Hi,
I'm trying to write a FLAC decoder for my Java audio app. Can I ask a couple of
questions to this list about the format? I think there are a couple of things
not-quite-mentioned in the official spec.
RICE CODING: Which order are Rice-coded numbers stored in? (a) [sign-bit][low-order
bits]["k" zeroes][1]
(b) [sign-bit]["k" zeroes][1][low-order bits]
(c) [sign-bit][low-order bits]["k" ones][0]
(d) [sign-bit]["k" ones][0][low-order bits]
(e) ...?
(And I am I correct in saying the sign bit is 1 for positive, 0 for negative?)
WASTED BITS PER SAMPLE: What does this mean? I can't find a reference to what my
decoder should do with the wasted-bits-per-sample flag.
FRAME BLOCKSIZE: If a frame's BLOCKSIZE is specified as 0000 ("get from STREAMINFO"),
should I use the STREAMINFO "maximum blocksize" or "minimum blocksize"? Should the two
always be equal in this case, and should I throw an exception if they aren't?
RICE PARTITION SIZE: In a zero-partition-order Rice block, the documentation says the
number of samples in the partition is equal to the frame's blocksize. Surely this
should be equal to the frame's-blocksize-minus-the-predictor-order, since we shouldn't
need to encode residual for the warmup samples?
Thanks in advance!
Dan Stowell
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