| 1 | //#---------------------------------------------------------------------------
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| 2 | //# FITSreader.cc: ATNF single-dish FITS reader.
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| 3 | //#---------------------------------------------------------------------------
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| 4 | //# livedata - processing pipeline for single-dish, multibeam spectral data.
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| 5 | //# Copyright (C) 2000-2009, Australia Telescope National Facility, CSIRO
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| 6 | //#
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| 7 | //# This file is part of livedata.
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| 8 | //#
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| 9 | //# livedata is free software: you can redistribute it and/or modify it under
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| 10 | //# the terms of the GNU General Public License as published by the Free
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| 11 | //# Software Foundation, either version 3 of the License, or (at your option)
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| 12 | //# any later version.
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| 13 | //#
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| 14 | //# livedata is distributed in the hope that it will be useful, but WITHOUT
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| 15 | //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 16 | //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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| 17 | //# more details.
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| 18 | //#
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| 19 | //# You should have received a copy of the GNU General Public License along
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| 20 | //# with livedata. If not, see <http://www.gnu.org/licenses/>.
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| 21 | //#
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| 22 | //# Correspondence concerning livedata may be directed to:
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| 23 | //# Internet email: mcalabre@atnf.csiro.au
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| 24 | //# Postal address: Dr. Mark Calabretta
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| 25 | //# Australia Telescope National Facility, CSIRO
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| 26 | //# PO Box 76
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| 27 | //# Epping NSW 1710
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| 28 | //# AUSTRALIA
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| 29 | //#
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| 30 | //# http://www.atnf.csiro.au/computing/software/livedata.html
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| 31 | //# $Id: FITSreader.cc,v 19.4 2009-09-29 07:33:38 cal103 Exp $
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| 32 | //#---------------------------------------------------------------------------
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| 33 | //# The FITSreader class is an abstract base class for the Parkes Multibeam
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| 34 | //# RPFITS and SDFITS readers.
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| 35 | //#
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| 36 | //# Original: 2000/07/28 Mark Calabretta
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| 37 | //#---------------------------------------------------------------------------
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| 38 |
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| 39 | #include <atnf/PKSIO/FITSreader.h>
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| 40 | #include <algorithm>
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| 41 | #include <cstdlib>
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| 42 |
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| 43 | using namespace std;
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| 44 |
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| 45 | //--------------------------------------------------------- FITSreader::select
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| 46 |
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| 47 | // Set data selection criteria. Note that cBeams and cIFs, the addresses of
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| 48 | // int arrays, are returned by open() thereby allowing their elements to be
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| 49 | // modified directly elsewhere (specifically by PKSFITSreader::select()).
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| 50 |
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| 51 | int FITSreader::select(
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| 52 | const int startChan[],
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| 53 | const int endChan[],
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| 54 | const int refChan[],
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| 55 | const int getSpectra,
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| 56 | const int getXPol,
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| 57 | const int getFeedPos,
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| 58 | const int /* getPointing */,
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| 59 | const int coordSys)
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| 60 | {
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| 61 | int maxNChan = 0;
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| 62 |
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| 63 | for (int iIF = 0; iIF < cNIF; iIF++) {
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| 64 | if (!cIFs[iIF]) {
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| 65 | continue;
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| 66 | }
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| 67 |
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| 68 | cStartChan[iIF] = startChan[iIF];
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| 69 | cEndChan[iIF] = endChan[iIF];
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| 70 | cRefChan[iIF] = refChan[iIF];
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| 71 |
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| 72 | if (cStartChan[iIF] <= 0) {
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| 73 | cStartChan[iIF] += cNChan[iIF];
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| 74 | } else if (cStartChan[iIF] > cNChan[iIF]) {
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| 75 | cStartChan[iIF] = cNChan[iIF];
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| 76 | }
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| 77 |
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| 78 | if (cEndChan[iIF] <= 0) {
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| 79 | cEndChan[iIF] += cNChan[iIF];
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| 80 | } else if (cEndChan[iIF] > cNChan[iIF]) {
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| 81 | cEndChan[iIF] = cNChan[iIF];
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| 82 | }
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| 83 |
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| 84 | maxNChan = max(maxNChan, abs(cEndChan[iIF] - cStartChan[iIF]) + 1);
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| 85 | }
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| 86 |
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| 87 | cGetSpectra = getSpectra && cHaveSpectra;
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| 88 | cGetXPol = getXPol && cGetXPol;
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| 89 | cGetFeedPos = getFeedPos;
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| 90 | cCoordSys = coordSys;
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| 91 |
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| 92 |
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| 93 | return maxNChan;
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| 94 | }
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