libopenraw
makernotedir.cpp
1/*
2 * libopenraw - makernotedir.cpp
3 *
4 * Copyright (C) Hubert Figuiere
5 *
6 * This library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation, either version 3 of
9 * the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library. If not, see
18 * <http://www.gnu.org/licenses/>.
19 */
20
21#include <fcntl.h>
22
23#include <string.h>
24
25#include "makernotedir.hpp"
26#include "io/stream.hpp"
27#include "ifdfilecontainer.hpp"
28#include "trace.hpp"
29
30namespace OpenRaw {
31namespace Internals {
32
33/*
34 * For Makernote detection, see:
35 * http://owl.phy.queensu.ca/~phil/exiftool/makernote_types.html
36 * http://www.exiv2.org/makernote.html
37 */
38MakerNoteDir::Ref
40 IfdFileContainer & container)
41{
42 LOGDBG1("createMakerNote()\n");
43 char data[18];
44 auto file = container.file();
45 file->seek(offset, SEEK_SET);
46 file->read(&data, 18);
47
48 if (memcmp("Nikon\0", data, 6) == 0) {
49 if (data[6] == 1) {
50 return std::make_shared<MakerNoteDir>(
51 offset + 8, container, offset + 8, "Nikon2");
52 }
53 else if (data[6] == 2) {
54 // this one has an endian / TIFF header after the magic
55 return std::make_shared<MakerNoteDir>(
56 offset + 18, container, offset + 10, "Nikon");
57 }
58 else {
59 return std::make_shared<MakerNoteDir>(
60 offset, container, offset, "");
61 }
62 }
63
64 if (memcmp("OLYMPUS\0", data, 8) == 0) {
65 return std::make_shared<MakerNoteDir>(
66 offset + 12, container, offset, "Olympus2");
67 }
68
69 if (memcmp("OLYMP\0", data, 6) == 0) {
70 return std::make_shared<MakerNoteDir>(
71 offset + 8, container, offset + 8, "Olympus");
72 }
73
74 if (memcmp("MLT0", data + 10, 4) == 0) {
75 return std::make_shared<MakerNoteDir>(
76 offset, container, offset, "Minolta");
77 }
78
79 return std::make_shared<MakerNoteDir>(offset, container, offset, "");
80}
81
82MakerNoteDir::MakerNoteDir(off_t _offset,
83 IfdFileContainer & _container,
84 off_t mnote_offset,
85 const std::string & id)
86 : MakerNoteDir("", 0, _offset, _container, mnote_offset, id)
87{
88}
89
90MakerNoteDir::MakerNoteDir(const char* magic, size_t hlen,
91 off_t _offset,
92 IfdFileContainer & _container,
93 off_t mnote_offset,
94 const std::string & id)
95 : IfdDir(_offset, _container)
96 , m_magic(magic ? magic : "")
97 , m_hlen(hlen)
98 , m_mnote_offset(mnote_offset)
99 , m_id(id)
100{
101}
102
103MakerNoteDir::~MakerNoteDir()
104{
105}
106
107}
108}
109
110/*
111 Local Variables:
112 mode:c++
113 c-file-style:"stroustrup"
114 c-file-offsets:((innamespace . 0))
115 indent-tabs-mode:nil
116 fill-column:80
117 End:
118*/
off_t offset() const
Definition: ifddir.hpp:56
static Ref createMakerNote(off_t offset, IfdFileContainer &container)
CIFF is the container for CRW files. It is an attempt from Canon to make this a standard....
Definition: arwfile.cpp:30