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550 lines
20 KiB
Python
550 lines
20 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 struct
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from collections.abc import Awaitable
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import pytest
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from bumble import a2dp, avdtp
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from bumble.controller import Controller
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from bumble.core import PhysicalTransport
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from bumble.device import Device
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from bumble.host import Host
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from bumble.link import LocalLink
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from bumble.rtp import MediaPacket
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from bumble.transport.common import AsyncPipeSink
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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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addresses = ['F0:F1:F2:F3:F4:F5', 'F5:F4:F3:F2:F1:F0']
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self.link = LocalLink()
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self.controllers = [
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Controller('C1', link=self.link, public_address=addresses[0]),
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Controller('C2', link=self.link, public_address=addresses[1]),
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]
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self.devices = [
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Device(
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address=addresses[0],
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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=addresses[1],
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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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def on_paired(self, which, keys):
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self.paired[which] = keys
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# -----------------------------------------------------------------------------
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class Data:
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pointer: int = 0
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data: bytes
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def __init__(self, data: bytes):
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self.data = data
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async def read(self, length: int) -> Awaitable[bytes]:
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def generate_read():
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end = min(self.pointer + length, len(self.data))
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chunk = self.data[self.pointer : end]
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self.pointer = end
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return chunk
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return generate_read()
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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(
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'connection', lambda connection: two_devices.on_connection(0, connection)
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)
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two_devices.devices[1].on(
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'connection', lambda connection: two_devices.on_connection(1, connection)
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)
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# Enable Classic connections
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two_devices.devices[0].classic_enabled = True
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two_devices.devices[1].classic_enabled = True
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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 asyncio.gather(
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two_devices.devices[0].connect(
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two_devices.devices[1].public_address, transport=PhysicalTransport.BR_EDR
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),
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two_devices.devices[1].accept(two_devices.devices[0].public_address),
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)
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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 avdtp.MediaCodecCapabilities(
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media_type=avdtp.MediaType.AUDIO,
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media_codec_type=a2dp.CodecType.SBC,
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media_codec_information=a2dp.SbcMediaCodecInformation(
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sampling_frequency=a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_44100,
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channel_mode=a2dp.SbcMediaCodecInformation.ChannelMode.JOINT_STEREO,
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block_length=a2dp.SbcMediaCodecInformation.BlockLength.BL_16,
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subbands=a2dp.SbcMediaCodecInformation.Subbands.S_8,
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allocation_method=a2dp.SbcMediaCodecInformation.AllocationMethod.LOUDNESS,
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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 avdtp.MediaCodecCapabilities(
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media_type=avdtp.MediaType.AUDIO,
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media_codec_type=a2dp.CodecType.SBC,
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media_codec_information=a2dp.SbcMediaCodecInformation(
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sampling_frequency=a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_48000
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| a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_44100
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| a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_32000
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| a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_16000,
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channel_mode=a2dp.SbcMediaCodecInformation.ChannelMode.MONO
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| a2dp.SbcMediaCodecInformation.ChannelMode.DUAL_CHANNEL
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| a2dp.SbcMediaCodecInformation.ChannelMode.STEREO
