Add MediaPlayer support to AVFoundation plugin

This plugin would be used on Mac 10.7+ where without the QuickTime C API
our QT7 media player performance was crippled.

Change-Id: Iaadb1990a8f63393c4cd02d096624e0fed42b40f
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Jason Barron <jason.barron@digia.com>
Reviewed-by: Andy Nichols <andy.nichols@digia.com>

src/plugins/avfoundation/mediaplayer/avfmediaplayersession.h

@@ -0,0 +1,181 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef AVFMEDIAPLAYERSESSION_H
+#define AVFMEDIAPLAYERSESSION_H
+
+#include <QtCore/QObject>
+#include <QtCore/QByteArray>
+#include <QtCore/QSet>
+#include <QtCore/QResource>
+
+#include <QtMultimedia/QMediaPlayerControl>
+#include <QtMultimedia/QMediaPlayer>
+
+QT_BEGIN_NAMESPACE
+
+class AVFMediaPlayerService;
+class AVFVideoOutput;
+
+class AVFMediaPlayerSession : public QObject
+{
+    Q_OBJECT
+public:
+    AVFMediaPlayerSession(AVFMediaPlayerService *service, QObject *parent = 0);
+    virtual ~AVFMediaPlayerSession();
+
+    void setVideoOutput(AVFVideoOutput *output);
+    void *currentAssetHandle();
+
+    QMediaPlayer::State state() const;
+    QMediaPlayer::MediaStatus mediaStatus() const;
+
+    QMediaContent media() const;
+    const QIODevice *mediaStream() const;
+    void setMedia(const QMediaContent &content, QIODevice *stream);
+
+    qint64 position() const;
+    qint64 duration() const;
+
+    int bufferStatus() const;
+
+    int volume() const;
+    bool isMuted() const;
+
+    bool isAudioAvailable() const;
+    bool isVideoAvailable() const;
+
+    bool isSeekable() const;
+    QMediaTimeRange availablePlaybackRanges() const;
+
+    qreal playbackRate() const;
+
+public Q_SLOTS:
+    void setPlaybackRate(qreal rate);
+
+    void setPosition(qint64 pos);
+
+    void play();
+    void pause();
+    void stop();
+
+    void setVolume(int volume);
+    void setMuted(bool muted);
+
+    void processEOS();
+    void processLoadStateChange();
+    void processPositionChange();
+
+    void processCurrentItemChanged();
+
+Q_SIGNALS:
+    void positionChanged(qint64 position);
+    void durationChanged(qint64 duration);
+    void stateChanged(QMediaPlayer::State newState);
+    void mediaStatusChanged(QMediaPlayer::MediaStatus status);
+    void volumeChanged(int volume);
+    void mutedChanged(bool muted);
+    void audioAvailableChanged(bool audioAvailable);
+    void videoAvailableChanged(bool videoAvailable);
+    void error(int error, const QString &errorString);
+
+private:
+    class ResourceHandler {
+    public:
+        ResourceHandler():resource(0) {}
+        ~ResourceHandler() { clear(); }
+        void setResourceFile(const QString &file) {
+            if (resource) {
+                if (resource->fileName() == file)
+                    return;
+                delete resource;
+                rawData.clear();
+            }
+            resource = new QResource(file);
+        }
+        bool isValid() const { return resource && resource->isValid() && resource->data() != 0; }
+        const uchar *data() {
+            if (!isValid())
+                return 0;
+            if (resource->isCompressed()) {
+                if (rawData.size() == 0)
+                    rawData = qUncompress(resource->data(), resource->size());
+                return (const uchar *)rawData.constData();
+            }
+            return resource->data();
+        }
+        qint64 size() {
+            if (data() == 0)
+                return 0;
+            return resource->isCompressed() ? rawData.size() : resource->size();
+        }
+        void clear() {
+            delete resource;
+            rawData.clear();
+        }
+        QResource *resource;
+        QByteArray rawData;
+    };
+
+    AVFMediaPlayerService *m_service;
+    AVFVideoOutput *m_videoOutput;
+
+    QMediaPlayer::State m_state;
+    QMediaPlayer::MediaStatus m_mediaStatus;
+    QIODevice *m_mediaStream;
+    QMediaContent m_resources;
+    ResourceHandler m_resourceHandler;
+
+    bool m_muted;
+    bool m_tryingAsync;
+    int m_volume;
+    qreal m_rate;
+
+    qint64 m_duration;
+    bool m_videoAvailable;
+    bool m_audioAvailable;
+
+    void *m_observer;
+};
+
+QT_END_NAMESPACE
+
+#endif // AVFMEDIAPLAYERSESSION_H