399500f87e
Change-Id: Ia8c1c38aba1544603fada8c414cc856f365fd15b Reviewed-by: Akseli Salovaara <akseli.salovaara@digia.com> Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
140 lines
3.7 KiB
C++
140 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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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#ifndef WAVEDECODER_H
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#define WAVEDECODER_H
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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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#include <QtCore/qiodevice.h>
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#include <qaudioformat.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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class QWaveDecoder : public QIODevice
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{
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Q_OBJECT
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public:
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explicit QWaveDecoder(QIODevice *source, QObject *parent = 0);
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~QWaveDecoder();
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QAudioFormat audioFormat() const;
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int duration() const;
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qint64 size() const;
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bool isSequential() const;
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qint64 bytesAvailable() const;
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Q_SIGNALS:
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void formatKnown();
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void parsingError();
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private Q_SLOTS:
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void handleData();
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private:
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qint64 readData(char *data, qint64 maxlen);
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qint64 writeData(const char *data, qint64 len);
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bool enoughDataAvailable();
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bool findChunk(const char *chunkId);
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void discardBytes(qint64 numBytes);
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void parsingFailed();
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enum State {
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InitialState,
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WaitingForFormatState,
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WaitingForDataState
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};
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struct chunk
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{
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char id[4];
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quint32 size;
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};
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bool peekChunk(chunk* pChunk);
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struct RIFFHeader
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{
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chunk descriptor;
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char type[4];
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};
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struct WAVEHeader
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{
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chunk descriptor;
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quint16 audioFormat;
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quint16 numChannels;
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quint32 sampleRate;
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quint32 byteRate;
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quint16 blockAlign;
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quint16 bitsPerSample;
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};
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bool haveFormat;
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qint64 dataSize;
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QAudioFormat format;
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QIODevice *source;
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State state;
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quint32 junkToSkip;
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bool bigEndian;
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};
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // WAVEDECODER_H
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