/
MetadataIdentifier.py
executable file
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/
MetadataIdentifier.py
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# YouTubeMDBot
# Copyright (C) 2019 - Javinator9889
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
try:
import ujson as json
except ImportError:
import json
import acoustid
import musicbrainzngs
from ..audio import FPCalc
from ..api import YouTubeAPI
from ..utils import youtube_utils
from ..constants import ACOUSTID_KEY
from ..downloader import YouTubeDownloader
class MetadataIdentifier:
"""
Base identifier class. By using the audio data, calculates and generates a
fingerprint for searching across the MusicBrainz database.
Once the audio has been identified, the available params and information are:
- audio (bytes)
- result (json)
- artist (str)
- title (str)
- release_id (str)
- recording_id (str)
- score (float)
- cover (bytes)
- album (str)
- duration (int)
- youtube_data (bool)
- youtube_id (str)
"""
def __init__(self, audio: bytes):
"""
Generates a new instance of the MetadataIdentifier class.
:param audio: the audio data, in bytes.
"""
self.audio = audio
self.result: json = None
self.artist: str = ""
self.title: str = ""
self.release_id: str = ""
self.recording_id: str = ""
self.score: float = 0.0
self.cover: bytes = bytes(0)
self.album: str = ""
self.duration: int = 0
self.youtube_data: bool = False
self.youtube_id: str = ""
@staticmethod
def _is_valid_result(data: json) -> bool:
"""
Checks whether the obtained result, in json, is valid or not, by checking for
certain keys that must exist.
:param data: the result in json.
:return: 'True' if the result is valid, else 'False'.
"""
if "results" not in data:
return False
elif data["status"] != "ok":
return False
elif len(data["results"]) == 0:
return False
else:
if "recordings" not in data["results"][0]:
return False
else:
return True
def identify_audio(self) -> bool:
"""
Tries to identify the audio by using the audio fingerprint. If the audio has
been successfully identified, then obtains all the data related to it.
:return: 'True' if the result is valid (the audio was correctly identified),
else 'False'.
"""
fp_calc = FPCalc(self.audio)
data: json = acoustid.lookup(apikey=ACOUSTID_KEY,
fingerprint=fp_calc.fingerprint,
duration=fp_calc.duration,
meta="recordings releaseids releasegroups")
self.result = data
is_valid = self._is_valid_result(data)
if is_valid:
for result in data["results"]:
if "recordings" not in result:
break
self.score = result["score"]
for recording in result["recordings"]:
if recording.get("artists"):
names = [artist["name"] for artist in recording["artists"]]
self.artist = "; ".join(names)
else:
self.artist = "Unknown"
self.title = recording["title"]
if recording.get("releasegroups"):
self.release_id = \
recording["releasegroups"][0]["releases"][0]["id"]
self.album = recording["releasegroups"][0]["title"]
self.cover = musicbrainzngs.get_image_front(
self.release_id)
self.recording_id = recording["id"]
self.duration = recording["duration"]
is_valid = True
break
break
return is_valid
def __str__(self):
return f"Title: {self.title}\n" \
f"Artist: {self.artist}\n" \
f"Release ID: {self.release_id}\n" \
f"Recording ID: {self.recording_id}\n" \
f"Score: {self.score}\n" \
f"Cover [length]: {len(self.cover)}\n" \
f"Album: {self.album}\n" \
f"Duration: {self.duration}\n" \
f"Is YT data?: {self.youtube_data}\n" \
f"YT ID: {self.youtube_id}"
class YouTubeMetadataIdentifier(MetadataIdentifier):
"""
Identifies YouTube metadata by using MusicBrainz database and YouTube metadata. If
the first identification (MusicBrainz) fails, then fallback to YouTube
identification if the "downloader" was provided.
Once the audio has been identified, the available params and information are:
- audio (bytes)
- result (json)
- artist (str)
- title (str)
- release_id (str)
- recording_id (str)
- score (float)
- cover (bytes)
- album (str)
- duration (int)
- youtube_data (bool)
- youtube_id (str)
If "youtube_data" is True, then only audio, title, artist, duration, cover and
youtube_id are available.
"""
def __init__(self, audio: bytes, downloader: YouTubeDownloader = None):
"""
Generates a new instance of the MetadataIdentifier class.
:param audio: the audio data, in bytes.
:param downloader: a downloader object, for obtaining the video information if
MusicBrainz fails.
"""
super().__init__(audio)
self._downloader = downloader
def identify_audio(self) -> bool:
valid = super().identify_audio()
if not valid:
if self._downloader:
from urllib.request import urlopen
video_id = youtube_utils.get_yt_video_id(self._downloader.url)
video_data = YouTubeAPI.video_details(video_id)
self.title = video_data.title
self.artist = video_data.artist
self.duration = video_data.duration
self.cover = urlopen(video_data.thumbnail).read()
self.youtube_id = video_data.id
self.youtube_data = True
valid = True
return valid