Merge pull request #272 from zxzxwu/gfp

Bring HfpProtocol back

bumble/hfp.py

@@ -15,16 +15,19 @@
 # -----------------------------------------------------------------------------
 # Imports
 # -----------------------------------------------------------------------------
+import collections.abc
 import logging
 import asyncio
 import dataclasses
 import enum
 import traceback
+import warnings
 from typing import Dict, List, Union, Set
 
 from . import at
 from . import rfcomm
 
+from bumble.colors import color
 from bumble.core import (
     ProtocolError,
     BT_GENERIC_AUDIO_SERVICE,
@@ -49,6 +52,62 @@ from bumble.sdp import (
 logger = logging.getLogger(__name__)
 
 
+# -----------------------------------------------------------------------------
+# Protocol Support
+# -----------------------------------------------------------------------------
+
+# -----------------------------------------------------------------------------
+class HfpProtocol:
+    dlc: rfcomm.DLC
+    buffer: str
+    lines: collections.deque
+    lines_available: asyncio.Event
+
+    def __init__(self, dlc: rfcomm.DLC) -> None:
+        warnings.warn("See HfProtocol", DeprecationWarning)
+        self.dlc = dlc
+        self.buffer = ''
+        self.lines = collections.deque()
+        self.lines_available = asyncio.Event()
+
+        dlc.sink = self.feed
+
+    def feed(self, data: Union[bytes, str]) -> None:
+        # Convert the data to a string if needed
+        if isinstance(data, bytes):
+            data = data.decode('utf-8')
+
+        logger.debug(f'<<< Data received: {data}')
+
+        # Add to the buffer and look for lines
+        self.buffer += data
+        while (separator := self.buffer.find('\r')) >= 0:
+            line = self.buffer[:separator].strip()
+            self.buffer = self.buffer[separator + 1 :]
+            if len(line) > 0:
+                self.on_line(line)
+
+    def on_line(self, line: str) -> None:
+        self.lines.append(line)
+        self.lines_available.set()
+
+    def send_command_line(self, line: str) -> None:
+        logger.debug(color(f'>>> {line}', 'yellow'))
+        self.dlc.write(line + '\r')
+
+    def send_response_line(self, line: str) -> None:
+        logger.debug(color(f'>>> {line}', 'yellow'))
+        self.dlc.write('\r\n' + line + '\r\n')
+
+    async def next_line(self) -> str:
+        await self.lines_available.wait()
+        line = self.lines.popleft()
+        if not self.lines:
+            self.lines_available.clear()
+        logger.debug(color(f'<<< {line}', 'green'))
+        return line
+
+
 # -----------------------------------------------------------------------------
 # Normative protocol definitions
 # -----------------------------------------------------------------------------

examples/run_hfp_gateway.py

@@ -16,11 +16,9 @@
 # Imports
 # -----------------------------------------------------------------------------
 import asyncio
-import collections
 import sys
 import os
 import logging
-from typing import Union
 
 from bumble.colors import color
 
@@ -32,8 +30,7 @@ from bumble.core import (
     BT_RFCOMM_PROTOCOL_ID,
     BT_BR_EDR_TRANSPORT,
 )
-from bumble import rfcomm
-from bumble.rfcomm import Client
+from bumble import rfcomm, hfp
 from bumble.sdp import (
     Client as SDP_Client,
     DataElement,
@@ -47,61 +44,6 @@ from bumble.sdp import (
 logger = logging.getLogger(__name__)
 
