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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 <cstdint>
#include <array>
#include <map>
#include <math.h>
#include "config.h"
namespace NBitStream {
class TBitStream;
}
namespace NAtracDEnc {
namespace NAtrac1 {
class TAtrac1EncodeSettings {
public:
enum class EWindowMode {
EWM_NOTRANSIENT,
EWM_AUTO
};
private:
const uint32_t BfuIdxConst = 0;
const bool FastBfuNumSearch = false;
EWindowMode WindowMode = EWindowMode::EWM_AUTO;
const uint32_t WindowMask = 0;
public:
TAtrac1EncodeSettings()
{}
TAtrac1EncodeSettings(uint32_t bfuIdxConst, bool fastBfuNumSearch, EWindowMode windowMode, uint32_t windowMask)
: BfuIdxConst(bfuIdxConst)
, FastBfuNumSearch(fastBfuNumSearch)
, WindowMode(windowMode)
, WindowMask(windowMask)
{}
uint32_t GetBfuIdxConst() const { return BfuIdxConst; }
bool GetFastBfuNumSearch() const { return FastBfuNumSearch; }
EWindowMode GetWindowMode() const {return WindowMode; }
uint32_t GetWindowMask() const {return WindowMask; }
};
class TAtrac1Data {
public:
class TBlockSizeMod {
static std::array<int, 3> Parse(NBitStream::TBitStream* stream);
static std::array<int, 3> Create(bool lowShort, bool midShort, bool hiShort) {
std::array<int, 3> tmp;
tmp[0] = lowShort ? 2 : 0;
tmp[1] = midShort ? 2 : 0;
tmp[2] = hiShort ? 3 : 0;
return tmp;
}
public:
bool ShortWin(uint8_t band) const noexcept {
return LogCount[band];
}
TBlockSizeMod(NBitStream::TBitStream* stream)
: LogCount(Parse(stream))
{}
TBlockSizeMod(bool lowShort, bool midShort, bool hiShort)
: LogCount(Create(lowShort, midShort, hiShort))
{}
TBlockSizeMod()
: LogCount({{0, 0, 0}})
{}
std::array<int, 3> LogCount;
};
static constexpr uint8_t MaxBfus = 52;
static constexpr uint8_t NumQMF = 3;
static constexpr uint32_t SpecsPerBlock[MaxBfus] = {
8, 8, 8, 8, 4, 4, 4, 4, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, // low band
6, 6, 6, 6, 7, 7, 7, 7, 9, 9, 9, 9, 10, 10, 10, 10, // middle band
12, 12, 12, 12, 12, 12, 12, 12, 20, 20, 20, 20, 20, 20, 20, 20 // high band
};
static constexpr uint32_t BlocksPerBand[NumQMF + 1] = {0, 20, 36, 52};
static constexpr uint32_t SpecsStartLong[MaxBfus] = {
0, 8, 16, 24, 32, 36, 40, 44, 48, 56, 64, 72, 80, 86, 92, 98, 104, 110, 116, 122,
128, 134, 140, 146, 152, 159, 166, 173, 180, 189, 198, 207, 216, 226, 236, 246,
256, 268, 280, 292, 304, 316, 328, 340, 352, 372, 392, 412, 432, 452, 472, 492,
};
static constexpr uint32_t SpecsStartShort[MaxBfus] = {
0, 32, 64, 96, 8, 40, 72, 104, 12, 44, 76, 108, 20, 52, 84, 116, 26, 58, 90, 122,
128, 160, 192, 224, 134, 166, 198, 230, 141, 173, 205, 237, 150, 182, 214, 246,
256, 288, 320, 352, 384, 416, 448, 480, 268, 300, 332, 364, 396, 428, 460, 492
};
static const uint32_t SoundUnitSize = 212;
static constexpr uint32_t BfuAmountTab[8] = {20, 28, 32, 36, 40, 44, 48, 52};
static const uint32_t BitsPerBfuAmountTabIdx = 3;
static const uint32_t BitsPerIDWL = 4;
static const uint32_t BitsPerIDSF = 6;
static float ScaleTable[64];
static float SineWindow[32];
static uint32_t BfuToBand(uint32_t i) {
if (i < 20)
return 0;
if (i < 36)
return 1;
return 2;
}
public:
static const uint32_t NumSamples = 512;
TAtrac1Data() {
if (ScaleTable[0] == 0) {
for (uint32_t i = 0; i < 64; i++) {
ScaleTable[i] = pow(2.0, (double)(i / 3.0 - 21.0));
}
}
if (SineWindow[0] == 0) {
for (uint32_t i = 0; i < 32; i++) {
SineWindow[i] = sin((i + 0.5) * (M_PI / (2.0 * 32.0)));
}
}
}
};
} //namespace NAtrac1
} //namespace NAtracDEnc
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