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/*
* Copyright (C) 2017 Konsulko Group
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/*
* Simple buffer device to act as input device for QAudioInput.
*
* It basically wraps QByteArray with some additional locking that
* the QBuffer class does not provide. It also ensures that reads
* return in units of the given format's sample size. This is
* required to handle the RTL-SDR library output sometimes arriving
* with half a sample at the end. QAudioOutput will blindly pass
* that half sample along and trigger a PulseAudio error if we do
* not handle it here.
*/
#ifndef OUTPUTBUFFER_H
#define OUTPUTBUFFER_H
#include <QtCore/QIODevice>
#include <QtCore/QMutex>
#include <QtMultimedia/QAudioFormat>
class OutputBuffer : public QIODevice
{
Q_OBJECT
public:
OutputBuffer(const QAudioFormat &format, QObject *parent);
~OutputBuffer();
void start();
void stop();
qint64 readData(char *data, qint64 maxlen);
qint64 writeData(const char *data, qint64 len);
qint64 bytesAvailable();
private:
QMutex m_mutex;
QByteArray m_buffer;
unsigned int m_sample_size;
};
#endif // OUTPUTBUFFER_H
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