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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/qmutex.h>
#include <QtCore/qobject.h>
#include <QtCore/qpointer.h>
#include <QtCore/qset.h>
#include <QtCore/qthread.h>
#include <QtCore/qfuture.h>
#include <QtCore/qurl.h>
#include <QtCore/private/qglobal_p.h>
#include <QtMultimedia/qaudioformat.h>
#include <QtMultimedia/private/qmaybe_p.h>
#include <memory>
#include <optional>
QT_BEGIN_NAMESPACE
class QSampleCache;
class Q_MULTIMEDIA_EXPORT QSample
{
public:
friend class QSampleCache;
enum State : uint8_t {
Creating,
Error,
Ready,
};
using SharedSamplePromise = QSharedPointer<QPromise<QMaybe<QSample *, QSample::State>>>;
~QSample();
State state() const;
const QByteArray& data() const { Q_ASSERT(state() == Ready); return m_soundData; }
const QAudioFormat& format() const { Q_ASSERT(state() == Ready); return m_audioFormat; }
void setError();
void setData(QByteArray, QAudioFormat);
QSample(QUrl url, QSampleCache *parent);
private:
QSample();
// clang-format off
QSampleCache *m_parent;
QByteArray m_soundData;
QAudioFormat m_audioFormat;
const QUrl m_url;
State m_state = State::Creating;
// clang-format on
friend class QSampleCache;
void clearParent();
};
using SharedSamplePtr = std::shared_ptr<QSample>;
using WeakSamplePtr = std::weak_ptr<QSample>;
class Q_MULTIMEDIA_EXPORT QSampleCache : public QObject
{
public:
friend class QSample;
enum class SampleSourceType
{
File,
NetworkManager,
};
explicit QSampleCache(QObject *parent = nullptr);
~QSampleCache() override;
QFuture<SharedSamplePtr> requestSampleFuture(const QUrl &);
bool isCached(const QUrl& url) const;
// For tests only
void setSampleSourceType(SampleSourceType sampleSourceType)
{
m_sampleSourceType = sampleSourceType;
}
private:
std::unique_ptr<QIODevice> createStreamForSample(QSample &sample);
private:
using SharedSamplePromise = std::shared_ptr<QPromise<SharedSamplePtr>>;
mutable QRecursiveMutex m_mutex;
std::map<QUrl, WeakSamplePtr> m_loadedSamples;
std::map<QUrl, std::pair<SharedSamplePtr, QList<SharedSamplePromise>>> m_pendingSamples;
void removeUnreferencedSample(const QUrl &url);
using SampleLoadResult = std::optional<std::pair<QByteArray, QAudioFormat>>;
static SampleLoadResult loadSample(QByteArray);
#if QT_CONFIG(thread)
static SampleLoadResult
loadSample(const QUrl &, std::optional<SampleSourceType> forceSourceType = std::nullopt);
QThreadPool m_threadPool;
#endif
QFuture<SampleLoadResult> loadSampleAsync(const QUrl &);
std::optional<SampleSourceType> m_sampleSourceType;
};
QT_END_NAMESPACE
#endif // QSAMPLECACHE_P_H
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