mirror of
https://github.com/l1ving/youtube-dl
synced 2024-11-26 02:52:52 +08:00
dcddc10a50
From now on, the line from __future__ import unicode_literals should be contained in every single Python file lest we run into any more 2.x/3.x issues. Going forward, we're likely to develop on 3.x only and would likely miss subtle bugs otherwise.
52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
from __future__ import unicode_literals
|
|
|
|
from ..utils import PostProcessingError
|
|
|
|
|
|
class PostProcessor(object):
|
|
"""Post Processor class.
|
|
|
|
PostProcessor objects can be added to downloaders with their
|
|
add_post_processor() method. When the downloader has finished a
|
|
successful download, it will take its internal chain of PostProcessors
|
|
and start calling the run() method on each one of them, first with
|
|
an initial argument and then with the returned value of the previous
|
|
PostProcessor.
|
|
|
|
The chain will be stopped if one of them ever returns None or the end
|
|
of the chain is reached.
|
|
|
|
PostProcessor objects follow a "mutual registration" process similar
|
|
to InfoExtractor objects.
|
|
"""
|
|
|
|
_downloader = None
|
|
|
|
def __init__(self, downloader=None):
|
|
self._downloader = downloader
|
|
|
|
def set_downloader(self, downloader):
|
|
"""Sets the downloader for this PP."""
|
|
self._downloader = downloader
|
|
|
|
def run(self, information):
|
|
"""Run the PostProcessor.
|
|
|
|
The "information" argument is a dictionary like the ones
|
|
composed by InfoExtractors. The only difference is that this
|
|
one has an extra field called "filepath" that points to the
|
|
downloaded file.
|
|
|
|
This method returns a tuple, the first element of which describes
|
|
whether the original file should be kept (i.e. not deleted - None for
|
|
no preference), and the second of which is the updated information.
|
|
|
|
In addition, this method may raise a PostProcessingError
|
|
exception if post processing fails.
|
|
"""
|
|
return None, information # by default, keep file and do nothing
|
|
|
|
|
|
class AudioConversionError(PostProcessingError):
|
|
pass
|