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Create thumbnail images on Kindle for KFX fomrat

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This commit is contained in:
j-howell 2018-08-05 17:14:52 -04:00
parent 43242d4f1e
commit 5a4e322ab2
2 changed files with 24 additions and 3 deletions
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16
src/calibre/devices/kindle/driver.py
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@ -463,18 +463,28 @@ class KINDLE2(KINDLE):
self.upload_apnx(path, filename, metadata, filepath) self.upload_apnx(path, filename, metadata, filepath)
def thumbpath_from_filepath(self, filepath): def thumbpath_from_filepath(self, filepath):
from calibre.ebooks.metadata.kfx import (CONTAINER_MAGIC, read_book_key_kfx)
from calibre.ebooks.mobi.reader.headers import MetadataHeader from calibre.ebooks.mobi.reader.headers import MetadataHeader
from calibre.utils.logging import default_log from calibre.utils.logging import default_log
thumb_dir = os.path.join(self._main_prefix, 'system', 'thumbnails') thumb_dir = os.path.join(self._main_prefix, 'system', 'thumbnails')
if not os.path.exists(thumb_dir): if not os.path.exists(thumb_dir):
return return
with lopen(filepath, 'rb') as f: with lopen(filepath, 'rb') as f:
mh = MetadataHeader(f, default_log) is_kfx = f.read(4) == CONTAINER_MAGIC
if mh.exth is None or not mh.exth.uuid or not mh.exth.cdetype: f.seek(0)
if is_kfx:
uuid,cdetype = read_book_key_kfx(f)
else:
mh = MetadataHeader(f, default_log)
if mh.exth is None:
return
uuid = mh.exth.uuid
cdetype = mh.exth.cdetype
if not uuid or not cdetype:
return return
return os.path.join(thumb_dir, return os.path.join(thumb_dir,
'thumbnail_{uuid}_{cdetype}_portrait.jpg'.format( 'thumbnail_{uuid}_{cdetype}_portrait.jpg'.format(
uuid=mh.exth.uuid, cdetype=mh.exth.cdetype)) uuid=uuid, cdetype=cdetype))
def upload_kindle_thumbnail(self, metadata, filepath): def upload_kindle_thumbnail(self, metadata, filepath):
coverdata = getattr(metadata, 'thumbnail', None) coverdata = getattr(metadata, 'thumbnail', None)

11
src/calibre/ebooks/metadata/kfx.py
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@ -278,6 +278,17 @@ def dump_metadata(m):
pprint(d) pprint(d)
def read_book_key_kfx(stream, read_cover=True):
' Read the metadata.kfx file that is found in the sdr book folder for KFX files '
c = Container(stream.read())
m = extract_metadata(c.decode())
def val(x):
return m[x][0] if x in m else ''
return (val('content_id') or val('ASIN'), val('cde_content_type'))
def read_metadata_kfx(stream, read_cover=True): def read_metadata_kfx(stream, read_cover=True):
' Read the metadata.kfx file that is found in the sdr book folder for KFX files ' ' Read the metadata.kfx file that is found in the sdr book folder for KFX files '
c = Container(stream.read()) c = Container(stream.read())