/src/opus/silk/float/bwexpander_FLP.c
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27 | | |
28 | | #ifdef HAVE_CONFIG_H |
29 | | #include "config.h" |
30 | | #endif |
31 | | |
32 | | #include "SigProc_FLP.h" |
33 | | |
34 | | /* Chirp (bw expand) LP AR filter */ |
35 | | void silk_bwexpander_FLP( |
36 | | silk_float *ar, /* I/O AR filter to be expanded (without leading 1) */ |
37 | | const opus_int d, /* I length of ar */ |
38 | | const silk_float chirp /* I chirp factor (typically in range (0..1) ) */ |
39 | | ) |
40 | 0 | { |
41 | 0 | opus_int i; |
42 | 0 | silk_float cfac = chirp; |
43 | |
|
44 | 0 | for( i = 0; i < d - 1; i++ ) { |
45 | 0 | ar[ i ] *= cfac; |
46 | 0 | cfac *= chirp; |
47 | 0 | } |
48 | 0 | ar[ d - 1 ] *= cfac; |
49 | 0 | } |