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/*
* This file is part of AtracDEnc.
*
* AtracDEnc is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* AtracDEnc 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with AtracDEnc; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <array>
#include <cstdint>
#include <config.h>
#include "lib/mdct/mdct.h"
namespace NAtracDEnc {
class TAt3pMDCT;
class TAt3pMIDCT;
class TAt3pMDCTWin {
friend class TAt3pMDCT;
friend class TAt3pMIDCT;
public:
enum EWinType {
SINE = 0,
STEEP = 1,
};
TAt3pMDCTWin() noexcept
: Flags(0)
{}
TAt3pMDCTWin(EWinType win) noexcept
: Flags(win == STEEP ? (uint16_t)-1 : 0)
{}
void SetSteepWin(size_t sb) noexcept {
Flags |= (1 << sb);
}
bool IsAllSine() const noexcept {
return Flags == 0;
}
bool IsAllSteep(uint8_t sbNum) const noexcept {
uint8_t mask = (1 << sbNum) - 1;
return (Flags & mask) == mask;
}
bool IsSbSteep(uint8_t sb) const noexcept {
return Flags & (1 << sb);
}
private:
uint16_t Flags;
};
class TAt3pMDCT {
public:
TAt3pMDCT();
using THistBuf = std::array<std::array<float, 256>, 16>;
using TPcmBandsData = std::array<const float*, 16>;
void Do(float specs[2048], const TPcmBandsData& bands, THistBuf& work, TAt3pMDCTWin winType);
private:
NMDCT::TMDCT<256> Mdct;
};
class TAt3pMIDCT {
public:
TAt3pMIDCT();
struct THistBuf {
std::array<std::array<float, 128>, 16> Buf;
TAt3pMDCTWin Win;
};
using TPcmBandsData = std::array<float*, 16>;
void Do(float specs[2048], TPcmBandsData& bands, THistBuf& work, TAt3pMDCTWin winType);
private:
NMDCT::TMIDCT<256> Midct;
};
}
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