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eReader Metadata: Extract cover.

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This commit is contained in:
John Schember 2009-12-03 20:06:46 -05:00
parent 5574f36c75
commit 56fd576055
3 changed files with 43 additions and 21 deletions
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19
src/calibre/ebooks/metadata/ereader.py
View File

@ -16,6 +16,18 @@ from calibre.ebooks.pdb.ereader.reader132 import HeaderRecord
from calibre.ebooks.pdb.header import PdbHeaderBuilder
from calibre.ebooks.pdb.header import PdbHeaderReader
def get_cover(pheader, eheader):
cover_data = None
for i in range(eheader.image_count):
raw = pheader.section_data(eheader.image_data_offset + i)
if raw[4:4 + 32].strip('\x00') == 'cover.png':
cover_data = raw[62:]
break
return ('png', cover_data)
def get_metadata(stream, extract_cover=True):
"""
Return metadata as a L{MetaInfo} object
@ -29,7 +41,7 @@ def get_metadata(stream, extract_cover=True):
if len(pheader.section_data(0)) == 132:
hr = HeaderRecord(pheader.section_data(0))
if hr.version in (2, 10) and hr.has_metadata == 1:
if hr.compression in (2, 10) and hr.has_metadata == 1:
try:
mdata = pheader.section_data(hr.metadata_offset)
@ -41,6 +53,9 @@ def get_metadata(stream, extract_cover=True):
except:
pass
if extract_cover:
mi.cover_data = get_cover(pheader, hr)
if not mi.title:
mi.title = pheader.title if pheader.title else _('Unknown')
@ -56,7 +71,7 @@ def set_metadata(stream, mi):
sections = [pheader.section_data(x) for x in range(0, pheader.section_count())]
hr = HeaderRecord(sections[0])
if hr.version not in (2, 10):
if hr.compression not in (2, 10):
return
# Create a metadata record for the file if one does not alreay exist

31
src/calibre/ebooks/pdb/ereader/reader132.py
View File

@ -29,12 +29,19 @@ class HeaderRecord(object):
'''
def __init__(self, raw):
self.version, = struct.unpack('>H', raw[0:2])
self.compression, = struct.unpack('>H', raw[0:2])
self.non_text_offset, = struct.unpack('>H', raw[12:14])
self.chapter_count, = struct.unpack('>H', raw[14:16])
self.image_count, = struct.unpack('>H', raw[20:22])
self.link_count, = struct.unpack('>H', raw[22:24])
self.has_metadata, = struct.unpack('>H', raw[24:26])
self.footnote_rec, = struct.unpack('>H', raw[28:30])
self.sidebar_rec, = struct.unpack('>H', raw[30:32])
self.footnote_count, = struct.unpack('>H', raw[28:30])
self.sidebar_count, = struct.unpack('>H', raw[30:32])
self.chapter_offset, = struct.unpack('>H', raw[32:34])
self.small_font_page_offset, = struct.unpack('>H', raw[36:38])
self.large_font_page_offset, = struct.unpack('>H', raw[38:40])
self.image_data_offset, = struct.unpack('>H', raw[40:42])
self.link_offset, = struct.unpack('>H', raw[42:44])
self.metadata_offset, = struct.unpack('>H', raw[44:46])
self.footnote_offset, = struct.unpack('>H', raw[48:50])
self.sidebar_offset, = struct.unpack('>H', raw[50:52])
@ -58,11 +65,11 @@ class Reader132(FormatReader):
self.header_record = HeaderRecord(self.section_data(0))
if self.header_record.version not in (2, 10):
if self.header_record.version in (260, 272):
if self.header_record.compression not in (2, 10):
if self.header_record.compression in (260, 272):
raise DRMError('eReader DRM is not supported.')
else:
raise EreaderError('Unknown book version %i.' % self.header_record.version)
raise EreaderError('Unknown book compression %i.' % self.header_record.compression)
from calibre.ebooks.metadata.pdb import get_metadata
self.mi = get_metadata(stream, False)
@ -71,9 +78,9 @@ class Reader132(FormatReader):
return self.sections[number]
def decompress_text(self, number):
if self.header_record.version == 2:
if self.header_record.compression == 2:
return decompress_doc(self.section_data(number)).decode('cp1252' if self.encoding is None else self.encoding, 'replace')
if self.header_record.version == 10:
if self.header_record.compression == 10:
return zlib.decompress(self.section_data(number)).decode('cp1252' if self.encoding is None else self.encoding, 'replace')
def get_image(self, number):
@ -115,19 +122,19 @@ class Reader132(FormatReader):
pml += self.get_text_page(i)
html += pml_to_html(pml)
if self.header_record.footnote_rec > 0:
if self.header_record.footnote_count > 0:
html += '<br /><h1>%s</h1>' % _('Footnotes')
footnoteids = re.findall('\w+(?=\x00)', self.section_data(self.header_record.footnote_offset).decode('cp1252' if self.encoding is None else self.encoding))
for fid, i in enumerate(range(self.header_record.footnote_offset + 1, self.header_record.footnote_offset + self.header_record.footnote_rec)):
for fid, i in enumerate(range(self.header_record.footnote_offset + 1, self.header_record.footnote_offset + self.header_record.footnote_count)):
self.log.debug('Extracting footnote page %i' % i)
html += '<dl>'
html += footnote_sidebar_to_html(footnoteids[fid], self.decompress_text(i))
html += '</dl>'
if self.header_record.sidebar_rec > 0:
if self.header_record.sidebar_count > 0:
html += '<br /><h1>%s</h1>' % _('Sidebar')
sidebarids = re.findall('\w+(?=\x00)', self.section_data(self.header_record.sidebar_offset).decode('cp1252' if self.encoding is None else self.encoding))
for sid, i in enumerate(range(self.header_record.sidebar_offset + 1, self.header_record.sidebar_offset + self.header_record.sidebar_rec)):
for sid, i in enumerate(range(self.header_record.sidebar_offset + 1, self.header_record.sidebar_offset + self.header_record.sidebar_count)):
self.log.debug('Extracting sidebar page %i' % i)
html += '<dl>'
html += footnote_sidebar_to_html(sidebarids[sid], self.decompress_text(i))