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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
* 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 "pcmengin.h"
#include "aea.h"
#include "transient_detector.h"
#include "atrac/atrac1.h"
#include "atrac/atrac1_qmf.h"
#include "atrac/atrac_scale.h"
#include "lib/mdct/mdct.h"
#include <assert.h>
#include <vector>
namespace NAtracDEnc {
enum EMode {
E_ENCODE = 1,
E_DECODE = 2,
E_ATRAC3 = 4
};
class TAtrac1MDCT : public virtual NAtrac1::TAtrac1Data {
NMDCT::TMDCT<512> Mdct512;
NMDCT::TMDCT<256> Mdct256;
NMDCT::TMDCT<64> Mdct64;
NMDCT::TMIDCT<512> Midct512;
NMDCT::TMIDCT<256> Midct256;
NMDCT::TMIDCT<64> Midct64;
public:
void IMdct(TFloat specs[512], const TBlockSize& mode, TFloat* low, TFloat* mid, TFloat* hi);
void Mdct(TFloat specs[512], TFloat* low, TFloat* mid, TFloat* hi, const TBlockSize& blockSize);
TAtrac1MDCT()
: Mdct512(1)
, Mdct256(0.5)
, Mdct64(0.5)
, Midct512(512*2)
, Midct256(256*2)
, Midct64(64*2)
{}
};
class TAtrac1Encoder : public IProcessor<TFloat>, public TAtrac1MDCT, public virtual NAtrac1::TAtrac1Data {
TCompressedOutputPtr Aea;
const NAtrac1::TAtrac1EncodeSettings Settings;
TFloat PcmBufLow[2][256 + 16];
TFloat PcmBufMid[2][256 + 16];
TFloat PcmBufHi[2][512 + 16];
Atrac1AnalysisFilterBank<TFloat> AnalysisFilterBank[2];
class TTransientDetectors {
std::vector<TTransientDetector> transientDetectorLow;
std::vector<TTransientDetector> transientDetectorMid;
std::vector<TTransientDetector> transientDetectorHi;
public:
TTransientDetectors()
: transientDetectorLow(2, TTransientDetector(16, 128))
, transientDetectorMid(2, TTransientDetector(16, 128))
, transientDetectorHi(2, TTransientDetector(16, 256))
{}
TTransientDetector& GetDetector(uint32_t channel, uint32_t band) {
switch (band) {
case 0:
return transientDetectorLow[channel];
break;
case 1:
return transientDetectorMid[channel];
break;
case 2:
return transientDetectorHi[channel];
break;
default:
assert(false);
return transientDetectorLow[channel];
}
}
};
TAtrac1Encoder::TTransientDetectors TransientDetectors;
TScaler<TAtrac1Data> Scaler;
public:
TAtrac1Encoder(TCompressedOutputPtr&& aea, NAtrac1::TAtrac1EncodeSettings&& settings);
TPCMEngine<TFloat>::TProcessLambda GetLambda() override;
};
class TAtrac1Decoder : public IProcessor<TFloat>, public TAtrac1MDCT, public virtual NAtrac1::TAtrac1Data {
TCompressedInputPtr Aea;
const NAtrac1::TAtrac1EncodeSettings Settings;
TFloat PcmBufLow[2][256 + 16];
TFloat PcmBufMid[2][256 + 16];
TFloat PcmBufHi[2][512 + 16];
int32_t PcmValueMax = 1;
int32_t PcmValueMin = -1;
Atrac1SynthesisFilterBank<TFloat> SynthesisFilterBank[2];
public:
TAtrac1Decoder(TCompressedInputPtr&& aea);
TPCMEngine<TFloat>::TProcessLambda GetLambda() override;
};
}
|
