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| 2 | /* file RFUSRDEF.H |
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| 3 | * ========== |
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| 4 | * |
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| 5 | * version 4, 22-May-2006 |
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| 6 | * |
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| 7 | * prototypes of module RECFILTR.C |
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| 8 | * K. Stammler, 22-MAY-91 |
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| 9 | */ |
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| 10 | |
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| 11 | |
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| 12 | /* |
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| 13 | * |
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| 14 | * SeismicHandler, seismic analysis software |
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| 15 | * Copyright (C) 1996, Klaus Stammler, Federal Institute for Geosciences |
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| 16 | * and Natural Resources (BGR), Germany |
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| 17 | * |
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| 18 | * This program is free software; you can redistribute it and/or modify |
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| 19 | * it under the terms of the GNU General Public License as published by |
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| 20 | * the Free Software Foundation; either version 2 of the License, or |
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| 21 | * (at your option) any later version. |
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| 22 | * |
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| 23 | * This program is distributed in the hope that it will be useful, |
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| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 26 | * GNU General Public License for more details. |
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| 27 | * |
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| 28 | * You should have received a copy of the GNU General Public License |
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| 29 | * along with this program; if not, write to the Free Software |
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| 30 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 31 | * |
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| 32 | */ |
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| 33 | |
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| 34 | |
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| 35 | #ifndef __RFUSRDEF |
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| 36 | #define __RFUSRDEF |
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| 37 | |
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| 38 | #ifndef __SHCONST |
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| 39 | #include "shconst.h" |
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| 40 | #endif |
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| 41 | |
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| 42 | typedef struct { |
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| 43 | BOOLEAN use_lpc; /* use lin pred coding */ |
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| 44 | int pred_length; /* prediction length in samples */ |
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| 45 | int pred_order; /* prediction order */ |
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| 46 | int src_length; /* length of source array */ |
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| 47 | BOOLEAN demean; /* remove mean value on each stage */ |
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| 48 | } RFT_STARTUP; |
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| 49 | |
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| 50 | #define RFC_MAXFILTER 8 |
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| 51 | /* maximum number of filters */ |
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| 52 | |
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| 53 | /*------------------------------------------------------------------------*/ |
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| 54 | |
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| 55 | |
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| 56 | void rf_filter_input( int list_lth, char *flt_list[], int pos_list[], |
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| 57 | int *status ); |
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| 58 | |
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| 59 | /* reads one or more filters into memory |
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| 60 | * |
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| 61 | * paramters of routine |
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| 62 | * int list_lth; input; number of filters to read |
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| 63 | * char *flt_list[]; input; list of filter names |
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| 64 | * int pos_list[]; input; positions of filters in files |
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| 65 | * int *status; output; return status |
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| 66 | */ |
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| 67 | |
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| 68 | |
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| 69 | /*------------------------------------------------------------------------*/ |
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| 70 | |
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| 71 | |
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| 72 | void rf_filter( SAMPLE src[], long trclth, REAL dt, RFT_STARTUP *lpc, |
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| 73 | SAMPLE dst[], STATUS *status ); |
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| 74 | |
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| 75 | /* filters the seismogram "src" from index "start" to index "end" |
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| 76 | * with all the filters in rfv_fct. The result is returned in "dst" |
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| 77 | * |
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| 78 | * parameters of routine |
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| 79 | * SAMPLE src[]; input; input signal to be filtered |
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| 80 | * long trclth; input length of trace in samples |
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| 81 | * REAL dt; input; sample distance in sec |
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| 82 | * RFT_STARTUP *lpc; input; use special startup routine |
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| 83 | * SAMPLE dst[]; output; output signal |
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| 84 | * STATUS *status; output; return status |
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| 85 | */ |
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| 86 | |
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| 87 | |
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| 88 | /*------------------------------------------------------------------------*/ |
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| 89 | |
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| 90 | #endif /* __RFUSRDEF */ |
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