forked from TPD94/devine
694 lines
28 KiB
Python
694 lines
28 KiB
Python
from __future__ import annotations
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import html
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import logging
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import shutil
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import subprocess
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import sys
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from functools import partial
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from pathlib import Path
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from typing import Any, Callable, Optional, Union
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from urllib.parse import urljoin
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from zlib import crc32
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import m3u8
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import requests
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from langcodes import Language, tag_is_valid
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from m3u8 import M3U8
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from pywidevine.cdm import Cdm as WidevineCdm
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from pywidevine.pssh import PSSH
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from requests import Session
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from devine.core.constants import DOWNLOAD_CANCELLED, DOWNLOAD_LICENCE_ONLY, AnyTrack
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from devine.core.downloaders import downloader
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from devine.core.downloaders import requests as requests_downloader
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from devine.core.drm import DRM_T, ClearKey, Widevine
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from devine.core.tracks import Audio, Subtitle, Tracks, Video
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from devine.core.utilities import get_binary_path, get_extension, is_close_match, try_ensure_utf8
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class HLS:
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def __init__(self, manifest: M3U8, session: Optional[Session] = None):
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if not manifest:
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raise ValueError("HLS manifest must be provided.")
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if not isinstance(manifest, M3U8):
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raise TypeError(f"Expected manifest to be a {M3U8}, not {manifest!r}")
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if not manifest.is_variant:
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raise ValueError("Expected the M3U(8) manifest to be a Variant Playlist.")
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self.manifest = manifest
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self.session = session or Session()
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@classmethod
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def from_url(cls, url: str, session: Optional[Session] = None, **args: Any) -> HLS:
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if not url:
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raise requests.URLRequired("HLS manifest URL must be provided.")
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if not isinstance(url, str):
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raise TypeError(f"Expected url to be a {str}, not {url!r}")
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if not session:
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session = Session()
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elif not isinstance(session, Session):
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raise TypeError(f"Expected session to be a {Session}, not {session!r}")
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res = session.get(url, **args)
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if not res.ok:
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raise requests.ConnectionError(
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"Failed to request the M3U(8) document.",
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response=res
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)
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master = m3u8.loads(res.text, uri=url)
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return cls(master, session)
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@classmethod
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def from_text(cls, text: str, url: str) -> HLS:
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if not text:
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raise ValueError("HLS manifest Text must be provided.")
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if not isinstance(text, str):
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raise TypeError(f"Expected text to be a {str}, not {text!r}")
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if not url:
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raise requests.URLRequired("HLS manifest URL must be provided for relative path computations.")
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if not isinstance(url, str):
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raise TypeError(f"Expected url to be a {str}, not {url!r}")
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master = m3u8.loads(text, uri=url)
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return cls(master)
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def to_tracks(self, language: Union[str, Language]) -> Tracks:
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"""
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Convert a Variant Playlist M3U(8) document to Video, Audio and Subtitle Track objects.
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Parameters:
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language: Language you expect the Primary Track to be in.
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All Track objects' URL will be to another M3U(8) document. However, these documents
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will be Invariant Playlists and contain the list of segments URIs among other metadata.
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"""
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session_drm = HLS.get_all_drm(self.manifest.session_keys)
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audio_codecs_by_group_id: dict[str, Audio.Codec] = {}
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tracks = Tracks()
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for playlist in self.manifest.playlists:
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audio_group = playlist.stream_info.audio
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if audio_group:
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audio_codec = Audio.Codec.from_codecs(playlist.stream_info.codecs)
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audio_codecs_by_group_id[audio_group] = audio_codec
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try:
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# TODO: Any better way to figure out the primary track type?
