Really add the iLBC files into SVN now (duh!).
git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@638 74dad513-b988-da41-8d7b-12977e46ad98
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));
+ }
+ }
+ }
+