maikandClaude Opus 4.8
a7c93fa266
Läuft die Voice Acoustic VA-Remotecontrol (AllDSP AllControl) nativ unter Linux auf echtem wxGTK 3.0 — ohne Wine und ohne dekompilierten App-Code. Ausgeführt wird das unveränderte Python-2.7-Bytecode aus dem macOS-.app; C-Extensions (wxGTK/numpy/ scipy/PortAudio) kommen nativ aus Debian stretch. Enthält: va/ (Original-.pyc + pure-Python-Libs + Assets + launch.py mit den drei Linux-Fixes), Dockerfile/run.sh/entrypoint.sh, reference/ (dekompilierter Quellcode zum Debuggen) und README/STATUS. img.cache (378 MB, regenerierbar) ist per .gitignore ausgeschlossen. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
# Utilities to Re-Use PDF files generated by FPDF for Python
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# (Probably, more memory-wasting than it should)
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import re, zlib
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def UpdateStreamLengths(pdf):
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"Updates the streams /Length in a modified, uncompressed PDF file"
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L, Lengths=[],{}
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for m in re.finditer('<</Length (\d+)(>>)\nstream\n(.+?)\nendstream',pdf,re.S):
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oldlen, newlen = m.group(1), len(m.group(3))
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if newlen!=oldlen:
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L+=[m.start(1)]
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# length_start=old_len, next_content
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Lengths[str(m.start(1))]=(str(newlen), m.start(2))
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if not L:
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return pdf
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newpdf=''
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i=0
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for j in L:
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newpdf+=pdf[i:j]
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i=Lengths[str(j)][1]
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newpdf+=Lengths[str(j)][0]
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newpdf+=pdf[i:]
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return newpdf
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def FindXRefs(pdf):
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"Returns a dictionary of {PDF object:position} found"
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XRefs={}
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for m in re.finditer('^(\d+) 0 obj',pdf,re.M):
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XRefs[int(m.group(1))] = m.start()
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return XRefs
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def BuildXRefsTable(XRefs):
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"Constructs the PDF xref table from a dictionary returned by FindXRefs"
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s='xref\n'
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s+='0 '+str(len(XRefs)+1)+'\n'
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s+='0000000000 65535 f \n'
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for i in xrange(1,len(XRefs)+1):
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s+='%010d 00000 n \n'%XRefs[i]
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return s
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def ReplaceXRefsTable(pdf, newtable):
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"Replaces the unique XRef table in a PDF file with the updated one"
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startxref=pdf.find('xref')
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newbuf=pdf[:startxref] + newtable + re.sub('\d+(?=\n%%EOF)',str(startxref), pdf[pdf.find('trailer'):])
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return newbuf
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def DecompressStreams(pdf):
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"Decompresses all deflated streams and returns the updated PDF file"
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L, streams=[], {}
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for m in re.finditer('^<</Filter /FlateDecode /Length (\d+)>>\n(stream)',pdf,re.M):
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start=m.start(2)+7
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# stream_start: filter_start, stream_end
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streams[start]=(m.start(), start+int(m.group(1)))
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L+=[start]
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delta=0
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for i in L:
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start=i+delta
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end=streams[i][1]+delta
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stream=zlib.decompress(pdf[start:end])
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before=len(pdf)
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pdf=pdf.replace(pdf[streams[i][0]+delta:end], '<</Length %d>>\nstream\n'%len(stream)+stream)
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delta+=len(pdf)-before
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return pdf
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def CompressStreams(pdf):
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"Compresses all plain streams and returns the updated PDF file"
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L, streams=[], {}
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for m in re.finditer('^<</Length (\d+)>>\n(stream)',pdf,re.M):
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start=m.start(2)+7
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# stream_start: filter_start, stream_end
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streams[start]=(m.start(), start+int(m.group(1)))
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L+=[start]
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delta=0
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for i in L:
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start=i+delta
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end=streams[i][1]+delta
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stream=zlib.compress(pdf[start:end])
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before=len(pdf)
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pdf=pdf.replace(pdf[streams[i][0]+delta:end], '<</Filter /FlateDecode /Length %d>>\nstream\n'%len(stream)+stream)
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delta+=len(pdf)-before
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return pdf
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if __name__=='__main__':
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buf=file('b.pdf','rb').read()
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newbuf=DecompressStreams(buf)
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newbuf=ReplaceXRefsTable(newbuf, BuildXRefsTable(FindXRefs(newbuf)))
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newbuf=UpdateStreamLengths(newbuf) # does nothing here: test purpose only!
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file('b0.pdf','wb').write(newbuf)
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newbuf=CompressStreams(newbuf)
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newbuf=ReplaceXRefsTable(newbuf, BuildXRefsTable(FindXRefs(newbuf)))
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file('b1.pdf','wb').write(newbuf) #should be identical
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