41 lines
1.0 KiB
Matlab
41 lines
1.0 KiB
Matlab
function output = zlibencode(input)
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import jsonlab.*
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%ZLIBENCODE Compress input bytes with ZLIB.
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%
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% output = zlibencode(input)
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%
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% The function takes a char, int8, or uint8 array INPUT and returns
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% compressed bytes OUTPUT as a uint8 array. Note that the compression
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% doesn't preserve input dimensions. JAVA must be enabled to use the
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% function.
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%
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% See also zlibdecode typecast
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%
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% Copyright (c) 2012, Kota Yamaguchi
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% URL: https://www.mathworks.com/matlabcentral/fileexchange/39526-byte-encoding-utilities
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% License : BSD, see LICENSE_*.txt
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%
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if(nargin==0)
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error('you must provide at least 1 input');
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end
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if(exist('zmat')==3)
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output=zmat(input,1,'zlib');
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return;
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end
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error(javachk('jvm'));
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if ischar(input), input = uint8(input); end
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if ~isa(input, 'int8') && ~isa(input, 'uint8')
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error('Input must be either char, int8 or uint8.');
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end
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buffer = java.io.ByteArrayOutputStream();
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zlib = java.util.zip.DeflaterOutputStream(buffer);
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zlib.write(input, 0, numel(input));
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zlib.close();
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output = typecast(buffer.toByteArray(), 'uint8')';
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end
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