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
|
///////////////////////////////////////////////////////////////////////////////
//
/// \file lzma_encoder_presets.c
/// \brief Encoder presets
//
// Copyright (C) 2007 Lasse Collin
//
// 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.
//
///////////////////////////////////////////////////////////////////////////////
#include "common.h"
/*
#define pow2(e) (UINT32_C(1) << (e))
static const lzma_options_lzma presets[9] = {
// dict lc lp pb mode fb mf mfc
{ pow2(16), NULL, 0, 3, 0, 2, false, LZMA_MODE_FAST, 64, LZMA_MF_HC3, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(20), NULL, 0, 3, 0, 0, false, LZMA_MODE_FAST, 64, LZMA_MF_HC4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(19), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 64, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(20), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 64, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(21), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 128, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(22), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 128, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(23), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 128, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(24), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 273, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
{ pow2(25), NULL, 0, 3, 0, 0, false, LZMA_MODE_NORMAL, 273, LZMA_MF_BT4, 0, 0, 0, 0, 0, NULL, NULL },
};
extern LZMA_API lzma_bool
lzma_lzma_preset(lzma_options_lzma *options, uint32_t level)
{
if (level >= ARRAY_SIZE(presetes))
return true;
*options = presets[level];
return false;
}
*/
extern LZMA_API lzma_bool
lzma_lzma_preset(lzma_options_lzma *options, uint32_t level)
{
if (level >= 9)
return true;
memzero(options, sizeof(*options));
static const uint8_t shift[9] = { 16, 20, 19, 20, 21, 22, 23, 24, 25 };
options->dict_size = UINT32_C(1) << shift[level];
options->preset_dict = NULL;
options->preset_dict_size = 0;
options->lc = LZMA_LC_DEFAULT;
options->lp = LZMA_LP_DEFAULT;
options->pb = LZMA_PB_DEFAULT;
options->persistent = false;
options->mode = level <= 2 ? LZMA_MODE_FAST : LZMA_MODE_NORMAL;
options->nice_len = level <= 5 ? 32 : 64;
options->mf = level <= 1 ? LZMA_MF_HC3 : level <= 2 ? LZMA_MF_HC4
: LZMA_MF_BT4;
options->depth = 0;
return false;
}
|
