251 lines
8.7 KiB
Python
251 lines
8.7 KiB
Python
# Copyright 2021-2022 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 the specific language governing permissions and
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# limitations under the License.
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import asyncio
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import logging
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import os
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import pytest
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from bumble.controller import Controller
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from bumble.link import LocalLink
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from bumble.device import Device
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from bumble.host import Host
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from bumble.transport import AsyncPipeSink
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from bumble.avdtp import (
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AVDTP_IDLE_STATE,
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AVDTP_STREAMING_STATE,
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MediaPacketPump,
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Protocol,
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Listener,
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MediaCodecCapabilities,
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MediaPacket,
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AVDTP_AUDIO_MEDIA_TYPE,
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AVDTP_TSEP_SNK,
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A2DP_SBC_CODEC_TYPE
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)
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from bumble.a2dp import (
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SbcMediaCodecInformation,
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SBC_MONO_CHANNEL_MODE,
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SBC_DUAL_CHANNEL_MODE,
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SBC_STEREO_CHANNEL_MODE,
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SBC_JOINT_STEREO_CHANNEL_MODE,
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SBC_LOUDNESS_ALLOCATION_METHOD,
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SBC_SNR_ALLOCATION_METHOD
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)
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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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class TwoDevices:
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def __init__(self):
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self.connections = [None, None]
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self.link = LocalLink()
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self.controllers = [
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Controller('C1', link = self.link),
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Controller('C2', link = self.link)
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]
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self.devices = [
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Device(
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address = 'F0:F1:F2:F3:F4:F5',
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host = Host(self.controllers[0], AsyncPipeSink(self.controllers[0]))
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),
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Device(
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address = 'F5:F4:F3:F2:F1:F0',
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host = Host(self.controllers[1], AsyncPipeSink(self.controllers[1]))
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)
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]
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self.paired = [None, None]
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def on_connection(self, which, connection):
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self.connections[which] = connection
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# -----------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_self_connection():
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# Create two devices, each with a controller, attached to the same link
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two_devices = TwoDevices()
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# Attach listeners
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two_devices.devices[0].on('connection', lambda connection: two_devices.on_connection(0, connection))
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two_devices.devices[1].on('connection', lambda connection: two_devices.on_connection(1, connection))
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# Start
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await two_devices.devices[0].power_on()
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await two_devices.devices[1].power_on()
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# Connect the two devices
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await two_devices.devices[0].connect(two_devices.devices[1].random_address)
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# Check the post conditions
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assert(two_devices.connections[0] is not None)
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assert(two_devices.connections[1] is not None)
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# -----------------------------------------------------------------------------
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def source_codec_capabilities():
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return MediaCodecCapabilities(
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media_type = AVDTP_AUDIO_MEDIA_TYPE,
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media_codec_type = A2DP_SBC_CODEC_TYPE,
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media_codec_information = SbcMediaCodecInformation.from_discrete_values(
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sampling_frequency = 44100,
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channel_mode = SBC_JOINT_STEREO_CHANNEL_MODE,
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block_length = 16,
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subbands = 8,
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allocation_method = SBC_LOUDNESS_ALLOCATION_METHOD,
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minimum_bitpool_value = 2,
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maximum_bitpool_value = 53
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)
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)
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# -----------------------------------------------------------------------------
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def sink_codec_capabilities():
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return MediaCodecCapabilities(
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media_type = AVDTP_AUDIO_MEDIA_TYPE,
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media_codec_type = A2DP_SBC_CODEC_TYPE,
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media_codec_information = SbcMediaCodecInformation.from_lists(
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sampling_frequencies = [48000, 44100, 32000, 16000],
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channel_modes = [
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SBC_MONO_CHANNEL_MODE,
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SBC_DUAL_CHANNEL_MODE,
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SBC_STEREO_CHANNEL_MODE,
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SBC_JOINT_STEREO_CHANNEL_MODE
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],
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block_lengths = [4, 8, 12, 16],
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subbands = [4, 8],
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allocation_methods = [SBC_LOUDNESS_ALLOCATION_METHOD, SBC_SNR_ALLOCATION_METHOD],
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minimum_bitpool_value = 2,
