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85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
# Copyright 2021-2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""LE Audio - Telephony and Media Audio Profile"""
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import enum
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import logging
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import struct
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from bumble.gatt import (
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GATT_TELEPHONY_AND_MEDIA_AUDIO_SERVICE,
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GATT_TMAP_ROLE_CHARACTERISTIC,
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Characteristic,
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TemplateService,
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)
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from bumble.gatt_adapters import DelegatedCharacteristicProxyAdapter
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from bumble.gatt_client import CharacteristicProxy, ProfileServiceProxy, ServiceProxy
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# -----------------------------------------------------------------------------
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# Logging
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# -----------------------------------------------------------------------------
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logger = logging.getLogger(__name__)
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# -----------------------------------------------------------------------------
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# Classes
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# -----------------------------------------------------------------------------
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class Role(enum.IntFlag):
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CALL_GATEWAY = 1 << 0
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CALL_TERMINAL = 1 << 1
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UNICAST_MEDIA_SENDER = 1 << 2
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UNICAST_MEDIA_RECEIVER = 1 << 3
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BROADCAST_MEDIA_SENDER = 1 << 4
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BROADCAST_MEDIA_RECEIVER = 1 << 5
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# -----------------------------------------------------------------------------
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class TelephonyAndMediaAudioService(TemplateService):
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UUID = GATT_TELEPHONY_AND_MEDIA_AUDIO_SERVICE
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role_characteristic: Characteristic[bytes]
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def __init__(self, role: Role):
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self.role_characteristic = Characteristic(
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GATT_TMAP_ROLE_CHARACTERISTIC,
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Characteristic.Properties.READ,
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Characteristic.READABLE,
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struct.pack('<H', int(role)),
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)
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super().__init__([self.role_characteristic])
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# -----------------------------------------------------------------------------
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class TelephonyAndMediaAudioServiceProxy(ProfileServiceProxy):
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SERVICE_CLASS = TelephonyAndMediaAudioService
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role: CharacteristicProxy[Role]
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def __init__(self, service_proxy: ServiceProxy):
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self.service_proxy = service_proxy
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self.role = DelegatedCharacteristicProxyAdapter(
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service_proxy.get_required_characteristic_by_uuid(
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GATT_TMAP_ROLE_CHARACTERISTIC
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),
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decode=lambda value: Role(
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struct.unpack_from('<H', value, 0)[0],
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),
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)
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