/****************************************************************************

**

** 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.

**

** $QT_BEGIN_LICENSE:LGPL$

** 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.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef WAVEDECODER_H

#define WAVEDECODER_H

//

//  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.

//

#include <QtCore/qiodevice.h>

#include <qaudioformat.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class WaveDecoder : public QIODevice

{

    Q_OBJECT

public:

    explicit WaveDecoder(QIODevice *source, QObject *parent = 0);

    ~WaveDecoder();

    QAudioFormat audioFormat() const;

    int duration() const;

    qint64 size() const;

    bool isSequential() const;

    qint64 bytesAvailable() const;

Q_SIGNALS:

    void formatKnown();

    void invalidFormat();

private Q_SLOTS:

    void handleData();

private:

    qint64 readData(char *data, qint64 maxlen);

    qint64 writeData(const char *data, qint64 len);

    struct chunk

    {

        char        id[4];

        quint32     size;

    };

    struct RIFFHeader

    {

        chunk       descriptor;

        char        type[4];

    };

    struct WAVEHeader

    {

        chunk       descriptor;

        quint16     audioFormat;

        quint16     numChannels;

        quint32     sampleRate;

        quint32     byteRate;

        quint16     blockAlign;

        quint16     bitsPerSample;

    };

    struct DATAHeader

    {

        chunk       descriptor;

    };

    struct CombinedHeader

    {

        RIFFHeader  riff;

        WAVEHeader  wave;

    };

    bool haveFormat;

    qint64 dataSize;

    qint64 remaining;

    QAudioFormat format;

    QIODevice *source;

    CombinedHeader header;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // WAVEDECODER_H