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Video.Codec.from_codecs(playlist.stream_info.codecs)
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except ValueError:
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primary_track_type = Audio
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else:
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primary_track_type = Video
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tracks.add(primary_track_type(
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id_=hex(crc32(str(playlist).encode()))[2:],
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url=urljoin(playlist.base_uri, playlist.uri),
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codec=primary_track_type.Codec.from_codecs(playlist.stream_info.codecs),
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language=language, # HLS manifests do not seem to have language info
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is_original_lang=True, # TODO: All we can do is assume Yes
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bitrate=playlist.stream_info.average_bandwidth or playlist.stream_info.bandwidth,
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descriptor=Video.Descriptor.HLS,
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drm=session_drm,
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data={
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"hls": {
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"playlist": playlist
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}
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},
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# video track args
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**(dict(
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range_=Video.Range.DV if any(
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codec.split(".")[0] in ("dva1", "dvav", "dvhe", "dvh1")
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for codec in playlist.stream_info.codecs.lower().split(",")
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) else Video.Range.from_m3u_range_tag(playlist.stream_info.video_range),
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width=playlist.stream_info.resolution[0],
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height=playlist.stream_info.resolution[1],
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fps=playlist.stream_info.frame_rate
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) if primary_track_type is Video else {})
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))
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for media in self.manifest.media:
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if not media.uri:
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continue
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joc = 0
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if media.type == "AUDIO":
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track_type = Audio
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codec = audio_codecs_by_group_id.get(media.group_id)
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if media.channels and media.channels.endswith("/JOC"):
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joc = int(media.channels.split("/JOC")[0])
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media.channels = "5.1"
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else:
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track_type = Subtitle
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codec = Subtitle.Codec.WebVTT # assuming WebVTT, codec info isn't shown
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track_lang = next((
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Language.get(option)
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for x in (media.language, language)
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for option in [(str(x) or "").strip()]
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if tag_is_valid(option) and not option.startswith("und")
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), None)
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if not track_lang:
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msg = "Language information could not be derived for a media."
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if language is None:
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msg += " No fallback language was provided when calling HLS.to_tracks()."
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elif not tag_is_valid((str(language) or "").strip()) or str(language).startswith("und"):
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msg += f" The fallback language provided is also invalid: {language}"
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raise ValueError(msg)
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tracks.add(track_type(
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id_=hex(crc32(str(media).encode()))[2:],
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url=urljoin(media.base_uri, media.uri),
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codec=codec,
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language=track_lang, # HLS media may not have language info, fallback if needed
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is_original_lang=language and is_close_match(track_lang, [language]),
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descriptor=Audio.Descriptor.HLS,
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drm=session_drm if media.type == "AUDIO" else None,
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data={
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"hls": {
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"media": media
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}
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},
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# audio track args
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**(dict(
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bitrate=0, # TODO: M3U doesn't seem to state bitrate?
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channels=media.channels,
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joc=joc,
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descriptive="public.accessibility.describes-video" in (media.characteristics or ""),
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) if track_type is Audio else dict(
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forced=media.forced == "YES",
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sdh="public.accessibility.describes-music-and-sound" in (media.characteristics or ""),
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) if track_type is Subtitle else {})
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))
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return tracks
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@staticmethod
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def download_track(
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track: AnyTrack,
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save_path: Path,
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save_dir: Path,
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progress: partial,
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session: Optional[Session] = None,
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proxy: Optional[str] = None,
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license_widevine: Optional[Callable] = None
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) -> None:
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if not session:
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session = Session()
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elif not isinstance(session, Session):
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raise TypeError(f"Expected session to be a {Session}, not {session!r}")
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if proxy:
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session.proxies.update({
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"all": proxy
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})
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log = logging.getLogger("HLS")
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master = m3u8.loads(
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# should be an invariant m3u8 playlist URI
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session.get(track.url).text,
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uri=track.url
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)
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if not master.segments:
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log.error("Track's HLS playlist has no segments, expecting an invariant M3U8 playlist.")
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sys.exit(1)
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if track.drm:
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# TODO: What if we don't want to use the first DRM system?
