public sealed override int Quant(float[] target, float[] sw, int sws, float[] ak, float[] awk1, float[] awk2, float[] exc, int es, int start, int end, float pitch_coef, int p, int nsf, Bits bits, float[] exc2, int e2s, float[] r, int complexity)
{
int[] array = new int[1];
int num = 0;
int data = 0;
int num2 = 0;
float num3 = -1f;
int num4 = complexity;
if (num4 > 10)
{
num4 = 10;
}
int[] array2 = new int[num4];
float[] array3 = new float[num4];
if (num4 == 0 || end < start)
{
bits.Pack(0, this.pitch_bits);
bits.Pack(0, this.gain_bits);
for (int i = 0; i < nsf; i++)
{
exc[es + i] = 0f;
}
return(start);
}
float[] array4 = new float[nsf];
if (num4 > end - start + 1)
{
num4 = end - start + 1;
}
Ltp.Open_loop_nbest_pitch(sw, sws, start, end, nsf, array2, array3, num4);
for (int i = 0; i < num4; i++)
{
num = array2[i];
for (int j = 0; j < nsf; j++)
{
exc[es + j] = 0f;
}
float num5 = this.Pitch_gain_search_3tap(target, ak, awk1, awk2, exc, es, num, p, nsf, bits, exc2, e2s, r, array);
if (num5 < num3 || num3 < 0f)
{
for (int j = 0; j < nsf; j++)
{
array4[j] = exc[es + j];
}
num3 = num5;
num2 = num;
data = array[0];
}
}
bits.Pack(num2 - start, this.pitch_bits);
bits.Pack(data, this.gain_bits);
for (int i = 0; i < nsf; i++)
{
exc[es + i] = array4[i];
}
return(num);
}
public SubMode(int lbrPitch, int forcedPitchGain, int haveSubframeGain, int doubleCodebook, LspQuant lspQuant, Ltp ltp, CodebookSearch innovation, float lpcEnhK1, float lpcEnhK2, float combGain, int bitsPerFrame)
{
this.lbrPitch = lbrPitch;
this.forcedPitchGain = forcedPitchGain;
this.haveSubframeGain = haveSubframeGain;
this.doubleCodebook = doubleCodebook;
this.lsqQuant = lspQuant;
this.ltp = ltp;
this.innovation = innovation;
this.lpcEnhK1 = lpcEnhK1;
this.lpcEnhK2 = lpcEnhK2;
this.combGain = combGain;
this.bitsPerFrame = bitsPerFrame;
}
public virtual int Encode(Bits bits, float[] ins0)
{
Array.Copy(this.frmBuf, this.frameSize, this.frmBuf, 0, this.bufSize - this.frameSize);
this.frmBuf[this.bufSize - this.frameSize] = ins0[0] - this.preemph * this.pre_mem;
for (int i = 1; i < this.frameSize; i++)
{
this.frmBuf[this.bufSize - this.frameSize + i] = ins0[i] - this.preemph * ins0[i - 1];
}
this.pre_mem = ins0[this.frameSize - 1];
Array.Copy(this.exc2Buf, this.frameSize, this.exc2Buf, 0, this.bufSize - this.frameSize);
Array.Copy(this.excBuf, this.frameSize, this.excBuf, 0, this.bufSize - this.frameSize);
Array.Copy(this.swBuf, this.frameSize, this.swBuf, 0, this.bufSize - this.frameSize);
for (int i = 0; i < this.windowSize; i++)
{
this.buf2[i] = this.frmBuf[i + this.frmIdx] * this.window[i];
}
Lpc.Autocorr(this.buf2, this.autocorr, this.lpcSize + 1, this.windowSize);
this.autocorr[0] += 10f;
this.autocorr[0] *= this.lpc_floor;
for (int i = 0; i < this.lpcSize + 1; i++)
{
this.autocorr[i] *= this.lagWindow[i];
}
Lpc.Wld(this.lpc, this.autocorr, this.rc, this.lpcSize);
Array.Copy(this.lpc, 0, this.lpc, 1, this.lpcSize);
this.lpc[0] = 1f;