 
-# -----------------------------------------------------------------------------
-# Protocol Support
-# -----------------------------------------------------------------------------
-
-# -----------------------------------------------------------------------------
-class HfpProtocol:
-    dlc: rfcomm.DLC
-    buffer: str
-    lines: collections.deque
-    lines_available: asyncio.Event
-
-    def __init__(self, dlc: rfcomm.DLC) -> None:
-        self.dlc = dlc
-        self.buffer = ''
-        self.lines = collections.deque()
-        self.lines_available = asyncio.Event()
-
-        dlc.sink = self.feed
-
-    def feed(self, data: Union[bytes, str]) -> None:
-        # Convert the data to a string if needed
-        if isinstance(data, bytes):
-            data = data.decode('utf-8')
-
-        logger.debug(f'<<< Data received: {data}')
-
-        # Add to the buffer and look for lines
-        self.buffer += data
-        while (separator := self.buffer.find('\r')) >= 0:
-            line = self.buffer[:separator].strip()
-            self.buffer = self.buffer[separator + 1 :]
-            if len(line) > 0:
-                self.on_line(line)
-
-    def on_line(self, line: str) -> None:
-        self.lines.append(line)
-        self.lines_available.set()
-
-    def send_command_line(self, line: str) -> None:
-        logger.debug(color(f'>>> {line}', 'yellow'))
-        self.dlc.write(line + '\r')
-
-    def send_response_line(self, line: str) -> None:
-        logger.debug(color(f'>>> {line}', 'yellow'))
-        self.dlc.write('\r\n' + line + '\r\n')
-
-    async def next_line(self) -> str:
-        await self.lines_available.wait()
-        line = self.lines.popleft()
-        if not self.lines:
-            self.lines_available.clear()
-        logger.debug(color(f'<<< {line}', 'green'))
-        return line
-
-
 # -----------------------------------------------------------------------------
 # pylint: disable-next=too-many-nested-blocks
 async def list_rfcomm_channels(device, connection):
@@ -241,7 +183,7 @@ async def main():
 
         # Create a client and start it
         print('@@@ Starting to RFCOMM client...')
-        rfcomm_client = Client(device, connection)
+        rfcomm_client = rfcomm.Client(device, connection)
         rfcomm_mux = await rfcomm_client.start()
         print('@@@ Started')
 
@@ -256,7 +198,7 @@ async def main():
             return
 
         # Protocol loop (just for testing at this point)
-        protocol = HfpProtocol(session)
+        protocol = hfp.HfpProtocol(session)
         while True:
             line = await protocol.next_line()
 

tests/hfp_test.py

@@ -0,0 +1,100 @@
+# 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.
+
+# -----------------------------------------------------------------------------
+# Imports
+# -----------------------------------------------------------------------------
+import asyncio
+import logging
+import os
+import pytest
+
+from typing import Tuple
+
+from .test_utils import TwoDevices
+from bumble import hfp
+from bumble import rfcomm
+
+
+# -----------------------------------------------------------------------------
+# Logging
+# -----------------------------------------------------------------------------
+logger = logging.getLogger(__name__)
+
+
+# -----------------------------------------------------------------------------
+async def make_hfp_connections(
+    hf_config: hfp.Configuration,
+) -> Tuple[hfp.HfProtocol, hfp.HfpProtocol]:
+    # Setup devices
+    devices = TwoDevices()
+    await devices.setup_connection()
+
+    # Setup RFCOMM channel
+    wait_dlc = asyncio.get_running_loop().create_future()
+    rfcomm_channel = rfcomm.Server(devices.devices[0]).listen(
+        lambda dlc: wait_dlc.set_result(dlc)
+    )
+    assert devices.connections[0]
+    assert devices.connections[1]
+    client_mux = await rfcomm.Client(devices.devices[1], devices.connections[1]).start()
+
+    client_dlc = await client_mux.open_dlc(rfcomm_channel)
+    server_dlc = await wait_dlc
+
+    # Setup HFP connnection
+    hf = hfp.HfProtocol(client_dlc, hf_config)
+    ag = hfp.HfpProtocol(server_dlc)
+    return hf, ag
+
+
+# -----------------------------------------------------------------------------
+
+
+@pytest.mark.asyncio
+async def test_slc():
+    hf_config = hfp.Configuration(
+        supported_hf_features=[], supported_hf_indicators=[], supported_audio_codecs=[]
+    )
+    hf, ag = await make_hfp_connections(hf_config)
+
+    async def ag_loop():
+        while line := await ag.next_line():
+            if line.startswith('AT+BRSF'):
+                ag.send_response_line('+BRSF: 0')
+            elif line.startswith('AT+CIND=?'):
+                ag.send_response_line(
+                    '+CIND: ("call",(0,1)),("callsetup",(0-3)),("service",(0-1)),'
+                    '("signal",(0-5)),("roam",(0,1)),("battchg",(0-5)),'
+                    '("callheld",(0-2))'
+                )
+            elif line.startswith('AT+CIND?'):
+                ag.send_response_line('+CIND: 0,0,1,4,1,5,0')
+            ag.send_response_line('OK')
+
+    ag_task = asyncio.create_task(ag_loop())
+
+    await hf.initiate_slc()
+    ag_task.cancel()
+
+
+# -----------------------------------------------------------------------------
+async def run():
+    await test_slc()
+
+
+# -----------------------------------------------------------------------------
+if __name__ == '__main__':
+    logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
+    asyncio.run(run())