?? decg729fp.c
字號:
DecodeAdaptCodebookDelays(&decoderObj->prevPitchDelay,&decoderObj->prevFracPitchDelay,delayLine,NSbfr,badPitch,index,rate);
PitchDelay = delayLine[0];
T2[nsubfr] = PitchDelay;
/* adaptive codebook decode */
ippsDecodeAdaptiveVector_G729_32f_I(delayLine, &Excitation[NSbfr]);
if(decoderObj->objPrm.codecType!=G729A_CODEC) {
/* Pitch tracking*/
if( rate == G729E_MODE) {
PitchTracking_G729FPE(&decoderObj->prevPitchDelay, &decoderObj->prevFracPitchDelay, &decoderObj->lPrevPitchPT, &decoderObj->lStatPitchPT,
&decoderObj->lStatPitch2PT, &decoderObj->lStatFracPT);
} else {
i = decoderObj->prevPitchDelay;
j = decoderObj->prevFracPitchDelay;
PitchTracking_G729FPE(&i, &j, &decoderObj->lPrevPitchPT, &decoderObj->lStatPitchPT,
&decoderObj->lStatPitch2PT, &decoderObj->lStatFracPT);
}
}
/* Fixed codebook decode*/
ippsZero_32f(ACELPCodeVec,SUBFR_LEN);
if (rate == G729_BASE) {
/* case base mode or annex A*/
LOCAL_ARRAY(int, Position, 4, decoderObj);
int index, sign;
if(bfi != 0) /* Bad frame */
{
index = (int)Rand_16s(&decoderObj->sFESeed) & (short)0x1fff; /* 13 bits random */
sign = (int)Rand_16s(&decoderObj->sFESeed) & (short)0x000f; /* 4 bits random */
}else{
index = pDecPrm[0];
sign = pDecPrm[1];
}
/* First pulse's positions*/
Position[0] = (index&7)*5;
/* Second pulse's positions*/
index >>= 3;
Position[1] = (index&7)*5 + 1;
/* Third pulse's positions*/
index >>= 3;
Position[2] = (index&7)*5 + 2;
/* Forth pulse's positions*/
index >>= 3;
j = index;
index >>= 1;
Position[3] = (index&7)*5 + 3 + (j&1);
/* Decode signs of 4 pulse and compose the algebraic codeword */
for (j=0; j<4; j++) {
if (((sign>>j) & 1) != 0) {
ACELPCodeVec[Position[j]] = 1.0;
} else {
ACELPCodeVec[Position[j]] = -1.0;
}
}
pDecPrm += 2;
/* for gain decoding in case of frame erasure */
decoderObj->sBWDStatInd = 0;
highStatIndicator = 0;
LOCAL_ARRAY_FREE(int, Position, 4, decoderObj);
} else if (rate == G729D_MODE) {
/* case annex D*/
LOCAL_ARRAY(int, Position, 2, decoderObj);
int index, sign;
if(bfi != 0) /* Bad frame */
{
index = (int)Rand_16s(&decoderObj->sFESeed) & (short)0x1fff; /* 13 bits random */
sign = (int)Rand_16s(&decoderObj->sFESeed) & (short)0x000f; /* 4 bits random */
}else{
index = pDecPrm[0];
sign = pDecPrm[1];
}
/* decode the positions of 4 pulses */
i = index & 15;
Position[0] = trackTbl0[i];
index >>= 4;
i = index & 31;
Position[1] = trackTbl1[i];
/* find the algebraic codeword */
/* decode the signs of 2 pulses */
for (j=0; j<2; j++) {
if (((sign>>j) & 1) != 0) {
ACELPCodeVec[Position[j]] += 1.0;
} else {
ACELPCodeVec[Position[j]] -= 1.0;
}
}
pDecPrm += 2;
/* for gain decoding in case of frame erasure */
decoderObj->sBWDStatInd = 0;
highStatIndicator = 0;
LOCAL_ARRAY_FREE(int, Position, 2, decoderObj);
} else if (rate == G729E_MODE) {
/* case annex E*/
LOCAL_ARRAY(int, tmp_parm, 5, decoderObj);
if(bfi)
{
tmp_parm[0] = (int)Rand_16s(&decoderObj->sFESeed);
tmp_parm[1] = (int)Rand_16s(&decoderObj->sFESeed);
tmp_parm[2] = (int)Rand_16s(&decoderObj->sFESeed);
tmp_parm[3] = (int)Rand_16s(&decoderObj->sFESeed);
tmp_parm[4] = (int)Rand_16s(&decoderObj->sFESeed);
}else{
for(i=0;i<5;i++)
tmp_parm[i] = pDecPrm[i];
}
if (LPCMode == 0) {
int pos1, pos2;
float sign;
/* decode the positions and signs of pulses and build the codeword */
pos1 = ((tmp_parm[0] & 7) * 5);
if (((tmp_parm[0]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[0]>>4) & 7) * 5);
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
pos1 = ((tmp_parm[1] & 7) * 5) + 1;
if (((tmp_parm[1]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[1]>>4) & 7) * 5) + 1;
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
pos1 = ((tmp_parm[2] & 7) * 5) + 2;
if (((tmp_parm[2]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[2]>>4) & 7) * 5) + 2;
