public virtual int Encode(Bits bits, float[] ins0)
{
Filters.Qmf_decomp(ins0, Codebook_Constants.h0, this.x0d, this.x1d, this.fullFrameSize, 64, this.h0_mem);
this.lowenc.Encode(bits, this.x0d);
for (int i = 0; i < this.windowSize - this.frameSize; i++)
{
this.high[i] = this.high[this.frameSize + i];
}
for (int i = 0; i < this.frameSize; i++)
{
this.high[this.windowSize - this.frameSize + i] = this.x1d[i];
}
Array.Copy(this.excBuf, this.frameSize, this.excBuf, 0, this.bufSize - this.frameSize);
float[] piGain = this.lowenc.PiGain;
float[] exc = this.lowenc.Exc;
float[] innov = this.lowenc.Innov;
int num;
if (this.lowenc.Mode == 0)
{
num = 1;
}
else
{
num = 0;
}
for (int i = 0; i < this.windowSize; i++)
{
this.buf[i] = this.high[i] * this.window[i];
}
Lpc.Autocorr(this.buf, this.autocorr, this.lpcSize + 1, this.windowSize);
this.autocorr[0] += 1f;
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 num2 = Lsp.Lpc2lsp(this.lpc, this.lpcSize, this.lsp, 15, 0.2f);
if (num2 != this.lpcSize)
{
num2 = Lsp.Lpc2lsp(this.lpc, this.lpcSize, this.lsp, 11, 0.02f);
if (num2 != this.lpcSize)
{
for (int i = 0; i < this.lpcSize; i++)
{
this.lsp[i] = (float)Math.Cos(3.1415926535897931 * (double)((float)(i + 1)) / (double)(this.lpcSize + 1));
}
}
}
for (int i = 0; i < this.lpcSize; i++)
{
this.lsp[i] = (float)Math.Acos((double)this.lsp[i]);
}
float num3 = 0f;
for (int i = 0; i < this.lpcSize; i++)
{
num3 += (this.old_lsp[i] - this.lsp[i]) * (this.old_lsp[i] - this.lsp[i]);
}
if ((this.vbr_enabled != 0 || this.vad_enabled != 0) && num == 0)
{
float num4 = 0f;
float num5 = 0f;
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 > 0.1f)
{
num6 = 0.1f;
}
if (num6 < -0.1f)
{
num6 = -0.1f;
}
}
this.vbr_quality += num6;
if (this.vbr_quality > 10f)
{
this.vbr_quality = 10f;
}
if (this.vbr_quality < 0f)
{
this.vbr_quality = 0f;
}
}
for (int i = 0; i < this.frameSize; i++)
{
num4 += this.x0d[i] * this.x0d[i];
num5 += this.high[i] * this.high[i];
}
float num7 = (float)Math.Log((double)((1f + num5) / (1f + num4)));
this.relative_quality = this.lowenc.RelativeQuality;
if (num7 < -4f)
{
num7 = -4f;
}
if (num7 > 2f)
{
num7 = 2f;
}
if (this.vbr_enabled != 0)
{
int num8 = this.nb_modes - 1;
this.relative_quality += 1f * (num7 + 2f);
if (this.relative_quality < -1f)
{
this.relative_quality = -1f;
}
while (num8 != 0)
{
int num9 = (int)Math.Floor((double)this.vbr_quality);
float num10;
if (num9 == 10)
{
num10 = NSpeex.Vbr.hb_thresh[num8][num9];
}
else
{
num10 = (this.vbr_quality - (float)num9) * NSpeex.Vbr.hb_thresh[num8][num9 + 1] + ((float)(1 + num9) - this.vbr_quality) * NSpeex.Vbr.hb_thresh[num8][num9];
}
if (this.relative_quality >= num10)
{
break;
}
num8--;
}
this.Mode = num8;
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 += 1f;
}
}
else
{
int submodeID;
if ((double)this.relative_quality < 2.0)
{
submodeID = 1;
}
else
{
submodeID = this.submodeSelect;
}
this.submodeID = submodeID;
}
}
bits.Pack(1, 1);
if (num != 0)
{
bits.Pack(0, 3);
}
else
{
bits.Pack(this.submodeID, 3);
