diff --git a/pjmedia/src/pjmedia-codec/ilbc/getCBvec.c b/pjmedia/src/pjmedia-codec/ilbc/getCBvec.c
new file mode 100644
index 0000000..4f2d291
--- /dev/null
+++ b/pjmedia/src/pjmedia-codec/ilbc/getCBvec.c
@@ -0,0 +1,193 @@
+
+   /******************************************************************
+
+       iLBC Speech Coder ANSI-C Source Code
+
+       getCBvec.c
+
+       Copyright (C) The Internet Society (2004).
+       All Rights Reserved.
+
+   ******************************************************************/
+
+   #include "iLBC_define.h"
+   #include "constants.h"
+   #include <string.h>
+
+   /*----------------------------------------------------------------*
+    *  Construct codebook vector for given index.
+    *---------------------------------------------------------------*/
+
+   void getCBvec(
+
+
+
+
+
+       float *cbvec,   /* (o) Constructed codebook vector */
+       float *mem,     /* (i) Codebook buffer */
+       int index,      /* (i) Codebook index */
+       int lMem,       /* (i) Length of codebook buffer */
+       int cbveclen/* (i) Codebook vector length */
+   ){
+       int j, k, n, memInd, sFilt;
+       float tmpbuf[CB_MEML];
+       int base_size;
+       int ilow, ihigh;
+       float alfa, alfa1;
+
+       /* Determine size of codebook sections */
+
+       base_size=lMem-cbveclen+1;
+
+       if (cbveclen==SUBL) {
+           base_size+=cbveclen/2;
+       }
+
+       /* No filter -> First codebook section */
+
+       if (index<lMem-cbveclen+1) {
+
+           /* first non-interpolated vectors */
+
+           k=index+cbveclen;
+           /* get vector */
+           memcpy(cbvec, mem+lMem-k, cbveclen*sizeof(float));
+
+       } else if (index < base_size) {
+
+           k=2*(index-(lMem-cbveclen+1))+cbveclen;
+
+           ihigh=k/2;
+           ilow=ihigh-5;
+
+           /* Copy first noninterpolated part */
+
+           memcpy(cbvec, mem+lMem-k/2, ilow*sizeof(float));
+
+           /* interpolation */
+
+           alfa1=(float)0.2;
+           alfa=0.0;
+           for (j=ilow; j<ihigh; j++) {
+               cbvec[j]=((float)1.0-alfa)*mem[lMem-k/2+j]+
+                   alfa*mem[lMem-k+j];
+
+
+
+
+
+               alfa+=alfa1;
+           }
+
+           /* Copy second noninterpolated part */
+
+           memcpy(cbvec+ihigh, mem+lMem-k+ihigh,
+               (cbveclen-ihigh)*sizeof(float));
+
+       }
+
+       /* Higher codebook section based on filtering */
+
+       else {
+
+           /* first non-interpolated vectors */
+
+           if (index-base_size<lMem-cbveclen+1) {
+               float tempbuff2[CB_MEML+CB_FILTERLEN+1];
+               float *pos;
+               float *pp, *pp1;
+
+               memset(tempbuff2, 0,
+                   CB_HALFFILTERLEN*sizeof(float));
+               memcpy(&tempbuff2[CB_HALFFILTERLEN], mem,
+                   lMem*sizeof(float));
+               memset(&tempbuff2[lMem+CB_HALFFILTERLEN], 0,
+                   (CB_HALFFILTERLEN+1)*sizeof(float));
+
+               k=index-base_size+cbveclen;
+               sFilt=lMem-k;
+               memInd=sFilt+1-CB_HALFFILTERLEN;
+
+               /* do filtering */
+               pos=cbvec;
+               memset(pos, 0, cbveclen*sizeof(float));
+               for (n=0; n<cbveclen; n++) {
+                   pp=&tempbuff2[memInd+n+CB_HALFFILTERLEN];
+                   pp1=&cbfiltersTbl[CB_FILTERLEN-1];
+                   for (j=0; j<CB_FILTERLEN; j++) {
+                       (*pos)+=(*pp++)*(*pp1--);
+                   }
+                   pos++;
+               }
+           }
+
+           /* interpolated vectors */
+
+           else {
+
+
+
+
+
+               float tempbuff2[CB_MEML+CB_FILTERLEN+1];
+
+               float *pos;
+               float *pp, *pp1;
+               int i;
+
+               memset(tempbuff2, 0,
+                   CB_HALFFILTERLEN*sizeof(float));
+               memcpy(&tempbuff2[CB_HALFFILTERLEN], mem,
+                   lMem*sizeof(float));
+               memset(&tempbuff2[lMem+CB_HALFFILTERLEN], 0,
+                   (CB_HALFFILTERLEN+1)*sizeof(float));
+
+               k=2*(index-base_size-
+                   (lMem-cbveclen+1))+cbveclen;
+               sFilt=lMem-k;
+               memInd=sFilt+1-CB_HALFFILTERLEN;
+
+               /* do filtering */
+               pos=&tmpbuf[sFilt];
+               memset(pos, 0, k*sizeof(float));
+               for (i=0; i<k; i++) {
+                   pp=&tempbuff2[memInd+i+CB_HALFFILTERLEN];
+                   pp1=&cbfiltersTbl[CB_FILTERLEN-1];
+                   for (j=0; j<CB_FILTERLEN; j++) {
+                       (*pos)+=(*pp++)*(*pp1--);
+                   }
+                   pos++;
+               }
+
+               ihigh=k/2;
+               ilow=ihigh-5;
+
+               /* Copy first noninterpolated part */
+
+               memcpy(cbvec, tmpbuf+lMem-k/2,
+                   ilow*sizeof(float));
+
+               /* interpolation */
+
+               alfa1=(float)0.2;
+               alfa=0.0;
+               for (j=ilow; j<ihigh; j++) {
+                   cbvec[j]=((float)1.0-alfa)*
+                       tmpbuf[lMem-k/2+j]+alfa*tmpbuf[lMem-k+j];
+                   alfa+=alfa1;
+               }
+
+
+
+
+
+
+               /* Copy second noninterpolated part */
+
+               memcpy(cbvec+ihigh, tmpbuf+lMem-k+ihigh,
+                   (cbveclen-ihigh)*sizeof(float));
+           }
+       }
+   }
+