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; }