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62 lines
2.8 KiB
Java
62 lines
2.8 KiB
Java
/*
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* Decompiled with CFR 0.152.
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*/
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package de.maxhenkel.voicechat.concentus;
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import de.maxhenkel.voicechat.concentus.BoxedValueByte;
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import de.maxhenkel.voicechat.concentus.Inlines;
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class GainQuantization {
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private static final int OFFSET = 2090;
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private static final int SCALE_Q16 = 2251;
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private static final int INV_SCALE_Q16 = 1907825;
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GainQuantization() {
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}
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static void silk_gains_quant(byte[] ind, int[] gain_Q16, BoxedValueByte prev_ind, int conditional, int nb_subfr) {
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for (int k = 0; k < nb_subfr; ++k) {
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ind[k] = (byte)Inlines.silk_SMULWB(2251, Inlines.silk_lin2log(gain_Q16[k]) - 2090);
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if (ind[k] < prev_ind.Val) {
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int n = k;
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ind[n] = (byte)(ind[n] + 1);
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}
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ind[k] = (byte)Inlines.silk_LIMIT_int(ind[k], 0, 63);
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if (k == 0 && conditional == 0) {
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ind[k] = (byte)Inlines.silk_LIMIT_int(ind[k], prev_ind.Val + -4, 63);
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prev_ind.Val = ind[k];
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} else {
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ind[k] = (byte)(ind[k] - prev_ind.Val);
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int double_step_size_threshold = 8 + prev_ind.Val;
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if (ind[k] > double_step_size_threshold) {
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ind[k] = (byte)(double_step_size_threshold + Inlines.silk_RSHIFT(ind[k] - double_step_size_threshold + 1, 1));
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}
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ind[k] = (byte)Inlines.silk_LIMIT_int(ind[k], -4, 36);
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prev_ind.Val = ind[k] > double_step_size_threshold ? (byte)(prev_ind.Val + (byte)(Inlines.silk_LSHIFT(ind[k], 1) - double_step_size_threshold)) : (byte)(prev_ind.Val + ind[k]);
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int n = k;
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ind[n] = (byte)(ind[n] - -4);
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}
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gain_Q16[k] = Inlines.silk_log2lin(Inlines.silk_min_32(Inlines.silk_SMULWB(1907825, prev_ind.Val) + 2090, 3967));
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}
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}
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static void silk_gains_dequant(int[] gain_Q16, byte[] ind, BoxedValueByte prev_ind, int conditional, int nb_subfr) {
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for (int k = 0; k < nb_subfr; ++k) {
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int double_step_size_threshold;
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int ind_tmp;
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prev_ind.Val = k == 0 && conditional == 0 ? (byte)Inlines.silk_max_int(ind[k], prev_ind.Val - 16) : ((ind_tmp = ind[k] + -4) > (double_step_size_threshold = 8 + prev_ind.Val) ? (byte)(prev_ind.Val + (byte)(Inlines.silk_LSHIFT(ind_tmp, 1) - double_step_size_threshold)) : (byte)(prev_ind.Val + (byte)ind_tmp));
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prev_ind.Val = (byte)Inlines.silk_LIMIT_int(prev_ind.Val, 0, 63);
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gain_Q16[k] = Inlines.silk_log2lin(Inlines.silk_min_32(Inlines.silk_SMULWB(1907825, prev_ind.Val) + 2090, 3967));
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}
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}
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static int silk_gains_ID(byte[] ind, int nb_subfr) {
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int gainsID = 0;
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for (int k = 0; k < nb_subfr; ++k) {
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gainsID = Inlines.silk_ADD_LSHIFT32(ind[k], gainsID, 8);
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}
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return gainsID;
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}
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}
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