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session_drm = track.drm[0]
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if isinstance(session_drm, Widevine):
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# license and grab content keys
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try:
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if not license_widevine:
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raise ValueError("license_widevine func must be supplied to use Widevine DRM")
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progress(downloaded="LICENSING")
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license_widevine(session_drm)
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progress(downloaded="[yellow]LICENSED")
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except Exception: # noqa
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DOWNLOAD_CANCELLED.set() # skip pending track downloads
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progress(downloaded="[red]FAILED")
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raise
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else:
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session_drm = None
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unwanted_segments = [
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segment for segment in master.segments
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if callable(track.OnSegmentFilter) and track.OnSegmentFilter(segment)
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]
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total_segments = len(master.segments) - len(unwanted_segments)
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progress(total=total_segments)
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downloader_ = downloader
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urls: list[dict[str, Any]] = []
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range_offset = 0
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for segment in master.segments:
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if segment in unwanted_segments:
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continue
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if segment.byterange:
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if downloader_.__name__ == "aria2c":
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# aria2(c) is shit and doesn't support the Range header, fallback to the requests downloader
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downloader_ = requests_downloader
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byte_range = HLS.calculate_byte_range(segment.byterange, range_offset)
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range_offset = byte_range.split("-")[0]
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else:
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byte_range = None
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urls.append({
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"url": urljoin(segment.base_uri, segment.uri),
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"headers": {
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"Range": f"bytes={byte_range}"
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} if byte_range else {}
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})
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segment_save_dir = save_dir / "segments"
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for status_update in downloader_(
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urls=urls,
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output_dir=segment_save_dir,
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filename="{i:0%d}{ext}" % len(str(len(urls))),
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headers=session.headers,
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cookies=session.cookies,
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proxy=proxy,
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max_workers=16
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):
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file_downloaded = status_update.get("file_downloaded")
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if file_downloaded and callable(track.OnSegmentDownloaded):
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track.OnSegmentDownloaded(file_downloaded)
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else:
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downloaded = status_update.get("downloaded")
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if downloaded and downloaded.endswith("/s"):
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status_update["downloaded"] = f"HLS {downloaded}"
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progress(**status_update)
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progress(total=total_segments, completed=0, downloaded="Merging")
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name_len = len(str(total_segments))
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discon_i = 0
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range_offset = 0
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map_data: Optional[tuple[m3u8.model.InitializationSection, bytes]] = None
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if session_drm:
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encryption_data: Optional[tuple[Optional[m3u8.Key], DRM_T]] = (None, session_drm)
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else:
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encryption_data: Optional[tuple[Optional[m3u8.Key], DRM_T]] = None
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i = -1
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for real_i, segment in enumerate(master.segments):
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if segment not in unwanted_segments:
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i += 1
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is_last_segment = (real_i + 1) == len(master.segments)
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def merge(to: Path, via: list[Path], delete: bool = False, include_map_data: bool = False):
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"""
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Merge all files to a given path, optionally including map data.
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Parameters:
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to: The output file with all merged data.
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via: List of files to merge, in sequence.
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delete: Delete the file once it's been merged.
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include_map_data: Whether to include the init map data.
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"""
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with open(to, "wb") as x:
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if include_map_data and map_data and map_data[1]:
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x.write(map_data[1])
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for file in via:
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x.write(file.read_bytes())
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x.flush()
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if delete:
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file.unlink()
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def decrypt(include_this_segment: bool) -> Path:
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"""
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Decrypt all segments that uses the currently set DRM.
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All segments that will be decrypted with this DRM will be merged together
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in sequence, prefixed with the init data (if any), and then deleted. Once
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merged they will be decrypted. The merged and decrypted file names state
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the range of segments that were used.
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Parameters:
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include_this_segment: Whether to include the current segment in the
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list of segments to merge and decrypt. This should be False if
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decrypting on EXT-X-KEY changes, or True when decrypting on the
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last segment.
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Returns the decrypted path.
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"""
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drm = encryption_data[1]
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first_segment_i = next(
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int(file.stem)
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for file in sorted(segment_save_dir.iterdir())
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if file.stem.isdigit()
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)
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last_segment_i = max(0, i - int(not include_this_segment))
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range_len = (last_segment_i - first_segment_i) + 1
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segment_range = f"{str(first_segment_i).zfill(name_len)}-{str(last_segment_i).zfill(name_len)}"
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merged_path = segment_save_dir / f"{segment_range}{get_extension(master.segments[last_segment_i].uri)}"
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decrypted_path = segment_save_dir / f"{merged_path.stem}_decrypted{merged_path.suffix}"
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files = [
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file
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for file in sorted(segment_save_dir.iterdir())
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if file.stem.isdigit() and first_segment_i <= int(file.stem) <= last_segment_i
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]
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if not files:
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raise ValueError(f"None of the segment files for {segment_range} exist...")
