[Flac-dev] A couple of points about flac 1.1.1 on ppc/linux/altivec

Josh Coalson xflac at yahoo.com
Thu Jan 20 17:20:47 PST 2005

--- John Steele Scott <toojays at toojays.net> wrote:
> Back in October 2004, I did a bit of work on FLAC to get version
> 1.1.1 to
> build correctly under GNU/Linux/PPC. Only now have I realised that
> somewhere
> along the way something broke in FLAC's decoding. On my machine,
> roughly 50%
> of FLAC files are being decoded incorrectly.
> I presume that I broke the code somehow when translating Josh's
> original OS X
> assembler into GNU style.

are you the one who submitted the patch with a translated
version of lpc_asm.s?  I thought that was Luca.

> Is there any kind of test harness or test routine which I could use
> to track
> down exactly where the problem lies?

no, that's one of the hardest things to debug.  you pretty much
have to single-step through it and making sense of it requires
intimate knowledge of the decoder.  that's why it takes me so
long to qualify any patches to the core encoder/decoder.  there
is little forgiveness from users for bugs in those.


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