/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtMultimedia module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists for the convenience+
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// of other Qt classes.  This header file may change from version to+
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// version without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#ifndef QAUDIO_SYMBIAN_P_H+
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#define QAUDIO_SYMBIAN_P_H+
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+
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#include <QtCore/qnamespace.h>+
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#include <QtMultimedia/qaudioformat.h>+
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#include <QtMultimedia/qaudio.h>+
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#include <sounddevice.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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namespace SymbianAudio {+
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+
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/**+
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 * Default values used by audio input and output classes, when underlying+
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 * DevSound instance has not yet been created.+
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 */+
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+
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const int DefaultBufferSize = 4096; // bytes+
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const int DefaultNotifyInterval = 1000; // ms+
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+
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/**+
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 * Enumeration used to track state of internal DevSound instances.+
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 * Values are translated to the corresponding QAudio::State values by+
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 * SymbianAudio::Utils::stateNativeToQt.+
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 */+
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enum State {+
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        ClosedState+
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    ,   InitializingState+
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    ,   ActiveState+
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    ,   IdleState+
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    ,   SuspendedState+
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};+
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+
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/*+
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 * Helper class for querying DevSound codec / format support+
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 */+
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class DevSoundCapabilities {+
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public:+
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    DevSoundCapabilities(CMMFDevSound &devsound, QAudio::Mode mode);+
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    ~DevSoundCapabilities();+
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+
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    const RArray<TFourCC>& fourCC() const   { return m_fourCC; }+
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    const TMMFCapabilities& caps() const    { return m_caps; }+
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+
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private:+
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    void constructL(CMMFDevSound &devsound, QAudio::Mode mode);+
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+
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private:+
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    RArray<TFourCC> m_fourCC;+
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    TMMFCapabilities m_caps;+
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};+
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+
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namespace Utils {+
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+
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/**+
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 * Convert native audio capabilities to QAudio lists.+
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 */+
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void capabilitiesNativeToQt(const DevSoundCapabilities &caps,+
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                            QList<int> &frequencies,+
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                            QList<int> &channels,+
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                            QList<int> &sampleSizes,+
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                            QList<QAudioFormat::Endian> &byteOrders,+
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                            QList<QAudioFormat::SampleType> &sampleTypes);+
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+
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/**+
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 * Check whether format is supported.+
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 */+
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bool isFormatSupported(const QAudioFormat &format,+
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                       const DevSoundCapabilities &caps);+
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+
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/**+
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 * Convert QAudioFormat to native format types.+
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 *+
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 * Note that, despite the name, DevSound uses TMMFCapabilities to specify+
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 * single formats as well as capabilities.+
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 *+
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 * Note that this function does not modify outputFormat.iBufferSize.+
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 */+
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bool formatQtToNative(const QAudioFormat &inputFormat,+
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                      TUint32 &outputFourCC,+
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                      TMMFCapabilities &outputFormat);+
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+
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/**+
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 * Convert internal states to QAudio states.+
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 */+
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QAudio::State stateNativeToQt(State nativeState,+
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                              QAudio::State initializingState);+
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+
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/**+
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 * Convert data length to number of samples.+
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 */+
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qint64 bytesToSamples(const QAudioFormat &format, qint64 length);+
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+
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/**+
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 * Convert number of samples to data length.+
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 */+
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qint64 samplesToBytes(const QAudioFormat &format, qint64 samples);+
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+
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} // namespace Utils+
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} // namespace SymbianAudio+
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+
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QT_END_NAMESPACE+
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+
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#endif+
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