Create a gRPC client for HFP Service in Python to do topshim testing.

#!/usr/bin/env python3

#

#   Copyright 2022 - The Android Open Source Project

#

#   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

#

#       http://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.

import asyncio

import grpc

from blueberry.facade.topshim import facade_pb2

from blueberry.facade.topshim import facade_pb2_grpc

from blueberry.tests.topshim.lib.async_closable import AsyncClosable

from google.protobuf import empty_pb2 as empty_proto

class HfpClient(AsyncClosable):

    """

    Wrapper gRPC interface to the HFP Service

    """

    # Timeout for async wait

    DEFAULT_TIMEOUT = 2

    __task_list = []

    __channel = None

    __hfp_stub = None

    def __init__(self, port=8999):

        self.__channel = grpc.aio.insecure_channel("localhost:%d" % port)

        self.__hfp_stub = facade_pb2_grpc.HfpServiceStub(self.__channel)

    async def close(self):

        """

        Terminate the current tasks.

        """

        for task in self.__task_list:

            task.cancel()

            task = None

        self.__task_list.clear()

        await self.__channel.close()

    async def start_slc(self, address):

        """

        """

        await self.__hfp_stub.StartSlc(

            facade_pb2.StartSlcRequest(connection=facade_pb2.Connection(cookie=address.encode())))

    async def stop_slc(self, address):

        """

        """

        await self.__hfp_stub.StopSlc(

            facade_pb2.StopSlcRequest(connection=facade_pb2.Connection(cookie=address.encode())))

    async def connect_audio(self, address, is_sco_offload_enabled=False, force_cvsd=False):

        """

        """

        await self.__hfp_stub.ConnectAudio(

            facade_pb2.ConnectAudioRequest(

                connection=facade_pb2.Connection(cookie=address.encode()),

                is_sco_offload_enabled=is_sco_offload_enabled,

                force_cvsd=force_cvsd))

    async def disconnect_audio(self, address):

        """

        """

        await self.__hfp_stub.DisconnectAudio(

            facade_pb2.DisconnectAudioRequest(connection=facade_pb2.Connection(cookie=address.encode())))

    async def set_volume(self, address, volume):

        """

        """

        await self.__hfp_stub.DisconnectAudio(

            facade_pb2.DisconnectAudioRequest(connection=facade_pb2.Connection(cookie=address.encode()), volume=volume))