mirror of
https://github.com/beetbox/beets.git
synced 2025-12-06 16:42:42 +01:00
85 lines
2.8 KiB
Python
85 lines
2.8 KiB
Python
# This file is part of beets.
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining
|
|
# a copy of this software and associated documentation files (the
|
|
# "Software"), to deal in the Software without restriction, including
|
|
# without limitation the rights to use, copy, modify, merge, publish,
|
|
# distribute, sublicense, and/or sell copies of the Software, and to
|
|
# permit persons to whom the Software is furnished to do so, subject to
|
|
# the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be
|
|
# included in all copies or substantial portions of the Software.
|
|
|
|
"""Uses Librosa to calculate the `bpm` field."""
|
|
|
|
from __future__ import annotations
|
|
|
|
from collections.abc import Iterable
|
|
from typing import TYPE_CHECKING
|
|
|
|
import librosa
|
|
|
|
from beets.plugins import BeetsPlugin
|
|
from beets.ui import Subcommand, should_write
|
|
|
|
if TYPE_CHECKING:
|
|
from beets.importer import ImportTask
|
|
from beets.library import Item, Library
|
|
|
|
|
|
class AutoBPMPlugin(BeetsPlugin):
|
|
def __init__(self) -> None:
|
|
super().__init__()
|
|
self.config.add(
|
|
{
|
|
"auto": True,
|
|
"overwrite": False,
|
|
"beat_track_kwargs": {},
|
|
}
|
|
)
|
|
|
|
if self.config["auto"]:
|
|
self.import_stages = [self.imported]
|
|
|
|
def commands(self) -> list[Subcommand]:
|
|
cmd = Subcommand(
|
|
"autobpm", help="detect and add bpm from audio using Librosa"
|
|
)
|
|
cmd.func = self.command
|
|
return [cmd]
|
|
|
|
def command(self, lib: Library, _, args: list[str]) -> None:
|
|
self.calculate_bpm(list(lib.items(args)), write=should_write())
|
|
|
|
def imported(self, _, task: ImportTask) -> None:
|
|
self.calculate_bpm(task.imported_items())
|
|
|
|
def calculate_bpm(self, items: list[Item], write: bool = False) -> None:
|
|
for item in items:
|
|
path = item.filepath
|
|
if bpm := item.bpm:
|
|
self._log.info("BPM for {} already exists: {}", path, bpm)
|
|
if not self.config["overwrite"]:
|
|
continue
|
|
|
|
try:
|
|
y, sr = librosa.load(item.filepath, res_type="kaiser_fast")
|
|
except Exception as exc:
|
|
self._log.error("Failed to load {}: {}", path, exc)
|
|
continue
|
|
|
|
kwargs = self.config["beat_track_kwargs"].flatten()
|
|
try:
|
|
tempo, _ = librosa.beat.beat_track(y=y, sr=sr, **kwargs)
|
|
except Exception as exc:
|
|
self._log.error("Failed to measure BPM for {}: {}", path, exc)
|
|
continue
|
|
|
|
bpm = round(tempo[0] if isinstance(tempo, Iterable) else tempo)
|
|
item["bpm"] = bpm
|
|
self._log.info("Computed BPM for {}: {}", path, bpm)
|
|
|
|
if write:
|
|
item.try_write()
|
|
item.store()
|