}
if (num == 0 && this.submodes[this.submodeID] != null)
{
this.submodes[this.submodeID].LsqQuant.Quant(this.lsp, this.qlsp, this.lpcSize, bits);
if (this.first != 0)
{
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];
}
}
float[] array = new float[this.lpcSize];
float[] array2 = new float[this.subframeSize];
float[] array3 = new float[this.subframeSize];
for (int j = 0; j < this.nbSubframes; j++)
{
float num11 = 0f;
float num12 = 0f;
int num13 = this.subframeSize * j;
int num14 = num13;
int num15 = this.excIdx + num13;
int num16 = num13;
int num17 = num13;
float num18 = (1f + (float)j) / (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, 0.05f);
Lsp.Enforce_margin(this.interp_qlsp, this.lpcSize, 0.05f);
for (int i = 0; i < this.lpcSize; i++)
{
this.interp_lsp[i] = (float)Math.Cos((double)this.interp_lsp[i]);
}
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_lsp, this.interp_lpc, this.lpcSize);
this.m_lsp.Lsp2lpc(this.interp_qlsp, this.interp_qlpc, this.lpcSize);
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);
float num19 = 0f;
num18 = 1f;
this.pi_gain[j] = 0f;
for (int i = 0; i <= this.lpcSize; i++)
{
num19 += num18 * this.interp_qlpc[i];
num18 = -num18;
this.pi_gain[j] += this.interp_qlpc[i];
}
float value = piGain[j];
value = 1f / (Math.Abs(value) + 0.01f);
num19 = 1f / (Math.Abs(num19) + 0.01f);
float num20 = Math.Abs(0.01f + num19) / (0.01f + Math.Abs(value));
Filters.Fir_mem2(this.high, num14, this.interp_qlpc, this.excBuf, num15, this.subframeSize, this.lpcSize, this.mem_sp2);
for (int i = 0; i < this.subframeSize; i++)
{
num11 += this.excBuf[num15 + i] * this.excBuf[num15 + i];
}
if (this.submodes[this.submodeID].Innovation == null)
{
for (int i = 0; i < this.subframeSize; i++)
{
num12 += innov[num13 + i] * innov[num13 + i];
}
float num21 = num11 / (0.01f + num12);
num21 = (float)Math.Sqrt((double)num21);
num21 *= num20;
int num22 = (int)Math.Floor(10.5 + 8.0 * Math.Log((double)num21 + 0.0001));
if (num22 < 0)
{
num22 = 0;
}
if (num22 > 31)
{
num22 = 31;
}
bits.Pack(num22, 5);
num21 = (float)(0.1 * Math.Exp((double)num22 / 9.4));
num21 /= num20;
}
else
{
for (int i = 0; i < this.subframeSize; i++)
{
num12 += exc[num13 + i] * exc[num13 + i];
}
float num23 = (float)(Math.Sqrt((double)(1f + num11)) * (double)num20 / Math.Sqrt((double)((1f + num12) * (float)this.subframeSize)));
int num24 = (int)Math.Floor(0.5 + 3.7 * (Math.Log((double)num23) + 2.0));
if (num24 < 0)
{
num24 = 0;
}
if (num24 > 15)
{
num24 = 15;
}
bits.Pack(num24, 4);
num23 = (float)Math.Exp(0.27027027027027023 * (double)num24 - 2.0);
float num25 = num23 * (float)Math.Sqrt((double)(1f + num12)) / num20;
float num26 = 1f / num25;
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, array2, this.subframeSize, this.lpcSize);
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] = 0f;
}
for (int i = 0; i < this.lpcSize; i++)
{
array[i] = this.mem_sp[i];
}
Filters.Iir_mem2(this.excBuf, num15, this.interp_qlpc, this.excBuf, num15, this.subframeSize, this.lpcSize, array);
