blob: a5f809be38e5af9b3a23f72eb6557fc9b3ba4774
| 1 | /*****************************************************************************/ |
| 2 | /* BroadVoice(R)32 (BV32) Floating-Point ANSI-C Source Code */ |
| 3 | /* Revision Date: October 5, 2012 */ |
| 4 | /* Version 1.2 */ |
| 5 | /*****************************************************************************/ |
| 6 | |
| 7 | |
| 8 | /***************************************************************************** |
| 9 | bvcommon.h : Common #defines and prototypes |
| 10 | |
| 11 | $Log$ |
| 12 | ******************************************************************************/ |
| 13 | |
| 14 | #ifndef BVCOMMON_H |
| 15 | #define BVCOMMON_H |
| 16 | |
| 17 | /* Function Prototypes */ |
| 18 | |
| 19 | |
| 20 | void pp3dec( |
| 21 | short idx, |
| 22 | Float *b); |
| 23 | |
| 24 | void apfilter( |
| 25 | Float *a, /* (i) a[m+1] prediction coefficients (m=10) */ |
| 26 | int m, /* (i) LPC order */ |
| 27 | Float *x, /* (i) input signal */ |
| 28 | Float *y, /* (o) output signal */ |
| 29 | int lg, /* (i) size of filtering */ |
| 30 | Float *mem, /* (i/o) input memory */ |
| 31 | short update);/* (i) flag for memory update */ |
| 32 | |
| 33 | void azfilter( |
| 34 | Float *a, /* (i) prediction coefficients */ |
| 35 | int m, /* (i) LPC order */ |
| 36 | Float *x, /* (i) input signal vector */ |
| 37 | Float *y, /* (o) output signal vector */ |
| 38 | int lg, /* (i) size of filtering */ |
| 39 | Float *mem, /* (i/o) filter memory before filtering */ |
| 40 | short update); /* (i) flag for memory update */ |
| 41 | |
| 42 | void Autocor( |
| 43 | Float *r, /* (o) : Autocorrelations */ |
| 44 | Float *x, /* (i) : Input signal */ |
| 45 | Float *window, /* (i) : LPC Analysis window */ |
| 46 | int l_window,/* (i) : window length */ |
| 47 | int m); /* (i) : LPC order */ |
| 48 | |
| 49 | void Levinson( |
| 50 | Float *r, /* (i): autocorrelation coefficients */ |
| 51 | Float *a, /* (o): LPC coefficients */ |
| 52 | Float *old_a, /* (i/o): LPC coefficients of previous frame */ |
| 53 | int m); /* (i): LPC order */ |
| 54 | |
| 55 | void a2lsp( |
| 56 | Float pc[], /* (i) input the np+1 predictor coeff. */ |
| 57 | Float lsp[], /* (o) line spectral pairs */ |
| 58 | Float old_lsp[]); /* (i/o) old lsp[] (in case not found 10 roots) */ |
| 59 | |
| 60 | void lsp2a( |
| 61 | Float *lsp, /* (i) LSP vector */ |
| 62 | Float *a); /* (o) LPC coefficients */ |
| 63 | |
| 64 | void stblz_lsp(Float *lsp, int order); |
| 65 | int stblchck(Float *x, int vdim); |
| 66 | |
| 67 | /* LPC to LSP Conversion */ |
| 68 | extern Float grid[]; |
| 69 | |
| 70 | /* LPC bandwidth expansion */ |
| 71 | extern Float bwel[]; |
| 72 | |
| 73 | /* LPC WEIGHTING FILTER */ |
| 74 | extern Float STWAL[]; |
| 75 | |
| 76 | /* ----- Basic Codec Parameters ----- */ |
| 77 | #define LPCO 8 /* LPC Order */ |
| 78 | #define Ngrd 60 /* LPC to LSP Conversion */ |
| 79 | |
| 80 | #define LSPMIN 0.00150f /* minimum lsp frequency, 6/12 Hz for BV16/BV32 */ |
| 81 | #define LSPMAX 0.99775f /* maximum lsp frequency, 3991/7982 Hz for BV16/BV32 */ |
| 82 | #define DLSPMIN 0.01250f /* minimum lsp spacing, 50/100 Hz for BV16/BV32 */ |
| 83 | #define STBLDIM 3 /* dimension of stability enforcement */ |
| 84 | |
| 85 | extern Float pp9cb[]; |
| 86 | |
| 87 | #endif /* BVCOMMON_H */ |
| 88 | |
| 89 |