_key=secrets.token_bytes(16),
set_identity_resolving_key_type=SirkType.PLAINTEXT,
)
device.add_service(CommonAudioServiceService(csis))
device.add_service(
PublishedAudioCapabilitiesService(
supported_source_context=ContextType.PROHIBITED,
available_source_context=ContextType.PROHIBITED,
supported_sink_context=ContextType.MEDIA,
available_sink_context=ContextType.MEDIA,
sink_audio_locations=(
AudioLocation.FRONT_LEFT | AudioLocation.FRONT_RIGHT
),
sink_pac=[
# Codec Capability Setting 48_4
PacRecord(
coding_format=CodingFormat(CodecID.LC3),
codec_specific_capabilities=CodecSpecificCapabilities(
supported_sampling_frequencies=(
SupportedSamplingFrequency.FREQ_48000
),
supported_frame_durations=(
SupportedFrameDuration.DURATION_10000_US_SUPPORTED
),
supported_audio_channel_count=[1],
min_octets_per_codec_frame=120,
max_octets_per_codec_frame=120,
supported_max_codec_frames_per_sdu=1,
),
),
],
)
)
device.add_service(AudioStreamControlService(device, sink_ase_id=[1, 2]))
vcs = VolumeControlService()
device.add_service(vcs)
ws: Optional[websockets.asyncio.server.ServerConnection] = None
def on_volume_state_change():
if ws:
asyncio.create_task(
ws.send(
dumps_volume_state(
vcs.volume_setting, vcs.muted, vcs.change_counter
)
)
)
vcs.on('volume_state_change', on_volume_state_change)
advertising_data = (
bytes(
AdvertisingData(
[
data_types.CompleteLocalName('Bumble LE Audio'),
data_types.Flags(
AdvertisingData.LE_GENERAL_DISCOVERABLE_MODE_FLAG
| AdvertisingData.BR_EDR_HOST_FLAG
| AdvertisingData.BR_EDR_CONTROLLER_FLAG
),
data_types.IncompleteListOf16BitServiceUUIDs(
[PublishedAudioCapabilitiesService.UUID]
),
]
)
)
+ csis.get_advertising_data()
+ bytes(UnicastServerAdvertisingData())
)
await device.create_advertising_set(
advertising_parameters=AdvertisingParameters(
advertising_event_properties=AdvertisingEventProperties(),
own_address_type=OwnAddressType.PUBLIC,
),
advertising_data=advertising_data,
)
async def serve(websocket: websockets.asyncio.server.ServerConnection):
nonlocal ws
await websocket.send(
dumps_volume_state(vcs.volume_setting, vcs.muted, vcs.change_counter)
)
ws = websocket
async for message in websocket:
volume_state = json.loads(message)
vcs.volume_setting = volume_state['volume_setting']
vcs.muted = volume_state['muted']
vcs.change_counter = volume_state['change_counter']
await device.notify_subscribers(vcs.volume_state)
ws = None
await websockets.asyncio.server.serve(serve, 'localhost', 8989)
await hci_transport.source.terminated
# -----------------------------------------------------------------------------
bumble.logging.setup_basic_logging('DEBUG')
asyncio.run(main())
|
