first commit

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

@@ -0,0 +1,42 @@
+/*
+ * Decompiled with CFR 0.152.
+ */
+package de.maxhenkel.voicechat.concentus;
+
+import de.maxhenkel.voicechat.concentus.Filters;
+import de.maxhenkel.voicechat.concentus.Inlines;
+
+class SilkLPState {
+    final int[] In_LP_State = new int[2];
+    int transition_frame_no = 0;
+    int mode = 0;
+
+    SilkLPState() {
+    }
+
+    void Reset() {
+        this.In_LP_State[0] = 0;
+        this.In_LP_State[1] = 0;
+        this.transition_frame_no = 0;
+        this.mode = 0;
+    }
+
+    void silk_LP_variable_cutoff(short[] frame, int frame_ptr, int frame_length) {
+        int[] B_Q28 = new int[3];
+        int[] A_Q28 = new int[2];
+        int fac_Q16 = 0;
+        int ind = 0;
+        Inlines.OpusAssert(this.transition_frame_no >= 0 && this.transition_frame_no <= 256);
+        if (this.mode != 0) {
+            fac_Q16 = Inlines.silk_LSHIFT(256 - this.transition_frame_no, 10);
+            ind = Inlines.silk_RSHIFT(fac_Q16, 16);
+            Inlines.OpusAssert(ind >= 0);
+            Inlines.OpusAssert(ind < 5);
+            Filters.silk_LP_interpolate_filter_taps(B_Q28, A_Q28, ind, fac_Q16 -= Inlines.silk_LSHIFT(ind, 16));
+            this.transition_frame_no = Inlines.silk_LIMIT(this.transition_frame_no + this.mode, 0, 256);
+            Inlines.OpusAssert(true);
+            Filters.silk_biquad_alt(frame, frame_ptr, B_Q28, A_Q28, this.In_LP_State, frame, frame_ptr, frame_length, 1);
+        }
+    }
+}
+