for (int i = 0; i < this.lpcSize; i++)
{
array[i] = this.mem_sw[i];
}
Filters.Filter_mem2(this.excBuf, num15, this.bw_lpc1, this.bw_lpc2, this.res, num16, this.subframeSize, this.lpcSize, array, 0);
for (int i = 0; i < this.lpcSize; i++)
{
array[i] = this.mem_sw[i];
}
Filters.Filter_mem2(this.high, num14, this.bw_lpc1, this.bw_lpc2, this.swBuf, num17, this.subframeSize, this.lpcSize, array, 0);
for (int i = 0; i < this.subframeSize; i++)
{
this.target[i] = this.swBuf[num17 + i] - this.res[num16 + i];
}
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] = 0f;
}
for (int i = 0; i < this.subframeSize; i++)
{
this.target[i] *= num26;
}
for (int i = 0; i < this.subframeSize; i++)
{
array3[i] = 0f;
}
this.submodes[this.submodeID].Innovation.Quantify(this.target, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, this.lpcSize, this.subframeSize, array3, 0, array2, bits, this.complexity + 1 >> 1);
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] += array3[i] * num25;
}
if (this.submodes[this.submodeID].DoubleCodebook != 0)
{
float[] array4 = new float[this.subframeSize];
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] = 0f;
}
for (int i = 0; i < this.subframeSize; i++)
{
this.target[i] *= 2.5f;
}
this.submodes[this.submodeID].Innovation.Quantify(this.target, this.interp_qlpc, this.bw_lpc1, this.bw_lpc2, this.lpcSize, this.subframeSize, array4, 0, array2, bits, this.complexity + 1 >> 1);
for (int i = 0; i < this.subframeSize; i++)
{
array4[i] *= (float)((double)num25 * 0.4);
}
for (int i = 0; i < this.subframeSize; i++)
{
this.excBuf[num15 + i] += array4[i];
}
}
}
for (int i = 0; i < this.lpcSize; i++)
{
array[i] = this.mem_sp[i];
}
Filters.Iir_mem2(this.excBuf, num15, this.interp_qlpc, this.high, num14, this.subframeSize, this.lpcSize, this.mem_sp);
Filters.Filter_mem2(this.high, num14, this.bw_lpc1, this.bw_lpc2, this.swBuf, num17, this.subframeSize, this.lpcSize, this.mem_sw, 0);
}
this.filters.Fir_mem_up(this.x0d, Codebook_Constants.h0, this.y0, this.fullFrameSize, 64, this.g0_mem);
this.filters.Fir_mem_up(this.high, Codebook_Constants.h1, this.y1, this.fullFrameSize, 64, this.g1_mem);
for (int i = 0; i < this.fullFrameSize; i++)
{
ins0[i] = 2f * (this.y0[i] - this.y1[i]);
}
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];
}
this.first = 0;
return(1);
}
for (int i = 0; i < this.frameSize; i++)
{
this.excBuf[this.excIdx + i] = (this.swBuf[i] = 0f);
}
for (int i = 0; i < this.lpcSize; i++)
{
this.mem_sw[i] = 0f;
}
this.first = 1;
Filters.Iir_mem2(this.excBuf, this.excIdx, this.interp_qlpc, this.high, 0, this.subframeSize, this.lpcSize, this.mem_sp);
this.filters.Fir_mem_up(this.x0d, Codebook_Constants.h0, this.y0, this.fullFrameSize, 64, this.g0_mem);
this.filters.Fir_mem_up(this.high, Codebook_Constants.h1, this.y1, this.fullFrameSize, 64, this.g1_mem);
for (int i = 0; i < this.fullFrameSize; i++)
{
ins0[i] = 2f * (this.y0[i] - this.y1[i]);
}
if (num != 0)
{
return(0);
}
return(1);
}