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maximum_bitpool_value = 53
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)
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)
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# -----------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_source_sink_1():
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two_devices = TwoDevices()
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await two_devices.devices[0].power_on()
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await two_devices.devices[1].power_on()
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def on_rtp_packet(packet):
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rtp_packets.append(packet)
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if len(rtp_packets) == rtp_packets_expected:
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rtp_packets_fully_received.set_result(None)
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sink = None
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def on_avdtp_connection(server):
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nonlocal sink
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sink = server.add_sink(sink_codec_capabilities())
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sink.on('rtp_packet', on_rtp_packet)
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# Create a listener to wait for AVDTP connections
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listener = Listener(Listener.create_registrar(two_devices.devices[1]))
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listener.on('connection', on_avdtp_connection)
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connection = await two_devices.devices[0].connect(two_devices.devices[1].random_address)
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client = await Protocol.connect(connection)
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endpoints = await client.discover_remote_endpoints()
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assert(len(endpoints) == 1)
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remote_sink = list(endpoints)[0]
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assert(remote_sink.in_use == 0)
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assert(remote_sink.media_type == AVDTP_AUDIO_MEDIA_TYPE)
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assert(remote_sink.tsep == AVDTP_TSEP_SNK)
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async def generate_packets(packet_count):
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sequence_number = 0
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timestamp = 0
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for i in range(packet_count):
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payload = bytes([sequence_number % 256])
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packet = MediaPacket(2, 0, 0, 0, sequence_number, timestamp, 0, [], 96, payload)
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packet.timestamp_seconds = timestamp / 44100
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timestamp += 10
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sequence_number += 1
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yield packet
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# Send packets using a pump object
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rtp_packets_fully_received = asyncio.get_running_loop().create_future()
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rtp_packets_expected = 3
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rtp_packets = []
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pump = MediaPacketPump(generate_packets(3))
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source = client.add_source(source_codec_capabilities(), pump)
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stream = await client.create_stream(source, remote_sink)
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await stream.start()
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assert(stream.state == AVDTP_STREAMING_STATE)
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assert(stream.local_endpoint.in_use == 1)
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assert(stream.rtp_channel is not None)
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assert(sink.in_use == 1)
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assert(sink.stream is not None)
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assert(sink.stream.state == AVDTP_STREAMING_STATE)
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await rtp_packets_fully_received
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await stream.close()
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assert(stream.rtp_channel is None)
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assert(source.in_use == 0)
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assert(source.stream.state == AVDTP_IDLE_STATE)
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assert(sink.in_use == 0)
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assert(sink.stream.state == AVDTP_IDLE_STATE)
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# Send packets manually
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rtp_packets_fully_received = asyncio.get_running_loop().create_future()
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rtp_packets_expected = 3
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rtp_packets = []
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source_packets = [
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MediaPacket(2, 0, 0, 0, i, i * 10, 0, [], 96, bytes([i]))
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for i in range(3)
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]
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source = client.add_source(source_codec_capabilities(), None)
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stream = await client.create_stream(source, remote_sink)
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await stream.start()
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assert(stream.state == AVDTP_STREAMING_STATE)
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assert(stream.local_endpoint.in_use == 1)
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assert(stream.rtp_channel is not None)
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assert(sink.in_use == 1)
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assert(sink.stream is not None)
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assert(sink.stream.state == AVDTP_STREAMING_STATE)
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stream.send_media_packet(source_packets[0])
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stream.send_media_packet(source_packets[1])
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stream.send_media_packet(source_packets[2])
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await stream.close()
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assert(stream.rtp_channel is None)
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assert(len(rtp_packets) == 3)
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assert(source.in_use == 0)
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assert(source.stream.state == AVDTP_IDLE_STATE)
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assert(sink.in_use == 0)
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assert(sink.stream.state == AVDTP_IDLE_STATE)
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# -----------------------------------------------------------------------------
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async def run_test_self():
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await test_self_connection()
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await test_source_sink_1()
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# -----------------------------------------------------------------------------
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if __name__ == '__main__':
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logging.basicConfig(level = os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
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asyncio.run(run_test_self())
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