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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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>
#include <qnetworkreply.h>
#include <private/qglobal_p.h>
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 loadingError(QNetworkReply::NetworkError);
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 = nullptr);
~QSampleCache();
QSample* requestSample(const QUrl& url);
void setCapacity(qint64 capacity);
bool isLoading() const;
bool isCached(const QUrl& url) const;
private:
QMap<QUrl, QSample*> m_samples;
QSet<QSample*> m_staleSamples;
QNetworkAccessManager *m_networkAccessManager;
mutable QRecursiveMutex 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
#endif // QSAMPLECACHE_P_H
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