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95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
# Copyright 2024 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
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"""LE Audio - Broadcast Audio Scan Service"""
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import logging
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from typing import Optional
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from bumble import device
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from bumble import gatt
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from bumble import gatt_client
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from bumble import utils
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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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# Constants
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# -----------------------------------------------------------------------------
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class ApplicationError(utils.OpenIntEnum):
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OPCODE_NOT_SUPPORTED = 0x80
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INVALID_SOURCE_ID = 0x81
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# -----------------------------------------------------------------------------
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class BroadcastAudioScanService(gatt.TemplateService):
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UUID = gatt.GATT_BROADCAST_AUDIO_SCAN_SERVICE
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def __init__(self):
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self.broadcast_audio_scan_control_point_characteristic = gatt.Characteristic(
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gatt.GATT_BROADCAST_AUDIO_SCAN_CONTROL_POINT_CHARACTERISTIC,
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gatt.Characteristic.Properties.WRITE
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| gatt.Characteristic.Properties.WRITE_WITHOUT_RESPONSE,
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gatt.Characteristic.WRITEABLE,
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gatt.CharacteristicValue(
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write=self.on_broadcast_audio_scan_control_point_write
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),
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)
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self.broadcast_receive_state_characteristic = gatt.Characteristic(
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gatt.GATT_BROADCAST_RECEIVE_STATE_CHARACTERISTIC,
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gatt.Characteristic.Properties.READ | gatt.Characteristic.Properties.NOTIFY,
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gatt.Characteristic.Permissions.READABLE
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| gatt.Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
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b'12', # TEST
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)
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super().__init__([self.battery_level_characteristic])
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def on_broadcast_audio_scan_control_point_write(
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self, connection: device.Connection, value: bytes
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) -> None:
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pass
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# -----------------------------------------------------------------------------
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class BroadcastAudioScanServiceProxy(gatt_client.ProfileServiceProxy):
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SERVICE_CLASS = BroadcastAudioScanService
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broadcast_audio_scan_control_point: Optional[gatt_client.CharacteristicProxy]
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broadcast_receive_state: Optional[gatt_client.CharacteristicProxy]
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def __init__(self, service_proxy: gatt_client.ServiceProxy):
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self.service_proxy = service_proxy
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if characteristics := service_proxy.get_characteristics_by_uuid(
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gatt.GATT_BROADCAST_AUDIO_SCAN_CONTROL_POINT_CHARACTERISTIC
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):
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self.broadcast_audio_scan_control_point = characteristics[0]
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else:
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self.broadcast_audio_scan_control_point = None
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if characteristics := service_proxy.get_characteristics_by_uuid(
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gatt.GATT_BROADCAST_RECEIVE_STATE_CHARACTERISTIC
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):
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self.broadcast_receive_state = characteristics[0]
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else:
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self.broadcast_receive_state = None
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