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Diffstat (limited to 'src/multimedia/effects/qsamplecache_p.h')
| -rw-r--r-- | src/multimedia/effects/qsamplecache_p.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/multimedia/effects/qsamplecache_p.h b/src/multimedia/effects/qsamplecache_p.h new file mode 100644 index 000000000..91ca457e6 --- /dev/null +++ b/src/multimedia/effects/qsamplecache_p.h @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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, Nokia gives you certain additional +** rights. These rights are described in the Nokia 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 + +QT_MODULE(Multimedia) + + +class QNetworkAccessManager; +class QSampleCache; +class QWaveDecoder; + +// Lives in application thread +class 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 QSampleCache +{ +public: + friend class QSample; + + QSampleCache(); + ~QSampleCache(); + + QSample* requestSample(const QUrl& url); + void setCapacity(qint64 capacity); + +private: + QMap<QUrl, QSample*> m_samples; + QSet<QSample*> m_staleSamples; + QNetworkAccessManager *m_networkAccessManager; + 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); +}; + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // QSAMPLECACHE_P_H |