int num = Lsp.Lpc2lsp(this.lpc, this.lpcSize, this.lsp, 15, 0.2f);
if (num == this.lpcSize)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.lsp[i] = (float)Math.Acos((double)this.lsp[i]);
}
}
else
{
if (this.complexity > 1)
{
num = Lsp.Lpc2lsp(this.lpc, this.lpcSize, this.lsp, 11, 0.05f);
}
if (num == this.lpcSize)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.lsp[i] = (float)Math.Acos((double)this.lsp[i]);
}
}
else
{
for (int i = 0; i < this.lpcSize; i++)
{
this.lsp[i] = this.old_lsp[i];
}
}
}
float num2 = 0f;
for (int i = 0; i < this.lpcSize; i++)
{
num2 += (this.old_lsp[i] - this.lsp[i]) * (this.old_lsp[i] - this.lsp[i]);
}
if (this.first != 0)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_lsp[i] = this.lsp[i];
}
}
else
{
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_lsp[i] = 0.375f * this.old_lsp[i] + 0.625f * this.lsp[i];
}
}
Lsp.Enforce_margin(this.interp_lsp, this.lpcSize, 0.002f);
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_lsp[i] = (float)Math.Cos((double)this.interp_lsp[i]);
}
this.m_lsp.Lsp2lpc(this.interp_lsp, this.interp_lpc, this.lpcSize);
int num3;
float num4;
if (this.submodes[this.submodeID] == null || this.vbr_enabled != 0 || this.vad_enabled != 0 || this.submodes[this.submodeID].ForcedPitchGain != 0 || this.submodes[this.submodeID].LbrPitch != -1)
{
int[] array = new int[6];
float[] array2 = new float[6];
Filters.Bw_lpc(this.gamma1, this.interp_lpc, this.bw_lpc1, this.lpcSize);
Filters.Bw_lpc(this.gamma2, this.interp_lpc, this.bw_lpc2, this.lpcSize);
Filters.Filter_mem2(this.frmBuf, this.frmIdx, this.bw_lpc1, this.bw_lpc2, this.swBuf, this.swIdx, this.frameSize, this.lpcSize, this.mem_sw_whole, 0);
Ltp.Open_loop_nbest_pitch(this.swBuf, this.swIdx, this.min_pitch, this.max_pitch, this.frameSize, array, array2, 6);
num3 = array[0];
num4 = array2[0];
for (int i = 1; i < 6; i++)
{
if ((double)array2[i] > 0.85 * (double)num4 && (Math.Abs((double)array[i] - (double)num3 / 2.0) <= 1.0 || Math.Abs((double)array[i] - (double)num3 / 3.0) <= 1.0 || Math.Abs((double)array[i] - (double)num3 / 4.0) <= 1.0 || Math.Abs((double)array[i] - (double)num3 / 5.0) <= 1.0))
{
num3 = array[i];
}
}
}
else
{
num3 = 0;
num4 = 0f;
}
Filters.Fir_mem2(this.frmBuf, this.frmIdx, this.interp_lpc, this.excBuf, this.excIdx, this.frameSize, this.lpcSize, this.mem_exc);
float num5 = 0f;
for (int i = 0; i < this.frameSize; i++)
{
num5 += this.excBuf[this.excIdx + i] * this.excBuf[this.excIdx + i];
}
num5 = (float)Math.Sqrt((double)(1f + num5 / (float)this.frameSize));
if (this.vbr != null && (this.vbr_enabled != 0 || this.vad_enabled != 0))
{
if (this.abr_enabled != 0)
{
float num6 = 0f;
if (this.abr_drift2 * this.abr_drift > 0f)
{
num6 = -1E-05f * this.abr_drift / (1f + this.abr_count);
if (num6 > 0.05f)
{
num6 = 0.05f;
}
if (num6 < -0.05f)
{
num6 = -0.05f;
}
}
this.vbr_quality += num6;
if (this.vbr_quality > 10f)
{
this.vbr_quality = 10f;
}
if (this.vbr_quality < 0f)