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elif len(files) != range_len:
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raise ValueError(f"Missing {range_len - len(files)} segment files for {segment_range}...")
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merge(
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to=merged_path,
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via=files,
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delete=True,
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include_map_data=True
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)
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drm.decrypt(merged_path)
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merged_path.rename(decrypted_path)
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if callable(track.OnDecrypted):
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track.OnDecrypted(drm, decrypted_path)
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return decrypted_path
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def merge_discontinuity(include_this_segment: bool, include_map_data: bool = True):
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"""
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Merge all segments of the discontinuity.
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All segment files for this discontinuity must already be downloaded and
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already decrypted (if it needs to be decrypted).
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Parameters:
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include_this_segment: Whether to include the current segment in the
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list of segments to merge and decrypt. This should be False if
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decrypting on EXT-X-KEY changes, or True when decrypting on the
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last segment.
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include_map_data: Whether to prepend the init map data before the
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segment files when merging.
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"""
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last_segment_i = max(0, i - int(not include_this_segment))
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files = [
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file
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for file in sorted(segment_save_dir.iterdir())
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if int(file.stem.replace("_decrypted", "").split("-")[-1]) <= last_segment_i
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]
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if files:
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to_dir = segment_save_dir.parent
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to_path = to_dir / f"{str(discon_i).zfill(name_len)}{files[-1].suffix}"
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merge(
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to=to_path,
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via=files,
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delete=True,
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include_map_data=include_map_data
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)
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if segment not in unwanted_segments:
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if isinstance(track, Subtitle):
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segment_file_ext = get_extension(segment.uri)
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segment_file_path = segment_save_dir / f"{str(i).zfill(name_len)}{segment_file_ext}"
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segment_data = try_ensure_utf8(segment_file_path.read_bytes())
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if track.codec not in (Subtitle.Codec.fVTT, Subtitle.Codec.fTTML):
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segment_data = segment_data.decode("utf8"). \
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replace("‎", html.unescape("‎")). \
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replace("‏", html.unescape("‏")). \
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encode("utf8")
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segment_file_path.write_bytes(segment_data)
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if segment.discontinuity and i != 0:
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if encryption_data:
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decrypt(include_this_segment=False)
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merge_discontinuity(
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include_this_segment=False,
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include_map_data=not encryption_data or not encryption_data[1]
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)
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discon_i += 1
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range_offset = 0 # TODO: Should this be reset or not?
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map_data = None
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if encryption_data:
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encryption_data = (encryption_data[0], encryption_data[1])
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if segment.init_section and (not map_data or segment.init_section != map_data[0]):
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if segment.init_section.byterange:
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init_byte_range = HLS.calculate_byte_range(
