mirror of https://github.com/thesofproject/sof.git
51 lines
2.1 KiB
Matlab
51 lines
2.1 KiB
Matlab
function qc = eq_coef_quant(c, bits, qf)
|
|
|
|
%%
|
|
% Copyright (c) 2016, Intel Corporation
|
|
% All rights reserved.
|
|
%
|
|
% Redistribution and use in source and binary forms, with or without
|
|
% modification, are permitted provided that the following conditions are met:
|
|
% * Redistributions of source code must retain the above copyright
|
|
% notice, this list of conditions and the following disclaimer.
|
|
% * Redistributions in binary form must reproduce the above copyright
|
|
% notice, this list of conditions and the following disclaimer in the
|
|
% documentation and/or other materials provided with the distribution.
|
|
% * Neither the name of the Intel Corporation nor the
|
|
% names of its contributors may be used to endorse or promote products
|
|
% derived from this software without specific prior written permission.
|
|
%
|
|
% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
% POSSIBILITY OF SUCH DAMAGE.
|
|
%
|
|
% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
|
|
%
|
|
|
|
scale = 2^qf;
|
|
cmax = 2^(bits-1)-1;
|
|
cmin = -2^(bits-1);
|
|
qc = int64(round(c*scale));
|
|
idx = find(qc > cmax);
|
|
if ~isempty(idx)
|
|
fprintf('Warning: Max. value of Q format is exceeded: %d (%d)\n', ...
|
|
qc(idx(1)), cmax);
|
|
qc(idx) = cmax;
|
|
end
|
|
idx = find(qc < cmin);
|
|
if ~isempty(idx)
|
|
fprintf('Warning: Min. value of Q format is exceeded: %d (%d)\n', ...
|
|
qc(idx(1)), cmin);
|
|
qc(idx) = cmin;
|
|
end
|
|
|
|
end
|