Progressive download in Phonon MMF backend: added download managers

This patch adds a Download class which uses the RHttpDownloadMgr
API to download a media clip over HTTP.

Task-number: QTBUG-10769
Reviewed-by: Derick Hawcroft

1 files changed, 111 insertions, 0 deletions

diff --git a/src/3rdparty/phonon/mmf/download.h b/src/3rdparty/phonon/mmf/download.h
new file mode 100644
index 0000000..b57348b
--- /dev/null
+++ b/src/3rdparty/phonon/mmf/download.h
@@ -0,0 +1,111 @@
+/*  This file is part of the KDE project.
+
+Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+
+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 or 3 of the License.
+
+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.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#ifndef PHONON_MMF_DOWNLOAD_H
+#define PHONON_MMF_DOWNLOAD_H
+
+#include <QtCore/QMetaType>
+#include <QtCore/QString>
+#include <QtCore/QUrl>
+#include <downloadmgrclient.h>
+
+QT_FORWARD_DECLARE_CLASS(QByteArray)
+QT_FORWARD_DECLARE_CLASS(QFile)
+
+QT_BEGIN_NAMESPACE
+
+namespace Phonon
+{
+namespace MMF
+{
+
+class Download;
+
+class DownloadPrivate : public QObject
+                      , public MHttpDownloadMgrObserver
+{
+    Q_OBJECT
+public:
+    DownloadPrivate(Download *parent);
+    ~DownloadPrivate();
+    bool start();
+    void resume();
+signals:
+    void error();
+    void targetFileNameChanged();
+    void lengthChanged(qint64 length);
+    void complete();
+private:
+    // MHttpDownloadMgrObserver
+    void HandleDMgrEventL(RHttpDownload &aDownload, THttpDownloadEvent aEvent);
+private:
+    Download *m_parent;
+    RHttpDownloadMgr m_downloadManager;
+    RHttpDownload *m_download;
+    qint64 m_length;
+};
+
+class Download : public QObject
+{
+    Q_OBJECT
+    friend class DownloadPrivate;
+public:
+    Download(const QUrl &url, QObject *parent = 0);
+    ~Download();
+    const QUrl &sourceUrl() const;
+    const QString &targetFileName() const;
+    void start();
+
+    // Only has effect when QT_PHONON_MMF_DOWNLOAD_DUMMY is defined
+    void resume();
+
+    enum State {
+        Idle,
+        Initializing,
+        Downloading,
+        Complete,
+        Error
+    };
+
+signals:
+    void lengthChanged(qint64 length);
+    void stateChanged(Download::State state);
+
+private:
+    void setState(State state);
+
+    // Called by DownloadPrivate
+    void error();
+    void downloadStarted(const QString &targetFileName);
+    void complete();
+
+private:
+    DownloadPrivate *m_private;
+    QUrl m_sourceUrl;
+    QString m_targetFileName;
+    State m_state;
+};
+
+}
+}
+
+QT_END_NAMESPACE
+
+Q_DECLARE_METATYPE(Phonon::MMF::Download::State)
+
+#endif