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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 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 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
-
-QT_MODULE(Multimedia)
-
-
-
-class QWaveDecoder : public QIODevice
-{
- Q_OBJECT
-
-public:
- explicit QWaveDecoder(QIODevice *source, QObject *parent = 0);
- ~QWaveDecoder();
-
- QAudioFormat audioFormat() const;
- int duration() const;
-
- qint64 size() const;
- bool isSequential() const;
- qint64 bytesAvailable() const;
-
-Q_SIGNALS:
- void formatKnown();
- void parsingError();
-
-private Q_SLOTS:
- void handleData();
-
-private:
- qint64 readData(char *data, qint64 maxlen);
- qint64 writeData(const char *data, qint64 len);
-
- bool enoughDataAvailable();
- bool findChunk(const char *chunkId);
- void discardBytes(qint64 numBytes);
- void parsingFailed();
-
- enum State {
- InitialState,
- WaitingForFormatState,
- WaitingForDataState
- };
-
- struct chunk
- {
- char id[4];
- quint32 size;
- };
- bool peekChunk(chunk* pChunk);
-
- struct RIFFHeader
- {
- chunk descriptor;
- char type[4];
- };
- struct WAVEHeader
- {
- chunk descriptor;
- quint16 audioFormat;
- quint16 numChannels;
- quint32 sampleRate;
- quint32 byteRate;
- quint16 blockAlign;
- quint16 bitsPerSample;
- };
-
- bool haveFormat;
- qint64 dataSize;
- QAudioFormat format;
- QIODevice *source;
- State state;
- quint32 junkToSkip;
- bool bigEndian;
-};
-
-QT_END_NAMESPACE
-
-QT_END_HEADER
-
-#endif // WAVEDECODER_H