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| a2dp.SbcMediaCodecInformation.ChannelMode.JOINT_STEREO,
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block_length=a2dp.SbcMediaCodecInformation.BlockLength.BL_4
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_8
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_12
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_16,
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subbands=a2dp.SbcMediaCodecInformation.Subbands.S_4
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| a2dp.SbcMediaCodecInformation.Subbands.S_8,
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allocation_method=a2dp.SbcMediaCodecInformation.AllocationMethod.LOUDNESS
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| a2dp.SbcMediaCodecInformation.AllocationMethod.SNR,
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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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# Enable Classic connections
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two_devices.devices[0].classic_enabled = True
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two_devices.devices[1].classic_enabled = True
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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 = avdtp.Listener.for_device(two_devices.devices[1])
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listener.on('connection', on_avdtp_connection)
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async def make_connection():
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connections = await asyncio.gather(
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two_devices.devices[0].connect(
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two_devices.devices[1].public_address, PhysicalTransport.BR_EDR
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),
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two_devices.devices[1].accept(two_devices.devices[0].public_address),
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)
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return connections[0]
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connection = await make_connection()
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client = await avdtp.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.MediaType.AUDIO
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assert remote_sink.tsep == avdtp.StreamEndPointType.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(
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2, 0, 0, 0, sequence_number, timestamp, 0, [], 96, payload
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)
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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 = avdtp.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.State.STREAMING
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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.State.STREAMING
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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.State.IDLE
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assert sink.in_use == 0
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assert sink.stream.state == avdtp.State.IDLE
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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])) 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.State.STREAMING
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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.State.STREAMING
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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.State.IDLE
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assert sink.in_use == 0
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assert sink.stream.state == avdtp.State.IDLE
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# -----------------------------------------------------------------------------
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def test_sbc_codec_specific_information():
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sbc_info = a2dp.SbcMediaCodecInformation.from_bytes(bytes.fromhex("3fff0235"))
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assert (
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sbc_info.sampling_frequency
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== a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_44100
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| a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_48000
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)
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assert (
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sbc_info.channel_mode
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== a2dp.SbcMediaCodecInformation.ChannelMode.MONO
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| a2dp.SbcMediaCodecInformation.ChannelMode.DUAL_CHANNEL
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| a2dp.SbcMediaCodecInformation.ChannelMode.STEREO
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| a2dp.SbcMediaCodecInformation.ChannelMode.JOINT_STEREO
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)
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assert (
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sbc_info.block_length
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== a2dp.SbcMediaCodecInformation.BlockLength.BL_4
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_8
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_12
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_16
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)
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assert (
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sbc_info.subbands
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== a2dp.SbcMediaCodecInformation.Subbands.S_4
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| a2dp.SbcMediaCodecInformation.Subbands.S_8
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)
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assert (
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sbc_info.allocation_method
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== a2dp.SbcMediaCodecInformation.AllocationMethod.SNR
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| a2dp.SbcMediaCodecInformation.AllocationMethod.LOUDNESS
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)
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assert sbc_info.minimum_bitpool_value == 2
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assert sbc_info.maximum_bitpool_value == 53
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sbc_info2 = a2dp.SbcMediaCodecInformation(
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a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_44100
