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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Speech module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSPEECHRECOGNITIONAUDIOBUFFER_H
#define QSPEECHRECOGNITIONAUDIOBUFFER_H
#include "qspeechrecognition_global.h"
#include <QtCore/QIODevice>
QT_BEGIN_NAMESPACE
class QSpeechRecognitionAudioBufferPrivate;
class QSPEECHRECOGNITION_EXPORT QSpeechRecognitionAudioBuffer : public QIODevice
{
Q_OBJECT
Q_DECLARE_PRIVATE(QSpeechRecognitionAudioBuffer)
protected:
qint64 readData(char *data, qint64 maxlen);
qint64 writeData(const char *data, qint64 len);
public:
struct AudioChunk
{
qint64 streamOffset;
char *data;
quint32 audioSize;
};
explicit QSpeechRecognitionAudioBuffer(QObject *parent = 0);
~QSpeechRecognitionAudioBuffer();
void setSampleRate(int sampleRate);
void setSampleSize(int sampleSize);
void setChannelCount(int channelCount);
int fifoLimit() const;
void setFifoLimit(int bytes);
int freeLimit() const;
void setFreeLimit(int bytes);
AudioChunk *nextChunk();
void releaseChunk(AudioChunk *chunk);
qint64 recordingTime(qint64 streamOffset) const;
qreal audioLevel() const;
bool isEmpty() const;
void clear(bool reset = false);
void close();
Q_SIGNALS:
void dataAvailable();
};
QT_END_NAMESPACE
#endif // QSPEECHRECOGNITIONAUDIOBUFFER_H
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