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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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.
//
#ifndef QAUDIOINPUTALSA_H
#define QAUDIOINPUTALSA_H
#include <alsa/asoundlib.h>
#include <QtCore/qfile.h>
#include <QtCore/qdebug.h>
#include <QtCore/qtimer.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qdatetime.h>
#include <QtCore/qiodevice.h>
#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudiodeviceinfo.h>
#include <QtMultimedia/qaudiosystem.h>
QT_BEGIN_NAMESPACE
class AlsaInputPrivate;
class RingBuffer
{
public:
RingBuffer();
void resize(int size);
int bytesOfDataInBuffer() const;
int freeBytes() const;
const char *availableData() const;
int availableDataBlockSize() const;
void readBytes(int bytes);
void write(char *data, int len);
private:
int m_head;
int m_tail;
QByteArray m_data;
};
class QAlsaAudioInput : public QAbstractAudioInput
{
Q_OBJECT
public:
QAlsaAudioInput(const QByteArray &device);
~QAlsaAudioInput();
qint64 read(char* data, qint64 len);
void start(QIODevice* device);
QIODevice* start();
void stop();
void reset();
void suspend();
void resume();
int bytesReady() const;
int periodSize() const;
void setBufferSize(int value);
int bufferSize() const;
void setNotifyInterval(int milliSeconds);
int notifyInterval() const;
qint64 processedUSecs() const;
qint64 elapsedUSecs() const;
QAudio::Error error() const;
QAudio::State state() const;
void setFormat(const QAudioFormat& fmt);
QAudioFormat format() const;
void setVolume(qreal);
qreal volume() const;
bool resuming;
snd_pcm_t* handle;
qint64 totalTimeValue;
QIODevice* audioSource;
QAudioFormat settings;
QAudio::Error errorState;
QAudio::State deviceState;
private slots:
void userFeed();
bool deviceReady();
private:
int checkBytesReady();
int xrun_recovery(int err);
int setFormat();
bool open();
void close();
void drain();
QTimer* timer;
QTime timeStamp;
QTime clockStamp;
qint64 elapsedTimeOffset;
int intervalTime;
RingBuffer ringBuffer;
int bytesAvailable;
QByteArray m_device;
bool pullMode;
int buffer_size;
int period_size;
unsigned int buffer_time;
unsigned int period_time;
snd_pcm_uframes_t buffer_frames;
snd_pcm_uframes_t period_frames;
snd_pcm_access_t access;
snd_pcm_format_t pcmformat;
snd_pcm_hw_params_t *hwparams;
qreal m_volume;
};
class AlsaInputPrivate : public QIODevice
{
Q_OBJECT
public:
AlsaInputPrivate(QAlsaAudioInput* audio);
~AlsaInputPrivate();
qint64 readData( char* data, qint64 len);
qint64 writeData(const char* data, qint64 len);
void trigger();
private:
QAlsaAudioInput *audioDevice;
};
QT_END_NAMESPACE
#endif
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