1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
#pragma once
#include <vector>
#include <map>
#include <cstdint>
#include "atrac1.h"
#include "../config.h"
namespace NAtracDEnc {
struct TScaledBlock {
TScaledBlock(uint8_t sfi) : ScaleFactorIndex(sfi) {}
/* const */ uint8_t ScaleFactorIndex = 0;
std::vector<TFloat> Values;
};
class TBlockSize;
template <class TBaseData>
class TScaler : public TBaseData {
std::map<TFloat, uint8_t>ScaleIndex;
public:
TScaler() {
for (int i = 0; i < 64; i++) {
ScaleIndex[TBaseData::ScaleTable[i]] = i;
}
}
TScaledBlock Scale(const TFloat* in, uint16_t len);
std::vector<TScaledBlock> ScaleFrame(const std::vector<TFloat>& specs, const TBlockSize& blockSize);
};
class TBlockSize {
static std::array<int, 4> Parse(NBitStream::TBitStream* stream) {
//ATRAC1 - 3 subbands, ATRAC3 - 4 subbands.
//TODO: rewrite
std::array<int, 4> 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, 4> Create(bool lowShort, bool midShort, bool hiShort) {
std::array<int, 4> 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))
{}
TBlockSize()
: LogCount({{0, 0, 0, 0}})
{}
const std::array<int, 4> LogCount;
};
} //namespace NAtracDEnc
|