{
this.vbr_quality = 0f;
}
}
this.relative_quality = this.vbr.Analysis(ins0, this.frameSize, num3, num4);
if (this.vbr_enabled != 0)
{
int num7 = 0;
float num8 = 100f;
int j;
for (j = 8; j > 0; j--)
{
int num9 = (int)Math.Floor((double)this.vbr_quality);
float num10;
if (num9 == 10)
{
num10 = NSpeex.Vbr.nb_thresh[j][num9];
}
else
{
num10 = (this.vbr_quality - (float)num9) * NSpeex.Vbr.nb_thresh[j][num9 + 1] + ((float)(1 + num9) - this.vbr_quality) * NSpeex.Vbr.nb_thresh[j][num9];
}
if (this.relative_quality > num10 && this.relative_quality - num10 < num8)
{
num7 = j;
num8 = this.relative_quality - num10;
}
}
j = num7;
if (j == 0)
{
if (this.dtx_count == 0 || (double)num2 > 0.05 || this.dtx_enabled == 0 || this.dtx_count > 20)
{
j = 1;
this.dtx_count = 1;
}
else
{
j = 0;
this.dtx_count++;
}
}
else
{
this.dtx_count = 0;
}
this.Mode = j;
if (this.abr_enabled != 0)
{
int bitRate = this.BitRate;
this.abr_drift += (float)(bitRate - this.abr_enabled);
this.abr_drift2 = 0.95f * this.abr_drift2 + 0.05f * (float)(bitRate - this.abr_enabled);
this.abr_count += new float?(1f).Value;
}
}
else
{
int submodeID;
if (this.relative_quality < 2f)
{
if (this.dtx_count == 0 || (double)num2 > 0.05 || this.dtx_enabled == 0 || this.dtx_count > 20)
{
this.dtx_count = 1;
submodeID = 1;
}
else
{
submodeID = 0;
this.dtx_count++;
}
}
else
{
this.dtx_count = 0;
submodeID = this.submodeSelect;
}
this.submodeID = submodeID;
}
}
else
{
this.relative_quality = -1f;
}
bits.Pack(0, 1);
bits.Pack(this.submodeID, 4);
if (this.submodes[this.submodeID] == null)
{
for (int i = 0; i < this.frameSize; i++)
{
this.excBuf[this.excIdx + i] = (this.exc2Buf[this.exc2Idx + i] = (this.swBuf[this.swIdx + i] = 0f));
}
for (int i = 0; i < this.lpcSize; i++)
{
this.mem_sw[i] = 0f;
}
this.first = 1;
this.bounded_pitch = 1;
Filters.Iir_mem2(this.excBuf, this.excIdx, this.interp_qlpc, this.frmBuf, this.frmIdx, this.frameSize, this.lpcSize, this.mem_sp);
ins0[0] = this.frmBuf[this.frmIdx] + this.preemph * this.pre_mem2;
for (int i = 1; i < this.frameSize; i++)
{
ins0[i] = this.frmBuf[this.frmIdx = i] + this.preemph * ins0[i - 1];
}
this.pre_mem2 = ins0[this.frameSize - 1];
return(0);
}
if (this.first != 0)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.old_lsp[i] = this.lsp[i];
}
}
this.submodes[this.submodeID].LsqQuant.Quant(this.lsp, this.qlsp, this.lpcSize, bits);
if (this.submodes[this.submodeID].LbrPitch != -1)
{
bits.Pack(num3 - this.min_pitch, 7);
}
if (this.submodes[this.submodeID].ForcedPitchGain != 0)
{
int num11 = (int)Math.Floor(0.5 + (double)(15f * num4));
if (num11 > 15)
{
num11 = 15;
}
if (num11 < 0)
{
num11 = 0;
}
bits.Pack(num11, 4);
num4 = 0.066667f * (float)num11;
}
int num12 = (int)Math.Floor(0.5 + 3.5 * Math.Log((double)num5));
if (num12 < 0)
{
num12 = 0;
}
if (num12 > 31)
{
num12 = 31;
}
num5 = (float)Math.Exp((double)num12 / 3.5);
bits.Pack(num12, 5);
if (this.first != 0)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.old_qlsp[i] = this.qlsp[i];
