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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 QAUDIOINPUT_SYMBIAN_P_H

#define QAUDIOINPUT_SYMBIAN_P_H

#include <QtMultimedia/qaudioengine.h>

#include <QTime>

#include <QTimer>

#include <sounddevice.h>

#include "qaudio_symbian_p.h"

QT_BEGIN_NAMESPACE

class QAudioInputPrivate;

class SymbianAudioInputPrivate : public QIODevice

{

    friend class QAudioInputPrivate;

    Q_OBJECT

public:

    SymbianAudioInputPrivate(QAudioInputPrivate *audio);

    ~SymbianAudioInputPrivate();

    qint64 readData(char *data, qint64 len);

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

    void dataReady();

private:

    QAudioInputPrivate *const m_audioDevice;

};

class QAudioInputPrivate

    :   public QAbstractAudioInput

    ,   public MDevSoundObserver

{

    friend class SymbianAudioInputPrivate;

    Q_OBJECT

public:

    QAudioInputPrivate(const QByteArray &device,

                      const QAudioFormat &audioFormat);

    ~QAudioInputPrivate();

    // QAbstractAudioInput

    QIODevice* start(QIODevice *device = 0);

    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;

    QAudioFormat format() const;

    // MDevSoundObserver

    void InitializeComplete(TInt aError);

    void ToneFinished(TInt aError);

    void BufferToBeFilled(CMMFBuffer *aBuffer);

    void PlayError(TInt aError);

    void BufferToBeEmptied(CMMFBuffer *aBuffer);

    void RecordError(TInt aError);

    void ConvertError(TInt aError);

    void DeviceMessage(TUid aMessageType, const TDesC8 &aMsg);

private slots:

    void pullData();

private:

   void open();

   void startRecording();

   void startDevSoundL();

   void startDataTransfer();

   CMMFDataBuffer* currentBuffer() const;

   void pushData();

   qint64 read(char *data, qint64 len);

   void bufferEmptied();

   Q_INVOKABLE void close();

   qint64 getSamplesRecorded() const;

   void setError(QAudio::Error error);

   void setState(SymbianAudio::State state);

   QAudio::State initializingState() const;

private:

    const QByteArray m_device;

    const QAudioFormat m_format;

    int m_clientBufferSize;

    int m_notifyInterval;

    QScopedPointer<QTimer> m_notifyTimer;

    QTime m_elapsed;

    QAudio::Error m_error;

    SymbianAudio::State m_internalState;

    QAudio::State m_externalState;

    bool m_pullMode;

    QIODevice *m_sink;

    QScopedPointer<QTimer> m_pullTimer;

    QScopedPointer<CMMFDevSound> m_devSound;

    TUint32 m_nativeFourCC;

    TMMFCapabilities m_nativeFormat;

    // Latest buffer provided by DevSound, to be empied of data.

    CMMFDataBuffer *m_devSoundBuffer;

    int m_devSoundBufferSize;

    // Total amount of data in buffers provided by DevSound

    int m_totalBytesReady;

    // Queue of buffers returned after call to CMMFDevSound::Pause().

    QList<CMMFDataBuffer *> m_devSoundBufferQ;

    // Current read position within m_devSoundBuffer

    qint64 m_devSoundBufferPos;

    // Samples recorded up to the last call to suspend().  It is necessary

    // to cache this because suspend() is implemented using

    // CMMFDevSound::Stop(), which resets DevSound's SamplesRecorded() counter.

    quint32 m_totalSamplesRecorded;

};

QT_END_NAMESPACE

#endif