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//

//  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/qdatetime.h>

#include "qaudio.h"

#include "qaudiodeviceinfo.h"

#include "qaudiosystem.h"

QT_BEGIN_NAMESPACE

class OutputPrivate;

class QAudioOutputPrivate : public QAbstractAudioOutput

{

    friend class OutputPrivate;

    Q_OBJECT

public:

    QAudioOutputPrivate(const QByteArray &device);

    ~QAudioOutputPrivate();

    qint64 write( const char *data, qint64 len );

    void start(QIODevice* device);

    QIODevice* start();

    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;

    void setFormat(const QAudioFormat& fmt);

    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;

    QTime timeStamp;

    QTime 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