}
}
float[] array3 = new float[this.subframeSize];
float[] array4 = new float[this.subframeSize];
float[] array5 = new float[this.subframeSize];
float[] array6 = new float[this.lpcSize];
float[] array7 = new float[this.frameSize];
for (int i = 0; i < this.frameSize; i++)
{
array7[i] = this.frmBuf[this.frmIdx + i];
}
for (int k = 0; k < this.nbSubframes; k++)
{
int num13 = this.subframeSize * k;
int num14 = this.frmIdx + num13;
int num15 = this.excIdx + num13;
int num16 = this.swIdx + num13;
int num17 = this.exc2Idx + num13;
float num18 = (float)(1.0 + (double)k) / (float)this.nbSubframes;
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_lsp[i] = (1f - num18) * this.old_lsp[i] + num18 * this.lsp[i];
}
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_qlsp[i] = (1f - num18) * this.old_qlsp[i] + num18 * this.qlsp[i];
}
Lsp.Enforce_margin(this.interp_lsp, this.lpcSize, 0.002f);
Lsp.Enforce_margin(this.interp_qlsp, this.lpcSize, 0.002f);
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_lsp[i] = (float)Math.Cos((double)this.interp_lsp[i]);
}
this.m_lsp.Lsp2lpc(this.interp_lsp, this.interp_lpc, this.lpcSize);
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_qlsp[i] = (float)Math.Cos((double)this.interp_qlsp[i]);
}
this.m_lsp.Lsp2lpc(this.interp_qlsp, this.interp_qlpc, this.lpcSize);
num18 = 1f;
this.pi_gain[k] = 0f;
for (int i = 0; i <= this.lpcSize; i++)
{
this.pi_gain[k] += num18 * this.interp_qlpc[i];
num18 = -num18;
}
Filters.Bw_lpc(this.gamma1, this.interp_lpc, this.bw_lpc1, this.lpcSize);
if (this.gamma2 >= 0f)
{
Filters.Bw_lpc(this.gamma2, this.interp_lpc, this.bw_lpc2, this.lpcSize);
}
else
{
this.bw_lpc2[0] = 1f;
this.bw_lpc2[1] = -this.preemph;
for (int i = 2; i <= this.lpcSize; i++)
{
this.bw_lpc2[i] = 0f;
}
}
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] = 0f;
}
this.excBuf[num15] = 1f;
Filters.Syn_percep_zero(this.excBuf, num15, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, array5, this.subframeSize, this.lpcSize);
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] = 0f;
}
for (int i = 0; i < this.subframeSize; i++)
{
this.exc2Buf[num17 + i] = 0f;
}
for (int i = 0; i < this.lpcSize; i++)
{
array6[i] = this.mem_sp[i];
}
Filters.Iir_mem2(this.excBuf, num15, this.interp_qlpc, this.excBuf, num15, this.subframeSize, this.lpcSize, array6);
for (int i = 0; i < this.lpcSize; i++)
{
array6[i] = this.mem_sw[i];
}
Filters.Filter_mem2(this.excBuf, num15, this.bw_lpc1, this.bw_lpc2, array3, 0, this.subframeSize, this.lpcSize, array6, 0);
for (int i = 0; i < this.lpcSize; i++)
{
array6[i] = this.mem_sw[i];
}
Filters.Filter_mem2(this.frmBuf, num14, this.bw_lpc1, this.bw_lpc2, this.swBuf, num16, this.subframeSize, this.lpcSize, array6, 0);
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] = this.swBuf[num16 + i] - array3[i];
}
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] = (this.exc2Buf[num17 + i] = 0f);
