diff options
Diffstat (limited to 'codecs/ilbc/helpfun.h')
| -rwxr-xr-x | codecs/ilbc/helpfun.h | 194 |
1 files changed, 101 insertions, 93 deletions
diff --git a/codecs/ilbc/helpfun.h b/codecs/ilbc/helpfun.h index 01edc876b..291a761d9 100755 --- a/codecs/ilbc/helpfun.h +++ b/codecs/ilbc/helpfun.h @@ -1,93 +1,101 @@ - -/****************************************************************** - - iLBC Speech Coder ANSI-C Source Code - - helpfun.h - - Copyright (c) 2001, - Global IP Sound AB. - All rights reserved. - -******************************************************************/ - -#ifndef __iLBC_HELPFUN_H -#define __iLBC_HELPFUN_H - -void autocorr( - float *r, /* (o) autocorrelation vector */ - const float *x, /* (i) data vector */ - int N, /* (i) length of data vector */ - int order /* largest lag for calculated autocorrelations */ -); - -void lbc_window( - float *z, /* (o) the windowed data */ - const float *x, /* (i) the original data vector */ - const float *y, /* (i) the window */ - int N /* (i) length of all vectors */ -); - -void levdurb( - float *a, /* (o) lpc coefficient vector starting - with 1.0 */ - float *k, /* (o) reflection coefficients */ - float *r, /* (i) autocorrelation vector */ - int order /* (i) order of lpc filter */ -); - -void interpolate( - float *out, /* (o) the interpolated vector */ - float *in1, /* (i) the first vector for the interpolation */ - float *in2, /* (i) the second vector for the interpolation */ - float coef, /* (i) interpolation weights */ - int length /* (i) length of all vectors */ -); - -void bwexpand( - float *out, /* (o) the bandwidth expanded lpc coefficients */ - float *in, /* (i) the lpc coefficients before bandwidth - expansion */ - float coef, /* (i) the bandwidth expansion factor */ - int length /* (i) the length of lpc coefficient vectors */ -); - -void vq( - float *Xq, /* (o) the quantized vector */ - int *index, /* (o) the quantization index */ - const float *CB,/* (i) the vector quantization codebook */ - float *X, /* (i) the vector to quantize */ - int n_cb, /* (i) the number of vectors in the codebook */ - int dim /* (i) the dimension of all vectors */ -); - -void SplitVQ( - float *qX, /* (o) the quantized vector */ - int *index, /* (o) a vector of indexes for all vector - codebooks in the split */ - float *X, /* (i) the vector to quantize */ - const float *CB,/* (i) the quantizer codebook */ - int nsplit, /* the number of vector splits */ - const int *dim, /* the dimension of X and qX */ - const int *cbsize /* the number of vectors in the codebook */ -); - - -void sort_sq( - float *xq, /* (o) the quantized value */ - int *index, /* (o) the quantization index */ - float x, /* (i) the value to quantize */ - const float *cb,/* (i) the quantization codebook */ - int cb_size /* (i) the size of the quantization codebook */ -); - -int LSF_check( /* (o) 1 for stable lsf vectors and 0 for - nonstable ones */ - float *lsf, /* (i) a table of lsf vectors */ - int dim, /* (i) the dimension of each lsf vector */ - int NoAn /* (i) the number of lsf vectors in the table */ -); - -#endif - - + +/****************************************************************** + + iLBC Speech Coder ANSI-C Source Code + + helpfun.h + + Copyright (C) The Internet Society (2004). + All Rights Reserved. + +******************************************************************/ + +#ifndef __iLBC_HELPFUN_H +#define __iLBC_HELPFUN_H + +void autocorr( + float *r, /* (o) autocorrelation vector */ + const float *x, /* (i) data vector */ + int N, /* (i) length of data vector */ + int order /* largest lag for calculated + autocorrelations */ +); + +void window( + float *z, /* (o) the windowed data */ + const float *x, /* (i) the original data vector */ + const float *y, /* (i) the window */ + int N /* (i) length of all vectors */ +); + + + +void levdurb( + float *a, /* (o) lpc coefficient vector starting + with 1.0 */ + float *k, /* (o) reflection coefficients */ + float *r, /* (i) autocorrelation vector */ + int order /* (i) order of lpc filter */ +); + +void interpolate( + float *out, /* (o) the interpolated vector */ + float *in1, /* (i) the first vector for the + interpolation */ + float *in2, /* (i) the second vector for the + interpolation */ + float coef, /* (i) interpolation weights */ + int length /* (i) length of all vectors */ +); + +void bwexpand( + float *out, /* (o) the bandwidth expanded lpc + coefficients */ + float *in, /* (i) the lpc coefficients before bandwidth + expansion */ + float coef, /* (i) the bandwidth expansion factor */ + int length /* (i) the length of lpc coefficient vectors */ +); + +void vq( + float *Xq, /* (o) the quantized vector */ + int *index, /* (o) the quantization index */ + const float *CB,/* (i) the vector quantization codebook */ + float *X, /* (i) the vector to quantize */ + int n_cb, /* (i) the number of vectors in the codebook */ + int dim /* (i) the dimension of all vectors */ +); + +void SplitVQ( + float *qX, /* (o) the quantized vector */ + int *index, /* (o) a vector of indexes for all vector + codebooks in the split */ + float *X, /* (i) the vector to quantize */ + const float *CB,/* (i) the quantizer codebook */ + int nsplit, /* the number of vector splits */ + const int *dim, /* the dimension of X and qX */ + const int *cbsize /* the number of vectors in the codebook */ +); + + +void sort_sq( + float *xq, /* (o) the quantized value */ + int *index, /* (o) the quantization index */ + float x, /* (i) the value to quantize */ + const float *cb,/* (i) the quantization codebook */ + + + int cb_size /* (i) the size of the quantization codebook */ +); + +int LSF_check( /* (o) 1 for stable lsf vectors and 0 for + nonstable ones */ + float *lsf, /* (i) a table of lsf vectors */ + int dim, /* (i) the dimension of each lsf vector */ + int NoAn /* (i) the number of lsf vectors in the + table */ +); + +#endif + + |