hymn

MossPile · Joined: 19 Nov 2007 Posts: 16777215

Update: v2.0 is linked and described later on in the thread.

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With some help from a friend who would prefer to remain anonymous for the time being, I have a full M4P decoder for OS X called "ffh" (Flaky Fairplay Hack). It'll losslessly (and quickly) decrypt music files to M4A.

Quick notes:

Requires OS X. Probably Leopard-only, although I haven't done testing with Tiger.
Source-only distribution - developer tools must be installed.
Metadata is currently not preserved

Extended release notes are included in the archive.

It's currently hosted at Rapidshare (link below). Hopefully the Hymn folks can rehost it locally.

Links removed. -iTIE

TunesRus90 · Joined: 08 Jul 2007 Posts: 27

Damn, I just installed Leopard, but I didn't install the developer tools yet. I'll have to get those installed. Thanks though. Looking forward to testing this app, and I'll probably try to work out some sort of applescript to transfer metadata and update playlists with the unprotected files.

Annath · Joined: 22 Jul 2006 Posts: 325

Woo! Does it use basically the same concept as QTFU?
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TunesRus90 · Joined: 08 Jul 2007 Posts: 27

Well I just tested, and it said:
44503262.50% - wrote -3560261 bytes too much data somehow?! Oops.
But the resulting file seems to play okay.

MossPile · Joined: 19 Nov 2007 Posts: 16777215

iTunesIsEvil · Posted: Wed Jan 02, 2008 2:32 pm Post subject:

When I get home tonight I'll attempt to compile and test this and see if we can't get a binary up by the end of the evening.
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slycrel · Joined: 02 Jan 2008 Posts: 6

Hi there.

Using my own authorized files on an authorized machine I get the following error:

Trap initialization error: machErr #f8000001

I added "-arch_only ppc" to LDFLAGS in the makefile as well with no change. (I'm running this on an x86 machine) This may not be the right place for the arch flag though. I'm rusty using makefiles.

Running under Leopard 10.5.1, build 9B18.

I'll also try to throw together an xcode project and see if I can get it to work. Interesting idea.

edit:

After doing some poking around, I figured out what the trap error is. Unfortunately I don't really know how to fix it on the x86 machine, I am assuming that the mach_override code needs to change for that.

Additionally, I changed it to PPC and unfortunately I'm not cool enough to know how to properly link in the libmp4v2.a library so that it's happy in xcode. And I'm not willing to spend the time right now to get that building itself in xcode. So it won't link properly. Too bad, debugging would be helpful to speed this process up a bit. =)

I did build and run this on a G5 PPC tower and got a separate error. It looks like it started, but I got this:

"0.00% - uh-oh, 3618476 bytes seem to have gotten lost"

Trying to even preview the m4a file to play it without itunes crashes the finder. Which makes sense since the resulting file is 4k, probably empty or some header garbage, but obviously an incomplete file.

I've got to move on for now, but I'll be keeping tabs on this, and may work on this some later. Thanks for the work you do -- hopefully it works better for others than for me.

MossPile · Joined: 19 Nov 2007 Posts: 16777215

I've been looking at the x86 issues with a friend, and I have a pretty good idea of what the problem is. (memcpy is kind of weird on Leopard x86.) I don't have a solution quite yet, but at least I know what the problem is.

I don't know what's going on with your G5, though. Just as a sanity check, are you authorized to play the file in question on that machine? (If not, open it up in iTunes and authorize yourself first.) Failing that, try changing the usleep(10000) on line 155 to usleep(20000). If that still doesn't work, I'm kind of at a loss.

Incidentally, linking in libmp4v2.a is probably easier than you expect. Just build that file externally, then drag it into the project. Smile

TunesRus90 · Joined: 08 Jul 2007 Posts: 27

Okay, well I've done a few more tests, and so far unable to replicate the original error. Also, I am on PowerPC, so it wasn't an x86 problem, but whatever, as long as it doesn't happen anymore I'm fine with that.

About the applescript thing, don't get me wrong, it would be great to have FFH preserve meta data (although, for security reasons, it might be a good idea to leave all of the purchased info excluded from the new file), but I already have most of the code needed to update the data by applescript. I just combined a few snipets from scripts that I already had, updated some of my older code, and I now have a script that runs your app on the selected song in iTunes, adds the newly decrypted song back to iTunes, transfers all id3 info, and changes all references to the protected song in playlists to the new, unprotected song. However, it still can't handle multiple files at once. I can have a fully working version up within a few days, if there is interest, but if you plan on updating this app soon to preserve meta data I'll just wait to post anything.

Once again, thanks for all of your work MossPile, and thanks also to the anonymous code-submitter. It really is great to finally have a lossless mac solution.

slycrel · Joined: 02 Jan 2008 Posts: 6

slycrel · Joined: 02 Jan 2008 Posts: 6

Okay, it was an authorization issue on my G5. My bad. It works fine there.

This evening I may take a crack at adding support for multiple file conversions. I have ulterior motives, I'm getting a new mp3 player in the mail tomorrow and this would be nice to have for that. =)

DrmBytes · Moderator Joined: 16 May 2004 Posts: 2999

Post has been stickied and will be added to the FAQ for Mac solutions later. Also, when the kinks are worked out we'll host it on the site and give it an info thread in the Start Here forum.
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iTunesIsEvil · Posted: Thu Jan 03, 2008 6:50 pm Post subject:

DrmBytes · Moderator Joined: 16 May 2004 Posts: 2999

Work has been killing me this week. I did manage to add something to the FAQ about this thread so curious people will find it. We'll get it hosted soon.
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colivigan · Joined: 26 Oct 2005 Posts: 290

How fast is it? The original post says "quickly". Is it as fast as QTFairUse/MyFairTunes?

Thanks, MossPile and friend for the hard work. This is awesome!

Great idea using the Quicktime APIs instead of hooking iTunes itself - it's so much cleaner this way.