}
int start;
int num19;
if (this.submodes[this.submodeID].LbrPitch != -1)
{
int lbrPitch = this.submodes[this.submodeID].LbrPitch;
if (lbrPitch != 0)
{
if (num3 < this.min_pitch + lbrPitch - 1)
{
num3 = this.min_pitch + lbrPitch - 1;
}
if (num3 > this.max_pitch - lbrPitch)
{
num3 = this.max_pitch - lbrPitch;
}
start = num3 - lbrPitch + 1;
num19 = num3 + lbrPitch;
}
else
{
num19 = (start = num3);
}
}
else
{
start = this.min_pitch;
num19 = this.max_pitch;
}
if (this.bounded_pitch != 0 && num19 > num13)
{
num19 = num13;
}
int num20 = this.submodes[this.submodeID].Ltp.Quant(array4, this.swBuf, num16, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, this.excBuf, num15, start, num19, num4, this.lpcSize, this.subframeSize, bits, this.exc2Buf, num17, array5, this.complexity);
this.pitch[k] = num20;
Filters.Syn_percep_zero(this.excBuf, num15, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, array3, this.subframeSize, this.lpcSize);
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] -= array3[i];
}
float num21 = 0f;
int num22 = k * this.subframeSize;
for (int i = 0; i < this.subframeSize; i++)
{
this.innov[num22 + i] = 0f;
}
Filters.Residue_percep_zero(array4, 0, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, this.buf2, this.subframeSize, this.lpcSize);
for (int i = 0; i < this.subframeSize; i++)
{
num21 += this.buf2[i] * this.buf2[i];
}
num21 = (float)Math.Sqrt((double)(0.1f + num21 / (float)this.subframeSize));
num21 /= num5;
if (this.submodes[this.submodeID].HaveSubframeGain != 0)
{
num21 = (float)Math.Log((double)num21);
if (this.submodes[this.submodeID].HaveSubframeGain == 3)
{
int num23 = VQ.Index(num21, NbCodec.exc_gain_quant_scal3, 8);
bits.Pack(num23, 3);
num21 = NbCodec.exc_gain_quant_scal3[num23];
}
else
{
int num23 = VQ.Index(num21, NbCodec.exc_gain_quant_scal1, 2);
bits.Pack(num23, 1);
num21 = NbCodec.exc_gain_quant_scal1[num23];
}
num21 = (float)Math.Exp((double)num21);
}
else
{
num21 = 1f;
}
num21 *= num5;
float num24 = 1f / num21;
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] *= num24;
}
this.submodes[this.submodeID].Innovation.Quantify(array4, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, this.lpcSize, this.subframeSize, this.innov, num22, array5, bits, this.complexity);
for (int i = 0; i < this.subframeSize; i++)
{
this.innov[num22 + i] *= num21;
}
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] += this.innov[num22 + i];
}
if (this.submodes[this.submodeID].DoubleCodebook != 0)
{
float[] array8 = new float[this.subframeSize];
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] *= 2.2f;
}
this.submodes[this.submodeID].Innovation.Quantify(array4, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, this.lpcSize, this.subframeSize, array8, 0, array5, bits, this.complexity);
for (int i = 0; i < this.subframeSize; i++)
{
array8[i] *= (float)((double)num21 * 0.45454545454545453);
}
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] += array8[i];
