Initial implementation of Mac camera backend

Based on AVFoundation framework Change-Id: If4cfd105a592f50b42606624548b9ffc870e3e47 Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
2012-08-17 13:44:14 +10:00
parent 09a7fda971
commit 37b872da9e
27 changed files with 3009 additions and 0 deletions
--- a/src/plugins/avfoundation/camera/avfstoragelocation.mm
+++ b/src/plugins/avfoundation/camera/avfstoragelocation.mm
@@ -0,0 +1,137 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "avfstoragelocation.h"
+#include "QtCore/qstandardpaths.h"
+
+
+QT_BEGIN_NAMESPACE
+
+
+AVFStorageLocation::AVFStorageLocation()
+{
+}
+
+AVFStorageLocation::~AVFStorageLocation()
+{
+}
+
+/*!
+ * Generate the actual file name from user requested one.
+ * requestedName may be either empty (the default dir and naming theme is used),
+ * points to existing dir (the default name used)
+ * or specify the full actual path.
+ */
+QString AVFStorageLocation::generateFileName(const QString &requestedName,
+                                             QCamera::CaptureMode mode,
+                                             const QString &prefix,
+                                             const QString &ext) const
+{
+    if (requestedName.isEmpty())
+        return generateFileName(prefix, defaultDir(mode), ext);
+
+    if (QFileInfo(requestedName).isDir())
+        return generateFileName(prefix, QDir(requestedName), ext);
+
+    return requestedName;
+}
+
+QDir AVFStorageLocation::defaultDir(QCamera::CaptureMode mode) const
+{
+    QStringList dirCandidates;
+
+    if (mode == QCamera::CaptureVideo) {
+        dirCandidates << QStandardPaths::writableLocation(QStandardPaths::MoviesLocation);
+    } else {
+        dirCandidates << QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
+    }
+
+    dirCandidates << QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
+    dirCandidates << QDir::homePath();
+    dirCandidates << QDir::currentPath();
+    dirCandidates << QDir::tempPath();
+
+    Q_FOREACH (const QString &path, dirCandidates) {
+        if (QFileInfo(path).isWritable())
+            return QDir(path);
+    }
+
+    return QDir();
+}
+
+QString AVFStorageLocation::generateFileName(const QString &prefix, const QDir &dir, const QString &ext) const
+{
+    QString lastClipKey = dir.absolutePath()+QLatin1Char(' ')+prefix+QLatin1Char(' ')+ext;
+    int lastClip = m_lastUsedIndex.value(lastClipKey, 0);
+
+    if (lastClip == 0) {
+        //first run, find the maximum clip number during the fist capture
+        Q_FOREACH (const QString &fileName, dir.entryList(QStringList() << QString("%1*.%2").arg(prefix).arg(ext))) {
+            int imgNumber = fileName.mid(prefix.length(), fileName.size()-prefix.length()-ext.length()-1).toInt();
+            lastClip = qMax(lastClip, imgNumber);
+        }
+    }
+
+
+    //don't just rely on cached lastClip value,
+    //someone else may create a file after camera started
+    while (true) {
+        QString name = QString("%1%2.%3").arg(prefix)
+                                         .arg(lastClip+1,
+                                         4, //fieldWidth
+                                         10,
+                                         QLatin1Char('0'))
+                                         .arg(ext);
+
+        QString path = dir.absoluteFilePath(name);
+        if (!QFileInfo(path).exists()) {
+            m_lastUsedIndex[lastClipKey] = lastClip+1;
+            return path;
+        }
+
+        lastClip++;
+    }
+
+    return QString();
+}
+
+
+QT_END_NAMESPACE