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| a2dp.SbcMediaCodecInformation.SamplingFrequency.SF_48000,
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a2dp.SbcMediaCodecInformation.ChannelMode.MONO
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| a2dp.SbcMediaCodecInformation.ChannelMode.DUAL_CHANNEL
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| a2dp.SbcMediaCodecInformation.ChannelMode.STEREO
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| a2dp.SbcMediaCodecInformation.ChannelMode.JOINT_STEREO,
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a2dp.SbcMediaCodecInformation.BlockLength.BL_4
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_8
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_12
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| a2dp.SbcMediaCodecInformation.BlockLength.BL_16,
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a2dp.SbcMediaCodecInformation.Subbands.S_4
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| a2dp.SbcMediaCodecInformation.Subbands.S_8,
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a2dp.SbcMediaCodecInformation.AllocationMethod.SNR
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| a2dp.SbcMediaCodecInformation.AllocationMethod.LOUDNESS,
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2,
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53,
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)
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assert sbc_info == sbc_info2
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assert bytes(sbc_info2) == bytes.fromhex("3fff0235")
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# -----------------------------------------------------------------------------
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def test_aac_codec_specific_information():
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aac_info = a2dp.AacMediaCodecInformation.from_bytes(bytes.fromhex("f0018c83e800"))
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assert (
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aac_info.object_type
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== a2dp.AacMediaCodecInformation.ObjectType.MPEG_2_AAC_LC
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| a2dp.AacMediaCodecInformation.ObjectType.MPEG_4_AAC_LC
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| a2dp.AacMediaCodecInformation.ObjectType.MPEG_4_AAC_LTP
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| a2dp.AacMediaCodecInformation.ObjectType.MPEG_4_AAC_SCALABLE
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)
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assert (
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aac_info.sampling_frequency
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== a2dp.AacMediaCodecInformation.SamplingFrequency.SF_44100
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| a2dp.AacMediaCodecInformation.SamplingFrequency.SF_48000
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)
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assert (
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aac_info.channels
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== a2dp.AacMediaCodecInformation.Channels.MONO
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| a2dp.AacMediaCodecInformation.Channels.STEREO
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)
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assert aac_info.vbr == 1
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assert aac_info.bitrate == 256000
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aac_info2 = a2dp.AacMediaCodecInformation(
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a2dp.AacMediaCodecInformation.ObjectType.MPEG_2_AAC_LC
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| a2dp.AacMediaCodecInformation.ObjectType.MPEG_4_AAC_LC
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| a2dp.AacMediaCodecInformation.ObjectType.MPEG_4_AAC_LTP
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| a2dp.AacMediaCodecInformation.ObjectType.MPEG_4_AAC_SCALABLE,
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a2dp.AacMediaCodecInformation.SamplingFrequency.SF_44100
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| a2dp.AacMediaCodecInformation.SamplingFrequency.SF_48000,
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a2dp.AacMediaCodecInformation.Channels.MONO
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| a2dp.AacMediaCodecInformation.Channels.STEREO,
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1,
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256000,
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)
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assert aac_info == aac_info2
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assert bytes(aac_info2) == bytes.fromhex("f0018c83e800")
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# -----------------------------------------------------------------------------
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def test_opus_codec_specific_information():
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opus_info = a2dp.OpusMediaCodecInformation.from_bytes(bytes([0x92]))
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assert opus_info.vendor_id == a2dp.OpusMediaCodecInformation.VENDOR_ID
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assert opus_info.codec_id == a2dp.OpusMediaCodecInformation.CODEC_ID
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assert opus_info.frame_size == a2dp.OpusMediaCodecInformation.FrameSize.FS_20MS
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assert opus_info.channel_mode == a2dp.OpusMediaCodecInformation.ChannelMode.STEREO
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assert (
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opus_info.sampling_frequency
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== a2dp.OpusMediaCodecInformation.SamplingFrequency.SF_48000
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)
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opus_info2 = a2dp.OpusMediaCodecInformation(
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a2dp.OpusMediaCodecInformation.ChannelMode.STEREO,
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a2dp.OpusMediaCodecInformation.FrameSize.FS_20MS,
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a2dp.OpusMediaCodecInformation.SamplingFrequency.SF_48000,
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)
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assert opus_info2 == opus_info
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assert opus_info2.value == bytes([0x92])
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# -----------------------------------------------------------------------------
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async def test_sbc_parser():
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header = b'\x9c\x80\x08\x00'