}
}
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] *= num21;
}
for (int i = 0; i < this.lpcSize; i++)
{
array6[i] = this.mem_sp[i];
}
Filters.Iir_mem2(this.excBuf, num15, this.interp_qlpc, this.frmBuf, num14, this.subframeSize, this.lpcSize, this.mem_sp);
Filters.Filter_mem2(this.frmBuf, num14, this.bw_lpc1, this.bw_lpc2, this.swBuf, num16, this.subframeSize, this.lpcSize, this.mem_sw, 0);
for (int i = 0; i < this.subframeSize; i++)
{
this.exc2Buf[num17 + i] = this.excBuf[num15 + i];
}
}
if (this.submodeID >= 1)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.old_lsp[i] = this.lsp[i];
}
for (int i = 0; i < this.lpcSize; i++)
{
this.old_qlsp[i] = this.qlsp[i];
}
}
if (this.submodeID == 1)
{
if (this.dtx_count != 0)
{
bits.Pack(15, 4);
}
else
{
bits.Pack(0, 4);
}
}
this.first = 0;
float num25 = 0f;
float num26 = 0f;
for (int i = 0; i < this.frameSize; i++)
{
num25 += this.frmBuf[this.frmIdx + i] * this.frmBuf[this.frmIdx + i];
num26 += (this.frmBuf[this.frmIdx + i] - array7[i]) * (this.frmBuf[this.frmIdx + i] - array7[i]);
}
Math.Log((double)((num25 + 1f) / (num26 + 1f)));
ins0[0] = this.frmBuf[this.frmIdx] + this.preemph * this.pre_mem2;
for (int i = 1; i < this.frameSize; i++)
{
ins0[i] = this.frmBuf[this.frmIdx + i] + this.preemph * ins0[i - 1];
}
this.pre_mem2 = ins0[this.frameSize - 1];
if (this.submodes[this.submodeID].Innovation is NoiseSearch || this.submodeID == 0)
{
this.bounded_pitch = 1;
}
else
{
this.bounded_pitch = 0;
}
return(1);
}
protected internal static void Open_loop_nbest_pitch(float[] sw, int swIdx, int start, int end, int len, int[] pitch, float[] gain, int N)
{
float[] array = new float[N];
float[] array2 = new float[end - start + 1];
float[] array3 = new float[end - start + 2];
float[] array4 = new float[end - start + 1];
for (int i = 0; i < N; i++)
{
array[i] = -1f;
gain[i] = 0f;
pitch[i] = start;
}
array3[0] = Ltp.Inner_prod(sw, swIdx - start, sw, swIdx - start, len);
float num = Ltp.Inner_prod(sw, swIdx, sw, swIdx, len);
for (int i = start; i <= end; i++)
{
array3[i - start + 1] = array3[i - start] + sw[swIdx - i - 1] * sw[swIdx - i - 1] - sw[swIdx - i + len - 1] * sw[swIdx - i + len - 1];
if (array3[i - start + 1] < 1f)
{
array3[i - start + 1] = 1f;
}
}
for (int i = start; i <= end; i++)
{
array2[i - start] = 0f;
array4[i - start] = 0f;
}
for (int i = start; i <= end; i++)
{
array2[i - start] = Ltp.Inner_prod(sw, swIdx, sw, swIdx - i, len);
array4[i - start] = array2[i - start] * array2[i - start] / (array3[i - start] + 1f);
}
for (int i = start; i <= end; i++)
{
if (array4[i - start] > array[N - 1])
{
float num2 = array2[i - start] / (array3[i - start] + 10f);
float num3 = (float)Math.Sqrt((double)(num2 * array2[i - start] / (num + 10f)));
if (num3 > num2)
{
num3 = num2;
}
if (num3 < 0f)
{
num3 = 0f;
}
for (int j = 0; j < N; j++)
{
if (array4[i - start] > array[j])
{
for (int k = N - 1; k > j; k--)
{
array[k] = array[k - 1];
