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/****************************************************************************
**
** Copyright (C) 2013 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 QSAMPLECACHE_P_H
#define QSAMPLECACHE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qobject.h>
#include <QtCore/qthread.h>
#include <QtCore/qurl.h>
#include <QtCore/qmutex.h>
#include <QtCore/qmap.h>
#include <QtCore/qset.h>
#include <qaudioformat.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QIODevice;
class QNetworkAccessManager;
class QSampleCache;
class QWaveDecoder;
// Lives in application thread
class Q_MULTIMEDIA_EXPORT QSample : public QObject
{
Q_OBJECT
public:
friend class QSampleCache;
enum State
{
Creating,
Loading,
Error,
Ready,
};
State state() const;
// These are not (currently) locked because they are only meant to be called after these
// variables are updated to their final states
const QByteArray& data() const { Q_ASSERT(state() == Ready); return m_soundData; }
const QAudioFormat& format() const { Q_ASSERT(state() == Ready); return m_audioFormat; }
void release();
Q_SIGNALS:
void error();
void ready();
protected:
QSample(const QUrl& url, QSampleCache *parent);
private Q_SLOTS:
void load();
void decoderError();
void readSample();
void decoderReady();
private:
void onReady();
void cleanup();
void addRef();
void loadIfNecessary();
QSample();
~QSample();
mutable QMutex m_mutex;
QSampleCache *m_parent;
QByteArray m_soundData;
QAudioFormat m_audioFormat;
QIODevice *m_stream;
QWaveDecoder *m_waveDecoder;
QUrl m_url;
qint64 m_sampleReadLength;
State m_state;
int m_ref;
};
class Q_MULTIMEDIA_EXPORT QSampleCache : public QObject
{
Q_OBJECT
public:
friend class QSample;
QSampleCache(QObject *parent = 0);
~QSampleCache();
QSample* requestSample(const QUrl& url);
void setCapacity(qint64 capacity);
bool isLoading() const;
bool isCached(const QUrl& url) const;
Q_SIGNALS:
void isLoadingChanged();
private:
QMap<QUrl, QSample*> m_samples;
QSet<QSample*> m_staleSamples;
QNetworkAccessManager *m_networkAccessManager;
mutable QMutex m_mutex;
qint64 m_capacity;
qint64 m_usage;
QThread m_loadingThread;
QNetworkAccessManager& networkAccessManager();
void refresh(qint64 usageChange);
bool notifyUnreferencedSample(QSample* sample);
void removeUnreferencedSample(QSample* sample);
void unloadSample(QSample* sample);
void loadingRelease();
int m_loadingRefCount;
QMutex m_loadingMutex;
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QSAMPLECACHE_P_H
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