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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* ttadec.h
*
* Description: TTAv1 decoder definitions and prototypes
* Developed by: Alexander Djourik <sasha@iszf.irk.ru>
* Pavel Zhilin <pzh@iszf.irk.ru>
*
* Copyright (c) 1999-2004 Alexander Djourik. All rights reserved.
*
*/
/*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Please see the file COPYING in this directory for full copyright
* information.
*/
#ifndef TTADEC_H_
#define TTADEC_H_
#ifdef _WIN32
#pragma pack(1)
#define __ATTRIBUTE_PACKED__
#else
#define __ATTRIBUTE_PACKED__ __attribute__((packed))
#endif
#define TTA1_SIGN 0x31415454
#define FRAME_TIME 1.04489795918367346939
#define MAX_ORDER 8
#ifndef WAVE_FORMAT_PCM
#define WAVE_FORMAT_PCM 1
#endif
#ifdef _WIN32
typedef unsigned __int64 uint64;
#else
typedef unsigned long long uint64;
#endif
/**
* moved to gstttadec.c to silence gcc warnings
*/
/*
static const unsigned long bit_mask[] = {
0x00000000, 0x00000001, 0x00000003, 0x00000007,
0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
0xffffffff
};
static const unsigned long bit_shift[] = {
0x00000001, 0x00000002, 0x00000004, 0x00000008,
0x00000010, 0x00000020, 0x00000040, 0x00000080,
0x00000100, 0x00000200, 0x00000400, 0x00000800,
0x00001000, 0x00002000, 0x00004000, 0x00008000,
0x00010000, 0x00020000, 0x00040000, 0x00080000,
0x00100000, 0x00200000, 0x00400000, 0x00800000,
0x01000000, 0x02000000, 0x04000000, 0x08000000,
0x10000000, 0x20000000, 0x40000000, 0x80000000,
0x80000000, 0x80000000, 0x80000000, 0x80000000,
0x80000000, 0x80000000, 0x80000000, 0x80000000
};
static const unsigned long *shift_16 = bit_shift + 4;
*/
typedef unsigned char byte;
#ifdef _BIG_ENDIAN
#define ENDSWAP_INT16(x) (((((x)>>8)&0xFF)|(((x)&0xFF)<<8)))
#define ENDSWAP_INT32(x) (((((x)>>24)&0xFF)|(((x)>>8)&0xFF00)|(((x)&0xFF00)<<8)|(((x)&0xFF)<<24)))
#define WRITE_BUFFER(x, bsize, out) { \
if (bsize > 2) *out++ = (byte)(*x >> 16); \
if (bsize > 1) *out++ = (byte)(*x >> 8); \
*out++ = (byte) *x; }
#else
#define ENDSWAP_INT16(x) (x)
#define ENDSWAP_INT32(x) (x)
#define WRITE_BUFFER(x, bsize, out) { \
*out++ = (byte) *x; \
if (bsize > 1) *out++ = (byte)(*x >> 8); \
if (bsize > 2) *out++ = (byte)(*x >> 16); }
#endif
#define PREDICTOR1(x, k) ((long)((((uint64)x << k) - x) >> k))
#define DEC(x) (((x)&1)?(++(x)>>1):(-(x)>>1))
#if 0
/* This doesn't compile on non-gcc compilers */
typedef struct {
unsigned long TTAid;
unsigned short AudioFormat;
unsigned short NumChannels;
unsigned short BitsPerSample;
unsigned long SampleRate;
unsigned long DataLength;
unsigned long CRC32;
} __ATTRIBUTE_PACKED__ tta_hdr;
#endif
typedef struct {
unsigned long k0;
unsigned long k1;
unsigned long sum0;
unsigned long sum1;
} adapt;
typedef struct {
long shift;
long round;
long error;
long mutex;
long qm[MAX_ORDER+1];
long dx[MAX_ORDER+1];
long dl[MAX_ORDER+1];
} fltst;
typedef struct {
fltst fst;
adapt rice;
long last;
} decoder;
#endif /* TTADEC_H_ */
|
