mirror of https://github.com/thesofproject/sof.git
82 lines
2.1 KiB
Matlab
82 lines
2.1 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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% SPDX-License-Identifier: BSD-3-Clause
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%
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% Copyright(c) 2016 Intel Corporation. All rights reserved.
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%
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% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
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if nargin < 2
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endian = 'little';
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end
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%% Channels count and assign vector lengths must be the same
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if bs.channels_in_config ~= length( bs.assign_response)
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bs
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error("Channels # and response assign length must match");
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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 = (7+bs.channels_in_config)*4;
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nbytes_coef = length(bs.all_coefficients)*4;
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nbytes_data = nbytes_head + nbytes_coef;
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%% Get ABI information
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[abi_bytes, nbytes_abi] = eq_get_abi(nbytes_data);
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%% Initialize correct size uint8 array
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nbytes = nbytes_abi + nbytes_data;
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blob8 = uint8(zeros(1,nbytes));
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%% Insert ABI header
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blob8(1:nbytes_abi) = abi_bytes;
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j = nbytes_abi + 1;
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%% Component data
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blob8(j:j+3) = w2b(nbytes_data, sh); j=j+4;
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blob8(j:j+3) = w2b(bs.channels_in_config, 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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blob8(j:j+3) = w2b(0, sh);j=j+4; % Reserved
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blob8(j:j+3) = w2b(0, sh);j=j+4; % Reserved
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blob8(j:j+3) = w2b(0, sh);j=j+4; % Reserved
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blob8(j:j+3) = w2b(0, sh);j=j+4; % Reserved
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for i=1:bs.channels_in_config
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blob8(j:j+3) = w2b(int32(bs.assign_response(i)), sh);
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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(int32(bs.all_coefficients(i)), sh);
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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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