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bazarr/libs/knowit/rules/audio/channels.py
2020-03-18 15:33:54 -04:00

57 lines
1.4 KiB
Python

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from logging import NullHandler, getLogger
from six import text_type
from ...rule import Rule
logger = getLogger(__name__)
logger.addHandler(NullHandler())
class AudioChannelsRule(Rule):
"""Audio Channel rule."""
mapping = {
1: '1.0',
2: '2.0',
6: '5.1',
8: '7.1',
}
def execute(self, props, pv_props, context):
"""Execute the rule against properties."""
count = props.get('channels_count')
if count is None:
return
channels = self.mapping.get(count) if isinstance(count, int) else None
positions = pv_props.get('channel_positions') or []
positions = positions if isinstance(positions, list) else [positions]
candidate = 0
for position in positions:
if not position:
continue
c = 0
for i in position.split('/'):
try:
c += float(i)
except ValueError:
logger.debug('Invalid %s: %s', self.description, i)
pass
c_count = int(c) + int(round((c - int(c)) * 10))
if c_count == count:
return text_type(c)
candidate = max(candidate, c)
if channels:
return channels
if candidate:
return text_type(candidate)
self.report(positions, context)