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segment.init_section.byterange,
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range_offset
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)
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range_offset = init_byte_range.split("-")[0]
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init_range_header = {
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"Range": f"bytes={init_byte_range}"
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}
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else:
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init_range_header = {}
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res = session.get(
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url=urljoin(segment.init_section.base_uri, segment.init_section.uri),
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headers=init_range_header
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)
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res.raise_for_status()
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map_data = (segment.init_section, res.content)
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if segment.keys:
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key = HLS.get_supported_key(segment.keys)
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if encryption_data and encryption_data[0] != key and i != 0 and segment not in unwanted_segments:
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decrypt(include_this_segment=False)
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if key is None:
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encryption_data = None
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elif not encryption_data or encryption_data[0] != key:
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drm = HLS.get_drm(key, proxy)
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if isinstance(drm, Widevine):
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try:
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if map_data:
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track_kid = track.get_key_id(map_data[1])
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else:
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track_kid = None
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progress(downloaded="LICENSING")
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license_widevine(drm, track_kid=track_kid)
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progress(downloaded="[yellow]LICENSED")
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except Exception: # noqa
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DOWNLOAD_CANCELLED.set() # skip pending track downloads
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progress(downloaded="[red]FAILED")
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raise
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encryption_data = (key, drm)
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# TODO: This wont work as we already downloaded
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if DOWNLOAD_LICENCE_ONLY.is_set():
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continue
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if is_last_segment:
|
|
# required as it won't end with EXT-X-DISCONTINUITY nor a new key
|
|
if encryption_data:
|
|
decrypt(include_this_segment=True)
|
|
merge_discontinuity(
|
|
include_this_segment=True,
|
|
include_map_data=not encryption_data or not encryption_data[1]
|
|
)
|
|
|
|
progress(advance=1)
|
|
|
|
# TODO: Again still wont work, we've already downloaded
|
|
if DOWNLOAD_LICENCE_ONLY.is_set():
|
|
return
|
|
|
|
# finally merge all the discontinuity save files together to the final path
|
|
progress(downloaded="Merging")
|
|
if isinstance(track, (Video, Audio)):
|
|
HLS.merge_segments(
|
|
segments=sorted(list(save_dir.iterdir())),
|
|
save_path=save_path
|
|
)
|
|
shutil.rmtree(save_dir)
|
|
else:
|
|
with open(save_path, "wb") as f:
|
|
for discontinuity_file in sorted(save_dir.iterdir()):
|
|
if discontinuity_file.is_dir():
|
|
continue
|
|
discontinuity_data = discontinuity_file.read_bytes()
|
|
f.write(discontinuity_data)
|
|
f.flush()
|
|
shutil.rmtree(save_dir)
|
|
|
|
progress(downloaded="Downloaded")
|
|
|
|
track.path = save_path
|
|
if callable(track.OnDownloaded):
|
|
track.OnDownloaded()
|
|
|
|
@staticmethod
|
|
def merge_segments(segments: list[Path], save_path: Path) -> int:
|
|
"""
|
|
Concatenate Segments by first demuxing with FFmpeg.
|
|
|
|
Returns the file size of the merged file.
|
|
"""
|
|
ffmpeg = get_binary_path("ffmpeg")
|
|
if not ffmpeg:
|
|
raise EnvironmentError("FFmpeg executable was not found but is required to merge HLS segments.")
|
|
|
|
demuxer_file = segments[0].parent / "ffmpeg_concat_demuxer.txt"
|
|
demuxer_file.write_text("\n".join([
|
|
f"file '{segment}'"
|
|
for segment in segments
|
|
]))
|
|
|
|
subprocess.check_call([
|
|
ffmpeg, "-hide_banner",
|
|
"-loglevel", "panic",
|
|
"-f", "concat",
|
|
"-safe", "0",
|
|
"-i", demuxer_file,
|
|
"-map", "0",
|
|
"-c", "copy",
|
|
save_path
|
|
])
|
|
demuxer_file.unlink()
|
|
|
|
return save_path.stat().st_size
|
|
|
|
@staticmethod
|
|
def get_supported_key(keys: list[Union[m3u8.model.SessionKey, m3u8.model.Key]]) -> Optional[m3u8.Key]:
|
|
"""
|
|
Get a support Key System from a list of Key systems.
|
|
|
|
Note that the key systems are chosen in an opinionated order.
|
|
|
|
Returns None if one of the key systems is method=NONE, which means all segments
|
|
from hence forth should be treated as plain text until another key system is
|
|
encountered, unless it's also method=NONE.
|
|
|
|
Raises NotImplementedError if none of the key systems are supported.
