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Diffstat (limited to 'codecs/ilbc/StateConstructW.c')
-rw-r--r-- | codecs/ilbc/StateConstructW.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/codecs/ilbc/StateConstructW.c b/codecs/ilbc/StateConstructW.c deleted file mode 100644 index e48fe035d..000000000 --- a/codecs/ilbc/StateConstructW.c +++ /dev/null @@ -1,76 +0,0 @@ - -/****************************************************************** - - - - iLBC Speech Coder ANSI-C Source Code - - StateConstructW.c - - Copyright (C) The Internet Society (2004). - All Rights Reserved. - -******************************************************************/ - -#include <math.h> -#include <string.h> - -#include "iLBC_define.h" -#include "StateConstructW.h" -#include "constants.h" -#include "filter.h" - -/*----------------------------------------------------------------* - * decoding of the start state - *---------------------------------------------------------------*/ - -void StateConstructW( - int idxForMax, /* (i) 6-bit index for the quantization of - max amplitude */ - int *idxVec, /* (i) vector of quantization indexes */ - float *syntDenum, /* (i) synthesis filter denumerator */ - float *out, /* (o) the decoded state vector */ - int len /* (i) length of a state vector */ -){ - float maxVal, tmpbuf[LPC_FILTERORDER+2*STATE_LEN], *tmp, - numerator[LPC_FILTERORDER+1]; - float foutbuf[LPC_FILTERORDER+2*STATE_LEN], *fout; - int k,tmpi; - - /* decoding of the maximum value */ - - maxVal = state_frgqTbl[idxForMax]; - maxVal = (float)pow(10,maxVal)/(float)4.5; - - /* initialization of buffers and coefficients */ - - memset(tmpbuf, 0, LPC_FILTERORDER*sizeof(float)); - memset(foutbuf, 0, LPC_FILTERORDER*sizeof(float)); - for (k=0; k<LPC_FILTERORDER; k++) { - numerator[k]=syntDenum[LPC_FILTERORDER-k]; - } - numerator[LPC_FILTERORDER]=syntDenum[0]; - tmp = &tmpbuf[LPC_FILTERORDER]; - fout = &foutbuf[LPC_FILTERORDER]; - - /* decoding of the sample values */ - - for (k=0; k<len; k++) { - tmpi = len-1-k; - /* maxVal = 1/scal */ - - - tmp[k] = maxVal*state_sq3Tbl[idxVec[tmpi]]; - } - - /* circular convolution with all-pass filter */ - - memset(tmp+len, 0, len*sizeof(float)); - ZeroPoleFilter(tmp, numerator, syntDenum, 2*len, - LPC_FILTERORDER, fout); - for (k=0;k<len;k++) { - out[k] = fout[len-1-k]+fout[2*len-1-k]; - } -} - - |