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mex/ssr_helper.m

 

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function out = ssr_helper(in, func)

 

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% Run the SSR block-wise on an input signal

 

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% 'func' is the SSR function, e.g. @ssr_nfc_hoa

 

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% 'func' must be initialized already

 

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block_size = func('block_size');

 

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out_channels = func('out_channels');

 

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in_channels = size(in, 2);

 

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% calculate (and discard) one block with empty input

 

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garbage = func('process', single(zeros(block_size, in_channels)));

 

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clear garbage

 

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% now all parameters are up-to-date

 

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signallength = size(in, 1);

 

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blocks = ceil(signallength/block_size);

 

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out = zeros(signallength, out_channels);

 

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for idx = 1:blocks-1

 

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    block_start = (idx-1) * block_size + 1;

 

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    block_end = block_start + block_size - 1;

 

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    inputblock = in(block_start:block_end, :);

 

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    out(block_start:block_end, :) = func('process', inputblock);

 

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end

 

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% TODO: handle last block!

 

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end

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