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Merge pull request #598 from google/gbg/gatt-class-adapter

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Add a class-based GATT adapter
This commit is contained in:
Gilles Boccon-Gibod
2024-12-03 08:46:30 -08:00
committed by GitHub
parent 97fcfc2fa0 8715333706
commit 3ce7b9255b
13 changed files with 520 additions and 132 deletions
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84
bumble/profiles/aics.py
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@@ -17,6 +17,7 @@
# -----------------------------------------------------------------------------
# Imports
# -----------------------------------------------------------------------------
from __future__ import annotations
import logging
import struct
@@ -28,10 +29,11 @@ from bumble.device import Connection
from bumble.att import ATT_Error
from bumble.gatt import (
Characteristic,
DelegatedCharacteristicAdapter,
SerializableCharacteristicAdapter,
PackedCharacteristicAdapter,
TemplateService,
CharacteristicValue,
PackedCharacteristicAdapter,
UTF8CharacteristicAdapter,
GATT_AUDIO_INPUT_CONTROL_SERVICE,
GATT_AUDIO_INPUT_STATE_CHARACTERISTIC,
GATT_GAIN_SETTINGS_ATTRIBUTE_CHARACTERISTIC,
@@ -154,9 +156,6 @@ class AudioInputState:
attribute=self.attribute_value, value=bytes(self)
)
def on_read(self, _connection: Optional[Connection]) -> bytes:
return bytes(self)
@dataclass
class GainSettingsProperties:
@@ -173,7 +172,7 @@ class GainSettingsProperties:
(gain_settings_unit, gain_settings_minimum, gain_settings_maximum) = (
struct.unpack('BBB', data)
)
GainSettingsProperties(
return GainSettingsProperties(
gain_settings_unit, gain_settings_minimum, gain_settings_maximum
)
@@ -186,9 +185,6 @@ class GainSettingsProperties:
]
)
def on_read(self, _connection: Optional[Connection]) -> bytes:
return bytes(self)
@dataclass
class AudioInputControlPoint:
@@ -321,21 +317,14 @@ class AudioInputDescription:
audio_input_description: str = "Bluetooth"
attribute_value: Optional[CharacteristicValue] = None
@classmethod
def from_bytes(cls, data: bytes):
return cls(audio_input_description=data.decode('utf-8'))
def on_read(self, _connection: Optional[Connection]) -> str:
return self.audio_input_description
def __bytes__(self) -> bytes:
return self.audio_input_description.encode('utf-8')
def on_read(self, _connection: Optional[Connection]) -> bytes:
return self.audio_input_description.encode('utf-8')
async def on_write(self, connection: Optional[Connection], value: bytes) -> None:
async def on_write(self, connection: Optional[Connection], value: str) -> None:
assert connection
assert self.attribute_value
self.audio_input_description = value.decode('utf-8')
self.audio_input_description = value
await connection.device.notify_subscribers(
attribute=self.attribute_value, value=value
)
@@ -375,26 +364,29 @@ class AICSService(TemplateService):
self.audio_input_state, self.gain_settings_properties
)
self.audio_input_state_characteristic = DelegatedCharacteristicAdapter(
self.audio_input_state_characteristic = SerializableCharacteristicAdapter(
Characteristic(
uuid=GATT_AUDIO_INPUT_STATE_CHARACTERISTIC,
properties=Characteristic.Properties.READ
| Characteristic.Properties.NOTIFY,
permissions=Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
value=CharacteristicValue(read=self.audio_input_state.on_read),
value=self.audio_input_state,
),
encode=lambda value: bytes(value),
AudioInputState,
)
self.audio_input_state.attribute_value = (
self.audio_input_state_characteristic.value
)
self.gain_settings_properties_characteristic = DelegatedCharacteristicAdapter(
Characteristic(
uuid=GATT_GAIN_SETTINGS_ATTRIBUTE_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
value=CharacteristicValue(read=self.gain_settings_properties.on_read),
self.gain_settings_properties_characteristic = (
SerializableCharacteristicAdapter(
Characteristic(
uuid=GATT_GAIN_SETTINGS_ATTRIBUTE_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
value=self.gain_settings_properties,
),
GainSettingsProperties,
)
)
@@ -402,7 +394,7 @@ class AICSService(TemplateService):
uuid=GATT_AUDIO_INPUT_TYPE_CHARACTERISTIC,
properties=Characteristic.Properties.READ,
permissions=Characteristic.Permissions.READ_REQUIRES_ENCRYPTION,
value=audio_input_type,
value=bytes(audio_input_type, 'utf-8'),
)
self.audio_input_status_characteristic = Characteristic(
@@ -412,18 +404,14 @@ class AICSService(TemplateService):
value=bytes([self.audio_input_status]),
)
self.audio_input_control_point_characteristic = DelegatedCharacteristicAdapter(
Characteristic(
uuid=GATT_AUDIO_INPUT_CONTROL_POINT_CHARACTERISTIC,
properties=Characteristic.Properties.WRITE,
permissions=Characteristic.Permissions.WRITE_REQUIRES_ENCRYPTION,
value=CharacteristicValue(
write=self.audio_input_control_point.on_write
),
)
self.audio_input_control_point_characteristic = Characteristic(
uuid=GATT_AUDIO_INPUT_CONTROL_POINT_CHARACTERISTIC,
properties=Characteristic.Properties.WRITE,
permissions=Characteristic.Permissions.WRITE_REQUIRES_ENCRYPTION,
value=CharacteristicValue(write=self.audio_input_control_point.on_write),
)
self.audio_input_description_characteristic = DelegatedCharacteristicAdapter(
self.audio_input_description_characteristic = UTF8CharacteristicAdapter(
Characteristic(
uuid=GATT_AUDIO_INPUT_DESCRIPTION_CHARACTERISTIC,
properties=Characteristic.Properties.READ
@@ -469,8 +457,8 @@ class AICSServiceProxy(ProfileServiceProxy):
)
):
raise gatt.InvalidServiceError("Audio Input State Characteristic not found")
self.audio_input_state = DelegatedCharacteristicAdapter(
characteristic=characteristics[0], decode=AudioInputState.from_bytes
self.audio_input_state = SerializableCharacteristicAdapter(
characteristics[0], AudioInputState
)
if not (
@@ -481,9 +469,8 @@ class AICSServiceProxy(ProfileServiceProxy):
raise gatt.InvalidServiceError(
"Gain Settings Attribute Characteristic not found"
)
self.gain_settings_properties = PackedCharacteristicAdapter(
characteristics[0],
'BBB',
self.gain_settings_properties = SerializableCharacteristicAdapter(
characteristics[0], GainSettingsProperties
)
if not (
@@ -494,10 +481,7 @@ class AICSServiceProxy(ProfileServiceProxy):
raise gatt.InvalidServiceError(
"Audio Input Status Characteristic not found"
)
self.audio_input_status = PackedCharacteristicAdapter(
characteristics[0],
'B',
)
self.audio_input_status = PackedCharacteristicAdapter(characteristics[0], 'B')
if not (
characteristics := service_proxy.get_characteristics_by_uuid(
@@ -517,4 +501,4 @@ class AICSServiceProxy(ProfileServiceProxy):
raise gatt.InvalidServiceError(
"Audio Input Description Characteristic not found"
)
self.audio_input_description = characteristics[0]
self.audio_input_description = UTF8CharacteristicAdapter(characteristics[0])