mirror of https://github.com/ecmwf/eccodes.git
33 lines
1.3 KiB
Modula-2
33 lines
1.3 KiB
Modula-2
# Copyright 2005-2018 ECMWF.
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#
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# This software is licensed under the terms of the Apache Licence Version 2.0
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# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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#
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# In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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# virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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#
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# TEMPLATE 5.42, Grid point and spectral data - CCSDS recommended lossless compression
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include "grib2/template.5.packing.def";
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include "grib2/template.5.original_values.def";
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unsigned[1] ccsdsFlags : dump;
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alias ccsdsCompressionOptionsMask=ccsdsFlags;
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flagbit AEC_DATA_SIGNED_OPTION_MASK(ccsdsFlags,0) = 0;
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# AEC_DATA_3BYTE_OPTION_MASK was switched on in order to allow data stored
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# with 17 <=bitsPerValue<= 24 to be stored in 3 rather than 4 bytes.
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# This eliminates discretization errors that were occuring when it was off.
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flagbit AEC_DATA_3BYTE_OPTION_MASK(ccsdsFlags,1) = 1;
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flagbit AEC_DATA_MSB_OPTION_MASK(ccsdsFlags,2) = 1;
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flagbit AEC_DATA_PREPROCESS_OPTION_MASK(ccsdsFlags,3) = 1;
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flagbit AEC_RESTRICTED_OPTION_MASK(ccsdsFlags,4) = 0;
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flagbit AEC_PAD_RSI_OPTION_MASK(ccsdsFlags,5) = 0;
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unsigned[1] ccsdsBlockSize = 32 : dump;
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unsigned[2] ccsdsRsi = 128 : dump;
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alias referenceSampleInterval=ccsdsRsi;
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