177 lines
7.8 KiB
Python
177 lines
7.8 KiB
Python
|
# -*- coding: utf-8 -*-
|
||
|
|
'''
|
||
|
|
feedgen.ext.media
|
||
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~
|
||
|
|
|
||
|
|
Extends the feedgen to produce media tags.
|
||
|
|
|
||
|
|
:copyright: 2013-2016, Lars Kiesow <lkiesow@uos.de>
|
||
|
|
|
||
|
|
:license: FreeBSD and LGPL, see license.* for more details.
|
||
|
|
'''
|
||
|
|
|
||
|
|
from lxml import etree
|
||
|
|
from feedgen.ext.base import BaseExtension, BaseEntryExtension
|
||
|
|
|
||
|
|
MEDIA_NS = 'http://search.yahoo.com/mrss/'
|
||
|
|
|
||
|
|
|
||
|
|
class MediaExtension(BaseExtension):
|
||
|
|
'''FeedGenerator extension for torrent feeds.
|
||
|
|
'''
|
||
|
|
|
||
|
|
def extend_ns(self):
|
||
|
|
return {'media': MEDIA_NS}
|
||
|
|
|
||
|
|
|
||
|
|
class MediaEntryExtension(BaseEntryExtension):
|
||
|
|
'''FeedEntry extension for media tags.
|
||
|
|
'''
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
self.__media_content = None
|
||
|
|
self.__media_thumbnail = None
|
||
|
|
|
||
|
|
def extend_atom(self, entry):
|
||
|
|
'''Add additional fields to an RSS item.
|
||
|
|
|
||
|
|
:param feed: The RSS item XML element to use.
|
||
|
|
'''
|
||
|
|
|
||
|
|
group = etree.SubElement(entry, '{%s}group' % MEDIA_NS)
|
||
|
|
if self.__media_content:
|
||
|
|
content = etree.SubElement(group, '{%s}content' % MEDIA_NS)
|
||
|
|
if self.__media_content.get('url'):
|
||
|
|
content.set('url', self.__media_content.get('url'))
|
||
|
|
if self.__media_content.get('fileSize'):
|
||
|
|
content.set('fileSize', self.__media_content.get('fileSize'))
|
||
|
|
if self.__media_content.get('type'):
|
||
|
|
content.set('type', self.__media_content.get('type'))
|
||
|
|
if self.__media_content.get('medium'):
|
||
|
|
content.set('medium', self.__media_content.get('medium'))
|
||
|
|
if self.__media_content.get('isDefault'):
|
||
|
|
content.set('isDefault', self.__media_content.get('isDefault'))
|
||
|
|
if self.__media_content.get('expression'):
|
||
|
|
content.set(
|
||
|
|
'expression', self.__media_content.get('expression'))
|
||
|
|
if self.__media_content.get('bitrate'):
|
||
|
|
content.set('bitrate', self.__media_content.get('bitrate'))
|
||
|
|
if self.__media_content.get('framerate'):
|
||
|
|
content.set('framerate', self.__media_content.get('framerate'))
|
||
|
|
if self.__media_content.get('samplingrate'):
|
||
|
|
content.set('samplingrate',
|
||
|
|
self.__media_content.get('samplingrate'))
|
||
|
|
if self.__media_content.get('channels'):
|
||
|
|
content.set('channels', self.__media_content.get('channels'))
|
||
|
|
if self.__media_content.get('duration'):
|
||
|
|
content.set('duration', self.__media_content.get('duration'))
|
||
|
|
if self.__media_content.get('height'):
|
||
|
|
content.set('height', self.__media_content.get('height'))
|
||
|
|
if self.__media_content.get('width'):
|
||
|
|
content.set('width', self.__media_content.get('width'))
|
||
|
|
if self.__media_content.get('lang'):
|
||
|
|
content.set('lang', self.__media_content.get('lang'))
|
||
|
|
if self.__media_thumbnail:
|
||
|
|
thumbnail = etree.SubElement(group, '{%s}thumbnail' % MEDIA_NS)
|
||
|
|
if self.__media_thumbnail.get('url'):
|
||
|
|
thumbnail.set('url', self.__media_thumbnail.get('url'))
|
||
|
|
if self.__media_thumbnail.get('height'):
|
||
|
|
thumbnail.set('height', self.__media_thumbnail.get('height'))
|
||
|
|
if self.__media_thumbnail.get('width'):
|
||
|
|
thumbnail.set('width', self.__media_thumbnail.get('width'))
|
||
|
|
if self.__media_thumbnail.get('lang'):
|
||
|
|
thumbnail.set('lang', self.__media_thumbnail.get('lang'))
|
||
|
|
|
||
|
|
return entry
|
||
|
|
|
||
|
|
def media_content(self, url=None, fileSize=None, type=None, medium=None,
|
||
|
|
isDefault=None, expression=None, bitrate=None,
|
||
|
|
framerate=None, samplingrate=None, channels=None,
|
||
|
|
duration=None, height=None, width=None, lang=None):
|
||
|
|
'''<media:content> is a sub-element of either <item> or <media:group>.