pitch[k] = pitch[k - 1];
gain[k] = gain[k - 1];
}
array[j] = array4[i - start];
pitch[j] = i;
gain[j] = num3;
break;
}
}
}
}
}
private float Pitch_gain_search_3tap(float[] target, float[] ak, float[] awk1, float[] awk2, float[] exc, int es, int pitch, int p, int nsf, Bits bits, float[] exc2, int e2s, float[] r, int[] cdbk_index)
{
float[] array = new float[3];
float[][] array2 = this.CreateJaggedArray <float>(3, 3);
int num = 1 << this.gain_bits;
float[][] array3 = this.CreateJaggedArray <float>(3, nsf);
this.e = this.CreateJaggedArray <float>(3, nsf);
for (int i = 2; i >= 0; i--)
{
int num2 = pitch + 1 - i;
for (int j = 0; j < nsf; j++)
{
if (j - num2 < 0)
{
this.e[i][j] = exc2[e2s + j - num2];
}
else if (j - num2 - pitch < 0)
{
this.e[i][j] = exc2[e2s + j - num2 - pitch];
}
else
{
this.e[i][j] = 0f;
}
}
if (i == 2)
{
Filters.Syn_percep_zero(this.e[i], 0, ak, awk1, awk2, array3[i], nsf, p);
}
else
{
for (int j = 0; j < nsf - 1; j++)
{
array3[i][j + 1] = array3[i + 1][j];
}
array3[i][0] = 0f;
for (int j = 0; j < nsf; j++)
{
array3[i][j] += this.e[i][0] * r[j];
}
}
}
for (int i = 0; i < 3; i++)
{
array[i] = Ltp.Inner_prod(array3[i], 0, target, 0, nsf);
}
for (int i = 0; i < 3; i++)
{
for (int j = 0; j <= i; j++)
{
array2[i][j] = (array2[j][i] = Ltp.Inner_prod(array3[i], 0, array3[j], 0, nsf));
}
}
float[] array4 = new float[9];
int num3 = 0;
float num4 = 0f;
array4[0] = array[2];
array4[1] = array[1];
array4[2] = array[0];
array4[3] = array2[1][2];
array4[4] = array2[0][1];
array4[5] = array2[0][2];
array4[6] = array2[2][2];
array4[7] = array2[1][1];
array4[8] = array2[0][0];
for (int i = 0; i < num; i++)
{
float num5 = 0f;
int num6 = 3 * i;
float num7 = 0.015625f * (float)this.gain_cdbk[num6] + 0.5f;
float num8 = 0.015625f * (float)this.gain_cdbk[num6 + 1] + 0.5f;
float num9 = 0.015625f * (float)this.gain_cdbk[num6 + 2] + 0.5f;
num5 += array4[0] * num7;
num5 += array4[1] * num8;
num5 += array4[2] * num9;
num5 -= array4[3] * num7 * num8;
num5 -= array4[4] * num9 * num8;
num5 -= array4[5] * num9 * num7;
num5 -= 0.5f * array4[6] * num7 * num7;
num5 -= 0.5f * array4[7] * num8 * num8;
num5 -= 0.5f * array4[8] * num9 * num9;
if (num5 > num4 || i == 0)
{
num4 = num5;
num3 = i;
}
}
this.gain[0] = 0.015625f * (float)this.gain_cdbk[num3 * 3] + 0.5f;
this.gain[1] = 0.015625f * (float)this.gain_cdbk[num3 * 3 + 1] + 0.5f;
this.gain[2] = 0.015625f * (float)this.gain_cdbk[num3 * 3 + 2] + 0.5f;
cdbk_index[0] = num3;
for (int i = 0; i < nsf; i++)
{
exc[es + i] = this.gain[0] * this.e[2][i] + this.gain[1] * this.e[1][i] + this.gain[2] * this.e[0][i];
}
float num10 = 0f;
float num11 = 0f;
for (int i = 0; i < nsf; i++)
{
num10 += target[i] * target[i];
}
for (int i = 0; i < nsf; i++)
{
num11 += (target[i] - this.gain[2] * array3[0][i] - this.gain[1] * array3[1][i] - this.gain[0] * array3[2][i]) * (target[i] - this.gain[2] * array3[0][i] - this.gain[1] * array3[1][i] - this.gain[0] * array3[2][i]);
}
return(num11);
}