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89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
# This file is part of beets.
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# Copyright 2016, aroquen
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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"""Determine BPM by pressing a key to the rhythm."""
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import time
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from beets import ui
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from beets.plugins import BeetsPlugin
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def bpm(max_strokes):
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"""Returns average BPM (possibly of a playing song)
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listening to Enter keystrokes.
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"""
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t0 = None
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dt = []
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for i in range(max_strokes):
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# Press enter to the rhythm...
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s = input()
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if s == "":
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t1 = time.time()
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# Only start measuring at the second stroke
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if t0:
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dt.append(t1 - t0)
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t0 = t1
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else:
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break
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# Return average BPM
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# bpm = (max_strokes-1) / sum(dt) * 60
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ave = sum([1.0 / dti * 60 for dti in dt]) / len(dt)
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return ave
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class BPMPlugin(BeetsPlugin):
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def __init__(self):
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super().__init__()
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self.config.add(
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{
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"max_strokes": 3,
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"overwrite": True,
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}
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)
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def commands(self):
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cmd = ui.Subcommand(
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"bpm",
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help="determine bpm of a song by pressing a key to the rhythm",
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)
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cmd.func = self.command
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return [cmd]
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def command(self, lib, opts, args):
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write = ui.should_write()
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self.get_bpm(lib.items(args), write)
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def get_bpm(self, items, write=False):
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overwrite = self.config["overwrite"].get(bool)
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if len(items) > 1:
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raise ValueError("Can only get bpm of one song at time")
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item = items[0]
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if item["bpm"]:
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self._log.info("Found bpm {}", item["bpm"])
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if not overwrite:
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return
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self._log.info(
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"Press Enter {} times to the rhythm or Ctrl-D to exit",
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self.config["max_strokes"].get(int),
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)
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new_bpm = bpm(self.config["max_strokes"].get(int))
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item["bpm"] = int(new_bpm)
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if write:
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item.try_write()
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item.store()
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self._log.info("Added new bpm {}", item["bpm"])
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