void WebRtcIlbcfix_LpcEncode(
int16_t *syntdenum, /* (i/o) synthesis filter coefficients
before/after encoding */
int16_t *weightdenum, /* (i/o) weighting denumerator coefficients
before/after encoding */
int16_t *lsf_index, /* (o) lsf quantization index */
int16_t *data, /* (i) Speech to do LPC analysis on */
int16_t *lpcBuffer, /* (i/o) the encoder state structure */
int16_t* lsfOld,
int16_t* lsfDeqOld
) {
/* Stack based */
int16_t lsf[LPC_FILTERORDER * LPC_N_MAX];
int16_t lsfdeq[LPC_FILTERORDER * LPC_N_MAX];
/* Calculate LSF's from the input speech */
WebRtcIlbcfix_SimpleLpcAnalysis(lsf, data, lpcBuffer);
/* Quantize the LSF's */
WebRtcIlbcfix_SimpleLsfQ(lsfdeq, lsf_index, lsf, 1);
/* Stableize the LSF's if needed */
WebRtcIlbcfix_LsfCheck(lsfdeq, LPC_FILTERORDER, 1);
/* Calculate the synthesis and weighting filter coefficients from
the optimal LSF and the dequantized LSF */
WebRtcIlbcfix_SimpleInterpolateLsf(syntdenum, weightdenum,
lsf, lsfdeq, lsfOld,
lsfDeqOld, LPC_FILTERORDER);
return;
}
void WebRtcIlbcfix_LpcEncode(
WebRtc_Word16 *syntdenum, /* (i/o) synthesis filter coefficients
before/after encoding */
WebRtc_Word16 *weightdenum, /* (i/o) weighting denumerator coefficients
before/after encoding */
WebRtc_Word16 *lsf_index, /* (o) lsf quantization index */
WebRtc_Word16 *data, /* (i) Speech to do LPC analysis on */
iLBC_Enc_Inst_t *iLBCenc_inst
/* (i/o) the encoder state structure */
) {
/* Stack based */
WebRtc_Word16 lsf[LPC_FILTERORDER * LPC_N_MAX];
WebRtc_Word16 lsfdeq[LPC_FILTERORDER * LPC_N_MAX];
/* Calculate LSF's from the input speech */
WebRtcIlbcfix_SimpleLpcAnalysis(lsf, data, iLBCenc_inst);
/* Quantize the LSF's */
WebRtcIlbcfix_SimpleLsfQ(lsfdeq, lsf_index, lsf, iLBCenc_inst->lpc_n);
/* Stableize the LSF's if needed */
WebRtcIlbcfix_LsfCheck(lsfdeq, LPC_FILTERORDER, iLBCenc_inst->lpc_n);
/* Calculate the synthesis and weighting filter coefficients from
the optimal LSF and the dequantized LSF */
WebRtcIlbcfix_SimpleInterpolateLsf(syntdenum, weightdenum,
lsf, lsfdeq, iLBCenc_inst->lsfold,
iLBCenc_inst->lsfdeqold, LPC_FILTERORDER, iLBCenc_inst);
return;
}