mirror of
https://github.com/libretro/scummvm.git
synced 2025-02-10 12:55:24 +00:00
ec24687ce4
Adding @defgroup and @ingroup doxygen tags into all headers in the common folder that contain doxygen blocks. This improves the structure, readability, and findability of information in the resulting output. This commit targets purely structure and does not deal with the content of the currently existing doxygen documentation.
91 lines
2.0 KiB
C++
91 lines
2.0 KiB
C++
/* 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 2
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
|
|
// Based on eos' (I)RDFT code which is in turn
|
|
// Based upon the (I)DCT code in FFmpeg
|
|
// Copyright (c) 2009 Peter Ross <pross@xvid.org>
|
|
// Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
|
|
// Copyright (c) 2010 Vitor Sessak
|
|
|
|
#ifndef COMMON_DCT_H
|
|
#define COMMON_DCT_H
|
|
|
|
#include "common/scummsys.h"
|
|
#include "common/math.h"
|
|
#include "common/rdft.h"
|
|
|
|
#include "common/cosinetables.h"
|
|
|
|
namespace Common {
|
|
|
|
/**
|
|
* @defgroup common_dct Discrete Cosine Transforms
|
|
* @ingroup common
|
|
*
|
|
* @brief Discrete Cosine Transforms.
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* (Inverse) Discrete Cosine Transforms.
|
|
*
|
|
* Used in engines:
|
|
* - scumm
|
|
*/
|
|
class DCT {
|
|
public:
|
|
enum TransformType {
|
|
DCT_II,
|
|
DCT_III,
|
|
DCT_I,
|
|
DST_I
|
|
};
|
|
|
|
DCT(int bits, TransformType trans);
|
|
~DCT();
|
|
|
|
void calc(float *data);
|
|
|
|
private:
|
|
int _bits;
|
|
TransformType _trans;
|
|
|
|
CosineTable _cos;
|
|
const float *_tCos;
|
|
|
|
float *_csc2;
|
|
|
|
RDFT *_rdft;
|
|
|
|
void calcDCTI (float *data);
|
|
void calcDCTII (float *data);
|
|
void calcDCTIII(float *data);
|
|
void calcDSTI (float *data);
|
|
};
|
|
|
|
/** @} */
|
|
|
|
} // End of namespace Common
|
|
|
|
#endif // COMMON_DCT_H
|