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40 lines
1.2 KiB
40 lines
1.2 KiB
/*
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* WMA compatible decoder
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* Copyright (c) 2002 The FFmpeg Project.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef WMA_MDCT_H
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#define WMA_MDCT_H 1
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#include "fft.h"
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typedef struct MDCTContext
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{
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int n; /* size of MDCT (i.e. number of input data * 2) */
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int nbits; /* n = 2^nbits */
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/* pre/post rotation tables */
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int32_t *tcos;
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int32_t *tsin;
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FFTContext fft;
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}
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MDCTContext;
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int ff_mdct_init(MDCTContext *s, int nbits, int inverse);
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void ff_imdct_calc(MDCTContext *s, int32_t *output, int32_t *input);
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int mdct_init_global(void);
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#endif
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