[vorbis-dev] Trouble decoding number of codebooks

[Ralph Giles]

On Saturday, June 14, 2003, at 12:36 am, <ots1 at cs.waikato.ac.nz> wrote:

> I read in the sync pattern, and I think the codebook dimensions 
> properly,
> but when I try and read in the number of codebook entries, I get a 
> number
> larger than the number of bytes in the file, which I have to assume is
> wrong :)

The code you've written isn't at all portable, but assuming you're 
trying to convert from vorbis little-endian to native integers on a 
big-endian host, your problem is convertArray2().

Assuming 'readBytes()' reads in a byte at a time, you start with 
entries = byte0,byte1,byte2,unknown,.... convertArray2 swaps this to 
byte2,byte1,byte0,unknown, and then casts to a long. The actual value 
is 0,byte2,byte1,byte0, so your result is multiplied by 256 + a random 
value. The dimensions read is wrong too.

Hope that helps,
  -r

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