nzbToMedia/libs/common/beetsplug/bpm.py
2018-12-16 13:50:27 -05:00

90 lines
2.7 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of beets.
# Copyright 2016, aroquen
#
# 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.
"""Determine BPM by pressing a key to the rhythm."""
from __future__ import division, absolute_import, print_function
import time
from six.moves import input
from beets import ui
from beets.plugins import BeetsPlugin
def bpm(max_strokes):
"""Returns average BPM (possibly of a playing song)
listening to Enter keystrokes.
"""
t0 = None
dt = []
for i in range(max_strokes):
# Press enter to the rhythm...
s = input()
if s == '':
t1 = time.time()
# Only start measuring at the second stroke
if t0:
dt.append(t1 - t0)
t0 = t1
else:
break
# Return average BPM
# bpm = (max_strokes-1) / sum(dt) * 60
ave = sum([1.0 / dti * 60 for dti in dt]) / len(dt)
return ave
class BPMPlugin(BeetsPlugin):
def __init__(self):
super(BPMPlugin, self).__init__()
self.config.add({
u'max_strokes': 3,
u'overwrite': True,
})
def commands(self):
cmd = ui.Subcommand('bpm',
help=u'determine bpm of a song by pressing '
u'a key to the rhythm')
cmd.func = self.command
return [cmd]
def command(self, lib, opts, args):
items = lib.items(ui.decargs(args))
write = ui.should_write()
self.get_bpm(items, write)
def get_bpm(self, items, write=False):
overwrite = self.config['overwrite'].get(bool)
if len(items) > 1:
raise ValueError(u'Can only get bpm of one song at time')
item = items[0]
if item['bpm']:
self._log.info(u'Found bpm {0}', item['bpm'])
if not overwrite:
return
self._log.info(u'Press Enter {0} times to the rhythm or Ctrl-D '
u'to exit', self.config['max_strokes'].get(int))
new_bpm = bpm(self.config['max_strokes'].get(int))
item['bpm'] = int(new_bpm)
if write:
item.try_write()
item.store()
self._log.info(u'Added new bpm {0}', item['bpm'])