libgsmhr1 RxFE: store CN R0+LPC separately from speech In the original GSM 06.06 code the ECU for speech mode is entirely separate from the CN generator, maintaining separate state. (The main intertie between them is the speech vs CN state variable, distinguishing between speech and CN BFIs, in addition to the CN-specific function of distinguishing between initial and update SIDs.) In the present RxFE implementation I initially thought that we could use the same saved_frame buffer for both ECU and CN, overwriting just the first 4 params (R0 and LPC) when a valid SID comes in. However, I now realize it was a bad idea: the original code has a corner case (long sequence of speech-mode BFIs to put the ECU in state 6, then SID and CN-mode BFIs, then a good speech frame) that would be broken by that buffer reuse approach. We could eliminate this corner case by resetting the ECU state when passing through a CN insertion period, but doing so would needlessly increase the behavioral diffs between GSM 06.06 and our version. Solution: use a separate CN-specific buffer for CN R0+LPC parameters, and match the behavior of GSM 06.06 code in this regard.

# This file is the source input for automatic generation of namespace.h
# for libgsmhr1.  Each word in every non-empty, non-comment line lists a
# function or a data object with intermodule linkage whose name needs to be
# transformed in order to avoid namespace pollution for users of our library.

add sub L_add L_sub
mult L_mult mult_r
shr shl L_shr L_shl shift_r L_shift_r
abs_s L_abs
L_mac mac_r L_msu msu_r
negate L_negate
L_deposit_l L_deposit_h extract_l extract_h
round norm_l norm_s divide_s
L_mpy_ls L_mpy_ll isSwLimit isLwLimit

fillBitAlloc

pppsrGsp0 pppsrUvCodeVec pppsrVcdCodeVec
psrQuant1 psrQuant2 psrQuant3 psrPreQ1 psrPreQ2 psrPreQ3
psrQuantSz psrPreQSz psrSQuant psvqIndex ppsrSqrtP0
ppsrCGIntFilt ppsrPVecIntFilt psrLagTbl psrR0DecTbl
psrHPFCoefs psrNWCoefs pL_rFlatSstCoefs psrOldCont psrNewCont

ppLr_gsTable avgGsHistQntz gsQuant getPnBits
rxfe_main