48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
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/*---------------------------------------------------------------------------*\
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FILE........: dct2.h
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AUTHOR......: Phil Ayres
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DATE CREATED: July 2017
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* DCT functions based on existing Codec 2 FFT
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*
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\*---------------------------------------------------------------------------*/
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/*
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Copyright David Rowe 2017
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DCT2_H
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#define DCT2_H
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#include "codec2_fft.h"
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#include "comp.h"
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#include "comp_prim.h"
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typedef codec2_fftr_cfg codec2_dct_cfg;
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void dct(codec2_dct_cfg cfg, const int N, float y[], float res[]);
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void dct2(codec2_dct_cfg cfg_m, codec2_dct_cfg cfg_n, const int M, const int N, float y[M][N], float res[M][N]);
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void idct(codec2_dct_cfg cfg, const int N, float a[N], float res[N]);
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void idct2(codec2_dct_cfg cfg_m, codec2_dct_cfg cfg_n, int M, int N, float y[M][N], float res[M][N]);
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codec2_dct_cfg dct_config(int P);
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codec2_dct_cfg idct_config(int P);
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void dct_cfg_free(codec2_dct_cfg cfg);
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#endif /* DCT2_H */
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