|
|
"""
|
|
if any(key.method == "NONE" for key in keys):
|
|
return None
|
|
|
|
unsupported_systems = []
|
|
for key in keys:
|
|
if not key:
|
|
continue
|
|
# TODO: Add a way to specify which supported key system to use
|
|
# TODO: Add support for 'SAMPLE-AES', 'AES-CTR', 'AES-CBC', 'ClearKey'
|
|
# if encryption_data and encryption_data[0] == key:
|
|
# # no need to re-obtain the exact same encryption data
|
|
# break
|
|
elif key.method == "AES-128":
|
|
return key
|
|
# # TODO: Use a session instead of creating a new connection within
|
|
# encryption_data = (key, ClearKey.from_m3u_key(key, proxy))
|
|
# break
|
|
elif key.method == "ISO-23001-7":
|
|
return key
|
|
# encryption_data = (key, Widevine(
|
|
# pssh=PSSH.new(
|
|
# key_ids=[key.uri.split(",")[-1]],
|
|
# system_id=PSSH.SystemId.Widevine
|
|
# )
|
|
# ))
|
|
# break
|
|
elif key.keyformat and key.keyformat.lower() == WidevineCdm.urn:
|
|
return key
|
|
# encryption_data = (key, Widevine(
|
|
# pssh=PSSH(key.uri.split(",")[-1]),
|
|
# **key._extra_params # noqa
|
|
# ))
|
|
# break
|
|
else:
|
|
unsupported_systems.append(key.method + (f" ({key.keyformat})" if key.keyformat else ""))
|
|
else:
|
|
raise NotImplementedError(f"None of the key systems are supported: {', '.join(unsupported_systems)}")
|
|
|
|
@staticmethod
|
|
def get_drm(
|
|
key: Union[m3u8.model.SessionKey, m3u8.model.Key],
|
|
proxy: Optional[str] = None
|
|
) -> DRM_T:
|
|
"""
|
|
Convert HLS EXT-X-KEY data to an initialized DRM object.
|
|
|
|
Parameters:
|
|
key: m3u8 key system (EXT-X-KEY) object.
|
|
proxy: Optional proxy string used for requesting AES-128 URIs.
|
|
|
|
Raises a NotImplementedError if the key system is not supported.
|
|
"""
|
|
# TODO: Add support for 'SAMPLE-AES', 'AES-CTR', 'AES-CBC', 'ClearKey'
|
|
if key.method == "AES-128":
|
|
# TODO: Use a session instead of creating a new connection within
|
|
drm = ClearKey.from_m3u_key(key, proxy)
|
|
elif key.method == "ISO-23001-7":
|
|
drm = Widevine(
|
|
pssh=PSSH.new(
|
|
key_ids=[key.uri.split(",")[-1]],
|
|
system_id=PSSH.SystemId.Widevine
|
|
)
|
|
)
|
|
elif key.keyformat and key.keyformat.lower() == WidevineCdm.urn:
|
|
drm = Widevine(
|
|
pssh=PSSH(key.uri.split(",")[-1]),
|
|
**key._extra_params # noqa
|
|
)
|
|
else:
|
|
raise NotImplementedError(f"The key system is not supported: {key}")
|
|
|
|
return drm
|
|
|
|
@staticmethod
|
|
def get_all_drm(
|
|
keys: list[Union[m3u8.model.SessionKey, m3u8.model.Key]],
|
|
proxy: Optional[str] = None
|
|
) -> list[DRM_T]:
|
|
"""
|
|
Convert HLS EXT-X-KEY data to initialized DRM objects.
|
|
|
|
Parameters:
|
|
keys: m3u8 key system (EXT-X-KEY) objects.
|
|
proxy: Optional proxy string used for requesting AES-128 URIs.
|
|
|
|
Raises a NotImplementedError if none of the key systems are supported.
|
|
"""
|
|
unsupported_keys: list[m3u8.Key] = []
|
|
drm_objects: list[DRM_T] = []
|
|
|
|
if any(key.method == "NONE" for key in keys):
|
|
return []
|
|
|
|
for key in keys:
|
|
try:
|
|
drm = HLS.get_drm(key, proxy)
|
|
drm_objects.append(drm)
|
|
except NotImplementedError:
|
|
unsupported_keys.append(key)
|
|
|
|
if not drm_objects and unsupported_keys:
|
|
raise NotImplementedError(f"None of the key systems are supported: {unsupported_keys}")
|
|
|
|
return drm_objects
|
|
|
|
@staticmethod
|
|
def calculate_byte_range(m3u_range: str, fallback_offset: int = 0) -> str:
|
|
"""
|
|
Convert a HLS EXT-X-BYTERANGE value to a more traditional range value.
|
|
E.g., '1433@0' -> '0-1432', '357392@1433' -> '1433-358824'.
|
|
"""
|
|
parts = [int(x) for x in m3u_range.split("@")]
|
|
if len(parts) != 2:
|
|
parts.append(fallback_offset)
|
|
length, offset = parts
|
|
return f"{offset}-{offset + length - 1}"
|
|
|
|
|
|
__all__ = ("HLS",)
|