diff options
Diffstat (limited to 'codecs/ilbc/getCBvec.c')
-rw-r--r-- | codecs/ilbc/getCBvec.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/codecs/ilbc/getCBvec.c b/codecs/ilbc/getCBvec.c deleted file mode 100644 index 081abb216..000000000 --- a/codecs/ilbc/getCBvec.c +++ /dev/null @@ -1,181 +0,0 @@ - -/****************************************************************** - - iLBC Speech Coder ANSI-C Source Code - - getCBvec.c - - Copyright (C) The Internet Society (2004). - All Rights Reserved. - -******************************************************************/ - -#include "iLBC_define.h" -#include "getCBvec.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 codebbok 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)); - } - } -} - - |