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| |
| #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_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 = nullptr); |
| ~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 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 |