|
||
|
|
Media objects that are not the same content should not be included in
|
||
|
|
the same <media:group> element. The sequence of these items implies
|
||
|
|
the order of presentation. While many of the attributes appear to be
|
||
|
|
audio/video specific, this element can be used to publish any type
|
||
|
|
of media. It contains 14 attributes, most of which are optional.
|
||
|
|
|
||
|
|
:param url: should specify the direct URL to the media object.
|
||
|
|
:param fileSize: number of bytes of the media object.
|
||
|
|
:param type: standard MIME type of the object.
|
||
|
|
:param medium: type of object
|
||
|
|
(image | audio | video | document | executable).
|
||
|
|
:param isDefault: determines if this is the default object.
|
||
|
|
:param expression: determines if the object is a sample or the full
|
||
|
|
version of the object, or even if it is a
|
||
|
|
continuous stream (sample | full | nonstop).
|
||
|
|
:param bitrate: kilobits per second rate of media.
|
||
|
|
:param framerate: number of frames per second for the media object.
|
||
|
|
:param samplingrate: number of samples per second taken to create the
|
||
|
|
media object. It is expressed in thousands of
|
||
|
|
samples per second (kHz).
|
||
|
|
:param channels: number of audio channels in the media object.
|
||
|
|
:param duration: number of seconds the media object plays.
|
||
|
|
:param height: height of the media object.
|
||
|
|
:param width: width of the media object.
|
||
|
|
:param lang: is the primary language encapsulated in the media object.
|
||
|
|
|
||
|
|
:returns: The media content tag.
|
||
|
|
'''
|
||
|
|
|
||
|
|
if url is not None:
|
||
|
|
self.__media_content = {'url': url}
|
||
|
|
if fileSize is not None:
|
||
|
|
self.__media_content['fileSize'] = fileSize
|
||
|
|
if type is not None:
|
||
|
|
self.__media_content['type'] = type
|
||
|
|
if medium is not None:
|
||
|
|
self.__media_content['medium'] = medium
|
||
|
|
if isDefault is not None:
|
||
|
|
self.__media_content['isDefault'] = isDefault
|
||
|
|
if expression is not None:
|
||
|
|
self.__media_content['expression'] = expression
|
||
|
|
if bitrate is not None:
|
||
|
|
self.__media_content['bitrate'] = bitrate
|
||
|
|
if framerate is not None:
|
||
|
|
self.__media_content['framerate'] = framerate
|
||
|
|
if samplingrate is not None:
|
||
|
|
self.__media_content['samplingrate'] = samplingrate
|
||
|
|
if channels is not None:
|
||
|
|
self.__media_content['channels'] = channels
|
||
|
|
if duration is not None:
|
||
|
|
self.__media_content['duration'] = duration
|
||
|
|
if height is not None:
|
||
|
|
self.__media_content['height'] = height
|
||
|
|
if width is not None:
|
||
|
|
self.__media_content['width'] = width
|
||
|
|
if lang is not None:
|
||
|
|
self.__media_content['lang'] = lang
|
||
|
|
|
||
|
|
return self.__media_content
|
||
|
|
|
||
|
|
def media_thumbnail(self, url=None, height=None, width=None, time=None):
|
||
|
|
'''Allows particular images to be used as representative images for
|
||
|
|
the media object. If multiple thumbnails are included, and time
|
||
|
|
coding is not at play, it is assumed that the images are in order
|
||
|
|
of importance. It has one required attribute and three optional
|
||
|
|
attributes.
|
||
|
|
|
||
|
|
:param url: should specify the direct URL to the media object.
|
||
|
|
:param height: height of the media object.
|
||
|
|
:param width: width of the media object.
|
||
|
|
:param time: specifies the time offset in relation to the media object.
|
||
|
|
|
||
|
|
:returns: The media thumbnail tag.
|
||
|
|
'''
|
||
|
|
|
||
|
|
if url is not None:
|
||
|
|
self.__media_thumbnail = {'url': url}
|
||
|
|
if height is not None:
|
||
|
|
self.__media_thumbnail['height'] = height
|
||
|
|
if width is not None:
|
||
|
|
self.__media_thumbnail['width'] = width
|
||
|
|
if time is not None:
|
||
|
|
self.__media_thumbnail['time'] = time
|
||
|
|
|
||
|
|
return self.__media_thumbnail
|