1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "qmediastoragelocation_p.h"
41
42#include <QStandardPaths>
43
44QT_BEGIN_NAMESPACE
45
46QMediaStorageLocation::QMediaStorageLocation()
47{
48}
49
50void QMediaStorageLocation::addStorageLocation(MediaType type, const QString &location)
51{
52 m_customLocations[type].append(t: location);
53}
54
55QDir QMediaStorageLocation::defaultLocation(MediaType type) const
56{
57 QStringList dirCandidates;
58
59 dirCandidates << m_customLocations.value(akey: type);
60
61 switch (type) {
62 case Movies:
63 dirCandidates << QStandardPaths::writableLocation(type: QStandardPaths::MoviesLocation);
64 break;
65 case Music:
66 dirCandidates << QStandardPaths::writableLocation(type: QStandardPaths::MusicLocation);
67 break;
68 case Pictures:
69 dirCandidates << QStandardPaths::writableLocation(type: QStandardPaths::PicturesLocation);
70 default:
71 break;
72 }
73
74 dirCandidates << QDir::homePath();
75 dirCandidates << QDir::currentPath();
76 dirCandidates << QDir::tempPath();
77
78 for (const QString &path : qAsConst(t&: dirCandidates)) {
79 if (QFileInfo(path).isWritable())
80 return QDir(path);
81 }
82
83 return QDir();
84}
85
86QString QMediaStorageLocation::generateFileName(const QString &requestedName,
87 MediaType type,
88 const QString &prefix,
89 const QString &extension) const
90{
91 if (requestedName.isEmpty())
92 return generateFileName(prefix, dir: defaultLocation(type), extension);
93
94 QString path = requestedName;
95
96 if (QFileInfo(path).isRelative())
97 path = defaultLocation(type).absoluteFilePath(fileName: path);
98
99 if (QFileInfo(path).isDir())
100 return generateFileName(prefix, dir: QDir(path), extension);
101
102 if (!path.endsWith(s: extension))
103 path.append(s: QString(QLatin1String(".%1")).arg(a: extension));
104
105 return path;
106}
107
108QString QMediaStorageLocation::generateFileName(const QString &prefix,
109 const QDir &dir,
110 const QString &extension) const
111{
112 QMutexLocker lock(&m_mutex);
113
114 const QString lastMediaKey = dir.absolutePath() + QLatin1Char(' ') + prefix + QLatin1Char(' ') + extension;
115 qint64 lastMediaIndex = m_lastUsedIndex.value(akey: lastMediaKey, adefaultValue: 0);
116
117 if (lastMediaIndex == 0) {
118 // first run, find the maximum media number during the fist capture
119 const auto list = dir.entryList(nameFilters: QStringList() << QString(QLatin1String("%1*.%2")).arg(a: prefix).arg(a: extension));
120 for (const QString &fileName : list) {
121 const qint64 mediaIndex = fileName.midRef(position: prefix.length(), n: fileName.size() - prefix.length() - extension.length() - 1).toInt();
122 lastMediaIndex = qMax(a: lastMediaIndex, b: mediaIndex);
123 }
124 }
125
126 // don't just rely on cached lastMediaIndex value,
127 // someone else may create a file after camera started
128 while (true) {
129 const QString name = QString(QLatin1String("%1%2.%3")).arg(a: prefix)
130 .arg(a: lastMediaIndex + 1, fieldwidth: 8, base: 10, fillChar: QLatin1Char('0'))
131 .arg(a: extension);
132
133 const QString path = dir.absoluteFilePath(fileName: name);
134 if (!QFileInfo::exists(file: path)) {
135 m_lastUsedIndex[lastMediaKey] = lastMediaIndex + 1;
136 return path;
137 }
138
139 lastMediaIndex++;
140 }
141
142 return QString();
143}
144
145QT_END_NAMESPACE
146

source code of qtmultimedia/src/multimedia/qmediastoragelocation.cpp