namespace NSpeex
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{
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using System;
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internal class SbCodec : NbCodec
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{
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protected internal float foldingGain;
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protected internal int fullFrameSize;
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protected internal float[] g0_mem;
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protected internal float[] g1_mem;
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protected internal float[] high;
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public const int QMF_ORDER = 0x40;
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public static readonly int[] SB_FRAME_SIZE = new int[] { 4, 0x24, 0x70, 0xc0, 0x160, -1, -1, -1 };
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public const int SB_SUBMODE_BITS = 3;
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public const int SB_SUBMODES = 8;
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protected internal float[] x0d;
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protected internal float[] y0;
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protected internal float[] y1;
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public SbCodec(bool ultraWide)
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{
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if (ultraWide)
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{
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base.submodes = BuildUwbSubModes();
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base.submodeID = 1;
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}
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else
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{
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base.submodes = BuildWbSubModes();
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base.submodeID = 3;
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}
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}
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protected internal static SubMode[] BuildUwbSubModes()
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{
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HighLspQuant lspQuant = new HighLspQuant();
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SubMode[] modeArray = new SubMode[8];
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modeArray[1] = new SubMode(0, 0, 1, 0, lspQuant, null, null, 0.75f, 0.75f, -1f, 2);
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return modeArray;
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}
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protected internal static SubMode[] BuildWbSubModes()
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{
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HighLspQuant lspQuant = new HighLspQuant();
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SplitShapeSearch innovation = new SplitShapeSearch(40, 10, 4, Codebook_Constants.hexc_10_32_table, 5, 0);
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SplitShapeSearch search2 = new SplitShapeSearch(40, 8, 5, Codebook_Constants.hexc_table, 7, 1);
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SubMode[] modeArray = new SubMode[8];
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modeArray[1] = new SubMode(0, 0, 1, 0, lspQuant, null, null, 0.75f, 0.75f, -1f, 0x24);
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modeArray[2] = new SubMode(0, 0, 1, 0, lspQuant, null, innovation, 0.85f, 0.6f, -1f, 0x70);
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modeArray[3] = new SubMode(0, 0, 1, 0, lspQuant, null, search2, 0.75f, 0.7f, -1f, 0xc0);
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modeArray[4] = new SubMode(0, 0, 1, 1, lspQuant, null, search2, 0.75f, 0.75f, -1f, 0x160);
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return modeArray;
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}
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protected virtual void Init(int frameSize, int subframeSize, int lpcSize, int bufSize, float foldingGain_0)
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{
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base.Init(frameSize, subframeSize, lpcSize, bufSize);
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this.fullFrameSize = 2 * frameSize;
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this.foldingGain = foldingGain_0;
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base.lag_factor = 0.002f;
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this.high = new float[this.fullFrameSize];
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this.y0 = new float[this.fullFrameSize];
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this.y1 = new float[this.fullFrameSize];
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this.x0d = new float[frameSize];
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this.g0_mem = new float[0x40];
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this.g1_mem = new float[0x40];
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}
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public bool Dtx { get { return (base.dtx_enabled != 0); } }
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public override float[] Exc {
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get {
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float[] numArray = new float[this.fullFrameSize];
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for (int i = 0; i < base.frameSize; i++)
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{
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numArray[2 * i] = 2f * base.excBuf[base.excIdx + i];
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}
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return numArray;
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}
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}
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public override int FrameSize { get { return this.fullFrameSize; } }
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public override float[] Innov { get { return this.Exc; } }
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}
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}
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