wip

bumble/profiles/tmap.py

@@ -0,0 +1,87 @@
+# Copyright 2021-2022 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 - Telephony and Media Audio Profile"""
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import enum
+import logging
+import struct
+from typing import Optional
+
+from bumble.gatt import (
+    TemplateService,
+    Characteristic,
+    DelegatedCharacteristicAdapter,
+    GATT_TELEPHONY_AND_MEDIA_AUDIO_SERVICE,
+    GATT_TMAP_ROLE_CHARACTERISTIC,
+)
+from bumble.gatt_client import ProfileServiceProxy, ServiceProxy
+
+
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
+
+# -----------------------------------------------------------------------------
+# Classes
+# -----------------------------------------------------------------------------
+class Role(enum.IntFlag):
+    CALL_GATEWAY = 1 << 0
+    CALL_TERMINAL = 1 << 1
+    UNICAST_MEDIA_SENDER = 1 << 2
+    UNICAST_MEDIA_RECEIVER = 1 << 3
+    BROADCAST_MEDIA_SENDER = 1 << 4
+    BROADCAST_MEDIA_RECEIVER = 1 << 5
+
+
+# -----------------------------------------------------------------------------
+class TelephonyAndMediaAudioService(TemplateService):
+    UUID = GATT_TELEPHONY_AND_MEDIA_AUDIO_SERVICE
+
+    def __init__(self, role: Role):
+        self.role_characteristic = Characteristic(
+            GATT_TMAP_ROLE_CHARACTERISTIC,
+            Characteristic.Properties.READ,
+            Characteristic.READABLE,
+            struct.pack('<H', int(role)),
+        )
+
+        super().__init__([self.role_characteristic])
+
+
+# -----------------------------------------------------------------------------
+class TelephonyAndMediaAudioServiceProxy(ProfileServiceProxy):
+    SERVICE_CLASS = TelephonyAndMediaAudioService
+
+    role: Optional[DelegatedCharacteristicAdapter]
+
+    def __init__(self, service_proxy: ServiceProxy):
+        self.service_proxy = service_proxy
+
+        if characteristics := service_proxy.get_characteristics_by_uuid(
+            GATT_TMAP_ROLE_CHARACTERISTIC
+        ):
+            self.role = DelegatedCharacteristicAdapter(
+                characteristics[0],
+                decode=lambda value: Role(
+                    struct.unpack_from('<H', value, 0)[0],
+                ),
+            )
+        else:
+            self.role = None