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

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+/*
+ * Decompiled with CFR 0.152.
+ */
+package de.maxhenkel.voicechat.concentus;
+
+import de.maxhenkel.voicechat.concentus.ApplySineWindow;
+import de.maxhenkel.voicechat.concentus.Arrays;
+import de.maxhenkel.voicechat.concentus.Autocorrelation;
+import de.maxhenkel.voicechat.concentus.BWExpander;
+import de.maxhenkel.voicechat.concentus.BoxedValueByte;
+import de.maxhenkel.voicechat.concentus.BoxedValueInt;
+import de.maxhenkel.voicechat.concentus.BoxedValueShort;
+import de.maxhenkel.voicechat.concentus.Filters;
+import de.maxhenkel.voicechat.concentus.Inlines;
+import de.maxhenkel.voicechat.concentus.K2A;
+import de.maxhenkel.voicechat.concentus.PitchAnalysisCore;
+import de.maxhenkel.voicechat.concentus.Schur;
+import de.maxhenkel.voicechat.concentus.SilkChannelEncoder;
+import de.maxhenkel.voicechat.concentus.SilkEncoderControl;
+
+class FindPitchLags {
+    FindPitchLags() {
+    }
+
+    static void silk_find_pitch_lags(SilkChannelEncoder psEnc, SilkEncoderControl psEncCtrl, short[] res, short[] x, int x_ptr) {
+        int[] auto_corr = new int[17];
+        short[] rc_Q15 = new short[16];
+        int[] A_Q24 = new int[16];
+        short[] A_Q12 = new short[16];
+        int buf_len = psEnc.la_pitch + psEnc.frame_length + psEnc.ltp_mem_length;
+        Inlines.OpusAssert(buf_len >= psEnc.pitch_LPC_win_length);
+        int x_buf = x_ptr - psEnc.ltp_mem_length;
+        short[] Wsig = new short[psEnc.pitch_LPC_win_length];
+        int x_buf_ptr = x_buf + buf_len - psEnc.pitch_LPC_win_length;
+        int Wsig_ptr = 0;
+        ApplySineWindow.silk_apply_sine_window(Wsig, Wsig_ptr, x, x_buf_ptr, 1, psEnc.la_pitch);
+        System.arraycopy(x, x_buf_ptr += psEnc.la_pitch, Wsig, Wsig_ptr += psEnc.la_pitch, psEnc.pitch_LPC_win_length - Inlines.silk_LSHIFT(psEnc.la_pitch, 1));
+        ApplySineWindow.silk_apply_sine_window(Wsig, Wsig_ptr += psEnc.pitch_LPC_win_length - Inlines.silk_LSHIFT(psEnc.la_pitch, 1), x, x_buf_ptr += psEnc.pitch_LPC_win_length - Inlines.silk_LSHIFT(psEnc.la_pitch, 1), 2, psEnc.la_pitch);
+        BoxedValueInt boxed_scale = new BoxedValueInt(0);
+        Autocorrelation.silk_autocorr(auto_corr, boxed_scale, Wsig, psEnc.pitch_LPC_win_length, psEnc.pitchEstimationLPCOrder + 1);
+        int scale = boxed_scale.Val;
+        auto_corr[0] = Inlines.silk_SMLAWB(auto_corr[0], auto_corr[0], 66) + 1;
+        int res_nrg = Schur.silk_schur(rc_Q15, auto_corr, psEnc.pitchEstimationLPCOrder);
+        psEncCtrl.predGain_Q16 = Inlines.silk_DIV32_varQ(auto_corr[0], Inlines.silk_max_int(res_nrg, 1), 16);
+        K2A.silk_k2a(A_Q24, rc_Q15, psEnc.pitchEstimationLPCOrder);
+        for (int i = 0; i < psEnc.pitchEstimationLPCOrder; ++i) {
+            A_Q12[i] = (short)Inlines.silk_SAT16(Inlines.silk_RSHIFT(A_Q24[i], 12));
+        }
+        BWExpander.silk_bwexpander(A_Q12, psEnc.pitchEstimationLPCOrder, 64881);
+        Filters.silk_LPC_analysis_filter(res, 0, x, x_buf, A_Q12, 0, buf_len, psEnc.pitchEstimationLPCOrder);
+        if (psEnc.indices.signalType != 0 && psEnc.first_frame_after_reset == 0) {
+            int thrhld_Q13 = 4915;
+            thrhld_Q13 = Inlines.silk_SMLABB(thrhld_Q13, -32, psEnc.pitchEstimationLPCOrder);
+            thrhld_Q13 = Inlines.silk_SMLAWB(thrhld_Q13, -209714, psEnc.speech_activity_Q8);
+            thrhld_Q13 = Inlines.silk_SMLABB(thrhld_Q13, -1228, Inlines.silk_RSHIFT(psEnc.prevSignalType, 1));
+            thrhld_Q13 = Inlines.silk_SMLAWB(thrhld_Q13, -1637, psEnc.input_tilt_Q15);
+            BoxedValueShort boxed_lagIndex = new BoxedValueShort(psEnc.indices.lagIndex);
+            BoxedValueByte boxed_contourIndex = new BoxedValueByte(psEnc.indices.contourIndex);
+            BoxedValueInt boxed_LTPcorr = new BoxedValueInt(psEnc.LTPCorr_Q15);
+            psEnc.indices.signalType = PitchAnalysisCore.silk_pitch_analysis_core(res, psEncCtrl.pitchL, boxed_lagIndex, boxed_contourIndex, boxed_LTPcorr, psEnc.prevLag, psEnc.pitchEstimationThreshold_Q16, thrhld_Q13 = Inlines.silk_SAT16(thrhld_Q13), psEnc.fs_kHz, psEnc.pitchEstimationComplexity, psEnc.nb_subfr) == 0 ? (byte)2 : (byte)1;
+            psEnc.indices.lagIndex = boxed_lagIndex.Val;
+            psEnc.indices.contourIndex = boxed_contourIndex.Val;
+            psEnc.LTPCorr_Q15 = boxed_LTPcorr.Val;
+        } else {
+            Arrays.MemSet(psEncCtrl.pitchL, 0, 4);
+            psEnc.indices.lagIndex = 0;
+            psEnc.indices.contourIndex = 0;
+            psEnc.LTPCorr_Q15 = 0;
+        }
+    }
+}
+