mirror of
https://github.com/kokarare1212/librespot-python.git
synced 2024-09-11 15:48:08 +02:00
147 lines
5.3 KiB
Python
147 lines
5.3 KiB
Python
from __future__ import annotations
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import queue
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from librespot.audio.storage import AudioFile
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from librespot.common import Utils
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from librespot.core import PacketsReceiver, Session
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from librespot.crypto import Packet
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from librespot.standard import BytesInputStream, BytesOutputStream, Closeable, Runnable
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import concurrent.futures
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import logging
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import threading
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class ChannelManager(Closeable, PacketsReceiver.PacketsReceiver):
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CHUNK_SIZE: int = 128 * 1024
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_LOGGER: logging = logging.getLogger(__name__)
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_channels: dict[int, Channel] = dict()
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_seqHolder: int = 0
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_seqHolderLock: threading.Condition = threading.Condition()
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_executorService: concurrent.futures.ThreadPoolExecutor = concurrent.futures.ThreadPoolExecutor(
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)
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_session: Session = None
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def __init__(self, session: Session):
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self._session = session
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def request_chunk(self, file_id: bytes, index: int, file: AudioFile):
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start = int(index * self.CHUNK_SIZE / 4)
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end = int((index + 1) * self.CHUNK_SIZE / 4)
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channel = ChannelManager.Channel(self, file, index)
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self._channels[channel.chunkId] = channel
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out = BytesOutputStream()
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out.write_short(channel.chunkId)
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out.write_int(0x00000000)
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out.write_int(0x00000000)
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out.write_int(0x00004e20)
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out.write_int(0x00030d40)
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out.write(file_id)
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out.write_int(start)
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out.write_int(end)
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self._session.send(Packet.Type.stream_chunk, out.buffer)
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def dispatch(self, packet: Packet) -> None:
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payload = BytesInputStream(packet.payload)
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if packet.is_cmd(Packet.Type.stream_chunk_res):
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chunk_id = payload.read_short()
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channel = self._channels.get(chunk_id)
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if channel is None:
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self._LOGGER.warning(
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"Couldn't find channel, id: {}, received: {}".format(
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chunk_id, len(packet.payload)))
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return
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channel._add_to_queue(payload)
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elif packet.is_cmd(Packet.Type.channel_error):
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chunk_id = payload.read_short()
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channel = self._channels.get(chunk_id)
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if channel is None:
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self._LOGGER.warning(
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"Dropping channel error, id: {}, code: {}".format(
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chunk_id, payload.read_short()))
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return
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channel.stream_error(payload.read_short())
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else:
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self._LOGGER.warning(
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"Couldn't handle packet, cmd: {}, payload: {}".format(
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packet.cmd, Utils.Utils.bytes_to_hex(packet.payload)))
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def close(self) -> None:
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self._executorService.shutdown()
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class Channel:
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_channelManager: ChannelManager
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chunkId: int
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_q: queue.Queue = queue.Queue()
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_file: AudioFile
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_chunkIndex: int
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_buffer: BytesOutputStream = BytesOutputStream()
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_header: bool = True
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def __init__(self, channel_manager: ChannelManager, file: AudioFile,
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chunk_index: int):
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self._channelManager = channel_manager
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self._file = file
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self._chunkIndex = chunk_index
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with self._channelManager._seqHolderLock:
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self.chunkId = self._channelManager._seqHolder
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self._channelManager._seqHolder += 1
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self._channelManager._executorService.submit(
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lambda: ChannelManager.Channel.Handler(self))
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def _handle(self, payload: BytesInputStream) -> bool:
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if len(payload.buffer) == 0:
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if not self._header:
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self._file.write_chunk(bytearray(payload.buffer),
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self._chunkIndex, False)
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return True
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self._channelManager._LOGGER.debug(
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"Received empty chunk, skipping.")
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return False
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if self._header:
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length: int
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while len(payload.buffer) > 0:
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length = payload.read_short()
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if not length > 0:
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break
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header_id = payload.read_byte()
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header_data = payload.read(length - 1)
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self._file.write_header(int.from_bytes(header_id, "big"),
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bytearray(header_data), False)
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self._header = False
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else:
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self._buffer.write(payload.read(len(payload.buffer)))
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return False
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def _add_to_queue(self, payload):
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self._q.put(payload)
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def stream_error(self, code: int) -> None:
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self._file.stream_error(self._chunkIndex, code)
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class Handler(Runnable):
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_channel: ChannelManager.Channel = None
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def __init__(self, channel: ChannelManager.Channel):
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self._channel = channel
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def run(self) -> None:
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self._channel._channelManager._LOGGER.debug(
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"ChannelManager.Handler is starting")
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with self._channel._q.all_tasks_done:
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self._channel._channelManager._channels.pop(
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self._channel.chunkId)
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self._channel._channelManager._LOGGER.debug(
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"ChannelManager.Handler is shutting down")
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