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payload = b'\x00\x00\x00\x00\x00\x00'
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data = Data(header + payload)
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parser = a2dp.SbcParser(data.read)
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async for frame in parser.frames:
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assert frame.sampling_frequency == 44100
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assert frame.block_count == 4
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assert frame.channel_mode == 0
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assert frame.allocation_method == 0
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assert frame.subband_count == 4
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assert frame.bitpool == 8
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assert frame.payload == header + payload
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# -----------------------------------------------------------------------------
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async def test_sbc_packet_source():
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header = b'\x9c\x80\x08\x00'
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payload = b'\x00\x00\x00\x00\x00\x00'
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data = Data((header + payload) * 2)
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packet_source = a2dp.SbcPacketSource(data.read, 23)
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async for packet in packet_source.packets:
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assert packet.sequence_number == 0
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assert packet.timestamp == 0
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assert packet.payload == b'\x01' + header + payload
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|
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# -----------------------------------------------------------------------------
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async def test_aac_parser():
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header = b'\xff\xf0\x10\x00\x01\xa0\x00'
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payload = b'\x00\x00\x00\x00\x00\x00'
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data = Data(header + payload)
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parser = a2dp.AacParser(data.read)
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async for frame in parser.frames:
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assert frame.profile == a2dp.AacFrame.Profile.MAIN
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assert frame.sampling_frequency == 44100
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assert frame.channel_configuration == 0
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assert frame.payload == payload
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# -----------------------------------------------------------------------------
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async def test_aac_packet_source():
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header = b'\xff\xf0\x10\x00\x01\xa0\x00'
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payload = b'\x00\x00\x00\x00\x00\x00'
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data = Data(header + payload)
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packet_source = a2dp.AacPacketSource(data.read, 0)
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async for packet in packet_source.packets:
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assert packet.sequence_number == 0
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assert packet.timestamp == 0
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assert packet.payload == b' \x00\x12\x00\x00\x000\x00\x00\x00\x00\x00\x00'
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# -----------------------------------------------------------------------------
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async def test_opus_parser():
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packed_header_data_revised = struct.pack(
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"<QIIIB",
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0, # granule_position
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2, # bitstream_serial_number
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2, # page_sequence_number
|
|
0, # crc_checksum
|
|
3, # page_segments
|
|
)
|
|
|
|
first_page_header_revised = (
|
|
b'OggS' # Capture pattern
|
|
+ b'\x00' # Version
|
|
+ b'\x02' # Header type
|
|
+ packed_header_data_revised
|
|
)
|
|
|
|
segment_table_revised = b'\x0a\x08\x0a'
|
|
|
|
opus_head_packet_data = b'OpusHead' + b'\x00' + b'\x00'
|
|
opus_tags_packet_data = b'OpusTags'
|
|
audio_data_packet = b'0123456789'
|
|
|
|
data = Data(
|
|
first_page_header_revised
|
|
+ segment_table_revised
|
|
+ opus_head_packet_data
|
|
+ opus_tags_packet_data
|
|
+ audio_data_packet
|
|
)
|
|
|
|
parser = a2dp.OpusParser(data.read)
|
|
async for packet in parser.packets:
|
|
assert packet.channel_mode == a2dp.OpusPacket.ChannelMode.STEREO
|
|
assert packet.payload == audio_data_packet
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
async def test_opus_packet_source():
|
|
packed_header_data_revised = struct.pack(
|
|
"<QIIIB",
|
|
0, # granule_position
|
|
2, # bitstream_serial_number
|
|
2, # page_sequence_number
|
|
0, # crc_checksum
|
|
3, # page_segments
|
|
)
|
|
|
|
first_page_header_revised = (
|
|
b'OggS' # Capture pattern
|
|
+ b'\x00' # Version
|
|
+ b'\x02' # Header type
|
|
+ packed_header_data_revised
|
|
)
|
|
|
|
segment_table_revised = b'\x0a\x08\x0a'
|
|
|
|
opus_head_packet_data = b'OpusHead' + b'\x00' + b'\x00'
|
|
opus_tags_packet_data = b'OpusTags'
|
|
audio_data_packet = b'0123456789'
|
|
|
|
data = Data(
|
|
first_page_header_revised
|
|
+ segment_table_revised
|
|
+ opus_head_packet_data
|
|
+ opus_tags_packet_data
|
|
+ audio_data_packet
|
|
)
|
|
|
|
parser = a2dp.OpusPacketSource(data.read, 0)
|
|
async for packet in parser.packets:
|
|
assert packet.sequence_number == 0
|
|
assert packet.timestamp == 0
|
|
assert packet.payload == b'\x01' + audio_data_packet
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
async def async_main():
|
|
test_sbc_codec_specific_information()
|
|
test_aac_codec_specific_information()
|
|
test_opus_codec_specific_information()
|
|
await test_self_connection()
|
|
await test_source_sink_1()
|
|
test_sbc_parser()
|
|
test_sbc_packet_source()
|
|
test_aac_parser()
|
|
test_aac_packet_source()
|
|
test_opus_parser()
|
|
test_opus_packet_source()
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
if __name__ == '__main__':
|
|
logging.basicConfig(level=os.environ.get('BUMBLE_LOGLEVEL', 'INFO').upper())
|
|
asyncio.run(async_main())
|