plugins/multimedia/symbian/mmf/mediaplayer/s60mediarecognizer.cpp
changeset 0 876b1a06bc25
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/multimedia/symbian/mmf/mediaplayer/s60mediarecognizer.cpp	Wed Aug 25 15:49:42 2010 +0300
@@ -0,0 +1,123 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "s60mediarecognizer.h"
+#include <e32def.h>
+#include <e32cmn.h>
+#include <QtCore/qurl.h>
+#include <QtCore/qdir.h>
+#include <QtCore/qdebug.h>
+
+#include <apgcli.h>
+
+static const TInt KMimeTypePrefixLength = 6; // "audio/" or "video/"
+_LIT(KMimeTypePrefixAudio, "audio/");
+_LIT(KMimeTypePrefixVideo, "video/");
+
+S60MediaRecognizer::S60MediaRecognizer(QObject *parent) : QObject(parent)
+{
+}
+
+S60MediaRecognizer::~S60MediaRecognizer()
+{
+    m_file.Close();
+    m_fileServer.Close();
+    m_recognizer.Close();
+}
+
+S60MediaRecognizer::MediaType S60MediaRecognizer::mediaType(const QUrl &url)
+{
+    bool isStream = (url.scheme() == "file")?false:true;
+
+    if (isStream)
+        return Url;
+    else
+        return identifyMediaType(url.toLocalFile());
+}
+
+S60MediaRecognizer::MediaType S60MediaRecognizer::identifyMediaType(const QString& fileName)
+{
+    S60MediaRecognizer::MediaType result = Video; // default to videoplayer
+    bool recognizerOpened = false;
+
+    TInt err = m_recognizer.Connect();
+    if (err == KErrNone) {
+        recognizerOpened = true;
+    }
+
+    err = m_fileServer.Connect();
+    if (err == KErrNone) {
+        recognizerOpened = true;
+    }
+
+    // This is needed for sharing file handles for the recognizer
+    err = m_fileServer.ShareProtected();
+    if (err == KErrNone) {
+        recognizerOpened = true;
+    }
+
+    if (recognizerOpened) {
+        m_file.Close();
+        err = m_file.Open(m_fileServer, QString2TPtrC(QDir::toNativeSeparators(fileName)), EFileRead |
+            EFileShareReadersOnly);
+
+        if (err == KErrNone) {
+            TDataRecognitionResult recognizerResult;
+            err = m_recognizer.RecognizeData(m_file, recognizerResult);
+            if (err == KErrNone) {
+                const TPtrC mimeType = recognizerResult.iDataType.Des();
+
+                if (mimeType.Left(KMimeTypePrefixLength).Compare(KMimeTypePrefixAudio) == 0) {
+                    result = Audio;
+                } else if (mimeType.Left(KMimeTypePrefixLength).Compare(KMimeTypePrefixVideo) == 0) {
+                    result = Video;
+                }
+            }
+        }
+    }
+    return result;
+}
+
+TPtrC S60MediaRecognizer::QString2TPtrC( const QString& string )
+{
+    // Returned TPtrC is valid as long as the given parameter is valid and unmodified
+    return TPtrC16(static_cast<const TUint16*>(string.utf16()), string.length());
+}