mdct.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

// Based on xoreos' (I)RDFT code which is in turn
// Based upon the (I)MDCT code in FFmpeg
// Copyright (c) 2002 Fabrice Bellard


#ifndef COMMON_MDCT_H
#define COMMON_MDCT_H

#include "common/types.h"

namespace Common {

class FFT;

class MDCT {
public:
    MDCT(int bits, bool inverse, double scale);
    ~MDCT();

    void calcMDCT(float *output, const float *input);

    void calcIMDCT(float *output, const float *input);

private:
    int _bits;
    int _size;

    float *_tCos;
    float *_tSin;

    FFT *_fft;

    void calcHalfIMDCT(float *output, const float *input);
};

} // End of namespace Common

#endif // COMMON_MDCT_H