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
pos1 = ((tmp_parm[3] & 7) * 5) + 3;
if (((tmp_parm[3]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[3]>>4) & 7) * 5) + 3;
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
pos1 = ((tmp_parm[4] & 7) * 5) + 4;
if (((tmp_parm[4]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[4]>>4) & 7) * 5) + 4;
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
/* for gain decoding in case of frame erasure */
decoderObj->sBWDStatInd = 0;
highStatIndicator = 0;
} else {
int j, track, pos1, pos2, pos3;
float sign;
/* decode the positions and signs of pulses and build the codeword */
track = (tmp_parm[0]>>10) & 7;
CLIP_TO_UPLEVEL(track,NUM_TRACK_ACELP);
for (j=0; j<2; j++) {
pos1 = ((tmp_parm[j] & 7) * 5) + track;
if (((tmp_parm[j]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[j]>>4) & 7) * 5) + track;
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
pos3 = (((tmp_parm[j]>>7) & 7) * 5) + track;
if (pos3 > pos2) sign = -sign;
ACELPCodeVec[pos3] += sign;
track++;
if (track > NUM_TRACK_ACELP) track = 0;
}
for (j=2; j<5; j++) {
pos1 = ((tmp_parm[j] & 7) * 5) + track;
if (((tmp_parm[j]>>3) & 1) == 0) sign = 1.;
else sign = -1.;
ACELPCodeVec[pos1] = sign;
pos2 = (((tmp_parm[j]>>4) & 7) * 5) + track;
if (pos2 > pos1) sign = -sign;
ACELPCodeVec[pos2] += sign;
track++;
if (track > NUM_TRACK_ACELP) track = 0;
}
/* for gain decoding in case of frame erasure */
decoderObj->sBWDStatInd++;
if (decoderObj->sBWDStatInd >= 30) {
highStatIndicator = 1;
decoderObj->sBWDStatInd = 30;
} else highStatIndicator = 0;
}
pDecPrm += 5;
LOCAL_ARRAY_FREE(int, tmp_parm, 5, decoderObj);
}
ippsHarmonicFilter_32f_I(decoderObj->fBetaPreFilter,PitchDelay,&ACELPCodeVec[PitchDelay],SUBFR_LEN-PitchDelay);
/* Decode pitch and codebook gains. */
index = *pDecPrm++; /* index of energy VQ */
if (bfi != 0) {
float av_pred_en;
if(rate == G729E_MODE) {
if (decoderObj->lBFICounter < 2) {
if (highStatIndicator) decoderObj->fPitchGain = 1.;
else decoderObj->fPitchGain = 0.95f;
decoderObj->fCodeGain = decoderObj->fCodeGainMemory;
} else {
decoderObj->fPitchGain = decoderObj->fPitchGainMemory * (decoderObj->fGainMuting);
decoderObj->fCodeGain = decoderObj->fCodeGainMemory * (decoderObj->fGainMuting);
if (highStatIndicator) {
if (decoderObj->lBFICounter > 10) decoderObj->fGainMuting *= 0.995f;
} else decoderObj->fGainMuting *= 0.98f;
}
} else {
decoderObj->fPitchGain *= 0.9f;
if(decoderObj->fPitchGain > 0.9f) decoderObj->fPitchGain=0.9f;
decoderObj->fCodeGain *= 0.98f;
}
/* Update table of past quantized energies */
av_pred_en = 0.0f;
for (i = 0; i < 4; i++)
av_pred_en += decoderObj->PastQuantEnergy[i];
av_pred_en = av_pred_en*0.25f - 4.0f;
if (av_pred_en < -14.0) av_pred_en = -14.0f;
for (i = 3; i > 0; i--)
decoderObj->PastQuantEnergy[i] = decoderObj->PastQuantEnergy[i-1];
decoderObj->PastQuantEnergy[0] = av_pred_en;
} else {
DecodeGain_G729(index, ACELPCodeVec, SUBFR_LEN, &decoderObj->fPitchGain, &decoderObj->fCodeGain, rate, decoderObj->PastQuantEnergy);
}
/* Update previous gains */
decoderObj->fPitchGainMemory = decoderObj->fPitchGain;
decoderObj->fCodeGainMemory = decoderObj->fCodeGain;
/* - Update pitch sharpening "fBetaPreFilter" with quantized fPitchGain */
decoderObj->fBetaPreFilter = decoderObj->fPitchGain;
CLIP_TO_UPLEVEL(decoderObj->fBetaPreFilter,PITCH_SHARPMAX);
CLIP_TO_LOWLEVEL(decoderObj->fBetaPreFilter,PITCH_SHARPMIN);
/* Synthesis of speech corresponding to Excitation[] */
if(decoderObj->objPrm.codecType!=G729A_CODEC) {
if(bfi != 0) { /* Bad frame */
decoderObj->lBFICounter++;
if (decoderObj->lVoicing == 0 ) {
PitchGain = 0.;
CodeGain = decoderObj->fCodeGain;
} else {
PitchGain = decoderObj->fPitchGain;
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