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66 lines
2.3 KiB
Java
66 lines
2.3 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.EntropyCoder;
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import de.maxhenkel.voicechat.concentus.Inlines;
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import de.maxhenkel.voicechat.concentus.SilkTables;
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class CodeSigns {
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CodeSigns() {
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}
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private static int silk_enc_map(int a) {
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return Inlines.silk_RSHIFT(a, 15) + 1;
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}
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private static int silk_dec_map(int a) {
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return Inlines.silk_LSHIFT(a, 1) - 1;
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}
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static void silk_encode_signs(EntropyCoder psRangeEnc, byte[] pulses, int length, int signalType, int quantOffsetType, int[] sum_pulses) {
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int i;
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short[] icdf = new short[2];
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short[] sign_icdf = SilkTables.silk_sign_iCDF;
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icdf[1] = 0;
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int q_ptr = 0;
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int icdf_ptr = i = Inlines.silk_SMULBB(7, Inlines.silk_ADD_LSHIFT(quantOffsetType, signalType, 1));
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length = Inlines.silk_RSHIFT(length + 8, 4);
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for (i = 0; i < length; ++i) {
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int p = sum_pulses[i];
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if (p > 0) {
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icdf[0] = sign_icdf[icdf_ptr + Inlines.silk_min(p & 0x1F, 6)];
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for (int j = q_ptr; j < q_ptr + 16; ++j) {
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if (pulses[j] == 0) continue;
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psRangeEnc.enc_icdf(CodeSigns.silk_enc_map(pulses[j]), icdf, 8);
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}
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}
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q_ptr += 16;
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}
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}
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static void silk_decode_signs(EntropyCoder psRangeDec, short[] pulses, int length, int signalType, int quantOffsetType, int[] sum_pulses) {
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int i;
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short[] icdf = new short[2];
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short[] icdf_table = SilkTables.silk_sign_iCDF;
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icdf[1] = 0;
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int q_ptr = 0;
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int icdf_ptr = i = Inlines.silk_SMULBB(7, Inlines.silk_ADD_LSHIFT(quantOffsetType, signalType, 1));
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length = Inlines.silk_RSHIFT(length + 8, 4);
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for (i = 0; i < length; ++i) {
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int p = sum_pulses[i];
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if (p > 0) {
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icdf[0] = icdf_table[icdf_ptr + Inlines.silk_min(p & 0x1F, 6)];
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for (int j = 0; j < 16; ++j) {
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if (pulses[q_ptr + j] <= 0) continue;
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int n = q_ptr + j;
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pulses[n] = (short)(pulses[n] * (short)CodeSigns.silk_dec_map(psRangeDec.dec_icdf(icdf, 8)));
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}
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}
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q_ptr += 16;
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}
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}
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}
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