first commit

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

@@ -0,0 +1,46 @@
+/*
+ * Decompiled with CFR 0.152.
+ */
+package de.maxhenkel.voicechat.concentus;
+
+import de.maxhenkel.voicechat.concentus.Inlines;
+
+class ApplySineWindow {
+    private static final short[] freq_table_Q16 = new short[]{12111, 9804, 8235, 7100, 6239, 5565, 5022, 4575, 4202, 3885, 3612, 3375, 3167, 2984, 2820, 2674, 2542, 2422, 2313, 2214, 2123, 2038, 1961, 1889, 1822, 1760, 1702};
+
+    ApplySineWindow() {
+    }
+
+    static void silk_apply_sine_window(short[] px_win, int px_win_ptr, short[] px, int px_ptr, int win_type, int length) {
+        int S1_Q16;
+        int S0_Q16;
+        Inlines.OpusAssert(win_type == 1 || win_type == 2);
+        Inlines.OpusAssert(length >= 16 && length <= 120);
+        Inlines.OpusAssert((length & 3) == 0);
+        int k = (length >> 2) - 4;
+        Inlines.OpusAssert(k >= 0 && k <= 26);
+        short f_Q16 = freq_table_Q16[k];
+        int c_Q16 = Inlines.silk_SMULWB(f_Q16, -f_Q16);
+        Inlines.OpusAssert(c_Q16 >= Short.MIN_VALUE);
+        if (win_type == 1) {
+            S0_Q16 = 0;
+            S1_Q16 = f_Q16 + Inlines.silk_RSHIFT(length, 3);
+        } else {
+            S0_Q16 = 65536;
+            S1_Q16 = 65536 + Inlines.silk_RSHIFT(c_Q16, 1) + Inlines.silk_RSHIFT(length, 4);
+        }
+        for (k = 0; k < length; k += 4) {
+            int pxwk = px_win_ptr + k;
+            int pxk = px_ptr + k;
+            px_win[pxwk] = (short)Inlines.silk_SMULWB(Inlines.silk_RSHIFT(S0_Q16 + S1_Q16, 1), px[pxk]);
+            px_win[pxwk + 1] = (short)Inlines.silk_SMULWB(S1_Q16, px[pxk + 1]);
+            S0_Q16 = Inlines.silk_SMULWB(S1_Q16, c_Q16) + Inlines.silk_LSHIFT(S1_Q16, 1) - S0_Q16 + 1;
+            S0_Q16 = Inlines.silk_min(S0_Q16, 65536);
+            px_win[pxwk + 2] = (short)Inlines.silk_SMULWB(Inlines.silk_RSHIFT(S0_Q16 + S1_Q16, 1), px[pxk + 2]);
+            px_win[pxwk + 3] = (short)Inlines.silk_SMULWB(S0_Q16, px[pxk + 3]);
+            S1_Q16 = Inlines.silk_SMULWB(S0_Q16, c_Q16) + Inlines.silk_LSHIFT(S0_Q16, 1) - S1_Q16;
+            S1_Q16 = Inlines.silk_min(S1_Q16, 65536);
+        }
+    }
+}
+