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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtMultimedia module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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 QAUDIOOUTPUTALSA_H
#define QAUDIOOUTPUTALSA_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/qelapsedtimer.h>
#include <QtCore/qdatetime.h>
#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudiodeviceinfo.h>
#include <QtMultimedia/qaudioengine.h>
QT_BEGIN_NAMESPACE
class OutputPrivate;
class QAudioOutputPrivate : public QAbstractAudioOutput
{
friend class OutputPrivate;
Q_OBJECT
public:
QAudioOutputPrivate(const QByteArray &device, const QAudioFormat& audioFormat);
~QAudioOutputPrivate();
qint64 write( const char *data, qint64 len );
QIODevice* start(QIODevice* device = 0);
void stop();
void reset();
void suspend();
void resume();
int bytesFree() 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;
QAudioFormat format() const;
QIODevice* audioSource;
QAudioFormat settings;
QAudio::Error errorState;
QAudio::State deviceState;
private slots:
void userFeed();
void feedback();
void updateAvailable();
bool deviceReady();
signals:
void processMore();
private:
bool opened;
bool pullMode;
bool resuming;
int buffer_size;
int period_size;
int intervalTime;
qint64 totalTimeValue;
unsigned int buffer_time;
unsigned int period_time;
snd_pcm_uframes_t buffer_frames;
snd_pcm_uframes_t period_frames;
static void async_callback(snd_async_handler_t *ahandler);
int xrun_recovery(int err);
int setFormat();
bool open();
void close();
QTimer* timer;
QByteArray m_device;
int bytesAvailable;
QElapsedTimer timeStamp;
QElapsedTimer clockStamp;
qint64 elapsedTimeOffset;
char* audioBuffer;
snd_pcm_t* handle;
snd_async_handler_t* ahandler;
snd_pcm_access_t access;
snd_pcm_format_t pcmformat;
snd_timestamp_t* timestamp;
snd_pcm_hw_params_t *hwparams;
};
class OutputPrivate : public QIODevice
{
friend class QAudioOutputPrivate;
Q_OBJECT
public:
OutputPrivate(QAudioOutputPrivate* audio);
~OutputPrivate();
qint64 readData( char* data, qint64 len);
qint64 writeData(const char* data, qint64 len);
private:
QAudioOutputPrivate *audioDevice;
};
QT_END_NAMESPACE
#endif
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