remove unnecessary copying and some conditional branches.

X and Y.

to assume denominator is positive.

some calls to ec_enc_uint() by calls to ec_enc_bits() (saves divisions)

a use for that anymore now that the overlap can be less than one frame.

the more complex "n-best search" and replaced it with a greedy search

require a branch.

optimisations.

required) and using it in ec_{en|de}c_bits()

(and fix for celt_div with 16-bit numerator on a 16-bit CPU)

the TI dsplib FFT.

of 32-bit in find_spectral_pitch()

to prevent surprises. Also, a few comments.