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#pragma once
#include <cstdint>
#include <array>
#include <map>
#include <math.h>
#include "../bitstream/bitstream.h"
const int QMF_BANDS = 3;
const int MAX_BFUS = 52;
class TAtrac1Data {
protected:
static constexpr uint32_t SpecsPerBlock[MAX_BFUS] = {
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[QMF_BANDS + 1] = {0, 20, 36, 52};
static constexpr uint32_t SpecsStartLong[MAX_BFUS] = {
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[MAX_BFUS] = {
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 const uint32_t NumSamples = 512;
static const uint8_t NumQMF = QMF_BANDS;
static double ScaleTable[64];
static double SineWindow[32];
uint32_t BfuToBand(uint32_t i) {
if (i < 20)
return 0;
if (i < 36)
return 1;
return 2;
}
public:
TAtrac1Data() {
if (ScaleTable[0] == 0) {
for (uint32_t i = 0; i < 64; i++) {
ScaleTable[i] = pow(2.0, (double)(i - 15.0) / 3.0);
}
}
if (SineWindow[0] == 0) {
for (uint32_t i = 0; i < 32; i++) {
SineWindow[i] = sin((i + 0.5) * (M_PI / (2.0 * 32.0)));
}
}
}
};
class TBlockSize {
static std::array<int, QMF_BANDS> Parse(NBitStream::TBitStream* stream) {
std::array<int,QMF_BANDS> tmp;
tmp[0] = 2 - stream->Read(2);
tmp[1] = 2 - stream->Read(2);
tmp[2] = 3 - stream->Read(2);
stream->Read(2); //skip unused 2 bits
return tmp;
}
static std::array<int,QMF_BANDS> Create(bool lowShort, bool midShort, bool hiShort) {
std::array<int,QMF_BANDS> tmp;
tmp[0] = lowShort ? 2 : 0;
tmp[1] = midShort ? 2 : 0;
tmp[2] = hiShort ? 3 : 0;
return tmp;
}
public:
TBlockSize(NBitStream::TBitStream* stream)
: LogCount(Parse(stream))
{}
TBlockSize(bool lowShort, bool midShort, bool hiShort)
: LogCount(Create(lowShort, midShort, hiShort))
{}
const std::array<int,QMF_BANDS> LogCount;
};
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