swap to new ilbc library

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12095 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/ilbc/src/hpInput.c

@@ -0,0 +1,70 @@
+/*
+ * iLBC - a library for the iLBC codec
+ *
+ * hpInput.c - The iLBC low bit rate speech codec.
+ *
+ * Adapted by Steve Underwood <steveu@coppice.org> from the reference
+ * iLBC code supplied in RFC3951.
+ *
+ * Original code Copyright (C) The Internet Society (2004).
+ * All changes to produce this version Copyright (C) 2008 by Steve Underwood
+ * All Rights Reserved.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: hpInput.c,v 1.2 2008/03/06 12:27:38 steveu Exp $
+ */
+
+/*! \file */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <inttypes.h>
+
+#include "constants.h"
+#include "hpInput.h"
+
+/*----------------------------------------------------------------*
+ *  Input high-pass filter
+ *---------------------------------------------------------------*/
+
+void hpInput(const float *In,   /* (i) vector to filter */
+             int len,           /* (i) length of vector to filter */
+             float *Out,        /* (o) the resulting filtered vector */
+             float *mem)        /* (i/o) the filter state */
+{
+    int i;
+    const float *pi;
+    float *po;
+
+    /* all-zero section*/
+    pi = &In[0];
+    po = &Out[0];
+    for (i = 0;  i < len;  i++)
+    {
+        *po = hpi_zero_coefsTbl[0]*(*pi);
+        *po += hpi_zero_coefsTbl[1]*mem[0];
+        *po += hpi_zero_coefsTbl[2]*mem[1];
+
+        mem[1] = mem[0];
+        mem[0] = *pi;
+        po++;
+        pi++;
+    }
+
+    /* all-pole section*/
+    po = &Out[0];
+    for (i = 0;  i < len;  i++)
+    {
+        *po -= hpi_pole_coefsTbl[1]*mem[2];
+        *po -= hpi_pole_coefsTbl[2]*mem[3];
+
+        mem[3] = mem[2];
+        mem[2] = *po;
+        po++;
+    }
+}