source: trunk/src/multimedia/audio/qaudioinput_win32_p.h

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation ([email protected])
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** This file is part of the QtMultimedia module of the Qt Toolkit.
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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 QAUDIOINPUTWIN_H
#define QAUDIOINPUTWIN_H

#include <windows.h>
#include <mmsystem.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/qmutex.h>

#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudiodeviceinfo.h>
#include <QtMultimedia/qaudioengine.h>


QT_BEGIN_NAMESPACE

class QAudioInputPrivate : public QAbstractAudioInput
{
    Q_OBJECT
public:
    QAudioInputPrivate(const QByteArray &device, const QAudioFormat& audioFormat);
    ~QAudioInputPrivate();

    qint64 read(char* data, qint64 len);

    QAudioFormat format() const;
    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;

    QIODevice* audioSource;
    QAudioFormat settings;
    QAudio::Error errorState;
    QAudio::State deviceState;

private:
    qint32 buffer_size;
    qint32 period_size;
    qint32 header;
    QByteArray m_device;
    int bytesAvailable;
    int intervalTime;
    QTime timeStamp;
    qint64 elapsedTimeOffset;
    QTime timeStampOpened;
    qint64 totalTimeValue;
    bool pullMode;
    bool resuming;
    WAVEFORMATEX wfx;
    HWAVEIN hWaveIn;
    MMRESULT result;
    WAVEHDR* waveBlocks;
    volatile bool finished;
    volatile int waveFreeBlockCount;
    int waveCurrentBlock;

    QMutex mutex;
    static void QT_WIN_CALLBACK waveInProc( HWAVEIN hWaveIn, UINT uMsg,
            DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 );

    WAVEHDR* allocateBlocks(int size, int count);
    void freeBlocks(WAVEHDR* blockArray);
    bool open();
    void close();

private slots:
    void feedback();
    bool deviceReady();

signals:
    void processMore();
};

class InputPrivate : public QIODevice
{
    Q_OBJECT
public:
    InputPrivate(QAudioInputPrivate* audio);
    ~InputPrivate();

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

    void trigger();
private:
    QAudioInputPrivate *audioDevice;
};

QT_END_NAMESPACE

#endif