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/****************************************************************************
**
** 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 QtMultimedia module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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 <QtMultimedia/qaudioformat.h>
#include <QtMultimedia/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
, SuspendedState
};
/*
* Helper class for querying DevSound codec / format support
*/
class DevSoundCapabilities {
public:
DevSoundCapabilities(CMMFDevSound &devsound, QAudio::Mode mode);
~DevSoundCapabilities();
const RArray<TFourCC>& fourCC() const { return m_fourCC; }
const TMMFCapabilities& caps() const { return m_caps; }
private:
void constructL(CMMFDevSound &devsound, QAudio::Mode mode);
private:
RArray<TFourCC> m_fourCC;
TMMFCapabilities m_caps;
};
namespace Utils {
/**
* Convert native audio capabilities to QAudio lists.
*/
void capabilitiesNativeToQt(const DevSoundCapabilities &caps,
QList<int> &frequencies,
QList<int> &channels,
QList<int> &sampleSizes,
QList<QAudioFormat::Endian> &byteOrders,
QList<QAudioFormat::SampleType> &sampleTypes);
/**
* Check whether format is supported.
*/
bool isFormatSupported(const QAudioFormat &format,
const DevSoundCapabilities &caps);
/**
* Convert QAudioFormat to native format types.
*
* Note that, despite the name, DevSound uses TMMFCapabilities to specify
* single formats as well as capabilities.
*
* Note that this function does not modify outputFormat.iBufferSize.
*/
bool formatQtToNative(const QAudioFormat &inputFormat,
TUint32 &outputFourCC,
TMMFCapabilities &outputFormat);
/**
* Convert internal states to QAudio states.
*/
QAudio::State stateNativeToQt(State nativeState,
QAudio::State initializingState);
/**
* 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
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