[linux-minidisc] [PATCH] downloadhack enhancements

[Matthias Mailänder <matthias@mailaender.name>]

Hallo,

This patch allows universal SP upload via USB to NetMD-Recorders. It
also includes a small howto comment. Please keep in mind that you need a
secret key to get things to work, which is not yet included due to
unknown legal status. I also commited a git branch
downloadhack-enhancements, but I don't know if that worked.

yours Matthias

>From 6b155ebd221832f64591c851d9e4e27389c0ff01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?= <matthias@mailaender.name>
Date: Sun, 18 Jul 2010 22:53:49 +0200
Subject: [PATCH] =?UTF-8?q?Committer:=20Matthias=20Mail=C3=A4nder=20<https://launchpad.net/~mailaender>
=20On=20branch=20downloadhack-enhancement
=20Changes=20to=20be=20committed:
=20	modified:=20=20=20netmd/downloadhack.py?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 netmd/downloadhack.py |   43 ++++++++++++++++++++++++++++++-------------
 1 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/netmd/downloadhack.py b/netmd/downloadhack.py
index f48f8ae..25722d0 100644
--- a/netmd/downloadhack.py
+++ b/netmd/downloadhack.py
@@ -1,9 +1,33 @@
 #!/usr/bin/python
 import os
+import sys
+import getopt
 import usb1
 import libnetmd
 from Crypto.Cipher import DES
 
+# USAGE
+#######
+# first: create an uncompressed 16-bit stereo PCM:
+# ffmpeg -i $audiofile -f s16be test.raw
+#######
+# plug in your NetMD using USB and use this script accordingly (title is optional):
+# sudo python downloadhack.py --filename ~/music/test.raw --title songtitle
+
+from optparse import OptionParser
+parser = OptionParser()
+parser.add_option('-b', '--bus')
+parser.add_option('-d', '--device')
+parser.add_option('-f', '--filename')
+parser.add_option('-t', '--title')
+(options, args) = parser.parse_args()
+assert len(args) < 4
+filename=options.filename
+if options.title != None:
+    title=options.title
+else:
+    title="no title"
+
 def main(bus=None, device_address=None):
     context = usb1.LibUSBContext()
     for md in libnetmd.iterdevices(context, bus=bus,
@@ -22,17 +46,17 @@ class EKB1_10:
         return (["\x25\x45\x06\x4d\xea\xca\x14\xf9\x96\xbd\xc8\xa4\x06\xc2\x2b\x81"], 9, \
                 "\x68\x86\x90\x89\xb7\x24\x18\x1e\xe8\x60\x04\x1d\x2e\xb3\xfd\xdb\xe7\x4c\x7c\xcd\xb1\xe3\x06\xc0")
 
-testframes=4644
+framecount=int(os.path.getsize(filename)/2048)
 
 class MDTrack:
     def getTitle(self):
-        return "HACK"
+        return title
 
     def getFramecount(self):
-        return testframes
+        return framecount
 
     def getDataFormat(self):
-        return libnetmd.WIREFORMAT_LP2
+        return libnetmd.WIREFORMAT_PCM
 
     def getContentID(self):
         # value probably doesn't matter
@@ -52,10 +76,9 @@ class MDTrack:
         keycrypter = DES.new(self.getKEK(), DES.MODE_ECB)
         key = keycrypter.encrypt(datakey)
         datacrypter = DES.new(key, DES.MODE_CBC, firstiv)
-        # to be obtained from http://users.physik.fu-berlin.de/~mkarcher/ATRAC/LP2.wav
-        file = open("/tmp/LP2.wav")
+        file = open(filename)
         file.read(60)
-        data = file.read(testframes*192)
+        data = file.read(framecount*2048)
         return [(datakey,firstiv,datacrypter.encrypt(data))]
 
 def DownloadHack(md_iface):
@@ -79,11 +102,5 @@ def DownloadHack(md_iface):
     md_session.close()
 
 if __name__ == '__main__':
-    from optparse import OptionParser
-    parser = OptionParser()
-    parser.add_option('-b', '--bus')
-    parser.add_option('-d', '--device')
-    (options, args) = parser.parse_args()
-    assert len(args) < 2
     main(bus=options.bus, device_address=options.device)
 
-- 
1.7.0.4