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Diffstat (limited to 'src/multimediakit/audio/qaudio_symbian_p.h')
| -rw-r--r-- | src/multimediakit/audio/qaudio_symbian_p.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/multimediakit/audio/qaudio_symbian_p.h b/src/multimediakit/audio/qaudio_symbian_p.h new file mode 100644 index 000000000..26f1a3f44 --- /dev/null +++ b/src/multimediakit/audio/qaudio_symbian_p.h @@ -0,0 +1,204 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists for the convenience +// of other Qt classes. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#ifndef QAUDIO_SYMBIAN_P_H +#define QAUDIO_SYMBIAN_P_H + +#include <QtCore/qnamespace.h> +#include <QtCore/QList> +#include <QtCore/QString> +#include <qaudioformat.h> +#include <qaudio.h> +#include <sounddevice.h> + +QT_BEGIN_NAMESPACE + +namespace SymbianAudio { + +/** + * Default values used by audio input and output classes, when underlying + * DevSound instance has not yet been created. + */ + +const int DefaultBufferSize = 4096; // bytes +const int DefaultNotifyInterval = 1000; // ms + +/** + * Enumeration used to track state of internal DevSound instances. + * Values are translated to the corresponding QAudio::State values by + * SymbianAudio::Utils::stateNativeToQt. + */ +enum State { + ClosedState + , InitializingState + , ActiveState + , IdleState + // QAudio is suspended; DevSound is paused + , SuspendedPausedState + // QAudio is suspended; DevSound is stopped + , SuspendedStoppedState +}; + +/** + * Wrapper around DevSound instance + */ +class DevSoundWrapper + : public QObject + , public MDevSoundObserver +{ + Q_OBJECT + +public: + DevSoundWrapper(QAudio::Mode mode, QObject *parent = 0); + ~DevSoundWrapper(); + +public: + // List of supported codecs; can be called once object is constructed + const QList<QString>& supportedCodecs() const; + + // Asynchronous initialization function; emits devsoundInitializeComplete + void initialize(const QString& codec); + + // Capabilities, for selected codec. Can be called once initialize has returned + // successfully. + const QList<int>& supportedFrequencies() const; + const QList<int>& supportedChannels() const; + const QList<int>& supportedSampleSizes() const; + const QList<QAudioFormat::Endian>& supportedByteOrders() const; + const QList<QAudioFormat::SampleType>& supportedSampleTypes() const; + + bool isFormatSupported(const QAudioFormat &format) const; + + int samplesProcessed() const; + bool setFormat(const QAudioFormat &format); + bool start(); + + // If DevSound implementation supports pause, calls pause and returns true. + // Otherwise calls stop and returns false. In this case, all DevSound buffers + // currently held by the backend must be discarded. + bool pause(); + + void resume(); + + void stop(); + void bufferProcessed(); +#ifndef PRE_S60_52_PLATFORM + int flush(); +#endif + +public: + // MDevSoundObserver + void InitializeComplete(TInt aError); + void ToneFinished(TInt aError); + void BufferToBeFilled(CMMFBuffer *aBuffer); + void PlayError(TInt aError); + void BufferToBeEmptied(CMMFBuffer *aBuffer); + void RecordError(TInt aError); + void ConvertError(TInt aError); + void DeviceMessage(TUid aMessageType, const TDesC8 &aMsg); + +signals: + void initializeComplete(int error); + void bufferToBeProcessed(CMMFBuffer *buffer); + void processingError(int error); + +private: + void getSupportedCodecs(); + void populateCapabilities(); + bool isResumeSupported() const; + +private: + const QAudio::Mode m_mode; + TMMFState m_nativeMode; + + enum State { + StateIdle, + StateInitializing, + StateInitialized + } m_state; + + CMMFDevSound* m_devsound; + TFourCC m_fourcc; + + QList<QString> m_supportedCodecs; + QList<int> m_supportedFrequencies; + QList<int> m_supportedChannels; + QList<int> m_supportedSampleSizes; + QList<QAudioFormat::Endian> m_supportedByteOrders; + QList<QAudioFormat::SampleType> m_supportedSampleTypes; + +}; + + +namespace Utils { + +/** + * Convert internal states to QAudio states. + */ +QAudio::State stateNativeToQt(State nativeState); + +/** + * Convert data length to number of samples. + */ +qint64 bytesToSamples(const QAudioFormat &format, qint64 length); + +/** + * Convert number of samples to data length. + */ +qint64 samplesToBytes(const QAudioFormat &format, qint64 samples); + +} // namespace Utils +} // namespace SymbianAudio + +QT_END_NAMESPACE + +#endif |