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source/decompiled/de/maxhenkel/voicechat/concentus/Sigmoid.java

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+/*
+ * Decompiled with CFR 0.152.
+ */
+package de.maxhenkel.voicechat.concentus;
+
+import de.maxhenkel.voicechat.concentus.Inlines;
+
+class Sigmoid {
+    private static final int[] sigm_LUT_slope_Q10 = new int[]{237, 153, 73, 30, 12, 7};
+    private static final int[] sigm_LUT_pos_Q15 = new int[]{16384, 23955, 28861, 31213, 32178, 32548};
+    private static final int[] sigm_LUT_neg_Q15 = new int[]{16384, 8812, 3906, 1554, 589, 219};
+
+    Sigmoid() {
+    }
+
+    static int silk_sigm_Q15(int in_Q5) {
+        if (in_Q5 < 0) {
+            if ((in_Q5 = -in_Q5) >= 192) {
+                return 0;
+            }
+            int ind = Inlines.silk_RSHIFT(in_Q5, 5);
+            return sigm_LUT_neg_Q15[ind] - Inlines.silk_SMULBB(sigm_LUT_slope_Q10[ind], in_Q5 & 0x1F);
+        }
+        if (in_Q5 >= 192) {
+            return Short.MAX_VALUE;
+        }
+        int ind = Inlines.silk_RSHIFT(in_Q5, 5);
+        return sigm_LUT_pos_Q15[ind] + Inlines.silk_SMULBB(sigm_LUT_slope_Q10[ind], in_Q5 & 0x1F);
+    }
+}
+