Updating Opus to a pre-release of 1.1

src/mlp_train.h

-/* Copyright (c) 2009-2010 Xiph.Org Foundation
+/* Copyright (c) 2008-2011 Octasic Inc.
    Written by Jean-Marc Valin */
 /*
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    - Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 
    - Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
-#ifndef PLC_H
-#define PLC_H
+#ifndef _MLP_TRAIN_H_
+#define _MLP_TRAIN_H_
 
-#include "arch.h"
+#include <math.h>
+#include <stdlib.h>
 
-#define LPC_ORDER 24
+double tansig_table[501];
+static inline double tansig_double(double x) 
+{
+        return 2./(1.+exp(-2.*x)) - 1.;
+}
+static inline void build_tansig_table()
+{
+        int i;
+        for (i=0;i<501;i++)
+                tansig_table[i] = tansig_double(.04*(i-250));
+}
 
-void _celt_lpc(opus_val16 *_lpc, const opus_val32 *ac, int p);
+static inline double tansig_approx(double x)
+{
+        int i;
+        double y, dy;
+        if (x>=10)
+                return 1;
+        if (x<=-10)
+                return -1;
+        i = lrint(25*x);
+        x -= .04*i;
+        y = tansig_table[250+i];
+        dy = 1-y*y;
+        y = y + x*dy*(1 - y*x);
+        return y;
+}
 
-void celt_fir(const opus_val16 *x,
-         const opus_val16 *num,
-         opus_val16 *y,
-         int N,
-         int ord,
-         opus_val16 *mem);
+inline float randn(float sd)
+{
+   float U1, U2, S, x;
+   do {
+      U1 = ((float)rand())/RAND_MAX;
+      U2 = ((float)rand())/RAND_MAX;
+      U1 = 2*U1-1;
+      U2 = 2*U2-1;
+      S = U1*U1 + U2*U2;
+   } while (S >= 1 || S == 0.0f);
+   x = sd*sqrt(-2 * log(S) / S) * U1;
+   return x;
+}
 
-void celt_iir(const opus_val32 *x,
-         const opus_val16 *den,
-         opus_val32 *y,
-         int N,
-         int ord,
-         opus_val16 *mem);
 
-void _celt_autocorr(const opus_val16 *x, opus_val32 *ac, const opus_val16 *window, int overlap, int lag, int n);
+typedef struct {
+        int layers;
+        int *topo;
+        double **weights;
+        double **best_weights;
+        double *in_rate;
+} MLPTrain;
 
-#endif /* PLC_H */
+
+#endif /* _MLP_TRAIN_H_ */