88 lines
2.7 KiB
Matlab
88 lines
2.7 KiB
Matlab
function [x, nx] = load_test_output(test)
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%% [x, n] = load_test_output(t)
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%
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% Input
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% t.fn_out - file name to load
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% t.bits_out - word length of data
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% t.fmt - file format 'raw' or 'txt
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% t.ch - channel to extract
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% t.nch - number of channels in (interleaved) data
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%
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% Output
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% x - samples
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% n - number of samples
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%
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%%
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% Copyright (c) 2017, Intel Corporation
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% All rights reserved.
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%
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% Redistribution and use in source and binary forms, with or without
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% modification, are permitted provided that the following conditions are met:
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% * Redistributions of source code must retain the above copyright
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% notice, this list of conditions and the following disclaimer.
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% * Redistributions in binary form must reproduce the above copyright
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% notice, this list of conditions and the following disclaimer in the
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% documentation and/or other materials provided with the distribution.
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% * Neither the name of the Intel Corporation nor the
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% names of its contributors may be used to endorse or promote products
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% derived from this software without specific prior written permission.
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%
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% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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% POSSIBILITY OF SUCH DAMAGE.
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%
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% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
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%
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%% Integer type for binary files
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switch test.bits_out
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case 16
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bfmt = 'int16';
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case 24
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bfmt = 'int32';
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case 32
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bfmt = 'int32';
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otherwise
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error('Bits_out must be 16, 24, or 32.');
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end
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%% Check that output file exists
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if exist(test.fn_out)
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fprintf('Reading output data file %s...\n', test.fn_out);
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switch lower(test.fmt)
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case 'txt'
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out = load(test.fn_out);
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case 'raw'
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fh = fopen(test.fn_out, 'r');
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out = fread(fh, inf, bfmt);
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fclose(fh);
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otherwise
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error('Fmt must be raw or txt.');
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end
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else
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out = [];
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end
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%% Exctract channels to measure
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scale = 1/2^(test.bits_out-1);
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lout = length(out);
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nx = floor(lout/test.nch);
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x = zeros(nx,length(test.ch));
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j = 1;
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for ch = test.ch
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x(:,j) = out(ch:test.nch:end)*scale;
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j = j + 1;
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end
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end
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