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# Copyright 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.
"""LE Audio - Gaming Audio Profile"""
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
import struct
from enum import IntFlag
from bumble.gatt import (
GATT_BGR_FEATURES_CHARACTERISTIC,
GATT_BGS_FEATURES_CHARACTERISTIC,
GATT_GAMING_AUDIO_SERVICE,
GATT_GMAP_ROLE_CHARACTERISTIC,
GATT_UGG_FEATURES_CHARACTERISTIC,
GATT_UGT_FEATURES_CHARACTERISTIC,
Characteristic,
TemplateService,
)
from bumble.gatt_adapters import DelegatedCharacteristicProxyAdapter
from bumble.gatt_client import CharacteristicProxy, ProfileServiceProxy, ServiceProxy
# -----------------------------------------------------------------------------
# Classes
# -----------------------------------------------------------------------------
class GmapRole(IntFlag):
UNICAST_GAME_GATEWAY = 1 << 0
UNICAST_GAME_TERMINAL = 1 << 1
BROADCAST_GAME_SENDER = 1 << 2
BROADCAST_GAME_RECEIVER = 1 << 3
class UggFeatures(IntFlag):
UGG_MULTIPLEX = 1 << 0
UGG_96_KBPS_SOURCE = 1 << 1
UGG_MULTISINK = 1 << 2
class UgtFeatures(IntFlag):
UGT_SOURCE = 1 << 0
UGT_80_KBPS_SOURCE = 1 << 1
UGT_SINK = 1 << 2
UGT_64_KBPS_SINK = 1 << 3
UGT_MULTIPLEX = 1 << 4
UGT_MULTISINK = 1 << 5
UGT_MULTISOURCE = 1 << 6
class BgsFeatures(IntFlag):
BGS_96_KBPS = 1 << 0
class BgrFeatures(IntFlag):
BGR_MULTISINK = 1 << 0
BGR_MULTIPLEX = 1 << 1
# -----------------------------------------------------------------------------
# Server
# -----------------------------------------------------------------------------
class GamingAudioService(TemplateService):
UUID = GATT_GAMING_AUDIO_SERVICE
gmap_role: Characteristic
ugg_features: Characteristic | None = None
ugt_features: Characteristic | None = None
bgs_features: Characteristic | None = None
bgr_features: Characteristic | None = None
def __init__(
self,
gmap_role: GmapRole,
ugg_features: UggFeatures | None = None,
ugt_features: UgtFeatures | None = None,
bgs_features: BgsFeatures | None = None,
bgr_features: BgrFeatures | None = None,
) -> None:
characteristics = []
ugg_features = UggFeatures(0) if ugg_features is None else ugg_features
ugt_features = UgtFeatures(0) if ugt_features is None else ugt_features
bgs_features = BgsFeatures(0) if bgs_features is None else bgs_features
bgr_features = BgrFeatures(0) if bgr_features is None else bgr_features
self.gmap_role = Characteristic(
uuid=GATT_GMAP_ROLE_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READABLE,
value=struct.pack('B', gmap_role),
)
characteristics.append(self.gmap_role)
if gmap_role & GmapRole.UNICAST_GAME_GATEWAY:
self.ugg_features = Characteristic(
uuid=GATT_UGG_FEATURES_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READABLE,
value=struct.pack('B', ugg_features),
)
characteristics.append(self.ugg_features)
if gmap_role & GmapRole.UNICAST_GAME_TERMINAL:
self.ugt_features = Characteristic(
uuid=GATT_UGT_FEATURES_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READABLE,
value=struct.pack('B', ugt_features),
)
characteristics.append(self.ugt_features)
if gmap_role & GmapRole.BROADCAST_GAME_SENDER:
self.bgs_features = Characteristic(
uuid=GATT_BGS_FEATURES_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READABLE,
value=struct.pack('B', bgs_features),
)
characteristics.append(self.bgs_features)
if gmap_role & GmapRole.BROADCAST_GAME_RECEIVER:
self.bgr_features = Characteristic(
uuid=GATT_BGR_FEATURES_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READABLE,
value=struct.pack('B', bgr_features),
)
characteristics.append(self.bgr_features)
super().__init__(characteristics)
# -----------------------------------------------------------------------------
# Client
# -----------------------------------------------------------------------------
class GamingAudioServiceProxy(ProfileServiceProxy):
SERVICE_CLASS = GamingAudioService
ugg_features: CharacteristicProxy[UggFeatures] | None = None
ugt_features: CharacteristicProxy[UgtFeatures] | None = None
bgs_features: CharacteristicProxy[BgsFeatures] | None = None
bgr_features: CharacteristicProxy[BgrFeatures] | None = None
def __init__(self, service_proxy: ServiceProxy) -> None:
self.service_proxy = service_proxy
self.gmap_role = DelegatedCharacteristicProxyAdapter(
service_proxy.get_required_characteristic_by_uuid(
GATT_GMAP_ROLE_CHARACTERISTIC
),
decode=lambda value: GmapRole(value[0]),
)
if characteristics := service_proxy.get_characteristics_by_uuid(
GATT_UGG_FEATURES_CHARACTERISTIC
):
self.ugg_features = DelegatedCharacteristicProxyAdapter(
characteristics[0],
decode=lambda value: UggFeatures(value[0]),
)
if characteristics := service_proxy.get_characteristics_by_uuid(
GATT_UGT_FEATURES_CHARACTERISTIC
):
self.ugt_features = DelegatedCharacteristicProxyAdapter(
characteristics[0],
decode=lambda value: UgtFeatures(value[0]),
)
if characteristics := service_proxy.get_characteristics_by_uuid(
GATT_BGS_FEATURES_CHARACTERISTIC
):
self.bgs_features = DelegatedCharacteristicProxyAdapter(
characteristics[0],
decode=lambda value: BgsFeatures(value[0]),
)
if characteristics := service_proxy.get_characteristics_by_uuid(
GATT_BGR_FEATURES_CHARACTERISTIC
):
self.bgr_features = DelegatedCharacteristicProxyAdapter(
characteristics[0],
decode=lambda value: BgrFeatures(value[0]),
)
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