85 lines
2.9 KiB
Matlab
85 lines
2.9 KiB
Matlab
function blob8 = eq_iir_blob_pack(bs, endian)
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%% Pack equalizer struct to bytes
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%
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% blob8 = eq_iir_blob_pack(bs, endian)
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% bs - blob struct
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% endian - optional, use 'little' or 'big'. Defaults to little.
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%
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%%
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% Copyright (c) 2016, 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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if nargin < 2
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endian = 'little';
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end
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%% Shift values for little/big endian
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switch lower(endian)
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case 'little'
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sh = [0 -8 -16 -24];
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case 'big'
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sh = [-24 -16 -8 0];
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otherwise
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error('Unknown endiannes');
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end
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%% Pack as 8 bits, header
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nbytes_head = (3+bs.platform_max_channels)*4;
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nbytes_coef = length(bs.all_coefficients)*4;
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nbytes = nbytes_head + nbytes_coef;
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blob8 = uint8(zeros(1,nbytes));
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j = 1;
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blob8(j:j+3) = w2b(nbytes, sh); j=j+4;
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blob8(j:j+3) = w2b(bs.platform_max_channels, sh); j=j+4;
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blob8(j:j+3) = w2b(bs.number_of_responses_defined, sh); j=j+4;
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for i=1:bs.platform_max_channels
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blob8(j:j+3) = w2b(bs.assign_response(i), sh); j=j+4;
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end
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%% Pack coefficients
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for i=1:length(bs.all_coefficients)
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blob8(j:j+3) = w2b(bs.all_coefficients(i), sh); j=j+4;
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end
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fprintf('Blob size is %d bytes.\n', nbytes);
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end
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function bytes = w2b(word, sh)
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bytes = uint8(zeros(1,4));
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bytes(1) = bitand(bitshift(word, sh(1)), 255);
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bytes(2) = bitand(bitshift(word, sh(2)), 255);
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bytes(3) = bitand(bitshift(word, sh(3)), 255);
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bytes(4) = bitand(bitshift(word, sh(4)), 255);
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end
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