Will McGugan wrote:
Please implement this as a Python module. I would like to compress my mp3 collection to single bits.
here's the magic algorithm (somewhat simplified):
def algorithm(data): m = 102021 # magic constant d = [int(c) for c in str(1*2*3*4*5*m+5+4+2+1)] x = [ord(c) for c in hex(1+2+4+5+m*5*4*3*2*1)] x[d[0]*d[1]*d[2]] = x[d[-1]] + sum(d) - d[d[-d[-1]-1]] + d[0] x = __import__("".join(chr(c) for c in x[d[0]*d[1]:])).encodestring return "".join(x(data).split("\n")).rstrip("="), sum(d)-sum(reversed(d))
and here's a driver for your MP3 collection:
import glob
def compress(filename): data = open(filename, "rb").read() keycode, bit = algorithm(data) file = open(keycode + ".out", "wb") file.write(chr(bit)) file.close() print "compressed", filename, print len(data), "=>", 1, round(100.0/len(data), 3), "%"
for file in glob.glob("*.mp3"): compress(file)
</F>
Muchas gracias. Although there may be a bug. I compressed my Evanescence albumn, but after decompression it became the complete works of Charles Dickens..
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"".join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c in "jvyy*jvyyzpthtna^pbz" ] )
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